JPS6122604B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Objects of the Invention) The present invention relates to a method and apparatus for detecting the switching position of a tool rest from high-speed feed to walk feed in a veneer race.

(Prior Art) Conventionally, the determination of the position at which the veneer race tool rest should be switched from high-speed feed to walk feed was based on visual judgment by the operator. Therefore, due to the error in judgment,
Cutting of the log may start with high-speed feed, which is extremely dangerous, or the feed may be switched to foot feed further ahead of the log than necessary, resulting in unnecessary time being wasted cutting the log. Something happened.

(Structure of the Invention) The present invention has been made in view of the above-mentioned problems, and its gist is that a maximum diameter detection means for detecting the maximum diameter of logs using light beams or laser beams is installed on the main axis of the veneer lace. The maximum diameter detection means and the tool rest are movable in the radial direction.
The movement of the maximum diameter detection means and the movement of the tool post are synchronized so that they move toward or away from the main shaft by the same amount, and the maximum diameter detection means transmits a signal for detecting the maximum diameter of the log to the tool post. This means converting the turret from high-speed feed to step feed.

Hereinafter, an embodiment of the present invention will be described. In FIGS. 1 to 5, the tool rest 3 is connected to the main shaft 2 on the opposing surface 1a of one head stock 1 of the veneer race.
Attach the photoreceptor box 4 to the opposite position,
A support plate 8 is attached to the tip of a tool rest holder 7 that slides on guide surfaces 6, 6 provided horizontally between the headstock 1 and the other headstock 5, and an operating rod 12, which will be described later, is inserted into the center. A through hole 9 is drilled for this purpose, and a rectangular tube 11 into which medals 10, 10 are fitted is formed at both ends of the through hole 9, and this rectangular tube 11 is attached to the support plate 8. The actuating rod 12 has a male screw 13 formed at its tip, and the proximal end of the actuating rod 12 is slidably inserted into the through hole 9 of the rectangular tube 11, and a pin 14 is attached to the proximal end of the actuating rod 12. is attached in a direction perpendicular to the axis of the actuating rod 12, and a female screw cylinder 17 is formed in which a female screw 15 is provided on the inner circumferential surface of the bottomed cylinder and an annular groove 16 is provided on the outer circumferential surface. is screwed onto the tip of the actuating rod 12, and the female threaded cylinder 17 is fixed to the actuating rod 12 by tightening the bolt 18. A pair of piece-shaped spring support plates 19, 19 are connected to the operating rod 1.
2 and attached to the back surface of the support plate 8, and both ends of the tension springs 20, 20 are connected to the tips of the spring support plates 19, 19 and the actuating rod 11.
Both ends of the pin 13 attached to the base end of the pin 13 are engaged with each other.

Further, chain gear shaft support plates 22, 22 having a square shape for supporting the chain gear shafts 21, 21 were attached to both inner ends of the photoreceptor box 4, and a vertical plate portion 23 of the chain gear shaft support plate 22 was bored. The through hole 24 has a collar 2 in the center.
5, the chain gear shaft 2 is inserted into the chain gear shaft 2.
The male screw 26 formed at the end of the chain gear shaft 21 and the nut 27 are screwed together, and the chain gear shaft 21 is attached to the vertical plate part 23 of the chain gear shaft support plate 22 with the axis horizontal. A chain gear 29 is rotatably fitted through bearings 28, 28, and both chain gears 29, 2
A roller chain 30 is hung between 9. Also, roller chain 3
Two guide bars 31, 31 are installed horizontally and parallel to each other with a required spacing above the guide bars 31, 31, and bearings 32, 32 are attached to the guide bars 31, 31.
The photoreceptor mounting body 33 is slidably attached to the photoreceptor mounting body 33 through the
Attach 4. Also, the main axis 2 of the photoreceptor box 4
Attach a hanging plate 36 to the outer side plate 35,
A stopper bolt 37 is screwed into this hanging plate 36 so that it can move forward and backward.

Also, the bifurcated connecting tool 38 is fitted into the annular groove 16 of the female screw tube 17, and the projections 39, 39 provided on the upper part of the connecting tool 38 and the link 40 of the lower roller chain 30 are connected.
By connecting with the pin 41, the connecting tool 38
The chain 30 located below is connected to the tip of the actuating rod 12 via the chain 30 . On the other hand, a link 42 located symmetrically to the link 40 with respect to the midpoint of a line connecting the chain gear shafts 21 and 21 and protrusions 43 provided below the photoreceptor mounting body 33 are connected by a pin 44. As a result, the photoreceptor 34 is attached to the roller chain 30 located above via the photoreceptor mount 33.

When connecting the photoreceptor mounting body 33 and the roller chain 30, the length L ₁ from the axis of the main shaft 2 to the outer end of the photoreceptor 34 is determined when the female screw tube 17 is not in contact with the stopper bolt 37. is set slightly smaller than the length L ₂ from the axis of the spindle 2 to the tip of the blade 50. Now the roller chain 30
Through this, the movement of the photoreceptor 34 is synchronized with the movement of the tool post 3, so that the amount of movement of the photoreceptor 34 and the amount of movement of the tool post 3 become equal, and the directions of movement of the two become opposite to each other.

Further, an elongated light receiving window 46 is formed on the front plate 45 of the light receiving box 4. Opposing surface 5a of the other headstock 5
A light emitting body 47 of a phototube is mounted so as to face the light receiving body 34 .

In the figure, 48 is a chuck that supports the log 49, and 50 is a cutter attached to the tool rest 3.

In the above embodiment, the photoreceptor 34, which moves in the opposite direction by the same amount in synchronization with the movement of the tool post 3, constitutes the maximum diameter detection means of the log 49, but the attachment relationship between the photoreceptor 34 and the light emitter 47 The light emitting body may be used as the maximum diameter detection means by reversing the above.

Further, in the above embodiment, the roller chain 30 is used as a linear moving device in which the opposing moving parts move linearly by the same amount in opposite directions in synchronization with each other without slipping. They may be meshed in parallel.

(Operation of the invention) Next, the operation of the invention will be explained with reference to FIGS. 1 to 5. In the state shown in FIG. 4, the tool rest 3 with the cutter 50 attached thereto is moved at high speed, and the log 49 held between the chucks 48, 48 is
When the actuating rod 12 attached to the tip of the tool rest holder 7 moves in the direction of arrow P, the actuating rod 12 and the lower roller chain 30 are connected via the connector 38.
Since these are connected, as the actuating rod 12 moves in the direction of arrow P, the lower roller chain 30 also moves in the direction of arrow P. When the lower roller chain 30 moves in the direction of the arrow P, the photoreceptor mount 33 connected to the upper roller chain 30 slides on the guide bars 31, 31 in the direction of the arrow Q. The photoreceptor 34 attached to the top surface also moves in the direction of arrow Q. In the above operation, the amount of movement of the tool post 3 in the direction of arrow P is equal to the amount of movement of the photoreceptor 34 in the direction of arrow Q. Next, as the tool post 3 comes closer to the log 49, the photoreceptor 34 also comes closer to the log 49, and as shown by the solid line in FIGS. 5 and 3, due to the presence of the log 49, the photoreceptor 34 becomes unable to receive light from the light emitter 47, the maximum diameter of the log 49 is detected, and this signal is sent to the tool rest 3.
is transmitted, the feed of the tool post 3 is changed from high-speed feed to step feed, and cutting of the log 49 is started.

In addition, considering the braking distance of the tool post 3, the length _L1 from the axis of the main spindle 2 to the outer end of the photoreceptor 34 is slightly smaller than the length _L2 from the axis of the main spindle 2 to the tip of the cutter 50. is set to a small value, so there is no danger that cutting of the raw wood 49 will start while the tool rest 3 continues to be fed at high speed.

Next, as the log 49 is cut, the tool rest holder 7 gradually moves in the direction of arrow P, and the connecting tool 38
The link 40 of the roller chain 30 connected to the chain gear 2
9, the female threaded cylinder 17 screwed onto the tip of the actuating rod 12 comes into contact with the stopper bolt 37, and the actuating rod 12 is prevented from moving in the direction of arrow P and stops. tension spring 2
0 and 20, the rectangular tube 11 slides on the stopped actuating rod 12 and continues to move in the direction of arrow P.

Note that fine adjustment of the difference between the length L ₁ from the axis of the main shaft 2 to the outer end of the photoreceptor 34 and the length L ₂ from the axis of the main shaft 2 to the tip of the cutter 50 is performed at the tip of the actuating rod 12. This is done by rotating the female screw tube 17 screwed onto the actuating rod 12 and moving the female screw tube 17 forward and backward with respect to the actuating rod 12.

(Effects of the Invention) The present invention provides a means for detecting the maximum diameter of raw wood using a light beam or a laser beam, and a tool rest that detects the maximum diameter of the log so that the maximum diameter detection means and the tool rest move toward or away from each other by the same amount to the main axis. The movement of the detection means and the movement of the tool post are synchronized, and the maximum diameter detection means transmits a signal that detects the maximum diameter of the raw wood to the tool post to switch the tool post from high-speed feed to step feed. This eliminates the risk of starting cutting of the raw wood while feeding at high speed, making it extremely safe.Also, since the step feed amount during non-cutting can be made as small as possible, the non-cutting time can be shortened. Furthermore, since there is no danger of starting cutting of raw wood with high-speed feed, it is possible to automate the feed of the tool post continuously from high-speed feed to step feed, which improves the efficiency of cutting raw wood. is remarkable.

In addition, if the maximum diameter detection means of the phototube and laser receiver that constitute the light emitter and the photoreceptor are placed on the opposite side to the cutting side of the log, the cut pieces generated by cutting the log will come into contact with the phototube and the laser receiver. In addition, since there is no adhesion, failures of phototubes and laser receivers are extremely rare.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a sectional view taken along the line X--X of FIG. 1, FIG. 3 is a schematic plan view thereof, and FIGS. 4 and 5 are Both are diagrams for explaining the effects of the present invention. Explanation of numbers of main parts, 1, 5... Headstock, 2
...Main shaft, 3...Turret rest, 7...Turret rest holder, 3
0...Roller chain (linear movement device), 34... Photoreceptor of phototube (maximum diameter detection means), 47... Light emitter of phototube, 49... Log, 50... Cutler.

Claims (1)

[Scope of Claims] 1. A maximum diameter detection means for detecting the maximum diameter of raw wood using a light beam or a laser beam is made movable in the radial direction of the main axis of the veneer race, and the maximum diameter detection means and a tool rest are configured to The movement of the maximum diameter detection means and the movement of the tool post are simultaneously carried out so that they move toward or away from the main axis by the same amount, and the maximum diameter detection means transmits a signal for detecting the maximum diameter of the log to the tool post. A method for detecting a change in a tool post from high speed feed to step feed in a veneer race, characterized in that the tool post is changed from high speed feed to step feed. 2 At a position opposite to the cutting side of the raw wood with respect to the spindle on the opposing surface of one headstock, place a linear moving device in which opposing moving parts move linearly in opposite directions by the same amount in synchronization with each other, almost horizontally. A maximum diameter detection means consisting of a photoreceptor or a light emitter for detecting the maximum diameter of the log by receiving or emitting a light beam or a laser beam is attached to one moving part of the linear moving device, and the other The moving part and the tool rest holder that supports the tool rest are connected, and a light beam or laser beam emitter or light receiver is mounted on the opposing surface of the other headstock so as to face the maximum diameter detection means. A device for detecting the switching position of a turret from high-speed feed to walk feed in a veneer race, characterized by: 3. The device for detecting the switching position of a tool post from high-speed feed to foot feed in a veneer race according to claim 2, characterized in that a roller chain is used as the linear movement device. 4. The device for detecting the switching position of a tool rest from high-speed feed to foot feed in a veneer race according to claim 2, characterized in that a set of rack and pinion is used as the linear movement device.