SU895656A2 - Apparatus for feeding logs into wood working machine - Google Patents

Description

(54) DEVICE FOR FEEDING TREES IN WOODWORKING

one

The invention relates to woodworking and can be used in woodworking enterprises.

A device for feeding logs into a woodworking machine according to ed. St. 677915, containing a bed, two longitudinal drive conveyors with upper and lower coaxially arranged traction bodies with grippers, a drive for coordinated convergence and dilution of conveyors, an autonomous drive of each traction body, and the grips of the lower and upper traction organs are mounted with displacement relative to each other feed direction 1.

The device has the following disadvantages: there is no means of automatically selecting the distances between the grippers depending on the length of the logs fed to the machine, the accuracy of the base of the logs is not ensured if the latter are fed one after the other in a different combination of lengths, since each log and the distance between the grips is determined visually by the operator.

MACHINE

As a result, significant errors are inevitable when basing logs.

The aim of the invention is to ensure the accuracy of the base of the logs following each other and a different combination of lengths,

This goal is achieved by the fact that the device is equipped with a block for setting the offset of the grippers relative to each other with sensors of the length of the logs, a tracking unit with sensors of the position of the grippers, an address flag for interacting with the sensors of the position of the grippers,

The last 15 and the address flag are mounted on the swivel supports, one of which is kinematically connected with the autonomous drive of the upper, and the other with the autonomous drive of the lower piston organs. The log sensors are made in the form of photocells, and the position sensors of the grippers are in the form of contactless switches that are displaced relative to each other in a circle and electrically connected with the log length sensors and autonomous actuators of the traction bodies.

FIG. 1 shows a device for feeding logs to woodworkers 3ti

Breaming machine, side view; 2, the same top view; in fig. 3 is a section A-A in FIG. 1 (attachment of grips to traction organs); in fig. 4 is a log based layout; in fig. 5 is a kinematic diagram of the device; figure 6 is the principal electrical circuit.

The log supply device consists of a bed 1, two longitudinal conveyors 2 with upper and lower coaxially arranged traction bodies 3 and 4 with corresponding front and rear grippers 5 and 6, with each traction body made, for example, with one gripper. The grippers 6 lower 4 and grippers 5 of the upper 3 traction bodies are mounted displaced relative to each other in the direction the log is fed. On the frame frame 7 is mounted with a drive 8 of coordinated approach and dilution of the conveyors 2. Each traction body 3 or 4 is equipped with a drive sprocket 9 or

10 and autonomous drive in the form of a pair of chain articulated dvuhzvennikov

11 t 12, connected on one side to the drive sprocket 9 and 10, and

on the other, with an engine 13 or 14, while the engine 13 through the articulated two-links 11 and 12 and the driving sprocket 9 drives the autonomous drive of a pair of upper traction organs 3, and the engine 14 through the specified two-links 11 and 12 and the driving sprocket 10 carries out an autonomous drive a pair of lower organs of traction 4.

For the orientation of the logs, the curvature is sideways to table 15. Logs are fed to the device by conveyor 16.

The device has a block for setting the gripper displacement, which is made in the view of the follower unit with the address flag 17 and the position sensors of the grippers 18, 19, 20 and the logs length sensors electrically connected with them, included in the control unit, made in the form of three photo cells 21 , 22, 23 located in front of the conveyors, and at a certain distance 6 and EO from each other. In addition, the device has two track switches 24, 25 mounted at the exit of the grippers 5 and 6 from engaging with a log, electrically connected with autonomous drives 13 and 14 and intended for switching the speed of said

drives from working to accelerated

The device is also equipped with a traveling switch 26 installed at the entrance of the front grippers 5 to the working zone of their engagement with the log, electrically connected with one of the motors 13 of the upper traction bodies 3, as well as with a sensor interacting with the front end of the log as, for example movable stop 27 installed at a distance Bj from the photocell 23 and the limit switch 28. The position sensors of the grippers 18, 19, 20 are mounted on the swivel support 29, and the address flag 17 on the swivel support 30. The swivel bearing 29 is kinematically connected to the car genomic actuator 14 by a pair pomoschi..zubchatoy 31 32

and sprockets 33 with a gear ratio that provides rotation of the support 29 with a rotational speed equal to the number of revolutions of the thrust member 4. The rotary support 30 is kinematically connected with an autonomous drive 5 13 by means of a gear pair 34 and 35 and sprocket 36 with a gear ratio that provides rotation support 30 with a rotational speed equal to the number of revolutions of the traction device 3. 0 The position sensors of the grippers 18, 19, 20 are connected to the sensors of the length of the logs with the photo cells 21, 22, 23 through the block of intermediate motion relays 37,38,39. Control relays 40, е 41, 42 are connected in series to the circuit of the closing contacts of the length sensors. The speed switching relays 43, 44, 45 are connected through the closing contacts of the position sensors of the grippers 18, 19, 20 and the contact terminals 1Р37, 1Р38, 1Р39 correspond to the intermediate motion relays 37, 38, 39, and the motion relays interlock with each other by means of their circuit of the closing contacts 1P37, 1P38, 1P40, 1P41, 1P42 and the opening contacts of 2P41.2P40, The circuit of additional relays 46, 47, 48, 49 include the opening contacts of limit switches 24, 25, 0 26.28. To turn on drives of upper gangs of organs 3 for operating speed and for drives of lower gangs 4 for increased speed, there are actuating relays 50, 51 5 with closing 1P48, 1P49, 1P42, 1P46, 1P51 and opening contacts 2P47, 2P43, 2Р44, 2Р45 corresponding relays 42-49,51.

A The device works as follows.

The log conveyor 16 is fed to the table 15 on which it is gravitationally oriented by curvature laterally. The front end of the moving log is turned up to the stop 27, turns on the limit switch 28, and the actuating relay 49, which prepares the actuating relay 50, included in the motor control circuit 0, 13 to activate is triggered. .

Claims (2)

- At this time, the front grippers 5 are in the initial position, which is controlled by a switch 26, which triggered the actuating relay 48, and then the executive relay 50, enabling the engine 13 of the upper traction bodies 3 with the front grippers 5 to the operating speed . When the coWeel 16 and the upper body 3 move together, the front arms 5 are set at a predetermined distance from the top end of the log and the log is pulled forward. At this time, the rear grippers 6 of the lower traction organs 4 come out of their initial position, which is controlled by a limit switch 24, when triggered, actuating relay 46 is activated, which, with its short-circuiting contacts 1P46, switches actuator relay 51 to ensure that the lower pulling engine 14 turns on Organs 4 The rear grippers 6 begin to move at a higher speed and move until the address flag 17 turns on that position sensor 3, 18, 19 or 20, which is prepared to be turned on by one of the actuators. depending on the length of the input log of the photocells 21, 22 or 23, giving the value. displacement of grippers. After one or another position sensor of the grippers 18, 19 or 20 is activated, one or another relay 43, 44 or 45 switches on the operating speed of the motor 14 of the linear organs 4. In this case, the distance between the grips 5 and 6 will be equal to the specified one. The actuator 8 aligns the conveyors 2 in a coordinated fashion, and the log, retracted in the grippers with the necessary clamping force, is fed into the machine. Synchronous joint movement at the working speed of the grippers -5 and 6 with the log will occur until then. until the front hauls 5 come out when the sprockets 9 are out of engagement with the log and one of them interacts with the limit switch 25 (at this time the log is based in the machine guides and the rear hooks 6). When the track switch is triggered, the engine 25 of the upper organs of the traction device 3 switches to a higher speed and the front grippers 5 move on it, and the rear grippers 6 at this time continue to move at operating speed. The front grippers 5 continue their movement out of the zone of engagement with the log at an increased speed until one of them interacts with the limit switch 26 of their initial position and breaks the engine power supply circuit 13. The rear grippers 6 continue their movement at working speed until until the stars of sprocket 10 come out of engagement with the log and one of them interacts with the limit switch 24 of their initial position, which will break the feed circuit. motor 14. Next, the cycle repeats. The use of the proposed device for feeding logs, for example, in the line of aggregate processing of logs will increase the accuracy of the base, and thus will increase the useful yield of lumber. In addition, the use of this device will allow to give logs to the machine following each other in the difference in the combination of lengths, without preliminary sorting by length, to increase the degree of automation and reduce maintenance costs. Claims of the invention 1. A device for feeding logs to a woodworking machine according to ed. St. 677913, distinguished by e. so that, in order to increase the accuracy of the base of the logs following each other in a different combination of lengths, it is equipped with a block for setting the offset of the grippers relative to each other with the log length sensors, a tracking unit with the sensor 1 for the position of the grips, an address light for interacting with the sensor the positions of the grippers, with the latter and the center flag set on the swivel supports, one of which is kinematically associated with the autonomous drive of the upper ones and the other with the autonomous drive of the lower traction organs. 2. The device according to claim 1, characterized in that the log length sensors are made in the form of photo cells, and the position sensors of the grippers in the form of contactless switches, which are displaced relative to each other around the circumference and electrically connected to the log length sensors and autonomous drives gov organs. Sources of information, rintye taken into account during the examination 1. USSR author's certificate 677913, cl. B 27 B 2.9 / 00, 1977. -one / to w: ii  / / thirty  J i T16 27 1 2B I FIG. 2 il. it 4 22 21 -GSS 23 JTT r ff to W f 21 Aa . 4f 20. FIG. f FIG. 6