JP4603296B2 - Log centering and feeding device - Google Patents

Description

  The present invention relates to a log centering and supplying apparatus in a rotary race.

As a conventional log centering device, for example, as shown in Patent Document 1 , the supply of the log 7 between the centering spindles 29 is temporarily centered by a V-shaped frame (not shown) provided so as to be movable up and down. Then, it is supplied or supplied by a known log charger (not shown), and then the second actuating member 35 is actuated to move the centering spindles 29 toward each other to clamp the log 7. Next, the centering spindle 29 is rotated at least once to calculate the cores assumed at both ends of the raw wood. Next, the cores assumed on both ends of the raw wood are made to coincide with the rotation center P of the turning spindle 9.
JP 2000-79604 A

In rotary racing, the minimum diameter of raw wood that can be turned is determined. The raw wood is transported to a factory in a long state and cut into a predetermined length at the factory. Then, it is carried into the V-shaped frame or the log charger, but at that time, a diameter much smaller than the minimum diameter is excluded and is not carried in, but a log having a diameter close to the minimum diameter is carried in.
Then, the following problems occur in the conventional device.
As shown in FIG. 1, the log 7 is centered by the V-shaped frame 4 and is sandwiched between the centering spindle 29, and then centering by the centering spindle 29 is completed. If the outer diameter of the raw wood 7 is smaller than the minimum diameter that can be turned by a rotary race, even if the movable frame 11 is moved and the raw wood 7 is held by the holding member 21, it cannot be held. At that time, the next log 7 ′ has already come to the V-shaped frame 4. Therefore, the automatic operation of the apparatus must be stopped and the log 7 must be removed by some method such as manual operation. Since the operation is stopped in the meantime, productivity is deteriorated.

The present invention has been invented in order to solve the above-described conventional problems, and includes a pair of rotatable holding members that hold a log at both ends of the log and a rotation that rotates at least one of the pair of holding members. A mechanism, a supply mechanism for supplying a log to a pair of clamping members, a first calculation mechanism for calculating a temporary core of the log before the supply mechanism supplies the log to the pair of clamping members, and a pair of clamped logs and the holding member by at least one revolution in the rotation mechanism, a second operation mechanism for calculating the diameter around the turning center and revolving Kezushin of raw wood, and hold the timber in both butt surface, the pair of clamping members When supplying a pair of supply members movable to any position up to the rotary race and movable in a direction including a component in a direction orthogonal to the moving direction, and a supply mechanism to supply the log to the pair of clamping members, Original calculated by one calculation mechanism The temporary core is supplied to the pair of holding members by the supply mechanism so as to coincide with the position shifted by a predetermined distance from the rotation center line of the pair of holding members, and then the pair of holding members holding the raw wood is at least 1 by the rotation mechanism. Rotate and calculate the turning center of the raw wood and the diameter centered on the turning core with the second calculation mechanism. If the diameter is equal to or larger than the minimum diameter that can be turned with the rotary race, then calculate with the second calculation mechanism. The raw wood is clamped by the pair of supply members so that the turning core of the raw wood coincides with the axis of the spindle of the rotary race before the raw wood is supplied from the pair of clamping members to the rotary race. supplied to the rotary race from, also the diameter is moved to an arbitrary position in the middle of the pair of clamping members to hold the raw wood is less than the minimum diameter of a pair of feed member to a rotary race , And a controller to release the holding of the raw wood in the pair of feed members, in timber centering feed apparatus constituting (claim 1). In this case, when the controller supplies the raw wood to the pair of holding members by the supply mechanism, the temporary core of the raw wood calculated by the first calculation mechanism is supplied with the component in the direction toward the supply member from the rotation center line of the pair of holding members. The supply mechanism supplies the pair of holding members so as to coincide with a position shifted by a predetermined distance in the including direction, and then the pair of holding members holding the raw wood is rotated at least once by the rotating mechanism, and the second arithmetic mechanism uses the raw wood. If the diameter is equal to or greater than the minimum diameter that can be turned with a rotary race, then the raw wood after the computation with the second computation mechanism is removed from the pair of clamping members. The raw wood is sandwiched between a pair of supply members and supplied to the rotary race so that the turning core of the raw wood coincides with the axis of the spindle of the rotary race. Before After the raw wood is sandwiched between a pair of feed members are moved from the pair of clamping members at any position in the middle to the rotary race is less than the minimum diameter, to release the holding of the raw wood in the pair of feed members (Claim 2).
In addition, a pair of rotatable clamping members that clamp the log at both ends, a rotation mechanism that rotates at least one of the pair of clamping members, a supply mechanism that supplies the log to the pair of clamping members, and a log by the supply mechanism Until the pair of holding members is supplied to the pair of holding members, the first calculating mechanism for calculating the first diameter and the temporary core of the raw wood, and the pair of holding members holding the raw wood are rotated at least once by the rotation mechanism, a second calculation device for calculating a second diameter around the turning center and revolving Kezushin, to hold the timber in both butt surface, movable from a pair of clamping members at any position up to the rotary race and the mobile When a raw material is supplied to a pair of clamping members by a supply mechanism and a pair of supply members that are respectively movable in a direction including a component perpendicular to the direction, the first diameter of the raw wood calculated by the first arithmetic mechanism is a predetermined diameter. In the above case, the temporary core of the raw wood The pair of clamping members are supplied to the pair of clamping members so as to coincide with the rotation center line of the pair of clamping members, and then the pair of clamping members that sandwich the log are rotated at least once by the rotation mechanism, and then the log by the second calculation mechanism The turning center of the raw wood and the second diameter centered on the turning core are calculated, and then the turning core of the raw wood is turned into the rotary race before the calculated raw wood is supplied from the pair of clamping members to the rotary race. The raw wood is sandwiched between a pair of supply members and supplied to the rotary race so as to coincide with the axis of the spindle of the first spindle, and the first diameter of the raw wood calculated by the first computing mechanism is predetermined. If the diameter is less than the diameter, the temporary core of the raw wood is supplied to the pair of holding members by the supply mechanism so as to coincide with the position shifted by a predetermined distance from the rotation center line of the pair of holding members, and then the pair of raw woods The clamping member can be rotated If at least one rotation is performed, the second calculation mechanism calculates the turning center of the raw wood and the second diameter centered on the turning center, and then the second diameter is equal to or larger than the minimum diameter that can be turned by the rotary race, The raw wood is processed by the pair of supply members so that the turning core of the raw wood coincides with the axis of the spindle of the rotary race before the raw wood after the calculation by the second arithmetic mechanism is supplied from the pair of holding members to the rotary race. Clamping and supplying to the rotary race from a pair of clamping members, and if the second diameter is less than the minimum diameter, the log is clamped by a pair of supply members and any intermediate part from the pair of clamping members to the rotary race And a controller for releasing the holding of the raw wood between the pair of supply members after moving to a proper position (Claim 3).
In this case, when the controller supplies the log to the pair of holding members, if the first diameter of the log calculated by the first calculation mechanism is equal to or larger than a predetermined diameter, the temporary core of the log is clamped by a pair. The supply mechanism supplies the pair of holding members so as to coincide with the rotation center line of the member, and then the pair of holding members holding the raw wood is rotated at least once by the rotating mechanism, and the turning center of the raw wood is obtained by the second arithmetic mechanism. And the second diameter around the turning center is calculated, and then the turning core of the raw wood is rotated by the second arithmetic mechanism until the raw wood is supplied from the pair of clamping members to the rotary race. The raw wood is sandwiched between a pair of supply members and supplied to the rotary race so as to coincide with the axial line, and the first diameter of the raw wood calculated by the first computing mechanism is less than a predetermined diameter. In this case, the raw wood temporary core The supply mechanism supplies the pair of holding members so as to coincide with a position shifted by a predetermined distance in the direction including the component on the supply member side from the rotation center line of the member, and then rotates the pair of holding members holding the log. If the mechanism is rotated at least once, the turning center of the raw wood and the second diameter around the turning core are calculated by the second calculation mechanism, and then the second diameter is equal to or larger than the minimum diameter that can be turned by the rotary race The pair of supply members is arranged such that the turning core of the raw wood coincides with the axis line of the spindle of the rotary race before the raw wood after calculation by the second calculation mechanism is supplied from the pair of holding members to the rotary race. in is sandwiched between and fed to the rotary race of a pair of clamping members, also of the raw wood if the second diameter is less than the minimum diameter is sandwiched between a pair of feed members from the pair of clamping members to a rotary race After moving to an arbitrary position in the may be constructed (claim 4) so as to release the holding of the raw wood in the pair of feed members.
It is assumed that the predetermined diameter is larger than the minimum diameter.

  According to the present invention, even when a raw wood having a diameter smaller than the minimum diameter of the raw wood that can be turned by a rotary race is carried in, the raw wood can be eliminated in the automatic operation, so that the productivity is not deteriorated.

  When supplying the raw wood to the centering spindle with the supply mechanism, if at least the outer diameter of the raw wood is less than or equal to the predetermined diameter, the temporary core of the raw wood is placed in a direction including the component above the axis of the centering spindle. Supply by shifting a predetermined distance.

An embodiment will be described with reference to FIGS. 2 is a schematic side view, and FIG. 3 is a view taken along AA in FIG. 2 shown in FIG. 2 is a conventionally known rotary race.
The configuration of the supply member will be described. Reference numeral 5 denotes a horizontal frame provided extending in the X direction, which is a horizontal direction perpendicular to the direction of the axial center line of the turning spindle 9 that sandwiches and rotates the raw wood of the rotary race 1. As shown in FIG. 3, the horizontal frames 5 and 5a have both ends of a movable frame 11 extending in the Z direction parallel to the axial center line of the turning spindle 9, and the turning spindle 9 shown in FIG. It is supported so as to be movable in the X direction orthogonal to the axial center line. As shown in FIG. 3, both end portions of the movable frame 11 are screwed into feed screws 15 and 15a that are axially supported with an axial center line in the X direction. As shown in FIG. 2, the feed screws 15 and 15a are connected to electric motors 13 and 13a (not shown) such as servomotors attached to the horizontal frames 5 and 5a. The movable frame 11 is reciprocated between the upper part of the turning spindle 9 and the upper part of centering spindles 29 and 29a described later by feed screws 15 and 15a rotated by the electric motors 13 and 13a. Further, detectors 14 and 14a such as rotary encoders are attached to the electric motors 13 and 13a, respectively, and detect the position of the movable frame 11 in the X direction.
Further, as shown in FIG. 3, a pair of opposed holders 17 and 17 a are supported on the movable frame 11 so as to be movable in the Z direction in the longitudinal direction of the movable frame 11, and each of the holders 17 and 17 a corresponds to the movable frame 11. It is connected to cylinders 19 and 19a such as hydraulic pressure and pneumatic pressure provided on a mounting plate 11a suspended in the middle. Each of the holders 17 and 17a is moved in a direction in which the Z directions are close to each other and a direction in which they are separated from each other by the operation of the cylinders 19 and 19a.
On the relative surfaces of the holders 17 and 17a, holding members 21 and 21a having claw portions 22 and 22a are respectively supported so as to be movable in the Y direction which is the vertical direction. The holding members 21 and 21a are respectively screwed into the feed screws 25 and 25a, and the feed screws 25 and 25a are respectively connected to electric motors 23 and 23a such as servo motors fixed to the holders 17 and 17a. ing. Further, detectors 24 and 24a such as rotary encoders are attached to the electric motors 23 and 23a, respectively, and detect the positions of the holding members 21 and 21a in the Y direction.
As shown in FIG. 2, the holding members 21 and 21a pass through arbitrary points with respect to the holding members 21 and 21a, for example, the center of the holding members 21 and 21a in the X direction. A virtual line VL1 that is parallel to the vertical movement direction of the members 21 and 21a is set in advance.

The configuration of the pair of clamping members will be described. As shown in FIG. 3, reference numerals 29 and 29a denote a pair of opposing centering spindles having an axis center line parallel to the axis center line of the turning spindle 9, The claw portions 30 and 30a are supported on the outer periphery of the center portion of the centering spindle 29a so that the spline groove 29b is parallel to the shaft center line and has a predetermined width. It is formed with. Further, hydraulic and pneumatic cylinders 35 and 35a are rotatably connected to outer ends of the pair of centering spindles 29 and 29a, and the pair of centering spindles 29 and 29a are operated by the operation of the cylinders 35 and 35a. 29a is moved in the direction of the axis center line Z, and both ends of the raw wood to be centered are clamped.
Further, as shown in FIG. 2, the pair of clamping members are arranged at positions spaced a predetermined distance in the X direction from the axial center line of the turning spindle 9.

  The structure of the rotating mechanism will be described. As shown in FIG. 3, the rotating body 33 is engaged with the spline groove 29b formed in the centering spindle 29a so as to be prevented from rotating around the axial center line. On the other hand, a centering spindle 29a is slidably engaged in the axial center line Z direction. The rotating body 33 is connected to an electric motor 31 such as a servo motor via a connecting member 32 such as a chain. In addition, a detector 31a such as a rotary encoder is attached to the electric motor 31 to detect the rotated position of the centering spindle 29a.

The configuration of the second calculation mechanism will be described. As shown in FIG. 3, for example, the three detectors 37 are at a height substantially matching the centering spindles 29 and 29a, and the log is centered with the centering spindles 29 and 29a. In the state clamped by 29a, it is attached with respect to the raw wood relative to the outer peripheral surfaces of the both ends in the Z direction and the intermediate portion. Further, as shown in FIG. 2, it is mounted at a distance L1 in a substantially horizontal direction from the centering spindles 29 and 29a.
Each detector 37 includes a light source that irradiates light toward the outer peripheral surface of each part of the log and a light receiving member (none of which is shown) that receives reflected light from the outer peripheral surface.

Explaining the configuration of the supply mechanism,
As shown in FIG. 2, the temporary centering block 41 having a V-shape is a pair of left and right as shown in FIG. 3, and is vertically moved along the inner sliding surfaces 4b and 4d of the pair of left and right machine frames 4, 4a. It is attached movably.
The temporary centering blocks 41 and 41a are screwed with feed screws 43 and 43a made of ball screws or the like, and the feed screws 43 and 43a are respectively connected to electric motors 45 and 45a made of servo motors or the like.
In addition, detectors 47 and 47a such as a rotary encoder are attached to the electric motors 45 and 45a, respectively, and detect the positions of the temporary centering blocks 41 and 41a in the Y direction.
Reference numeral 48 shown in FIG. 2 denotes a detector such as a reflective photoelectric switch that detects a log on the temporary centering blocks 41 and 41a.
Reference numeral 49 denotes a known carry-in conveyor that sequentially carries logs into the temporary centering blocks 41 and 41a, and a return preventing claw 49a is attached at an appropriate interval in the carry-in direction. The carry-in conveyor 49 is driven when the temporary centering blocks 41 and 41a are in the standby state at the lower limit predetermined position and the detector 48 does not detect the log.
And each mechanism and each member are cylinders 19, 19a, 35, 35a, motors 13, 13a, 23 by signals from detectors 14, 14a, 24, 24a, 31a, 37, 47, 47a, 51, 51a, etc. , 23a, 31, 45, 45a, the carry-in conveyor 49, and the like are controlled by a controller as will be described later.

Next, the operation of the embodiment will be described.
When the operation is started, as shown in FIG. 4, the controller receives signals from the detectors 47, 47 a, and 48 so that the temporary centering blocks 41 and 41 a are waiting at a predetermined position at the lower limit and the temporary centering is performed. It is determined that there is no log on the blocks 41 and 41a, and then the carry-in conveyor 49 is driven by a signal from the controller. Along with this driving, the raw wood 7 whose front end 7a is indicated by a solid line and the opposite end 7b is indicated by a wavy line is carried in by a carry-in conveyor 49, and is placed on the temporary centering blocks 41 and 41a as indicated by an imaginary line. get on.
The signal from the detector 48 that has detected the log 7 causes the carry-in conveyor 49 to be braked by the signal from the controller, and the motors 45 and 45a are driven to raise the temporary centering blocks 41 and 41a, and the log 7 is raised. Let At the same time, signals from the detectors 47 and 47a are sent to the controller.

5, the distance L3 from the position where the detector 51a detects the upper part on the 7b side of the log 7 to the axial center of the centering spindle 29a, and the detector 51a also detects the upper part on the 7b side of the log 7 The distance L4 from the detection position to the predetermined position at the lower limit of the temporary centering block 41a indicated by a two-dot chain line, the shape and dimensions of the temporary centering block 41a, and the like are input to the controller in advance.
Similarly, the distance L3 from the position where the detector 51 detects the upper part on the 7a side of the log 7 shown in FIG. 6 to the axial center of the centering spindle 29, and the detector 51 is also the upper part on the 7a side of the log 7 The distance L4 from the position to detect the lower limit of the temporary centering block 41 indicated by a two-dot chain line to a predetermined position, the shape and dimensions of the temporary centering block 41, and the like are input to the controller in advance.
The controller has a predetermined diameter and a minimum diameter that can be turned with a rotary race. Hereinafter, the case where the log is larger than the predetermined diameter will be described.
Then, as shown in FIG. 5, when the upper part on the 7b side of the rising log 7 is detected by the detector 51a, the signal is sent to the controller. Then, the controller calculates the diameter on the 7b side of the log 7 from the distance L5 that the temporary centering block 41a is raised by the signal from the detector 47a at that time, the L4, the shape / size of the centering block 41a, A radius L6 on the 7b side of the log 7 is calculated.
Similarly, as shown in FIG. 6, when the upper part of the rising log 7 on the 7a side is detected by the detector 51, the signal is sent to the controller. Then, the controller calculates the diameter on the 7a side of the log 7 from the distance L7 where the temporary centering block 41 is raised by the signal from the detector 47 at that time, L4, the shape / size of the centering block 41, A radius L8 on the 7a side of the log 7 is calculated. At this time, the controller determines that the diameters on the 7a side and 7b side are equal to or larger than a predetermined diameter.
Next, as shown in FIG. 7, the controller detects the distance L3 + L6 from the state where the temporary centering block 41a detects the upper part of the raw wood 7 on the 7b side, and the temporary centering block 41 detects the upper part of the raw wood 7 on the 7a side. It is judged from the signal from each of the detectors 47a and 47 that the distance has risen by a distance of L3 + L8 from the above state, and the motors 45a and 45 are braked. As a result, the temporary core of the log 7 coincides with the centering spindles 29 and 29a when viewed from the Z direction.
Next, the controller operates the cylinders 35 and 35a shown in FIG. 3 to advance the centering spindles 29 and 29a, thereby holding the log 7 between both ends. Then, after a sufficient time has passed for the clamping, the controller reversely drives each of the motors 45a and 45 to return the temporary centering blocks 41a and 41 to the lower limit predetermined position.

Next, the electric motor 31 shown in FIG. 3 is driven by a signal from the controller, and as shown in FIG. 8, while the log 7 is rotated at least once in the direction of the arrow, the detector 37 causes the two log mouths 7a and 7b on the log 7 side. The distance L2 between the outer peripheral surface of the intermediate portion and the detector 37 facing the intermediate portion is measured, and the shape of the log 7 is calculated.
That is, the distance between the axis center line of the centering spindle 29 and each detector 37 is set to a predetermined distance L1 in advance.
While rotating the log 7 in this state, by each detector 37, for each rotation angle of the centering spindle 29, the both ends of the log 7 a and 7 b side and the outer peripheral surface of the intermediate portion and the detector 37 are connected. The distance L2 is measured to calculate the shapes of the both ends 7a and 7b and the intermediate portion, and when turning with the rotary race from the shape, the turning core that becomes the center of rotation for the most effective use of the raw wood 7 ( Hereinafter, the main core is calculated.
Then, as shown in FIG. 9, a main core 7c assumed on the front end 7a indicated by a solid line and a main core 7d assumed on the other end 7b indicated by a broken line are set. Further, an imaginary line ML1 passing through the main core 7c and the main core 7d is set as viewed from the Z direction parallel to the axial center line of the centering spindle 29.

Next, with the signal from the controller, as shown in FIG. 10, the log 7 is rotated in the direction of the arrow until the virtual line ML1 set in the log 7 becomes vertical as shown in FIG.
Next, with the signal from the controller, the electric motors 13 and 13a are turned on until the vertical line VL1 defined on the holding member 21 coincides with the virtual line ML1 set on the log 7 when viewed from the Z direction as shown in FIG. The movable frame 11 is moved by driving.
In the above description, after further rotating the virtual line ML1 set on the log 7 so as to coincide with the vertical direction, the holding member 21 is moved to the centering spindle 29 side, and the virtual line ML1 is moved to the virtual line ML1. The virtual line ML1 is made to coincide with the vertical line VL1 passing through the center, but the virtual line ML1 is moved in the vertical direction while the holding member 21 is moved to the centering spindle 29 side or after the holding member 21 is moved to the centering spindle 29 side. You may control to turn to.
Next, the controller determines that the coincidence is made based on signals from the detectors 14 and 14a, operates the cylinders 19 and 19a shown in FIG. 3 to move the holders 17 and 17a toward each other, and holds the holding members 21 and 19a. At 21a, the log 7 is held between both ends.
After a sufficient time has passed for the clamping, the controller moves the cylinders 35, 35a backward to move the centering spindles 29, 29a away from each other, thereby causing the centering spindles 29, 29a to move away from each other. Release the pinching of the log 7 by.

After a sufficient time has elapsed for the release, the controller, as shown in FIG. 12, sees the log 7 on a horizontal line 9a parallel to the feed screw 15 and passing through the rotation center P of the turning spindle 9 as seen from the Z direction. The electric motors 23 and 23a shown in FIG. 3 are driven to move the holding members 21 and 21a up and down, respectively, until the main cores 7c and 7d set on the respective end surfaces coincide with each other in the Y direction. Next, the controller determines that the coincidence has occurred by a signal from the detectors 24 and 24a, and brakes the motors 23 and 23a.
The action of causing the main cores 7c and 7d set on the log 7 sandwiched between the holding members 21 to coincide with the rotation center P of the turning spindle 9 in the X direction is performed by the operation described later. You may perform in the middle or after moving to 9 side.

Next, as shown in FIG. 13 by a signal from the controller, the motor 13 and 13a are reversely driven, and the movable frame 11 is viewed from the Z direction in the state where the raw wood 7 is sandwiched between the holding members 21 and 21a. The main cores 7c and 7d set on the front end of the wood are moved until they coincide with the rotation center P of the turning spindle 9.
Next, in response to a signal from the controller, an operating member (not shown) is operated to move the respective turning spindles 9 in directions close to each other, and the main spindles 7c and 7d of the log 7 are moved by the turning spindle 9. Hold it.
After a sufficient time has elapsed for clamping, the cylinders 19 and 19a are actuated by a signal from the controller to release the holding of the log 7 by the holding members 21 and 21a.
Thereafter, the same operation is repeated for the next log. Then, as shown in FIG. 14, the core material 7e that has been turned by the rotary race is released from the turning spindle 9, falls down, is rolled by an arbitrary guide 61 indicated by an imaginary line, and is an arbitrary conveyor indicated by an imaginary line. It is discharged at 63.

Next, the case where the log is less than a predetermined diameter will be described with reference to FIG.
The log 7 is put on the temporary centering blocks 41 and 41a by the same operation as described above, and the log 7 is raised by the rising of the temporary centering blocks 41 and 41a.
And if the upper part of the near side of the rising log 7 is detected by the detector 51, the signal is sent to the controller. Then, the controller calculates the diameter on the near side of the log 7 from the distances L9 and L4 where the temporary centering block 41 has moved up by the signal from the detector 47 at that time, and the shape and dimensions of the centering block 41, 7 is calculated. Further, as a result of detection by the detector 51a, the radius of the calculation result beyond the log 7 is L10 ′.
In this case, the controller determines that the log 7 is less than the predetermined diameter if at least one of the diameter detected by the detector 51 and the diameter detected by the detector 51a is less than the predetermined diameter.
Then, as shown in FIG. 15 (b), the controller detects the temporary centering block 41 from the time point detected by the detector 51 as a total distance of L10 + L3 + L11, and from the time point detected by the detector 51a, the temporary centering block 41a is set to L10 ′. The total distance of + L3 + L11 is raised and stopped. That is, when viewed from the Z direction, the temporary core of the log 7 is set at a distance L11 from the axis of the centering spindles 29 and 29a.
Next, the controller holds the log 7 with the centering spindles 29 and 29a, and then lowers the temporary centering blocks 41 and 41a to a predetermined position at the lower limit.
Next, as shown in FIG. 15C, the controller rotates the log 7 at least once by the same operation as described above, and sets the main core to the log 7 as described above. At this time, when the log 7 is larger than the minimum diameter that can be turned by a rotary race preset in the controller, the operation described with reference to FIGS. 9 to 14 is performed.
Further, when the log 7 is less than the minimum diameter that can be turned by a rotary race preset in the controller, as shown in FIG. The motors 13 and 13a are driven to move the movable frame 11 until the determined vertical line VL1 coincides with the axis of the centering spindle 29.
Next, the controller determines that the coincidence is made based on signals from the detectors 14 and 14a, operates the cylinders 19 and 19a shown in FIG. 3 to move the holders 17 and 17a toward each other, and holds the holding members 21 and 19a. At 21a, the log 7 is held between both ends.
After a sufficient time has passed for the clamping, the controller moves the cylinders 35, 35a backward to move the centering spindles 29, 29a away from each other, thereby causing the centering spindles 29, 29a to move away from each other. Release the pinching of the log 7 by.
After a sufficient time has elapsed for the release, as shown in FIG. 17, the controller positions the vertical line VL1 defined on the holding member 21 above any conveyor 63 indicated by an imaginary line in the X direction. The movable frame 11 is moved by reversely driving the electric motors 13 and 13a.
Next, the controller determines that it has moved to the position by using signals from the detectors 14 and 14a, and brakes the motors 13 and 13a.
Next, in response to a signal from the controller, the cylinders 19 and 19a are operated to release the holding of the log 7 by the holding members 21 and 21a. The log 7 falls on an arbitrary conveyor 63 indicated by an imaginary line and is discharged.

  According to the above embodiment, even when a log having a diameter smaller than the minimum diameter of the log that can be turned by the rotary race is carried in, the log can be discharged automatically.

When the log is less than a predetermined diameter, the temporary core is positioned at a distance L11 from the axis of the centering spindles 29 and 29a, but the temporary centering spindle 29 side and the temporary centering spindle 29a side. And the distance to the top may be different.
In the embodiment, the temporary core of the raw wood is shifted right above the axis of the centering spindle 29, but it may be a direction including an upward component. That is, in the embodiment, since the holding member moves to the upper side of the centering spindle, the temporary core of the raw wood is shifted upward. Therefore, the temporary lead is shifted to the side where the holding member moves.
In the embodiment, when the diameter of the raw wood is less than the predetermined diameter, the temporary cores of the raw wood are shifted above the centering spindle 29, but all the temporary cores of the raw wood are above the centering spindle 29. It may be shifted.
In the embodiment, the movement of the supply member in the X direction is a linear movement, but it may be configured as a swinging type.

It is the schematic of a conventional apparatus. It is a schematic side view of the Example of invention. FIG. 3 is a partially omitted AA view of FIG. 2. It is operation | movement explanatory drawing of the Example in case a log is more than a predetermined diameter. It is operation | movement explanatory drawing of the Example in case a log is more than a predetermined diameter. It is operation | movement explanatory drawing of the Example in case a log is more than a predetermined diameter. It is operation | movement explanatory drawing of the Example in case a log is more than a predetermined diameter. It is operation | movement explanatory drawing of the Example in case a log is more than a predetermined diameter. It is operation | movement explanatory drawing of the Example in case a log is more than a predetermined diameter. It is operation | movement explanatory drawing of the Example in case a log is more than a predetermined diameter. It is operation | movement explanatory drawing of the Example in case a log is more than a predetermined diameter. It is operation | movement explanatory drawing of the Example in case a log is more than a predetermined diameter. It is operation | movement explanatory drawing of the Example in case a log is more than a predetermined diameter. It is operation | movement explanatory drawing of the Example in case a log is more than a predetermined diameter. It is operation | movement explanatory drawing of the Example in case a log is less than a predetermined diameter. It is operation | movement explanatory drawing of the Example in case a log is less than a predetermined diameter. It is operation | movement explanatory drawing of the Example in case a log is less than a predetermined diameter.

Explanation of symbols

29... Centering spindle 37... Detector 41. Temporary centering recording block 57... Detector

Claims (4)

A pair of rotatable clamping members that clamp the log at both ends,
A rotation mechanism for rotating at least one of the pair of clamping members;
A supply mechanism for supplying a log to a pair of clamping members;
A first calculation mechanism for calculating a temporary core of the log before the log is supplied to the pair of clamping members by the supply mechanism;
A second computing mechanism that computes a turning center of the raw wood and a diameter around the turning core by rotating at least one turn of the pair of clamping members that sandwich the raw wood with a rotation mechanism;
Sandwiching the raw wood in both butt surfaces, a pair of movable from the clamping member at any position up to the rotary race, and direction to each movable pair of feed members and the supply mechanism that includes a component in a direction perpendicular to the moving direction When the log is supplied to the pair of clamping members, the supply mechanism causes the pair of clamping members so that the temporary cores of the logs calculated by the first calculation mechanism coincide with the positions shifted by a predetermined distance from the rotation center line of the pair of clamping members. Next, a pair of clamping members that sandwich the raw wood are rotated at least once by a rotation mechanism, and a turning center of the raw wood and a diameter around the turning core are calculated by a second calculation mechanism, and then the diameter Is larger than the minimum diameter that can be turned by the rotary race, the turning center of the log of the raw wood is supplied to the rotary race from the pair of holding members to the rotary race by the second calculation mechanism. The logs are clamped by a pair of supply members so as to coincide with each other and supplied to the rotary race from the pair of clamp members. If the diameter is less than the minimum diameter, the logs are clamped by the pair of supply members. A controller for releasing the holding of the raw wood by the pair of supply members after being moved to an arbitrary position on the way from the pair of holding members to the rotary race,
A log centering and feeding device composed of When the controller supplies the log to the pair of holding members by the supply mechanism, the temporary core of the log calculated by the first calculation mechanism is arranged to include a component in the direction of the supply member from the rotation center line of the pair of holding members. The supply mechanism supplies the pair of holding members so as to coincide with a position shifted by a predetermined distance, and then the pair of holding members holding the raw wood is rotated at least once by the rotation mechanism, and the turning center of the raw wood is obtained by the second arithmetic mechanism. If the diameter is equal to or larger than the minimum diameter that can be turned by the rotary race, the raw wood calculated by the second calculation mechanism is supplied from the pair of clamping members to the rotary race. Until the turning center of the raw wood coincides with the axis of the spindle of the rotary race, the raw wood is clamped by a pair of supply members and supplied from the pair of clamping members to the rotary race. diameter After the raw wood is sandwiched between a pair of feed members are moved from the pair of clamping members at any position in the middle to the rotary race if fully, so as to release the holding of the raw wood in the pair of feed members The log centering / supplying device according to claim 1, which is configured. A pair of rotatable clamping members that clamp the log at both ends,
A rotation mechanism for rotating at least one of the pair of clamping members;
A supply mechanism for supplying a log to a pair of clamping members;
A first calculation mechanism for calculating a first diameter and a temporary core of the log before the log is supplied to the pair of holding members by the supply mechanism;
A second computing mechanism that computes a turning core of the raw wood and a second diameter around the turning core by rotating at least one rotation of the pair of clamping members that sandwich the raw wood with a rotation mechanism;
Sandwiching the raw wood in both butt surface, and optionally movable in the position and each movable pair of feed member in a direction that contains a component in a direction perpendicular to the moving direction of the pair of clamping members to a rotary race,
When supplying the log to the pair of clamping members by the supply mechanism, if the first diameter of the log calculated by the first calculation mechanism is equal to or larger than the predetermined diameter, the temporary core of the log coincides with the rotation center line of the pair of clamping members The supply mechanism supplies the pair of holding members to each other, and then the pair of holding members holding the raw wood is rotated at least one turn by the rotation mechanism, and the turning center of the raw wood and the turning core are centered by the second arithmetic mechanism. The turning core of the raw wood is aligned with the axis of the spindle of the rotary race until the second computing mechanism calculates the second diameter and then supplies the raw wood after the computation by the second computing mechanism to the rotary race from the pair of clamping members. In addition, the log is sandwiched between a pair of supply members and supplied to the rotary race from the pair of sandwich members.
In addition, when the first diameter of the raw wood calculated by the first arithmetic mechanism is less than the predetermined diameter, the supply mechanism is configured so that the temporary core of the raw wood coincides with a position shifted by a predetermined distance from the rotation center line of the pair of holding members. The pair of clamping members that are supplied to the pair of clamping members, and then the pair of clamping members that sandwich the raw wood are rotated at least once by the rotation mechanism, and the turning center of the raw wood and the second diameter around the turning core are calculated by the second calculation mechanism Then, if the second diameter is equal to or larger than the minimum diameter that can be turned by the rotary race, the turning center of the raw wood is rotated before the raw wood after the computation by the second computing mechanism is supplied from the pair of clamping members to the rotary race. The raw wood is clamped by a pair of supply members so as to coincide with the axis of the race spindle, and supplied to the rotary race from the pair of clamping members. If the second diameter is less than the minimum diameter, the raw wood A pair of supply After moving a pair of clamping members at any position in the middle to the rotary race pinched in wood, a controller for releasing the holding of the raw wood in the pair of feed members,
A log centering and feeding device composed of When the controller supplies the log to the pair of holding members when the first diameter of the log calculated by the first calculation mechanism is greater than or equal to a predetermined diameter, the temporary core of the log is rotated by the pair of holding members. The supply mechanism supplies the pair of holding members so as to coincide with the center line, and then the pair of holding members holding the raw wood is rotated at least once by the rotation mechanism, and the turning center of the raw wood and the turning are obtained by the second arithmetic mechanism. The second diameter centered on the core is calculated, and then the turning core of the raw wood is on the axis line of the spindle of the rotary race before the calculated raw wood is supplied from the pair of clamping members to the rotary race. So that the log is sandwiched between a pair of supply members and supplied to the rotary race from the pair of sandwich members,
In addition, when the first diameter of the raw wood calculated by the first arithmetic mechanism is less than the predetermined diameter, the temporary wood core has a predetermined distance in a direction including a component in the direction toward the supply member from the rotation center line of the pair of holding members. The supply mechanism supplies the pair of holding members so as to coincide with the shifted position, and then the pair of holding members holding the raw wood is rotated at least once by the rotation mechanism, and the second arithmetic mechanism and the turning core of the raw wood If the second diameter centered on the turning core is calculated, and the second diameter is equal to or larger than the minimum diameter that can be turned by the rotary race, the log after calculation by the second calculation mechanism is changed from the pair of clamping members to the rotary race. The raw wood is clamped by a pair of supply members so that the turning core of the raw wood coincides with the axis of the spindle of the rotary race before being supplied, and supplied from the pair of clamping members to the rotary race. Diameter is the smallest After the raw wood is sandwiched between a pair of feed member is moved to an arbitrary position in the middle of the pair of clamping members to a rotary race is less than the diameter, so as to release the holding of the raw wood in the pair of feed members The log centering / supplying device according to claim 3, which is configured as follows.

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