JP2563761B2 - Single plate full surface shape detector - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a veneer whole surface shape detecting device, and more particularly to cutting the front end and the rear end of a narrow veneer successively conveyed and aligning the next veneer with the rear end of the preceding veneer. The present invention relates to a veneer horizontal stripping machine that joins the front ends and laterally strips it, and a veneer full surface shape detection device that is suitable for application to a veneer sorter that sorts veneers according to the size of defects such as node holes. .

[0002]

2. Description of the Related Art As a conventional single-plate horizontal stripping machine, for example, Japanese Patent Laid-Open No. 63-149103 and Japanese Patent Publication No. 6-13162 are available.
Some of them are disclosed in Japanese Patent Publications.

FIG. 13 is a schematic diagram showing an example of a conventional single-plate horizontal stripping machine. This single-plate horizontal stripping machine 10 includes a pair of upper and lower entrance side conveyors 12 for carrying random size single sheets. , A veneer detector 14 that detects a defective portion of the random scale veneer carried in by the entrance side conveyor 12, and a front edge and a rear edge of the random scale veneer based on the detection information by the veneer detector 14. A knife 16A for sequentially cutting off defective portions to form an effective veneer, a slicing device 16 including a receiving blade 16B, and a top and bottom for carrying out the effective veneer created by the slicing device 16. A conveyor 20 having a separator 18 that oscillates in the upstream direction on the upstream side, and a joining device 22 that glues the front end surface of the effective veneer carried out by the conveyor 20 and joins the rear end surface of the preceding effective veneer. And a continuous shape joined in a sloping shape by the joining device 22. By cutting the plate into a predetermined length Blank veneer A
Is provided with a constant-length cutting device 24, and the constant-length veneer A cut by the knife 24A and the receiving blade 24B of the constant-length cutting device 24 is sent to the automatic deposition device 28 by the conveyer 26 and stacked at a predetermined position. It is designed to be stocked.

FIG. 14 conceptually shows the manufacturing process of the standard length single plate A by the single plate horizontal stripping machine 10. That is,
When a small-width irregular-sized veneer B as shown in FIG. 14 (A) is sent by the entrance-side conveyor 12, the size cutting device 16
As a result, the leading edge portion and the trailing edge portion of the random scale veneer B are respectively cut with a length exceeding the defective portion, and the leading edge scrap b and the trailing edge scrap b are cut.
The effective veneer C cut out as ′ is formed, and the effective veneer C shown in FIG.
The front end of the continuous veneer is joined to the rear end of the preceding effective veneer to form a continuous veneer (not shown), which is then cut into a predetermined length by the constant length cutting device 24. The veneer A is formed.

Conventionally, in a veneer horizontal stripping machine, in addition to cutting and removing the defective portions of the above-mentioned leading edge portion and trailing edge portion, if there are defects such as node holes in the veneer, the cutting and removal are performed. In order to detect the defect, a shape detecting device is installed in the single plate horizontal stripping machine.

In this shape detecting device, a light projector arranged opposite to each other with a single-plate conveying path interposed therebetween, and a large number of photoelectric tubes or the like for receiving light from the light projector are arranged in a direction orthogonal to the conveying direction. The light receiver is provided, and whether or not there is a defect at that position is determined by whether or not the light emitted from the light projector to the single plate being conveyed is received by the light receiver.

[0007] By the way, the drawbacks such as the node holes existing in the veneer are that the cut ends of the plywood produced by laminating the veneers and cutting them at a predetermined position can be seen from the outside. Although it is necessary to perform a strict inspection even at the stage of a veneer, there are cases in which the presence of defects within a certain size may be permitted, or even the presence may be ignored regardless of the size.

[0008]

However, since the conventional shape inspection apparatus cannot change the detection accuracy according to the position of the veneer in the width direction, all the defects are detected uniformly and the detection is performed. Since the defects are cut and removed based on the result, there is a problem that the number of times of cutting is increased, the work efficiency is low, and moreover, the discarded portions are increased, so that the resources cannot be effectively used.

The present invention has been made to solve the above-mentioned conventional problems, and the defects such as node holes existing in the conveyed veneer differ depending on the position in the veneer width direction orthogonal to the conveying direction. An object of the present invention is to provide a single-plate entire surface shape detection device that can detect even with detection accuracy.

[0010]

DISCLOSURE OF THE INVENTION The present invention is directed to a light projecting means for projecting light onto a conveyed veneer, and a predetermined pitch in a veneer width direction that is opposed to the light projecting means and is orthogonal to the carrying direction. A light receiving device having a light receiving element, and the light receiving device is present on the single plate based on the presence or absence of light received by the light receiving device when the light is projected from the light projecting device onto the single plate being conveyed. In a single-plate whole surface shape detection device that detects defects such as holes
The above-mentioned problems are solved by adopting a configuration in which the above-mentioned light receiving elements are configured to be able to change the permissible dimensions of sensitivity or defects individually or in arbitrary groups.

According to a second aspect of the present invention, an edge mask is provided which sets an edge mask for invalidating detection by a light receiving element whose edge is inside a predetermined size from both ends in the width direction of the veneer. A setting means may be provided. In this case, as in claim 3,
The edge mask setting means may be configured such that the edge mask can be set on the basis of a light shielding range when a light shielding material having a predetermined size is inserted between the light projecting means and the light receiving means.

According to a fourth aspect of the present invention, the entire width direction of the veneer is divided into one or more detection regions and non-detection regions, and the non-detection regions are set as detection targets. Partial mask setting means for setting a partial mask that disables detection by the element may be provided. In this case, as in claim 5, the partial mask setting means sets the partial mask based on the light shielding range when the light shielding material corresponding to the detection area or the non-detection area is inserted between the light projecting means and the light receiving means. It may be settable.

According to the present invention, as in claim 6, a light-receiving element group setting is such that a light-shielding material having a predetermined length of 1 or 2 or more is inserted at a corresponding position between the light projecting means and the light receiving means. It may be made executable based on the time-shading range.

According to the present invention, the allowable dimension of the defect is the number of adjacent light receiving elements that simultaneously receive light in the width direction of the single plate orthogonal to the carrying direction and depends on the light receiving elements in the carrying direction. You may make it set by each conveyance distance during light reception. In this case, the carrying distance during light reception may be set by the number of pulses output from the pulse generator installed in the carrying device.

According to a ninth aspect of the present invention, the light receiving element may further be provided with a storage means for storing the sensitivity or the allowable dimension set individually or for each group.

[0016]

In the present invention, with respect to the light receiving elements arranged at a predetermined pitch in the width direction of the single plate orthogonal to the transport direction,
Since the sensitivity or the allowable size of defects can be changed individually or for each group, the accuracy of detecting defects existing on a single plate can be freely changed and set at any position or range in the width direction. It becomes possible to do. Therefore, it is possible to perform automatic inspection of veneers in which the existence of defects of different dimensions at any position or range in the width direction is allowed. It is possible to reduce the amount of waste and create a suitable single plate according to the purpose, improve work efficiency, and effectively use resources.

In the present invention, when the edge mask setting means for setting the edge mask for invalidating the detection by the light receiving element whose detection target is the inner edge of each of the widthwise ends of the single plate by the predetermined dimension is provided. Is, because the shape of the widthwise both ends of the veneer hitting in the direction orthogonal to the transport direction is not perfectly aligned, the light receiving element at the position corresponding to the both cutouts may or may not receive light. However, this may be erroneously detected as a defect, but since this erroneous detection can be prevented, it is possible to stabilize the detection work.

At this time, the edge mask setting means can set the edge mask based on the light shielding range when the light shielding material of a predetermined size is inserted between the light projecting means and the light receiving means. In this case, for example, a light-shielding material with the same width as the product width manufactured by trimming both ends in advance is inserted at the corresponding position on the transport path, and light is projected when light is projected in that state. The edge mask can be easily set only by storing the range and performing an electrical process that invalidates (sensitivity is zero) a light receiving element that is out of the range during actual detection.

In the present invention, the entire width of the veneer is 1
In the case where a partial mask setting means for setting the partial mask for disabling the detection by the light receiving elements of the group whose detection target is the non-detection region is provided while dividing the detection region and the non-detection region Since it is possible to detect defects existing in an arbitrary position range in the width direction of the single plate, for example, at the position to be finally cut in the vicinity of both ends in the width direction, after cutting, Since it affects the appearance, it is possible to perform a strict detection of defects and perform an inspection to recognize the existence of defects inside the cutting position.
Therefore, by using such a veneer as a core material of a plywood and cutting it at a predetermined position to manufacture a plywood product, it is possible to effectively use the veneer and to make the appearance beautiful, and eventually the product. It also reduces the cost.

Further, at this time, the partial mask setting means can set the partial mask based on the light shielding range when the light shielding material corresponding to the detection area or the non-detection area is inserted between the light projecting means and the light receiving means. In this case, for example, a light blocking material with a length corresponding to the non-detection area is inserted so as to match the corresponding position on the transport path, and light is blocked when light is projected in that state. The partial mask can be set easily and accurately by storing the received light receiving elements and electrically processing so as not to count the light reception of the light receiving elements belonging to the group at the time of detection. It is also possible to use a light-shielding material corresponding to the detection region and mask the light-receiving element outside the light-shielding range at that time.

Further, in the present invention, the group setting of the light receiving elements is based on the light blocking range when a light blocking material having a predetermined length of 1 or 2 or more is inserted at a corresponding position between the light projecting means and the light receiving means. If it is feasible, it corresponds to the area where different detection accuracy is set in the width direction of the veneer,
It is possible to easily group the light receiving elements.

In the present invention, the allowable dimension of the defect is
In the width direction of the single plate orthogonal to the transport direction, the number of adjacent light receiving elements that simultaneously receive light, and in the transport direction, the transport distance during light reception by the light receiving elements.
The allowable dimension in the width direction can be set by (the pitch of the light receiving elements) x (the number of light receiving elements-1), and the allowable dimension in the carrying direction is
For example, it can be set based on the number of pulses output according to the transport distance from the pulse generator installed in the drive system of the transport device during light reception.

Further, in the present invention, when the light receiving element is provided with a storage means for storing the sensitivity or the allowable dimension set individually or for each group, different detection accuracy is obtained in the width direction of the single plate. By storing a plurality of types of detection patterns consisting of, it is possible to easily set a target detection pattern as necessary depending on the size and position of the defects allowed in the single plate.

[0024]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing a schematic structure of a single-plate whole surface shape detecting device according to an embodiment of the present invention.

The shape detecting apparatus of this embodiment is provided with the front conveyor 3
0, a projector that is installed between the rear conveyors 32 and projects light onto a veneer B (described here as a random veneer shown in FIG. 13) that is conveyed in the direction of the arrow by both of the conveyors 30 and 32. 34 and a light receiver 36 arranged to face the light projector 34, the light projector 34 is provided on the single plate B being conveyed.
Defects such as holes existing in the veneer are detected based on the light received by the light receiver 36 when light is projected from.

The light receiver 36 is formed by connecting a plurality of light receiving units 36A having a length a, a width b and a height c, which are enlarged and shown in FIG. 2, in the length direction as schematically shown in FIG. Is configured. In this light receiving unit 36A, a light receiving element 36B made of, for example, a phototransistor is provided with a predetermined pitch
Are arranged in the length direction, and the light receiving unit 36
As for A, an arbitrary number can be connected by inserting a connecting bar (not shown) into the connecting groove 36C.

As the light receiving unit 36A, a = 2
As an example, one having 80 mm, b = 30 mm, c = 85 mm, P = 5 mm and 56 phototransistors is provided. Light receiving unit 36A of this size
The shape can be detected by using a light receiver 36 formed by connecting five pieces as shown in FIG. 3 when the single plate has a width of 4 and 8 pieces when having a width of 6.

On the other hand, although not shown, the projector 34 has substantially the same size and shape as the light receiving unit 36A, and a light emitting diode (LED) is arranged at the same pitch instead of the phototransistor. The units can be similarly connected and used. The light projector may be another light source such as a fluorescent lamp.

In the shape detecting apparatus of this embodiment, the permissible size of the sensitivity or the defect is individually or in groups for the above-mentioned large number (280 for P = 5 mm in the case of the 4 inch) of the light receiving elements. Can be changed.

That is, each light receiving element 36B of the above light receiver 36
The light reception signal by the detection control device 3 for controlling various detection operations such as detection of defects such as node holes based on the signal.
8, the setting signals from the edge mask setting device 40, the partial mask setting device 42, and the group setting device 44, which will be described in detail below, and the rotation of the drive motor 46 that drives the front conveyor 30. A pulse signal from a pulse generator 49 that generates a pulse corresponding to the number and an input signal from an input device 50 such as a key switch are input, respectively.
A display device 52 that displays various information such as input data and detection data, and a storage device 54 that can store and read the various information are connected to the device 8.

The edge mask setting device 40 has a function of setting an edge mask that invalidates the detection by the light receiving elements whose edges are inside the predetermined size from both ends in the width direction of the veneer. What is this edge mask?
As also shown in FIG. 4 showing the relationship between the light receiver 36 and the veneer to be detected, the light receiving element whose edge part Be is to be detected so that the edge part Be of the veneer B is not detected. It means to invalidate the light receiving element 36B in the range indicated by M on the outside including.

The edge mask setting device 40 can select an automatic mode or a manual mode. In the automatic mode, as shown in FIG. 5, the light-shielding plate S ₁ having the same predetermined size as the width of the single plate B to be detected is previously projected by the projector 34.
It is possible to input the plate width of the specified dimension as the length of the light-shielding range by inserting it between the optical receiver 36 and the light receiver 36 and pressing a setting button (not shown) in that state. By inputting the plate width in this way, the light receiving element 36B that is out of the plate width can be disabled, and the margin m (5 to 2
The light receiving element 36B (which can be designated within the range of 5 mm) can be automatically disabled.

In this automatic mode, as shown in FIG. 4, the light shield plate has a size of L ', which is short at both ends by m, and this light shield plate is inserted between the projector 34 and the light receiver 36. Similarly, the setting button may be pressed to input L'as the length of the light-shielding range at that time, and the light-receiving element 36B outside this range, that is, light-received at that time may be invalidated.

In the edge mask setting device 40, the mask range M can be set by selecting the manual mode and designating a predetermined range with the input device 50.

The partial mask setting unit 42 divides the entire width of the veneer into one or more detection areas and non-detection areas, and disables detection by the light receiving elements of the group whose detection target is the non-detection areas. It has a function to set the partial mask. The partial mask is a light-receiving element 36 whose detection target is to allow a defect to exist in one or more arbitrary regions inside the edge portion.
This means that B is invalidated.

The partial mask setting device 42 can also select the automatic mode or the manual mode as the setting method. In the manual mode, similarly to the case of the edge mask setting device 40, by designating the range to be set by the input device 50, the light receiving elements in the range can be invalidated.

In the automatic mode, when there is only one non-detection area, as shown in FIG. 6, a shading plate S ₂ having the same size as the width of the area is provided at a corresponding position between the projector 34 and the light receiver 36. , And presses the setting button (not shown) with the light projected onto the light receiver 36.
The light receiving element 36B of M) can be invalidated.

The partial mask is composed of two light-shielding plates S shown in FIG.
_As shown in the case of setting using ₃ and S ₄ , it is possible to use a plurality of (three or more) light-shielding plates and set for a plurality of groups of light receiving elements.

The setting of the partial mask is not limited to the light-shielding plate corresponding to the non-detection region as described above. Conversely, a light-shielding plate corresponding to the detection region is used, and the light-receiving elements of the group outside the light-shielding range are used. May be disabled.

In the shape detecting apparatus of this embodiment, the sensitivity and the allowable dimension (especially the dimension in the carrying direction) can be set for each individual light receiving element, and the light receiving elements arranged at a predetermined pitch can be grouped. A group setter 44 described below is provided, and the sensitivity and the allowable dimension can be set for each light receiving element of each group set by the group setter 44.

The group setting by the group setter 44 is performed by manual input from the input device 50, for example, dividing into groups each including a maximum of eight light-receiving elements,
It can be set. Further, in the group setting device 44, as in the case of the partial mask setting device 42,
The grouping of the light receiving elements can be automatically set based on the light blocking range when one or more light blocking members having a predetermined length are inserted in the corresponding positions between the light projector 34 and the light receiver 36. ing.

Further, the shape detecting apparatus of the present embodiment is provided with a sensitivity setting device 46 for setting the sensitivity to the light receiving element, and the sensitivity setting device 46 causes the difference in the amount of transmitted light due to the difference in the thickness of the single plate. In consideration of the above, the sensitivity can be set to 250 steps, for example.

The allowable size of the above defect is the number of adjacent light receiving elements that simultaneously receive light in the single plate width direction orthogonal to the carrying direction, and the carrying distance during light receiving of the same light receiving element in the carrying direction. 50 can be set individually. The transport distance during light reception is specifically set by the number of pulses output from a pulse generator (PG) 49 that generates a pulse according to the rotation speed of a drive motor 48 for transporting and driving the front conveyor 30. The permissible dimension in the carrying direction can be set for each individual light receiving element. Therefore, the permissible dimension can be set in the width direction of the single plate in units of the pitch P of the light receiving elements and in the transport direction in an arbitrary dimension (for example, in pulse units).

It is also possible to provide a switch so as to count the number of pulses and light-receiving elements at an arbitrary magnification, and make the detection accuracy of the allowable defects arbitrarily coarse if necessary.

Various information such as the mask range set by the edge mask setting device 40 and the partial mask setting device 42, the sensitivity set by the group setting device 44 or the sensitivity and the allowable dimension set individually described above are displayed on the display device. It can be displayed on 52, stored in the storage device 54, and read out to the detection control device 38 as needed to be used for detection control.

A plurality of types of information such as edge range, group range, sensitivity, and allowable size are stored in the storage device 54 as detection patterns, and a desired detection pattern is read out as necessary to set the detection conditions. You can also do it.

Next, the operation of this embodiment is applied to a single-plate horizontal stripping machine whose shape detecting device is substantially the same as that shown in FIG. 13, and is preset by the shape detecting device. When a defect larger than the allowable size is detected, an effective veneer is prepared by cutting the dimensional cutting device 16 before and after the defect, and then the effective veneer is joined according to a conventional method to form a continuous veneer. Then, the case of finally producing the standard length veneer A will be described.

Although not shown in the drawings, a single-plate horizontal stripping machine to which the shape detecting device of this embodiment is applied is shown in FIG.
In the vicinity of the single plate detector 14 in FIG.
6 has been installed, and the entrance side conveyor 12 has been devised so that FIG.
As shown in FIG. 3, there is no light shield between the front conveyor 30 and the rear conveyor 32, and the projector 34 and the light receiver 3 are provided.
6 is provided. However, when there is no choice but to interpose a transport chain or belt between the light projector 34 and the light receiver 36, the chain or belt may be made as thin as possible.

As described above, in the present embodiment, the edge mask can be set within the predetermined range by the edge mask setting device 40. Therefore, even if the shape of the edge of the single plate B is not uniform, it is not affected. The shape can be detected stably.

[0051] In the present embodiment, the partial mask setter 42, for example, one light shielding plate S ₂ as FIG. 6
When the partial mask PM is set by, the non-mask area near both ends in the width direction of the veneer B is detected with high accuracy, for example, with an allowable dimension of 5 mm in the width direction and 1 mm in the conveying direction, and any defects are detected in the mask area. You can turn it off. In this way, the continuous veneer D in which the effective veneer in which the defective portion is cut and removed based on the result of setting and detecting the partial mask PM is horizontally stripped is
As shown in the conceptual diagram of FIG. 8, there are defects F such as large nodal holes in the mask region, but it is possible to make almost no defects in the non-mask region.

Therefore, in the case where a plywood is manufactured by using a single veneer having no defects on both the front and back sides and a standard veneer obtained from the continuous veneer D shown in FIG. Since the cut surfaces cut for alignment can be made beautiful, it is possible to manufacture a plywood product having a beautiful appearance, although the defect F exists inside.

FIG. 9 shows the continuous veneer D obtained when two masks S ₃ and S ₄ are used to set partial masks at two positions as shown in FIG. It is a conceptual diagram equivalent to eight. Since this continuous veneer D can detect not only the vicinity of both ends as in the case of FIG. 8 but also the vicinity of the center with high accuracy, it is finally cut at the center position.
It can be effectively used as a core material for manufacturing plywood having a width half that of the above case.

In this embodiment, the light receiving elements are divided into groups by the group setter 44 and the detection accuracy is set for each group, so that the continuous single plate D as shown in FIG. 10 or 11 can be produced. it can. That is, in the continuous single plate D of FIG. 10, the light receiving element is divided into three groups in the vicinity of both ends and inside thereof, and the high precision HQ is applied to both end groups.
(Allowable dimension: 5 mm in width direction, 1 mm in conveyance direction), low precision LQ for inner group (allowable dimension: 30 mm in width direction, 15 mm in conveyance direction) is obtained. Further, the continuous single plate D in FIG. 11 is divided into seven groups which are alternately divided into a narrow group and a wide group, and each of the four narrow groups has a high precision HQ and each of the three wide groups has a low precision LQ.
The continuous veneer D obtained by setting

The continuous single plate D shown in FIG. 10 or FIG.
It can be effectively used as a core material for plywood that is finally cut at the high-precision detection portion.

In the present embodiment, in the case of setting a predetermined accuracy of, for example, a permissible dimension: a width direction of 5 mm and a conveyance direction of 3 mm with respect to a light receiving element whose detection target is at least a predetermined range near both side end portions of the single plate It is also possible to effectively use a veneer having narrow cracks called so-called water cracks at its side edges.

FIG. 12 shows the difference in cutting length between the case where a single plate having water cracks is cut by the conventional apparatus and the case where the apparatus of this embodiment is used. Conventionally, the cutting length was X because all the water cracks were cut out, whereas according to the present embodiment, cracks having a dimension in the conveying direction of 3 mm or less are allowed, so the cutting length is Y. Can be shortened. When the cutting is performed with the length Y as described above, inner cracks remain, but this veneer can also be used as a core material of plywood without problems.

Further, it becomes impossible to detect a normal defect such as a case where dust such as veneer scrap remains on the light receiving portion, or the light quantity of the projector is lowered for some reason. In preparation for the case, the light intensity is output by distinguishing the light receiving element that is still in the detection state when the machine is started or the light receiving element that is continuously in the detection state for a certain sufficiently long set time during operation. It is effective to provide a drop warning and a dust warning. In this case, if a chain, a belt or the like has to be interposed between the light receiver and the light projector, a mask is set in this portion.

Although the present invention has been specifically described above, the present invention is not limited to the above-described embodiments, but various modifications can be made without departing from the scope of the invention.

For example, in the above-mentioned embodiment, the shape detecting device applied to the single-plate horizontal stripping machine is shown, but it is applied to the single-plate sorter used for simply sorting the single plates according to the degree of the existing defects. It may be.

When used in a veneer sorter, the number of pulses in the defect-free portion in the conveying direction is counted and compared with a set number of pulses which responds to a predetermined standard size, and the veneer has a predetermined standard size or more. It can also be used to determine whether or not there is.

[0062]

As described above, according to the first aspect of the present invention, it is possible to detect the defect of the conveyed single plate with different accuracy depending on the position and range in the width direction.

According to the second aspect of the present invention, it is possible not to detect both side end portions of the veneer having a non-uniform shape, so that stable detection work can be performed.

According to the third aspect of the invention, the edge mask can be set easily and accurately.

According to the fourth aspect of the present invention, only defects in a specific range such as a cutting position during plywood manufacturing are detected with high accuracy,
Disadvantages in other ranges can be ignored.

According to the fifth aspect of the invention, the partial mask can be set easily and accurately.

According to the invention of claim 6, the light receiving elements arranged at a predetermined pitch can be grouped easily and accurately.

According to the invention of claim 7, the permissible dimension in the width direction can be set in units of the pitch of the light receiving elements, and the permissible dimension in the transport direction can be set to the transport distance of an arbitrary length.

According to the invention of claim 8, the allowable dimension in the carrying direction can be set in units of the number of pulses output from the pulse generator.

According to the ninth aspect of the present invention, it is possible to store a plurality of different detection accuracy patterns that have been set once, and read and reset the desired detection accuracy pattern.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a shape detection device according to an embodiment of the present invention.

FIG. 2 is an enlarged perspective view showing a photoreceiver unit that constitutes a photoreceiver applied to the shape detection device.

FIG. 3 is an explanatory diagram showing a relationship between a light receiver and a light receiver unit.

FIG. 4 is a schematic plan view for explaining an edge mask.

FIG. 5 is a schematic front view for explaining a method of setting an edge mask.

FIG. 6 is a schematic front view for explaining a partial mask setting method.

FIG. 7 is a schematic front view for explaining another method of setting a partial mask.

FIG. 8 is an explanatory diagram showing an effect of a partial mask.

FIG. 9 is another explanatory diagram showing the effect of the partial mask.

FIG. 10 is an explanatory diagram showing an effect when the setting accuracy is changed for each group.

FIG. 11 is another explanatory diagram showing the effect when the setting accuracy is changed for each group.

FIG. 12 is an explanatory diagram showing the effect of detecting water cracks.

FIG. 13 is a schematic explanatory view showing an example of the overall configuration of a single-plate horizontal stripping machine.

FIG. 14 is an explanatory diagram showing an outline of a working process with a single-plate horizontal stripping machine.

[Explanation of symbols]

 A ... Standard single plate B ... Random single plate C ... Effective single plate D ... Continuous single plate S ... Shading plate 34 ... Emitter 36 ... Photoreceiver 36A ... Photoreceiver unit 36B ... Photodetector 38 ... Detection control device 40 ... Edge Mask setting device 42 ... Partial mask setting device 44 ... Group setting device 46 ... Sensitivity setting device 49 ... Pulse generator 50 ... Input device 52 ... Display device 54 ... Storage device

Claims (9)

(57) [Claims] 1. A light projecting means for projecting light onto a conveyed single plate, and light receiving elements are arranged at a predetermined pitch in a width direction of the single plate facing the light projecting means and orthogonal to the conveying direction. A light receiving unit is provided, and defects such as holes existing in the single plate are detected based on whether light is received by the light receiving element when light is projected from the light projecting unit onto the single plate being conveyed. A single-plate whole-face shape detecting device, wherein the light-receiving elements can individually or individually change the permissible dimension of the sensitivity or the defect. 2. The method of claim 1, the edge mask setting means for setting an edge mask to disable the detection by the light receiving element from both ends in the width direction of the veneer to each detected edge portions of a predetermined size inside is provided A single-plate full-face shape detection device characterized in that 3. The edge mask setting means according to claim 2, wherein the edge mask can be set on the basis of a light shielding range when a light shielding material having a predetermined size is inserted between the light projecting means and the light receiving means. A single-plate full-face shape detection device characterized in that 4. The whole of the width direction of the veneer is divided into one or more detection areas and non-detection areas, and the detection by the light receiving elements of the group whose detection target is the non-detection areas is invalidated. A single-plate whole surface shape detecting device, characterized in that partial mask setting means for setting a partial mask to be set is provided. 5. The partial mask setting means according to claim 4, wherein the partial mask setting means sets the partial mask on the basis of a light shielding range when a light shielding material corresponding to the detection area or the non-detection area is inserted between the light projecting means and the light receiving means. A single-plate full-face shape detection device characterized by being settable. 6. The light receiving element group setting according to claim 1, based on a light blocking range when a light blocking material having a predetermined length of 1 or 2 or more is inserted at a corresponding position between the light projecting means and the light receiving means. A single-plate full-face shape detection device characterized by being implemented by 7. The allowable dimension of the defect according to claim 1, wherein the allowable dimension of the defect is the number of adjacent light receiving elements that simultaneously receive light in the single plate width direction orthogonal to the transport direction, and the transport distance during light reception by the light receiving elements in the transport direction. The single-plate whole surface shape detecting device characterized by being set respectively. 8. The single-plate whole surface shape detecting device according to claim 7, wherein the carrying distance during light reception is set by the number of pulses output from a pulse generator installed in the carrying device. 9. The single-plate whole surface shape detecting device according to claim 1, further comprising storage means for storing the sensitivity or the allowable dimension set individually or for each group with respect to the light receiving element.