JPS5854005B2 - Tanpan Setsudanouchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a veneer cutting device, and an object of the present invention is to provide an improved veneer cutting device that cuts veneers while conveying them and also sorts them at the same time.

The applicant of the present invention has previously published “Method and device for cutting veneer”
(Japanese Unexamined Patent Publication No. 50-38885), which discloses the following device.

That is, as shown in FIG. 1, for example, a thickness detection device consisting of a microswitch 6 connected to a roll 5 is mounted on a conveyor 4 placed on the input side of a pair of rotating rolls 2 and 3 that transport a veneer 1. A plurality of devices are provided at arbitrary intervals perpendicular to the veneer transport direction.

In the thickness detection device, when there is no veneer 1, the roll 5 is lowered and the microswitch 6 is turned on.
When the veneer 1 is transported and the roll 5 rises by a certain amount, it turns OFF, and when all the thickness detection devices are turned OFF, the circuit that issues the front edge cutting signal of the veneer and the thickness detection device are all OFF. A circuit is provided that issues a signal to cut the rear end of the veneer when even one of the following is turned ON.

On the unloading side of the rolls 2 and 3, a cutter holder 9 is provided on a rotating shaft 7 provided parallel to the rolls 2 and 3 and can be rotated at any angle by the operation of a cylinder 8.

A knife 10 is fixed to the knife holder 9, and the knife holder 9
The operation is performed by transmitting the cutting signal to the cylinder 8 via a timer, so that when the cutting position of the veneer 1 reaches the position of the blade 10, the cylinder 8 is activated and the blade 10 performs a turning movement. It is to make it.

Therefore, the veneer 1 is conveyed by the conveyor 4 and each roll 5 is pushed up, and all the microswitches 6 are turned off.
When F is reached, a signal to cut the front end of the veneer 1 is issued, and when the portion of the veneer 1 to be cut reaches the vicinity of the cutter 10 after a short period of time due to the action of the timer, as shown in Fig. 1. The knife 10, which has been waiting with its cutting edge in contact with the roll 2, turns as shown in FIG. 2 and cuts the front end of the veneer 1.

Furthermore, as is clear from the figure, at the same time as cutting, the conveyance path between the unnecessary part 1a of the veneer 1 and the veneer 1 is switched, the unnecessary part 1a of the veneer is dropped and removed, and only the effective veneer is left. It will then be transported to the rear.

In addition, when cutting the rear end of the veneer 1, if any one of the microswitches 6 is turned on and it is detected that the thickness of the veneer 1 is insufficient, the rear end cutting signal is activated. When the position of the veneer 1 to be cut reaches the vicinity of the blade 10 after a short time due to the action of the timer, the blade 10 rotates in the opposite direction to the front end cutting, and the veneer 1 is cut. At this moment, the conveyance path between the veneer 1 and the unnecessary part of the rear end is also switched,
Unnecessary parts at the rear end are also removed.

As mentioned above, the invention provided in JP-A No. 50-38885 is an epoch-making invention that simultaneously cuts the veneer while it is continuously conveyed and switches the conveyance path. It has been found that the device as shown has the following problems.

In other words, the cutting edge of the blade tends to be in strong contact with the circumferential surface of the roll during standby, especially immediately after cutting, and wear out little by little. Since the angle of contact is gentler, when cutting after the blade has become somewhat worn, the part immediately behind the blade comes into contact with the surface of the veneer first, and with hard veneer, the edge of the blade will not corrode. There is a problem that cutting cannot be performed without cutting the device, and the need to frequently replace the blade is a factor that significantly impedes the practical use of the device.

The present invention solves the above problem by changing the position of the blade during cutting and when waiting for cutting, and will be described in detail below with reference to Examples.

As shown in FIG. 3, a conveyor 4 is arranged in line with the loading of iron rotating rolls 2 and 3 that convey the veneer 1, and on the conveyor 4 there is a Similarly, a plurality of microswitches 5 and 6 are used as thickness detection devices.

A cut signal generation and timing device from the thickness sensing device is also provided.

On the unloading side of the rolls 2 and 3, there is an axis A parallel to the rolls 2 and 3.
A rotary cylinder 11 is connected to the end of the shaft A as shown in FIG.

As shown in FIG. 8, the cross section of the rotary cylinder 11 along the straight line XY has two air inlet and outlet ports 11a and 11b, each of which is connected to a solenoid valve (not shown).

That is, the electromagnetic valve is activated when a cutting signal from the thickness detection device arrives, and compressed air is fed into the rotary cylinder 11 from one port, for example, 11a, and the other port 11b is opened. The child 11c and the shaft 11d pivot, and at the same time the shaft A connected to the shaft 11d is also pivoted.

A cutter holder 12 having a groove is fixed to the axis A, and a plurality of springs 13 are arranged at arbitrary intervals in the groove of the cutter holder 12 in a direction perpendicular to the veneer traveling direction, and the cutler 10 is attached thereto. By applying an external force to 10,
The cutter 10 is provided so as to be able to move in substantially the same direction as the veneer traveling direction.

For example, the present invention is provided as described above, and its operation is as follows.

As shown in FIG. 3, when the rolls 2, 3 and the conveyor 4 are driven and the veneer 1 is conveyed by the conveyor 4 with the cutter 10 in contact with the circumferential surface of the roll 2, the roll 5 of the thickness detection device
is applied to push up the roll 5, and when all the thickness sensing devices detect that a certain thickness has been reached, a front end cutting signal is issued.

The cutting signal is transmitted so that the electromagnetic valve is activated when the detected position at which the veneer 1 is to be cut reaches the vicinity of the tip of the blade 10 after an arbitrary minute time due to the action of the timer.

Therefore, compressed air is sent from the opening 11a of the rotary cylinder 11, and the other opening 11b is opened, and the shaft 11
As d rotates, the blade holder 712 also rotates.

At this time, since the blade 10 presses the veneer 1 against the roll 3, a frictional force acts from the veneer 1 to the blade 10, and as shown in FIG. 4, the spring 13 contracts and the blade 10 moves in the direction of the arrow. It becomes a backward state.

Therefore, compared to the state before retreating, the state in which the blade 10 acts on the veneer 1 is such that the blade edge is in stronger contact with the veneer 1, and good cutting is performed.

After cutting, as shown in FIG. 5, the conveyance path of the veneer 1 and the unnecessary portion 1a is switched by the cutter 10 and they advance respectively, while the cutter 10 comes into contact with the roll 3. Since the roll 3 is made of iron and generates dynamic friction, the coefficient of friction is smaller than that of a veneer, and due to the action of the spring 13, the veneer moves in the opposite direction to the traveling direction of the veneer, and in the state shown in Fig. 6. You will have to wait.

Therefore, only the cutting edge of the cutting tool 10 does not come into contact with the roll 3 and wear out, but rather the part immediately behind the cutting edge is polished, the cutting edge is always sharp, and the life of the cutting tool 10 is greatly increased.

Next, when the rear end cutting signal is issued, the opening 11a of the rotary cylinder 11 becomes open after a short period of time, and the other opening 11
Compressed air is sent from b, the cutter 10 rotates upward,
As in the case of cutting the front end, the blade 10 moves backward to cut the veneer 1, and after cutting, the blade moves forward and stands by.

At this time, the conveyance path between the veneer 1 and the unnecessary portion at the rear end is switched, as in the case of cutting the front end.

As shown in the embodiments above, the present invention is capable of reducing the angle between the blade and the conveying body when the blade cuts the veneer and when the blade is in contact with a conveying body such as a roll and waiting to cut. As a result, when cutting, the blade edge is in stronger contact with the veneer, and a good cut is made without slipping between the blade and the veneer, and when the blade is waiting to cut, This is very rational because the part immediately behind the cutting edge is polished and the cutting edge is always kept sharp.

Furthermore, since the cutting process is performed by using the veneer to be cut without requiring any special equipment for moving the blade, the equipment can be extremely simplified.

In addition, when the device of the present invention is used to cut a continuous sheet-like veneer into pieces of a certain length, a limit switch is provided at a predetermined distance position on the lower side of the cutter, and a limit switch is provided at an arbitrary fixed distance position on the lower side of the cutter to cut the veneer every time the veneer hits the cutter. Alternatively, a cutting signal may be issued to activate the cutter.

On the other hand, when feeding compressed air into the rotating cylinder when cutting veneer, a timer may be used to feed compressed air only during cutting, and reduce the pressure of the compressed air while waiting after cutting. be.

Further, in the embodiment described above, the cutter is mounted on the rotatable cutter holder via a spring, but as shown in FIG. It may be inserted and both ends 14, 15 supported by springs 16 to be movable in the slide guide.

As described above, the present invention not only allows the veneer to be cut rationally without stopping the veneer being transported, and also separates and eliminates unnecessary cut parts by switching the transport path, but also greatly extends the life of the cutter. Therefore, the present invention makes a great contribution to industry.

[Brief explanation of drawings]

1 and 2 are explanatory diagrams of a conventional device, FIG. 3 is a surface measurement diagram of an embodiment of the present invention, and FIGS. 4, 5, and 6 are partially enlarged explanatory diagrams of FIG. 7 is a partial plan view of FIG. 3, FIG. 8 is a sectional view taken along the XY axis of FIG. 7, and FIG. 9 is a partial side view of another embodiment of the present invention. 1... Single board, 2, 3... Roll, 6.
...Micro switch, 10...Knife,
11... Rotating cylinder, 12... Blade holder, 13... Spring.

Claims (1)

[Scope of Claims] 1. Each time a cutting signal from a veneer cutting position detection device reaches the unloading side of a veneer conveyor provided on both the front and back sides of the veneer, the veneer conveyor is rotated at an arbitrary angle about the rotation axis, In a veneer cutting device in which a blade connected to an intermittent drive device is arranged so that the blade edge alternately approaches or contacts the exit side circumferential surface of the conveyor, an elastic body such as a spring is interposed in the support of the blade. A veneer cutting device characterized in that the blade is capable of moving forward and backward in substantially the same direction as the direction in which the veneer travels. 2 Every time a cutting signal from the veneer cutting position detection device reaches the unloading side of the veneer conveyor provided on both the front and back sides of the veneer, the veneer rotates at an arbitrary angle around the rotation axis so that the cutting edge of the veneer is aligned with the conveyor. In a veneer cutting device in which a blade connected to an intermittent drive device is arranged so as to alternately approach or contact the outlet side circumferential surface, the blade is supported so as to be movable in substantially the same direction as the veneer traveling direction, and An elastic body such as a spring is interposed between the blade holder, which rotates at any angle about the rotation axis, and the blade, so that the blade can move forward and backward in substantially the same direction as the veneer traveling direction. Characteristic veneer cutting equipment.