JPS608961Y2 - Plate thickness detection mechanism for wood processing machines - Google Patents

Description

[Detailed description of the invention] The present invention relates to a plate thickness detection mechanism for a woodworking processing machine, which does not require a foot switch, etc., and is suitable for reliably detecting the plate thickness of the workpiece material. It is about the mechanism.

In conventional wood processing machines, when detecting the thickness of a workpiece material, the workpiece material is inserted into a workpiece material feeding section and a foot switch or the like is operated to detect the thickness of the workpiece material.

Therefore, whenever the length of the material to be processed changes, the foot switch or the like must be moved to a position where it can be easily operated, resulting in poor workability.

The present invention was developed in view of the above, and its purpose is to create a woodworking processing machine that does not require a foot switch, can detect plate thickness reliably, and improves work efficiency. An object of the present invention is to provide a plate thickness detection mechanism.

The features of the present invention are that first and second detectors are provided in front of the elevating member, and a third detector that is operated by inserting the material to be processed is provided in the material feeding section of the material feeding table. ,
An arm mechanism is provided that operates or deactivates the first and second detectors according to the thickness of the workpiece material, and the reversible electric motor for lifting is moved in the upward direction depending on the operation or inactivation of the first detector. a first control means for rotating or stopping the motor in a downward direction when the third detector is activated, and then stopping the motor when the second detector is activated; The second control means is provided.

The present invention will be explained in detail below using the embodiments shown in FIGS. 1 to 3.

FIG. 1 is a schematic diagram showing an embodiment of a woodworking processing machine equipped with a plate thickness detection mechanism according to the present invention.

In FIG. 1, 1 is a support member, 2 is a material feeding table, and 3 is a support member.
4 is a lifting member, 4 is a plane blade provided in the center of the lifting member 3,
5 is a knife stock that stores the plane blade 4; 6 is a lifting member 3;
7 is a screw shaft, 8 is a reversible electric motor for lifting,
The screw shaft is rotationally driven by a reversible lifting motor 8, thereby raising and lowering the lifting member 3.

9 is an endless material feeding belt driven in the length direction of the material feeding table 2 provided opposite the lifting member 3; 10 is a plate thickness detection mechanism according to the present invention; FIG. 2 shows the plate thickness detection mechanism; FIG. 2 is a detailed configuration diagram showing an example.

In FIG. 2, reference numeral 11 indicates a plate thickness detection section, for example, a plate thickness detection roller, and 12.13 indicates a plate thickness detection section 11.
The arm 13 is rotatably supported by the support portion 14 by a rotary shaft 15, and the arm 12 is rotatably supported by the arm 13 by a rotary shaft 16.

. 17 is a fixed pin fixed to the arm 13 to suppress the movement of the arm 12; 18 is a fixed pin fixed to the support part 14 to suppress the movement of the arm 13; 19 is a coil spring disposed between the arm 12 and the support part 14. , 20 is arm 12,1
Stopper 3, 21 is a shaft that is pressed against the arm 13 by a coil spring 22 that is linked to the movement of the arm 13, and when the arm 13 rises above a predetermined value, a plate thickness detector consisting of a microswitch, a photoelectric detector, etc. 23 is activated.

24 and 25 are a rising detector and a descending detector for the elevating member 3 similar to the plate thickness detector 23, respectively;
is activated by the lowering of the arm 12 supported by the coil spring 19 so as to hit the fixing pin 17.
One end is movably supported by a coil spring 2, and the other end is supported by a coil spring 2.
It is activated when the plate 28 which is being pushed up by 7 is pushed down.

FIG. 3 is a block diagram showing an embodiment of the circuit of the plate thickness detection mechanism of the present invention.

In Fig. 3, 23, 24, and 25 are the respective detectors in Fig. 2, 29a to 29c are differentiating circuits, 30 to 32 are AND gates, 33, 34 are set/reset circuits, and 35 is a rising relay (coil). , 36 are lowering relays (coils) 35a and 36a are normally open contacts of relays 35 and 36, respectively. By opening and closing these contacts, the energization state from the three-phase power supply 39 to the reversible lifting motor 8 is changed, and the direction of rotation is changed. This is so that it can be regulated.

As shown in FIG. 2, the distance D□ between the lowest end of the plate thickness detection unit 11 and the upper surface of the material feeding table 2 is the plate J! of the workpiece material 40! !
When it is smaller than D2, when the material to be processed 40 is fed, the arm 12 rotates clockwise around the rotating shaft 16, and the rising detector 24 is activated and turned on.

As a result, the coil of the lifting relay 35 is excited, the contact 35a is closed, and the lifting reversible motor 8 rotates normally.

Due to this rotation, the screw shaft 7 rotates in the normal direction, and the elevating member 3 rises.

When the distance D□ becomes larger than the plate thickness D2 due to the rise of the elevating member 3, the plate thickness detection part 11 becomes free, and the arm 12 rotates counterclockwise by the tensile force of the coil spring 19, returning to its original state. At this time, the rising detector 24 is turned off, the relay 35 is turned off, the contact 35a is opened, the power to the reversible motor 8 is cut off, and the lifting member 3 stops after rising by inertia.

When the lifting member 3 has stopped and the workpiece material 40 is further fed in, the plate 28 is pushed down by the workpiece material 40, the lowering detector 25 is activated and turned on, and the 0 side output of the set-reset circuit 33 is Since it is at a high level, the output of the AND gate 30 becomes a high level, the coil of the lowering IJL'-36 is excited, the contact 36a is closed, and the reversible lifting motor 8 is reversed.

Due to this rotation, the screw shaft 7 is reversed, and the elevating member 3 is lowered.

As the elevating member 3 descends, the plate thickness detecting section 11 comes into contact with the upper surface of the workpiece material 40, and as it descends further, the arm 13 rotates counterclockwise around the rotating shaft 15, and the shaft 21 is rotated by the coil spring. 22, the plate thickness detector 23 is activated and turned on, and the O side output of the set/reset circuit 33 becomes low level.

Therefore, the output of the AND circuit 30 also becomes low level, the relay 36 is turned off, the contact 36a is opened, the power to the reversible motor 8 is cut off, and the elevating member 3 is lowered by inertia and stopped when properly pressurized.

In addition, when the plate thickness D2 is smaller than the distance D1 at the beginning of plate thickness detection, the elevating member 3 is not raised by the lifting detector 24, but the subsequent plate thickness detection operation is the same as in the above case. .

Note that after one plate thickness detection, the set/reset circuits 33 and 34 are not reset unless the plate thickness detector 23 is turned off after the descending detector 25 is turned off.

According to the above-mentioned embodiment of the present invention, the plate thickness is automatically detected at the workpiece material feeding section and the reversible lifting motor is rotated forward/reverse or stopped, thereby eliminating the need for a foot switch, etc. Moreover, there is an effect that reliable plate thickness detection operation can be performed and work efficiency can be improved.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a woodworking processing machine equipped with the plate thickness detection mechanism of the present invention, and FIG. 2 is a detailed configuration diagram showing an embodiment of the plate thickness detection mechanism of FIG. 1. , FIG. 3 is a block diagram showing an embodiment of the circuit of the plate thickness detection mechanism of the present invention. 2... Material feeding table, 3... Lifting member, 4... Curved planer blade, 8... Reversible electric motor for lifting, 9
... Material conveyance belt, 10 ... Plate thickness detection mechanism, 11 ... Plate thickness detection section, 12, 13 ... Curved arm, 14. Curved support section, 15 .16...Rotating shaft, 17,18...Fixing pin, 19.22...
... Coil spring, 20 ... Stopper, 21
...Shaft, 23...Plate thickness detector,
24゜25... Detector for rising and falling, 28...
...Plate, 30-32...And gate, 33.34...Set reset circuit, 35
, 36... Ascending and descending relay, 35a, 36
a... Normally open contacts of curved relays 35 and 36, 40...
・Work material.

Claims (1)

[Scope of utility model registration request] An elevating member having a processing tool is placed above the material feeding table on which the workpiece is placed, and a material feeding path is formed therebetween, and the spacing between the material feeding paths is adjusted by using a reversible electric motor for elevating the elevating member. In the woodworking processing machine, which can be adjusted by raising and lowering, the workpiece material is sent onto the material feeding table and cut by the processing tool, and the first and second parts are provided in front of the lifting member. a detector, a third detector provided in the workpiece material feeding section of the workpiece table and operated by the insertion of the workpiece material, and a third detector provided in the workpiece material feeding section of the workpiece table, and a third detector that operates according to the plate thickness of the workpiece material; an arm mechanism that activates and deactivates the detector;
a first control means that rotates or stops the reversible lifting motor in the upward direction depending on whether the first detector operates or not; and a first control means that rotates the reversible lifting motor in the upward direction or stops the lifting reversible electric motor when the third detector operates; 1. A plate thickness detection mechanism for a woodworking processing board, characterized in that the mechanism comprises a second control means for rotating the electric motor in a direction and then stopping the electric motor when the second detector operates.