JPH0438203B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial Application Field The present invention is a veneer single piece in which both sides of the ends have been previously processed into contrasting square-cut scarves, and an adhesive has been applied to both sides or one side of the board surface. LVL (laminated veneer lumber) or LVB (laminated veneer lumber) is made by overlapping the scarf parts of the boards and shifting the overlapped parts in a step-like manner to create an intermediate product with a predetermined number of layers.
This article relates to an automatic assembly method used in the manufacturing process of laminated veneer materials commonly known as boards.

(b) Conventional method A method and device for assembling this type of laminated veneer material according to the prior art is disclosed in, for example, Japanese Patent No. 982535 (Japanese Patent Publication No. 982535).
No. 14641) ``A device that sequentially abuts the tip of the veneer veneer being conveyed by a multi-row roller to stop its conveyance step by step,'' as disclosed in the Continuous Manufacturing Apparatus for Laminated Veneer Materials, etc. A large number of stopper groups that can be raised and lowered freely, and the veneer veneers that are stopped in stages by the stopper groups are dropped directly below each time by a lifting mechanism attached to the multi-row rollers, thereby joining the veneer veneers in the stacking process. The machine was designed to produce laminated veneer material with stepped sections.
A so-called butt joint type device that uses a large number of fixed stopper groups to stack a predetermined number of layers of intermediate products one by one at a fixed location, or a patent application published in 1982-500126 for laminated wood. As disclosed in the manufacturing method and manufacturing equipment, etc., it is possible to stop the conveyance in stages by sequentially moving and coming into contact with the cut end of the wood veneer being conveyed by a conveyor. The wood veneer, which is stopped in stages by the single stop device, is moved directly downward each time by a pressing and gripping device, and the joint portion of the wood veneer in the process of being laminated is stepped. The so-called scarf joint method is used to manufacture laminated wood with staggered shapes.A single, movable stopping device is used to move each wood veneer to a predetermined position by moving it from point to point. There was a device that was designed to continuously process intermediate products with a number of laminated layers.

(c) Problems to be Solved by the Invention As mentioned above, the method and device for constructing this type of laminated veneer material according to the prior art has been described as follows: A structure in which the mutual tip joints of the veneers are stacked in a shape in which each layer is staggered at a predetermined interval in the construction direction while the veneer is dropped directly below, or a single movable stop device. The laminated veneer is moved directly below the veneer to be laminated, which has been stopped in stages, and the veneers are laminated in such a manner that the joints of the mutual ends of the veneer are shifted by a predetermined interval for each layer in the construction direction. In both cases, when the veneer to be laminated is dropped or moved to the assembly area directly below, the falling position of the tip of the veneer is affected by inertia and friction, and the position at which the tip of the veneer falls is shifted forward or backward in the conveyance direction. In other words, due to the function, the intermediate product may deviate significantly back and forth in the construction direction, causing overlaps and tunnels at mutual tip joints.
Since there was a serious problem in terms of quality, the present invention was developed in order to eliminate this deviation in the direction of the structure. After determining the origin of the transfer of the veneer in the construction direction using a fixed or movable stopper installed at one or several locations on the ring conveyor, the veneer is formed on the side construction conveyor. The scarves are moved in parallel to several assembly locations by a transfer robot, and the scarfs are stacked at predetermined intervals in the assembly direction, and then transferred.

(d) Means for solving the problems The present invention provides a means for applying an adhesive to both or one side of the veneer to be laminated, a means to determine the origin of transfer in the construction direction of the veneer to be laminated, and As a means of shifting and stacking the scarf overlapping parts of each layer of the laminated veneers at predetermined intervals in the construction direction, (a) a switching type glue that applies adhesive to both or one side of the laminated veneers; Spretzder.

(b) A fixed or movable stopper that stops the tip of the laminated veneer.

(c) A transfer robot equipped with a suction or sticking device that transfers the laminated veneers onto a side conveyor in a staggered manner at a predetermined interval.

This is an automatic method for assembling veneer laminated materials, in which veneer laminated materials are arranged in a series of steps and laminated in a staggered manner by automatic operation.

(E) Effect The switching type glue spreader according to the above (a) of the present invention is a modification of the conventionally well-known double-sided application type glue spreader in which sets of a spreader roll and a doctor roll are installed on the upper and lower sides. so that the pair of spreader roll and doctor roll on either the lower side or the upper side and the pair of pinch rolls installed separately on the lower side or the upper side are switched alternately or simultaneously,
That is, when this glue spreader is used as a single-sided application type, the pair of spreader roll and doctor roll on either the lower or upper side is moved outward by an air cylinder or the like, and the pinch roll is used instead. This is made possible by sliding the assembly inward using an air cylinder, etc., and it is also possible to pause the application of adhesive if necessary.This is a switchable glue sprayer that can apply both sides to one side and pause the application. It is Tsuda.

In addition, the fixed or movable stopper mentioned in (b) stops the tip of the veneer to be laminated at one to several places while being conveyed by ring rolls arranged in multiple stages with adhesive applied to both or one side. It is a device for stopping the transfer at the origin in the assembly direction, and the final stage stopper is usually a fixed type, and the intermediate stage stopper is a movable type that can be moved up and down by an air cylinder etc. In addition, in the structure of the intermediate product 1 illustrated in FIG. 4, where there are several assembly locations, the stopper at the final stage and the stopper at the intermediate stage are set at 4 from the total length l of the laminated veneer 2 to the board thickness t. This can be constructed at intervals (l-S) minus the scarf slope S, which is approximately 8 times larger, or at each predetermined interval P of the overlapping portion 3 of each layer, for example, approximately 20 to 30 times the plate thickness t. The structure is constructed in multiple stages at intervals of , and the transfer origin for the initial construction direction is determined.

Furthermore, the transfer robot (c) equipped with a suction or sticking device transfers the veneers to be laminated, which are once stopped at one to several transfer origins in the direction of the structure, to one or more of the veneers on the side structure conveyor. It is a assembly device that is transferred to several assembly locations and laminated into continuous intermediate products, and the adsorption or sticking device attached to the head of the assembly device uses an exhaust device such as a blower or fan as a suction box. Approximately the entire area of the veneer to be laminated with adhesive applied to the saw-blade-like adsorption site is suctioned in a floating position, and the veneer to be laminated, which has been suctioned in this floating position, reaches the predetermined assembly location. When this occurs, the exhaust gas is cut off to release the previous suction, or instead of this suction, the veneer is pierced with a nail, needle, etc., using an air cylinder, etc., so that the veneer is stuck in a floating state. In addition, in addition to being operated to release the stuck object in this floating form using a separate pull-out bar, etc., the transfer robot is basically a multi-purpose robot that can move horizontally, vertically, and vertically. jointed robot,
It consists of a well-known device such as an XY table with a vertical movement mechanism such as an air cylinder, or a multiple device in which the same device is connected in a turret type, and these transfer robots are configured in advance. The transfer operation is automatically controlled based on instructions from a computer or the like regarding the transfer route and transfer location of the laminated veneers.

(F) Example The arrangement of the apparatus for carrying out the automatic assembly method of the present invention is as illustrated in FIGS. The laminated veneer 2 processed into contrasting scarves 2a and 2b with a slope S of about 4 to 8 times the slope S is conveyed in the fiber direction by a roll conveyor 4, etc., and a switchable glue spray is applied to both or one side of the laminated veneer 2. Apply an appropriate amount of adhesive using Tsuda 5, a Glue Extruder with the same function, or an airless sprayer. The glue spreader 5 of the above embodiment has spreader rolls 5 on the upper and lower sides.
A, 5b and doctor rolls 5c, 5d are equipped in a double-sided coating type, and pinch rolls 5e, 5f which are movable by an air cylinder etc. are installed in parallel, and in the case of single-sided coating, either one of the above-mentioned sides is installed. The spreader roll 5a or 5b and the doctor roll 5c or 5d are moved outward by the operation of an air cylinder or the like, and the pinch roll 5e or 5f on either side is moved inward by the operation of the air cylinder or the like. Spreader roll 5a on either side during sliding movement, including the pause in its application.
Alternatively, the device is configured such that single-sided coating and double-sided coating using the doctor roll 5b and the doctor roll 5c or 5d are performed alternately by switching operations. Therefore, the upper and lower spreader rolls 5a, 5b and the doctor roll are used for the laminated veneer 2 that does not require the application of adhesive for the first layer, the final layer, or intermediate odd-numbered layers of the intermediate product 1. 5c and 5d are moved outward, and the upper and lower pinch rolls 5e and 5f are moved inward to stop applying 5 g of adhesive to the upper and lower parts, and also eliminate the need to apply 5 g of adhesive from the intermediate product 1. The upper and lower spreader rolls 5a, 5b and doctor rolls 5c, 5d are slid inwardly on the intermediate even-numbered layers of the veneer 2 to be laminated, excluding the first layer, the final layer, and the intermediate odd-numbered layers. At the same time, the upper and lower pinch rolls 5e and 5f are slid outward to apply 5g of adhesive on both sides, or
Alternatively, the single-sided coating on either the upper or lower side is performed on all the veneers 2 to be laminated in the intermediate layer except for the first layer and the final layer of the intermediate product. Then, the laminated veneer 2 that has been coated with adhesive on both or one side by the glue spreader 5 or a glue extractor with the same function, airless spray, etc., or that has passed freely without being coated, continues to be coated with adhesive. The conveyance is continued by a ring conveyor 6 arranged in multiple stages, and a fixed stopper 7 and an air cylinder are installed at one or several locations (two locations in the illustrated case) at the end portion of the ring conveyor 6 and the intermediate portion thereof. When the tip of the ring conveyor 6 collides with a movable stopper 8 equipped with 8a, 8b, etc., the veneer 2 to be laminated is stopped parallel to the entire surface by the stoppers 7 and 8 while the ring conveyor 6 continues to rotate, and the stopping position is changed to the rear. This serves as the origin of transfer of the laminated veneers 2 in the construction direction during the construction operation of the process.

The laminated veneers 2 stopped at one or several transfer origins on the ring conveyor 6 are transferred to a structured conveyor 9 consisting of an endless belt or the like disposed parallel to the side of the ring conveyor 6. A transfer robot 10 equipped with a suction or sticking device is installed so as to be able to move in parallel corresponding to one to several (two in the illustrated case) assembly locations formed on the ring conveyor 6. The upper veneer 2 to be laminated is stacked behind the intermediate product 1 on the structure conveyor 9, with the scarf overlapping portions 3 of each layer shifted by a predetermined interval P, for example, at intervals of about 20 to 30 times the thickness t of the plate. For example, in the case of the transfer robot 10 consisting of a multi-jointed robot as shown in the figure, operating mechanisms such as servo motors built into the multi-jointed parts are automatically controlled by a computer etc. so that the transfer robot 10 can move horizontally and vertically. The intermediate products 1 are continuously assembled at one to several (in the illustrated case, two) assembly locations on the assembly conveyor 9 by vertically movable operation, and are normally used in the pasting cycle of the subsequent process. By intermittent operation of the corresponding structured conveyor 9, the continuous intermediate product 1 is delivered to a subsequent process such as a high frequency tack press or a continuous hot press. In the case of the transfer robot 10 shown in the drawings, a suction device 11 is attached to the head 10a, and the suction box 11a of the suction device 11 is used to hold the laminated sheets coated with adhesive. Approximately the entire area of the plate 2 can be suctioned in a floating manner, and a saw-blade-like bicolor and breathable suction member 11b is attached to the suction portion in a mesh pattern, and furthermore, although not shown, the head 10a is attached to the suction portion. Inside is a vertical operating mechanism such as an air cylinder, and the exhaust pipe 1
Due to the suction force of an exhaust device such as a blower or fan connected to 1c and its vertical movement, the laminated veneer 2 held parallel to the transfer origin in the above-mentioned assembly direction is directly cut into a saw blade shape. Adsorption member 11
b, and then move the scarves in parallel onto the assembly conveyor 9, release the attraction at one or several (two in the case of the figure) stacking locations 3 of the scarves, and shift them sequentially. The automatic system operation for stacking the veneers by moving the laminated veneers 2 in parallel from the transfer origin calculates the deviation of the X and Y axes to each scarf stacking point 3 using an attached encoder, etc. While detecting this, it is compared with set values stored in advance in a computer, etc., and the operating mechanisms such as servo motors installed in the multi-jointed parts of the transfer robot 10 are automatically controlled, thereby accurately each time. This made it possible to align the scarf overlapping locations 3.

(g) Effects of the invention As stated above, the present invention is based on the following: ``Both ends of the scarves are processed into contrasting scarves, and the veneers to be laminated with adhesive applied to both or one side of the scarves are placed at one or several locations on a ring conveyor. After determining the transfer origin in the construction direction of the veneer using a fixed or movable stopper installed, the veneer is transferred horizontally, vertically, and to one or several construction locations formed on the side construction conveyor. The scarves are moved in parallel by a vertically movable transfer robot, and the scarf stacking points of each layer are shifted and stacked at a predetermined interval. The veneers to be laminated, which were stopped in stages by the group, were dropped directly below, and the mutual tip joints of the veneers were stacked in a shape in which each layer was shifted at a predetermined interval in the construction direction. While moving the veneer to be laminated, which is stopped in stages by a single, movable stopping device, directly below, the mutual end joints of the veneers are shifted by a predetermined interval for each layer in the construction direction, and stacked. When the veneer to be laminated is dropped or moved to the assembly area directly below, the leading edge of the veneer is affected by inertia and friction. Items that have serious functional and quality problems such as falling positions that are significantly shifted back and forth in the transport direction, that is, back and forth in the assembly direction of intermediate products, causing overlaps and tunnels at mutual tip joints. When using the present invention, the veneer to be laminated, which is restrained at the transfer origin in the construction direction, is accurately held by a large-area suction or sticking device while being moved parallel to the X and Y axes. The moving transfer robot moves horizontally and in parallel, shifting the overlapping parts of each layer of scarves at predetermined intervals and stacking them to form a continuous intermediate product. Since the vertical movement and vertical movement are automatically controlled by a computer, etc., there is no problem with inertia, friction, etc. caused by the moving speed of the laminated veneer, which was caused when the conventional technology simply dropped or moved it directly below the assembly location. This system completely eliminates misalignment and enables efficient production of high-quality intermediate products without overlaps or tunnels through automatic operation.

[Brief explanation of drawings]

The drawings show an example of the implementation of the present invention, in which Fig. 1 is an explanatory diagram showing the arrangement of the entire device, Fig. 2 is a side view showing the arrangement of the glue spreader, ring roll, and stopper, and Fig. 3 is an explanatory diagram showing the arrangement of the entire device. FIG. 4 is a side view of an intermediate product in the assembly process. 1... Intermediate product, 2... Laminated veneer, 2a, 2
b...Scarf, 3...Scarf overlapping area,
5... Glue spreader, 7, 8... Stopper, 9... Mechanical conveyor, 10... Transfer robot.

Claims (1)

[Claims] 1. Applying adhesive to both sides or one side of the laminated veneer, which has been processed into a scarf with contrasting ends, in the direction of the fibers, using a switchable glue spreader, and applying the adhesive. Stopping the leading end of the laminated veneer to be transported with a fixed or movable stopper installed at one or several locations to determine the origin of the transfer in the assembly direction;
The veneer to be laminated, whose transfer origin in the construction direction has been determined, is mounted on a suction or pricking machine that is movable horizontally, vertically, and vertically corresponding to one or several construction locations formed on the side construction conveyor. 1. An automatic method for assembling laminated veneer material, characterized in that the scarf overlapping portions of each layer are shifted and stacked at predetermined intervals in the assembling direction using a transfer robot equipped with a mounting device.