JP2002028903A - Method for winding veneer single plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress a positional deviation of a veneer single plate cut near a crack of the veneer single plate disposed at an outermost side of a rolled veneer on a veneer single plate already cut due to the crack or a veneer single plate or the like being cut into a predetermined size at each predetermined length when the veneer single plate is sequentially wound on a periphery of a winding shaft together with a wire material by disposing the wire material at an outer peripheral side of the plate. SOLUTION: A method for winding the veneer single plate comprises the steps of gradually increasing a tension of the wire material 9 by letting correspond to an increase in a diameter of the rolled veneer 3 in association with winding of the veneer single plate 10 in the case of disposing the wire material 9 on the outer peripheral side of the veneer single plate 10 and sequentially winding the single plate 10 together with the wire material 9 on the periphery of the winding shaft 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a winding method for sequentially winding veneer veneers around a winding shaft.

[0002]

2. Description of the Related Art Conventionally, for example, "Reeling Unit for Veneer Veneer" (Japanese Patent Publication No. 2-40482) / "Method and Apparatus for Winding Veneer Veneer Using Wire" (JP-A-11-193151) When a veneer veneer is sequentially wound around a winding shaft as described in "Veneer veneer winding device" (Japanese Patent Laid-Open No. 2000-61909), a yarn is wound on the outer peripheral side of the veneer veneer. Position the wire such as a strip,
A winding method for sequentially winding veneer veneers together with the wire is known.

[0003] According to the winding method, the veneer veneer can be forcibly guided around the winding shaft by the wire material, so that the veneer veneer is incomplete or discontinuous with decay, cracks, or the like. Is strip-shaped, but in practice, even veneer veneers that have already been cut to a fixed length for each predetermined length can be sequentially wound into cylindrical rolls, and veneer veneer processing Was useful for streamlining.

[0004]

By the way, in carrying out the above-mentioned winding method, the tension applied to the wire rod has not been specially devised so far, and is always constant from the beginning to the end of the winding. It was customary to use a tension of
In the development process of the present invention, it has been found that there is a problem in such a setting in which the tension of the wire is always constant, when detailed examination is performed.

[0005] That is, if the tension of the wire is set relatively large (strong) in the initial stage of winding, for example, the rotation of the winding shaft is hindered, and the cutting speed of the veneer veneer and the winding speed are reduced. Synchronization with the take-up speed becomes difficult, or, for example, the tightening force in the centrifugal direction of the wound ball caused by the tension of the wire (the component force of the tension in the centrifugal direction of the wound ball) becomes excessive, and veneer unit Since the plate is excessively tightened and inconveniences such as difficulty in regulating the winding position (width direction) of the veneer veneer occur, the tension of the wire is made relatively small (weak) and is always kept constant. However, even when such a configuration is employed, the problem is unnoticeable when winding a conventional relatively thin veneer veneer.

However, in detail, when the diameter of the wound ball increases with the winding, the action direction of the tension of the wire gradually approaches the tangential direction of the outer periphery of the wound ball, so that the tension of the wire is caused by the tension of the wire. The tightening force in the centrifugal direction of the wound ball gradually decreases,
Since the tightening (restraint) of veneer veneer also gradually becomes loose, veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer A veneer veneer or the like that has been cut to a fixed size is likely to be misaligned, and if any part of the misalignment occurs, the posture (rolling appearance) of the wound ball deteriorates, and subsequent winding becomes unstable. This is a problem. Particularly, when the winding temporarily stopped during the processing is restarted, or when a relatively thick (heavy) veneer veneer is wound, there is a tendency that the misalignment is likely to occur.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problem, and it is an object of the present invention to increase the diameter of a wound ball associated with winding a veneer veneer when the winding method is carried out. In this case, the tension of the wire is gradually increased.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the embodiments illustrated in the drawings. FIG. 1 is a schematic side view, partially broken away, of a winding device used for carrying out the present invention. 2 to 5 are side operation explanatory diagrams of the winding device illustrated in FIG. 1, and FIG. 6 is an explanatory diagram of an actual line illustrating an example of a control mode of the tension of the wire.

In FIG. 1, reference numeral 1 denotes a conveyor having a plurality of belts 1a arranged side by side at appropriate intervals, a pulley 1b on which the belt 1a is stretched, a drive shaft 1c fitted with the pulley 1b, and the like. With the drive action of a drive source (not shown) such as a servo motor, the veneer veneer 1 is driven at appropriate speed, for example, at a speed synchronized with a preceding veneer race (not shown).
0 is conveyed in the direction indicated by the arrow.

Reference numeral 2 denotes an appropriate number of grooves 2a through which a belt 1a of the conveyor 1 and a supply nozzle 4a of a wire supply mechanism 4 described later can intervene separately (or at least partially together). A touch roll, which is driven by the same driving source as that of the conveyor 1 or another driving source (not shown) to be appropriately rotated at a speed synchronized with the conveyor 1, Is imparted with rotation directly or indirectly to the object. If necessary, the outer peripheral portion of the touch roll 2 may be provided with an elasticity-imparting coating using various rubbers or the like, or a friction enhancing coating using abrasive cloth, various rubbers or the like.

Reference numeral 3 denotes a freely rotatable winding shaft which is provided above the touch roll 2 so as to be able to move up and down. Then, the veneer veneer 10 is sequentially wound together with the wire 9 as described later. Although not shown, a take-up shaft elevating mechanism having a bearing housing, an elevating screw, a screw drive source, and the like is detachably attached to the take-up shaft 3 so that the take-up shaft 3 can be connected to the touch roll 2 at the time of winding operation. It is preferable that the contact strength can be adjusted automatically (or manually) separately for the left and right sides, because the posture of the wound ball 30 (see FIG. 5) can be easily improved. It is not limited to
For example, it is also possible to adopt a configuration in which the veneer veneer 10 naturally rises following the winding of the veneer veneer 10 (formation of the ball 30).

4 is a through hole 4b, a notch 4c,
A wire rod supply mechanism having a supply nozzle 4a provided with a fluid supply pipe 4d and the like and a wire rod cutting member 5 described later,
An appropriate number of two or more connecting rods 6 described below are appropriately spaced from each other.
And is provided so as to be able to reciprocate intermittently between a start position shown by a solid line and an operation position shown by a dotted line, and supplies the timely wire 9 around the winding shaft 3 and the timely wire 9 And cut off the supply.

More specifically, each supply nozzle 4a is provided with a through hole 1b extending from the rear end to the front end of the core of the pencil rocket-shaped main body, and a notch 4c facing the through hole 1b at an intermediate portion.
A fluid supply pipe 4d communicating with the through hole 1b is provided at a rear portion. At the start of winding, a fluid supplied through the fluid supply pipe 4d (compressed air is convenient, It is also possible to use a mixture of air and water, or only water) and discharge the wire 9 supplied through the notch 4c from the tip, and to remove only the wire 9 during the winding operation. Derived from the tip.

On the other hand, the wire cutting member 5 is located at a position closer to the tip than the notch 4c of the supply nozzle 4a, and at or near the through hole 1b, a wire cutting member such as an electric heater or knife. Tool (not shown), the wire cutting tool is operated only at the end of winding, and the through-hole 1b is provided.
The wire 9 is cut inside.

Reference numeral 6 denotes a connecting rod for connecting the appropriate number of wire feeding mechanisms 4 in parallel via a washer 6a. The connecting rod 6 includes an advance / retreat device 11 for the wire feeding mechanism and a lifting / lowering device 13 for the wire feeding mechanism, which will be described later. , The wire feeding mechanisms 4 are simultaneously moved intermittently.

Reference numeral 7 denotes a cabstan roll 7a which can be driven at least in the direction of the arrow shown in the figure by driving an appropriate driving source (not shown), and a control position indicated by a solid line by the operation of an appropriate reciprocating mechanism (not shown). And a idle roller 7b intermittently reciprocating between a standby position indicated by a dotted line and a idle roller 7b, wherein an appropriate number of wire feed control mechanisms are provided at positions corresponding to the respective wire feed mechanisms 4. At the start of winding,
The supply amount of the wire 9 is controlled as desired. By providing the cabstan roll 7a so as to be drivable in the direction opposite to the direction of the arrow shown in the figure, it is also possible to apply an appropriate tension to the wire 9 at the end of winding, thereby promoting the cutting of the wire 9.

Reference numeral 8 denotes a gate tension (also referred to as grid tension / finger tension) comprising a pair of fixed gates 8a and movable gates 8b, and a fluid cylinder 8c for urging the movable gate 8b toward the fixed gate 8a.
A suitable number of wire tension control devices having a fixed gate 8a and a fixed gate 8a by adjusting the pressure or flow rate of the fluid introduced into the fluid cylinder 8c. By changing the manner of engagement with the movable gate 8b, a desired tension is applied to the wire 9 during the winding operation. In addition, as is well known, when using this kind of tension member to apply an appropriate tension to the wire, a slight braking force is applied to the wire led out from the wire housing member such as a bobbin to the tension member, It is customary to suppress the slack of the wire being derived, and although not shown,
Also in this example, it is desirable to apply a slight braking force to the wire being led out as usual (using an appropriate braking member).

The wire is preferably a single yarn used as a woven material, particularly a single yarn composed of a plurality of continuous filaments, from the viewpoint of conformability, and in a practical example, a commercially available 500 denier, 1000 denier, 1500 denier. Although polyester yarn such as denier was used, it is not necessarily limited, and for example, a single-line shape such as fishing line can be used. In addition to chemical fibers, natural fibers and glass fibers can be used. -Metal fibers and the like.

Incidentally, denier is a unit of thickness of a fiber yarn indicating "grams of mass per 9000 m of length", and the larger the numerical value, the thicker (stronger) the yarn. For example, since the breaking strength of a 500 denier polyester yarn is about 2.5 kg, when a higher tension is required, 1000 denier or 15 denier is required.
00 denier yarn will be used.

Reference numeral 11 denotes an advancing / retreating device of a wire feeding mechanism constituted by using a fluid cylinder.
At the same time, the wire feed mechanisms 4 are simultaneously retracted to the starting position indicated by the solid line via the connecting rod 6, and at the time of the winding operation, the wire feed mechanisms 4 are simultaneously advanced to the operating position indicated by the dotted line.

Numeral 13 denotes a lifting / lowering device of a wire feeding mechanism constituted by using a fluid cylinder.
The respective wire rod supply mechanisms 4 are simultaneously raised to the starting position indicated by the solid line via the connecting rod 6 and the support base 12, and before the winding operation, the respective wire rod supply mechanisms 4 are simultaneously moved directly below the starting position. (See FIG. 2).

Each of the fluid cylinders used in the wire rod tension control device, the wire rod feeding mechanism advancing / retracting device, and the wire rod feeding mechanism elevating / lowering device has a different function such as a crank mechanism and a cam mechanism. The device may be replaced with any other device. In short, any device capable of moving the movable gate, the wire supply mechanism, and the like to a desired position is sufficient.

The present invention is embodied using, for example, the winding device having the above-described configuration. Hereinafter, a series of operations from the start of winding to the end of winding will be described with reference to illustrative drawings. And will be described sequentially. When the winding device having the above configuration is used, as a winding preparation step, each time a new wire 9 is loaded (filled) from a wire material accommodating member (not shown) such as a bobbin to the winding device. Preparation work is required to introduce the leading edge of the nozzle 9 into the through hole 4b through the notch 4c of the supply nozzle 4a.

At the start of winding, the conveyor 1, the touch roll 2, and the wire tension controller 8 are each in a resting state, and the winding shaft 3 is loaded on the upper portion of the touch roll 2, and the wire is further moved. By the operation of the forward / backward device 11 of the supply mechanism and the elevating device 13 of the wire supply mechanism, each wire supply mechanism 4 is brought into a state where it is located at the starting position. Therefore, if the veneer veneer unsuitable for winding is to be separately transferred to the subsequent stage for processing, the transport conveyor is operated in advance and the unnecessary veneer veneer is discharged to the subsequent stage of the winding device. deep.

In the above state, each wire rod supply amount control mechanism 7
When the cabstan roll 7a is driven and the idle roll 7b is moved from the standby position to the control position, the wires 9 are sequentially fed out toward the respective wire feed mechanisms 4, so that at a time before or after the time (too early) Fluid is wasted, and if it is too late, the wire 9 may be stuck and clogged. Therefore, it is preferable that the wire rod 9 is almost at the same time.) Is supplied, the wire 9 is discharged together with the fluid from the tip of each supply nozzle 4a, and initially extends toward the upper side of the winding shaft 3, but the fluid gradually stalls away from the tip of each supply nozzle 4a. Therefore, the distal end side of the wire 9 also hangs down gradually as illustrated in FIG. In the case where compressed air is used as the fluid, if the supply of the compressed air is performed continuously, unnecessary spirals are likely to be generated in the cut-out portions of the supply nozzles and inside the through holes, and the wire rod is not used. Since the supply tends to be slightly unstable, in this case, it is preferable that the supply of the wire and the supply of the compressed air by the wire feed amount control mechanism be performed intermittently.

When the supply amount of the wire 9 reaches a desired amount, the supply of the fluid and the wire 9 is stopped, and the lifting device 13 of the wire supply mechanism is operated as shown in FIG. The mechanisms 4 are simultaneously lowered directly below the starting position, and then, as illustrated in FIG. 3, the advance / retreat device 11 of the wire supply mechanism is operated to simultaneously advance each wire supply mechanism 4 to the operation position. Note that, with the movement of each wire rod supply mechanism 4, a phenomenon occurs in which the distal end side of the wire rod 9 is slightly pulled back. Therefore, even if such a phenomenon occurs, as shown in FIG. It is important to determine the supply amount of the wire 9 so that the side can remain at a position necessary and sufficient to cross the path of the veneer veneer 10.

When the above-described starting operation is completed, the conveyor 1, the touch roll 2, and the wire tension controller 8 are operated to start winding, and as shown in FIG. 3, the veneer conveyed by the conveyor 1 is started. While the veneer 10 is engaged with the distal end of the wire 9 at its distal end, the winding shaft 3
, And further, as illustrated in FIG. 4, receiving the guide action of the wire 9 led out from the tip of each supply nozzle 4 a,
Since the forcible guide is forcibly guided around the winding shaft 3, by continuing this operation state, as shown in FIG.
The veneer veneer 10 can be sequentially wound to form a wound ball 30.

However, in the present invention, as shown in the example of FIG. 6 (curve indicated by the symbol T), the tension of the wire is gradually increased in response to the increase of the diameter of the wound ball. Specifically, the pressure or flow rate of the fluid introduced into the fluid cylinder 8c of each wire rod tension control device 8 is increased in accordance with the increase in the diameter of the wound ball 30, and the engagement between the fixed gate 8a and the movable gate 8b is increased. Is changed from a shallow mode to a deep mode, the degree of winding of the wire 9 around each of the gates 8a and 8b increases,
Accordingly, the passage resistance of the wire 9 also increases, so that the tension of the wire 9 can be gradually increased. Incidentally, the curve indicated by the symbol T in FIG. 6 is an actual example line showing an example of a tension control mode when a 500 denier polyester yarn is used.

Since the tightening force in the centrifugal direction of the wound ball caused by the tension of the wire tends to continuously decrease at an accelerated rate as the diameter of the wound ball increases, the example shown in FIG. ,
On the contrary, the tension is continuously increased at an accelerated rate. However, the tension is not necessarily limited and is not shown. For example, the tension may be increased continuously and linearly (directly proportionally). Alternatively, for example, even if the tension is gradually increased stepwise by dividing the diameter of the wound ball, it is effective if the tension is gradually increased in accordance with the increase of the wound ball diameter.

Then, at the end of winding, preferably, the wire rod 9 is wound around the outer periphery of the wound ball 30 by an appropriate number of times, and then the wire rod cutting member 5 of each wire rod supply mechanism 4 is operated.
By simply cutting the wire 9 inside the through hole 1b of each supply nozzle 4a and transferring the wound ball 30 to the subsequent stage of the winding device,
Although the processing is completed, since the wire 9 is cut inside the through hole 1b of each supply nozzle 4a, the winding processing can be repeated one after another by reproducing the same operation.

Of course, in the course of the processing, it is possible to temporarily stop the operation of the transport conveyor and the touch roll and restart the winding as it is without any trouble. If there is a margin in the diameter of the wound ball, Even after winding of the veneer veneer previously processed is completed, the wire rod is not cut, but is kept as it is (or if necessary, the wound ball having a sufficient diameter and each wire rod supply mechanism are provisionally connected). After removing the unneeded veneer veneer to the subsequent stage of the winding device by operating the transport conveyor and returning the wound ball and each wire rod supply mechanism which have been separated upward to the lower position again. It is also possible to start winding the veneer veneer to be processed next. When the wound ball and each wire rod supply mechanism are temporarily detached and returned, if the wound ball and each wire rod supply mechanism are detached and returned while lightly contacting each other, the winding in the detaching and returning process can be performed. This is effective because the idling and loosening of the ball can be suppressed.

The interval of the wire rods depends on the properties of the veneer veneer to be processed (whether or not it is cracked or cut) and the thickness, the processing speed of the veneer veneer, and the tensile strength of the wire used. It can be set appropriately, but it is possible to use a polyester yarn of about 500 denier to 1500 denier as a wire and a veneer veneer having a thickness of about 0.5 mm to 4 mm at a processing speed of up to 120 m / min. In the case where the treatment is carried out by using a pressure of about 40 cm to about 80 cm, a tentative standard can be cited.

The illustrated example is an example using a winding device of a type having a fixedly provided conveyor, a touch roll, a wire supply mechanism, and the like, and a movable winding shaft. The winding device used for carrying out the present invention is not limited to the type shown in the figure, and is not shown. For example, a transport conveyor, a touch roll, a wire supply mechanism, etc. are movably provided, and the winding shaft is fixed. Or a type in which the drive roller is provided with the function of a touch roll on the drive pulley of the conveyor, and the touch roll is omitted. In addition, a conventionally known winding device of various types such as a type in which the tip of the wire is fixed to a winding shaft and the same wire is repeatedly used for winding and rewinding is used. Rukoto are possible, an exceptional but are not limited.

Accordingly, the wire supply mechanism is not limited to the form using the supply nozzle shown in the figure, and is not shown. For example, a bobbin-like form also serving as a wire-storing member, or a spinning reel-like form for fishing, for example. It is acceptable to use various forms, such as the form described above. In short, it is sufficient to use a function of supplying a wire to a desired position, and it is necessary to provide a wire cutting member. However, it is possible to change the design appropriately in accordance with the form of the wire supply mechanism, and the necessity and form of the wire supply amount control mechanism can be determined. The design may be changed as appropriate according to the form of the wire supply mechanism.

Of course, the form of the wire rod tension control device is not limited to the form using the illustrated gate tension, and is not shown. For example, a form using another conventionally known tension member (for example, A number of different types of tension members are commercially available, and if necessary, two or more types may be used in combination.) Alternatively, for example, a direct control is performed on the bobbin-shaped wire supply mechanism itself which also serves as a wire storage member. The form in which power is applied may be changed as appropriate, and the point is that any material that can variably apply a desired tension to the wire as a result is sufficient.

Further, in the illustrated example, the veneer veneer is guided around the winding shaft exclusively by a wire. However, if necessary, other guide members such as guide rollers and guide belts may be provided as auxiliary members. Next, the veneer veneer may be guided around the winding shaft by the guide member in a secondary manner. The present invention is not limited to the guiding mode.

[0037]

As apparent from the above, according to the method for winding veneer veneer according to the present invention, it becomes difficult to tune the speed and to regulate the winding position in the initial stage of winding. In order to avoid such problems, the tension of the wire rod may be set to a relatively small value as before, and when the diameter of the wound ball is increased, the tension of the wire rod is gradually increased, and the tension is increased in the centering direction of the wound ball. To prevent the tightening force of the veneer veneer from being excessively reduced, so that the displacement of the veneer veneer can be suppressed even when resuming the temporarily stopped winding in the middle of processing or winding a relatively thick (heavy) veneer veneer. This makes it possible to suppress the deterioration of the posture of the wound ball due to the displacement of the veneer veneer, and to perform the winding process more stably than before.

[Brief description of the drawings]

FIG. 1 is a schematic side view, partially broken away, of a winding device used for carrying out the present invention.

FIG. 2 is a side view operation explanatory diagram of the winding device illustrated in FIG. 1;

FIG. 3 is a side operation explanatory view of the winding device illustrated in FIG. 1;

FIG. 4 is a side operation explanatory view of the winding device illustrated in FIG. 1;

FIG. 5 is a side view operation explanatory view of the winding device illustrated in FIG. 1;

FIG. 6 is an explanatory diagram of an example line showing an example of a control mode of the tension of a wire.

[Explanation of symbols]

 1: Conveyor 2: Touch roll 3: Winding shaft 4: Wire supply mechanism 4a: Supply nozzle 5: Wire rod cutting member 7: Wire rod supply amount control mechanism 8: Wire rod tension controller 9: Wire rod 10: Veneer veneer 11: Advancing and retracting device of wire rod supply mechanism 13: Lifting device of wire rod supply mechanism

Claims (1)

[Claims] 1. A winding method for sequentially winding veneer veneers around a winding shaft, positioning a wire on an outer peripheral side of the veneer veneer, and winding the veneer veneer together with the wire.
A veneer veneer winding method characterized by gradually increasing the tension of a wire rod in response to an increase in the diameter of a winding ball accompanying winding of a veneer veneer.