JPH026602B2 - - Google Patents

Description

Detailed Description of the Invention The present invention is a veneer patch repair in which local defects such as loose knots, dead knots, holes, and combs are cut out in the veneer and a healthy repair material is inserted into the same area. Regarding the method.

Conventionally, this type of technology has been described on pages 127 to 131 of the book "Manufacturing of Plywood" (author: Haruo Watanabe, Morikita Publishing, 7th edition).
The following also exist:

First, the defect is removed by punching or cutting out the defective part at an appropriate location, and then a previously prepared plug (fitting plate) of the same type is manually fitted into the removed part at another location. be.

The other method is the so-called Lyman method, in which the work of removing the defects of the above-mentioned construction method and the work of fitting the plug are carried out in the same predetermined place by a series of mechanical operations, which is considerably labor-saving and automated compared to the above-mentioned construction method. ing.

However, in these methods, the punching of defective parts and the punching for making plugs are performed using essentially separate punches (cutting members), so it is necessary to provide high precision uniformity between the punches. Each of these methods has drawbacks that require extremely high skill in precision control of the punch, centering of the mounting position, etc., and it is extremely difficult to maintain a desirable fit when the plug is fitted. In terms of work efficiency, it is also possible to use the usual manual method, in which the plug is inserted after removing the punching waste after punching out the defective part, or by simply replacing that method with mechanical operation. In order to improve efficiency, in addition, the patch repair location is fixed, and it is necessary to manually move the veneer to be repaired and bring the defective part to be repaired directly under the punch. Workability was severely limited, and efficiency was still low. In other words, it remained at the level of so-called point patch repair technology in which the location where patch repair could be performed was fixed at one point.

The present invention is not limited to such a point-type technique, but is capable of moving on a predetermined line and performing patch repair at any point on the line, or linear technique that can move on a plane or curved surface and patching at any point on the line. It can be applied to extremely efficient patch repair techniques such as the surface method that allows patch repair at one point, and the desirable match between the shape of the defect cutout of the veneer to be repaired and the shape of the plug is extremely uniform. This paper aims to contribute to the plywood manufacturing industry using poor-quality logs by improving quality, yield, and productivity by providing a basic patch repair method that can be guaranteed.

Hereinafter, an example of an apparatus for carrying out the method of the present invention will be described in detail with reference to the drawings.

First, the first invention (hereinafter referred to as
(simply referred to as the first invention).
The following description will be made based on the cross-sectional views of the device examples illustrated in FIGS.

In the figure, 1 is a veneer having a defective part 3, and 2 is a repair material from which a plug 2a is made.
Normally, a sound veneer of the same thickness is used as the repair material 2, but other materials such as cardboard, plastic, or fiberboard such as board may also be used instead.

On the other hand, the device for patch repair using the veneer 1 and the repair material 2 is a ring-shaped knife having a cutting edge line such as the shape illustrated in Figure 8.27 on page 131 of the aforementioned book, for example, as shown in Figure 21. A kimono, called a ring-shaped cutter, and approximately along the ring-shaped cutter 4, provided continuously or intermittently on the inside and outside thereof, for example,
The so-called patcher head consists of rubber pressing members 6 and 5 and a head plate 7 serving as a holding member for them, and as shown in the plan view in FIG. The annular cutter 4 is composed of two parts: a blade holder 8 for receiving the blade, and a table 9 surrounding the blade holder 8.

Then, the first invention method, which is applied to point-type, line-type and surface-type patch repair techniques, is carried out by using the example apparatus and operating as shown in FIGS. 1 to 4. That is, as illustrated in FIG.
Then, as shown in FIG. A cutout part 1a on the inside of the annular cutter 4 and the plug 2a are made to be misaligned, and the plug 2a and the veneer 1 on the outside of the annular cutter 4 are made substantially planar. Then, as shown in FIGS. 3 and 4, the annular cutter 4 is removed while maintaining the above state by the inner and outer pressing members 6 and 5, and the defective part 3 is removed and the plug is applied to the same part. Insert 2a. That is, the repair material 2 and the veneer 1 are placed between the patcher head and the blade receiver.
The parts are brought in and the patch repair is carried out by the relative movement of the two parts as described above.

Now, in this example, a linear or surface patch repair technique is used, but as is clear from FIGS. 1 to 4 and FIG. Since the relationship between the two parts and the blade receiving part does not require particular precision, if both parts are configured to be movable along an arbitrary line or surface by appropriate means, a linear system can be achieved. Regardless of whether it is a surface type or surface type, patch repair as described above can be carried out at the desired location.

Next, other aspects of the first embodiment will be further explained using an example of a device obtained by adding some changes to the device described above.

First, the blade holder is constituted by an elongated blade holder 20 and tables 21 provided on both sides thereof, as shown in a plan view in FIG. still,
In the figure, 19 indicates a cutting edge line of the annular cutter 4, and 22 indicates a pressing portion by an outer pressing member. On the other hand, as illustrated in FIG. 15, the patcher head is constructed by adding a steel plate 17 and a thin rubber 18 to the outer pressing member 5 to the apparatus illustrated in FIGS. 1 to 4. Incidentally, the shape of the head plate 16 is also slightly changed as shown in the figure. That is, in response to the above-mentioned change in the blade receiving part, the patcher head part is also made the above-mentioned change, and the reason for this is as follows.

That is, these two parts operate as shown in FIGS. 1 to 4 to repair the patch, but as shown in FIG. If there is a step,
If only the outer pressing member 5 is made of rubber, the first
As shown in Fig. 4, since the blade holder 20 has an elongated shape, the outer pressing member 5 in the part where the table 21 is not directly below pushes down even the outer veneer 1 and the repair material 2 of the annular cutter 4. This is because a predetermined deviation, that is, a deviation that makes the inner plug 2a of the annular cutter 4 and the outer veneer 1 substantially planar cannot occur. Therefore, as shown in FIG. 15, a steel plate 17 is attached by adhesive or the like to a flexible rubber having a so-called sectional pressing function, so that the outer pressing function can be integrally displaced. Even in a part where there is no table 21, it is integrated with the part where it is and is displaced, so that the veneer 1 and the repair material 2 on the outside of the annular cutter 4 are not pushed down, and a predetermined misalignment is formed without any problem. We have improved it as much as possible. Further, the thin rubber 18 increases the frictional force and prevents damage to the repair material 2 or the veneer 1 during overlapping cutting by the annular knife 4.

In this way, along with the change in the blade receiving part, the patcher head part can also be rationally modified, resulting in a preferred wire-type device, which is implemented as follows. That is, by appropriately moving the patcher head made up of the respective members provided on the head plate 16 in the direction in which the blade receiver 20 extends, and applying the action as illustrated in FIGS. 1 to 4 at a desired location, We perform patch repairs. Of course, if both parts are made integrally movable in a direction perpendicular to the direction in which the blade receiver 20 extends, a surface-type patch repair technique can be easily achieved.

Incidentally, such a configuration of the outer pressing member that is integrally displaced can also be used for the configuration of the blade receiving portion as shown in FIG. 13, in place of the configuration made only of rubber.

Next, a second embodiment of the first invention will be described based on sectional views of the device examples illustrated in FIGS. 5 to 8.

As is clear from the figure, in this example, the repair material 2 is supplied from the blade receiver side, contrary to the previous example, and the device has been modified as follows, for example. It will be done. That is, the blade receiver 11
and a push-up head 10 surrounded by the blade holder 11 and housed inside the annular cutter 4 on the patcher head side, while leaving the patcher head as it is and operating as illustrated in FIGS. 5 to 8. Then, the first invention method is carried out.

That is, as illustrated in FIG. 5, the veneer 1 and the repair material 2 are overlapped and cut with the annular knife 4 so as to include the defective part 3 by lowering the patcher head, and then,
As shown in Fig. 6, the veneer 1 is
Pushing up by approximately the thickness of the annular cutter 4 causes a misalignment between the cutout 1a and the plug 2a,
The plug 2a and the veneer 1 on the outside of the annular cutter 4 are made substantially planar. As shown in FIGS. 7 and 8, the inner and outer pressing members 6 and 5
Thus, while maintaining the above-mentioned state, removal of the annular cutter 4 is completed to remove the defective part 3 of the veneer 1, and the plug 2a is fitted into the same part.

Next, a third embodiment of the first invention will be described based on sectional views of the apparatus illustrated in FIGS. 9 to 12.

In this embodiment, like the second embodiment, the repair material 2 is supplied from the blade receiver side, but the device is modified as follows, for example. That is, the blade receiving part is composed of only a flat plate-shaped blade receiving body 15, while the head part is provided with a positioning head 13 having a positioning member 12 instead of the inner pressing member on the inside of the annular cutter 4 as shown in the figure. Furthermore, the cutting edge of the annular cutter 4 is configured to have an inwardly inclined surface, and the first method of the invention is carried out by operating as shown in FIGS. 9 to 12.

That is, as shown in FIG. 9, by lowering the patcher head, the veneer 1 and the repair material 2 are overlapped and cut using the annular knife 4 so as to include the defective part 3, and then,
As shown in FIG. 10, when the annular cutter 4 is removed, the cutout 1a and the plug 2a inside the annular cutter 4 are lifted until they are stopped by the positioning member 12, causing a misalignment between the plug 2a and the annular cutter 4. The veneer 1 on the outside of the veneer 1 is substantially flat. This lifting function is obtained by configuring the cutting edge of the annular cutter 4 to be single-edged and to form an inwardly inclined surface. A needle-like body is provided in the annular cutter 4 to pierce the inner part of the annular cutter 4 and lift it up.
Alternatively, it can also be obtained by using them in combination.

As shown in FIG. 11, as the removal of the annular cutter 4 progresses further, the positioning member 12 keeps the plug 2a in the position as shown in the figure, at least until the annular cutter 4 stops trying to lift the plug 2a. This is to determine the position, and then the 12th
As shown in the figure, upwardly and separated together with the annular cutter 4,
It is possible to remove the defective part 3 of the veneer 1 and to fit the plug 2a in the same part.

As described above, as in the third embodiment described above, the patching method according to the first invention overlaps the repair material 2 on the defective part 3 of the veneer 1 to be repaired, overlaps the two with the annular cutter 4, and cuts the two pieces while the cutter is intervening. Using the blade as a guide, apply a deviation in the thickness direction so that the plug 2a on the inside of the blade and the repaired veneer 1 on the outside form a substantially planar shape, and then move the blade while maintaining the misaligned state. It is characterized by removing the plug, leaving the plug on the veneer, removing the defective part, and fitting the plug.
The main effect is the permanence of the shape of the defect cutout on the veneer side and the shape of the plug from the repair material suiting each other. Therefore, the certainty of a good fit is extremely high.
In other words, the central issue of patch repair technology, which is the desirable matching of shapes and fitting of the plug, can be achieved by the first invention method, which involves cutting with the same blade and fitting using the same blade as a guide, as described above. As a result, it became extremely stable.

This extremely rational technical idea can also be realized and provided as a patch repair method as described below, based on the same principle.

That is, it is the second invention (hereinafter simply referred to as the second invention) according to the present invention, and is implemented using the device examples illustrated in FIGS. 16 to 20. As illustrated in FIG. 16, an appropriate number of plugs 2a are prepared in advance from the repair material 2 and held inside the annular cutter 4, and then, as illustrated in FIGS. 17 to 20, a veneer is The purpose is to perform patch repairs on defective portions 3 of 1 without supplying repair material each time.

The device includes, for example, a pressing member 5 on the outside of the annular cutter 4 and a head plate 24 on the inside.
The head plate 24 has an inner pressing member 25 integrated with a piston in the cylinder.
The cylinder portion of the cylinder is provided with ports 26 and 27 for communicating compressed fluid. On the blade receiving side, the blade receiving part 23 for making plugs is of a flat shape as shown in Fig. 16, and the blade receiving part for repairing patches is as shown in Figs. 1 to 4. Similarly, as shown in FIGS. 17 to 20, it is composed of a blade holder 8 and a table 9.

Then, as shown in Fig. 16, the plug 2a is created at the appropriate time on the blade holder 23 provided at an appropriate place, and then the defective part 3 to be repaired reaches the blade holder 8 as shown in Fig. 17. Then, the patchier head moved and was ready for repair. In addition, when creating the plug 2a, the ports 26 and 27 are both in a fluid OUT state to reduce the pressure, so that the annular cutter 4 can hold the plug 2a inside by its frictional force. However, strong pressure when cutting the repair material to create the plug 2a prevents damage to the plug 2a, so it is desirable to press with the fluid in from the port 26 only when cutting. Then, patch repair is performed as shown in FIGS. 18 to 20.

That is, as shown in FIG. 18, the veneer 1 is cut with the annular knife 4 so as to include the defective part 3 by lowering the patcher head. At this time, preferably the port 26 is connected to the fluid IN and the port 27 is connected to the fluid IN to actuate the internal pressing member.
Press the inside of the annular cutter 4 as OUT. Next, as shown in FIG. 19, a step approximately equal to the thickness of the veneer 1 is given to the blade receiver 8 on the blade receiver side, and the inner pressing member 2 is
5, the cutout 1 inside the annular cutter 4 is pressed.
a and the plug 2a, causing a misalignment between the plug 2a and the plug 2a.
A and the veneer 1 on the outside of the annular cutter 4 are substantially planar. Then, as shown in FIG. 20, the annular cutter 4 is pulled out while maintaining the above state by the inner and outer pressing members 25 and 5. At this time, port 26
The state of fluid IN becomes fluid OUT when the cutting edge of the annular cutter leaves the veneer 1, and
Port 27 is designated as fluid IN.

In this way, one of the plugs 2a in the annular cutter 4 is fitted in place of the cutout 1a containing the defective part 3 of the veneer 1, thereby performing patch repair.

That is, according to the method based on this embodiment, the plug 2a is cut out from the repair material 2 using the annular cutter 4, and the plug is held inside the cutter, and then the defective part of the veneer is cut out with the cutter. While cutting, the blade is used as a guide to give a deviation in the thickness direction so that the plug 2a inside the blade and the veneer outside the blade form a substantially planar shape, and while maintaining the deviation state. Remove the cutter and replace the defective part with plug 2.
Since the repair is performed while leaving the plug 2a, in addition to the above-mentioned effects, other defects can be repaired by patching many times without supplying the repair material 2 each time until the stock of the plug 2a is exhausted. This has the effect of making it possible to perform intensive high-speed processing. Moreover, it is also possible to easily apply the second invention method to point type, line type, or surface type technology by using the above-mentioned modification technique.

As mentioned above, basic patch repair methods have been disclosed based on several embodiments based on rational technical ideas, but the following points should be made clear here.

One of them is a configuration in which the annular cutter 4 is provided with a shift between the inside and outside, and the inner plug and the outer veneer are made substantially planar. Depending on the manner in which the outer veneer is held, this planar structure may take on a curved shape in some cases. In other words, when holding a veneer on a suitable curved surface, the plug inside the annular cutter is also shaped on the inside and outside so that the surface is approximately the same, that is, the same surface. The structure is designed to cause misalignment. That is, it is made into a planar shape or a curved shape according to the surface exhibited by a veneer.

Another point is regarding the operation mode of the above-mentioned embodiment devices.The operation of these devices is as follows.
As mentioned above, the explanation has focused on the action of lowering the patcher head, but it can also be performed by raising the blade receiver side, or by rotating the patcher head and blade receiver upside down. may be provided and implemented by their relative actuation.

Regarding the shape of the cutting edge of the annular cutter 4, in addition to the circular one, it may be made into any suitable shape, or one thin disposable blade 28 may be bent as shown in FIG. Even if there is some discontinuity 29 between the sections, the desired annular cutter can be obtained within a practical range.

Regarding the treatment after fitting the plug into the veneer, secondary repairs using tapes, adhesives, etc. may be performed.

As described above, the present invention not only enables extremely good patch repair, but also serves as the basis for efficient techniques such as the wire method and the surface method, making a great contribution to industry.

[Brief explanation of drawings]

1 to 4 are side sectional views illustrating the apparatus for carrying out the first embodiment of the first invention in the order of operation;
Figures to Figures 8 are side sectional views illustrating an apparatus for implementing the second embodiment of the first invention in the order of operation, and Figures 9 to 12 are side sectional views of the apparatus for implementing the third embodiment of the first invention. A side sectional view illustrating the order of operation, FIG. 13 is the first
14 is a plan explanatory view of another device implementing the first embodiment of the first invention, and FIG. FIGS. 16 to 20 are side sectional views illustrating the apparatus for carrying out the second invention in the order of operation, and FIG. 21 is a perspective view of the annular cutter. In the figure, 1... veneer, 2... repair material, 3... defective part, 4... annular cutter, 5... outer pressing member, 6...
...Inner pressing member, 7...Head plate, 8...Blade receiver, 9...Table, 10...Pushing head, 1
1...Blade receiver, 12...Positioning member, 13...
Positioning head, 14... Head plate, 15... Blade receiver, 16... Head plate, 17... Steel plate, 18...
...Thin rubber, 19...Blade edge line, 20...Blade receiver, 2
DESCRIPTION OF SYMBOLS 1... Table, 22... Pressing part by outer pressing member, 23... Blade receiver, 24... Head plate, 25
...Inner pressing member, 26... Compressed fluid port,
27...Port for other compressed fluid, 28...Replaceable blade...
It is.

Claims (1)

[Claims] 1. Layer repair material on the defective part of the veneer, overlap it with an annular cutter, and use the cutter as a guide to separate the plug formed inside the cutter and the veneer on the outside. A veneer patch characterized in that the blades are shifted in the thickness direction so that they are substantially coplanar, the knife is removed while maintaining the shifted state, and a plug is left in place of the defective part for repair. Repair method. 2. Cut out a plug from the repair material with an annular cutter, hold the plug inside the cutter, then cut the defective part of the veneer with the cutter, and use the cutter as a guide while the cutter is intervening. A deviation is provided in the thickness direction so that the plug on the inside and the veneer on the outside form substantially the same plane, and the blade is removed while maintaining the deviation, so that the plug remains in place of the defective part. A veneer patch repair method characterized by repairing the veneer by