JPH049122Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to an apparatus for manufacturing laminated timber in which a large number of short materials are assembled into a plate or column shape of a predetermined size by gluing or the like.

[Conventional technology]

Conventionally, laminated wood is produced by arranging short columnar or plate-shaped materials glued or coated with adhesive on the required surfaces and sequentially conveying them toward a stopper and arranging them in series, and when the total length exceeds the standard length. They are manufactured by cutting off the remaining ends, feeding the regular length materials onto a table, stacking them one above the other when assembling them into a column, or arranging them in parallel when assembling them into a plate, and bonding them together under pressure.

[Problem that the invention attempts to solve]

In the conventional manufacturing technology for laminated wood as described above, the short pieces of columnar or plate-like material that are conveyed one after another are arranged in series, and when the length exceeds the standard length, the remaining ends are cut off to make the standard-length material. If the joints (butting ends of short pieces of material) of rows (or vertically adjacent layers when laminated in a columnar shape) coincide with each other or are too close to each other, the strength of the manufactured laminated timber may be reduced. There were times when it became noticeably weaker. Thus, it goes without saying that the greater the number of seams that coincide or are too close to each other, the more significant the strength reduction will be.

In addition, the material fed at the end of a 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 that time, No consideration was given to the length of the cut material at the rearmost end on the material group side and the length of the remaining end to be cut, resulting in products of inferior quality with defects at the rearmost end, There was a problem in that the amount of the remaining ends that could not be used due to the insufficient length of the removed remaining ends increased, and the material yield of the laminated timber decreased accordingly.

This idea was made in view of the above circumstances,
The purpose is to provide an apparatus for manufacturing laminated timber with improved strength and yield.

[Means for solving problems]

In order to solve the above problems, this idea
A second conveyance path is connected to a first conveyance path through which columnar or plate-shaped short materials are sequentially fed, and this second conveyance path is
One of the laminated timbers arranged in series at the front end of the conveyance path
A stopper is provided to stop the cutting edge material of a row or one layer of materials, and the remaining end of the material for one row or one layer is cut off at the standard length or more to form a standard length material group. A third conveyance path for conveying the set of fixed-length materials thereon is connected to the second conveyance path, and the end surface of the material is further bonded to the side edges or upper and lower surfaces of the set of fixed-length materials. In a glulam lumber manufacturing device that is equipped with a coating device for applying a coating agent at an appropriate location, the first
a material length measuring device for measuring the length of the short material placed at a predetermined position on the conveyance path; and a length measuring device for measuring the length of the short material placed on the downstream side of the material length measuring device in the first conveyance path; an incoming material selection mechanism that allows only short length materials to pass through and be inserted into a second conveyance path, while returning materials unsuitable for the assembly conditions to a supply source upstream of the first conveyance path; and measuring the length of the material; calculation means for calculating seam position data between each material for each set of fixed-length materials based on material length data input from the machine; storage means for storing the seam position data; and the above-mentioned A comparison means is provided which performs a predetermined comparison with the joint position data outputted from the calculation means each time the material length data is supplied from the material length measuring device, and the calculation means is used to determine the standard length of the laminated timber. Calculate the difference between the length data and the seam position data, and when this difference becomes less than a predetermined length, the length of the short material at the end of the set of fixed-length materials will be equal to or greater than the predetermined minimum usable length. and a control device that controls the feed material selection mechanism to select a material such that the length of the remaining end cut by the cutting device is equal to or greater than the minimum usable length. The present invention provides an apparatus for manufacturing laminated wood.

[Effect]

In the laminated timber manufacturing apparatus of this invention having the above configuration, the length of each short material traveling on the first conveyance path is measured by the material length measuring device, and the material length data is input to the 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. 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 amount of material that has just passed through the material length measuring device. It is sequentially determined whether the seam to be formed is separated from the seam closest to it in the material group in the front row by more than a predetermined minimum allowable amount, and furthermore, it is determined whether the difference between the standard length data and the seam position data is a predetermined distance. If the length is below, the length of the material at the rearmost end of the group of standard length materials must be equal to or greater than the specified minimum usable length, and the length of the remaining end cut by the cutting device must be the minimum usable length. The short material to be fed into the second conveyance path is selected so as to meet the above requirements. That is, the incoming material selection mechanism allows only short materials that meet the above-mentioned assembly conditions to be sent to the second conveyance path, and short materials that do not meet these conditions are sent to the supply source upstream of the first conveyance path. Reflux.

In this way, the seams of material in adjacent rows or layers are prevented from coincident or closer together than a predetermined minimum distance, and the length of the material at the rearmost end of the product is kept at the minimum usable length. In addition, the length of the remaining end of the material to be cut out is greater than or equal to the minimum usable length.

〔Example〕

Hereinafter, an embodiment of the laminated timber manufacturing apparatus of this invention will be described in detail with reference to the drawings.

In the illustrated embodiment, reference numeral 1 designates a first conveyance path for sequentially transporting columnar or plate-shaped short materials a forward.
These materials a are arranged in series by receiving them from the conveyance path 1 and placing the cutting edge material a of one row or one layer of short materials of laminated wood on the stopper 2 provided at the front end thereof. A second transport path 3 is connected.

Further, at the rear end of the second conveyance path 3, a cutting device 4 is provided for cutting off the remaining ends of the 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 is connected thereto, onto which the standard-sized material a' is transferred.

In the illustrated case, the third conveyance path 5 is a heating machine 6.
The rear end portions are arranged side by side on one side of the second conveyance path 3, sandwiching the
A veneer 7 arranged in parallel on the remaining side of the second conveyance path 3
is fed from the second conveyance path 3 onto the table 9 of the heating machine 6 while being advanced by the expansion action of the cylinder 8, and by repeating the above, the fixed length material a' is sequentially fed from the table 9 onto the third conveyance path 5. However, the third conveyance path 5 is connected in series to the second conveyance path 3, the standard length material is pushed out to a position where it comes off the stopper, and the standard length material is sent from the second transportation path to the third conveyance path. You can do it like this.

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

Moreover, coating devices 10 and 11 are provided at the above-mentioned appropriate locations 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 solar 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, as shown in FIG. 19 and FIG. At the same time, the veneer plate 40 is advanced by the expansion action of the cylinder 39 arranged on the remaining side of the roller conveyor 22, and the fixed length material a' is fed from the roller conveyor 22 onto the table 38, and the table 38 The end surface of the material a is bonded by the stoppers 41 provided oppositely at both ends of the material A and the veneer 43 which advances due to the expansion action of the cylinder 42, and the regular length material A is further pushed in by the resistance plate 44 on the table 38. There is a case where the plate is used to join the opposite sides of the regular length material a' by providing resistance to the sliding 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 FIGS. 6 and 7, the incoming material selection mechanism 49 selects short materials a that are sequentially transported in the direction of the arrow by the first transport path 1 and that meet predetermined assembly conditions under the control of the control device. The reflux conveyor includes a stopper 50 that prevents materials that do not fit into the second conveyance path 3, and a pusher plate 52 that pushes out the short material a blocked by the stopper 50 to the side and transfers it onto the reflux conveyor 51. 51 sends the material a pushed out by the pusher plate 52 back to a supply source (not shown) on the upstream side of the first conveyance path 1 for reuse. These stopper 50 and pusher plate 52 are driven by cylinder plungers 53 and 54, respectively.

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 one example or one layer of standard length material a' 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,
The material length measuring device 47 sequentially determines whether or not the seam to be formed by the material a that has just passed is separated from the seam closest to it in the material a group in the front row by more than a predetermined minimum allowable length, and based on the results. Therefore, the cylinder control circuit 64 for controlling the driving of the cylinder plungers 53 and 54 is 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 the laminated wood at the front end O. is stored as distance data with the origin as the origin, and when the first material length _G1 in the second column is input from the material length measuring device 47,
The arithmetic unit 60 compares T ₁ ±α (α is a predetermined minimum allowable interval between the joints of two materials a group to be compared) and G ₁ and determines that G ₁ ≦T ₂ −α or T ₁ +α≦G. , then the material a is allowed to be fed into the second conveyance path 3. For example, in FIG. 7, the stopper 50 is open, but this state is maintained in the case of the above comparison results. 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. Only in the case where the material has the same material, feeding of the material to the second conveyance path 3 is permitted.

If the above comparison result is, for example, T ₁ −α<G<T ₂ +α, the arithmetic unit 60 issues a command to the cylinder control circuit 64 to control the cylinder plungers 53 and 5.
4 is driven to close the stopper 50, and the material a blocked by the stopper 50 is transferred onto the reflux conveyor 51 by the pusher plate 52. Cylinder plungers 53 and 5
4 is always in the retracted position unless there is a command from the arithmetic device 60.

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 , ... is 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 operation of the incoming material selection mechanism 49 is controlled by the same process as above for the material groups from the 4th column onwards. .

Further, when the difference between the standard length l 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 rear end on the product side is equal to or greater 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.
A command signal for controlling the cylinder 9 is supplied to the cylinder control circuit 64. 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 finished product. Set. Further, materials whose remaining ends are shorter than this minimum length are recycled by the incoming material selection mechanism to be used at the beginning or middle of the next row of materials. for example,
In FIG. 23, when the difference l- _G5 between the seam position data _G5 calculated by feeding the material _a5 and the standard length l becomes shorter than a predetermined length, the arithmetic device 60
Immediately after that, only when the length of the measured material is longer than the minimum usable length and the length of the remaining end Z is also equal to or greater than the minimum usable length, the material is fed into the second conveyance path 2 as material a ₆ . When the conditions are not met, the incoming material selection mechanism 49 is controlled to cause the material to be refluxed. In this case, when 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 reducing the length of a ₆ after cutting off the extra end. The operation of the feeding material selection mechanism is controlled so that the length is longer than the above-mentioned minimum usable length.

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 idea]

As described above, according to the glulam manufacturing apparatus according to this invention, it is sequentially determined whether the joint to be formed by the materials is separated from the closest joint in the group of materials in the front row by more than a predetermined minimum allowable length. The joints between the front row and the next row, or between the front layer and the next layer, are separated by more than the allowable length while operating the incoming material selection mechanism according to the results, which prevents the strength of the laminated wood from decreasing. In addition, there is no need for labor-intensive finger joint processing, and furthermore, the material yield of laminated wood can be significantly improved.

[Brief explanation of drawings]

Figure 1 is a plan view of the manufacturing equipment, Figures 2 and 3 are perspective views of the laminated timber according to this invention, Figure 4 is a side view of the material length measuring device, Figure 5 is a front view of the same, and Figure 5 is a front view of the same. 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... Elevating 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... Incoming material selection mechanism, 50... Stopper, 51... Return conveyor,
52... Pusher plate, 53, 54... Cylinder plunger, 60... Arithmetic device, 61...
Storage device, 64... cylinder control circuit.

Claims (1)

[Scope of claim for utility model registration]
A second conveyance path is connected to the conveyance path, and a stopper is provided at the front end of the second conveyance path to stop the most advanced material of one row or one layer of laminated wood materials arranged in series. A cutting device is provided at the rear end of the material for one row or one layer to obtain a group of standard-length materials by cutting off the excess end of the material for one row or one layer, and the standard-length material on the second conveyance path is 3rd stage for transporting material group
In a glulam manufacturing equipment that connects conveyance paths and is further provided with an applicator at an appropriate location for applying adhesive to the end surface of the material and the side edges or upper and lower surfaces of a group of fixed length materials: At a predetermined position of the first conveyance path. a material length measuring device for measuring the length of the arranged short materials; a material length measuring device disposed on the downstream side of the material length measuring device in the first conveyance path; measuring only the short materials having a length suitable for predetermined assembly conditions; an incoming material selection mechanism for passing and feeding short materials unsuitable for the assembling conditions into a second conveyance path and returning them to a supply source upstream of the first conveyance path; calculation means for calculating seam position data between each material for each set of fixed-length materials based on material length data, storage means for storing the seam position data, and the material length measuring device. and a comparison means for performing a predetermined comparison with the seam position data output from the calculation means each time the material length data is supplied from the calculation means, and the comparison means performs a predetermined comparison with the seam position data output from the calculation means, and the comparison means performs a predetermined comparison between the standard length data indicating the standard length of the laminated wood and the above-mentioned standard length data by the calculation means. Calculate the difference from the seam position data, and when this difference becomes less than a predetermined length, the cutting device A control device for controlling the feed material selection mechanism to select a material such that the length of the remaining end portion to be cut out is equal to or greater than the minimum usable length; Device.