JPS5933103A - Grasper for material wood in veneer lathe - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a veneer lace that cuts a wide thin sheet-like veneer veneer using a cutting blade that spans the entire length of the log while rotating the left and right end faces of the log using a spin tractor. This invention relates to a log gripping device that is attached to the vicinity of the tip of a spindle mounted on a veneer race, and grips the end face of the log, which is the raw material to be cut, from the left and right sides.

In veneer lace, which involves turning thin sheet I-shaped veneer veneers, the raw wood supplied varies in size and size, but in recent years, low-grade raw wood has been widely used in order to reduce the cost of plywood products. It has come to be.

These various types of raw wood, ranging from large diameters to small diameters, generally have several types of raw wood length in the longitudinal direction (thin sheets that are connected in a band shape and correspond to the width dimension of the veneer cut from veneer lace). It is customary that cutting is performed by one veneer race from a large diameter to a small diameter, for example, by dividing it into 8-shaku or 5-shaku veneer races.

In other words, in order to grasp the left and right end surfaces of large-diameter logs and transfer rotational force to the logs in response to cutting resistance, a spindle of a corresponding thickness (the one that directly touches the logs is attached to the tip of the spindle) The diameter of the log gradually decreases as the cutting of veneer from the log progresses, and the diameter of the log gradually decreases to a finer diameter. By single-cutting the spindles that grip the left and right end faces of the main mouth, the cutting of one log is completed, and the small-diameter logs (generally called peeled cores) that are gripped by the spindle diameter are cut to the very limit of the spindle diameter. ) is removed from the spindle and prepared for the next new log gripping.

Therefore, in order to increase the yield of veneer from one log, the thinner the peeled core is, the better it is, and a small diameter spindle is preferable.
Some logs are as thick as . ) There is a paradoxical relationship between the two: there is a limit to the ability to stably rotate the spindle with a small diameter spindle, and the larger the diameter of the spindle, the more reliably the rotation can be driven.

In order to overcome these bottlenecks, for example, USP No. 376735
A so-called double-spindle veneer lace of parent-child type was developed as illustrated in the issue.

That is, a large spindle with a large diameter is provided by appropriately perforating the inner diameter of the spindle to form a hollow shaft, and a small spindle having a diameter one step smaller than that of the large spindle is inserted through the hollow shaft to make sliding contact with the large spindle. In this double spindle system (the conventional spindle is called a single spindle as opposed to the parent-child type double spindle mentioned above), when cutting raw wood, both a large spindle with a large diameter and a small spindle with a small diameter are used at the beginning of log cutting. The log is rotated depending on the gripping force of the left and right end surfaces of the log of the large-diameter spindle, and as the cutting progresses, the log becomes smaller in diameter, and the large spindle is separated from the log before the diameter of the large spindle. The logs are rotated and cut using a small spindle inserted through the inner pocket of the machine. Naturally, the small spindle, which is much thinner than the large spindle, made it possible to cut veneer to the very edge of its diameter, resulting in an extremely thin core diameter and improved yield. Through the above, the problem was solved to a certain extent, but if we consider the double spindle type veneer lace again, it is an extremely large-scale device, and furthermore,
As discussed in Publication No. 7, the moisture contained in the raw wood flows into the sliding surface between the large and small spindles through the outer peripheral surface of the small spindle, resulting in harmful effects such as early corrosion of the spindle. Countermeasures have also become essential. Furthermore, the complicated double spindle had disadvantages such as requiring long hours of maintenance and inspection by a limited number of experts.

Here, the present invention provides a log gripping device that has the same effect as the double spindle using an extremely clean device, eliminates the troubles peculiar to the double spindle because it is a simple device, and is easy to maintain. It is.

In order to solve the above problems, the present invention provides a conventional single spindle and a large chuck corresponding to a so-called large spindle that slides back and forth by fitting into a small chuck attached to the tip of the spindle, and the large chuck If necessary, the large chuck may be arranged at the same position as the small chuck in the axial direction, or may be set back from the small chuck (in the direction away from the end face of the raw wood). It is characterized by the provision of a forward and backward movement device.

Examples will be described below based on the drawings. FIG. 1 is a partial plan view of a veneer lace including the device of the present invention, showing a state in which the head camp of the veneer lace frame has been removed, and the schematic lower part of the frame and the subsequent parts are omitted. FIG. 2 is a front view showing a cross section of the veneer lace, and like FIG. 1, a part of the frame is omitted. FIG. 3 is a partial detailed view of the large chuck advancing/retracting device. In FIGS. 1 and 2, the VL is made of veneer lace, and a box-shaped frame 1o is placed at the left and right ends of the 2, which are usually unfinished (not shown), and the bed is placed on the foundation 2 with anchor bolts.

Each of the left and right frames has a Howe nailing 12 in the left and right direction.
A dust seal is fitted on the west side of the housing, and a hollow hollow shaft 22 is supported via a bearing 14. Bearing 14 is another dust sole 13
The bearing cap 15 or the mounting flange 51 is fitted into a predetermined position within the housing 12. Approximately in the middle of the enamel shaft 22, which is connected to the frame 10 via a bearing 14, there is a chain wheel 28 or a key 27 that rotates the enamel shaft in the direction of arrow A.
It is fixed through.

A head cap 11 covers the chain wheel 28 slightly protruding from one end of the frame 10. On the other hand, bushings 23 of a predetermined length are fitted into the inner diameter of the front and rear end edges of the hollow part of the hollow shaft 22, respectively, and the spindle 20 fitted into the inner diameter of the bushings is connected via one or more spindle keys 24. The enamel shaft is held through the enamel shaft. Further, one or more key grooves 21 are bored in the outer circumferential surface of the spindle 20 to a predetermined length parallel to the axis. Note that the spindle key 24 is installed between the enamel shaft 22 and the spindle 20; There is also an installation method in which holes are provided between the hollow shaft 22 and the chain wheel 28, and the chain wheel key 27 is omitted.

On the outside of the frame 10, a flange 51 or a plurality of bolts are used to attach the bearing 14 in a predetermined position. A fluid passage 51H communicating from the surface to the fluid cylinder 52 side is bored. Reference numeral 52 denotes a cylinder, and the recess fits into the stepped portion of the flange 5, and is fixedly installed by a plurality of stud bolts 53 via a cylinder head (not shown). Although only a part of the fluid cylinder device 50 is shown, the spindle 20 is just likened to a piston rod, and the cylinder 52 has a built-in bearing at its negative end (the right end in FIG. 2). A piston (not shown) that is in close contact with the inner diameter wall surface is locked, and the pressure fluid flows into the cylinder.The spindle 2° can be moved forward and backward in the directions of arrows C and D, and rotated in the direction of arrow A. It is configured so that it is possible. Therefore, a relative sliding movement in the direction of arrow C1 or D is performed between the outer peripheral surface of the spindle 20 and the bushing 23 of the enamel shaft, and when rotating in the direction of arrow A, the enamel shaft 22 holds the bushing. The bush 23 and spindle 20 rotate together.

20, C is a small chuck, and its tip has a plurality of claws 20T that bite into the end face of the raw wood, and is configured to have approximately the same diameter as the outer diameter of the spindle 20, and has a spindle tip (fluid cylinder device W). (opposite side of 50). As shown in FIG. 2, the fixing means is screwed with a screw that can be tightened against rotation in the direction of arrow A, or fitted with a taper.

30C is a large chuck which forms the main part of the present invention, and like the small chuck, a claw part 30T for biting into the log is planted on the side end surface. The inner diameter of the large chuck is slightly larger than the outer diameter of the spindle 20, and is indicated by the arrow C1 along the outer peripheral surface of the spindle.
Alternatively, it is sufficient if it can be slid in the D direction. Furthermore, spindle 2
The cross-sectional shape of the sliding range of the large chuck 30C of 0 is shaped into a width across flats, a square, a hexagon, etc.,
The inner diameter of a large chuck that is loosely inserted into the core may be bored in the same shape.

As shown in the figure, the outer peripheral surface of the large chuck is provided with a stepped portion, and a thrust bearing 33 is fitted in the core portion, and a chuck porter 32 is attached to the outer peripheral surface of the large chuck.

Further, the inner circumferential surface of the chuck holder 32 and the outer circumferential surface of the large chuck are configured to be reversible in the direction of arrow A via the bush 31 and the thrust hair ring 33. In order to prevent the chuck holder attached to the large chuck from separating from the large chuck due to movement in the direction of the arrow as described later, a stopper 35 or a bolt is attached to the large chuck holder.
It is fixed to the end face of the large chuck and is held between the thrust bearing 33 and the stopper 35 arranged at the stepped portion of the large chuck, and moves integrally with the large chuck in the direction of arrow c1 or direction D. In addition, at the end of the chuck holder 32 opposite to the one in contact with the thrust bearing 33, a hole is formed under a connecting portion 36 or 1, which is connected to a shift lever 41 (described later). To explain the advancing and retracting device 40 of the large chuck 30C individually, in FIG. 2, the frame 10 with the head cap 11 removed allows a glimpse of the built-in chain wheel 28 and the hollow shaft 22. frame 1
A bunker bracket 45 is attached to the front surface 10F of the spindle 20 at approximately the same height as the horizontal center line of the spindle 20.

Further, as shown in FIG. 3, a support bracket 46 is fixed to the tip of the hanger bracket protruding from the frame, and two of the fluid cylinders 47 are connected by support pins 46'.
It is connected to a clevis-shaped cylinder head, and the cylinder is supported so as to be able to swing from side to side using the support pin as a fulcrum.

A bifurcated fork lever 48 is screwed and connected to the piston rod 47R of the fluid cylinder 47.

On the other hand, as shown in FIGS. 1 and 2, fulcrum brackets 43 are installed on the bearing cap 15 inside the frame 10 at vertically symmetrical positions, sandwiching the spindle 20 and the hollow shaft 22.

Next, at the tip of the fork lever 48 connected to the piston rod 47R of the fluid cylinder, there are two pairs of shift levers 41, each having the same distance between centers, and a connecting pin 44, which holds the spindle 20 between the levers 42 and 42. It is swingably attached to the holder. Furthermore, the other end of the shift lever 41 that is engaged on the outside of the fork lever 48 is connected to the connecting portion 36 of the chuck holder 32 and the biscuit 44, and the shift lever 41 that is engaged on the outside of the shift lever 41 The other end is connected to the aforementioned fulcrum bracket 43 via a pin 44. Each of the above brackets 43.45.46
, levers, pins 41, 42, 48, and fluid cylinder 47 (not shown), the pressure fluid unit constitutes an advancing/retracting device for the large chuck 30C. Although not shown in the drawings, not only the spindle 20 but also the large chuck 30C and the advance/retreat device 4o are provided in association with the left and right frames of the veneer race. In addition, as a simple device, a large chuck 30C and a retractable bag holder 40 are used.
There is also a method where it is installed only on the operator side of the veneer lace, and the large diameter base of the log or the fragile end face of either the left or right end of the log is placed on the operator side and loaded into the veneer lace. In addition to the embodiment in which the hanger bracket 45 is attached to the front surface of the frame, it is also possible to install it in other ways, for example, by protruding from the bed.

There is a position detection device (not shown) for a knife that cuts a veneer from a log. This device detects the diameter of the log being cut, and is installed by engaging with, for example, the drive shaft of a forward feed mechanism of a gun turret (not shown) that is equipped with the cutter and moves forward and backward toward the log. In short, the current position during forward and backward movement (during cutting, corresponds to the diameter of the log currently being cut. Any device that outputs an output may be used. Furthermore, it may output a signal at a predetermined position set in advance.

Note that the detection device may be omitted and the operation may be performed manually by visual inspection by the operator.

Embodiments of the present invention will be described based on the above configuration.

The large chuck 30C is first lowered immediately after the log cutting is completed, and when the log cutting is completed, it retreats away from the log and waits at the position shown by the solid line in FIG. 1.

That is, the fluid cylinder 47 of the advancing/retracting device 40 pulls back the piston rod 47R in the direction of arrow F toward the cylinder side, and connects it to the tip of the ridge rod. 2) The spindle 26 is operated by a fluid cylinder device 50 connected to the rear of the frame. . That is, the raw wood cutting path T is the start point of the cylinder, as shown in FIG.
It starts with the inflow of pressure fluid, and the inflow of the pressure fluid causes the first stroke (not shown) in the cylinder 52 to move in the extending direction (to the right of the 21st cylinder). The piston is connected to a spindle 20, and the spindle detaches from the end face of the log with the clamp 1 and retreats toward the frame (the younger side in FIG. 2). In this case, the 4-round core log that has been cut to the limit of the outside diameter of the spindle that was being held in the grip loses its engagement with the small chuck 20C at the tip of the spindle and naturally falls downward, and is carried by a conveyor etc. to the veneer lace machine. The logs are transported outside and prepared for the next round of logs. On the other hand, the hauling bin 2o, which is retracted on the Frenim side, stops at a predetermined position that will not interfere with the delivery of the next log and prepares for the next operation. Next, the new log is carried to the veneer race side using a hoist, etc., and the shaft center of the log is aligned, and the spindle 20 is moved forward from the fluid cylinder device 50 toward the log side in the direction of arrow C, and the left and right spindles (directly A small chuck 20C attached to the tip of the spindle 20 is placed in close contact with the top end of the log to securely clamp the log from the left and right sides. Subsequently, the advancing/retracting device 40 of the large chuck 30C, which was on standby, is activated. That is, the piston of the cylinder 47 of the advancing/retracting device 40 (not shown)
When the piston rod 47R is operated in the direction of arrow E, the piston rod 47R advances from the cylinder, connects to the forklift lever 48, and connects one side of it to the fulcrum bracket 43 or the chuck holder.
The shift trays 41 and 42 connected to the connecting portion 36 move from the V-shaped device shown by the solid line in FIG. 1 to the linear position shown by the phantom line in FIG. 32 approaches the log side in the direction of arrow C while rubbing the outer peripheral surface of the spindle 2o via the bushing 31 as it moves, and finally touches the claw portion 3 of the large chuck 30C.
0-cho is the one that Hara Mikiguchi is going to bite into. It should be noted that there is a method in which the large erasure pressure machining chuck 30C of the advancing/retracting device 40 grips the raw wood, and also a method of applying pressure while maintaining the running pressure even during the cutting of the raw wood, and a method of applying pressure by maintaining the running pressure even during cutting of the raw wood, and a method to apply pressure to the large chuck 30C of the raw wood hollow end surface. After cutting 30T, it is best to block the pressure fluid and use it to correspond to the rod shape of the log as appropriate. In addition, it is preferable to introduce a pressure fluid into the cylinder at any time, such as when the cutting amount of the raw wood is such that the gripping of the heel part becomes loose.

Furthermore, the timing of the introduction of large chuck 30C is spindle 2.
This may be done in conjunction with the approach to the log 0, or it may be done manually as necessary after visually confirming the shape of the log.

With the above steps, a new log is brought in and securely gripped by the spindle and large chuck, and then the log is rotated and a cutter is driven into its outer circumferential surface by a predetermined amount to cut and produce a veneer. As the cutting progresses, the diameter of the log gradually decreases, and when the diameter of the log eventually reaches around the outer diameter of the large chuck 30C, a signal from a preset blade position detection device or manual operation is activated to move the large chuck forward and backward. is activated. That is, fluid in the direction of arrow F is introduced into the fluid cylinder 47, the shift levers 41 and 42 are pulled back into the V-shape shown by the solid line in FIG. It stops and waits in the direction shown, that is, at a position away from the butt end surface of the log so that it does not interfere with the subsequent approach of the cutting blade to the log. During this time, the cutting of the log continued without interruption, and the cutting of one log was completed by cutting to the vicinity of the outer diameter of the spindle 20, and the spindle moved back and separated from the log (which had a stripped core). The peeled core will fall naturally, and the above operation will be repeated in preparation for bringing in the next log.

The rotation of the raw wood is transferred from the main motor to the chain wheel 28, which transmits rotational force, to the key 27, to the enamel shaft 22, and then to the spindle 20 via the key 24.
rotates, and the log is rotated by the small chunk 20C attached to the tip of the spindle. Furthermore, spindle 20
According to the combination, the sliding movement range of the large chuck 30C is configured to have a cross-sectional shape such as width across flats, square, or hexagon, and the large chuck 30C is perforated in the same shape to slide into and loosen the core part. By enjoying the rotation from the spindle 20, it is possible to transfer rotational force to the log from the large chuck as well.

Note that the amount of movement of the large chuck by the advance/retraction device 40 varies depending on the length of the raw wood that is the raw material to be cut, and the amount of movement of the spindle 20 in the arrow 1 or D direction is configured to have a stroke with sufficient margin accordingly. Therefore, the movement amount of the large chuck 30C is configured to have a margin commensurate with the spindle. Further, although FIGS. 1 to 3 illustrate an embodiment in which a link mechanism is used in combination of a fluid cylinder, a fork lever, a shift lever, etc., other examples may be used, such as a combination of a spring and a link mechanism, or It is also possible to attach and detach the attachment to and from logs by manual operation using springs, cams, and the like.

Furthermore, regarding the timing of detachment of the large chuck, the large chuck should be withdrawn relatively early by anticipating the amount of cutting movement of the cutter into the raw wood, such as when it is automatically executed by a signal from the blade position detection device during rotary cutting of raw wood. However, if it is determined that the material near the center of the log is weak and it is impossible to continue cutting with the small chuck 20C attached to the spindle, for example, the removal of the large chuck is canceled and the large chuck is cut to the very limit of the diameter. There is also a method of cutting the small chuck, abandoning further cutting, separating the small chuck from the large chuck, and removing it from the veneer lace as a bare core log with a diameter that is just the diameter of the large chuck. It goes without saying that the diameter of the large chuck should be made large or small depending on the condition of the raw wood.

In addition, as a special application, the large chuck 30C is loosely fitted onto the outer circumferential surface of the large spindle of the parent-child type double spindle using a conventional double spindle type hennya race*, so that it can be moved forward and backward. A method that corresponds to cutting also has a practical effect.

With the wooden equipment mentioned above, it is possible to achieve the same effect as the conventional large-scale double spindle type veneer lace with an extremely simple equipment, and it is easy to improve the yield and efficiently obtain veneers from low-grade logs. Equipment costs are low, running costs can be reduced, and maintenance has become easier.

[Brief explanation of the drawing]

FIG. 1 is a partial plan view of an embodiment of the present invention, FIG. 2 is a partial front view in section, and FIG. 3 is a partial detailed view of the advancement/retraction device. VL......Veneer lace L...Log 10...Frame 11...Head cap 12... ...Housing 14...Bear link 15...Hair ring cap 20...
...Spindle 20G...Small chuck 21...Keyway 22...Polow shaft 28...Chain wheel 300...・・・
...Large chuck 32 ... Jack holder 33 ... Thrust bear link 35 ...
... Stopper 40 ... Advancement/retraction device 41.42 ... Shift lever 3 44 ... Pin 50 ... Fluid cylinder device 51 ...
...Flange 51H for installation...Fluid passage 52...Cylinder 53...Statholt and above Patent applicant Uroko Seisakusho Co., Ltd.

Claims (1)

[Scope of Claims] 1. A veneer race that grips raw wood and cuts a veneer while rotating, comprising a spindle that grips raw wood, and a large chuck that slides while being attached to the outer peripheral surface of the spindle;
A device for holding logs in a veneer race, characterized by comprising a forward and backward movement device that slides the chuck in the axial direction of a spindle. 2. The lumber gripping device for a veneer lace according to claim 1, wherein the dog chuck advancing and retracting device is constituted by a fluid cylinder and a linkage mechanism such as a fork lever and a shift lever. 3. The lumber gripping device for veneer lace according to claim 1, wherein the large chuck advancing and retracting device is constituted by a combination of a bow pull and a link mechanism. 4. Claims 1 to 3, characterized in that the outer peripheral surface of the large chuck sliding range of the spindle and the inner surface of the large chuck into which the spindle I is loosely fitted have a circular cross section. A device for grasping logs in a veneer lace according to any one of the above. 5. A patent claim characterized in that the outer circumferential surface of the sliding range of the large chuck of the spindle and the inner surface of the large chuck that loosely fits into the east spindle have a cross-sectional shape of a width across flats or a polygonal shape such as a square chisel. A grasping device for raw wood in a veneer lace according to any one of items 1 to 3. 7. In the veneer race that cuts the veneer while holding and rotating the log, it is equipped with a spindle that holds the log,
A large chuck that is attached to and slides on the outer peripheral surface of the spindle, an advance/retreat device that moves the chevron in the direction of the axial force of the spindle, and a blade position detection device that detects the diameter of the log being cut. A hemorrhoid clamping device made of raw wood in veneer lace. 8. The device for grasping logs in a veneer race according to claim 7, wherein the advancing and retracting device for the large chuck is constituted by a fluid cylinder and a link mechanism such as a footer lever and a shift lever. 9. The lumber gripping device in a veneer race according to claim 7, wherein the forward and backward Q position of the large chuck is constructed by a combination of a spring and a link mechanism. 10. The outer peripheral surface of the large chuck sliding range of the spindle and the inner surface of the large chuck loosely fitted onto the spindle have a circular cross section. Grasping device for logs that are blind to the base race described in any one of the paragraphs - 011 Large chain 7 spindle -
Claims 7 to 9 are characterized in that the outer circumferential surface of the moving range and the inner surface of the large chuck that loosely fits onto the spindle have a cross-section having a width across flats or a polygonal shape such as a rectangular shape. A device for grasping logs in a veneer lace according to any one of the above.