JPS5931361Y2 - Wood processing machine spacing setting device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a spacing setting device for wood processing machines such as automatic planing machines and super-finishing planing machines.

The following explanation will be given using an automatic planer as an example of a wood processing machine.

In an automatic planer, the head to which the material feeding member consisting of the planer cylinder and material feeding rollers is attached is raised and lowered, and the distance between the material feeding path and the opposing material feeding table is set to the thickness of the wood to be processed. was common.

In order to automatically set the distance, there is a method in which the head is provided with a plate thickness detecting means and the head is moved up and down by the detection force of the plate thickness detecting means.

However, according to this method, when the thickness of the wood is larger than the interval between the material feeding paths, it is necessary to continue pushing the wood so that it comes into contact with the thickness detection means while the head is rising.

This operation became more troublesome as wood became a major material.

The purpose of the present invention is to eliminate the above-mentioned conventional drawbacks and to facilitate operations when setting intervals.

In the present invention, a plurality of plate thickness detection means are arranged in a vertical direction, and the amount of rotation of a reversible motor is regulated in accordance with the vertical position of the plate thickness detection means, so that the head or material feeding table can be adapted to the plate thickness. It is characterized by being raised and lowered by a certain distance.

゛Hereinafter, the present invention will be explained with reference to FIGS. 1 and 2 showing one embodiment.

FIG. 1 is a side view showing a schematic configuration of an automatic planer.

A head 3 is provided above a material feeding table 2 installed at an upper position of a machine body 1 to face each other so as to form a material feeding path therebetween.

The head 3 is supported by the body 1 via a plurality of columns 4 so as to be movable up and down.

That is, the head 3 is raised and lowered by rotating a screw shaft 5 by a reversible motor 6, and the distance to the material feeding table 2, that is, the distance between the material feeding paths can be set and adjusted.

A planer cylinder 7 equipped with a plurality of planer blades 8 is rotatably supported approximately at the center of the head 3, and in front and behind the planer cylinder 7, material feeding rollers 9 constituting the material feeding member of the present invention are rotatably supported. Supported.

These planer cylinder 7 and feed roller 9 are driven by a suitable motor and power transmission means (not shown).

Front end of material feeding table 2 (the right side in Figure 1 is the front)
Presence/absence detection means 10 for detecting the presence/absence of wood 21 to be processed is provided.

Behind the detection means 10 and in front of the front end of the head 3, there is a plurality of plate thickness detection means 1 arranged vertically.
1 to 14 are arranged so that they are positioned toward the front as they go upward.

20 is a distance detection means provided on the head 3 soil,
The roller 16 constituting the detection point is the plate thickness detecting means 1.
It is attached to the lower end of the arm 17 so as to be located behind the arms 1 to 14.

The arm 17 is rotatably attached to the head 3 via a fixed shaft 18, and operates the actuator of the distance detection means 20.

The button 19 is a pin for adjusting the lower surface of the roller 16 to a position a certain distance lower than the cutting surface.

Reference numeral 15 denotes a setting start detection means provided on the material feeding table 2 behind the roller 16 and in front of the front end of the front material feeding roller 9, and detects when the wood 21 is being fed, as will be described later. When detected, the head 3 is started to descend via the reversible motor 6.

The detection means 10 to 15 and 20 are composed of a detector such as a microsinch and a circuit, etc., and output a logic 1 when the wood 21 is detected.

FIG. 2 is a block diagram for controlling the drive of the reversible motor 6 based on the outputs of the detection means 10 to 15 and 20.

Reference numerals 22 to 25 are AND gates which take the AND gates of the outputs of the plate thickness detection means 11 to 14, respectively, and the outputs of the presence/absence detection means 10 and the NOR gate 32, which will be described later. Added.

Reference numeral 26 denotes the presence/absence detection means 10, the interval detection means 20, the output of the NOR gate 32, and the detection means 15 via the inverter 35.
is an AND gate that performs a logical product with the output of the timer 31, and its output is added to the input terminal of the timer 31.

Timers 27-31 generate logic 1 outputs with pulse widths T2□-T31, respectively, which are applied to the input terminal of NOR gate 32.

The output of the Noah gate 32 energizes the relay coil 43 via the inverter 33 and the AND gate 34, closes the relay contact 45, and starts and rotates the white road motor 6 (at this time, the reversible motor 6 rotates in the normal direction, Assume that head 3 rises).

Therefore, the pulse widths T2□-T3 of the timers 27-30
If o is set so that T27 > T28 > T2O > T2O, the amount of rise of the head 3 will be the largest when the board thickness detection means 11 detects the wood 21, and the board thickness detection means 14 will detect the wood 21. When this occurs, the amount of rise of the head 3 becomes the smallest.

Note that each amount of rise of the head 3 is set such that the lower surface of the row 216 is located slightly above the upper surface of the support 21.

Further, the timer 31 causes the head 3 to rise slightly when the wood 21 whose upper surface is located between the lower surface of the roller 16 and the plate thickness detecting means 14 is fed and the roller 16 is pushed up and the interval detecting means 20 detects that the wood 21 is fed. The pulse width T3□ is set such that T2O>T31.

When the wood 21 is further fed with the lower surface of the roller 16 placed above the upper surface of the wood 21, the detection means 15 detects the wood 21 and sets the flip-flop 37 via the differential circuit 36.

As a result, the AND gate 41 opens its gate, energizes the relay coil 44, closes its relay contact 46, reverses the reversible motor 6, and lowers the head 3.

When the head 3 descends and the roller 16 hits the upper surface of the wood 21 and the detection means 20 operates, the AND gate 38 opens and sets the flip-flop 40 via the differential circuit 39.

As a result, the AND gate 41 closes, the relay coil 44 is deenergized, and the relay contact 46 opens, so the reversible motor 6 stops and the head 3 also stops its downward movement.

That is, the material feeding path interval between the material feeding table 2 and the head 3 is set to a predetermined value corresponding to the thickness of the wood 21.

Note that the 0 side output of the Noritsubu flop 40 is applied to the AND gate 34, and the AND gate 34 does not open the gate, so even if the plate thickness detection means 11 to 14 operate erroneously, the reversible motor 6 will not operate correctly. The head 3 will not rise without turning.

42 is the flip-flop 37 when the power is turned on and when the wood 21 returns to the front after one cutting.
This is a circuit that generates a recent signal for resetting 40.

In the above embodiment, the head 3 is moved up and down to set the material feeding path interval, but the head 3 may be fixed and the material feeding table 2 is moved up and down.

Further, in the above embodiment, the head 3 is raised by rotating the reversible motor 6 for a time corresponding to the position detected by any one of the plate thickness detecting means 11 to 14.
The amount of rotation of the reversible motor 6, the amount of rise of the head 3, or the amount of descent of the material feeding chifur 2 is measured, and when the amount matches the amount set by the detected plate thickness detection means 11 to 14, the elevating member is raised and lowered. may be stopped.

Hereinafter, a method of measuring the amount of rotation of the reversible motor 6 and controlling the amount of elevation will be explained with reference to FIGS. 3 and 4.

Note that the same parts as in FIGS. 1 and 2 are given the same reference numerals.

An encoder disk 50 mounted on the shaft or threaded shaft 5 of the reversible motor 6 causes a cooperating pink-up 51 to generate one pulse every time the reversible motor 6 rotates through a predetermined angle.

52 receives the outputs of the AND gates 22 to 26, and displays the value obtained by converting the amount of rise corresponding to each plate thickness detection means 11 to 14 and the interval detection means 20 into the amount of rotation of the reversible motor 6 in a 4-bit binary number. A circuit for regulating the amount of rise generated by
Flip-flop 37 added to inhibit gate
When the output on the O side becomes logic 1, each bit of the output becomes logic 0.

53 is a counter that counts pulses from the pickup 51 and generates a logic 1 output when the count value matches the value set from the increase amount regulating circuit 52.

Reference numeral 56 denotes a flip-flop which is set via a differentiating circuit 55 by the output of an OR gate 54 that calculates the logical sum of the output bits of the increase amount regulating circuit 52, and is reset by the output of the counter 53; Reversible motor 6 via the relay coil 43 and contacts 45
It rotates in the normal direction.

According to this embodiment, the amount of rise of the head 3 can be controlled accurately and reliably, and the material feeding path interval can be set accurately.

As described above, with the present invention, when the board thickness detection means detects the board thickness of the wood to be processed, the head or material feeding table moves up and down by a predetermined amount according to the board thickness, so that the board thickness of the wood can be detected. It is not necessary to keep pressing the device, making the operation easier when setting the interval.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which FIGS. 1 and 3 are side views, and FIGS. 2 and 4 are block circuit diagrams. In the figure, 2 is a material feeding table, 3 is a head, 5 is a screw shaft, 6 is a reversible motor, 7 is a planer cylinder, 9 is a material feeding roller,
10 to 15.20 are detection means, 16 is a roller, 21 is wood to be processed, 22 to 26.34.38.41 is an AND gate, 27 to 31 is a timer, 32 is a Noah gate, 33.3
5 is an inverter, 36, 39, 55 is a differential circuit, 37,
40 and 56 are flip-flops, 42 is a reset circuit,
43 and 44 are relay coils, 45 and 46 are relay contacts,
50 is an encoder disk, 51 is a pick amplifier, 52
53 is a counter, and 54 is an OR gate.

Claims (1)

[Scope of Claim for Utility Model Registration] A material feeding table and a head that are provided facing each other so as to form a material feeding path therebetween, and a material feeding table or head that is provided with a material feeding table or head that allows the workpiece wood to be processed along the material feeding path. It has a material feeding member for feeding, and a processing tool provided on a material feeding table or head at approximately the center of the material feeding path, and at least one of the material feeding table and the head is raised and lowered by a reversible motor to In a wood processing machine configured to set intervals between material feeding paths, a plurality of wood processing machines are arranged vertically on the head in front of the front end of the material feeding member, and are arranged so as to be positioned toward the front as they go upward. a plate thickness detecting means, a distance detecting means provided in the shape of a head so that its detection point is placed upright behind the plate thickness detecting means, and a distance detecting means located behind the distance detecting means and from the front end of the material feeding member. A detection means for starting setting provided on the front material feeding table and a regulation that receives the outputs of the plate thickness detection means and regulates the amount of rotation of the reversible motor in accordance with the vertical position of each plate thickness detection means. A spacing setting device comprising means for raising and lowering the material feeding table or head by a distance corresponding to the thickness of the wood.