JPH0226569B2 - - Google Patents

Description

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

Conventional technology Conventionally, in the case of veneer processing equipment that overlaps veneers cut into predetermined lengths, the mutual positions and shapes of the veneers to be overlapped are accurately detected by respective detectors, etc., and then the veneers are overlapped. This is a configuration that performs control, and the veneers that are stacked have the characteristic that their shapes are extremely uneven due to cracks, curls, etc. that inevitably exist, so the disadvantage is that the veneers cannot be stacked reliably. It had

Although the above-mentioned drawbacks can be solved by diversifying the single-plate shape detection means and by sophisticated overlay control, the device itself has the disadvantage of increasing cost due to the complicated structure.

In order to solve the above-mentioned drawbacks, the present applicant has previously developed a ``veneer high-speed stacking device''
(Japanese Unexamined Patent Publication No. 56-89906)" and "Veneer Layering Apparatus (submitted on May 8, 1982)''.
Because the structure is designed to keep the difference in the transport process length in the transport path constant and overlap the cut veneers with each other,
It has been found that this method has the disadvantage of not being able to accommodate changes in the predetermined length of the cut veneer.

Purpose The present invention relates to an improvement of the above-mentioned "high-speed veneer stacking device" and "veneer stacking device", and uses a simple configuration to cut veneers to a predetermined length without changing the conveyance process length of the conveyance path. It is an object of the present invention to provide a veneer processing device that overlaps cut veneers with each other in response to changes in the veneer.

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

FIG. 1 is a schematic side view showing an outline of a veneer processing apparatus according to the present invention. a cutting discrimination device 3 which cuts the cut veneer S a every set predetermined length l ₁ to form a cut veneer S _a , and alternately discriminates the cut veneer S _a vertically by changing the direction of the cutting blade 2; connected to the cutting discrimination device 3 in upper and lower stages,
It is composed of first and second conveyor paths for conveying the discriminated cut veneer S _a from the start end 4 to the end end 5, respectively, and second conveyors 6 and 7.

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. It has an integral function of distributing and discriminating the cut veneer S _a into two upper and lower stages alternately.

Further, the first and second transport conveyors 6 and 7 have their starting ends 4 and terminating ends 5 located at the same location, and the respective transport process lengths from the starting end 4 to the terminating end 5 are arbitrary distances l ₂ , l ₃ , and the conveyance speed V ₁ of the first conveyor 6 is higher than the conveyance speed V ₂ of the second conveyor 7, so that the cut veneers S _a alternately conveyed at the end 5 positions overlap each other. It is variably driven in accordance with the predetermined length l1 so that the length _l1 is adjusted.

In other words, the conditions under which the cut veneers S _a that have been carried in alternately and separately at the starting end 4 are superimposed on each other at the terminal end 5 are such that, for example, the transporting process length l 2 of the first transporting conveyor ₆ is longer than the transporting process length of the second transporting conveyor 7. The conveyance speed of the first conveyor 6 must be an odd number multiple of the predetermined length _l1 compared to the length _l3 .
V ₁ is variably driven in comparison with the conveying speed V ₂ of the second conveyor 7 so as to obtain substantially the above-mentioned difference.

The cutting and discriminating device 3 and the first and second conveyors 6 and 7 are operated in conjunction with each other as follows.

First, when a desired predetermined length _l1 is selected by the changeover switch 8, the control circuit 9 calculates the veneer S length in response to the detection signal SS from the detector 10, and the counted value is set to the selected predetermined length. Each time the length l ₁ is reached, a drive signal DS ₁ is output to the cutting blade drive member 11, and the cutting blade 2 is rotated in one direction to perform cutting and form a cut veneer _{S a} having a predetermined length l ₁ .

In addition, if an error occurs in the predetermined length _l1 of each cut veneer when it is differentially conveyed to both conveyors 6 and 7, a correction counter is provided in the control circuit 9 and the main counter is corrected, or It is possible to prevent the above-mentioned error from occurring by providing a counter capable of counting a predetermined length of each cut veneer to be separated into both conveyance paths.

In addition, the control circuit 9 outputs a drive signal DS ₂ to the second drive member 12 in response to the detection signal SS, and drives the second conveyor 7 at a conveyance speed V ₂ while driving the first drive member 13, outputs a drive signal DS ₃ corresponding to the predetermined length l ₁ selected above, and compares the first conveyor 6 with the conveyance process length l 2 of the second conveyor 7 so that the length l ₂ is substantially selected. Conveyance is driven at a conveyance speed _V1 having a difference of an odd number multiple of the predetermined length _l1 .

In the above state, after conveying the cut veneer S _a1 by the first conveyor 6, and subsequently conveying the cut veneer S _a2 by the second conveyor 7, the first
Compared to the conveying speed V ₂ , the conveyor 6 substantially maintains the predetermined length l ₁ at each conveying process length l ₂ and l _{3 .}
The cut veneer _{S a1 ,}
S _a2 are superimposed on each other.

Further, when the predetermined length of the cut veneer S _a is switched to the predetermined length l ₁ ′ by the changeover switch 8, the control circuit 9 outputs the drive signal DS ₂ ′ to the first drive member 13 according to a preset program. Then, the first transport conveyor 6 is operated at a transport speed V _{1 ′} that has a difference between the transport process lengths l ₂ and l ₃ that is an odd multiple of the selected predetermined length l _{1 ′} with respect to the transport speed V 2 . The cut veneers S _a1 and S _a2 are overlapped with each other at five terminal positions by variable driving.

Therefore, in this embodiment, the cut veneer S _a is placed at the end 5 position in response to a change in the predetermined length without changing the transport process lengths l ₂ and l ₃ of the first and second transport conveyors 6 and 7. It is possible to overlap.

In addition, in this embodiment, the _first
The transport speed V ₁ of the transport conveyor 6 is driven variably, but the transport process lengths l ₂ and l ₃ of both transport conveyors 6 and 7 are substantially different from each other by an odd number multiple of the predetermined length l ₁ . There is no problem as long as the conveying speed V 1 _or V ₂ of at least one of the first and second conveyors 6 and 7 is variably driven in response to a change in the predetermined length l ₁ .

In addition, in this example, the cut veneer plates S _a were stacked one on top of the other with their edges in the conveyance direction coinciding, but
If necessary, stack the cut veneers so that the edges in the conveyance direction are shifted by an appropriate distance to clearly distinguish the stacked cut veneers from each other, making it easier to take out the cut veneers during the assembly process, etc. , even a configuration that speeds up the process can be implemented.

Furthermore, the present invention formally comprises a cutting device and a discrimination device, and after the cutting device cuts the veneer into predetermined lengths, the discrimination device separates the cut veneers into first and second pieces. It is also possible to implement a configuration in which the materials are transported separately to the transport path.

FIG. 2 shows an example of application of the present invention, in which the veneer S cut by the veneer race 14 is removed by the cutting discriminator 15 at the front and rear ends of narrow-width veneers ordered at the early stage of cutting and at the later stage. After the veneers S are suitably removed and made into sizing veneers, the narrow veneers S are carried into the cutting/discriminating device 16 constituting the present invention, with the veneers closely spaced from each other. The cutting discrimination device 16
is a continuous narrow-width veneer S or a continuous veneer S is cut every time it reaches a predetermined length l ₁ , and at least one of the above-mentioned cut veneers S _a corresponds to a change in the predetermined length. The one-piece cut veneer S _a is stacked by being carried into the first and second conveyance paths 17 and 18 _, which are driven variably at the conveyance speed, and superimposed on each other at the five terminal positions. 19, and if necessary, the cut veneer S _a ' having a narrow width is carried out to a stacker 20 and stacked.

In addition, in the case of a continuous veneer S to be cut in the middle stage of cutting, the cutting discrimination device 15 is not activated, and after the veneer S is cut into predetermined lengths by another cutting discrimination device 16, the first and second veneers are cut. The materials are transported to conveyance paths 17 and 18 in a differentiated manner.

Effects As explained above, the present invention has first and second conveyance paths having the same starting end and ending end, and is arranged at a position before the starting end, and cuts the veneer into predetermined lengths. A veneer comprising a cutting discrimination device that forms a board and alternately carries the cut veneers into the conveyance path, and stacks the cut veneers alternately conveyed into both conveyance paths in an appropriate state at a terminal position. In the processing apparatus, by configuring the conveyance speed of either of the two conveyance paths to be variable in order to correspond to changes in the predetermined length, many types of predetermined lengths can be made without changing the conveyance process length of the conveyance path. This is a veneer processing device that can overlap cut veneers made of.

[Brief explanation of drawings]

FIG. 1 is a schematic side view showing an outline of a veneer lamination device according to the present invention, and FIG. 2 is an explanatory diagram showing an application example of the present invention, in which 1 is a veneer processing device, and 3 is a cutting device. Discriminator, 4
is a starting end, 5 is a terminal end, 6 is a conveyor as a first conveyance path, 7 is a conveyor as a second conveyance path, l ₁ is a predetermined length, and V ₁ and V ₂ are conveyance speeds.

Claims (1)

[Scope of Claims] 1. A first and second conveyance path having the same starting end and ending end, and a cut veneer veneer provided by cutting a veneer veneer into predetermined lengths, the veneer veneer being cut into predetermined lengths. and a cutting discrimination device for discriminating and conveying the cut veneer veneers alternately to the both conveyance paths, and the cut veneer veneers alternately conveyed to the both conveyance paths to an appropriate state at a terminal position. A veneer veneer processing apparatus for overlapping plywood veneers, characterized in that the conveyance speed of at least one of the two conveyance paths is configured to be variable in order to correspond to a change in the predetermined length. .