JPH0448081B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for conveying a veneer veneer to an auto feeder of a multistage roll dryer.

Conventionally, a worker directly inserts multiple veneer veneers (hereinafter simply referred to as veneer) in parallel into the conveyor of an auto feeder that swings at a constant cycle, and the veneers are delivered to each stage of a multistage roll dryer. Was.

However, with the recent depletion of South Sea lumber, the number of long veneers obtained from low-grade logs has been decreasing, and as a result, the proportion of short sized veneers from which defective parts have been removed has increased. The length has become even shorter. Therefore, when an operator inserts these veneers into the auto feeder, the short veneers may be concentrated, or due to an accident, the intervals between adjacent veneers may become too close to each other within a predetermined period of time. In some cases, it was not possible to insert one load of veneer, and the veneer was fed into the multistage roll dryer in a state that was less than the one load described above, resulting in a decrease in the filling efficiency of the multistage roll dryer.

The present invention has been made in view of the above-mentioned disadvantages, and as a result, it is an object of the present invention to improve the filling efficiency of a multi-stage roll dryer.

The veneers of unspecified length are inserted into the feed conveyor at arbitrary intervals, and are assembled on the next stage traverse conveyor, and the veneers are placed side by side at a predetermined interval.
The veneers are cut at regular intervals by a pair of cutting devices and then conveyed in a direction perpendicular to the veneers, while the veneers remaining in the rear reversing device after each cut are transferred to the front reversing device and pooling device installed above the traverse conveyor. Veneers are stored on the conveyor, and when the interval between the veneers inserted into the feeding conveyor becomes larger than a predetermined value, the stored veneers are returned to the transverse conveyor from the front reversing device to replenish the veneers. This is the method of transport.

The present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a side layout diagram showing an embodiment of an apparatus for carrying out the method of the present invention. Reference numeral 1 denotes a feed conveyor to which detection devices PH ₁ and PH ₂ are attached. In particular, detection device PH ₁ constantly measures the distance between the veneers that are sequentially inserted.

2 is a cross conveyor driven by a drive device (not shown) consisting of a motor and a clutch brake, and is raised and lowered based on constant periodic signals from an auto feeder (not shown) connected to a discharge conveyor (described later). 3A and 3B are a pair of cutting devices installed oppositely with _a distance L corresponding to the auto feeder (not shown);
PH ₉ is a detection device, in particular, the detection device PH ₈ is mounted so as to be adjustable in the front and back direction, and in cooperation with the detection device PH ₂ of the inlet conveyor 1, the detection device PH 8 is attached to the transverse conveyor 2 and the rear reversing device 6. Control the drive intermittently. Reference numeral 5 denotes a carry-out conveyor consisting of a plurality of rollers, which is installed orthogonally to the lateral feed conveyor 2, and an auto feeder (not shown) is installed on the carry-out side.
are installed in succession.

Reference numeral 6 denotes a rear reversing device, in which belts 9 and 10 are connected to a plurality of pulleys 7 and 8 arranged in a U-shape and an inverted V-shape, and a guide member 1 whose one side is shaped like a horseshoe.
The conveyor 1 is stretched along the surface of the conveyor 1, and is connected to a drive device (not shown) which, like the traverse conveyor 2, comprises a motor and a clutch brake. PH ₇ is a detection device.

Following the rear reversing device 6, a pooling conveyor 15 consisting of a first endless belt 12, a second endless belt 13, and a third endless belt ₁₄ is provided above the cross-feeding conveyor 2 _{. 6} is a detection device.

Reference numeral 16 denotes a front reversing device constructed in substantially the same manner as the rear reversing device 6, and its input side is connected to the first endless belt 12, and its output side is connected to the traverse conveyor 2. PH ₈ is a detection device.

Next, its effect will be explained.

The veneers P ₁ , P ₂ , P 3 . . . of unspecified length are inserted into the feed conveyor 1 at arbitrary intervals as shown in Fig. ₃ .
First, the distance is measured by the detection device PH ₁ as described below. As a result, assuming that this interval is within a predetermined range, the preceding veneer P ₁ is detected by the next detection device PH ₂ , but at this time, the front reversing device 1
Regardless of whether the detection device PH ₃ of No. 6 is ON or OFF, the conveyor 2 is transported to the traverse conveyor 2 at the raised position shown by the solid line in FIG. 3. Then, when the detection device PH ₈ on the carry-in side detects the rear end of the preceding veneer P ₁ , the transverse feed conveyor 2 is activated.
A clutch brake (not shown) of the drive device of the rear reversing device 6 cuts off the drive of both, and the preceding veneer _P1 is temporarily stopped. Further, the veneer P ₂ following the feed conveyor 1 is carried into the transverse feed conveyor 2 which is activated again in response to a signal detected by the detection device PH ₂ located at the rear. Then, in the same way as above, the clutch brake (not shown) of the drive device of the cross feed conveyor ₂ and rear reversing device 6 cuts off the drive again based on the signal detected by the detection device PH ₈ at the rear end of the following veneer P 2. The veneer _P2 is temporarily stopped. Therefore, due to this intermittent drive of the traverse conveyor 2, the preceding veneer P ₁ and the following veneer P ₂ are
They are assembled in extremely close proximity. Thereafter, _the veneers P ₃ , _{P 4} . The drive of the rear reversing device 6 is synchronously controlled,
The rear reversing device 6 is temporarily stopped at the position shown in FIG. 4, for example, by a signal of a constant period. On the other hand, the veneers P ₈ and P ₉ on the feed conveyor 1 continue to be conveyed and when the detection device PH ₂ is turned on, the feed conveyor 1 is stopped and temporarily placed in a standby state.

During this time, the veneers P ₂ to _{P 7} on the traverse conveyor 2 are
After being cut at a predetermined interval L by the cutting devices 3A and 3B, the cross-feeding conveyor 2 is lowered to the position indicated by the two-dot chain line in the figure, and is carried out by the carrying-out conveyor 5 in a direction perpendicular to the carrying-out direction. A multi-stage roll dryer (not shown) is connected to an inlet conveyor (not shown) that swings at a constant cycle of
are sent to each stage.

On the other hand, the veneer P ₁ remaining in the rear reversing device 6,
For P ₂ ′ (remaining material from cutting P ₂ ), the detection device PH ₇ is turned on because the rear reversing device 6 is activated again after cutting by the cutting devices 3A and 3B. At this time, if the detection device PH ₆ of the third endless band 14 located at the front stage is OFF, the third endless band 14 is activated and the veneers P ₁ and P ₂ ' turn on the detection device PH ₆ . Similarly, under the condition that the preceding detection devices PH ₅ , PH ₄ , and PH ₃ are OFF,
The veneers P ₁ and P ₂ ' are sequentially conveyed from the two endless belts 13 to the front reversing device 16, and are temporarily placed in a standby state by a detection signal from the detection device PH ₃ , as shown in FIG.

Further, veneer P ₉ was carried to the traverse conveyor 2
~ _P15 is similarly cut to a predetermined length and then transported in a direction perpendicular to the cut. In addition, the veneers P ₇ ′, P ₈ , P ₉ ′ (remaining material from cutting P ₉ ) remaining in the rear reversing device 6 are sequentially removed from the rear reversing device 6, which is restarted after cutting by the cutting devices 3A and 3B. After being transported to the lower level, the first
It is detected by the detection device PH ₄ of the endless belt 12. However, at this time, since the detection device PH ₃ of the front reversing device 16 in the previous stage is turned on, the front reversing device 16
is not activated and the veneers P ₇ ', P ₈ and P ₉ are temporarily placed on standby on the first endless band 12 shown by the two-dot chain line in FIG. Thereafter, in the same manner, the veneer P remaining in the rear reversing device 6 each time it is cut is transported and stored sequentially from the second endless band 13 each time. As a result, in rare cases, a fully loaded state as shown in Fig. 7 occurs in which the veneer P is stored up to the rear reversing device 6, and all the detection devices PH ₃ to _{PH 7} are activated.
It may turn on.

In this case, the veneers Pa and Pb that are once on standby on the feed conveyor 1 and the veneers Pc and Pd... (not shown) that are subsequently inserted are transferred to the lateral conveyor 2.
After the material has risen to the position indicated by the two-dot chain line in the figure, the feed conveyor 1, traverse conveyor 2, and rear reversing device 6 are activated, thereby transporting the material to the next stage lateral conveyor 2 and bringing it into an assembled state. transported. And as described above, the detection device PH ₃ ~
When the preceding veneer Pa is detected by the detection device PH ₉ , which can only be detected when PH ₇ is all ON, these veneers Pa, Pb, Pc, Pd... It is cut by the cutting devices 3A and 3B and carried out toward the auto feeder in the right angle direction.

As already mentioned, the intervals between the veneers P that are sequentially conveyed to the feed conveyor 1 are constantly measured via the detection device PH ₁ . Under conditions where this interval is larger than a predetermined value, the front reversing device 1
The veneer P kept waiting after 6 is transferred to the transverse conveyor 2.
It can be returned to and refilled. This will be explained below.

A time T for starting the conveyance of the veneers P ₁ and P ₂ ' waiting in the front reversing device 16 of FIG. 5 to the transverse conveyor 2 is appropriately set in advance.

When the feed conveyor 1 is started, the detection device PH ₁ detects the rear end of the preceding veneer P ₁₆ and turns OFF, and then detects the front end of the following veneer P ₁₇ and turns ON. By detecting this, the interval between the veneers P inserted into the feed conveyor 1 is constantly measured. As a result, under the condition that the time t of the subsequent veneer P ₁₇ and the set time T are t>T, the veneers P ₁ , P ₂ ', on the front reversing device 16 and the first endless band 12
P ₇ ′, P ₈ , P ₉ ′ are the veneers preceding the feed conveyor 1.
After T ₁ hour after the rear end of P ₁₆ passes the detection device PH ₁ , turn off the next detection device PH ₂ . Next, based on the output signal of the set time T, the front reversing device 6 and the first endless band 12 are activated simultaneously, and the veneers P ₁ , P ₂ ′, P ₇ ′, P ₈ , and P ₉ ′ are , are returned to the lateral conveyor 2 as shown in FIG. 6, and are conveyed in an assembled state.

On the other hand, the veneer P ₁₇ being conveyed on the feed conveyor 1,
P ₁₈ ... is temporarily stopped when the preceding veneer P ₁₇ is detected by the rear detection device PH ₂ . and front inversion device 1
When the detection device PH ₃ of No. 6 detects the rear end of the veneer P 2 ' on its way back to the above-mentioned lateral feed conveyor 2, the feed conveyor 1 is started again and the waiting veneer P ₂ ' is detected.
P ₁₇ , P ₁₈ . . . are sequentially conveyed to the traverse conveyor 2. During this time, the veneer following the front inversion device 16
P ₇ ′, P ₈ , and P ₉ ′ are once again put into a standby state and transferred to the next traversal conveyor 2 in response to a signal that the front end of the veneer P ₇ ′ located in the front position is detected by the detection device PH ₃ . prepare for the return of

Note that although the pooling conveyor is constructed of an endless belt, it may be replaced with a roller conveyor.Furthermore, in this embodiment, the pooling conveyor is explained as being divided into three sections, but the present invention is not limited to this. Rather, it is determined as appropriate depending on the drying capacity of the multi-stage roll dryer, the dimensions of the veneer, etc. Further, the detection device refers to a phototube device according to the symbol PH, but it may also be a limit switch, a micro switch, or the like. Furthermore, the interval between veneers inserted into the feeding conveyor can be measured using a combination of the above-mentioned detection device with a timer, a pulse counter, or the like.

Since the present invention is configured as described above, the veneers of unspecified length inserted at arbitrary intervals are assembled on a traverse conveyor, and the veneers corresponding to one load of the auto feeder carry-in conveyor are assembled. After cutting the board, it can be carried out at right angles. On the other hand, if the insertion of the veneer into the feed conveyor is temporarily interrupted due to an accident, or if the veneer is temporarily shifted to one side, the operator may have to insert one load of the auto feeder. When the frequency is increased and it is not possible to insert this one load within a predetermined time, or the interval between adjacent veneers becomes larger than a predetermined value, the veneer is stored in the front reversing device and the pooling conveyor in advance. The veneers in a standby state can be returned to the transverse conveyor and replenished.
Therefore, according to the present invention, the veneers carried in are assembled on the transverse conveyor, the veneers for one load of the auto feeder are secured, and then the veneers are carried out to the auto feeder in the perpendicular direction. The filling efficiency of the type roll dryer can be significantly improved.

[Brief explanation of the drawing]

FIG. 1 is a schematic side layout view showing an example of an apparatus for carrying out the method of the present invention, FIG. 2 is a plan layout view of the same taken along arrow A-A in FIG. The figure is an explanatory diagram of the operation. 1...Feeding conveyor, 2...Horizontal feed conveyor, 3
A, 3B... Cutting device, 6... Rear reversing device, 12...
1st endless band, 13...2nd endless band, 14...3rd endless band, 15...pooling conveyor, 16...front reversing device.

Claims (1)

[Claims] 1. The veneer veneers of unspecified length are inserted into the incoming conveyor at arbitrary intervals, and are assembled on the next horizontal conveyor, and cut into uniform pieces by a pair of cutting devices installed in parallel at a predetermined interval. After cutting at intervals, the veneer is carried out in a direction perpendicular to the cut, and the veneer veneer remaining in the rear reversing device after each cut is stored in the front reversing device and pooling conveyor installed above the traverse conveyor. Additionally, when the interval between the veneer veneers inserted into the feeding conveyor becomes larger than a predetermined value, the stored veneer veneers are returned to the transverse conveyor from the front reversing device to be replenished. How to transport veneer veneer.