JPH072168Y2 - Machine Depth Detector for Workpiece - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention is designed to move a tool relative to a work, and a tool feed mechanism is provided with a head of the tool via a moving plate. It relates to a device for determining.

[0002]

2. Description of the Related Art For example, in a woodworking machine, in order to determine the working depth of wood using only the corners, a shaft has been attached in parallel with the corners only, and the tip of the shaft is attached to the workpiece. The processed surface was detected by contact.

However, in such a method, there is a trouble that the length of the shaft must be changed when the size of only the corner, especially the length is changed, and the shaft must be provided near the working surface of the corner only. Therefore, there were some problems such as being an obstacle.

[0004]

The present invention has been made by paying attention to the above-mentioned points. The problem is that the adjustment of the corner-only machine is possible even if the size of the tool such as the corner is changed. It is not necessary to be able to detect the working depth accurately.

[0005]

In order to solve the above-mentioned problems, according to the present invention, a blade head 3 is attached to a feed mechanism 1 via a movable platen 2, and the head 3 is fixed by a first stopper 4 provided on the movable platen 2. The head 3 is movably combined with the movable platen 2 such that the head 3 is locked and moved integrally, and the head 3 is separated from the first stopper 4 when the cutting edge comes into contact with the workpiece. A switch 5 which is switched by relative movement of the head 3 when the head 3 is separated from is provided between the movable platen 2 and the head 3, and is locked to move the head 3 integrally with the movable platen 2 after switch input. A second stopper 6 is provided on the movable platen 2, and a position detection unit 15 including a position display unit 7 provided along the moving path of the cutting tool and a detector 8 for scanning the position to know the processing depth is provided in the feed mechanism 1. Between the side and the moving board 2 Kicking in which took measures that.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A description will be given below with reference to the drawings. Each drawing is an example of a corner cutter for woodworking, and this corner cutter has a feed mechanism 1 for moving the blade C downward at the upper rear side, and a moving platen 2 is attached to the mechanism 1. The head 3 to which the blade C is attached is combined with the movable platen 2 by a dovetail-shaped slide portion 9 so as to be movable relative to each other.

[0007] 10 is a processing table installed only in the center of the front of the machine, 11 is a fixing means for fixing the workpiece W on the processing table 10, 12 is an operating lever of the means 11, 13 is the processing table 10
The right and left slide mechanism of is shown. The cutting tool C is the processing table 10
It is possible to move up and down at right angles to the upper workpiece W.

[0008] and the head 3 and the locking as described above, the same first stopper 4 for lowering the movable platen 2 together are provided in the lower portion of the movable platen 2. The first stopper 4 interlocks the head 3 with the descent of the blade C, and is provided so that the head 3 moves integrally with the movable platen 2 whenever the blade C precedes.

In the case of the embodiment, the relative movement of the head 3 occurs when the moving platen 2 continues to descend while the head 3 stops, and due to the difference in this movement, the contact is closed and the limit is reached. A switch 5 including a switch is provided. In the illustrated switch 5, the operator 5a is the head 3
Is attached to the movable platen 2 so as to come into contact with. The switch 5 may utilize the stop of the head 3 caused by the contact of the blade C attached to the head 3 with the workpiece W and the movement of the movable platen 2. Therefore, an installation structure other than the above is appropriately adopted. You can also do it.

The blade C contacts the workpiece W, and the switch 5
A second stopper 6 is provided on the side of the moving platen 2 in order to lower the head 3 integrally with the moving platen 2 again after the switching. After switching the switch, the head 3 descends while being pressed from above by the second stopper 6.

Racks are installed in parallel as a position display section 7 which constitutes one of the position detecting means 15 laterally along the moving path of the blade C. This rack has a large number of tooth portions 14 and toothless portions 16 arranged in parallel vertically as a counting means for position display.

The other of the position detecting means 15 is a detector 8, which is provided so as to move up and down together with the movable platen 2. This detector 8 uses a proximity switch to count the number of rack teeth and measure the machining depth of the blade C. The proximity switch operates without contact with the rack side.

The position detecting means 15 is not limited to the combination of the rack and the proximity switch, and any other detecting method can be used. Further, even when the proximity switch is used, it is not necessary to form the position display unit 7 with a rack, and for example, a large number of holes may be arranged vertically. In each figure, 20 is a motor board to which a motor 21 is attached, 22 is a power transmission unit cover, 23 is a bearing unit, 24 is a quick chuck of a blade, 25 is a joint shaft, 26 is a corner holder, and 27 is an LM guide. .

In the apparatus of the present invention constructed as described above, the handle 17 of the corner pedestal A is operated with respect to the workpiece W set on the processing table 10, and the head 3 having the blade C mounted thereon is lowered together with the movable platen 2. When the tip 18 of the blade C abuts on the processing position 19, the switch 5 senses it.

That is, of the head 3 and the movable platen 2 that have descended as a unit, the head 3 stops because the blade C abuts the machining position, and the movable platen 2 continues to descend, so that the head 3 is relatively moved. As a result, the switch 5 is turned on and the position detecting means 15 is operated.

When the position detecting means 15 is operated, the amount of descending from the time when the tip 18 of the cutting tool C abuts the machining position 19, that is, the machining depth from the surface of the workpiece is calculated by counting the rack teeth 14. The depth can be known while the actual digging process is in progress. This detection work has no problem even if the blade C is replaced, and the processing depth can be accurately known.

Although the machining depth can be detected in this manner, it is of course possible to automatically manage the machining amount by machining only the corners by combining this with a device for program-controlling the machining depth in advance.

[0018]

Since the present invention is constructed and operates as described above, it is detected by the switch 5 that the blade has come into contact with the workpiece, and the position detecting means 1 starts from that point.
Since 5 is operated to detect the position, there is an effect that the working depth of the blade can be accurately known.

In particular, the apparatus of the present invention detects the position from the time when the blade comes into contact with the workpiece, so that even if the size of the blade is different, especially when the length is different, no adjustment is made and the situation is exactly the same as before. Since the machining can be continued and the fact that the blade itself has contacted the workpiece can be detected, the precision and reliability are high, and extremely excellent practicality is exhibited.

[Brief description of drawings]

FIG. 1 is a side view of a main part of a corner-only machine incorporating the device of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a bottom view of the same.

FIG. 4 is an explanatory perspective view showing an embodiment of the device of the present invention.

FIG. 5 is a front view of the entire corner chisel machine.

Claims (3)

[Scope of utility model registration request] 1. A blade mounting head 3 for moving a blade with respect to a workpiece via a moving platen 2 in a blade feeding mechanism 1.
Is a device for determining a working depth of a workpiece by a blade attached to the head 3, wherein the head 3 is locked by a first stopper 4 provided on the moving platen 2 and integrally moved, And a head when the head 3 separates from the first stopper 4 so that the head 3 separates from the first stopper 4 when the cutting edge comes into contact with the workpiece so that the head 3 separates from the movable platen 2. The switch 5 which is switched by the relative movement of the moving board 3 and the head 3
And the head 3 after the switch input,
The movable platen 2 is provided with a second stopper 6 which is locked to move integrally with the position indicator 7 provided along the moving path of the blade and the detector 8 which scans the position indicator 7 to know the working depth. An apparatus for detecting a working depth with respect to a work having a structure in which the position detecting means 15 is provided between the feed mechanism 1 side and the movable platen 2. 2. The machining depth of a workpiece according to claim 1, wherein the switch 5 is a limit switch and is provided on the movable platen 2 so as to be in contact with the head 3 and to detect the relative rise thereof. Detection device. 3. The position display section 7 is installed vertically.
A processing depth detection for a work piece according to claim 1, wherein the detection device 8 is a rack having a large number of teeth 14, and the detector 8 comprises a proximity switch mounted on the movable platen 2 for counting the number of teeth of the rack. apparatus.