JPS6311592B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention provides fixed support frames in multiple stages above and below so that raw veneers can be partially supported in a direction perpendicular to the fiber direction of the raw veneers within the furnace wall, and the veneers of these support frames are An upper stab-type lifting conveyor and a lower placing-type lifting conveyor that move vertically are installed in a space that does not support the veneer. The present invention relates to a device for inserting, placing and removing veneers, and for drying veneers by circulating hot air through a support frame.

Conventional veneer drying has mainly been carried out by providing veneer conveying means such as rollers or wire mesh in multiple upper and lower stages and circulating hot air through these conveyance paths. These conveyance means require a large number of rollers or long wire meshes, resulting in high equipment costs, and require a pair of upper and lower rollers or wire meshes, resulting in a conveyance path with many vertical gaps, making it difficult to fill the furnace volume with veneers. There were also drawbacks such as extremely poor heat efficiency and poor thermal efficiency due to the wasteful amount of heat required to heat the conveying means and the furnace body.

This invention was developed with the aim of solving these drawbacks of the conventional method.Since the veneer is dried by placing it on a fixed support frame with multiple upper and lower stages, the distance between the top and bottom of the support frame can be reduced. It is sufficient to be able to place the veneer, and the vertical pitch of the support frame can be set as small as possible, which greatly increases the filling rate of the veneer. Since the configuration includes an elevating conveyor for inserting and loading veneers into the support frame and taking them out in the space that is not supported, the means of transporting veneers is simplified, and the site area, equipment, and thermal energy are greatly reduced. In addition, since the veneers are inserted in the direction perpendicular to the fiber direction and a large amount of veneer is dried at once, direct connection with the veneer lace is possible, resulting in labor savings for the veneer lace line. Furthermore, by providing two sets of upper and lower elevating conveyors, it is possible to take out the dried veneers in the order in which they were inserted into the support frame, thereby achieving even drying. It is possible.

This invention will be explained with reference to the embodiments shown in the drawings. Reference numeral 1 denotes a drying chamber;
2a and a part of the take-out ports 3, 3a are surrounded by a furnace wall 4 made of a heat insulating material, etc.
A group of drying shelves 5 and 5a each having upper and lower multi-stage support frames for placing veneers are provided. The drying rack 5 has upper and lower multi-stage support frames 7, 7', 7-1, 7'-1, ... 7- fixed to the machine frames 6 and 6', respectively.
7, 7'-7, and each of these support frames can partially support the veneer A inserted from the insertion port 2 in a direction perpendicular to the fiber direction thereof. It is formed to be relatively elongated in the running direction of the veneer, and each support frame is provided so that it can support the veneer A in a generally parallel state, and the upper and lower pitches of each support frame are set as small as possible. In addition, the veneer A to be placed on each support frame is cut in advance to a size according to the length of each support frame, and the veneer A is a single long veneer or the mutual end surfaces of multiple veneers. A suitable veneer such as a butted veneer is made.

Each support frame was configured to partially support the veneer A in the direction perpendicular to the fiber direction of the veneer A, and in the example, partially support the vicinity of both ends of the veneer A. A space B is formed in a direction perpendicular to the fiber direction of the veneer, and a conveyor for inserting and taking out the veneer A is provided in this space B. In addition, the partial support of the veneer by each support frame is not limited to both ends of the veneer as in the example, but the support frame is supported near the center of the veneer A in a direction perpendicular to the fibers. It is also possible to implement the conveyor in the same manner by providing a space B on both sides of the support frame and arranging the conveyor therein. Further, in the embodiment, the support frame is shown as having eight stages, but this number can be provided in multiple stages as necessary, and other drying racks 5
There are also upper and lower multi-stage support frames 7a, 7'a, 7a-1,
7'a-1, . . . 7a-7, 7'a-7 are provided, but since these have the same structure as each support frame of the drying shelf 5, detailed explanation will be omitted.

The upper sticking-type elevating conveyor 8 is attached to a side plate 9 and has a plurality of endless belts 1 on front and rear rotary wheels 10, 10' located near the insertion port 2 and the removal port 3.
1 (two strips in the embodiment), a large number of needle-shaped bodies N are attached to the surface of the endless strip 11, and the running path below them is used as a pricking and conveying path for the veneer A.・It is intermittently driven to travel by a drive mechanism 12 consisting of a brake, etc., and by an elevating mechanism 13 consisting of an appropriate means such as a fluid pressure cylinder,
In the space B of the support frame, the standby position above the uppermost support frames 7, 7' and the lowermost support frame 7-
7, 7'-7 so that it can be moved up and down in the vertical direction, and the veneer A is stably conveyed from the insertion port 2 toward the removal port 3 by the needle-like body N, and inserted into each support frame. It is used for placing and taking out. The sticking-type elevating conveyor 8 includes a pressing bar 14 for pressing the spinal surface of the endless band 11 and sticking the needle-shaped body N to the veneer A placed on the support frame, and a pressing bar 14 that moves up and down. It includes an operating mechanism 15, a knock-off bar 16 for releasing the veneer A stuck to the needle N and placing it on a support frame, and its operating mechanism 17, and a front and rear rotary wheel 10. , 10', and the rear rotary wheel 1.
Veneer A installed near 0' and transported by pricking
It is provided with a detachment body 19, etc., which releases the needles from the sticks of the needle-like bodies N and transfers them to the rear guide conveyor 18'.

The lower placing type elevating conveyor 20 is attached to a side plate 21 and has a plurality of endless belts (two in the embodiment) stretched between front and rear rotary wheels 22, 22' located near the insertion port 2 and the removal port 3. , the upper running path is used as a loading and conveying path for the veneer A, which is located below the upper sticking-type elevating conveyor 8, and is moved intermittently by a drive mechanism 23 consisting of a motor, clutch, brake, etc. By means of a lifting mechanism 24, which is driven to run and is comprised of appropriate means such as a hydraulic cylinder,
In the space B, the space between the uppermost support frames 7, 7' and the lower standby position of the lowest support frames 7-7, 7'-7 is provided so as to be vertically movable, and the veneer A
The conveyor is placed and conveyed from the insertion port 2 toward the take-out port 3 in a direction perpendicular to the fiber direction, and is inserted into and taken out from each support frame. is connected. Incidentally, by attaching needle-shaped bodies or the like to the surface of the endless belt of the stationary lifting conveyor 20, it is possible to prevent slips and the like with the veneer.

The carry-in rotary conveyor 26 has an endless belt stretched between a rotary wheel 27 on the carry-in side and a rotary wheel 27' on the discharge side, and carries veneer A conveyed from a conveyor 28 connected to a conveyor line of veneer lace, etc. is sent to the upper sticking type lifting conveyor 8 or the lower placing type lifting conveyor 20. Carrying-in rotary conveyor 2
6 is provided with a rotary wheel 27 that is slidable back and forth, and is equipped with an operating mechanism 29 consisting of a suitable means such as a hydraulic cylinder that raises and lowers the rotary wheel 27' in the vertical direction. An elevating conveyor 20 connects each support frame 7, 7', 7-1, 7'-1 to 7-7, 7' to insert and place the veneer A.
When it is stopped at a position corresponding to -7, it is stopped correspondingly and the veneer A is sent to these elevating conveyors via the guide conveyor 18 or the auxiliary conveyor 25.

The carry-out rotary conveyor 30 has an endless belt stretched between a rotary wheel 31 on the carry-in side and a rotary wheel 31' on the discharge side, and is taken out by the upper stab-type lifting conveyor 8 or the lower placing-type lift conveyor 20. The veneer A is sent to a conveyor 32 connected to a veneer clipper or the like. The carry-out rotary conveyor 30 is provided with a rotary wheel 31' that can be slid back and forth, and
Equipped with an operating mechanism 33 consisting of appropriate means such as a fluid pressure cylinder that raises and lowers the rotary wheel 31 in the vertical direction, the sticking type lifting conveyor 8 or the placing type lifting conveyor 20 connects to each support frame in order to take out the veneer A. When stopped at the corresponding position, the guide conveyor 18' or the auxiliary conveyor 2
The veneer A conveyed via conveyor 5' is transferred to conveyor 3.
It is sent to 2. Note that the means for stopping the carry-in and carry-out rotary conveyors 26, 30 in correspondence with the lifting conveyors 8, 20 is performed by appropriate means such as having a detector for determining the stop position.

The detectors 34, 34-1, ...34-7 are attached to each support frame 7, 7', 7-1, 7'-1...7-7, 7'-
7, which detects the veneer A conveyed by the upper sticking-type lifting conveyor 8 or the lower placing-type lifting conveyor 20, and in the case of the sticking-type lifting conveyor 8, The detection signal of the front end of the veneer A is transmitted to the drive mechanism 12, the actuating mechanism 17, the lifting mechanism 13, and the actuating mechanism 29, respectively. 8 and the carry-in rotary conveyor 26 are lifted, and the detection signal of the rear end of the veneer A is transmitted to the drive mechanism 12, the lifting mechanism 13, and the operating mechanism 33 via the timer, and the movement of the lifting conveyor 8 is controlled. Stopping, lowering and unloading rotary conveyor 30
, etc. are carried out. In the case of the lower mounted type lifting conveyor 20, the detection signal of the front end of the veneer A is transmitted to the drive mechanism 23, the lifting mechanism 24, and the operating mechanism 29, respectively, and the movement of the lifting conveyor 20 is stopped, lowered, and rotated. The conveyor 26 is lowered, etc., and the detection signal of the rear end of the veneer A is sent to the drive mechanism 23, the lifting mechanism 24, and the operating mechanism 3 via a timer.
3, the movement of the elevating conveyor 20 is stopped and raised, and the unloading rotary conveyor 30 is raised.

Detector 35, 35-1, 35-2,...35-
7 and 35-S are provided near the insertion port 2, and detect the upper stab-type lifting conveyor 8, and transmit the signals to the lifting mechanism 13, the actuating mechanism 15, and the drive mechanism 12, respectively, so that the lifting conveyor 8 These detectors stop the lifting or lowering of the conveyor 8, start its travel, and stick the veneer A by the press bar 14.When the elevator conveyor 8 is stopped in a manner corresponding to each support frame, each of these detectors The vertical conveyor 8 is arranged so that the lower conveyance path is slightly above the mounting surface of the veneer A of each support frame. Detector 36, 36-1,...
36-7 and 36-S are similarly provided near the insertion port 2, and detect the lower mounted type elevating conveyor 20 and transmit the signals to the drive mechanism 23 and elevating mechanism 24, respectively, to control the running of the elevating conveyor 20. In each of these detectors, the elevating conveyor 20 is stopped so that its upper conveyance path is slightly above the veneer placement surface of each support frame. Deploy.

The procedure for inserting and placing the veneer A into each support frame using the upper stab-type lifting conveyor 8 is as shown in Fig. 4e, when the lifting conveyor 8 is activated by the detector 35-7. When the veneer A is stopped at a position corresponding to the lowest support frame 7-7, 7'-7, the veneer A is conveyed to the guide conveyor 18 by the carry-in rotary conveyor 26 due to the pushing force of the rotary wheel 10. (A separate pressure roll may be provided) The needle-shaped body N is stuck and transported in a suspended state, and the front end of the veneer A is attached to the detector 34-7.
When the position is reached, the drive mechanism 12 is activated by the signal.
is actuated, the movement of the elevating conveyor 8 is stopped, and the actuating mechanism 17 is actuated to cause the knock-down bar 16 to reciprocate across the lower running path of the elevating conveyor 8, and the veneer A
is released from the stick of the needle-like body N, and the support frame 7-7,
7'-7. When the removal of the veneer A by the knock-down bar 16 is completed, the elevating mechanism 13 is activated and the elevating conveyor 8 is raised, and the detector 35-6 is activated to correspond to the support frames 7-6, 7'-6. When it stops at the position shown in FIG. In this way, the veneers A are sequentially inserted and placed on the upper support frames, and when the veneer A is placed on the uppermost support frames 7 and 7' as shown in figure f, the detector 35-S As a result of this operation, the elevating conveyor 8 stops at an upper standby position and waits.
In this way, the insertion and placement of the veneer A by the sticking-type lifting conveyor 8 is carried out by its upward movement in one direction, and the veneer A placed on each support frame is moved by the hot air circulation device described later. Drying is carried out by circulating hot air into the region of the support frame.

The procedure for taking out the veneer A that has been dried by the upper sticking-type lifting conveyor from each support frame is as shown in Figure 4c, when the lifting conveyor 8 descends from the standby position and the detector 35 When the actuator stops at a position corresponding to the uppermost support frame 7, 7', the actuating mechanism 15 is actuated by a signal from the detector 35, and the press bar 14 moves once, causing the endless lifting conveyor 8 to move. The spinal surface of the band is pressed and the veneer A is stuck by the needle-like body N. When this sticking is completed, the drive mechanism 12 is activated and the elevating conveyor 8 starts running, and the front end of the veneer A rotates. When the position of the car 10' is reached, the detachment body 19
As a result, the veneer A is released from being stuck by the needle-like bodies N, and is carried out via the guide conveyor 18' to the rotary conveyor 3.
Sent to 0. When the rear end of the veneer A passes the position of the detector 34, the signal is transmitted to the drive mechanism 12 via the timer, and when the rear end of the veneer A has been transferred to the guide conveyor 18', the elevator conveyor 8 stops running. The signal from the detector 34 is also transmitted to the lifting mechanism 13 via the timer, and the lifting conveyor 8 is lowered to move the detector 35-1 corresponding to the next support frame 7-1, 7'-1. The unloading rotary conveyor 30 is also lowered by the operation of the operating mechanism 33, and the veneer A placed on the support frames 7-1 and 7'-1 is taken out in the same manner. . In this way, the veneers A are taken out one after another from each support frame, and the veneers A are taken out up to the lowest support frames 7-7 and 7'-7, as shown in Figure d. In this way, the veneer A is taken out from each support frame by the upper stab-type elevating conveyor 8 by its downward movement in one direction.

The veneer A is transported by the lower placing type lifting conveyor 20.
The procedure for inserting and placing the conveyor into each support frame is as shown in FIG. In the state, the carry-in rotary conveyor 2
When the veneer A sent from 6 via the auxiliary conveyor 25 reaches the position of the detector 34, the drive mechanism 23 and the lifting mechanism 24 are activated by the signal.
When the elevating conveyor 20 stops running, it descends, and as it descends, its upper conveyance path crosses the placement surfaces of the support frames 7, 7', so the veneer A is placed on the support frames 7, 7'. . The descending elevator conveyor 20 stops at a position corresponding to the next support frame 7-1, 7'-1 by the operation of the next detector 36-1.
Further, the carry-in rotary conveyor 26 is also lowered by the actuation mechanism 29 by the detector 34, and the auxiliary conveyor 2
Stop at the position corresponding to 5 and prepare for the next veneer A.
In this way, the veneer A is inserted and placed on the lower support frames in sequence, and as shown in figure b, the lowermost support frame 7-
When the placement of the veneer A on the veneers 7 and 7'-7 is completed, the elevating conveyor 20 stops at the lower standby position and waits due to the activation of the detector 36-S. In this way, the veneer A is inserted and placed on each support frame by the placing type lifting conveyor 20 while the veneer A is moved downward in one direction.

The procedure for taking out the dried veneer A from each support frame by the lower placing type lifting conveyor 20 is as shown in figure g in Fig. 4. support frame 7-7,
When crossing the mounting surface of 7'-7, receive the veneer A,
When it reaches the position of the detector 36-7, the drive mechanism 23 and the lifting mechanism 24 are actuated by the signal, and the lifting conveyor 20 stops rising and starts running, and the veneer A is moved through the auxiliary conveyor 25'. and sent out to the carry-out rotary conveyor 30. Veneer A
When the rear end passes the position of the detector 34-7, the signal is transmitted to the drive mechanism 23, the lifting mechanism 24, and the actuating mechanism 33 via the timer, and the movement of the lifting conveyor 20 is stopped by these operations. It started to rise with the upper support frame 7-6,
When crossing the mounting surface of 7'-6, receive the veneer A,
When it reaches the position of the detector 36-6, the drive mechanism 23 and the elevating mechanism 24 are actuated by the signal, and the elevating conveyor 20 stops rising and starts running. -7 by the operation of the operating mechanism 33, and is stopped at a position corresponding to the auxiliary conveyor 25', and the veneer A is delivered to the carry-out rotary conveyor 30 via the auxiliary conveyor 25'. When the veneer A placed on the uppermost support frame 7, 7' is taken out in this way, as shown in figure h, the elevating conveyor 20 waits at that position and prepares for the insertion of the veneer A. . In this way, the veneer A is taken out from each support frame by the placing type elevating conveyor 20 while the veneer A is moved upward in one direction.

In addition, among the series of figures shown in FIG. 4, figures a to d show the descending process of both elevating conveyors 8 and 20, and figures e to h show each of the veneers A during the ascending process of both elevating conveyors, respectively. One cycle is the reciprocating lifting and lowering of both elevating conveyors by inserting and loading into and taking out from the support frame, but only the descending process shown in figures a to d or only the upward process shown in figures e to h are considered one cycle. In this case, in figures a to d, both lifting conveyors are returned from the state in figure d to figure a, and in figures e to h, both lifting conveyors are returned from figure h to figure e. .

As described above, the veneer A is moved to each support frame 7 by the upper sticking type lifting conveyor 8 and the lower placing type lifting conveyor 20.
7', 7-1, 7'-1...7-7, 7'-7, and how to take it out after drying has been explained. Board A is dried with hot air from a hot air circulation device, and the drying time can be predicted in advance based on the thickness of veneer A, initial moisture content, temperature of the hot air, etc.
If you set the drying time using a timer or the like and take it out when drying is finished, you can automatically insert and take out the veneer A into each support frame. Since the boards are inserted and removed by unidirectional movement of each elevating conveyor up or down, the time each veneer stays in the drying chamber can be made almost equal, and uniform drying can be achieved. It is.

Note that, like the drying rack 5, the drying rack 5a includes an upper pin type lifting conveyor 8a, a drive mechanism 12a, a lifting mechanism 13a, a pressing bar 14a, and its operating mechanism 15.
a, knock-down bar 16a, its operating mechanism 17a,
Guide conveyors 18a, 18'a, detachment body 19a,
Lower mounted lifting conveyor 20a, drive mechanism 23
a, lifting mechanism 24a, auxiliary conveyor 25a, 2
5'a, carry-in rotary conveyor 26a, conveyor 28
a, operating mechanism 29a, unloading rotary conveyor 30a,
Conveyor 32a, operating mechanism 33a, detector 34
a, 34a-1, 34a-2, ...34a-7,
Detectors 35a, 35a-1, ...35a-7, 3
5a-S, detector 36a, 36a-1,...36
a-7, 36a-S, etc., and since these mechanisms are the same as those of the drying rack 5, detailed explanation will be omitted.

The hot air circulation device 37 includes a fan 38, a heater 39 using steam as a heat source, and a guide plate 4 for hot air circulation.
0, 41, partition plates 42, 43, etc., hot air circulates as shown by the arrows in Figure 3, and the hot air acts on the veneer A placed on each support frame to dry it. It is. Depending on the number of stages of support frames, the length of the drying chamber 1, etc., one or more sets of hot air circulation devices 37 are provided for each drying shelf. 5,5a
If the drying rack is installed between the drying racks and hot air is circulated between the two drying racks, power and space can be used effectively. In addition, in the example, there are 5 drying shelves.
Although shown as two sets, 5a and 5a, a plurality of sets may be provided above and below depending on the throughput of veneers, etc.

As described above, this invention has a structure in which the veneer is dried by placing it on a support frame fixed in multiple stages above and below in the drying chamber, so that the space in the vertical direction is used much more effectively than in the conventional method. A large amount of veneer can be dried, and a space is provided by partially supporting the veneer in a direction perpendicular to the fiber direction of the veneer on a support frame. The veneers are placed in the support frame so that they can be raised and lowered, and the veneers are inserted into and taken out of the support frame, which greatly simplifies the means of transporting the veneers. Since the veneers are taken out, the drying time for each veneer is equalized, and since the veneers are placed on top and bottom in multiple tiers for drying, the hot air circulation system is simplified and the space, power, and thermal energy are saved. In addition, by drying a large amount of veneers and automatically inserting and removing veneers, it is possible to directly connect to the veneer lace line, resulting in significant labor savings on the plywood manufacturing line. It has made a great contribution to the plywood industry.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention, and FIG. 1 is a side view, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a sectional view taken along line X-X of FIG. Figures 1 through 5 are explanatory diagrams showing the procedure for inserting and placing the veneer into the support frame and taking it out. 1... Drying room, 2, 2a... Insertion port, 3, 3a
...Take-out port, 4... Furnace wall, 5, 5a... Drying shelf, 7, 7', 7-1, 7'-1 to 7-7, 7'-
7...Support frame, 7a, 7'a, 7a-1, 7'a-
1-7a-7, 7'a-7...Support frame, 8, 8a
... Stick type lifting conveyor, 12, 12a... Drive mechanism, 13, 13a... Lifting mechanism, 14, 14a
... Pressure bar, 15, 15a ... Actuation mechanism, 1
6, 16a... Knock down bar, 17, 17a...
Operating mechanism, 20, 20a... Stationary lifting conveyor, 23, 23a... Drive mechanism, 24, 24a...
...Lifting mechanism, 26, 26a... Carrying-in rotary conveyor, 29, 29a... Operating mechanism, 30, 30a...
... Carrying out rotary conveyor, 33, 33a... Operating mechanism, 34, 34-1 to 34-7... Detector, 34
a, 34a-1 to 34a-7...detector, 35,
35-1 to 35-7, 35-S...Detector, 35
a, 35a-1 to 35a-7, 35a-S...detector, 36,36-1 to 36-7, 36-S...
Detector, 36a, 36a-1, ~ 36a-7, 3
6a-S...Detector, 37...Hot air circulation device, A
...Single plate, B...Space, N...Acicular body.

Claims (1)

[Claims] 1 Fixed support frames provided in multiple stages above and below within the furnace wall so as to be able to partially support the veneer in a direction orthogonal to the direction of its fibers, and spaces in each support frame that do not support the veneer in the vertical direction. An upper piercing type lifting conveyor and a lower placing type lifting conveyor which are movably provided and are driven intermittently to transport the veneer in a direction perpendicular to the fiber direction thereof, and the upper and lower sticking type lifting conveyors and the placing type. It consists of a carry-in rotary conveyor and a carry-out rotary conveyor which are provided on each of the lifting conveyors so as to be able to deliver and deliver veneers, and a hot air circulation device that circulates hot air to the parts of each support frame within the furnace wall. The veneers transferred from the carry-in rotary conveyor by unidirectional movement of the loading type lifting conveyor and the lower placing type lifting conveyor are placed on each support frame in sequence, and then dried. The finished veneer is sequentially taken out from each support frame and sent to the carry-out rotary conveyor by unidirectional movement of the upper sticking type lifting conveyor and the lower placing type lifting conveyor. A drying device for veneers.