SU967803A1 - Feed table - Google Patents

Description

The invention relates to wood processing, in particular to the production of edged lumber (boards) using trimming machines in the timber and woodworking industry.

The front table is known, which includes a cross conveyor for feeding unedged boards, a frame with support rollers and a system for controlling the installation mechanism to the size of the movable saw of the trimming machine 1.

Its disadvantage is the complexity of the electrical control system, which includes length sensors located along the axis of the front table at a distance from one another, a multiple of the standard gradation of the length of the lumber (unedged board). In addition, the control system includes width sensors that are multi-range and are located at the same distance as the length sensors. The signals from the sensors for the length and width of the lumber are fed into the unit for modeling squares of rectangles of standard width, the output resistors of which are made adjustable. The control system also includes a maximum finding unit with switches, drawbacks of the known control system, in addition to the complexity of the design and control of the installation mechanism for the size of the movable saw of the trimmer, is the need to use only an electric drive to drive this mechanism.

The purpose of the invention is to simplify the design of the control system.

ten

This goal is achieved in that the front table, which includes a cross conveyor for feeding unedged boards, a frame with support rollers and a control system

15 by the installation mechanism for the size of the movable saw of the trimming machine; a hollow drive shaft is mounted on the frame, on which the clamping disks are fixed with blades contacting with

20 are suspended on the frame by receiving brackets, and inside the hollow shaft there is a rod, at one end of which a turning segment equipped with a counterweight is fixed, and the other is connected with an installation mechanism for the size of the cutting saw of the cutting machine.

FIG. 1 shows a front table, side view} of FIG. 2 - swivel segment with unedged board; in fig. 3 - receiving brackets

Claims (2)

30 at the front of the machine tool at the time the unedged board is brought in from the cross conveyor; in fig. 4 the same, at the moment of the greatest deviation of the receiving brackets from the initial position; in fig. 5 - the same, with a notch illustrating the interaction of the receiving bracket with the blade; in fig. b - the same, view A in FIG. 5. Forward table contains rpmu 1 with support rollers 2. On the 1st frame there is mounted a control system for the installation mechanism on the size of the movable saw of the trimming machine, including a drive hollow shaft 3 with blades 4 and clamping discs 5. A rod 6 is passed through the drive hollow shaft 3, at one end of which a swivel segment 7 s against the weight 8. The other end of the rod is connected to the mechanism 9 for fitting the size of the movable saw of the trimmer with the aid of a flexible transmission 10 (the saw and the machine are not shown). The drive 11 of the hollow All 3 and transverse conveyor (not shown) is single, with speed control. The rotary segment 7 is crescent-shaped and has projections 12 on the inner edge, the distances of which from the base disks 5 correspond to a certain size of the width of the cut board according to GOST. During rotation of the drive hollow shaft 3, the blades 4 interact with the swivel receiving brackets 13 mounted on the pc1me 1 of the front table. On the lower part of each receiving bracket 13, a roller 14 is arranged on the side of the cantilever on the axis 15 of the mount. The installation of the receiving bracket on 13 on the frame 1 is made so that this roller 14 is in the area of rotation of the blades 4 and can interact with them. The receiving bracket 13 rotates freely about the axis 15 of the mount on frame 1, but under its own weight always takes the position indicated. 3, abutted against shock absorber. When the hollow shaft 3 rotates in the direction of the Phenomenon indicated by the arrow, the bores and 4, interacting with the roller, rotate the receiving bracket 13 until the roller bends around the horse's blade. After that, the bracket returns to its original position. For one revolution of the hollow shaft 3, the receiving bracket 13 makes four cycles (according to the number of blades). Work ahead of the table is as follows. From the cross conveyor, unedged boards 16 in a given mode arrive at the receiving brackets 13 all the way into the base disks 5. At the same time, the blades 4 touch the receiving brackets 13 at the lower point and turn them, shifting the board on the blades moving before the receiving brackets. When the blades of the drive hollow shaft 3 are rotated by about 45 °, the brackets 13 no longer interact with the blades 4, slide off them, and under the action of their own weight return to their original position. An unfinished board, upon its further movement, comes into contact with one of the projections 12 of the turning segment 7 and turns it. The angle (of.,:}) Of the rotation of the segment 7 depends on the width of the unedged board. When the rotatable segment 7 is rotated, the rod 6 rigidly connected with it is rotated, which, through flexible gear 10, drives the installation mechanism 9 to the size of the cutting machine's movable saw. After feeding by the pressure roller 17 of the uncut board 16 to the trimmer, the rotary segment 7 with the counterweight 8 returns to its original position. The proposed Forward Table allows simple means (without the use of expensive electrical equipment) to automatically control the movable saw of the trimmer in the process of feeding the unedged board. The invention includes a cross table, which includes a cross conveyor for feeding unedged boards, a frame with support rollers and a control system for setting up the size of the cutting saw's mobile saw, characterized in that, in order to simplify the design of the control system, a hollow drive shaft is installed on the frame. On which the clamping disks are fixed with blades in contact with the receiving brackets suspended on the frame, and inside the hollow shaft there is a rod, at one end of which a rotatable segment equipped with a counterweight is fixed, and the other is connected to the installation mechanism for the size of the cutting saw of the trimmer. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 309811, cl. В 27 В 5/04, 1968 (prototype). 7 ///////////// 77 // Y // y //////////// // Riga.1 fig 2. P Fig.Z 17 (rig