JPH0414604B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for manufacturing columnar or plate-shaped laminated timber.

[Conventional technology]

To manufacture laminated wood, columnar or plate-shaped materials with glue on the required surface are sequentially conveyed toward a stopper and lined up in a row, and when the length exceeds the standard length, the remaining ends are cut off, and the material is placed on a table. Send in the shaku material.

The fixed length materials fed onto the table are stacked upward in the case of columnar materials, and arranged in parallel in the case of plate materials, and are bonded under pressure to produce laminated lumber.

[Problems to be solved by the invention] The columnar or plate-shaped materials that are sequentially conveyed are arranged in a series, and when the materials exceed the standard length, the remaining ends are cut off to make the standard-length materials. The seam (the abutting ends of the columnar or plate-like materials) and each seam in the second row coincide with or come close to each other.

For this reason, there was a problem in that the strength of the manufactured laminated wood was significantly reduced.

A large number of coincident and close joints leads to a significant decrease in strength.

In addition, the material fed at the end of the group of materials for one row or layer of laminated wood is cut by a cutting device in order to match the total length of the group of materials to the standard length of the laminated wood, but at this time, the product side No consideration was given to the length of the cut material at the rearmost end and the length of the excess material to be removed, which could impede material flow or result in products with defects at the rearmost end. As a result of discarding the remaining ends that are inferior or cannot be used due to insufficient length, the yield of laminated wood material is correspondingly low.

[Means for solving problems]

In order to solve the above problems, this invention
a material length measuring device for measuring the length of the material disposed on the first conveyance path; and a material length measuring device disposed on the downstream side of the material length measuring device in the first conveyance path for measuring the length of the material suitable for predetermined assembly conditions. An incoming material selection mechanism that allows only the material to pass through and sends it to the next process, and one row or one row of laminated wood based on the material length data input from the material length measuring device mentioned above.
Arithmetic means for calculating joint position data between each material for each material group of layers, storage means for storing these joint position data, and each time material length data is supplied from the material length measuring device. a comparison means for performing a predetermined comparison between the seam position data outputted from the calculation means and the seam position data for the front row stored in the storage means; In the glulam manufacturing apparatus, the calculation means calculates the difference between the standard length data indicating the standard length of the laminated wood and the seam position data, and the difference is determined to be less than or equal to a predetermined length. , the length of the material at the rearmost end on the product side is at least the specified minimum usable length, and the length of the remaining end cut by the cutting device is at least the minimum usable length. The present invention is equipped with means for issuing a command signal for controlling the feed material selection mechanism to select a material so that the following is achieved.

[Effect]

A length measuring device measures the length of each material that passes sequentially, and this length data is input to a calculation device.

The above calculation device sequentially calculates the joint position data between each material of each group of laminated materials for one row or one layer of laminated wood each time the material length data is input, and stores it in the storage device at the same time. The difference between the standard length data indicating the standard length and the seam position data is calculated.

In addition, the calculation device compares each seam position data calculated in this way with the seam position data of the material group for the previous row stored in the storage device, and calculates the value of the material that has just passed through the material length measuring device. It is sequentially determined whether the joint to be formed is separated from the closest joint in the group of materials in the front row by more than a predetermined minimum allowable amount, and each solenoid for opening and closing the gate block is controlled according to the results. .

As a result, material may be allowed to pass through the gate block or may be captured and evacuated.

In addition, each gate block contains spare materials of different lengths, and the length of each material is stored in the storage device along with the gate block number, so when the calculation device receives a comparison result indicating that the material has not passed through the gate block, First, the data of the preliminary material in the storage device is scanned, and the gate block containing the material meeting the gate block passage permission conditions is moved to the center position of the first conveyance path, and then the material is fed.

Furthermore, if the difference between the standard length data and the seam position data becomes less than a predetermined length determined by the length of the gate block, etc., the length of the material at the rear end on the product side will exceed the predetermined minimum usable length. A command signal is sent to control the feeding material selection mechanism to select and feed the material so that the length of the remaining end cut by the cutting device is equal to or greater than the minimum usable length. emanate.

In this way, the seams of materials in adjacent rows or layers are prevented from matching or coming closer than a predetermined minimum distance, and the length of the material at the rear end on the product side can be used. The length is set to be at least the minimum length, and the length of the remaining end of the material to be cut is set to be at least the minimum usable length.

〔Example〕

In the figure, reference numeral 1 denotes a first conveyance path through which columnar or plate-shaped materials a are sequentially fed.This first conveyance path 1 receives the materials a, and a stopper 2 provided at the head is used to convey the most advanced material. A second conveyance path 3 is connected thereto, in which the materials a are arranged in series with the materials a in contact with each other.

Further, on the tail side of the second conveyance path 3, a cutting device 4 is provided for cutting off the remaining ends of the raw materials arranged in series that are larger than a standard length.

Further, the second conveyance path 3 includes the second conveyance path 3.
A third conveyance path 5 to which the upper standard length material a' is transferred is connected.

In the illustrated case, the third conveyance path 5 is a heating machine 6.
The tail portions are arranged side by side on one side of the second conveyance path 3, and the veneer plate 7, which is arranged in parallel on the remaining side of the second conveyance path 3, is moved forward by the expansion action of the cylinder 8 from the second conveyance path 3. By repeating the above steps, the standard length material a' is fed onto the table 9 of the heating machine 6, and the regular length material a' is sequentially fed from the table 9 to the third conveyance path 5. They may be connected in series, and the standard length material may be pushed out to a position where it comes off the stopper, and the standard length material may be sent from the second conveyance path to the third conveyance path.

In addition, in the illustrated case, the stopper 2 may be a stationary type that is supported by the veneer plate 7 and does not collide.

Further, at the above-mentioned appropriate locations, coating devices 10 and 11 are provided for applying an adhesive to the end surface of the material a and the assembled contact surface of the regular length material a'.

As shown in FIGS. 12 and 13, the end surface coating device 10 has an adhesive storage tank 12 arranged directly below between the rollers of the third conveyance path 5, and a cylinder 13 arranged directly above the tank 12. An elevating plate 14 is provided which moves up and down by the action of contraction and expansion. First, the lower end of the elevating plate 14 is immersed in the tank 12 while being lowered by the elongating action of the cylinder 13. The material a is stopped by colliding with the end face (end) of the material a, and then the adhesive adhering to the elevating plate 14 is applied to the end of the material while the elevating plate 14 is raised by the contraction action of the cylinder 13. At the same time, the stop on material a is released.

Note that the fixed length material transported by the third transport path 5
In order to provide a predetermined distance between the opposite ends of each material a', the third conveyance path 5 may be constructed by combining a low-speed roller conveyor followed by a high-speed roller conveyor, for example.

The coating device 11 for laminated surfaces is shown in FIGS. 10 and 11.
Cooling drums 15 located front and rear as shown in the figure
The circumferential surface of the cooling drum 1 is brought into contact with the circumferential surface of the roll 16, and the adhesive supplied between the contact surfaces is applied to the cooling drum 1.
5 and apply it to the upper surface of the material a while it is running, and when the lower part of the rotating roll 18 driven by the adhesive storage tank 17 is immersed in the adhesive storage tank 17 as shown in FIG. There are cases in which a driven umbrella-shaped transfer roll 19 is brought into contact with the upper peripheral surface of the rotating roll 18, and the coating is applied from the transfer roll 19 to the side surface of the material a while it is traveling.

Further, in front of the coating device 10, a heating device 20 for the material a is provided.

The heating devices 6 and 20 described above are used when the applied adhesive is thermosetting, and are not used when the adhesive does not require heating.

Further, a press assembly 21 for producing a fixed length material a' is connected to the third conveyance path 5.

As shown in FIGS. 17 and 18, the above-mentioned press assembly 21 has a roller conveyor 22 connected to the third conveyance path 5, and pedestals 24 that are raised and lowered by cylinders 23 on both sides of the roller conveyor 22. A swing plate 28 is provided directly above the roller conveyor 22 and swings in the left-right direction by engaging a pinion 27 with a rack 26 that moves forward and backward by the action of a cylinder 25.
The fixed-length material a' is fed from the roller conveyor 22 onto the pedestal 24 by the swinging of the swing plate 28, and the pedestal 24 feeds the fixed-length material a' after feeding the fixed-length material a'. It descends at a pitch equal to the wall thickness of the length material a', and the required layer of the length material is placed on the pedestal 24.
After a' are stacked, a stopper 3 that is raised by the expansion action of the cylinder 29 is placed at one end of the standard length material a'.
0, then the pressure plate 32 is lowered by the extension action of the cylinder 31 to apply pressure from above, and the thrust plate 34 is advanced by the extension action of the cylinder 33 to apply pressure toward the ruler plate 35. In the case where the veneer 37 is advanced by the elongation action of the veneer 37 and the other end of the standard length material a' is pressed while assembling it into a columnar shape, and as shown in FIGS. While bringing the side edges closer together, the veneer 40 is advanced by the expansion action of the cylinder 39 disposed on the remaining side of the roller conveyor 22, and the fixed length material a' is fed from the roller conveyor 21 onto the table 36, and Stopper 4 provided oppositely at both ends
1 and a veneer 43 that advances due to the expansion action of the cylinder 42, the end surface of the material a is adhered, and a resistance plate 44 on the table 38 provides resistance to the sliding of the standard-length material a' that is pushed into the standard-length material a'. In some cases, it is plate-shaped, joining opposite sides of the material a'.

Note that the standard length material a′ to be slid is the cylinder 45.
The holding plate 46 is lowered by the extension action of the holding plate 46 to prevent it from lifting up.

Further, a material length measuring device 47 for measuring the length of the material a is arranged at a predetermined position on the first conveyance path 1.

The material length measuring device 47 described above is designed to measure by rotating a disk 48 whose peripheral edge is in contact with the upper surface of the running material a, as shown in FIGS. 4 and 5.

Further, on the downstream side of the material length measuring device 47 in the first conveyance path 1, an incoming material selection mechanism 49 is disposed that allows only the material a having a length suitable for the assembly conditions to pass through to the next process. This incoming material selection mechanism 49
For example, the second
It is controlled by a control device configured as shown in FIG.

In Fig. 6 and Fig. 7, the incoming material selection mechanism 4
9 has a gate block array 51 that is movable on the table 50 in a direction perpendicular to the direction of entry of the material a transported by the first transport path 1, and the movement of this gate block array 51 is, for example, This is done by the expansion and contraction actions of the cylinder 53.
The gate block array 51 is formed of six integrally movable gate blocks 54 ₁ to 54 ₆ , and the front end of each gate block in the direction in which the material a enters is covered by a gate plate 55 . It can be opened and closed, and the rear end is open.

Further, each of these gate plates 55 is moved up and down by a solenoid 56.

Next, the operation and control of the feed material selection mechanism 49 will be explained with reference to FIG. 22.

The length of the material a sequentially conveyed through the first conveyance path 1 is measured by the material length measuring device 47, and
The measured material length is input to the calculation device 60.

The arithmetic unit 60 is composed of an arithmetic circuit, an arithmetic register, a comparison circuit, a control circuit (not shown), etc., and is used to calculate each material a of the standard length material a' for one row or one layer of laminated wood.
Each time the seam position data is input, it is sequentially calculated and stored in the storage device 61, and the settable standard length l of the laminated wood (see Fig. 23) and the seam position data Ti, Gi (i = 1, 2 ,...).

The calculation device 60 compares each seam position data calculated in this way with the seam position data of each material a for the front row stored in the storage device 61,
It is sequentially determined whether the joint to be formed by the material a that has just passed through the material length measuring device 47 is separated from the closest seam in the group of materials a in the front row by more than a predetermined minimum allowable length, and based on the results. Therefore, the solenoid control circuit 62 for controlling the solenoids 56 for opening and closing the gate blocks 54 ₁ to 54 ₆ and the hydraulic device control circuit 64 for controlling the hydraulic device 63 for operating the cylinders 53 are operated as appropriate.

The comparison operation by the arithmetic unit 60 described above is performed, for example, as follows. As shown in FIG. 23, the storage device 61 stores the joint position data T ₁ , ..., T ₆ obtained by the arithmetic unit 60 from the length data of the material a in the first row of laminated wood at the front end. It is stored as distance data with O as the origin, and when the first material length G ₁ in the second column is input from the material length measuring device 47, the arithmetic unit 60 calculates T ₁ ±α (α is the 2 (predetermined minimum allowable spacing between seams of book material group a) and
G ₁ is compared, and if G ₁ ≦T ₁ −α or T ₁ +α≦G, the material is allowed to pass through the gate block. For example, in FIG. 7, the fourth gate block ₅₄₄ is opened above the center of the first conveyance path 1 by the solenoid control circuit 62 and the hydraulic system control circuit 64, but in the case of the above comparison result, this state is It is maintained. However, in the case of T ₁ + α≦G ₁ , the same comparison as in the case of T ₁ is made for T ₂ or T ₃ and after, and G ₁ has a difference of more than the above minimum allowable distance from all seams in the first row. A gate block made of that material will only be allowed to pass if it has.

If the above comparison result is, for example, T ₁ −α<G<T ₁ +α, the arithmetic unit 60 uses the solenoid control circuit 62
By closing the open gate block to capture the material a, and operating the hydraulic cylinder 53 by the hydraulic control circuit 64, the captured material a is transferred to the gate block 54 ₃ or 54 ₅ in FIG.
The material is evacuated to either the left or right of the first conveyance path 1 as shown in FIG. 1, and its length and gate block number are memorized. If all or some of the gate blocks other than those on the center of the first conveyance path 1 contain spare materials of different lengths (including materials that were rejected from passing through the gate blocks based on the previous comparison results). Since the length of the material is stored in the storage device 61 together with the gate block number, when the calculation device 60 receives a comparison result indicating that the material has not passed through the gate block as described above, it first reads the data of the preliminary material in the storage device 61. By scanning, for example, the one closest to the first transport path 1 among the gate blocks is moved to its center position, and opened by the solenoid 56 to feed the material. Note that by providing drops on the table 50 at appropriate positions on the path of the gate block array 51, the arithmetic device 60
The material in either gate block can be discharged according to a command from the gate block.

When the processing for the first material in the material group in the second row is completed as described above, the seam position data G ₂ , ... are sequentially obtained for the second and subsequent materials in the second row, and the same process as above is performed. The process is repeated.
Since the seam position data G ₁ , . . . in the second column is used for the above comparison operation and is also stored in the storage device 61, the seam position data G _{1 , . . . for the material group in the third column are stored in the storage device 61} .
...The above process is repeated using G ₁ , ... instead of T ₆ as comparison reference data, and the same process as above is performed for the material groups from the 4th row onward to the incoming material selection mechanism 4.
9 operation control is performed.

Further, when the difference between the standard length l of the previous period and the seam position data becomes less than a predetermined length, the calculation device 60 cuts the material so that the length of the material at the rearmost end on the product side is equal to or more than the minimum usable length. The feed material selection mechanism 4 selects and feeds a material such that the length of the remaining end to be cut by the device 4 is equal to or greater than the minimum usable length.
9 is supplied to the hydraulic system control circuit 64 and the solenoid control circuit 62.
The minimum length that can be used is, for example, 150 mm, which allows the material to flow smoothly without falling off the machine during the gluing process, and which does not give an unsightly finish to the product. Set. Further, materials whose remaining ends to be cut are shorter than this minimum length are processed by the incoming material selection mechanism to be used at the beginning or middle of the group of materials from the next row onward. For example, in Fig. 23, the seam position data G ₅ calculated by feeding the material A ₅
When the difference l-G ₅ with respect to the standard length l becomes shorter than a predetermined length, the arithmetic unit 60 immediately calculates the measured material and the gate blocks 54 ₁ , . . . , 54 ₆ stored in the storage device 61. The feeding material selection mechanism selects and feeds a material a ₆ whose length is larger than the above-mentioned minimum usable length and whose remaining end Z is also greater than or equal to the minimum usable length from among the materials. It issues a command signal to control 49. In this case, if the above difference l - G ₅ is shorter than the above minimum usable length, a shorter material is selected and fed as a ₅ , thereby making it possible to
The operation of the incoming material selection mechanism is controlled so that the length of _a6 is longer than the above-mentioned minimum usable length. If necessary, it is of course possible to make it possible to perform a switch operation or the like to select the material that makes the length of the remaining end Z the shortest.

Note that the arithmetic device 60, storage device 61, solenoid control circuit 62, and hydraulic device control circuit 6 described above
4 etc. can be implemented using a commercially available programmable controller, sequencer, etc.

As described above, the standard-length materials a that are lined up in series on the second conveyance path 3 and have their remaining ends cut off by the cutting device 4 are directed to the third conveyance path 5, and are then transferred to the coating device 11. , 10, and the adhesive is applied to the press assembly 21, and the second
The laminated timber is manufactured in the shape of a column as shown in the figure or in the form of a plate as shown in FIG.

〔Effect of the invention〕

As described above, according to the glulam manufacturing apparatus according to the present invention, it is sequentially determined whether the joint to be formed by the materials is separated from the joint closest to it in the group of materials in the front row by a predetermined minimum allowable length or more. Based on the results, the incoming material selection mechanism is activated to capture and pass the material and release the spare material, thereby separating the joints between the front row and the next row, or between the previous layer and the next layer, by at least the allowable length. Therefore, there is no reduction in the strength of the laminated wood, and there is no need for laborious finger joint processing, and furthermore, the material yield of the laminated wood can be significantly improved.

[Brief explanation of drawings]

Fig. 1 is a plan view of the manufacturing device, Figs. 2 and 3 are perspective views of the laminated timber according to the present invention, Fig. 4 is a side view of the material length measuring device, Fig. 5 is a front view of the same, and Fig. Fig. 6 is a plan view of the incoming material selection mechanism, Fig. 7 is a front view of the same as above, Fig. 8 is a plan view showing the feeding section for standard length materials, Fig. 9 is a front view of the same as above, and Fig. 10 is the assembly. FIG. 11 is a side view of the adhesive applicator for the contact surface, FIG. 11 is a front view of the same as above, FIG. 12 is a side view of the adhesive applicator for the butt end surface, FIG. 13 is a front view of the same as above, and FIG. 14 is the assembled contact A front view showing another example of adhesive application on the surface;
FIG. 15 is a side view of the heating machine, FIG. 16 is a front view of the same as above, and FIG. 17 is a plan view of the columnar press assembly.
FIG. 18 is a front view of the same as above, FIG. 19 is a plan view of the plate-shaped press assembly, FIG. 20 is a front view of the same as above, FIG. 21 is a side view of the stopper, FIG. 22 is a control circuit diagram, and FIG. The figure is a plan view of the seam of the assembled standard length material. a...Material, a'...Standard length material, 1...First conveyance path, 2...Stopper, 3...Second conveyance path, 4...
Cutting device, 5...Third conveyance path, 6...Heating machine, 7
... veneer, 8 ... cylinder, 9 ... table,
10, 11... Coating device, 12... Storage tank,
13... Cylinder, 14... Lifting plate, 15... Cooling drum, 16... Roll, 17... Storage tank, 18... Rotating roll, 19... Transfer roll,
20...Heating machine, 21...Press assembly, 22
...Roller conveyor, 23...Cylinder, 24...
...cradle, 25... cylinder, 26... rack, 2
7... Pinion, 28... Rocking plate, 29... Cylinder, 30... Stopper, 31... Cylinder, 3
2...Pressure plate, 33...Cylinder, 34...Piece plate, 35...Ruler plate, 36...Cylinder, 37...
... veneer, 38... table, 39... cylinder, 40... veneer, 41... stopper, 42...
...Cylinder, 43...Piece plate, 44...Resistance plate,
45... Cylinder, 46... Holding plate, 47... Material length measuring device, 48... Disc, 49... Feed material selection mechanism, 50... Table, 51... Gate block array, 53... Cylinder , 53 ₁ to 54 ₆ ... gate block, 55 ... gate plate, 56 ... solenoid, 60 ... arithmetic device, 61 ... storage device,
62... Solenoid control circuit, 63... Hydraulic system, 64... Hydraulic system control circuit.

Claims (1)

[Claims] 1. A second conveyance path is connected to the first conveyance path through which columnar or plate-shaped materials are sequentially fed, and a stopper for stopping the most advanced material at the head of the second conveyance path and a stopper arranged in series at the tail. A cutting device is provided to cut off the remaining end of the material that is larger than the standard length, and a third transport path is connected to the second transport path, on which the standard length material on the second transport path is transferred, and the material is cut off at the appropriate location. A coating device is provided for applying adhesive to the butt end surface and the contact surface of the assembly of the fixed-length materials, and a press device for the assembly of the fixed-length materials is provided in the third conveyance path, and the press device is arranged at a predetermined position on the first conveyance path. A material length measuring device for measuring the length of the material and a material length measuring device disposed on the downstream side of the material length measuring device in the first conveyance path allow only material having a length suitable for predetermined assembly conditions to pass through. Based on the input material selection mechanism to be sent to the process and the material length data input from the material length measuring device, one row of laminated wood or one
Calculating means for calculating seam position data between each material for each material group of layers, storage means for storing these seam position data, and each time material length data is supplied from the material length measuring device. a control device for performing a predetermined control operation on the feed material selection mechanism, the control device having a comparison means for performing a predetermined comparison with joint position data outputted from the calculation means; In this step, the calculation means calculates the difference between the standard length data indicating the standard length of the laminated wood and the seam position data, and when this difference is less than a predetermined length, the length of the material at the rearmost end on the product side is calculated. Controlling the incoming material selection mechanism to select a material such that the length is equal to or greater than a predetermined minimum usable length, and the length of the remaining end cut by the cutting device is equal to or greater than the minimum usable length. 1. An apparatus for producing laminated wood, characterized in that it is equipped with means for issuing a command signal.