JP2003065929A - Shaker for measuring young's modulus in wood such as veneer, vibration reception machine, and measuring instrument for young's modulus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration machine for measuring Young's modulus in wood such as veneer that reliably gives perpendicular vibration to the wood such as veneer from a first mobile unit, at the same time detects that the first mobile unit has given perpendicular vibration by a first acceleration detector, and accurately obtains the propagation speed of the perpendicular vibration in the wood such as veneer for accurately measuring the Young's modulus, to provide a vibration reception machine for measuring the Young's modulus of wood such as veneer that freely moves in a direction away from the wood even if a second mobile unit is in contact with the wood such as veneer, appropriately vibrates and receives perpendicular vibration from the wood such as veneer, and to provide a measuring instrument of Young's modulus in the wood such as veneer that can efficiently and accurately measure the Young's modulus in the wood such as veneer in a transport state. SOLUTION: The first mobile unit is reciprocated toward the wood such as veneer in contact with the wood such as veneer. The acceleration of the first mobile unit is detected by reciprocation by the first acceleration detection that is provided at the first mobile unit. Force toward the wood such as veneer is applied to the first mobile unit by an actuation member, thus generating perpendicular vibration when measuring the Young's modulus in the wood such as veneer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a Young's modulus measuring vibrator and receiver, and a Young's modulus measuring device used for measuring Young's modulus of wood such as veneer veneer (hereinafter referred to as veneer).

[0002]

2. Description of the Related Art For a veneer used for manufacturing plywood, for example, there are various types of raw wood on which the veneer is cut. Even if the same type of wood is used, the sapwood and core material of the raw wood are different. Since the material of the veneer is not uniform and may be greatly different, it is desirable to use a veneer of a material suitable for the purpose.

The Young's modulus is one of the factors for determining the properties of the veneer. As a device for measuring the Young's modulus of a single plate, for example, a Young's modulus automatic measuring device disclosed in Japanese Patent Publication No. 6-78974 or US Pat. No. 5,097,8 is used.
A test device using ultrasonic waves shown in Japanese Patent No. 81 is known.

[0004]

However, in the former case, the Young's modulus is measured from the fundamental vibration period when the wood is hit and the properties of the wood. It was difficult to measure Young's modulus at a plurality of points while conveying an object.

Further, in the latter, although it is possible to detect defects in the whole log which is the object to be inspected, there is a problem that a large number of transducers are required on the transmitting side and the receiving side, and the apparatus becomes expensive. Was.

The present invention has been invented in order to solve the above-mentioned conventional drawbacks, and its object is to ensure that longitudinal vibration is reliably applied from the first moving body to wood such as veneer. At the same time, the first acceleration detector detects that the first moving body has applied the longitudinal vibration, and the propagation speed of the longitudinal vibration in the wood such as the veneer can be accurately obtained to measure the Young's modulus with high accuracy. It is to provide an exciter for measuring Young's modulus of wood such as veneer.

Further, according to the present invention, even when the second moving body is in contact with a piece of wood such as a veneer, it freely moves in a direction away from the piece of wood and satisfactorily receives longitudinal vibrations from the piece of wood such as a veneer. An object of the present invention is to provide a geophone for measuring Young's modulus of wood such as veneer capable of measuring the modulus with high accuracy.

A further object of the present invention is to provide a Young's modulus measuring device for wood such as veneer that can efficiently and highly accurately measure the Young's modulus of wood such as veneer.

[0009]

According to a first aspect of the present invention, a first moving body which reciprocates toward a wooden piece such as a veneer in a state of being in contact with the wooden piece such as a veneer is provided on the first moving body. The Young's modulus of wood such as veneer is measured by the first acceleration detector that detects the acceleration during reciprocating movement and the actuating member that applies a force to the first moving body in the direction toward the wood such as veneer. It is characterized in that vertical vibration is surely generated during the operation.

According to a sixth aspect of the present invention, the second acceleration detector is provided so as to be capable of reciprocating toward the wood such as the veneer while being in contact with the wood such as the veneer with the second force. The moving body, the second regulating body that regulates the position of the second moving body in the direction toward the lumber such as the veneer, and the second moving body from the second force against the second regulating body in the facing direction. The present invention is characterized by comprising a press-contacting body that applies a large force to press-contact, and reliably receives longitudinal vibration propagating through a single plate to accurately measure Young's modulus.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be described with reference to an embodiment in which the embodiment is applied to a measuring device for measuring the Young's modulus of a single plate.

1 and 1 which are plan explanatory views of the apparatus of the embodiment.
2, which is an enlarged plan explanatory view of the vibration exciter A, and FIG. 3, which is a side explanatory view seen from the alternate long and short dash line XX in FIG.
In FIG. 4 which is an enlarged plan view of the geophone B of FIG. 1, and in FIG. 5 which is a side view of the geophone B seen in the direction of the arrow from the alternate long and short dash line Y-Y in FIG. And a conveyor that supports the single plate 3 as a measurement object whose Young's modulus is measured, and conveys the single plate 3 in the direction of the arrow orthogonal to the fiber direction at a speed of, for example, 20 m / min. Reference numeral 5 denotes a sandwiching conveyor which is arranged above the conveyor 1 and travels at the same speed as the conveyor 1 to sandwich and convey the single plate 3 supported by the conveyor 1.

Reference numeral 6 denotes a diffuse reflection type optical sensor (hereinafter referred to as an optical sensor) for detecting that the veneer 3 has been conveyed to a predetermined position by the conveyor 1. The detection signal from the optical sensor 6 is a controller S described later. Sent to.

Reference numeral 8 is a densitometer for measuring the density of the veneer 3 by, for example, a radiation method. The densitometer 8 measures the densities of the veneer 3 conveyed by the conveyor 1 at a plurality of positions in the conveying direction, and respectively. Send the measured density value to the controller S.

A is a vibration exciter for applying a longitudinal vibration to the veneer 3 and has the following structure.

As shown in FIGS. 2 and 3, reference numeral 7 denotes a shaft which is rotatably provided around a shaft center line indicated by an arrow at a lower end side of a base 9 through a bearing (not shown). A first support plate 11 is fixed to the upper end of the shaft 7.

On the upper surface of the first support plate 11, an abutting portion 13a having a front end surface formed in an arc shape, and a body portion 13 following the abutting portion 13a.
b and the main body 13b, the first moving body 13 composed of a mounting portion 13c fixed by a bolt (not shown) has a minute stroke described later with respect to the first support plate 11 in the left-right direction shown in FIGS. 2 and 3. It is movably provided.

That is, the body portion 13b of the first moving body 13 and the first support plate 11 are provided with through holes 13e and 11a, respectively, and the washer 17 is arranged between the body portion 13b and the first support plate 11. . And these through holes 13e
The screw portion 15 of the hexagon socket head cap screw 15 (hereinafter referred to as the bolt 15) serving as the first restrictor with respect to 11a and the washer 17.
Insert the nut 19 by tightening the nut 19 as described later. At this time, the through hole 13 provided in the first moving body 13
The diameter of e is larger than the diameter of the bolt 15 by, for example, about 0.5 mm, and the diameters of the through hole 11a and the washer 17 provided in the first support plate 11 are made substantially equal to the diameter of the bolt 15. .

A nut 19 is mounted on the tip side of the threaded portion 15c of the bolt 15 protruding downward from the first support plate 11, and the lower end surface 15b of the head portion 15a of the bolt 15 and the upper surface 13d of the body portion 13b. The distance between and is, for example, 0.2 mm
The nuts 19 are tightened and attached by positioning so as to be in a certain degree. As a result, the first moving body 13 can reciprocate on the washer 17 in the left-right direction with respect to the bolt 15 in FIG.

A first acceleration detector 14 is fixed to a mounting portion 13c of the first moving body 13, and the first acceleration detector 14 outputs an acceleration detection signal detected when the first moving body 13 is moving by a code 14a. To a controller S equipped with a monitor device (not shown) for displaying the longitudinal vibration waveform.

A first support plate 11 located on the right rear side of the first moving body 13 shown in FIG. 3 holds a hitting body 21 which constitutes a part of an actuating member (to be described later) for applying a longitudinal vibration to the first moving body 13. A long holding table 23 is provided above and below.

As shown in FIG. 3, a substantially middle portion of an arm portion 21a extending vertically is rotatably supported on the holding table 23, and a striking portion 21b extending left and right is provided at a lower end portion of the arm portion 21a. A hitting body 21 is provided.

That is, an enlarged plan view of the vibration exciter A of FIG. 1 is shown by a solid line in FIG. 2 and a side view of FIG. 2 which is a side view taken from the alternate long and short dash line XX in FIG. As shown in,
The shaft 2 is provided on the back surface of the arm 21a in the substantially vertical center thereof.
5 is fixed, and the shaft 25 is rotatably supported by the holding table 23 via a bearing (not shown).

The striking portion 21b of the striking body 21 and the first moving body 1
A female screw (not shown) is horizontally attached to the mounting portion 13c of No. 3
Are formed, and bolts 27a and 29 are respectively formed on these female threads.
a part of the threaded portion is screwed into nuts 27b and 29b
Fixed by.

Further, both ends of a stretched tension coil spring (hereinafter referred to as a tension spring) 31 are hooked and attached to the threaded portions of the bolts 27a and 29a.

On the other hand, a bearing 33 as a cam follower is rotatably attached to the upper end portion of the arm portion 21a by fixing a bolt 35 to be inserted with a nut 37.

A motor 39 is fixedly mounted on the first support plate 11 at an upper portion of the holding table 23 opposite to the striking body 21, and a shaft 41 of the motor 35 is provided on the holding table 23. A bearing (not shown) is inserted to project to the impacting body 21 side.

A cam 43 having two protrusions 43a having an arcuate peripheral surface shown in FIG. 3 is attached to the tip of the shaft 41, and when the motor 39 rotates the shaft 41 in the arrow direction, The striking body 21 is reciprocally rotated by the intermittent contact of the protrusion 43a with the bearing 33 as described later.

The capacity of the motor 39 is such that the cam 43 resists the tensile force of the tension spring 31 when the projection 43a is brought into contact with the bearing 33 by the rotation of the cam 43 caused by the rotation of the motor 39, as will be described later. Choose to be able to keep spinning.

On the other hand, as shown in FIG. 3, a flat plate-like joint 45 protruding downward is fixed to the lower surface of the first support plate 11,
The joint 45 is also pin-connected to the tip of a piston rod 49 of an air cylinder 47 whose end is pin-connected to a mounting portion (not shown) provided at a position apart from the first support plate 11. As a result, the piston rod 49 is moved back and forth by the operation of the air cylinder 47, whereby the first support plate 11 is reciprocally rotated about the axis center line of the shaft 7 as shown by the arrow in FIG.

As for the pressure of the compressed air supplied to the air cylinder 47, the force of the air cylinder 47 causes the first support plate 11 to rotate clockwise as shown in FIG.
Longitudinal vibration is good because the striking portion 21b collides with the first moving body 13 by appropriately changing the state in which the contact portion 13a of the first moving body 13 is in contact with the edge of the conveyed veneer 3 on the mouth end side. Then, whether or not it has been propagated to the single plate 3 is confirmed and set by a monitor device.

FIG. 1B, which is an explanatory plan view of the apparatus of the embodiment, is a geophone which is arranged opposite to the exciter A and which receives the longitudinal vibration applied to the single plate 3, and is constructed as follows. ing.

As shown in FIG. 4 which is an enlarged plan view of the geophone B of FIG. 1 and FIG. 5 which is a side view of the vibration isolator B as seen in the direction of the arrow from the alternate long and short dash line Y--Y in FIG. A lower end side of 53 is a shaft provided rotatably around a shaft center line indicated by an arrow via a bearing (not shown), and a second support plate 55 is fixed to an upper part of the shaft 51.

A second moving body 57 is provided on the upper surface of the second support plate 55.
Is provided so as to be movable in the left-right direction in FIG. 4 with respect to the second support plate 55. The second moving body 57 is the first moving body 13
However, in order to reduce the mass, for example, a polyamide resin material (a concrete product name is MC nylon manufactured by Nippon Polypenco Co., Ltd.) is used to form an abutting portion 57a having an arcuate tip side, and Continuing body portion 57b and body portion 57b
A mounting portion 57c fixed by a bolt (not shown) is integrally formed therewith.

That is, as shown in FIG. 5, which is a side view for explaining the direction of the arrow from the alternate long and short dash line Y--Y of FIG.
And the second support plate 55 are provided with through holes 57e and 55a, respectively, and a washer 61 is disposed between the main body 57b and the second support plate 55. The threaded portion 59c of the bolt 59) is inserted into the through holes 57e and 55a and the washer 61. At this time, like the first moving body, the diameter of the through hole 57e provided in the second moving body 57 is smaller than the diameter of the bolt 59 by, for example, 0.5.
a large hole about 5 mm, and the through hole 5 provided in the second support plate 55.
The diameters of the holes 5a and the washer 61 are made substantially equal to the diameter of the bolt 59.

Further, the nut 63 is attached to the tip end side of the screw portion 59c of the bolt 59 protruding downward from the second support plate 55, and the lower end surface 59b of the head portion 59a of the bolt 59 and the upper surface 57d of the main body portion 57b are attached. The interval is, for example, 0.2 m
Position it so that it is about m, and tighten and attach the nut 63. As a result, the second moving body 57 can reciprocate on the washer 61 in the left-right direction in FIG. 4, for example, within a range of about 0.5 mm.

A second acceleration detector 58 having a cord 58a for propagating a signal to the controller S is fixed to the upper portion of the mounting portion 57c of the second moving body 57, and left and right are mounted to the lower portion of the mounting portion 57c. A female screw (not shown) is formed in the direction, and the ring-shaped member 65 having an outer diameter slightly smaller than the inner diameter of a compression coil spring 79 (hereinafter referred to as a compression spring) described later is attached to the bolt 6
7 is fixed by screwing the female screw bolt 67 of the mounting portion 57c.

To the left of the second moving body 57 is L in FIG.
A spring mount 69 having a spring-shaped mounting portion 69a that looks like a letter and having a long hole 69b penetrating in the thickness direction (vertical direction in FIG. 5) continuously in the left-right direction is inserted into the long hole 69b. The bolts 71 and 73 are fixed by screwing them into two female screws (not shown) formed on the upper surface of the second support plate 55.

A hole (not shown) penetrating in the left-right direction in FIG. 4 is formed in the spring mounting portion 69a, and the bolt 75 inserted in the hole is fixed with a nut 77.

Further, between the second moving body 57 and the spring mount 69, a compression spring 79 having both ends mounted between the ring-shaped member 65 and the head of the bolt 75 is mounted. At this time, the force with which the second moving body 57 is pressed against the bolt 59 by the compression spring 79 moves the spring mount 69 in a direction of moving toward or away from the second moving body 57 with the bolts 71 and 73 loosened. , When the desired force is reached, bolt 71.7
3 is screwed in again and the second moving body 57 is fixed to adjust and set.

As a result of the above setting, the second position for the bolt 59
As for the position of the moving body 57, as shown in FIG. 6 which is an explanatory view in which the location of the second moving body 57 is enlarged in FIG. 4 and the head 59a of the bolt 59 is omitted, with respect to the left side of the screw portion 59c. The left side of the through hole 57e provided in the second moving body 57 is the position in which the second movable body 57 is in pressure contact.

On the other hand, as shown in FIG. 5, a flat plate-like joint 81 protruding downward is fixed to the lower surface of the second support plate 55,
The tip end of the piston rod 85 of the air cylinder 83 whose end portion is pin-connected to a mounting portion (not shown) provided at a position apart from the second support plate 55 is also pin-connected to the joint 81.

As a result, when the piston rod 85 is moved back and forth by the operation of the air cylinder 83, the second support plate 55
Is reciprocally rotated about a shaft 51 indicated by an arrow in FIG.

Further, the operation of the air cylinder 83 causes the second
As shown in FIG. 1, the support plate 55 is rotated counterclockwise about the shaft 51, and the abutment portion 57a of the second moving body 57 is attached to the edge of the single plate 3 that is conveyed as will be described later. When the second moving body 57 receives a force pushed back from the veneer 3 when abutting against the air cylinder 83, the position of the second moving body 57 with respect to the bolt 59 is maintained in the state shown in FIG. Adjust the pressure of compressed air supplied to.

Further, the controller S controls the operation of each member based on various propagated signals in the following manner, and also carries out arithmetic processing for obtaining Young's modulus. A value of the length of the veneer 3 in the direction orthogonal to the conveying direction is previously input to the controller S.

(1). The controller S receives the detection signal from the optical sensor 6 when the lower end of the single plate 3 conveyed by the conveyor 1 in the conveyance direction reaches the position of the optical sensor 6 and receives the detection signal from the optical sensor 6.
The piston rods 49 of the air cylinders 47 and 83 are brought into contact with the first moving body 13 and the second moving body 57 at the edges of both the wood mouths, which are slightly higher than the lower end of the piston.
・ Output the operation signal to move 85 forward.

When the end of the veneer 3 on the upstream side in the transport direction passes the position of the optical sensor 6 and the signal from the optical sensor 6 transits to non-detection, the controller S moves to the upper side of the veneer 3. The air cylinders 47 and 83 are moved back at the timing immediately before the end passes through the first moving body 13 and the second moving body 57 which are in contact with the edges of both veneers of the veneer 3 to move the piston rods 49 and 85. A signal for the backward movement is output to separate the first moving body 13 and the second moving body 57 from the veneer 3.

(2). The controller S is the striking part 2 of the striking body 21.
When 1b collides with the first moving body 13, the timing at which the acceleration signal from the first acceleration detector 14 is input and the longitudinal vibration due to the collision are propagated through the single plate 3 as described later. The propagation time of the vertical vibration in the single plate 3 is measured based on the timing at which the acceleration signal emitted from the second acceleration detector 58 is input. Moreover, the measurement of the propagation time is performed at a plurality of points on the single plate 3, and the optical sensor 6
When the end of the veneer 3 on the upper hand side in the transport direction passes through the position, and the signal from the optical sensor 6 transits to non-detection, the longitudinal vibration of one veneer 3 from each propagation time at the plurality of points. The average propagation time T is calculated.

(3). The controller S determines the average propagation speed v of longitudinal vibration in the veneer 3 based on the value of the length L of the veneer 3 which is input in advance in the direction orthogonal to the transport direction and the average propagation time T.
Calculate 1

(4). The controller S calculates an average density ρ1 from a plurality of density values measured by the densitometer 8 at a plurality of points on one veneer 3 and calculates the average density ρ1 and the above (3).
The average propagation speed v1 obtained by
× V × V (however, E: Young's modulus, ρ: object density, V:
The average Young's modulus E1 of the veneer 3 is calculated by fitting the inside of the object to the speed at which longitudinal vibration is transmitted.

(5). The controller S displays the calculated average Young's modulus E1 on the screen of the monitor device.

Next, the Young's modulus measuring operation of the veneer 3 will be described. The initial state of the apparatus is set as follows.

That is, the piston rods 49, 85 of both air cylinders 47, 83 are retracted to move the first support plate 11 from the state shown by the solid line in FIG. By rotating the second support plate 55 clockwise about the shaft 51, respectively, the first movable body 13 provided on the first support plate 11 and the second movable body 57 provided on the second support plate 55 are shown in FIG.
Are rotated to the positions indicated by broken lines and are made to stand by at the positions separated from the conveyor 1.

Further, the motor 39 is constantly driven to drive the cam 43.
Keep rotating at all times. As a result, the protrusion 43a is intermittently brought into contact with the bearing 33 by the cam 43 rotating in the direction of the arrow.

At this time, when the bearing 33 and the protruding portion 43a are not in contact with each other, the striking body 21 and the first moving body 13 have the tension spring 3
1, the forces in the directions approaching each other in FIG. 3 are received,
The striking portion 21b and the mounting portion 13c are in contact with each other. At this stage, the bolts 15 in place on the first support plate 11
As for the position of the first moving body 13 with respect to, as shown in FIG. 7, which is an enlarged plan view of the position of the first moving body in FIG. FIG. 8 is an enlarged plan explanatory view of a portion of the first moving body in FIG. 2 in which the left side portion of the inner surface of 13e is in contact with the left side portion of the screw portion 15c of the bolt 15, with the head of the bolt omitted. As shown, the right side portion of the inner surface of the through hole 13e of the first moving body 13 is the bolt 1
It is uncertain whether it is in contact with the right side portion of the screw portion 15c of No. 5 or between both positions.

The protruding portion 4 of the cam 43 rotating from this state
When 3a abuts on the bearing 33, the bearing 33 is pushed to the left by sliding contact with the arcuate circumferential surface of the protrusion 43a, and the impacting body 21 is rotated counterclockwise about the shaft 25 as shown in FIG. It rotates around to rotate the striking part 21b to the right.

The rotation of the impacting body 21 causes the first moving body 1 to move.
3 also receives the tensile force of the tension spring 31, but if the position of the first moving body 13 with respect to the bolt 15 is in the state shown in FIG.
The movement of the first moving body 13 is blocked by the screw portion 15c. Similarly, when the position of the first moving body 13 is in the state shown in FIG. 8 or an intermediate position between the two positions, the first moving body 13 is moved to the right by the tensile force of the tension spring 31, and FIG. As shown in, the left side portion of the inner surface of the through hole 13e of the first moving body 13 comes into contact with the left side portion of the screw portion 15c of the bolt 15 to prevent the movement thereof.

Therefore, when the projecting portion 43a comes into contact with the bearing 33 and the striking body 21 is rotated counterclockwise, the position of the first moving body 13 with respect to the bolt 15 is always in the state shown in FIG. Therefore, the first moving body 13 does not move to the right.

On the other hand, since the cam 43 continues to rotate while stretching the tension spring 31 against the tensile force of the tension spring 31, the striking body 21 further rotates counterclockwise, and as a result, it strikes the mounting portion 13c. There is a space between the body 21b.

When the protruding portion 43a is separated from the bearing 33 by the cam 43 continuing to rotate further, the force acting on the impacting body 21 is only the tensile force of the stretched tension spring 31, and this tensile force causes the impacting body 21 to move. As shown in FIG. 3, 21 abruptly rotates clockwise so that the striking portion 21b collides with the mounting portion 13c of the first moving body 13. As a result, the first moving body 13 in the position of FIG. 7 receives a force in the left direction by the striking portion 21b, and suddenly moves to the left in the position shown in FIG. 8 with a width of about 0.5 mm. Become.

After the first moving body 13 suddenly moves due to the collision, the abutting state between the striking portion 21b and the mounting portion 13c is maintained by the tensile force of the tension spring 31. The position of the moving body 13 is not constant as described above.

From this state, when the projection 43a on the opposite side of the cam 43 is then contacted with the bearing 33 and then separated, the same operation as when the projection 43a is first contacted is repeated. After the position of the first moving body 13 becomes the state shown in FIG. 7, until the striking portion 21b collides with the mounting portion 13c of the first moving body 13 and the first moving body 13 becomes the state shown in FIG. The same operation is repeated by rapidly moving the cam 43 and continuing the rotation. The rotation speed of the motor 39 is set so that the cam 43 rotates 5 times in 1 second, for example.

The Young's modulus of the veneer 3 is measured in the following manner by the device in which the initial state is set as described above.

As shown in FIG. 1, a single plate 3 is produced by the conveyor 1.
Are conveyed in the direction of the arrow orthogonal to the fiber direction. The density of the transported veneer 3 is measured when the veneer 3 first passes through the location of the densitometer 8. The density measurement value obtained by the densitometer 8 is sent to the controller S.

Next, the lower end of the single plate 3 is the optical sensor 6.
When it is detected by, the controller S, which has received the detection signal from the optical sensor 6, causes the piston rods 49, 85 of the air cylinders 47, 83 to move forward to move the first moving body 1
3 in the clockwise direction about the axis 7 and the second support plate 5
The 5 is rotated counterclockwise about the shaft 51 and brought into contact with the edges of both veneers on the both sides of the veneer 3 which are slightly above the lower side in the transport direction.

The first moving body 13 contacting the veneer 3 vibrates intermittently due to the collision of the striking part 21b with the mounting part 13c thereof as described above, and the longitudinal vibration is generated in the veneer 3. Propagate to. Then, the vibration is received by the vertical vibration second moving body 57 propagated to the single plate 3.

In the propagation of this longitudinal vibration, the controller S
Each time the striking part 21b of the striking body 21 collides with the first moving body 13, the timing at which the signal emitted from the first acceleration detector 14 is received at the time of the collision, and the longitudinal vibration of the collision is a single plate as described later. The propagation time of the longitudinal vibration in the veneer 3 is measured based on the timing of receiving the signal emitted from the second acceleration detector 58 when the veneer 3 is transmitted to the second moving body 57 via the third vehicular moving body 57, and the veneer 3 is conveyed. When the end portion on the hand side in the direction passes through the location of the optical sensor 6, the average propagation time T of the veneer 3 is calculated from the respective propagation times measured at a plurality of points of the veneer 3, and the average propagation time T is input in advance. The average propagation speed v1 of the longitudinal vibration in the veneer 3 depending on the value of the length of the veneer 3 in the conveying orthogonal direction
Is calculated.

The controller S calculates the average density ρ1 based on a plurality of density measurement values measured by the densitometer 8, and calculates the average Young's modulus E1 of the veneer 3 from the average propagation speed v1 and the average density ρ1. Display on the monitor screen. In addition, in the above-mentioned setting, in the conveyance direction of the veneer 3 with respect to the veneer 3, about 33
Propagation time is obtained at points at every mm interval.

In the apparatus of the above embodiment, the first acceleration detector 1
By bringing the first moving body 13 provided with 4 into contact with the single plate 3, the following effects are obtained.

That is, as shown by an arrow in FIG. 9 which is an explanatory view of the comparative example, a vibrating body 93 for applying longitudinal vibration to the single plate 91 along the conveying direction of the single plate 91 and an acceleration detector 95 are provided. When the Young's modulus is measured by separately arranging the vertical vibration detection body 97 which continues to be in contact with the single plate 91 and the side body separately, there is the following problem.

For example, if the veneer 91 has a crack 91a, the longitudinal vibration applied to the veneer 91 by the vibrating body 93 will cause a crack 9a.
The length of the single plate 91, which is not propagated at the position of 1a and is propagated to the longitudinal vibration detection body 97, is longer than that in the case where there is no crack 91a. Moreover, since the shape of the crack 91a is not constant, the time until the vertical vibration is propagated to the vertical vibration detector 97 is different. As a result, the propagation speed v1 becomes smaller than the original value, and an accurate Young's modulus cannot be obtained.

On the other hand, in the apparatus of the above embodiment, the single plate 3
Even if there is a crack in the striking part, the striking part 21b is collided with the first moving body 13 to give longitudinal vibration to the veneer 3 and at the same time, the first acceleration detector 14 detects the striking part of the striking part 21b. It is possible to accurately obtain the value of the propagation speed v1,
Young's modulus can be measured more accurately.

The first moving body 13 for the bolt 15
8 is in the state shown in FIG.
Even if collides with the first moving body 13, the first moving body 13 is prevented from moving to the left by the screw portion 15c, so that the vertical vibration is hardly propagated from the first moving body 13 to the veneer 3. It becomes difficult to measure the Young's modulus.

On the other hand, in the apparatus of the above embodiment, the first moving body 13 is movable with respect to the bolt 15 within a range of about 0.5 mm, and the striking body 21 is rotatable about the shaft 25. Since the two are connected by the tension spring 31, the striking portion 21b is moved by the rotation of the cam 43.
As described above, the position of the first moving body 13 with respect to the bolt 15 is in the state shown in FIG. As a result, the first moving body 13 can be rapidly moved to the left with a width of approximately 0.5 mm after the collision, vertical vibration can be reliably transmitted to the single plate 3, and the Young's modulus can be accurately measured. can do.

Further, instead of the tension spring 31 in the above embodiment, one end is fixed to the first support plate 11 and the other end is fixed in order to bring the position of the first moving body 13 with respect to the bolt 15 into the state shown in FIG. In addition to the one tension spring fixed to the first moving body 13, the striking portion 21b of the striking body 21 is attached to the first moving body 13 separately.
A tension spring having one end fixed to the first support plate 11 and the other end fixed to the striking portion 21b may be provided in order to collide with.

However, with the construction in which the first moving body 13 and the striking body 21 are connected by the tension springs 31 as described above, the tension springs 31 are moved before the striking portion 21b collides with the first moving body 13. As described above, the force is applied to bring the position of the first moving body 13 with respect to the bolt 15 into the state shown in FIG. 7, and the force is applied to cause the striking portion 21b to collide with the first moving body 13. Can be used for both.

The second moving body 57 is movable with respect to the bolt 59 within a range of, for example, about 0.5 mm, and the through hole 57e of the second moving body 57 is provided with the bolt 59 by the compression spring 79 in the state shown in FIG. Since it is configured to be pressed against the screw portion 59c of the above, the following effects can be obtained.

As described above, the second moving member 13 comes into contact with the single plate 3 by the longitudinal vibration generated when the first moving body 13 collides with the single plate 3.
Even if the contact portion 57a of the moving body 57 moves to the left side in FIG. 6, the first moving body 13 should return to the left side in FIG. 6 by the force of the compression spring 79 until the first moving body 13 collides with the single plate 3. You can

As a result, when the longitudinal vibration of the veneer 3 is propagated, the position of the second moving body 57 with respect to the bolt 59 is always as shown in FIG.
In the state shown in (3), it is possible to freely move to the left, and it is possible to properly receive longitudinal vibration.

Modification example (1). As the density of the veneer 3, an average density value that is estimated in advance depending on the tree species may be input to the controller S without using a densitometer.

(2). The first moving body 13 and the second moving body 57 may each be provided with a bearing and configured to be driven to rotate as the single plate 3 is transported.

(3). The Young's modulus E1 thus obtained is not displayed on the monitor screen, but the Young's modulus E1 measured by a printer of an ink jet system for ejecting ink onto the single plate 3 whose Young's modulus was measured or a thermal transfer system for thermally transferring the ink is used. It may be printed directly.

(4). In a state where the wood such as a veneer is stopped without running, the first moving body 13 and the second moving body 57 are brought into contact with the wood while facing each other, and the Young's modulus is measured. Is also good.

(5). A crank mechanism may be used as a member for causing the first moving body 13 to collide with the single plate 3.

(6). An electromagnetic solenoid device may be used as the actuating member that strikes the first moving body 13. That is, the built-in electromagnet is excited and driven by a pulse of a predetermined duty, and the built-in compression spring urges the plunger biased away from the first moving body 13 in the opposite direction to magnetically drive the plunger in the opposite direction. Is struck, and vertical vibration is applied to the veneer 3.

(7). Although the above description has been described by taking the case of measuring the Young's modulus of the veneer 3 as an example, the present invention can be applied to the case of measuring the Young's modulus of wood such as a plate and a pillar.

[0087]

The vibration exciter according to the present invention provides that the first moving body gives the longitudinal vibration to the wood such as the veneer and the first moving body gives the longitudinal vibration at the same time. The Young's modulus can be measured with high accuracy by detecting and accurately obtaining the propagation speed of longitudinal vibration in wood such as a veneer. Further, the vibration receiving device of the present invention can freely move in a direction away from the wood even when the second moving body is in contact with the wood such as the wood, and can favorably receive the longitudinal vibration from the wood such as the wood. The Young's modulus can be measured with high accuracy. Furthermore, the Young's modulus measuring device of the present invention can efficiently and highly accurately measure the Young's modulus of wood such as a veneer in a conveyed state.

[Brief description of drawings]

FIG. 1 is an explanatory plan view of an apparatus according to an embodiment.

FIG. 2 is an enlarged plan view of the vibration exciter A shown in FIG.

3 is a side view for explaining the direction of the arrow from the alternate long and short dash line XX in FIG.

FIG. 4 is an enlarged plan view of the geophone B of FIG.

5 is a side view for explaining the direction of the arrow from the alternate long and short dash line Y-Y in FIG.

FIG. 6 is an enlarged plan view of a portion of the second moving body in FIG. 4 with the bolt head omitted.

FIG. 7 is an enlarged plan view of a portion of the first moving body in FIG. 2 with the bolt head omitted.

FIG. 8 is an enlarged plan view of a portion of the first moving body in FIG. 2 with the head of the bolt omitted.

FIG. 9 is an explanatory diagram of a comparative example.

[Explanation of symbols]

3-Veneer such as veneer, 11-first support plate, 13
-First moving body, 13c-Mounting part, 14-First acceleration detector, 21-Impacting body forming a part of actuating member, 21b-
Impact part, 43-cam, 55-second support plate, 57-second moving body

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tetsuya Nakao             2962-7 Nishikawatsu, Matsue City, Shimane Prefecture (72) Inventor Yellow wave             Shimane Prefecture Matsue City Mochimachi 199-4 (72) Inventor Yuichi Suzuki             130, Kajita-cho, Obu City, Aichi Prefecture Stock             Company name Minami Factory (72) Inventor Teruyuki Matsubara             130, Kajita-cho, Obu City, Aichi Prefecture Stock             Company name Minami Factory F-term (reference) 2G061 AA13 AB04 AB05 BA07 CA13                       CB02 DA01 EA10 EB03 EC02

Claims (8)

[Claims] 1. A first moving body that reciprocates toward wood such as veneer veneer while contacting the wood such as veneer veneer, and the first moving body.
A first unit provided on a moving body to detect acceleration during reciprocating movement
An exciter for measuring Young's modulus of wood such as veneer veneer comprising an acceleration detector and an actuating member for applying a force to the first moving body in the direction toward the wood such as veneer veneer. 2. A first moving body, which reciprocates toward a piece of wood such as veneer veneer, and is provided with a first acceleration detector, is moved relative to a first regulator in a direction away from the piece of wood such as veneer veneer. An operation of providing a force greater than the first force in the direction opposite to the first force on the first moving body in a state of being pressed against the first veneer veneer wood in a state of being pressed by the first force. Exciter for measuring Young's modulus of wood such as veneer veneer with members. 3. A first support base provided with a first moving body provided with a first acceleration detector; a position where the first moving body comes into contact with wood such as veneer veneer; A first reciprocating member capable of reciprocating between the veneer veneer and the like and a position distant from the wood, and the first moving body is moved by the reciprocating movement of the first support table. When in the abutting position,
The first support is capable of reciprocating toward the wood such as veneer veneer with respect to the first support base, and is in a direction away from the wood such as veneer veneer.
A veneer veneer or the like provided with an actuating member which is provided in a state of being pressed against the restricting body by the first force and which is in the direction opposite to the first force and intermittently applies a force larger than the first force to the first moving body Exciter for measuring Young's modulus of wood. 4. A first support base provided with a first moving body provided with a first acceleration detector; a position where the first moving body comes into contact with wood such as veneer veneer; A first reciprocating member capable of reciprocating between a position distant from the wood;
When the first moving body is in the position where the first moving body abuts by the reciprocating movement of the first supporting base, the first moving body can reciprocate with respect to the first supporting base toward wood such as veneer veneer, In addition, the first support is provided so as to be pressed against the first restricting body in the direction away from the wood such as the veneer veneer, and the first support is provided with a force larger than the first force in the opposite direction to the first force. (1) A vibrating machine for measuring Young's modulus of wood such as veneer veneer provided with an operating member that is intermittently applied to a moving body. 5. A first support base provided with a first moving body provided with a first acceleration detector; a position where the first moving body comes into contact with wood such as veneer veneer; When the first reciprocating member that moves reciprocally between the position away from the wood and the first moving body is at the position where the first moving body abuts by the reciprocating movement of the first support base. A first restricting body which is reciprocally movable toward and away from wood such as veneer veneer, and which restricts the position of the first moving body in the direction away from and away from wood such as veneer veneer; A collision member that reciprocates between a position that abuts on the moving body and a position that is separated from the first moving body, a tension spring that is stretched over the first moving body and the collision member, and the tension spring is stretched over the tension spring. In this state, the collision member is moved to a position away from the first moving body, and then the collision member is released. Young's modulus measuring vibrator of veneer or the like timber provided with a member. 6. A second moving body having a second acceleration detector, which is reciprocally movable toward the wood such as the veneer veneer in a state of being in contact with the wood such as the veneer veneer with a second force. A second regulating body that regulates the position of the moving body in the direction toward the wood such as veneer veneer, and a second moving body in which a force larger than the second force is applied to the second regulating body in the facing direction. A vibration receiver for measuring Young's modulus of wood such as veneer veneer, which is provided with a pressure contact body for pressure contact. 7. A second support base provided with a second moving body provided with a second acceleration detector, the second support base, and a position at which the second moving body contacts wood such as veneer veneer. A second reciprocating member capable of reciprocating between a position away from the wood and the second moving member at a position where the second moving member abuts by the reciprocating motion of the second support base. Occasionally, the second support can reciprocate toward the wood such as veneer veneer, and is second with respect to the second restrictor in the direction toward the wood such as veneer veneer.
And the second reciprocating member moves the second support base to press the wood such as the veneer veneer when the second moving body contacts the wood such as the veneer veneer. A vibration receiver for measuring the Young's modulus of wood such as veneer veneer configured with a small force due to the second force. 8. A Young's modulus measuring device for wood such as veneer veneer which is a combination of the Young's modulus measuring vibrator of any one of claims 1 to 5 and the Young's modulus measuring vibrator of claim 6 or 7.