JPH0341321B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a veneer stacking device that stacks and transports veneer veneers (hereinafter referred to as veneers) cut into predetermined lengths.

Conventionally, for example, as shown in Japanese Utility Model Publication No. 51-24075, a front end detector was placed on the lower side in the transport direction above the stacking table, and a rear end detector was installed on the upper side in the transport direction on a single transport path. By sequentially switching the front end detector and the rear end detector and releasing the holding of the front end or the rear end of the veneer by the transport conveyor based on the veneer detection signal output from each, A known veneer stacking device is known in which the veneers are stacked while being shifted by a predetermined distance in the transport direction.

However, when a detector is used to determine the position where the veneer is released from holding by the conveyor, and therefore the position where it falls, as in the conventional device described above,
It has the following drawbacks. In other words, the veneer itself that is dropped may have cracks at its front or rear end, or its elastic modulus may vary depending on the outer circumferential position of the wood, so the amount of flexure may not be constant. There is.

When veneers having such characteristics are deposited on a stacking table using the above-mentioned stacking device, there is a fatal drawback that the detection of the veneers by the detector is not constant. When the veneers whose falling positions have been detected by the detector in this manner are stacked on top of each other, there is a problem in that the veneers cannot be overlapped by shifting each other with high accuracy in the transport direction.

Purpose The present invention was invented to solve the above-mentioned conventional drawbacks, and its purpose is to move veneers of a predetermined length to each other in the transport direction without using a detector. To provide a veneer stacking device capable of stacking veneers by accurately shifting them by a predetermined distance toward the side and the lower side.

Example The present invention will be described below with reference to Examples.

FIG. 1 is a schematic side view showing the outline of a veneer stacking device according to the present invention, in which the veneer stacking device 1 cuts a continuous veneer S by cutting it in a preset manner with a cutting blade 2. A cutting discrimination device 3 that cuts every predetermined length _l1 to form a cut veneer Sa and alternately discriminates the cut veneer Sa vertically by changing the direction of the cutting blade 2; It is comprised of first and second conveyors 4 and 5, which serve as conveyance paths connected in upper and lower stages.

The configuration of the cutting discrimination device 3 is described in detail in Japanese Patent Publication No. 54-35358, which was previously filed by the present applicant.
In addition, the second transport conveyors 4 and 5 have an integral function of discrimination.

In addition, the first and second conveyors 4, 5
are rotationally driven in synchronization, and the starting ends 6 and terminal ends 7 of the first and second transport conveyors 4 and 5 are arranged at the same location, and the transport process length of the first transport conveyor 4 is l ₂ is l ₂ = (l ₃ ±nl ₁ ) ±α l ₁ ≫ α (l ₃ is the transport process length of the second transport conveyor, n is an arbitrary odd number, α is an appropriate distance, and the cut veneer Sa is (There is no problem as long as the distance is such that the two can be distinguished when they are overlapped.)

The cutting and discriminating device 3 and the first and second conveyors 4 and 5 are operated in conjunction with each other as follows.

First, in order to cut the veneer S into predetermined lengths _l1 , the control circuit 8 calculates the length of the veneer S based on the detection signal SS from the detector 9, and the count value is set in advance. Every time the predetermined length _l1 is reached, a drive signal _DS1 is output to the cutting blade drive member 10, and the cutting blade 2 is rotated in one direction to form a cut veneer Sa having a predetermined length _l1 .

On the other hand, the control circuit 8 outputs the drive signal DS ₂ in response to the detection signal SS to drive the single drive mechanism 11.
The first and second conveyors 4 and 5 are driven synchronously by ON-OFF operation.

In the above state, first the cut veneer Sa ₁ is conveyed by the first conveyor 4, and then the cut veneer Sa ₂ is conveyed by the second conveyor 5, but the cut veneer Sa ₁ is Compared to the cut veneer Sa ₂ , the terminal end 7 is transported in a detour based on the above relational expression.
At the location, the cut veneers Sa ₁ and Sa ₂ are overlapped with each other with an appropriate distance α shifted from each other.

Therefore, in this example, the veneer is cut at seven points at the end.
Since the Sas are overlapped with each other at an appropriate distance α, the cut veneer Sas can be clearly distinguished from each other.
For example, cutting veneer Sa in the later process of the structure process
The removal work can be made smoother and faster.

In this embodiment, the cutting and discriminating device is configured to integrally have the function of cutting the veneer and simultaneously discriminating the cut veneer into the first and second conveyance paths.
The present invention formally comprises a cutting device and a discrimination device, and after the cutting device cuts the veneer at predetermined intervals, the discrimination device transfers the cut veneer to the first and second conveyance paths. It is also possible to carry out a configuration in which the materials are imported separately.

Further, FIG. 2 shows an example of application of the present invention, in which the veneer S cut by the veneer race 12 is detected by the cutting discrimination device 13 to detect the front and rear ends of the narrow veneer that occur in the early and later stages of cutting. After the unnecessary portions of the veneers are appropriately removed and the veneers are made into sized veneers, the narrow veneers S are conveyed to the cutting and discriminating device 14 of the present invention while being closely spaced between the veneers. The cutting discrimination device 14 cuts the continuous narrow-width veneer S every time it reaches a predetermined length _l1 , and divides the cut veneer Sa into the first and second conveying process lengths according to the above-mentioned relational formula. The materials are transported separately to the transport paths 15 and 16.

One of the cut veneers Sa brought in is the same as the other cut veneer Sa.
Since the cut veneer plates Sa are transported in a detour compared to the veneer Sa, the cut veneers Sa are stacked on top of each other with an appropriate distance α shifted from each other at seven positions at the end thereof, and are transported to the stacker 17.

Note that the cutting discrimination device 13 is not activated in the case of a continuous veneer S to be cut in the middle stage of cutting, and after the cutting discrimination device 14 cuts the continuous veneer S into predetermined lengths, the first and second veneers are cut. The materials are transported to transport paths 15 and 16 in a differentiated manner.
Also, if necessary, cut veneer made of narrow veneer.
Sa to the stacker 1 installed in parallel to the stacker 17
8, it is possible to differentially deposit one-piece cut veneers and narrow-width cut veneers.

Effects As explained above, the present invention is a single unit that can overlap veneers of a predetermined length carried in and shifted by a predetermined distance to the upper and lower sides in the conveyance direction with high accuracy without using a detector. A board stacking device can be provided.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view showing an outline of a veneer stacking device according to the present invention, and FIG. 2 is a schematic side view showing an application example of the present invention. In the figure, 1 is a veneer stacking device, 3 is a cutting discrimination device, 4 is a conveyor as a first conveyance path, 5 is a conveyor as a second conveyance path, 6 is a starting end, 7 is an end, _l1 is a predetermined length,
l ₂ and l ₃ are the transport process length, α is the appropriate distance, S is the veneer,
Sa is cut veneer.

Claims (1)

[Scope of Claims] 1. First and second conveyance paths having the same starting end and ending end and driven synchronously, arranged at a position before the starting end, and transporting the veneer veneer every predetermined length. In a stacking apparatus comprising a cutting and discriminating device that cuts the veneer veneers to form cut veneer veneers and alternately carries the cut veneer veneers to the conveyance path, the two conveyance paths have a length corresponding to the conveyance process. The veneer veneers are arranged with a difference, and the difference is a distance obtained by adding or subtracting an appropriate distance from an odd multiple of the predetermined length, and at the end, the veneer veneer is carried out from the first and second conveyance paths. A veneer veneer stacking apparatus characterized in that the veneer veneer stacking apparatus sequentially stacks the veneer veneers with the appropriate distances shifted from each other.