JPH0212858B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multi-stage conveyor in which a plurality of conveyors are provided above and below to continuously convey plate-shaped objects such as veneer veneers (hereinafter referred to as veneers) at predetermined intervals in the conveying direction. The present invention relates to a device that collects the plate-like bodies on a single-stage conveyor and carries them out.

Conventionally, in this type of equipment, the plate-like objects collected on a single-stage collection conveyor are sometimes carried out in a crowded manner, and other times in a sparsely packed manner, and the collection and conveyance are carried out in an orderly manner. There was no order, and the operation was limited to simply transporting the plate-shaped objects from the multi-stage conveyor. Therefore, it is extremely difficult to make the next process that continues on one stage of conveyor into a continuous process, and currently, the plate-like bodies are forced to be piled up one at a time at the end of the conveyor where the plate-like bodies are gathered. .

The present invention eliminates the above-mentioned drawbacks, and provides a device in which the plate-like bodies can be collected and conveyed at a predetermined interval on a conveyor on which the plate-like bodies are collected, instead of being deposited in the conventional manner. The purpose is to further improve workability, facilitate automatic deposition, and enable continuity with the next process.

The details of the present invention will now be described by taking an example in which the present invention is implemented in a roll dryer 8 for drying veneer veneers as illustrated in FIGS. 1 and 4.

In the figure, 1a to 1d form a conveyance path for the roll dryer 8, and are called a first conveyor, and although only one part is shown in the figure, it is constructed by connecting a large number of pairs of rolls. The first conveyors are arranged in a vertically stepped manner, and each conveys the veneer 7, which is a plate-shaped body, at a predetermined interval in the conveyance direction (in the direction of the arrow) at a predetermined speed. Next, second conveyors 3a to 3d connected to the terminal ends of the first conveyors 1a to 1d are respectively provided, and the terminal ends of the other second transport conveyors are made to face the lowermost collecting second conveyor, that is, as shown in FIG. In the example, the second
Similarly, in the example of FIG. 4, the conveyor 3a and the second conveyors 3a and 3c are set as the lowermost collecting second conveyors, and the terminal ends of the other second transport conveyors are set as the collecting points, respectively, and the lowermost stage is set as the collecting point. Lower concentration 2nd
The conveyor is configured to collect the veneers 7 from another second conveyor. At the connection point between the first conveyor and the second conveyor, there are variable speed rolls 2a to 2d that rapidly change the conveyance speed of the veneer 7 from the conveyance speed of the first conveyor to the conveyance speed of the second conveyor. establish. For example, a variable speed roll 2 as illustrated in FIG. 3 is used. That is, under normal conditions, the chain 2 is connected via the sprocket 22 and the one-way clutch 4 in the same way as the roll 1 of the first conveyor.
However, by utilizing the characteristics of the one-way clutch, the drive system (not shown in this figure) that drives the roll 3 of the second conveyor and the variable speed roll 2 can be electromagnetically connected as needed. They are connected via a clutch or the like, and the speed is rapidly changed to the conveyance speed of the second conveyor for collection and conveyance while the veneer 7 is held between a pair of rolls. Of course, although not shown, there are various speed selection mechanisms,
The number of the speed change rolls 2 (defining the range where speed change is possible) is determined as necessary. In addition, it is also possible to use a pressure roll that moves up and down at the starting end of the second conveyor at appropriate times to rapidly change the speed of the veneer 7. In short, it is sufficient to provide a speed change mechanism that rapidly changes the speed of the single plate 7 as described above. In addition, in order to obtain a good shift of the entire veneer 7 during gear shifting, it is desirable to use an elastic material with a large coefficient of friction, such as sponge, rubber, or urethane, for the contact surface of the transmission mechanism with the veneer.

In the above configuration, a control mechanism for operating the speed change rolls 2a to 2d will be explained based on FIG. 1.

In the figure, 18 is a main motor, and the first conveyors 1a to 1d of the roll dryer 8 are connected to the second conveyors 3a to 3d via a transmission 19.
are driven via the transmission 19 and another transmission 6a or 6b or 6c or 6d, respectively. Also,
Reference numerals 4a to 4d are one-way clutches that form the main body of the above-mentioned speed selection mechanism, and as shown in the figure, one side directly connects the drive system of the first conveyors 1a to 1d, and the other side connects the electromagnetic clutches 5a to 5d. A drive system for the second conveyors 3a to 3d is introduced through the conveyor. Therefore, the electromagnetic clutches 5a to 5d
is in the OFF state, the speed change rolls 2a to 2d
is the conveyance speed of the first conveyor 1a to 1d, and conversely
As described above, in the ON state, the second conveyors 3a to 3d are driven at the appropriate conveyance speed. Therefore, the speed change rolls 2a to 2d are controlled by the electromagnetic clutches 5a to 5d from the controller 16, respectively.
It will be activated based on the control signal sent to.

The controller 16 that activates the speed change rolls 2a to 2d in this manner is configured to function as follows. now,
Veneer 7 using a well-known and commonly used veneer auto feeder
The first conveyors 1a to 1 of the roll dryer 8
To describe an example in which conveyors are sequentially conveyed to conveyors 1a to 1d, the controller 16 sends the automatic conveyor to A command signal is issued to activate the feeder, and each first conveyor 1
The veneers 7 are continuously carried in at predetermined intervals from a to 1d (not shown). and,
A command signal to the auto feeder is shifted within the controller 16 as the first conveyor transports, and the transport state of the veneer 7 is processed as the transport of an electrical signal.
The controller 16 is configured to issue a control signal to the corresponding electromagnetic clutches 5a to 5d each time the veneer 7 arrives at each of the variable speed rolls 2a to 2d.

Similarly, whether directly or indirectly, a pulse is transmitted in connection with the veneer loading operation of the auto feeder, and the speed roll 2a responds to the pulse immediately or with an appropriate delay. to 2d.

Although not shown, a simple method is to install a single plate detector such as a phototube near the front or rear of the speed change roll to detect the actual object, and to control the controller based on the detection signal of the single plate detector. 16 to generate a control signal for the electromagnetic clutch.

In any case, the tip of the veneer 7 is connected to the speed change roll 2.
Preferably, the controller 16 is configured to issue a control signal and activate the speed change roll after passing through a certain distance from a to 2d. In particular, when the veneers 7 are transported as a set of a plurality of veneers 7 as shown in FIG. At that point, preferably after passing the distance where the disturbance will occur, the speed change rolls 2a to 2d are activated. still,
The time interval during which the speed change roll is activated is sufficient until the veneer 7 finishes passing.

On the other hand, regarding the positions of the speed change rolls 2a to 2d, what should be noted here is their mutual relationship. In Figures 1 and 4,
The respective speed change rolls 2 are placed at positions such that the veneers 7 arrive at the respective speed change rolls sequentially with a predetermined time lag.
A to 2d are provided. That is, in the example of FIG. 1, the speed change rolls 2a→2c→2d→2b→2
a→, and so on, and they arrive repeatedly with a certain time lag, and in the example in Figure 4, one of them is,
2a → 2b → 2a →, the other one is 2c → 2d → 2c →
In this way, the veneers 7 arrive at intervals of a certain period of time. By doing so, each of the other second conveyor conveyors can be set at a conveyance speed such that there is no relative speed difference with respect to the second conveyor at the bottom stage. , the items carried out from the variable speed rolls at a fixed timing are transferred to the second conveyor without disturbing their relative positional relationship.
Furthermore, it is collected on the second collection conveyor at the bottom stage.
For example, in FIG. 1, if the conveyance speed of the first conveyor is V ₁ , then the second conveyor 3 at the bottom
a is more than twice the number of stages of the above V ₁ , that is, the speed is more than 4V ₁
V ₂ , and the speed of the other conveying second conveyor is somewhat higher than said V ₂ , i.e. the other second conveyor 3 with respect to the lowermost collecting second conveyor 3a.
If the inclination angles of b, 3c, and 3d are θ, then the speed V ₃ is set to approximately (1/cos θ)×V ₂ . By doing so, there will be no relative speed difference between the second collecting conveyor 3 and other second conveyors, and the veneers 7 can be collected at a predetermined interval as desired without overlapping each other as shown in the figure. can.

On the other hand, in the example shown in FIG. 4, the mutual positional relationship between the speed change rolls is apparently shifted from that in FIG. 1. Therefore, if the mutual conveyance speeds of the two second conveyors are set according to the above-mentioned relational expression, disturbance occurs when the veneers 7 are assembled due to the apparent deviation. Therefore, in such a case, the second
The distance from the collecting point where the veneers 7 carried out from the conveyors 3a and 3b are collected (the point where the extension line of the second conveyor 3b intersects with the second conveyor 3a) to the variable speed rolls 2a and 2b, The respective transport speeds are set as much as possible so that the veneers 7 are transported in the same amount of time. By doing so, even in the case as shown in FIG. 4, the veneers 7 can be gathered together at a predetermined interval without overlapping each other as desired.

In this way, the timing at which the veneers 7 arrive at the speed change roll is set at regular intervals (in time or distance).
If the configuration is based on installing variable speed rolls in a staggered relationship, the relationship between the gathering and second conveyor conveyors that control the subsequent conveyance will be substantially the same as described above. This eliminates the difference in conveyance speed, keeps the relative positions of the veneers arriving at the variable speed roll unchanged, and prevents them from converging.

In addition, the second collection at the bottom, which corresponds to the collection conveyor,
It is desirable that the conveyance speed of the conveyor be at least twice the conveyance speed of the first conveyor, but it may be lower than that if unnecessary. The state can be carried out at predetermined intervals.

Further, the veneers 7 gathered at a predetermined interval are connected to an orthogonal conveyor 10 whose conveying direction is perpendicular to each other, as shown in FIGS. 1, 2, and 4. A pinch roll 9 that rotates at high speed is provided at the connection point to the orthogonal conveyor 10, and an operating mechanism 17 for moving one of the pinch rolls up and down is connected to the controller 16 described above. Therefore, if activated in a timely manner, it is possible to achieve a continuous process with the next process while maintaining a state with a predetermined interval. Further, in some cases, instead of the orthogonal conveyor 10, the take-out conveyor 11 may be moved in the direction of the arrow to manually or automatically deposit the veneers at the deposition location indicated by 12. In this case, the fourth
In the example shown in the figure, the second conveyor 3c is moved as shown by the two-dot chain line to deposit the entire amount at the same deposition location.

In addition, if the veneer welding machine 15 is an intermittent type,
The conveyor 14 for carrying in the welding machine is of course an intermittent type, but the conveyor 13 that is located in front of the insertion conveyor 14 and continuously conveys
In relation to the insertion conveyor 14 that moves intermittently, it is extremely effective to use a material that has a small coefficient of friction with the veneer 7 for connection. That is, as shown in FIG. 2, the transport conveyor 13 continuously transports the veneer 7, while the insertion conveyor 14 is of an intermittent type, so in order to achieve harmony, there is an imbalance in the upper direction in the transport direction. Occasionally, the veneer is slipped to improve work efficiency for workers.

The present invention described in detail above is not limited to veneers, but can be applied to plate-shaped bodies having predetermined dimensions such as glass, plastic, plywood, tin plate, and leather. It should be made clear that the present invention is applicable not only to the roll dryer mentioned in the example, but also to a multi-stage conveyor formed of conveying members such as chains and net belts.

[Brief explanation of drawings]

1 and 4 are side views of the embodiment, FIG. 2 is a plan view illustrating a mode of carrying out the plate-shaped body, and FIG. 3 is a partial side view of the embodiment. In the figure, 1a to 1d...first conveyor, 2a to 2d...speed change roll as a transmission mechanism, 3a to 3d...second conveyor, 4a to 4d...unidirectional clutch such as a cam clutch, 5a to 5d...electromagnetic Clutch, 6a to 6d...transmission, 7...veneer, 8...roll dryer, 9...pinch roll, 10...orthogonal conveyor, 15...veneer joining machine, 16...controller, 18... ...the main motor...

Claims (1)

[Claims] 1 At the end of a first conveyor that continuously conveys plate-like objects at a predetermined interval in the conveying direction in a plurality of n stages in the upper and lower stages, the first conveyor at the lowest stage is connected to the starting end of the second conveyor, and the other Each of the starting ends of the second transport conveyor is connected to the first conveyor, and furthermore, the terminal end of the second transport conveyor is arranged so as to face the collection point respectively set on the collection second conveyor, and , the conveyance speed of the second gathering conveyor and the second conveyance conveyor is n times or more the conveyance speed of the first conveyor, and the plate-shaped object is conveyed from the starting end to the gathering point by any of the second conveyance conveyors. and the time for conveying from the starting end of the second gathering conveyor to the gathering point corresponding to the arbitrary second conveying conveyor,
Furthermore, the first conveyor and the second gathering and conveying conveyor
A variable speed mechanism such as a variable speed roll for rapidly changing the conveyance speed of the plate-shaped object to the conveyance speed of the second conveyor for gathering and conveying is provided at the connection point with the conveyor, and on the other hand, the plate-like object arrives at the connection point. A device for collecting plate-like objects from a multi-stage conveyor, which is provided with a control mechanism that activates each of the transmission mechanisms until the plate-like objects pass each time.