JPH0872005A - Attitude determination device for sawdust - Google Patents

Abstract

(57) [Abstract] [Objective] The present invention sets a predetermined posture on the way of transferring a plate-like sawing material having an asymmetrical edge to the side edge portion of a backboard or the like obtained by sawing a raw wood. For this reason, the present invention relates to a device for determining a transfer attitude, and provides a novel attitude determination device for sawdust material, which is capable of automatically determining the attitude of the sawdust material. In a device for determining a posture on a conveyor for transferring a plate-shaped cutting material A having upper and lower non-symmetrical edges on its side edges, a contacting surface of the cutting material A is brought into non-contact with the conveying surface of the conveyor. A sensor group for radiating the sensing medium is provided, and the sensor group radiates the sensing medium in a direction substantially orthogonal to the sensed object and three directions obliquely intersecting the orthogonal direction and the front and rear, and sensing from these three directions. The radiation locus of the medium substantially converges at the measurement position, and the convergence point is set slightly above the transport surface of the transfer conveyor.

Description

Detailed Description of the Invention

[0001]

[Object of the invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is intended to set a predetermined posture in the course of transferring a plate-like sawn material having edges that are not symmetrical up and down to a side edge of a backboard or the like obtained by sawing a log. The present invention relates to a device for determining a transfer posture.

[0002]

BACKGROUND OF THE INVENTION A so-called back plate that is cut from a log of raw wood or a plate with ears (or a narrow plate) adjacent to the back plate has upper and lower asymmetric edges called ears at its side edges.
In the case of further splitting such a cut material into two pieces, or when performing an ear-grip operation of cutting off the ear portion, in order to perform stable transfer of the cut material, the skin surface often faces upward. Transfer in posture. For this reason, conventionally, an operator always monitors the supplied grind material during the transfer, and when a grind material having a posture opposite to the grind posture comes, the appropriate reversing device is operated to operate the regular grind material. He was operating to take a posture. Therefore, a dedicated operator must be allocated for this purpose, and the operator may be overlooked. Therefore, it has been desired to monitor the sawn material and automate the operation process of the reversing device.

[0003]

[Technical Items Attempted to Develop] The present invention has been made in consideration of such a background, and provides a novel attitude determination device for a sawdust material capable of automatically determining the attitude of the sawdust material. It is an attempt to develop.

[0004]

Configuration of the Invention

[Means for Achieving the Object] That is, the attitude determining device for the sawdust material according to claim 1 is an apparatus for determining the attitude on a conveyor for transferring a plate-like sawdust material having upper and lower non-symmetrical edges on side edges. A sensor group for radiating a non-contact sensing medium is provided toward the conveying surface of the sawdust transfer conveyor, and the sensor group obliquely intersects with a direction substantially orthogonal to the sensed body and from the orthogonal direction and the front and rear. The sensing medium is radiated from three directions, and the radiation trajectories of the sensing medium from these three directions are substantially converged at the measurement position, and the convergence point is set slightly above the transport surface of the transfer conveyor. The present invention is intended to achieve the above object.

[0005]

According to the invention as set forth in claim 1, during transfer of a plate-like sawing material having upper and lower asymmetric edges to a side edge portion of a back plate or the like obtained by sawing a raw wood, The transfer posture is automatically determined to set the posture.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on the illustrated embodiments. The main members constituting the sawing apparatus in which the posture discriminating device 6 of the present invention is installed are a cutting conveyor 2 and a return conveyor 3 which are provided so as to partially surround the cutting apparatus 1 which directly performs the cutting action. , A material supply unit 5. The grinding conveyor 2 is arranged on the grinding line of the grinding device 1 in the front-rear direction, and the return conveyor 3 extends from the grinding preparation position to the sorting position after grinding so as to be substantially along the grinding conveyor 2. It is provided in the range. Then, a sorting device 4 is provided on the rear side in the sawing direction so as to cross the sawing conveyor 2 and the returning conveyor 3. A material supply unit 5, a waste material extraction unit 7, and a product material extraction unit 8 are provided around the grinding conveyor 2 and the return conveyor 3.

Each of these members will be described below. It should be noted that the materials from raw wood to the state of being ground are collectively referred to as a sawing material A, and a sawing material having ears a ₀ and a ₁ on both side edges is provided on both ears A ₀ and only one side edge. ear material a ₁ a挽割material having ears a _1, ears a _0, the product material the挽割material desired thickness a ₁ is cut off a _2, up ground product material a ₂ possible residual wood Is defined as a turning material A ₃ .

First, the attitude determination device 6 of the present invention will be described. This component comprises a posture sensor 61 and a material thickness sensor 62 as main components. The attitude sensor 61 is provided below the horizontal portion of the sensor frame 63, which is provided in a recumbent state above the supply device 27 in the material supply unit 5, and below the conveyance operation surface of the sawing conveyor 2. Also, the sensor frame 6
A material thickness sensor 62 is provided in the horizontal portion of 3. Further, the reversing device 64 is set in a portion of the supply device 27 that is closer to the cutting conveyor 2 and is set below the conveying action surface of the cutting conveyor 2 sufficiently.

The attitude sensor 61 is defined in claim 1, and as shown in FIGS. 1 and 2, is a group of sensors that emits a non-contact sensing medium, and is an element that emits infrared rays as the sensing medium. The attitude sensor 61A, the attitude sensor 61B, and the attitude sensor 61C that constitute the sensor group are light emitting sides, and radiate the sensing medium from a direction substantially orthogonal to the sensed object and three directions obliquely intersecting the orthogonal direction and the front and rear. Thus, the sensor frame 63 is provided in a line along the supply device 27 in the horizontal portion. Of course, this arrangement employs an appropriate mode depending on the conveying posture of the cut material A, such as when the cut material A is conveyed in the longitudinal direction, such as perpendicular to the supply device 27.

Infrared ray R emitted by the sensor group
Since it is sufficient that a, Rb, and Rc are converged to the extent that the attitude of the sawdust material A can be measured, the attitude sensors 61A, 61B, and 61C may be provided so that they are not on the same plane.

The attitude sensors 61a, 61 on the light receiving side
b and 61c are respectively provided below the conveying action surface of the supply device 27. The infrared radiation loci from these three directions substantially converge at the measurement position, and the convergence point is set slightly above the transport surface of the transfer conveyor. The attitude sensors 61a, 61b on the light receiving side,
Reference numeral 61c designates attitude sensors 61A and 61A on the light emitting side, respectively.
Infrared rays emitted from B and 61C are received, and an OFF signal is output when the infrared rays are received, and an ON signal is output when the infrared rays are blocked. Of course, such a non-contact sensor that uses sound waves, radio waves, magnetism or the like can also be applied. The output may be reversed between ON and OFF.

Next, the material thickness sensor 62 will be described. This is a microwave type distance sensor which is provided in the horizontal portion of the sensor frame 63 and faces the conveyance operation surface of the supply device 27, and can measure the distance from the installation position. Therefore, the thickness of the sawdust A conveyed by the supply device 27 can be detected.

Next, the reversing device 64 will be described. This is set in the part of the supply device 27 from the grinding conveyor 2 so as to be sunk below the conveying action surface of the grinding conveyor 2, and one end of the reversing plate 65 which is a plate-shaped member is A motor M is mounted on the feeder frame 28 and is fixed to a main shaft 66 directly or indirectly connected to a drive shaft thereof, and is rotated about the main shaft 66. By this rotation, the reversing plate 65 projects upward from the conveying action surface of the sawing conveyor 2, so that the sawing material A is reversed (upside down). The attitude determination device 6 for the sawed material A according to the present invention has the specific structure as described above. Hereinafter, a mode of sawing work by this device will be described.

First, the both-ear material A ₀ is supplied to the material supply section 5,
As the supply device 27 moves, it enters the sensing zone Z below the sensor frame 63. FIG. 4 shows a side view of this state. The sensing zone Z is the infrared ray Ra.
And the conveyance surface of the supply device 27 from the intersection α to the intersection γ of the infrared ray Rc and the conveyance surface of the supply device 27. Further, the intersection of the infrared ray Rb and the conveying surface of the supply device 27 is β, the state in which the tip of the sawing material A is between the intersections α and β is the initial state, and is between the intersection β and the intersection γ. The state is a middle stage state, and the state that exceeds the intersection γ is a latter stage state.

In FIG. 4 (a), both ears A ₀ are in the cutting posture, and only the infrared ray Ra is blocked in the initial state.
Then, in the medium-term state, the infrared rays Ra and the infrared rays Rb are blocked. In the latter stage all infrared rays Ra, Rb, R
c is cut off. Further, in FIG. 4B, the both ears A ₀ are in a state opposite to the cutting posture, and only the infrared ray Rc is blocked in the initial state. Then, in the medium-term state, the infrared rays Rb and infrared rays Rc are blocked. In the latter state, all infrared rays Ra, Rb and Rc are blocked. Further, in FIG. 4C, the infrared ray Ra and the infrared ray Rc are blocked when the turning material A ₃ is in the initial state. Then, in the middle state, all infrared rays Ra, R
b, Rc are cut off. In the latter state, all infrared rays Ra, Rb and Rc are blocked. The outputs of the attitude sensors 61a, 61b, 61c in each of these states are as shown in Table 1 when ON is 1 and OFF is 0.

[0016]

[Table 1]

As can be seen from Table 1, since the output patterns of the posture sensors 61a, 61b, 61c at the initial and middle stages are different depending on the posture of the both ears A ₀ , the both ears A
A posture of ₀ can be determined.

Of course, the posture sensors 61a, 61b, 61
Since the output pattern of each c changes depending on the shape of the sawing material A and the like, the distance between the individual sensors and the position of the convergence point may be variable.

When the posture sensor 61 detects that the both ears A ₀ having the posture opposite to the cutting posture has come, the motor M in the reversing device 64 is driven and the main shaft 66 rotates to reverse the rotation. The plate 65 projects upward from the conveying operation surface of the sawing conveyor 2, and reverses the sawing material A (upside down). Further, when the product material A ₂ is erroneously supplied in the edge picking process, this can be detected to prevent the product material A ₂ from being sent to the sawing conveyor 2.

In this way, both ears A ₀ are sent to the grinding conveyor 2 by raising the feeding device 30 from the material feeding section 5 in the grinding posture, and subsequently, the grinding process is performed. The cutting device 1 is a known device to which a double saw circular saw machine is applied as an example, and performs a work of cutting one ear portion a ₀ from both ear materials A ₀ . That is, both ears A ₀ placed on the supply device 27 in the material supply unit 5 by the operator or the automatic transfer device are appropriately cut by the saw conveyor 2.
The pieces are transferred one after another in a shredded posture.

At this time, one of the ears a ₀ is ground by the grinding device 1. The ear material a ₁ that has reached the sorting device 4 side and the ear portion a _{0 that} is the waste material that has been ground and split are first lifted by the waste material extraction arm 20 so that the ear portion a ₀ is supported on the chain and the waste material a ₀ is supported. It falls to the take-out part 7 side.

On the other hand, the one ear material A ₁ is transferred to the return conveyor 3 side. That is, this work is carried out by raising the product material take-out arm 23, whereby the one ear material A ₁ remaining on the sawing conveyor 2 is scooped up from below and taken into the return conveyor 3 side, Then, the product material take-out arm 23 is lowered and placed on the return conveyor 3.

In the previous step, the one ear material A ₁ is subsequently obtained by cutting out some or some of the plate materials or square pieces from this material, and the work uses the one ear material A ₁ as a starting material. The product material A ₂ is cyclically repeated a plurality of times until there is no room to grind the product material A ₂ . Due to this type of work, this is called "turn grinding".

Further, the grinding device 1 is a horizontal saw band saw,
It is also possible to measure the thickness of the sawed material A by the material thickness sensor 62 and carry out the turning and sawing in the horizontal direction until the sawing of the product material becomes impossible in the manner described above.

[0025]

The present invention has the constitution as described above, and thereby exhibits the following effects. According to the invention described in claim 1, in order to set a predetermined posture in the middle of transferring a plate-like sawing material having an asymmetrical edge to a side edge portion of a backboard or the like obtained by cutting raw wood The transfer posture is automatically determined. Based on this determination, it becomes possible to automatically supply the sawdust material A in the sawdust posture.

[Brief description of drawings]

FIG. 1 is a perspective view showing a lumber mill including a posture determination device of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a side view of the same.

FIG. 4 is a skeletal side view showing a positional relationship between a posture determination device and a material.

FIG. 5 is an explanatory diagram skeletonly showing a processing step of both ear materials.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Grinding device 2 Grinding conveyor 3 Return conveyor 4 Sorting device 5 Material supply unit 6 Attitude determination device 7 Waste material unloading unit 8 Product material unloading unit 20 Waste material unloading arm 23 Product material unloading arm 27 Feeding device 28 Feeding device frame 29 Feeding device Chain 30 Supply device 61 Attitude sensor 61A Attitude sensor 61B Attitude sensor 61C Attitude sensor 61a Attitude sensor 61b Attitude sensor 61c Attitude sensor 62 Material thickness sensor 63 Sensor frame 64 Inversion device 65 Inversion plate 66 Main axis α Intersection β Intersection γ Intersection point A Grinding material A ₀ Both ears A _{1 One} ear A ₂ Product material A ₃ Turning material a ₀ Ear a ₁ Ear M Motor Ra Infrared Rb Infrared Rc Infrared Z Sensing zone

Claims (1)

[Claims] 1. An apparatus for determining a posture on a conveyor for transferring a plate-shaped sawing material having upper and lower non-symmetrical edges on its side edges, in a non-contact manner toward a conveying surface of the conveyor for transferring the sawing material. A sensor group for radiating the sensing medium is provided, and the sensor group radiates the sensing medium in a direction substantially orthogonal to the sensed object and three directions obliquely intersecting the orthogonal direction and the front and rear, and sensing from these three directions. The attitude determination device of the sawing material, wherein the radiation trajectory of the medium substantially converges at the measurement position, and the convergence point is set slightly above the transport surface of the transfer conveyor.