JPH09277203A - Material sending apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the adjusting work of the position of the core of material wood with high accuracy by providing a centering means revolving a grasping part within a predetermined range by the relation between the cam and cam floor respectively attached to one base stand. SOLUTION: A gasping means 65 is attached to the leading end of a base stand 51 so as to be made rotatable by 90 deg. by the rotary drive means 101 attached to the base stand 51. When the second sawing is executed, the core of material wood is confirmed and, if the core of material wood is shifted, the work adjusting the core of material wood is executed by the respective centering means 131 of the base stand 51. That is, grasping means 65, 65 are revolved in appropriate directions by proper quantities by the centering means 131 to adjust the core of material wood.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a lumber feeding apparatus for sawing raw wood to obtain timber and the like for gripping the raw wood and sending it toward a twin band saw.

[0002]

2. Description of the Related Art As a material feeding apparatus in a conventional lumber making apparatus, for example, Japanese Patent Laid-Open No. 7-124901 and Japanese Patent Publication No.
-35043, JP-A-7-132501,
There is one shown in Japanese Examined Patent Publication No. 7-35042. The material feeding device shown in them basically performs a desired sawing by advancing and retracting with respect to the twin band saw in a state of gripping the raw wood from both sides. Then, in such a material feeding device, it is necessary to rotate the raw wood by 90 ° while holding the raw wood from both sides and to adjust the position of the core.

For example, in the case of the material feeding device disclosed in Japanese Examined Patent Publication No. 7-35043, gripping portions as shown in FIG. 14 are provided on both sides, and the pair of gripping portions grip the raw wood from both sides. It has become. Hereinafter, description will be made with reference to FIG. First, a base 201 is arranged on the material feeding vehicle, and the base 201 is adapted to reciprocate on the material feeding vehicle by a predetermined stroke. Further, there is a first drive motor 203, and the output shaft 2 of the first drive motor 203
A gear 205 is fixed to 03a. This gear 20
5 has another gear 207 meshed with it, and this gear 207
A cylinder shaft 209 is fixed to the.

A grip portion 211 is attached to the tip of the cylindrical shaft 209 (the left end in FIG. 14). This gripping member 2
11 is provided with a grip claw 211a on the tip surface. And
By rotating the first drive motor 203, the grip portion 211 is moved through the gears 205 and 207 and the cylinder shaft 209.
Can be rotated by 90 degrees. Further, a second drive motor 213 is arranged separately from the first drive motor 203, and the second drive motor 21
A center shaft 215 is fixed to the third output shaft 213a. The disk 2 is attached to the tip of the center shaft 215 (the left end in FIG. 14).
17 is attached, and an eccentric pin 219 is projectingly provided on the tip end surface of the disk 217.

On the other hand, on the side of the gripping member 211 already described,
Dovetail groove 221 with which the eccentric pin 219 is movably engaged
Are formed. Then, as the second drive motor 213 rotates, the center shaft 215 rotates, which causes the disk 217 to rotate. As the disc 217 rotates, the eccentric pin 219 also moves. At that time, due to the relationship between the eccentric pin 219 and the dovetail groove 221,
The tip of the grip member 211 moves within a predetermined range. It should be noted that the grips having the structure shown in FIG. 14 are arranged on both sides.

According to the above construction, first, the raw wood fed into the material feeding device is gripped by the gripping members 211 of the pair of gripping portions. In that state, the feeding vehicle is run to convey the raw wood toward the twin band saw. Thereby,
The left and right sides of the raw wood will be cut off, resulting in what is called "taiko material." Next, when the material feeding vehicle returns to the original position, the first drive motor 203 shown in FIG. 14 is rotated to rotate the raw wood by 90 °.
The left and right cut-off surfaces are oriented vertically, and the upper and lower uncut surfaces are oriented left-right. Then, at this time, the position of the core of the raw wood is checked by means of, for example, irradiation with laser light, and if the position is deviated, the second drive motor 213 shown in FIG. 14 is driven. The adjustment is performed by moving the tip portion of the grip portion 211 in an appropriate direction by an appropriate amount.

When the core adjusting work is completed, the material feeding vehicle is driven again to convey the raw wood toward the twin band saw. As a result, both the left and right sides of the raw wood are cut off, resulting in the so-called "square wood".

[0008]

According to the above conventional structure, there are the following problems. First, there has been a problem that the entire structure of the grip portion is large and the structure is complicated.
In particular, the configuration is such that the component that protrudes in the direction orthogonal to the axial direction (lateral direction) is large, and this is constrained by the relationship with the span of the twin band saw (the distance between the pair of band saws). However, there was a problem that the span could not be made too small. Another problem is that the accuracy of the adjustment work is low during the work of adjusting the core of the raw wood. That is, in the configuration shown in FIG. 14, the tip end portion of the gripping member 211 is moved within a predetermined range depending on the relationship between the eccentric pin 219 and the dovetail groove 221. There were times when it was not possible to make adjustments.

The present invention has been made on the basis of the above points, and an object thereof is to simplify the structure of the gripping portion and downsize it, and to adjust the position of the core of the raw wood with high accuracy. An object of the present invention is to provide a material feeding device capable of carrying out.

[0010]

In order to achieve the above object, a material feeding device according to the present invention comprises a material feeding carriage arranged so as to be able to advance and retreat in a twin band saw direction along a track, and both ends on the material feeding carriage. A pair of bases respectively arranged on the side and arranged to be capable of advancing and retracting in the twin band saw direction on the material feeding carriage, and a pair of gripping means attached to the tips of the pair of bases and gripping one end of the raw wood, respectively. Rotational drive means respectively attached to the pair of bases for rotating the gripping means by 90 °, and rotations of the gripping means within a predetermined range depending on the relationship between the cam and the cam floor respectively attached to the pair of bases. And centering means. At this time, it is conceivable that the rotation driving means is provided with a stopper means for restricting the rotation of the grip portion by 90 ° by stopping the collision. Further, as the stopper means, the gripping means can be installed in either the left or right direction.
It is conceivable to rotate by 0 ° and regulate by stopping and hitting. It is also conceivable that a pusher means is attached to the tip of the base so that when the gripping means is separated from the log, it is projected toward the log and the gripping means is forcibly separated from the log.

[0011]

That is, in the case of the material feeding device according to the present invention, the centering means having a structure for adjusting the core of the original by rotating the gripping means within a predetermined range depending on the relationship between the cam and the cam floor. Since it is provided, desired centering work can be performed with an extremely simple configuration. In particular, since the gripping means is rotated within a predetermined range depending on the relationship between the cam and the cam floor, the operation becomes smooth and fine adjustment can be performed, and in the end, the centering is performed with high accuracy. It can be carried out. At that time, when the rotation driving means is provided with a stopper means for restricting the rotation of the grip portion by 90 ° by stopping the collision, if the stopper means is used,
It is possible to accurately regulate the rotation amount of 0 °. Further, when the gripping means is rotated by 90 ° in any of the left and right directions as the stopper means so as to be restricted by hitting and stopping, the usability is improved accordingly. Also, attach pusher means to the tip of the base,
When the gripping means is detached from the log, if the gripping means is projected toward the log and the gripping means is forcibly detached from the log, it is possible to prevent the situation where the log is dragged by the gripping means.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. First, with reference to FIG. 1, a schematic configuration of the entire material feeding device according to the present embodiment will be described. First, there is an orbit 1, which is the first orbit 1a on the right side in FIG.
And a second track 1b on the left side in FIG.
The core of this machine (twin band saw, indicated by reference numeral 3 in FIGS. 11 and 12) is arranged between the first track 1a and the second track 1b. The track 1a is composed of a plurality of leg portions 5, a support base 7 supported by the plurality of leg portions 5, a rail 9 laid on the support base 7, and the like. The track 1b is composed of a plurality of leg portions 11, a support base 13 supported by the plurality of leg portions 11, a rail 15 laid on the support base 13, and the like. The configuration of the twin band saw 3 will be described in detail later.

On the first track 1a and the second track 1b, a material feeding carriage 17 is arranged so as to be movable back and forth in the twin band saw 3 direction. The material feeding cart 17 is a cart body 19
And a plurality of wheels 21 attached to the lower surface side of the carriage body 19. The material feeding cart 17
Is driven to travel by the travel drive mechanism 23. The traveling drive mechanism 23 is configured as shown in FIG. First, there is the drive motor 25.
A sprocket 27 is fixed to the output shaft of the. or,
The sprocket 29, 31, 3, 3 is attached to the support base 7 of the track 1a.
3 is attached to the sprocket 27, 2
A chain 35 is wound around 9, 31, 33.

On the other hand, a fixing member 37 is attached to the carriage main body 19 side of the material feeding carriage 17. Feeding cart 19
Is attached to the chain 35 via the fixing member 37. Therefore, by rotating the drive motor 25 in an appropriate direction, the sprockets 27, 2
The material feeding carriage 17 moves in the left-right direction in FIG. 1 along the first track 1a and the second track 1b via the 9, 31, 33, the chain 35, and the fixing member 37.

Another sprocket 39 is fixed to the output shaft of the drive motor 25.
Another sprocket 41 is installed at a position separated from 9. A chain 43 is wound around these sprockets 39 and 41. Another sprocket 45 is coaxially attached to the sprocket 41, and another sprocket 47 is installed at a position separated from the sprocket 45. And these sprockets 4
A chain 49 is wound around the wires 5 and 47. Therefore, when the drive motor 25 rotates, the rotation is transmitted to the sprocket 47 via the sprocket 39, the chain 43, the sprocket 41, the sprocket 45, and the chain 49, and the rotation is transmitted to the drive source of another mechanism not shown. Has become.

Bases 51 and 53 are installed on the material feeding carriage 17 at opposite positions, respectively. Further, between the pair of bases 51 and 53, supporting members 57 and 59 for supporting the raw wood 55 (shown in FIG. 2) from below are attached to the material feeding carriage 17 so as to be retractable. The support members 57 and 59 are provided with cylinder mechanisms 61 and 63, respectively, and the support members 57 and 59 are driven by driving the cylinder mechanisms 61 and 63 at a predetermined timing.
Is projected and arranged to support the log 55.
Further, the gripping means 65, 6 are provided at the tips of the bases 51, 53.
7 is attached to the raw wood 55 supported by the supporting members 57 and 59 by the gripping means 65 and 67.
To grip. Then, by moving the material feeding cart 17, the raw wood 55 is conveyed in the twin band saw 3 direction to perform a predetermined sawing.

The above is the schematic configuration of the material feeding device according to the present embodiment, and the configuration of each part will be described in detail below. First, the configuration of the base 51 side will be described with reference to FIGS. 3 and 4. The base 51 described above is mounted on the base member 69 fixed on the carriage main body 19 of the material feeding carriage 17 so as to be movable back and forth in the twin band saw 3 direction. That is, between the base 51 and the base member 69,
A guide mechanism 71 called a so-called "linear guide" is inserted. The guide mechanism 71 includes the base member 6
The guide 73 is laid on the upper surface of the base plate 9, and a plurality of sliders 75 mounted on the lower surface of the base 51 and sliding along the guide 73.

A cylinder mechanism 77 is installed behind the base 51 (on the right side in FIG. 3). The cylinder mechanism 77 includes a cylinder 79 and a piston rod housed in the cylinder 79 so as to be retractable. And 81. The base 51 is connected to the piston rod 81. Therefore, by driving the cylinder mechanism 77, the base 51 is advanced and retracted via the piston rod 81.

The cylinder mechanism 77 includes another moving member 8
3, the moving member 83 is also movably mounted along the base member 69 via the guide mechanism 85. The guide mechanism 85 includes a part of the guide 73 of the guide mechanism 71 described above and a slider 87 attached to the lower surface of the moving member 83. A cylinder mechanism 89 is installed behind the moving member 83 (on the right side in FIG. 3). The cylinder mechanism 89 includes a cylinder 91 and the cylinder 91.
And a piston rod 93 that is housed so as to be able to appear and disappear. The moving member 83 is the piston rod 9
It is connected to 3. Then, by driving the cylinder mechanism 89, the moving member 83 is moved back and forth along the base member 69 via the piston rod 93. By moving the moving member 83 back and forth, the cylinder mechanism 77 and the base 5 are moved.
The whole of 1 will move. In this embodiment, the cylinder mechanism 77 causes the base 51 to slide with a predetermined stroke, and when the stroke is insufficient, the cylinder mechanism 89 is made to function.

The gripping means 65 described above is attached to the tip of the base 51, and has a grip portion main body 95, a shaft portion 97 rotatably disposed in the grip portion main body 95, and the shaft portion. It is composed of a grip claw 99 attached to the tip of 97. The shaft portion 97 is rotatably attached by 90 ° by the rotation driving means 101 attached to the base 51. The rotation driving means 101 has the following configuration. First, the shaft portion 103 is provided, and the tip (left end in FIG. 3) of the shaft portion 103 is connected to the shaft portion 97 of the gripping means 65 by the universal joint 105.
Are connected via

As shown in FIG. 7, a pinion gear 107 is fixed to the rear end of the shaft 103 (right end in FIG. 3). A rack gear 109 is arranged behind the pinion gear 107 in FIG. Also, the cylinder mechanism 1
11 is attached to the cylinder mechanism 111
Is composed of a cylinder 113 and a piston rod 115 housed in the cylinder 113 so as to be retractable. A supporting member 119 is connected to the piston rod 115 via a connecting member 117, and the rack gear 109 described above is attached to the supporting member 119. Therefore, by driving the cylinder mechanism 111, the piston rod 115 and the connecting member 1
The rack gear 109 vertically moves via the support member 119 and the support member 119, thereby rotating the pinion gear 107. By the rotation of the pinion gear 107, the shaft portion 10
3. The grip claw 99 is rotated by 90 ° via the universal joint 105 and the shaft 97.

The reason why the grip claw 99 is rotated by 90 ° is as follows. That is, by sawing the raw wood 55 once with the twin band saw 3, it becomes a so-called "taiko material", and by rotating this drum material 90 ° and sawing again with the twin band saw 3, a so-called "square material" is obtained. You will get it. Then, in order to rotate the drum material by 90 °, the grip claw 99 is rotated by 90 °.

The stopper means 12 is provided at a predetermined position of the shaft portion 97.
1 is installed. The stopper means 121 accurately regulates the 90 ° rotation. The stopper means 121 has a structure as shown in FIG. First, a stopper member 123 is fixed to the shaft portion 97, and this stopper member 123 is provided with a projecting portion 123a in the range of 90 °, and both ends of this projecting portion 123a serve as stopper surfaces 123b and 123c. Has become. On the other hand, stop portions 125, 127 are provided on the grip portion main body 95 side, and the stopper surface 1 of the stopper member 123 is provided.
When 23b and 123c collide with the stop portions 125 and 127, the rotation amount of the shaft portion 97 is regulated within the range of 90 °. For example, when the left and right sides of the raw wood 55 are sawn by the twin band saws 3, there is a state as shown in FIG. 8, whereby a drum material can be obtained. Next, when sawing the upper and lower parts of the raw wood 55, FIG.
Rotate 90 degrees clockwise from the state shown in. It is accurately regulated by the stopper surface 123b coming into contact with the stop portion 125. In that state, the upper and lower surfaces of the raw wood 55 are oriented in the left-right direction, and by sawing with the twin band saw 3 in that state, a timber can be obtained. It is to be noted that since the stopper means 121 corrects the 90 ° rotation amount accurately as described above, the cylinder mechanism 111 side, which has already been described, has a stroke capable of providing the 90 ° rotation amount. On the other hand, a slightly larger stroke is set.

The shaft member 103 is supported by a support member 129, as shown in FIG. That is, during the 90 ° rotation operation, the shaft member 103
May be swung, and therefore the support member 1
It is supported by 29. Note that, in FIG. 9, a solid line indicates a state where the shaft member 103 is not swung, and a virtual line indicates a state where the shaft member 103 is swung to the left and right.

Next, the structure of the centering means 131 for adjusting the core of the raw wood 55 by causing the gripping means 65 to perform a swinging motion will be described. As shown in FIGS. 3 and 4, first, there is a cylinder mechanism 133, and this cylinder mechanism 133 is composed of a cylinder 135 and a piston rod 137 accommodated in the cylinder 135 so as to be retractable. A moving member 139 is connected to the piston rod 137. This moving member 139, with respect to the support member 129,
It is movably attached via a guide mechanism 141. The guide mechanism 141 includes a guide 143 attached to the upper surface of the support member 129, and a slider 145 attached to the lower surface of the moving member 139 and moving along the guide 143.

The grip portion main body 95 of the grip portion 65 described above is rotatably connected to the moving member 139. That is, as shown in FIG. 4, a cam groove 147 is formed on the moving member 139 side, while
A cam floor 149 is projectingly provided on the grip portion main body 95 side. The cam floor 149 is movably engaged with the cam groove 147. Further, the grip portion main body 95 includes the shaft portion 15
1 and is rotatably attached to the base 51 side via the shaft 151. Then, by driving the cylinder mechanism 133, the piston rod 13
7 expands, which causes the moving member 139 to move. By the movement of the moving member 139, the cam groove 14
7, via the cam floor 149, the grip portion main body 95 rotates within a range indicated by an imaginary line in FIG. By the rotation of the grip portion main body 95, the grip claw body 99 is also rotated integrally, thereby adjusting the core of the raw wood 55.

Next, the structure of the pusher means 161 will be described. As shown in FIG. 3, the pusher means 161 firstly includes a cylinder mechanism 163. The cylinder mechanism 163 includes the cylinder 165 and the cylinder 1.
65 and a piston rod 167 housed so as to be retractable. A pusher member 169 is connected to the piston rod 167, and the pusher member 169 is attached so as to be movable back and forth in the horizontal direction in FIG. Then, by driving the cylinder mechanism 163, the pusher member 167 is projected through the piston rod 167 to a position indicated by a virtual line in FIG.

The timing for operating the pusher means 161 is as follows. That is, log 55
This is a case where a predetermined sawing is performed on the to remove the grip of the raw wood 55. In this case, by retreating the base 51, the grip claw body 99 is disengaged from the end surface of the log 55, but at that time, since the grip claw body 99 bites into the end surface of the log 55, Log 5 from gripping nail 99
5 may not leave. Therefore, at the same time when the base 51 is retracted, the pusher member 167 is moved forward and brought into contact with the raw wood 55, thereby attempting to prevent the raw wood 55 from being hung by the grip claws 99.

Next, referring to FIGS. 5 and 6, the base 53
The configuration on the side will be described. Since the base 53 side is the same as the base 51 side except for a part of the configuration, the same portions are denoted by the same reference numerals and the description thereof will be omitted. Note that the above-mentioned part of the configuration means the cylinder mechanism 8 on the base 51 side.
9, the structure corresponding to the support member 83, the guide mechanism 85,
It is not on the base 53 side.

The twin band saw 3 is shown in FIG.
1 has a configuration as shown in FIG. First, there is a pair of band saws 171 and 173. Band saw 171
Is a pair of rotating bodies 175 and 177 arranged above and below,
Band saw 179 wound around these rotating bodies 175, 177
And a drive motor 18 for rotationally driving one of the rotating bodies 177.
1 is provided. A pulley 183 is fixed to the output shaft of the drive motor 181, and a pulley 185 is coaxially fixed to the rotating body 177. Pulleys 183, 185
A belt 187 is wound around. Band saw 1
The 73 side also has the same configuration, and the same portions are denoted by the same reference numerals and the description thereof is omitted. The distance between the pair of band saws 171 and 173 is appropriately adjusted and set.

The operation will be described based on the above configuration. First, in the process before the raw wood is introduced into the material feeding device according to this embodiment, the spine and the belly of the raw wood are determined and the centering work is completed. Then, in the positioned state, it is introduced into the material feeding device according to the present embodiment by a conveying means (not shown).

When the raw wood 55 is conveyed onto the material feeding carriage 17 of the material feeding device, the supporting members 57 and 59 are moved to the cylinder mechanism 61,
It projects upwards by 63, thereby supporting the log 55 from below. At the same time, the bases 51 and 53 move toward the log 55, and the grip claws 99 and 99 of the gripping means 65 and 67 grip the log 55 from both sides. In this state, the traveling carriage 17 moves in the twin band saw 3 direction, whereby both sides of the raw wood 55 are sawn. By the sawing, the raw wood 55 becomes a so-called "taiko material".

Next, the traveling carriage 17 returns to its original position.
When the traveling carriage 17 returns, the rotation driving means 101, 101 of the bases 51, 53 are driven, and the gripping means 65,
65, the raw wood 55 gripped by the gripping means 65, 65 is rotated 90 °. That is, the left and right cutting surfaces cut by the first sawing are oriented in the vertical direction, and the upper and lower surfaces not yet saw are oriented in the left and right directions, respectively. In that state, the traveling carriage 17 is caused to travel again in the twin band saw 3 direction. As a result, log 55
The upper and lower surfaces oriented in the left-right direction are sawn, and the raw wood 55 is in the state of square wood.

Further, when the second sawing is carried out, it is judged whether or not the core of the raw wood 55 is displaced. For example, if the core of the raw wood 55 is confirmed by means such as irradiating laser light, and if the core of the raw wood 55 is misaligned, the centering means 131 of the bases 51 and 53 The work of adjusting the core of the log 55 is performed. That is, the centering means 131 rotates the gripping means 65, 65 in an appropriate direction by an appropriate amount, whereby the raw wood 5
The core of No. 5 is adjusted.

When the predetermined sawing is completed, the traveling carriage 17 returns to its original position, and the bases 51 and 53 retract from the raw wood 55 to release the grip of the raw wood 55. At that time, the push claws 99 of the gripping means 66, 66 drive the pushers 161, 161 respectively so that the grip claws 99 are reliably separated from the log 55. That is, in synchronization with the backward movement of the bases 51 and 53, the pusher members 167 and 167 of the pusher means 161 and 161 are projected toward the log 55 and brought into contact with the end surface of the log 55. In this state, if the bases 51 and 53 are retracted, the grasping is surely released without dragging the raw wood 55.

As described above, according to this embodiment, the following effects can be obtained. First, on the feeding device, the raw wood 5
The configuration for performing the centering work of No. 5 has become extremely simple, and the centering can be performed with high accuracy.
That is, the moving member 139 is moved by the cylinder mechanism 133.
This is because the gripping means 66 can be rotated by an appropriate amount in an appropriate direction only by moving the lever back and forth, and thereby centering can be performed. Further, in this case, there is no structural portion that largely protrudes in the direction orthogonal to the axial direction in terms of the configuration, and accordingly, the configuration can be simplified and downsized.
Further, due to the relationship between the cam groove 147 and the cam floor 149, the gripping means 66 is rotated in an appropriate direction by an appropriate amount. At that time, the operation itself is smoothly performed and fine adjustment can be performed. It was As a result, centering can be performed with high accuracy. Also, the gripping means 6
When rotating 5 by 90 °, stopper means 121
Since the amount of rotation can be accurately regulated by the
The 01 side does not require a high degree of accuracy, which allows the design margin to be relaxed. Further, since the pusher means 161 is provided, the grip claw 99
Can be reliably separated from the log 55, and the log 55
It is possible to prevent the occurrence of a situation that drags.

Next, a second embodiment of the present invention will be described with reference to FIG. In the case of this embodiment, the stopper means 1
21 is changing the configuration. That is, the stopper member 191 is fixed to the shaft portion 97,
91 is the stopper surface 191a, 1 at the position of 180 °,
91b is provided. Also, the stopper surfaces 191a, 191
A concave portion 191c is formed at an intermediate position of b, and a pin member 193 is disposed in the concave portion 191c so that the pin member 193 can be engaged with the concave portion 191c. The pin member 193 is driven by the cylinder mechanism 195. The cylinder mechanism 195
Is composed of a cylinder 195a, a piston 195b, pressure oil supply / discharge ports 195c, 195d, and the like.

In this case, the shaft portion 97, that is, the grip means 65 can be rotated by 90 ° in any direction. That is, the pin member 193 is appropriately removed from the recess 191c, the shaft 97 is rotated, and the pin member 193 is rotated by 90 °.
The rotation is regulated by fitting it to c. As described above, since it can be rotated in any direction, the usability is greatly improved.

[0039]

As described in detail above, according to the material feeding device of the present invention, first, the structure for performing the centering operation of the raw wood is extremely simple, and the centering can be performed with high accuracy. It became so. That is, depending on the relationship between the cam and the cam floor, the gripping means is rotated in an appropriate direction by an appropriate amount, and at that time, the operation itself is smoothly performed and fine adjustment can be performed. As a result, centering can be performed with high accuracy. Further, when the stopper means is provided, the amount of rotation can be regulated more accurately, so that high precision is not required for the rotation driving means, whereby the design margin can be relaxed. Further, when the pusher means is provided, the grip portion can be reliably separated from the raw wood, and the occurrence of a situation in which the raw wood is dragged can be prevented in advance.

[Brief description of drawings]

FIG. 1 is a side view showing an overall schematic configuration of a material feeding device according to an embodiment of the present invention.

FIG. 2 is a side view showing an enlarged part II of FIG. 1 showing an embodiment of the present invention.

FIG. 3 is a side view showing the configuration of one of the pair of bases and the vicinity thereof, showing the embodiment of the present invention.

FIG. 4 is a diagram showing an embodiment of the present invention and is a top view showing a configuration of one of the pair of bases and the vicinity thereof.

FIG. 5 is a side view showing the configuration of the other base of the pair of bases and the vicinity thereof, showing the embodiment of the present invention.

FIG. 6 is a diagram showing an embodiment of the present invention and is a top view showing a configuration of the other base of the pair of bases and the vicinity thereof.

7 is a diagram showing an embodiment of the present invention and is a view taken along line VII-V in FIG.
It is II sectional drawing.

FIG. 8 is a view showing an embodiment of the present invention and is a view taken along line VIII- of FIG.
FIG. VIII is a cross-sectional view.

FIG. 9 is a diagram showing an embodiment of the present invention, and is IX-IX in FIG.
It is sectional drawing.

FIG. 10 is a side view showing a configuration of a drive mechanism for causing the material feeding cart to travel, showing an embodiment of the present invention.

FIG. 11 is a front view showing the configuration of the twin band saw according to the embodiment of the present invention.

FIG. 12 is a side view showing a configuration of a twin band saw according to an embodiment of the present invention.

FIG. 13 is a sectional view showing the structure of the stopper means in the drawing showing the second embodiment of the present invention.

FIG. 14 is a cross-sectional view showing a configuration of a grip portion in a conventional example.

[Explanation of symbols]

 1 Orbit 3 Twin Band Saw 17 Feed Cart 51 Base 53 Base 55 Log 65 Grip 67 Grip 101 Rotation Drive Means 121 Stopper Means 131 Centering Means

Claims (4)

[Claims] 1. A material feeding carriage that is arranged along a track so as to be able to move forward and backward in the twin band saw direction, and is arranged at both ends of the material feeding carriage so that it can move forward and backward in the twin band saw direction on the material feeding carriage. A pair of bases arranged, a pair of gripping means attached to the tips of the pair of bases to grip both ends of the raw wood, and a pair of gripping means attached to the pair of bases.
And a centering means for rotating the gripping portion within a predetermined range according to the relationship between the cam and the cam floor, which are respectively mounted on the pair of bases. Timber equipment. 2. The material feeding apparatus according to claim 1, wherein the rotation driving means includes stopper means for restricting 90 ° rotation of the gripping means by stopping collision. 3. The material feeding apparatus according to claim 2, wherein the stopper means rotates the gripping means by 90 ° in any of the left and right directions to collide with and stop the material feeding apparatus. . 4. The material feeding device according to claim 1, wherein a pusher means is attached to the tip of the base, and when the gripping means is detached from the log, the gripping means is forced out of the log by protruding toward the log. The material feeding device characterized in that the material feeding device is adapted to be detached.