JPH0822711B2 - Deposition single-plate deposition equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to the deposition of veneers, which are raw materials for plywood products, obtained by turning from raw wood, and among the veneers, are produced at the initial stage of cutting raw wood, The present invention relates to a so-called dimensional veneer deposition apparatus having a nonuniform length and a short length.

[Conventional technology]

As a technique for depositing size veneers, there is a device used in Japanese Patent Publication No. 54-42506, "Method for depositing size veneer veneers". This equipment places the veneers on two intermittently driven conveyors and conveys them in the orthogonal direction of the veneer fibers one after another while packing them in close contact with each other, and conveys the veneer group at a predetermined integrated length above the deposition site. To be transferred to.

Then, after arriving at the position, the transportation is stopped, and the central portion in the width direction of the veneer is pushed down by the pressing body over all the sized veneers (a series of veneer group) in the direction orthogonal to the veneer fibers. The group is bent, and the transport bodies that have supported the lower surface of the veneer are rapidly separated right and left and are loaded on the lifter waiting downward.

[Problems to be solved by the invention]

Although veneer is cut and produced from raw wood, it has the property of curving due to back cracking during cutting, and the tendency is stronger for short veneers. Even for short veneers of the same size, curl The degree is different. Due to such a single-plate property, the following defects occur in the conventional deposition apparatus.

1. Depending on the degree of curl of each short veneer, the piles may have heights that are partly disturbed, and the stacking height may not be too high.

2. Multiple short veneers are packed closely and closely, so the transport speed cannot be too high.

3. Short-sized veneers are often gathered together after trimming the total length, for example, to a predetermined integrated size of 2 m, etc., so the veneer at the final end is often cut into very small and short pieces. Since it is short after loading, it is often uncomfortable and often falls off.
Therefore, the piles are in a form in which the front and rear ends hang down,
I can't stack it too high.

The present invention seeks to overcome these problems.

[Means for solving problems]

The present invention is characterized by having the following configuration in order to solve the above problems.

1. A lifter that can lift and lower a single plate.

2. It consists of two endless conveyor belts, which are arranged at a certain interval and are stacked and accumulated in a roughly predetermined length, and convey them in the direction orthogonal to the fiber. Transport conveyor.

3. It is installed above the conveyor and contacts the top surface of the veneer.
A holding conveyor that transports veneers in collaboration with a conveyor.

4. Over the entire length of the veneer to be loaded, or appropriately divided in the veneer length direction, along the veneer transport path formed by the conveyor, left and right elastically held slightly above it. Fixed strip bar.

5. It is placed facing the fixed bar up and down with the veneer transportation path in between, and is appropriately divided in the length direction of the veneer to be loaded. A strip-shaped lifting bar that can be lifted and lowered.

[Action]

When accumulating short sized veneers in a predetermined length,
It is a good idea to stack it as efficiently as possible. In order to stack it high, it is desirable that the tops of the piles be horizontal, one after another, but it was extremely difficult to stack only short strips with a lot of habit.

According to the aspect of the present invention, strip plate-shaped bars are arranged above and below a conveyance path surface for transferring a sized veneer. For example, when the rear end of the pile is about to become low, After loading the plate, quickly start the elevating bar at the rear end position to sandwich the single plate of the part and lift it from the transport road surface, and appropriately detect the arrival of the leading end of the deposition position of the preceding sized single plate using a detector such as a photoelectric tube. The upper and lower conveyors for veneer transportation are stopped.

When the veneer transportation is interrupted due to the stop of the conveyor, the elevating bar holding the veneer immediately descends to the old position and releases the veneer, so the veneer is temporarily placed on the transport conveyor, and the continuous 2 The strip conveyor rapidly separates to the left and right and falls down together with the other sized veneers, which will definitely be mounted at the partially lower rear end of the lifter pile.

That is, the sized veneer sandwiched by the upper and lower bars is
In accordance with a series of operations of floating the conveyor and not enjoying the effect of being conveyed forward by the conveyor, and thereafter stopping the conveying conveyor-releasing the sandwiched veneer-opening / closing the conveyor, the veneer is guaranteed to be loaded at the sandwiched position. Is done. Therefore, by operating the elevating bar at the lower part of the pile in a timely manner, it becomes possible to arbitrarily correct the size of single-plate loading on the lifter, and the loading height can be increased. .

In addition, since the drooping of the rear end of the pile is generally conspicuous, it is sufficient to provide the upper and lower fixing bars and the elevating bar only at the rear end. In addition to constantly maintaining the upper surface of the pile, the stack is intentionally replenished so that the intermediate part of the veneer conveying direction (longitudinal direction of the integrated sized veneer) is dented, and the dented veneer is appropriately replenished in the recess. The way to stack is also practical.

〔Example〕

The drawings show one embodiment of the present invention. FIG. 1 is a side view and FIG. 2 is a front view. In the figure, reference numeral 2 is a lifter, which is capable of moving up and down by successively depositing veneers on its upper surface. Reference numeral 3 is a conveyer conveyor, which is usually located above the lifter 2 above the veneer stacking position.
As shown in the figure, one strip each is arranged on the left and right in the width direction of the transport veneer, and the veneer is placed and transported in the direction of arrow A in the direction orthogonal to the veneer fiber.

Further, the transfer conveyor 3 is rapidly opened and closed in parallel with the pulleys 3A and 3B at the front and rear ends by the opening and closing mechanism such as a fluid cylinder (not shown) to the left and right in the single plate width direction of the arrow B direction shown in FIG. It is operable, and the single plate group placed on the conveyor is dropped and accumulated on the lower lifter upper surface. 3G is a belt guide of the conveyer 3 and is made of appropriately shaped steel or the like over substantially the entire length of the conveyer, and is opened / closed in the left-right direction integrally with the conveyer.

Reference numeral 4 is a holding conveyor, which is arranged above the conveyor 3 in correspondence with the conveyor 3 and is brought into sliding contact with the upper surface of the conveyed single plate to transfer the single plate in the direction of arrow A in cooperation with the conveyor 3. is there. The holding conveyor 4 does not require opening / closing operation, and the opening / closing operation of the carrying conveyor 3 may be performed by swinging with the upper side as a fulcrum other than the above-mentioned parallel movement, and the upper surface of the carrying conveyor 3 and the lower surface of the holding conveyor 4 carry a single plate. The road surface R is constructed.

Reference numeral 13 is an elevating bar, which is usually a strip of iron having a narrow width, as shown in FIG. 2, near the left and right edges of the veneer transferred to the conveyor 3 in a mounted state, and parallel to the conveyance road surface R. It is arranged below it, and is further mounted by a fluid cylinder or the like via a lifting mechanism 16 so that it can be lifted and lowered freely on a fixed machine frame. In the case of the illustrated embodiment, an example in which the belt guide 3G of the conveyor 3 is attached is shown, and the opening / closing operation of the conveyor in the left-right direction is carried by appropriate means so that the elevating bar also operates integrally. It is attached to the conveyor 3.

The elevating bar 13 is divided into a plurality of parts in the veneer conveying direction (longitudinal direction of the stacked veneers) shown by arrow A in FIG.
Each can be raised and lowered as desired by 16 units. FIG. 1 shows an example in which the veneer is placed only in the latter half of the veneer stacking position. However, in the past, the form of veneer stacking has a strong tendency to hang down at the rear end, and it is sufficient to handle only the latter half. The examples are given below.

Reference numeral 14 is a fixed bar, which is a strip-shaped steel strip having a narrow width similar to that of the elevating bar, and is arranged in parallel with the elevating bar 13 vertically above and slightly above the conveyance road surface R, and a buffer mechanism such as a coil spring is interposed therebetween. Then, the mounting bracket 15 appropriately locks the fixed machine frame.

The fixed bar 14 is composed of one fixed bar each on the left and right over the entire single plate stacking position, and there is also an example in which the fixed bar 14 is divided into a plurality in the single plate transport direction. The embodiment in which only the latter half portion of FIG. 1 is provided has the same meaning as the description in which only that portion of the elevating bar 13 is arranged. It should be noted that it is preferable to increase friction between the lifting bar 13 and the fixed bar 14 by contacting the veneer with a concavo-convex belt or the like.

Further, in the veneer stacking apparatus according to the present invention, the veneer stacking level is roughly divided into three equal parts in the longitudinal direction (the veneer carrying direction), and the veneer loading levels are detected near the front end, the intermediate part and the rear end, respectively. A detector such as a photoelectric tube is provided, and a fixed bar 14 for holding a single plate and an elevating bar 13 are provided on the front side, the central portion, and the rear side.
When the single level of the rear plate is brought in by the signal from the level detector, for example, when the level of the rear side is low, the elevating bar 13 arranged at the rear side is activated to move the single plate to the rear end as much as possible. It is also possible to easily incorporate automatic level correction means for loading.

An embodiment of the veneer deposition apparatus of the present invention will be described with reference to the drawings. The sized veneers are accumulated in a substantially predetermined length in a preceding step, and conveyed in such a manner that short sized veneers do not open too much. It is transferred to the conveyor 3 and is loaded in the direction of arrow A, which is orthogonal to the single plate fibers.

When the front edge of the sizeable veneer group reaches near the front end of the veneer stacking position as the veneer continues to be conveyed, a veneer detector (not shown) such as a photoelectric tube outputs a signal, and the lifting mechanism first.
16 is actuated and the elevating bar 13 rises, and in cooperation with the fixed bar 14, the veneer of the part (in the embodiment of FIG. 1, the rear end part of the sized veneer group) is sandwiched from the conveyance road surface R. It floats and breaks the single-plate conveying force of the conveyor.

After the partial veneer floats in this way, the conveyor 3
And the holding conveyor 4 is stopped, and therefore the sandwiched levitation veneer and the preceding veneer group carried in on the front side thereof are slightly separated from each other, but this is the raising operation of the elevating bar 13 and the conveyance of the conveying conveyor group. Even if they are stopped at the same timing, the space between the two veneers will be opened due to the inertia of the transfer veneer on the conveyor.

Next, following the stop of the conveyor, the elevating bar 13 descends to release the sandwiching veneer onto the conveyor, and the conveyor 3 is rapidly opened to the left and right by an opening / closing mechanism such as a fluid cylinder (not shown). The veneer is dropped and deposited on the lower lifter, immediately returned to the old position, and the next veneer is carried in. The above operation is repeated thereafter.

The operation effect of the elevating bar 13 will be described in detail. It functions to separate the sized veneer sandwiched and levitated from the preceding veneer group that has been carried in, resulting in the sized veneer group. Since the veneers are loaded with the middle part of the pile not in the front and rear ends, the stacking state is in the state of a hollow, which prevents the pile from collapsing.

〔The invention's effect〕

As described in detail above, according to the device of the present invention, it is not always necessary to bring the short sized single plate into a close contact state, and the speed of the line can be increased. Since it is possible to reliably load the sized veneers, it is possible to load the veneers in a concave shape, and the piles do not collapse, and the dimensional veneers can be stacked at an efficient height.

[Brief description of drawings]

1 schematically shows an embodiment of the present invention. FIG. 1 is a side view and FIG. 2 is a front view. 2 …… Lifter 3 …… Transport conveyor 4 …… Pressing conveyor 13 …… Elevating bar 14 …… Fixing bar 16 …… Elevating mechanism R …… Conveying road surface

Claims (5)

[Claims] 1. A conveyor provided with a lifter for loading a single plate, which is arranged above the lifter to transfer the single plate in a direction orthogonal to the fibers and which can be opened and closed left and right by an opening / closing mechanism, and a holding conveyor arranged above the transfer conveyor. And an elevating bar which is divided into a plurality of pieces in the single plate conveying direction and is arranged below the conveying road surface, and which is attached to the conveying conveyor so as to be vertically movable by an elevating mechanism.
It is equipped with a fixed bar facing the lifting bar above the transport path and locked to the stationary machine frame, and a veneer detector located near the tip of the veneer stacking position. Start the elevator bar at the place where it has stopped, quickly sandwich the single plate of that part and levitate it from the transport road surface, then stop the upper and lower conveyors that transport the single plate by detecting the preceding stacking position of the single plate Then, the elevating bar for sandwiching the single plate is lowered and released to arbitrarily modify the single plate stacking state. 2. An apparatus for depositing a single-sized veneer according to claim 1, wherein the opening / closing mechanism of the conveyor is constituted by a fluid cylinder. 3. An apparatus for depositing a single-sized veneer according to claim 1, wherein the elevating bar and the fixed bar are arranged at the rear end of the veneer stacking device. . 4. The apparatus for depositing a single-sized veneer according to claim 1, wherein the elevating mechanism of the elevating bar is constituted by a fluid cylinder. 5. The apparatus for depositing a single-sized veneer according to any one of claims 1 to 4, wherein the fixing bar is attached via a buffer mechanism.