JP2007301527A - Pruned branch crusher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a feeding device for carrying out pretreatment of relatively thick pruned branches by feeding rollers and supplying the branches to a biaxial cutter in a pruned branch crusher which chips pruned branches by the biaxial cutter. <P>SOLUTION: Feeding rollers of a pair of rolls are set between a biaxial cutter and an aperture in a hopper lower end and a bearing for one roll of the roll pair is fixed and a bearing for the other roll is made movable. The bearing is drawn by approximately constant energizing power by energizing means toward the other fixed bearing side. A plurality of vertical cutting blades are installed at intervals in axial direction in one of the paired feeding rollers. A large number of the vertical cutting blades are set at intervals in the circumferential direction. Pruned branches are fed to the cutter while being pinched with the paired rolls of the feeding rollers and during the feeding operation, the vertical cutting blades in one roll cut into and pull in the pruned branches to form notches in the vertical direction. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention relates to a pruning branch crusher for pruning branches of trees, and more particularly to a feeding device thereof, which facilitates cutting of pruned branches with a cutter and improves its crushing ability, Even when a thick pruned branch is included, the pruned branch can be easily and easily crushed.

In orchards, etc., it is common to manually collect the pruned branches, carry them out of the orchard, collect them in one place, and then shred and crush them with a cutter such as a chopper, shredder, or biaxial cutter. .
On the other hand, Japanese Patent Laying-Open No. 2005-28307 discloses a self-propelled tree crushing machine that collects pruned branches scattered while self-propelled in an orchard and collects them. This is a pruning branch that has been scooped up by the left and right scrapers that are scattered in the ground by self-propelled by the left and right crawlers, scooped up by the branch stand, and scooped up by the branch stand Is fed into a cutter, chopped and crushed.
In addition, the invention has been described in the specification of the prior application of the present applicant, in which the pruning branches gathered together in approximately the same direction are smoothly and surely scraped, and the scraping mechanism is devised so as to be retracted. (Japanese Patent Application No. 2005-295471).
On the other hand, there is also a stationary pruning branch crusher, in which the collected pruning branches are put into a hopper by an operator and sent to a cutter provided at the lower end of the hopper to be shredded.

By the way, the pruned branches are somewhat thick, and the thicker the resistance to the cutter, the greater the resistance to shredding when the pruned branches are shredded. When the thickness of the pruned branch exceeds the limit, shredding is impossible and the cutter stops.
There are various types of shredding cutters, but choppers and shredders have a large impact on shredded branch shredding and noise. On the other hand, since the biaxial cutter has little impact and little noise, and the operation is quiet, it is desirable to realize a pruned branch crusher using this biaxial cutter.
Since the biaxial cutter itself has a feeding function (retraction function), it can be shredded while being pulled by itself even if it does not have a feeding device for feeding the pruning branch to the cutter. But it has its limits. That is, when the pruned branch is shredded with a biaxial cutter, it is smooth for relatively thin pruned branches, but when the pruned branch becomes a little thicker, it cannot be bitten by itself, and therefore It cannot be drawn and shredded. If a feed roller is provided and forcedly pushed into the biaxial cutter, the pruned branch of a certain thickness can be smoothly bitten, but if it exceeds that, it will idle without being bitten.
Incidentally, when a pruning branch (specifically, pear pruning branch) is fed into a biaxial cutter with an outer diameter of 158 mm with a feed roller, when the diameter becomes about 40 mm, the biting is not smooth and the shredding efficiency is improved. Deteriorate. And if there is a node at the cut end of the pruned branch, it becomes difficult to bite and pull it. In addition, even if there are no nodes at the cut edge of the pruned branch, it becomes impossible to bite when the diameter is about 60 mm.

On the other hand, if the biaxial cutter has a large diameter, a thicker pruned branch can be bitten, and even those having a diameter of about 60 mm can be bitten without difficulty. However, if it does so, the enlargement, weight increase, and production cost increase of an apparatus are unavoidable, and after all, practical use and the spread of the pruning branch crushing machine by a biaxial cutter become difficult.
Therefore, in order to realize a pruning branch crusher that can be used while taking advantage of the characteristics of the biaxial cutter, use a biaxial cutter with a diameter as small as possible (about 158 mm at the maximum) and a pruning branch with a diameter as large as possible (about 50 mm in diameter). It is necessary to devise so that can be cut.
In order to solve the above problems, it is necessary to pre-process the pruned branch for a relatively thick pruned branch so that the biaxial cutter can easily bite, and it is necessary to efficiently and effectively perform this pre-processing. .
JP 2005-28307 A Japanese Patent Application No. 2005-295471

  Therefore, the present invention aims to solve the above-mentioned problems, and the problem is that a pruning branch crusher that shreds a pruned branch with a biaxial cutter is applied to a biaxial cutter by pre-treating a relatively thick pruned branch with a feed roller. It is to devise the feeding device to supply.

Means for solving the above-mentioned problem is a pruned branch crusher that feeds a pruned branch into a biaxial cutter with a feed roller and shreds it.
(A) A feed roller by a pair of rolls is interposed between the biaxial cutter and the opening at the lower end of the hopper,
(B) The bearing of one roll of the pair of rolls is fixed to the roller frame, the bearing of the other roll is movably attached to the roller frame, and the movable bearing is moved to the other fixed bearing side by the biasing means. Is attracted by almost constant force,
(C) A plurality of vertically divided blades are provided on either one of the pair of rolls of the feed roller with an interval in the axial direction;
(D) A plurality of the above-mentioned split blades are provided at intervals in the circumferential direction of the roll,
(E) The pruned branch is sandwiched between a pair of rolls of the feed roller and sent to the cutter. During this feeding operation, the vertical cutting blade of the one roll bites into the pruned branch and pulls the pruned branch and breaks in the vertical direction. I tried to put it in.

For example, when the above-mentioned vertically divided blade is an object to be vertically divided having a diameter of 45 mm or more, the arrangement interval of the vertically divided blades in the roll axis direction may be set to 30 to 45 mm, for example. Moreover, what is necessary is just to make the arrangement | positioning space | interval of the circumferential direction of a roll outer peripheral surface into 90 degree | times or 120 degree | times (the number of blades is 4 or 3 for example), but when using a narrow blade | blade, the space | interval may also be narrowed. it can. However, as the interval is narrower, the driving load increases, and the torque limiter or the unloading valve of the hydraulic circuit mounted on the feed roll drive sprocket is operated to frequently stop feeding. The shape, size, and arrangement are appropriately selected in the specific mechanism design so as to enhance the function of vertically dividing the pruned branch while minimizing the driving load and to enhance the function of hooking and pulling the pruned branch as much as possible. There is a need. As for the shape of the vertically split blade, a fan-shaped blade is preferable to put the longitudinal cut into the pruned branch effectively with a relatively small load. On the other hand, the pulling force of the pruned branch by the vertically split blade is strongly increased. For this purpose, a pyramidal blade is preferred. And it is also one embodiment to arrange these two types of blades alternately in the roll circumferential direction.
The biasing means having the above requirement (b) is preferably as small as possible and capable of exerting a strong biasing force, and preferably capable of easily and easily adjusting the biasing force, and is constituted by a hydraulic cylinder. It is good. Then, a secondary hydraulic circuit (return hydraulic circuit) is connected to the hydraulic cylinder, a back pressure is applied by a throttle valve provided in the secondary hydraulic circuit, and an urging force is generated by the back pressure. Is good. Then, the urging force can be easily adjusted by adjusting the back pressure.

When the pruned branch is thin, it is smoothly bitten by the biaxial cutter regardless of the presence or absence of the split blade.
When a thick pruned branch is inserted into the feed roller, a split blade provided on one roll of the feed roller is pierced to scrape the side of the pruned branch or to make a vertical crack in this. Since the shaving action and the vertical splitting action are repeatedly performed at regular intervals by the vertical splitting blade, the thick pruned branch is scraped off to be thinned or split in the vertical direction. Therefore, even a thick pruned branch can easily be bitten by the biaxial cutter. Then, once the biaxial cutter bites the end of the pruned branch, it is surely pulled by itself and shredded. Further, the thicker pruned branches are trimmed by thinning the sides or by being vertically split, thereby reducing the cutting resistance against the biaxial cutter and increasing the crushing efficiency.
Further, since both rolls of the feed roller are pressed against each other by the biasing means with a substantially constant force, even the thick pruned branch is smoothly pulled in without significantly increasing its pull-in resistance.
By configuring the urging means with a hydraulic cylinder, a large urging force can be applied with a relatively small hydraulic cylinder, and the urging force can be easily and easily adjusted with a variable throttle or the like.

  If one of the pair of rolls constituting the feed roller has a longitudinally divided blade, it is split in the longitudinal direction. However, it is also possible to provide a vertically divided blade on both rolls so as to cut from both the front and back surfaces.

Next, an example in which the present invention is configured as a tractor attachment will be described with reference to the drawings.
The input shaft 1 of this embodiment is driven by a PTO shaft of an agricultural tractor and is supported by a bearing 2 of the frame 3. The frame 3 is connected to a three-point hitch (not shown) of an agricultural tractor.
A V pulley 4 is fixed to the input shaft 1, and a V pulley (driven pulley) 11 of the oil pump 10 is driven by the V pulley (driving pulley) 4. A thrower 5 is connected to the input shaft 1 via a joint, and a screw conveyor 8 is connected to the shaft of the thrower 5. The thrower 5 is covered with a casing 6 and a shooter 7.

A cutter frame 13 is disposed above the screw conveyor 8, and cutters 17 and 21 constituting a biaxial cutter are provided on the cutter frame 13.
The oil pump 10 driven by the V pulley 4 is a variable axial pump, and when the load pressure reaches a predetermined pressure, it is unloaded by the unload valve 10a so as not to be overloaded (see FIG. 8).
A roller frame 23 is provided on the frame 13, and a hopper 52 is fixed on the roller frame 23. The cutter frame 13 is inclined rearward, whereby the hopper 52 is inclined to facilitate the insertion of the pruned branch into the hopper.
The oil motor 14 that drives the cutters 17 and 21 is a radial piston type low-speed high-torque motor, and is fixed to the cutter frame 13.

The motor pinion 15 of the oil motor 14 meshes with the gear 16 of the cutter shaft 19 of the cutter 17. The drive gear 18 on the opposite side of the cutter 17 meshes with the gear 20 of the cutter 21, and the cutter shafts 19 and 22 of the cutters 17 and 21 are supported by the cutter frame 13.
The cutters 17 and 21 constituting the biaxial cutter are provided with chevron-shaped projections on the outer periphery, and are provided with tooth portions inclined in the tooth trace direction and cylindrical groove portions, and the tooth portions 17a and 21a and the groove portions 17b, 21b is combined with each other, and the outer periphery of the tip of the tooth portion is in contact with or lightly in contact with the bottom of the groove portion (see FIG. 4).

A feed roller 24 is provided above the cutter frame 13 (below the insertion port 52A of the hopper 52). The feed roller 24 is composed of a pulling roll 29 and a receiving roll 29a. The pulling roll 29 and the receiving roll 29a are pivotally supported by bearings 37 and 37 on the roller frame 23.
The pull-in roll 29 is provided with a vertical cutting blade, and is as shown in FIGS. The pulling roll 29 is composed of a regular octagonal cylindrical main body 71, axial sawtooth pulling teeth 72, 72 a (a tall tooth 72 and a low tooth 72 a), and a circumferential fan-shaped split blade 73. There are four retracting teeth 72 and 72a each fixed to the outer peripheral surface of the cylindrical main body 71 at intervals of 90 degrees, and four fan-shaped split blades 73 are two heights at 45mm intervals in the axial direction. Is arranged between the high retracting teeth 72, 72.

The width (in the feed roller axial direction) B of the inlet 52A of the hopper 52 is 168 mm (see FIG. 2), the cylindrical body 71 of the pulling roll 29 is a regular octagonal cylinder, and the diameter of its inscribed circle is 88 mm. The total length is 164 mm. The retractable tooth 72 is made of a steel plate having a thickness of 4.5 mm, and a saw tooth having a height of 14 mm and a pitch of 16 mm is formed at the tip thereof, and the height of the saw tooth is 34 mm. Further, the lower retracting tooth 72a has a height of 17 mm.
The sector-shaped split blade 73 is made of a steel plate having a thickness of 6 mm and has an arcuate blade at the tip. The blade width of the blade is 67 mm, and the edge 73e in the blade width direction is acute in order to improve the biting into the pruned branch.

  The receiving roll 29a is as shown in FIGS. This receiving roll 29a is made of steel, and rods 75 having a square cross section are arranged at equal intervals on the outer periphery of a regular octagonal cylindrical main body 74, and a U-shaped groove 76 is formed at equal intervals between them. It is what. The edge 75e of the bar 75 is right-angled, and is inserted into the pruned branch w that has been fed in and pulled into the biaxial cutter (see FIG. 13).

The pulling roll 29 is supported by a left roller support 38 and a right roller support 39 by bearings 37, 37, and the left and right roller supports 38, 39 are connected by a tie bar 41 (FIG. 7). Guide bosses 40, 40 ′ protrude from the axial center portions of the left and right roller supports 38, 39 and are attached so as to be slidable in guide holes 23 h provided in the roller frame 23. The pulling roll 29 is configured to approach and separate from the receiving roll 29a by sliding of the guide boss.
In this embodiment, the guide bosses 40 and 40 'are fitted in the guide holes 23h and supported so as to be slidable along the guide holes 23h. However, a needle roller or a ball is interposed on the sliding surface. If so, the sliding resistance of the sliding support mechanism can be reduced.
Further, a horizontal pivot shaft is provided on the strength member such as the roller frame 23, and the roller supports 38 and 39 are supported by the pivot shaft so as to swing within a vertical plane, thereby forming a swing-type support mechanism. (Not shown). When this swinging support mechanism is used, the retracting roll 29 moves smoothly toward and away from the receiving roll 29a.

The cutters 17 and 21 constituting the biaxial cutter 25 are a combination of one of the tooth portions 17a and 21a and the groove portions 17b and 21b, and are pushed by the inclined blades of the tooth portions 17a and 21a. The operation is quieter than that of cutting by shearing, and the generation of vibration and noise is slight. The structure and characteristics of the biaxial cutter are well known in the art. The larger the size, the higher the biting ability and crushing capacity for the thick pruned branch w, and the higher the crushing efficiency. However, as described above, the larger the diameter is, the more expensive it becomes, and the size of the crushing apparatus is increased, resulting in an increase in the overall manufacturing cost. Therefore, it is required to make the biaxial cutter as small as possible and to ensure a high crushing ability for the thick pruning branch w. The main specifications of the biaxial cutter 25 in this embodiment are as follows.
The outer diameters of the tooth portions 17a and 21a are 158 mm, and the bottom diameters of the groove portions 17b and 21b are 114 mm. The width of the teeth 17a and 21a and the width of the grooves 17b and 21b are 40 mm.

  The left and right roller supports 38 and 39 are always attracted toward the receiving roll 29a by a hydraulic cylinder 42 having one end connected to the rear part of the roller frame 23 and the other end connected to the lower part of the left and right roller supports 38 and 39. The hydraulic cylinder 42 is urged hydraulically in the contraction direction, and its oil supply line 42a is connected to the return side of the drive hydraulic circuit. A variable throttle 42 b is interposed between the control valve 53 and the oil tank 59, and an oil supply pipe 42 a of the hydraulic cylinder 42 is connected to a pipe line between the variable throttle 42 b and the control valve 53. . Then, the urging force by the hydraulic cylinder 42 is adjusted by adjusting the variable throttle 42b (see FIG. 8).

The lower end of the swing arm 26 is pivotally supported by the cutter shaft 22 of the biaxial cutter, and the upper end thereof is fixed to the lower portion of the left roller support 38, 39, so that the distance between the sprocket shafts at the time of separation is constant. (See FIGS. 1 and 7).
The receiving roll sprocket 43 is keyed to the sprocket shaft 44, and the sprocket shaft 44 is pivotally supported by a stay 46 extending from the roller frame 23 via a bearing holder 45.
The pull-in roll sprocket 47 is keyed to the sprocket shaft 44 ′, and the sprocket shaft 44 ′ is pivotally supported by the left roller support 38 via a bearing holder 45 ′.
The shaft of the receiving roll 29a and the sprocket shaft 44, and the shaft of the pulling roll 29 and the sprocket shaft 44 'are connected via universal joints 48 and 48', respectively. It will be safe.
The torque limiters 49 and 49 ′ are respectively fixed to shaft ends extending from the cutter shaft 19 and the cutter shaft 22. The torque limiters 49 and 49 'are friction transmission means provided with sprockets 43' and 47 ', and slip when the overload is applied to protect the equipment (see FIG. 5).

The chains 50 and 51 are respectively wound around the sprocket 43 of the receiving roll 29a and the sprocket 47 of the pulling roll 29 (see FIGS. 1 and 5).
The control valve 53 is attached to the side of the roller frame 23, and thereby the forward rotation, reverse rotation, and stop of the feed roller 24 and the biaxial cutter 24 are controlled.
The oil tank 59 is arranged on the front side of the frame 3. The upper portion of the storage bag 55 is supported by being hooked on a bag base 57 provided at the outlet of the shooter 7.

  The hydraulic pressure is supplied to the hydraulic cylinder 42 from the return circuit r of the hydraulic circuit of the power drive system of the system through the pipe 42a, and a relatively low pressure is generated in the hydraulic cylinder 42 by the variable throttle 42b. The pulling roll 29 is attracted by the urging force. When a thick pruned branch is supplied to the feed roller 24 in this state, the pulling roll 29 moves in a direction away from the receiving roll 29a, so that the hydraulic cylinder 42 is extended by that amount. At this time, an attractive force corresponding to the flow resistance by the throttle valve 42 b is applied to the pulling roll 29.

When the input shaft 1 is driven by the PTO shaft of the agricultural tractor, the oil pump 10 is driven via the V pulley (drive V pulley) 4, the V belt 12, and the V pulley (driven V pulley) 11, and the control valve The oil motor 14 is driven via the (switching operation valve) 53. Then, the cutter 17 is driven by the oil motor 14 via the pinion 15 and the gear 16, and the cutter 21 is further driven in the opposite direction via the drive gear 18 and the driven gear 20 (see FIG. 8).
The receiving roll 29a of the feed roller 24 is driven through the torque limiter 49, the chain 50, the sprocket 43, and the universal joint 48 as the cutter shaft 19 rotates, and the drawing roll 29 is driven by the cutter shaft 22, the torque limiter 49 ′, the chain 51, It is driven via a universal joint 48 '.

  The pruning branch w input from the hopper 52 is supplied to the feed roller 24 through the input port 52A, is sandwiched between the receiving roll 29a and the pull-in roll 29 of the feed roller 24, is pushed into the biaxial cutter, and is cut at the back of the cutter ( It is pushed out. The fine pieces fall into the opening at the lower part of the cutter, are sent forward (leftward in FIG. 1) by the screw conveyor 8, are launched by the thrower 5, and are stored in the storage bag 55. When the storage bag is full, remove the bag from the bag base 57 and lower it to the ground. Instead, the empty storage bag 55 is attached to the bag base 57 to continue the pruning branch crushing operation. Can do.

When the thick pruned branch w is put into the hopper 52, the pulling roll 29 tries to separate from the receiving roll 29a while pulling the thick pruning branch w, but is attracted by the hydraulic cylinder 42 and restrained from separating from the receiving roll 29a. Is applied, and a strong vertical splitting force is generated in the vertical splitting blade by this separation suppressing force.
The balance of force at the start of the pulling of the pruned branch w by the feed roller 24 is expressed by the following equation. Where T is the axial torque of the pulling roll, R is the turning radius of the split blade, θ is the contact angle of the pruning branch, F is the tangential force, f1 is the pulling force, and f2 is the splitting force.
F = T / R,
f1 = Fcosθ
f2 = Fsinθ
If the axial torque is constant, as the diameter of the pruned branch increases, the contact angle θ increases, the pulling force f1 decreases, and the longitudinal splitting force f2 increases (see FIG. 13).

  When a relatively thick (40 to 50 mm diameter) pruned branch w is supplied from the hopper, the pruned branch w is thinned by cutting the side portion thereof by the longitudinally split blade 73 provided on the pulling roll 29, or the central portion thereof. And cut vertically. As a result, even a thick pruned branch can be drawn into the biaxial cutter 25 relatively easily, and the shredding resistance of the biaxial cutter is reduced. Further, at this time, since the twigs extending laterally from the pruned branch w are cut by the vertically split blade 73, the pruned branch is smoothly drawn into the biaxial cutter.

  In this embodiment, a biaxial cutter is adopted. However, in the case of using other cutters such as a chopper, a shredder, and a cylinder cutter, a relatively thick pruned branch is thinned by the feed roller 24 or vertically divided. Similarly, the shredding resistance is reduced, so that it is effective to apply the feed roller 24 of the present invention to the pruned branch crushing machine using these cutters.

Since both the drawing roll 29 and the receiving roll 29a of the feed roller 24 have a cylindrical body (in the embodiment, a regular octagonal cross section), the pruning branch escapes to the left and right with respect to the vertically divided blade. For this reason, the cutting action and the longitudinal action of the vertically divided blade are reduced.
When it is desirable to enhance the cutting action and the vertical cutting action by the vertical cutting blade and improve the vertical cutting efficiency, the V-shaped guide groove 75v is formed on the receiving surface of the bar 75 of the receiving roll 29b so as to face the vertical cutting edge 73. What is necessary is just to provide (refer FIG. 14). When the relatively thick pruned branch w is supplied, the pruned branch w is guided to the position opposed to the vertical cutting blade 73 by the guide groove 75v and is held at that position, so that the vertical pruning branch w is surely divided at the center. The blade 73 is cut.

In the above embodiment, the pulling roll 29 provided with sawtooth-shaped pulling teeth and vertical blades is used as a movable roll, which is pulled by the hydraulic cylinder 42, and the receiving roll 29a is used as a fixed roll. Since the receiving roll 29a in this case does not have a blade, an excessively strong force such as a twisting force is not applied. However, since the pulling roll 29 has a retracting tooth and a vertically divided blade, an excessively strong force is repeatedly applied. For this reason, the pull-in roll 29 is more exhausted and therefore requires regular maintenance.
On the other hand, since the receiving roll 29a has no split blades, the twisting force applied thereto is smaller than the twisting force applied to the pulling roll 29, and the receiving roll 29a moves more smoothly than the pulling roll 29.
In consideration of the above circumstances, it is only necessary to select which of the drawing roll 29 and the receiving roll 29a is the movable side. Further, the support mechanism for the movable roll may be a sliding support mechanism in which the bearing is slidably attached to a guide hole 23h provided in the roller frame 23. However, as shown in FIG. It is also possible to provide a swinging support mechanism in which a pivot shaft 80 is provided on the strength member, a swing member 81 is pivotally supported on the strength member, and a bearing 37 of the receiving roll is provided at the lower end of the swing member 81.

(A) is a side view of an Example, (b) is a partially expanded view. These are the top views of an Example. These are the rear views of an Example. These are the top views of the biaxial cutter of an Example. These are top views of the feed roller of an Example. FIG. 6 is a view taken along the line XX in FIG. 5. FIG. 3 is a front view showing the arrangement relationship between a cutter and a drawing roll. Is a hydraulic circuit diagram. (A) is a longitudinal cross-sectional view of a receiving roll, (b) is a side view. (A) is sectional drawing of a drawing-in roll, (b) is a side view. (A) is a perspective view of a drawing roll, (b) is a perspective view of a receiving roll. (A) is a perspective view of a biaxial cutter, (b) is a side view. These are explanatory drawings of the balance relationship of the drawing-in force by a drawing-in roll. FIG. 5 is a cross-sectional view of another example of a receiving roll. FIG. 7 is a side view of another example of a feed roller support mechanism.

Explanation of symbols

1: input shaft 2: bearing 3: frame 4, 11: V pulley 5: thrower 6: casing 7: shooter 8: screw conveyor 10: oil pump 10a: unload valve 12: V belt 13: cutter frame 14: oil motor 15: Motor pinion 16: Gear 17, 21: Cutter 17a, 21a: Teeth 17b, 21b: Groove 18: Drive gear 19, 22: Cutter shaft 20: Gear 23: Roller frame 23h: Guide hole 24: Feed roller 25: Biaxial cutter 26: Swing arm 29: Pull-in roll 29a: Receiving roll 37: Bearing 38: Left roller support 39: Right roller support 40, 40 ': Guide boss 41: Tie bar 42: Hydraulic cylinder 42a: Oil supply line 42b: Variable Apertures 43, 47: Sprockets 48, 48 ': Universal joint 4 , 49 ': torque limiter
50, 51: Chain 52: Hopper 52A: Loading port 53: Control valve 55: Storage bag 57: Bag base 59: Oil tank 71: Cylindrical main body 72, 72a: Retraction tooth 73: Vertically divided blade 74: Cylindrical main body 75 : Bar 75v: V-shaped guide groove 76: Groove
75v: guide groove 80: pivot shaft 81: swing member w: pruned branch

Claims (5)

A pruning branch crusher that feeds a pruned branch into a cutter and chops it between feed rollers,
A feed roller with a pair of rolls is interposed between the cutter and the hopper,
The bearing of one roll of the pair of rolls is fixed to the roller frame, the bearing of the other roll is movably attached to the roller frame, and the movable bearing is substantially constant toward the other fixed bearing by the biasing means. Is attracted by the force of
A longitudinal blade is provided on the outer peripheral surface of one of the pair of rolls of the feed roller at an interval in the axial direction,
A number of the above-mentioned split blades are provided at intervals in the circumferential direction of the roll,
A pruned branch crushing machine configured to feed a pruned branch between the pair of rolls to the cutter, and to make a vertical split in the pruned branch by a vertical cutting blade of the roll during the feeding operation.   One of the pair of rolls of the feed roller is a pull-in roll provided with a sawtooth feed dog parallel to the axis on the outer peripheral surface, and the other roll is provided with a groove parallel to the axis on the outer periphery at equal intervals. The pruned branch crusher according to claim 1, which is a receiving roll.   The pruned branch crusher according to claim 1, wherein the blades of the vertically divided blades of the drawing roll are fan-shaped, and a plurality of the fan-shaped blades are provided at regular intervals in the roll circumferential direction.   2. The pruned branch crusher according to claim 1, wherein the receiving roll has a plurality of square-shaped streaks extending in the longitudinal direction on its outer periphery at equal intervals, and a concave streak groove between the streaks. .   2. The pruned branch crusher according to claim 1, wherein the urging means is a hydraulic cylinder, and a substantially constant urging force thereof is hydraulically maintained by a throttle valve of a hydraulic circuit connected to the hydraulic cylinder.

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