JPH047961B2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention is a veneer veneer board whose ends have been previously processed into scarves with contrasting slopes, and where adhesive has been applied to both sides or one side of the board surface. , LVL (laminated veneer lumber) or LVB (laminated veneer board), in which the scarf parts are overlapped and the overlapped parts are shifted in a step-like manner to create an intermediate product with a predetermined number of laminated layers. This relates to an automatic assembly method used in the manufacturing process of laminated veneer materials, commonly known as .

(b) Prior art 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.
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, the intermediate product not only deviates significantly back and forth in the construction direction, causing overlaps and tunnels at mutual tip joints, but also
There were serious problems in terms of function and quality, such as large deviations in the direction perpendicular to the construction direction, that is, in the left and right sides of the intermediate product, and the formation of stairs on the sides of the joints of mutual ends. In order to eliminate the sheet misalignment in the construction direction and in the orthogonal direction, the invention was developed by ``processing both ends into contrasting scarves, and applying adhesive to both or one side of the laminated veneers to one side on a ring conveyor.
After determining the origin of the transfer of the veneer in the direction of construction using fixed or movable stoppers installed at several locations, and detecting the deviation from the conveyance reference line in the direction perpendicular to the direction of construction, the veneer is transferred. A transfer robot moves the scarves in parallel to one or several assembly locations formed on the side assembly conveyor while correcting the deviation from the conveyance reference line, so that the scarf overlapping locations for each layer are placed at predetermined intervals in the assembly direction. It was constructed so that it could be transferred one on top of the other.

(d) Means for solving the problem The present invention provides a means for applying an adhesive to both or one side of the veneers to be laminated, a means for determining the origin of transfer with respect to the construction direction of the veneers to be laminated, and A means for detecting and correcting the deviation of the veneer to be laminated from a conveyance reference line in a direction perpendicular to the construction direction, and furthermore, a means for shifting and overlapping the scarf overlapping points of each layer of the veneer to be laminated by a predetermined interval in the construction direction. As a means of transferring a. Glue spreader that applies adhesive to both or one side of the veneer to be laminated.

b. A stopper that stops the tip of the laminated veneer.

c. A line sensor that detects the conveyance reference line of the laminated veneer.

d. A transfer robot equipped with a suction or sticking device that transfers the laminated veneers onto a side mechanical conveyor while shifting and stacking them at predetermined intervals while correcting computer setting values based on detection signals from the line sensor.

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) Function The glue spreader of the above a) of the present invention is obtained by modifying a conventionally well-known double-sided coating type glue spreader in which sets of a spreader roll and a doctor roll are disposed on the upper and lower sides. A set of spreader rolls and doctor rolls on either the lower or upper side and a set of pinch rolls installed separately on the lower or 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 if necessary, it is also possible to pause the application of adhesive, and it is a switchable type that can apply both sides to one side and pause the application. It is a glue spreader with the same effect.

In addition, the stopper b) is used to move the tip of the veneer to be laminated, which is conveyed by ring rolls arranged in multiple stages with adhesive applied to both or one side, to the transfer origin in one to several locations in the construction direction. It is a device for stopping the X, and usually the final stage stopper is a fixed type, and the intermediate stage stopper is a movable type configured to be able to move up and down with an air cylinder etc. If the location is spread over several locations, the final stage stopper and intermediate stage stopper are illustrated in Fig. 4. Intermediate product 1
In the structure shown in FIG. For each predetermined interval P of the mating points 3, for example, the assembly is constructed in multiple stages at intervals of about 20 to 30 times the plate thickness t, and the transfer origin X in the initial construction direction is determined.

Furthermore, the line sensor (c) above is generally composed of a photoelectric switch device in which light emitting/receiving diodes etc. are movably arranged at multiple points or together with a cylinder equipped with an encoder, a photoelectric cell divided into multiple stages, etc. It is mainly a photoelectric type line sensor or image sensor, which detects the presence or absence of a detected object in a linear manner and detects its deviation by outputting the detection signal to a computer etc. Any ordinary deviation detection device with the same effective function is sufficient.

Next, the transfer robot equipped with the suction or sticking device described in d) transfers the veneers to be laminated, which have been stopped at the transfer origin X in the direction of the structure at one to several locations, to one on the side structure conveyor. It is an assembly device that transfers intermediate products to several assembly locations while correcting deviations from the transport reference line Y-Y during movement using a line sensor and computer, and stacks them into a continuous series of intermediate products. The suction or sticking device attached to the head connects an exhaust device such as a blower or fan to the suction box, and applies adhesive to the saw-blade-shaped suction site to cover almost the entire area of the veneer to be laminated. The veneer to be laminated is adsorbed in a floating state, and when the veneer to be laminated is adsorbed in this floating state and reaches a predetermined assembly location, its exhaust is cut off to cancel the previous adsorption, or instead of this adsorption, the laminated veneer is adsorbed. The veneer is pierced with a nail, needle, etc. using an air cylinder, etc., so that it is stuck in a floating state, and the stuck object is released in this floating state using a separate pull-out bar, etc. In addition, the transfer robot is basically a multi-jointed robot that can move horizontally, vertically, and vertically, a well-known device such as an XY table with a vertical movement mechanism such as an air cylinder, or a similar device. It is composed of multiple devices connected in a turret type, and these transfer robots operate based on instructions from a computer regarding the preset transfer route and transfer location of the laminated veneers. The transfer operation is automatically controlled so as to complete the transfer operation while correcting the left and right movement in and out based on the deviation signal of the conveyance reference line Y-Y from the line sensor.

(F) Example The arrangement of the apparatus for carrying out the automatic assembly method of the present invention is as illustrated in FIGS. 4 for thickness t
A contrasting scarf 2a with a slope S of ~8 times,
The laminated veneer 2 processed into 2b is transferred to a roll conveyor 4
While conveying the fiber in the direction of the fiber, an appropriate amount of adhesive is applied to both or one side of the fiber using a switchable glue spreader 5 or a glue extractor with the same function. The glue spreader 5 of the above embodiment has upper and lower spreader rolls 5a and 5b.
In addition to doctor rolls 5c and 5d for double-sided coating, pinch rolls 5e and 5f that are movable by air cylinders etc. are installed in parallel, and in the case of single-sided coating, the spray rolls on either one of the sides are installed in parallel. The doctor roll 5a or 5b and the doctor roll 5c or 5d slide outward by the operation of an air cylinder or the like, and in turn, the pinch roll 5e or 5f on either side slides inward by the operation of the air cylinder or the like. , the spreader roll 5a or 5 on either side, including the pause in its application.
The apparatus is configured such that single-sided coating and double-sided coating using the doctor roll 5c or 5d can be 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, 5
d outward and the upper and lower pinch rolls 5
e and 5f inward to stop applying 5 g of adhesive on the upper and lower sides, and to apply 5 g of adhesive on the first layer, final layer, or intermediate odd-numbered layer of the intermediate product 1 that does not require application of 5 g of adhesive. The upper and lower spreader rolls 5a, 5
b and the doctor rolls 5c, 5d inward, and the upper and lower pinch rolls 5e, 5f outward to apply the adhesive 5g on both sides, or apply the adhesive 5g on one side of either the upper or lower side using the intermediate All veneers to be laminated in the intermediate layer except the first and final layers of the product 2
operate it as you would do it. Then, the laminated veneer 2 that has been coated with adhesive on both sides or one side by the glue spreader 5 or a glue extractor with the same function, or that has passed freely without being coated, is subsequently arranged in multiple stages. The ring conveyor 6 continues to transport the ring conveyor 6, and a fixed stopper 7 and an air cylinder 8 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 collides with the movable stopper 8 equipped with the ring conveyor 6, the ring conveyor 6 remains rotated and the veneer 2 to be laminated is stopped parallel to the entire surface by the stoppers 7 and 8, and the stopping position is set in the subsequent process. This becomes the transfer origin X of the laminated veneers 2 in the construction direction during the construction operation.

On one side or on one side of the ring conveyor 6 that conveys the veneer sheets 2 to be laminated, fixed stoppers 7 and movable stoppers 8 are installed at one or several locations (two locations in the illustrated case). Laminated veneer 2
A plurality of line sensors 12a to 12d are installed on the conveyance reference line Y-Y in correspondence with the stopping positions of the conveyance reference line Y-Y, with their detection lines oriented in a direction perpendicular to the conveyance reference line Y-Y. , thereby automatically detecting deviation from the conveyance reference line Y-Y set approximately at the center of the line sensors 12a to 12d each time a restraining operation is performed, and sends the detection signal to the computer 13, which is set in advance. During the transfer operation of the transfer robot 10 based on instructions from the computer 13 regarding the transfer route and transfer location of the laminated veneer 2, the deviation from the transfer reference line Y-Y, that is, the left and right It is designed to automatically correct entry and exit.

The veneers 2 to be laminated, which are stopped at one or several transfer origins X on the ring conveyor 6, are transferred to a structured conveyor consisting of an endless belt or the like disposed parallel to the side of the ring conveyor 6. One or more transfer robots 10 equipped with suction or sticking devices are 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 robot 9. , the laminated veneer 2 on the ring conveyor 6 is placed behind the intermediate product 1 on the structured conveyor 9,
For example, a transporter such as an articulated robot shown in the figure is used to shift and stack the scarf overlapping parts 3 of each layer at predetermined intervals P, for example, at intervals of about 20 to 30 times the plate thickness t. In the case of the loading robot 10, the computer 13 automatically controls operating mechanisms such as servo motors installed in the multi-joint parts, and operates the robot 10 to freely move horizontally, vertically and vertically. While the intermediate products 1 are assembled in a continuous manner at one or several assembly locations (two locations in the case of illustration), the assembly is performed in a continuous manner by intermittent operation of the assembly conveyor 9 corresponding to the pasting cycle of the subsequent process. The intermediate product 1 thus produced is delivered to a heat-pressing device such as a high-frequency tack press or a continuous hot press in a subsequent process. In the case of the illustrated transfer robot 10, a suction device 11 is attached to the head 10a, and the suction box 11a of the suction device 11 is attached to the head 10a.
The adhesive is applied to almost the entire area of the veneer 2 to be laminated, so that it can be sucked in a floating manner, and the suction member 11b has a saw blade shape and is capable of ventilation.
Although not shown, a vertical operating mechanism such as an air cylinder is installed inside the head 10a to control the suction force of an exhaust device such as a blower or fan connected to the exhaust pipe 11c. Due to the action and its vertical movement, the laminated veneer 2 held parallel to the transfer origin X in the assembly direction is accurately adsorbed as it is to the saw blade-shaped suction member 11b, and this is further assembled. The scarves are moved parallel to the conveyor 9 while correcting their right and left entrances and exits, and the suction is released at one or several (two in the case of the illustration) stacking locations 3 where the scarves are stacked, and the scarves are sequentially shifted and stacked. An automatic system operation is performed to load the data. Then, the X and Y axes of the laminated veneer 2 from the transfer origin X to the respective scarf overlapping points 3 when the veneer 2 to be laminated is moved in parallel from its deviation with respect to the conveyance reference line Y-Y while correcting the left and right entrances and exits. The amount of movement is determined by the computer 13 while detecting it with an encoder attached to the operating mechanism such as the servo motor.
The movement amount of the actuating mechanism is automatically controlled by comparing this with a pre-stored and corrected setting value, thereby accurately moving the scarf overlapping point 3 back and forth while correcting the movement in and out of the left and right each time. It is possible to make it consistent with .

(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 X in the construction direction of the veneer using the fixed or movable stopper installed, and detecting the deviation from the conveyance reference line Y-Y in the direction perpendicular to the construction direction, the veneer is transferred. The transport reference line Y-Y is moved by a transfer robot to one or several assembly locations formed on the side assembly conveyor.
The scarves are moved parallel to each other while correcting the deviation from the scarf, and the scarf overlapping points of each layer are shifted by a predetermined interval and then transferred. 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. It is structured so that it is layered in a shape that
When the veneer to be laminated is dropped or moved to the assembly area immediately below, the top end of the veneer falls to the front or back in the conveyance direction due to the influence of inertia and friction, that is, the intermediate product. Not only does it deviate significantly back and forth in the construction direction, causing overlaps and tunnels at the mutual tip joints, but it also deviates greatly in the direction perpendicular to the construction direction, that is, to the left and right of the intermediate product, causing the mutual tip joints to overlap. This invention has succeeded in eliminating all serious functional and quality problems such as the creation of stairs on the sides of the parts. While the laminated veneer is accurately held by a large-area adsorption or sticking device, the transport reference line Y-Y is
Using a transfer robot that detects the deviation from the original setting value and moves parallel to the X and Y axes while correcting the memory of the initial setting value, the scarf stacking point for each layer is shifted by a predetermined interval without moving in or out from the left or right. Since it is transferred and assembled into a continuous intermediate product, there is no inertia with respect to the moving speed of the laminated veneers, which occurs when the veneers are simply dropped or moved directly below to the assembly location in the conventional technology. It completely eliminates longitudinal and horizontal deviations due to friction, etc., and enables efficient production of high-quality intermediate products without overlaps, tunnels, or stairs through automatic operation.

[Brief explanation of drawings]

The figures 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, stopper, and line sensor, and Fig. 3 is an explanatory diagram showing the arrangement of the entire device. The figure is Figure 1A
4 is a side view of an intermediate product in the assembly process. 1... Intermediate product, 2... Laminated veneer, 2a, 2b...
Scarf, 3...Scarf overlapping location, 5...Glue spreader, 7, 8...Stopper, 9...Structured conveyor, 10...Transfer robot, 12...Line sensor, 13...Computer.

Claims (1)

[Claims] 1 Applying an adhesive to both sides or one side of the laminated veneer, which has been processed into a scarf with contrasting slopes, in the direction of the fibers, using a glue spreader, and applying the adhesive and conveying it. The tip of the veneer to be laminated to be laminated is stopped by a stopper installed at one or several locations to determine the origin of transfer in the direction of construction, and the origin of transfer in the direction of construction is determined. A line sensor detects deviation from a transport reference line in a direction perpendicular to the arrangement direction, determines a transfer origin with respect to the arrangement direction, and detects deviation from the transport reference line in a direction perpendicular to the arrangement direction. A deviation signal from the conveyance reference line detected by the line sensor is sent to the computer to correct the set value corresponding to one or several assembly locations where the veneer to be laminated is formed on the side assembly conveyor. The laminated veneer material is characterized in that the scarf overlapping portions of each layer are shifted and stacked at a predetermined interval in the construction direction by a transfer robot equipped with a suction or sticking device installed so that the scarf can be moved in parallel. Automatic mechanism method.