JPS5928444B2 - Log outer circumference driven veneer lace - Google Patents

Description

[Detailed description of the invention] The present invention relates to improvements in veneer lace.

Conventional veneer laces are unsuitable for cutting soft logs in the center or logs with cracks or rot, and the chuck may spin idle, making power supply impossible, or the log may break, making cutting impossible. It had the following drawbacks.

In addition, when cutting logs with cracks or rot, debris clogging often occurs, reducing the operating rate of the equipment and product quality, and causing abnormal loads due to debris clogging, which can destroy the logs. It had drawbacks.

The present invention aims to solve the above-mentioned conventional drawbacks, and further aims to provide a veneer race driven around the circumference of logs, which enables smooth cutting of logs of a wide range of qualities, including low-quality logs such as materials unsuitable for plywood. The details are as follows.

The veneer lace of the present invention is shown in FIGS. 1, 2 and 7, for example.
As exemplified in the figure, a log driving piercing body roll has a drive member having a large number of piercing bodies 7 on the outer periphery, for example, a plurality of ring-shaped driving members 8 are arranged at appropriate intervals in the axial direction. 5 is provided at a position where the piercing body 7 can practically use the outer periphery of the raw wood 1 near the cutting edge of the cutting blade 2 during cutting, and the piercing body roll 5 is provided with a motor such as an electric motor 23, a chain wheel 20, and the like. 21, a drive mechanism consisting of a chain 13, etc., and furthermore, a fixed bar as illustrated in FIG. 1 or a fixed bar as illustrated in FIG. A pressure bar 3 such as a roller bar is disposed, for example, in a form hanging from a pressure bar 6 provided at a position substantially above the piercing body roll 5 toward, for example, the vicinity of the cutting edge of the cutting blade 2, and further For example, as illustrated in FIG. 8, the spindle drive mechanism 27 includes a spindle 26 and a motor such as a variable speed electric motor 28, and is further controlled in relation to the distance between the cutting blade 2 and the spindle 26. The present invention is characterized in that a spindle rotation speed control mechanism including a rotation speed setting device such as a variable resistor 32 is provided in association with the spindle drive mechanism 27.

The driving member 8 has a large number of protrusions 7 on the outer periphery, which extend sharply in a substantially radial direction and can be applied to the outer periphery of the raw wood, as illustrated in FIGS. 1 and 7, for example. In addition, by forming a plurality of knife-like protrusions 7 having cutting edges of appropriate lengths that are approximately parallel to the axis of rotation, the cutting edges of the protrusions 7 are approximately parallel to the fibers of the raw wood. is carried out, and since the practical volume of the piercing body 7 is relatively small, the plywood veneer 11 is
It has the effect of obtaining a high log driving ability with a low practical force because there is little remaining practical damage and less cutting or destruction of raw wood fibers, but it is not limited to this. If the body is set up in a form that is practical, it can be put to practical use with a corresponding value.

The piercing body roll 5 may have an integral structure in which a driving member portion having a large number of piercing bodies 7 and a shaft portion are processed from a single material, or may be disassembled into a suitable structure, for example, a driving member 8 and a shaft 9. It consists of a structure that is processed separately and combined.

For example, as shown in FIG. 3, by adopting a structure in which ring-shaped drive members 8 and spacer rings 25 are alternately and replaceably fitted to the shaft 9, only the drive members 8 that wear out quickly can be replaced. The ring 25 can be easily replaced, and the drive member 8 can be positioned in the axial direction by the ring 25.

Note that the drive member 8 can be locked with a key by using the keyway 24 of the shaft 9.

Next, to explain the position of the piercing body roll 5 in more detail, for example, as illustrated in FIG.
In the case where the piercing body 7 is provided at a position where substantially only the outer periphery of the raw wood 1 can be used, which is above the cutting edge of the cutting knife 2 in the direction of rotation of the raw wood, for example, as illustrated in FIG.
There are cases in which both the outer periphery of the log 1 above the cutting edge in the log rotation direction and the veneer veneer immediately after cutting are provided at practical positions, and basically these two configurations are provided. I can do it.

In particular, in the case of the latter configuration, the tendering effect of the piercing body roll 5 is high, and there is a possibility of producing a veneer veneer 11 with somewhat increased dimensions and less curling. The effectiveness of the drive is high, and even when the diameter of the log differs or the diameter of the log becomes smaller due to cutting, there is little change in the actual depth of the piercing body 7 relative to the log. It has the possibility of being fixed to the cutter 2.

In addition, in the former case, the piercing body roll 5 is placed in a position where the piercing body 7 can cut only the outer periphery of the log above the cutting edge of the cutting knife 2 in the rotational direction of the log, or it can also be used to cut a plywood veneer immediately after cutting. If it is provided in a possible position, the tendering effect on the veneer veneer will be reduced, the change in the length of the pierce roll 5 will be greater in relation to the diameter of the log, and the change in the length of the pierce roll 5 will be greater in relation to the diameter of the log or the progress of cutting. Although this tends to require a mechanism to adjust the positional relationship, it is possible to drive the log effectively, and the practical depth of the log can be increased.

In either configuration, the piercing body roll 5 can be mounted on its bearing by providing a box 19 on, for example, the tool rest 4, and integrally with the cutting blade 2 etc. by a feeding mechanism 30 (see FIG. 8). It can be made into a movable structure, and the structure and operation can be simplified.

Further, the bearings of the piercing body roll 5 can be placed not only at both ends but also in the middle to reduce deflection, and the driving of the piercing body roll 5 can be performed via a chain 13 or a gear. , one or both ends of the shaft, or even from the middle.

Next, the pressure bar 3 of the present invention will be explained. In the case of the present invention, it is also used for compressing the vicinity of the boundary between the raw wood part and the veneer veneer part, for the same purpose as in the case of conventional veneer lace. It is possible to use the fixed bar (nose bar) type shown in FIG. 1, or the roller bar type shown in FIG. , it is also possible to provide it elastically, so that some elastic deformation occurs in the direction of compression of the log.

Furthermore, in order to arrange the bar 3 separately in a plurality of spaces between the drive members 8 of the piercing body roll 5,
For example, it may have a shape with multiple grooves at appropriate intervals,
For example, they are arranged in the form of a suitable number of comb-like bars or a plurality of small pieces bars as illustrated in FIG.

In addition, according to the bar 3 in the embodiment of FIG. 2 or FIG. 7, the log 1 is partially compressed in shape;
If the size of the void or the amount of damage at the compressed end of the log of the bar 3 is below a certain level, there will be very little negative impact on the quality of the veneer veneer.

Rather, in conventional veneer laces, there was a tendency for cutting to be carried out without fully utilizing the nose bar due to the fear of the chuck spinning idle or clogging with debris from the raw wood. However, in the present invention, the bar 3 is It is possible to perform effective cutting,
In fact, the quality of veneer veneers has the potential to be substantially improved.

The bars 3 are preferably arranged in all the spaces between the driving members 8 of the piercing body roll 5 that are effective for the length of the log to be cut, but for example, the bars 3 may be arranged in an appropriately thinned space. Even if it is placed in a structure, it can be used at a value depending on its structure.

By the way, reference numeral 14 in FIGS. 1 and 7 is a single-plate guide member, and a single-plate bending member 17 disposed at a position downstream of the guide member 14 in the rotational direction of the drive member 8 allows the drive member 8 to This is to form a curved discharge path with the front side of the veneer veneer 11 facing outward near the end of the veneer discharge path formed by the guide member 14, which causes cracks to grow in the veneer veneer 11 and causes excessive curling. This is a device for discharging in a state where there is little.

In addition, 15 is a guide surface of the guide member 14 for increasing the veneer conveyance force of the driving member 8, 16 is a flank surface that opens a discharge path, 18 is a guide surface of the bending member, and 10 is a guide surface of the bending member 17. It is a support stand.

Note that the bending member 17 allows the veneer veneer 11 to be smoothly separated from the piercing body 7 of the driving member 8, or
It can also have the function of a peeling member for cleaning the surrounding area, and can also be provided alone as a peeling member.

In addition, 12 in FIGS. 1 and 2 is a knife holder,
22 in Fig. 2 is a sharpening knife.

FIG. 8 illustrates -f1 of the implementation of the spindle drive mechanism in the present invention, in which the variable resistor 32
and a gear 34 that meshes with a gear 33 provided on the shaft.
The rotation axis is the frame of the veneer lace body (not shown)
As the turret 4, which is fixed to the turret and supports the cutting blade 2, moves, the plate cam 35, which is in contact with the arm 36 fixed to the turret 4, rotates, and the gear 34.3 rotates.
The variable resistor 32 is driven through the variable resistor 32.

The variable resistor 32 is controlled in relation to the distance between the cutting blade 2 and the spindle 26 or the position of the cutting blade 2, and is further specified in the embodiment of FIG. The variable resistor 32 is configured to be driven in relation to the movement of the cutting tool 2, and the variable resistor 32 is configured to control the distance L between the cutting tool 2 and the spindle 26, the position of the cutting tool, and ultimately for cutting. It is designed to accurately grasp the maximum diameter of the loaded log or the diameter of the log 1 being cut.

Therefore, the variable resistor 32 transmits an information signal regarding the indirectly grasped log diameter, and the spindle drive mechanism 27
For example, a variable speed mechanism such as a variable speed electric motor 28 is controlled, and the output rotation speed of the spindle 26 is controlled.

That is, the main feature of the embodiment shown in FIG. The number of revolutions of the spindle 26 is controlled based on the control signal generated by the spindle 26, thereby controlling the rotation speed of the spindle 26.
The purpose is to determine the circumferential speed of the log by the spindle 26 and synchronize it with the circumferential speed of the stab roll 5, or to make the circumferential speed of the log by the spindle 26 approximately constant.

The shape of the plate cam 35, the position of the rotation axis of the arm 36 and the gear 34, etc. can be designed according to the type of the variable resistor 32. For example, the variable resistor 32 can be designed to match the cutting blade 2. By setting each element so as to transmit a resistance value that is inversely proportional to the distance between the resistor 32 and the spindle 26, for example, by configuring the variable speed motor 28 to output a rotational speed that is directly proportional to the resistance value indicated by the resistor 32. For example, when the distance is 1/2, the spindle 26 is made to output twice as many rotations as a general rule.

According to the above embodiment, the basic condition of the rotation speed of the spindle 26 is determined regardless of the presence or absence of logs. The initial log circumferential speed is low because it is assumed to be a log of , but it becomes the correct circumferential speed at the time of starting cutting.

Further, in the above embodiment, the resistor 32 is connected to the feed screw 2, for example.
The resistor 32 etc. can be driven under arbitrary conditions by providing it in relation to the appropriate position of the drive mechanism 30 of 9, or by applying various cams, or by applying various resistors or other position detectors, etc. Design changes are possible.

In addition, 37 to 40 in FIG. 8 are examples of the variable resistor 31 etc. which are controlled in direct relation to the diameter of the log 1, 38 is a gear provided on the resistor 37, and 39 is a gear. A gear meshed with the gear 38, 40 is the gear 39
This is an arm fixed to.

Furthermore, in FIG. 6, the piercing body roll 5 is rotated at a constant speed, and the rotation speed of the spindle 26 is inversely proportional to the distance between the cutting edge of the cutting blade 2 and the axis of the spindle 26.
The diameter of the log or the distance when the log is driven at a substantially constant circumferential speed by the spindle drive mechanism 27 which outputs the output from the spindle drive mechanism 27 so as to cut at a constant speed, and the piercing body roll 5 and the log. This is a graph illustrating the relationship between the rotation speed N of the raw wood by the spindle 26, and constant speed cutting allows for easy direct connection with the subsequent process, and furthermore, in the case of the graph in FIG. Compared to the number of rotations of raw wood caused by the piercing roll 5, the number of rotations of raw wood caused by the spindle 26 shown by the curve 42 is somewhat higher over the entire range.

The peripheral speed of the piercing body roll 5 and the peripheral speed of the log by the spindle 26 are synchronized so that they are almost the same, or so that the latter is somewhat higher than the former, Alternatively, there are cases where both are tuned so that the former is somewhat higher than the latter, and one of them is set somewhat higher and the higher drive mechanism is made to slip at a constant torque. As a result, the accuracy can be suitably lowered, making it easier to synchronize. For example, as shown in FIG. For example, as illustrated in FIG.
If provided, cutting can be performed with the circumferential speed of the stab roll 5 taking the lead, and the start of power supply by the roll 5 can be made smoother.

It is a feed screw for moving the 29th tool post 4 etc. in FIG. 8, and 30 is a drive mechanism for the feed screw 29 including a gear box 31 etc.

As described above, the present invention provides a piercing body roll in which a plurality of driving members having a large number of piercing bodies on the outer periphery are arranged at appropriate intervals in the axial direction, and the piercing bodies are arranged at the tip of a cutting blade. The outer periphery of the raw wood is provided at a practical position, and pressure bars such as fixed bars or roller bars are arranged in a plurality of spaces between the drive members of the piercing body roll to prevent blockages between the piercing body roll and the pressure bar. By providing these in such a way that they interfere with each other, when a pressure bar such as a fixed bar is used, an appropriate proportion or all of the power required for cutting, etc. is applied to the cutting by the piercing body roll. A spindle rotation speed control mechanism that enables feeding to the outer periphery of the raw wood near the cutting edge of the cutting blade and includes a rotation speed setting device such as a variable resistor that is controlled in relation to the distance between the cutting blade and the spindle. is provided in conjunction with a spindle drive mechanism, thereby making it possible to effectively synchronize the circumferential speed of the piercing body roll and the circumferential speed of the log by the spindle, or to make it possible to substantially constant the circumferential speed of the log by the spindle. and
By supplying power to the outer periphery of the log near the cutting edge of the cutting tool using the piercing body roll, it is possible to reduce the destruction of the log, and the piercing body roll can forcibly remove log fragments between the log and the bar with a small amount of power. It has the effect of pushing in or feeding out the cutting edge, and can therefore reduce problems caused by debris clogging at the cutting edge.Furthermore, it can also be used, for example, in the case of raw wood with an irregular outer circumference or irregular diameter. The start of power supply or the start of cutting by the stab roll can be made smoother, or the veneer veneer can be discharged at a substantially constant speed by cutting to a fixed length.

As described above, the present invention can provide great value in terms of labor saving in the plywood manufacturing process, effective use of raw wood yield resources, etc., and is a fundamental reform of conventional veneer lace. .

[Brief explanation of the drawing]

The drawings illustrate an example and mode of implementation of the present invention, and FIGS. 1 and 5 are side views (sectional views), and FIGS.
The figure is a front view, FIG. 3 is an exploded view, FIGS. 4 and 8 are explanatory views of the drive mechanism, FIG. 6 is a graph, and FIG. 7 is a partially enlarged view. 1... Log, 2... Cutting knife, 3.
... Pressure bar, 5 ... Pierce body roll, 7 ... Pierce body 8 ... Drive member,
9...Shaft, 11...Single plywood, 26...Spindle, 27...Spindle drive mechanism, 32...Variable resistor .

Claims (1)

[Claims] 1. A piercing body roll in which a plurality of driving members having a large number of piercing bodies on the outer periphery are arranged at appropriate intervals in the axial direction,
The piercing body is provided with the outer periphery of the raw wood near the cutting edge of the cutting blade at a practical position, and is provided with a drive mechanism for the piercing body roll, and is further provided with a plurality of spaces as appropriate between each driving member of the piercing body roll, A pressure bar such as a fixed bar or a roller bar is arranged, and the machine further includes a spindle and a spindle drive mechanism, and includes a rotation speed setting device such as a variable resistor that is controlled in relation to the distance between the cutting blade and the spindle. A veneer lace comprising a spindle rotation speed control mechanism associated with the spindle drive mechanism. 2. The veneer lace according to claim 1, wherein the piercing body roll has a structure in which drive members and spacer rings are alternately and replaceably fitted to the shaft. 3. The stabbing body roll has a stabbing body on its outer periphery at a position where substantially only the outer periphery of the log is located above the cutting edge of the cutting blade in the direction of rotation of the log. Veneer lace as described in section. 4. The piercing body roll has a piercing body on its outer periphery that is provided with both the outer periphery of the raw wood, which is above the cutting edge of the cutting blade in the direction of log rotation, and the veneer veneer immediately after cutting, both at practical positions. Veneer lace according to scope 1 or 2. 5. Claim 1, wherein the pressure bar is arranged with a plurality of small piece bars or an appropriate number of comb-like bars.
Any one of Items 1 to 4 A. The veneer lace described above. 6. The veneer lace according to any one of claims 1 to 5, comprising a spindle rotation speed control mechanism including a rotation speed setting device that is driven in relation to the movement of the cutting blade. 7. The veneer lace according to any one of claims 1 to 6, wherein both are synchronized so that the circumferential speed of the log by the spindle is somewhat higher than the circumferential speed of the piercing body roll. 8. The veneer lace according to any one of claims 1 to 6, wherein both are synchronized so that the circumferential speed of the piercing body roll is somewhat higher than the circumferential speed of the log by the spindle. 9 Consisting of a spindle drive mechanism that causes the spindle to output a rotational speed that is inversely proportional to the distance t between the cutting edge of the cutting blade and the spindle axis, thereby driving the log at a substantially constant circumferential speed. Claim 1
The veneer lace according to any one of items 8 to 9.