JPS6136327Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a veneer veneer winding synchronization device for a veneer lace, and in particular, a non-contact position detector that detects the behavior of the veneer veneer between the blade of the veneer lace and the winding roll. The present invention relates to a veneer veneer winding synchronization device for a veneer race, which uses detection to synchronize the cutting speed and winding speed of the veneer veneer.

The veneer veneer cut by the rotary type veneer race is immediately placed on a winding conveyor, conveyed, and wound up by a winding reel into a rolled ball. At this time, the winding speed of the take-up reel must be synchronized with the cutting speed of the veneer lace. If synchronization is not achieved, the veneer veneer may loosen between the veneer lace and the take-up reel, or
Or, conversely, it may be pulled too much.

Therefore, in order to detect whether or not this synchronization is achieved, conventional operators visually observe the winding status and perform speed-up/deceleration operations, or a contact-type detector is installed on the surface of the veneer veneer while it is running. Synchronization was achieved by detecting the pressure acting on the contacts.

However, in conventional detectors of this type, when the winding speed of the take-up reel suddenly increases, there is a high risk that the veneer veneer will be pulled too much and the contacts of the detector will be damaged. . In addition, if the thickness of the veneer veneer is thin and the winding speed with the take-up reel becomes high and the tension becomes excessively large, the veneer veneer may be torn, or conversely, the veneer may be torn due to When the winding speed was lower than the cutting speed of the veneer lace, there was a problem that the veneer veneer would be folded.

The present invention solves these problems and provides a veneer lace that can synchronize the cutting speed of the veneer lace and the winding speed of the take-up reel without directly contacting the veneer veneer fed from the veneer lace. The present invention aims to provide a veneer veneer winding tuning device.

The veneer veneer winding synchronization device of the present invention is a device that synchronizes the cutting speed of a veneer veneer cut from a raw wood log with the winding speed of a take-up reel that winds this veneer veneer downstream. A non-contact position detector is placed in the space above the veneer veneer on the path to detect the vertical position of the veneer, a winding device that winds up the veneer veneer, and a winding device that responds to the output signal of the detector. The winding device is characterized by comprising a control device that controls the rotation of the winding device.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the veneer veneer winding and tuning device of the present invention shown in the drawings will be described below.

In FIG. 1, reference numeral 1 indicates a log, and the log 1 is rotated in the direction of arrow A with its axial ends held between chucks (not shown). There is.

This raw wood log 1 is designed to be cut by a cutting blade 2, and the cutting blade 2 is supported by a cannon 3 so as to give a predetermined cutting angle.

The gun turret 3 has a hollow triangular cross section, and an inclined upper surface 3a thereof is a sliding surface of a cut plywood veneer P.

A pressure bar 4 that presses the log 1 is placed above the cutting edge of the cutting blade 2 in order to suppress tip cracking that occurs when cutting the log 1 with the cutting blade 2 and to regulate the thickness.
This pressure bar 4 is held by a pressure bar body 5 and further tightened and fixed by a pressure bar retainer 6.

On the other hand, below the gun turret 3, a carry-out conveyor 7 is installed in a substantially horizontal direction from below the cutting blade 2 to almost an extension of the inclined surface 3a passing under the gun turret 3. is pulley 8
and 9, and an endless conveyor belt 10 suspended in parallel to these pulleys, with the upper side of the conveyor belt 10 running in the direction of arrow B.

The cutting waste that fell below the cutting tool 2 and the cutting waste that fell along the inclined surface 3a of the gun turret 3 are
It is carried out in the direction of arrow B by this carrying-out conveyor 7, and is dropped into a horse conveyor (not shown).

Furthermore, a winding conveyor 11 is arranged on an extension of the carrying out conveyor 7, and this winding conveyor 1
1 is constituted by an endless conveyor 13 that has a conveyance surface that is at the same level as the above-mentioned carry-out conveyor 7 or slightly inclined from the same level, and that is hung in parallel between the pulleys 9 and 12. .

A take-up reel 14 is loaded on the exit side of the take-up conveyor 11 so as to be movable in the vertical direction, and can move up and down depending on the amount of winding of the veneer p. Reference numeral 15 in the figure indicates a drive roll, and this drive roll 15 is pressed against the veneer veneer p to be wound on the take-up reel 14, and acts to wind this on the take-up reel 14. Further, the circumferential speed of this drive roll 15 is completely synchronized in accordance with the speed change of cutting the veneer lace veneer.

Further, the speed of the conveyor belt 10 is preferably slightly faster than the synchronized speed, since a slip phenomenon occurs between the conveyor belt 10 and the veneer veneer p being carried out.

With this structure, when the cutting blade 2 is sent radially inward on the circumference of the log 1 that is being rotated, the veneer veneer p is cut, and the veneer veneer p is cut against the surface of the turret 3. 3a, and is sent along the upper surface of the carry-out conveyor 10, as shown by the solid line, and is sent in the direction C by the take-up conveyor 11.

When the tip of the veneer veneer p is fixed on the reel shaft of the take-up reel 14 and the drive roll 15 is brought into pressure contact and driven, the veneer veneer p is sequentially wound around the take-up reel 14. During this time, if the cutting speed of the veneer veneer and the winding speed of the take-up reel 14 are synchronized, the conveyance path of the veneer veneer p will be approximately constant. However, if the synchronization is lost, the veneer veneer p is displaced in the vertical direction in the area where it moves from the inclined surface 3a of the turret 3 to the take-up conveyor 11.

Therefore, in the present invention, a non-contact type position detector 16 is installed in the space above this area. As the position detector 16, an optical non-contact switch such as a known reflective phototube or an image sensor is suitable. Examples of such image sensors include Line Switch TL-500 and TL-1000 (all product names) manufactured by Takenaka System Equipment Co., Ltd., and OMRON Video Inspector Type 3X manufactured by Tateishi Electric Co., Ltd.
There are 2C-B (product name) etc.

A detection signal from the position detector 16 is input to a control device 18 via a signal line 17, and an output signal from the control device 18 is transmitted to a drive motor 20 of the drive roll 15 via an output line 19. .

Next, the operation of the present invention when an image sensor is used as the position detector 16 will be explained.

There are two types of image sensors: a type that places a light source above the plywood veneer to receive the reflected light, and a type that places a line light source across the plywood veneer at right angles to the conveying direction of the veneer. Any type that directly receives irradiated light can be used.

In the apparatus shown in FIG. 1, when the cutting speed of the veneer veneer p by the cutting blade 2 and the winding speed by the drive roll 15 are synchronized, the veneer veneer p is moved to the turret 3 as indicated by the symbol q. is stretched from the inclined surface 3a of the conveyor 7 to the entrance end of the delivery conveyor 7. However, when the synchronization is lost and the winding speed becomes slower, the winding speed decreases as shown by the symbol r, and conversely, the winding speed becomes lower than the winding speed. As it becomes faster, it starts to rise as shown by the symbol s.

When the veneer veneer p rises or descends from the proper position in this way, as shown _in FIG _. have a relationship of θ ₁ >θ>θ ₂ with respect to the viewing angle θ at the appropriate position. Therefore, when the position detection device 16 detects both side edges of the veneer p and the measured viewing angle exceeds a certain value, the winding speed of the veneer p by the drive roll 15 is reduced, and conversely, the winding speed of the veneer p is kept constant. By controlling the speed to be increased when the speed is below the value, it is possible to synchronize the cutting speed and winding speed of the veneer veneer p.

Although the above is an example in which an image sensor is used as the position detection device, a non-contact position detector using a reflective phototube may also be used.

As is clear from the above explanation, according to the present invention, the synchronous relationship between the speed of the veneer veneer immediately after being cut by the cutting tool of the veneer lace and the circumferential speed of the drive roll of the take-up reel can be established in a non-contact manner. Since the position detector is used for detection, the surface of the veneer veneer will not be damaged by the detector, or the detector will not be destroyed by excessive tension on the veneer veneer. Tuning relationships can be detected and controlled.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view for explaining a veneer lace veneer winding and tuning device according to the present invention, and FIG. 2 is a sectional view taken along the line - in FIG. 1... Log log, 2... Cutting knife, 3... Cannon turret, 7... Unloading conveyor, 11... Winding conveyor, 14... Winding reel, 15... Drive roll, 16... Non-contact position Detector, 18...control device.

Claims (1)

[Claims for Utility Model Registration] 1. In a device that synchronizes the cutting speed of a veneer veneer cut from a raw log with the winding speed of a take-up reel that winds this veneer veneer downstream, A non-contact position detector that is placed in the space above the veneer veneer to detect the vertical position of the veneer, a winding device that winds up the veneer, and a winding device that winds up the veneer in response to the output signal of the detector. A veneer veneer winding tuning device comprising: a control device for controlling the rotation of the device. 2 Claim No. 1 for Utility Model Registration characterized in that the non-contact position detector is an image sensor
The veneer veneer winding tuning device described in Section 1. 3. Registration of a utility model characterized in that the winding device consists of a take-up reel for winding the veneer veneer, and a drive roll that is pressed against the veneer veneer wound on the take-up reel and winds the veneer veneer. A veneer veneer winding tuning device according to claim 1 or 2.