JPS58961B2 - Reciprocating material feeding device for woodworking machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reciprocating material feeding device for a woodworking machine that reverses the material feeding member to return the material after cutting the material.

When transporting materials back and forth using conventional woodworking machines such as copper plates,
A detector that detects the rear end of the material is installed in front of the power adjustment device installed on the table, and by connecting this detector to the rotation switch of the material feeding member via a timer, the power adjustment is performed from the detection point of the detector. If you set a timer to wait for the material to move until immediately after cutting, it is convenient to be able to return the material at the same time as the cutting ends, regardless of the length of the material. When there is a notch, the detector detects this notch as the trailing edge of the material and activates a timer, which has the disadvantage that the material is returned midway through cutting. When changing the timer, unless the timer setting is changed each time, there is a disadvantage that the material may be returned before the cutting is completed, or may be sent to the rear without being returned.

However, in the reciprocating material feeding device for a woodworking machine according to the present invention, due to a change in the pressure applied to the part of the power regulating holder installed on the table that is pressurized during cutting and is depressurized at the end of cutting,
A cutting end detector that emits a detection signal is installed oppositely, and this detector is connected to the rotation switch of the material feeding member, so that the material sent to the material feeding member and cut by adjusting force is When the cutting is finished, the detector detects the end of cutting by removing the pressure from the force regulating holder that was pressurized during cutting, switches the rotation switch, and returns the material by reversing the material feeding member. Not only is it possible to reliably return the material at the end of cutting, regardless of the length, but this end-of-cutting detection method also allows the material to be returned from the adjustment holder during feeding even if there is a notch in the middle of the material. Since the pressure is not released and therefore the end of cutting is not detected, the material is conveniently fed to the end and is not returned until the entire length has been processed, and the feeding speed can be changed depending on the material type and finishing conditions. It also has the feature that the material can be reliably returned after cutting.

Next, an embodiment of the apparatus according to the present invention will be described below with reference to the drawings.

In the figure, 1 is the fuselage, on which a table 2 is fixed, and in the center of the table 2 there is a circular recess 3 as shown in Figure 1 of the figure.
A circular copper plate 4 is rotatably fitted into the recessed portion 3, a knife stock 5 is inserted into the circular copper plate 4 in a freely removable manner, and a regulating force 6 is attached to the knife stock 5, or a table is provided. A diagonal groove 7 is provided in the center of the knife 2 as shown in Figure 5 of the drawings, and a knife stock 8 with a force adjustment 6 attached thereto can be freely inserted into and removed from the groove 7, or as shown in Figure 4 of the drawings. As shown in the figure, a long diagonal groove 10 is provided across the central table 2 and the shaft portions 9°9 on both sides thereof, and copper B6, 6 facing in opposite directions are mounted side by side within this diagonal groove 10. 11 is fitted.

Reference numerals 12 and 12 denote a pair of columns erected on the machine body 1 on one side of the table 2, and support an elevating body 13 so as to be able to rise and fall freely, and this elevating body 13 is supported by the joining material 14 of the columns 12, 12. The feed screw 15 is screwed together to adjust the elevation, and a pair of rollers 16 are provided at the front and rear of the elevating body 13.
．． A belt-type material feeding member 18 stretched over 17 is provided, and a reversible conductor 20 is linked to this material feeding member 18 via a speed reducer 19.

Reference numeral 21 denotes a pressure-operated type detector such as a piezoelectric element, a semiconductor strain resistance type sensor, a crystal type sensor, or other type of detector, and a circular copper plate 4
・The knife stock 8, the sliding copper plate 11, etc., are
It is installed opposite to the part that is pressurized by the material feeding force during cutting and is depressurized at the end of cutting, and changes the power generation amount and electrical resistance by changing the applied pressure, that is, the difference in pressure between pressurization and depressurization. Then, a detection signal is generated.

(This detector 21 is used in combination with an amplifier if the signal output is small.

) 22 is a rotation switch for the reversible motor 20 connected to the detector 21, which rotates the reversible motor in the normal direction when the normally closed contact closes;
Reverse when normally open contacts close.

23 is a timer which appropriately delays the detection signal of the detector 21 and transmits it to the rotation switch 22, so that the reversible motor 20 is reversed after stopping, thereby protecting the material feeding member and its drive system.

In this device, a rotating mechanism A rotated by a reversible electric motor 24 is linked to the circular copper plate 4, and the rotating mechanism A rotates the circular copper plate 4 to change the orientation of the copper B6 supported by it back and forth. Alternatively, the oppositely facing copper B6 attached to the sliding copper plate 11 can be moved alternately to the two sides of the table, or, although not shown in the drawing, the forward and backward facing copper B6 can be placed together on the table 2 to remove the material. When performing reciprocating cutting, refer to drawing No. 2.
As shown in the figure and FIG. 3, two sets of detectors 21, 21 are provided on the front side and the rear side of the force adjustment holder 4, and the end of cutting is alternately detected by these, and the rotation of the reversible motor 20 is alternately controlled. By converting it into forward and reverse directions and setting the number of times of switching using a setting circuit, it is possible to freely perform reciprocating cutting of the material any number of times.

B is a reciprocating mechanism such as a cylinder linked to the sliding copper plate 11, which reciprocates the sliding copper plate 11 back and forth to alternately position the front and rear facing coppers B6, 6 on the table 2.

Since one embodiment of the device according to the present invention is constructed as described above, when the circular copper plate 4 is used as a power adjustment holding body and the detector 21 is related to the lower side of the circular copper plate 4 as shown in FIG. In this case, by rotating the material feeding member 18 in the direction of the arrow in the same figure and feeding the material to the lower part thereof, the material will be transferred to the material feeding member 1.
8 pressurizes the adjustment holder 4 by transferring it to the table 2 while being pressed against it, the holder 4 lowers the pressure on the detector 21 to turn it off, and allows the material feeding member 18 to continue feeding the material. The plane blade 6 is advanced and its lower surface is cut,
When cutting is finished and the material comes off the copper B holder 4, the pressure is removed from the holder 4, so the detector 21 immediately turns on, detects the end of cutting the material, and switches the detection signal to rotation. Since the material is fed to the machine 22 and the rotation switch 22 is switched to reverse the reversible electric motor 20, the direction of rotation of the material feeding member 18 is changed immediately after cutting the material, and the material is returned to the front of the table 2. This operation is performed uniformly regardless of the length of the material, and even if there is a notch in the middle of the material and cutting is interrupted at this part, the pressurization of the adjustment holder 4 will continue. is sustained, so
Since the detector 21 does not detect the end of cutting, material feeding continues, and even material with notches does not return midway, and is not returned until it has been completely fed to the end and the entire length has been processed. be.

In particular, this device detects the end of cutting by removing the pressurizing force of the material feeding member 18 from the copper B holder 4, and operates the rotary switch 22, so that material feeding can be performed according to the material type and finishing conditions. Even if the speed is changed, the material can be reliably returned after cutting.

Also, when the detector 21 is provided at the rear lower part of the knife stock 8 as shown in FIG. 7 of the drawings, the same effect as in the case of the circular copper disk 4 described above is performed, but the detector 21 is installed as shown in FIG. 5 of the drawings. As shown in the figure, when the detector 21 is connected to the rear or side surface of the knife stock 8 which receives lateral pressure due to material feeding force during cutting, lateral pressure acts on the detector 21 while cutting the material, but the lateral pressure is removed when cutting is completed. In this case as well, the end of cutting can be detected by the detector 21, and the material can be returned in the same manner as described above.

Furthermore, this device rotates a circular copper plate 4 provided on a table 2 by a rotating mechanism A as shown in FIG.
6 back and forth, or by reciprocating the sliding copper plate 11 provided on the table 2 using the reciprocating mechanism B as shown in Figure 4 of the drawing, the forward and backward facing copper B6 are positioned on the table surface. Alternatively, although it is not shown in the drawing, when forward-facing and backward-facing copper B are installed together on table 2 and reciprocating material is fed as described above, reciprocating cutting can be performed to cut the material in the reciprocating process. However, in this case, two sets of detectors 21, 21 are provided before and after the adjustment holder as shown in Figures 2 and 3 of the drawings, and the end of cutting is detected both in the reciprocating operation and the like. If the material is sent back, the material can be reciprocated any number of times to perform cutting.

[Brief explanation of drawings]

The drawing shows one embodiment of the device according to the present invention.
The figure is a side view of a circular copper disc woodworking machine that uses this device. Figure 2 is a top plan view. Figure 3 is a side view of the sliding copper disc type woodworking machine. Figure 4 is a top plan view. FIG. 5 is a plan view of the knife stock type woodworking machine with the elevating body omitted. 6 and 7 are longitudinal sectional side views showing the structure and operation of the device. FIG. 8 is a wiring diagram. In the figure, 2 is the table and 6 is the copper B.
, 18 is a material feeding member, 4, 8, 11 is a holder made of copper B, 21
2 is a detector, and 22 is a rotation switch.

Claims (1)

[Claims] 1. In a woodworking machine equipped with a table equipped with a force adjustment and a material feeding member that feeds the material back and forth by changing the rotational direction in correspondence with the table, the force adjustment holder is pressurized during cutting, and the cutting is completed. A woodworking machine, characterized in that a cutting end detector is provided oppositely to a part that is depressurized to issue a detection signal in response to a change in applied pressure, and the detector is connected to a rotation switch of a material feeding member. reciprocating loading device.