WO2019155634A1

WO2019155634A1 - Pressing force switching mechanism for rotation feeding part of pulverizer, pulverizer provided with same, and pressing force switching method for rotation feeding part of pulverizer

Info

Publication number: WO2019155634A1
Application number: PCT/JP2018/004718
Authority: WO
Inventors: 紫原　真一
Original assignee: 株式会社大橋
Priority date: 2018-02-09
Filing date: 2018-02-09
Publication date: 2019-08-15
Also published as: JPWO2019155634A1; EP3584048A4; JP6487610B1; EP3584048A1

Abstract

[Problem] To provide a pressing force switching mechanism for a rotation feeding part of a pulverizer that makes it possible to easily extract an object to be pulverized when the object to be pulverized, such as timber, has become clogged in a pulverizing part. [Solution] A pressing force switching mechanism 4 provided with: a feeding tooth roller 33 that presses and feeds an object to be pulverized to a pulverizing part; a toggle member 40 that has a toggle point, is operable in two directions bounded at the toggle point, serves as a fixed end on one lock direction side, serves as a free end on the other free direction side, and has a hook pin 403 having different positions when fitted in the respective directions; a tensile spring 42 that is laid between an arm board 30 and the hook pin 403 of the toggle member 40, causes the toggle member 40 to operate in the two directions, and applies a pressing force to the feeding tooth roller 33 in the direction of a bottom plate 210 when the toggle member 40 operates toward the lock direction side and serves as the fixed end; and a pressing force switching lever 49 that acts on the toggle member 40 to switch the toggle member 40 in the two directions bounded at the toggle point.

Description

Pushing force switching mechanism of rotating feed part of pulverizer, pulverizer equipped with the same, and method of switching pushing force of rotating feed part of pulverizer

The present invention relates to a pressing force switching mechanism for a rotary feed portion of a pulverizer, a pulverizer equipped with the mechanism, and a pressing force switching method for a rotary feed portion of the pulverizer. More specifically, the present invention relates to a material that can be easily taken out when an object to be pulverized such as a tree is clogged in a pulverized portion.

In recent years, in addition to thinned wood, most of the wood waste produced by cutting and pruning roadside trees and garden trees has been used as woody biomass fuel. In order to produce this woody biomass fuel, it is necessary to crush the wood waste material into chips. As a pulverizer for pulverizing wood waste materials, for example, there is a tree pulverizer described in Patent Document 1.

The conventional tree crusher described in Patent Document 1 can easily collect the crushed chips by moving them far away. In addition, the feed roller that the tree crusher has to press and hold the object to be crushed while pressing the object to be crushed downward is arbitrarily switched to the direction in which the object to be crushed is pressed against the crushing rotor or vice versa, and is rotationally driven. (Description of paragraph [0019] of Patent Document 1).

JP 2014-58044 A

However, the conventional tree crusher has the following problems.
In other words, if the work is stagnant due to clogged material near the feed roller, etc., opening the upper cover that forms the rotor chamber exposes the crushing rotor and the rotor chamber wall so that the work to remove the material to be crushed Can be easily performed (described in paragraphs [0033] and [0034] of Patent Document 1).

On the other hand, during the pulverization operation by the tree pulverizer, in order to surely feed the object to be pulverized to the pulverization rotor, the feed roller requires a considerably strong holding force, that is, a pressing force. For this reason, even if the upper cover is opened and the pulverization rotor and the rotor inner wall are largely exposed as described above, the feeding roller strongly holds the object to be pulverized, so that it cannot be easily taken out. Therefore, the time loss until the work is resumed is large, and the work efficiency is poor.

In addition, when performing the above-described configuration, that is, the configuration in which the feed roller is rotatable in the forward and reverse directions, and performing the reversal of the feed roller holding the clogged material to be ground, the tree that is the material to be ground However, there is a danger of jumping out to the rear of the crusher, which is a place where an operator works, and there is a problem in safety.

The present invention was devised in view of the above points, and is a rotary feed section of a pulverizer that can easily take out a pulverized object when the pulverized object such as a tree is clogged in the pulverizing part. It is an object of the present invention to provide a pressing force switching mechanism, a pulverizer equipped with the pressing force switching mechanism, and a pressing force switching method for a rotary feed portion of the pulverizer.

(1) In order to achieve the above-mentioned object, the present invention is a rotary feed unit that is attached to a movable body, can advance and retreat in the direction of a feed surface on which the object to be crushed is placed, and presses the object to be crushed and sends it to the pulverization unit It is provided with a thought point in the movable direction, and can be operated in two directions with the thought point as a boundary.One of the two directions is a fixed end, and the other free direction is a free end. It is hung between a thought member having a hanging portion having a different position in the direction-contained state, the movable body, and the hanging portion of the thought member, and the thought member is moved in two directions with a thought point as a boundary. A biasing body that applies a pressing force in the direction of the feed surface to the feed rotating body by acting on the lock direction side of the thought member and acting on the thought member, The member is bounded by the thought point A pushing force switching mechanism of the rotary feed section of the crusher and a switching means for switching the direction.

The pressing force switching mechanism of the rotary feed part of the pulverizer is attached to the movable body, can move forward and backward in the direction of the feed surface on which the object to be crushed is placed, and includes a rotation feed part that presses the object to be crushed and sends it to the pulverization part. The rotary feed unit can be pressed against a material to be crushed such as a tree and rotated to feed the material to be crushed along the feed surface to the pulverization unit. Thereby, a to-be-ground material can be continuously pulverized by the pulverization unit.

The pressing force switching mechanism has a thought point in the movable direction and can be operated in two directions with the thought point as a boundary.It is a fixed end on one of the two directions and a free end on the other free direction side. In addition, it is possible to clearly switch between the lock direction side and the free direction side of the thought member with the thought point as a boundary by providing the thought member having the hanging portion whose position in the retracted state in each direction is different. Become.

Also, it is hung between the movable body and the hanging portion of the thought member, and the thought member is moved in two directions with the thought point as a boundary, and the thought member is moved to the lock direction side to become a fixed end. And an urging body for applying a pressing force in the feed surface direction to the feed rotating body. As a result, when the imaginary member is on the lock direction side, the hooking portion that hangs the urging body becomes the fixed end, and the urging force of the urging body acts sufficiently to secure the pressing force in the feed surface direction of the feed rotating body. Thus, the object to be crushed can be pressed.

Furthermore, when the imaginary member is on the free direction side, the urging portion that hangs the urging body becomes a free end, so that the urging force of the urging body does not act, and the pushing force in the feed surface direction of the feed rotator becomes loose. The pressing force that holds the object to be crushed is also relaxed and weakened.

In addition, the pressing force switching mechanism includes switching means that acts on the thought member and switches the thought member in two directions with the thought point as a boundary. Therefore, the operation of the switching means moves the thought member to the lock direction side. Thus, an operation for operating the urging body and an operation for reducing the urging force of the urging body by moving in the free direction side can be performed.

It should be noted that the term “thought point” in the claims and this specification does not know in which direction the thought member rotates when it is pulled by an urging body such as a spring. Used to include a point (dead point).

(2) The present invention may have a configuration in which the movable body has a plurality of arm boards that are pivotally supported so that a part of the movable body can be pivoted, and the rotary feeding section is attached between the arm boards. Good.

In this case, by rotating a plurality of arm boards, the rotary feed unit can be advanced and retracted in the direction of the feed surface, whereby the rotary feed unit is pressed against the object to be crushed on the feed surface, The pressing force (pressing force) can be released (or released).
In addition, since the rotary feed part is passed to a plurality of arm panels, the rotary feed part is structurally reinforced with the movable body including the arm panel, so that rigidity is increased and a large load acts on the work as the movable body. Even more accurate movement is possible.

(3) In the present invention, the switching means includes a thought point in the movable direction, and the thought member is switched by an operation in two directions with the thought point as a boundary, and this operation is assisted by a biasing force. It is good also as a structure to be made.

In this case, for example, in the input position of the pressing force switching mechanism, maintenance of the input position can be assisted by the urging force when the switching means exceeds the thought point. Further, at the cut position, the switching means exceeds the thought point, so that the maintenance of the cut position can be assisted by the biasing force.

(4) In order to achieve the above object, the present invention provides a chassis, a pulverizing device provided on the chassis and pulverizing an object to be crushed, such as a tree, and a feed surface on which the object to be crushed is mounted. The rotary feed part that presses the object to be crushed and feeds it to the grinding part, has a thought point in the movable direction, can operate in two directions with the thought point as a boundary, and locks one of the two directions Between the imaginary member, the movable body, and the suspending portion of the imaginary member, which is a fixed end on the direction side and a free end on the other free direction side, and has a suspending portion whose position in each direction is different. The thought member is moved in two directions with a thought point as a boundary, and the thought member is moved to the lock direction side to become a fixed end, whereby the feed rotating body is moved in the feed surface direction. An urging body for applying a pressing force, And a pressing force switching mechanism for the rotary feed portion of the crusher having switching means for switching the thought member in two directions with the thought point as a boundary. A crusher equipped with a force switching mechanism.

The pulverizer can pulverize the material to be pulverized, which is sent to the pulverization unit by the rotary feed unit, by a pulverization device provided on the chassis. If the pulverizer (pulverizer) stops for some reason during the pulverization operation, for example, the object to be pulverized is too thick, the push force switching mechanism is moved from the set position to the off position as described above. This can be dealt with by reducing the pressing force on the object to be crushed by the rotary feed unit.

(5) In the present invention, the switching means includes a thought point in the movable direction, and the thought member is switched by an operation in two directions with the thought point as a boundary, and this operation is assisted by a biasing force. It is good also as a structure to be made.

(6) In order to achieve the above object, the present invention is configured to move a thinking member having a thought point in the movable direction to the lock direction side of the two directions having the thought point as a boundary by the switching means. The rotating member is pulled in the direction of the object to be crushed by an urging member that is fixed between the fixed part and the bridge part. Of the crusher, which moves to the free direction side of the two directions bounded by the thought point to make the hanging portion a free end, and loosens the urging force of the urging body that draws in the direction of the object to be crushed. This is a pressing force switching method for the rotary feed unit.

According to the pressing force switching method of the rotary feed part of the pulverizer, it is possible to clearly switch the thought member with the thought point as a boundary by the switching means on the lock direction side and the free direction side. That is, when the imaginary member is on the lock direction side, the hook portion that hangs the urging body serves as a fixed end, and the urging force of the urging body acts sufficiently to secure the pressing force in the feed surface direction of the feed rotating body. It is possible to hold the object to be crushed. In addition, when the thought member is on the free direction side, the urging portion on which the urging body is applied becomes a free end, so that the urging force of the urging body does not act, and the pushing force in the feed surface direction of the feed rotating body is loosened. The pressing force that holds the object to be crushed is also relaxed and weakened.

(7) The present invention may be configured such that the switching means includes a thought point in the movable direction, and the thought member is switched by an operation in two directions assisted by a biasing force with the thought point as a boundary.

In this case, when the switching means exceeds the thought point, the maintenance of the position of the thought member in the entering position can be assisted by the biasing force. Further, when the switching means exceeds the thought point, maintenance of the position of the thought member in the cut position can be assisted by the biasing force.

The present invention relates to a pressing force switching mechanism for a rotary feed portion of a pulverizer capable of easily taking out the pulverized material when the pulverized material such as a tree is clogged in the pulverized portion, and a pulverizer and a pulverizer equipped therewith It is possible to provide a method for switching the pressing force of the rotary feed portion of the machine.

It is side view explanatory drawing which shows one Embodiment of the grinder which concerns on this invention. It is upper surface explanatory drawing of the grinder shown in FIG. It is rear surface explanatory drawing of the grinder shown in FIG. It is a perspective explanatory view showing one embodiment of a pushing force change mechanism of a rotation sending part concerning the present invention. It is explanatory drawing which shows the set state before the grinding | pulverization operation | work start of a grinder. It is explanatory drawing which shows the state which the grinding | pulverization blade bite into the tree during the grinding | pulverization operation | work of a tree, and the grinder stopped. It is explanatory drawing which shows the state which released the set state of the pushing force switching mechanism of a rotation feed part by operating a pushing force switching lever to the cutting position direction, and relieved pushing force. It is explanatory drawing which shows the state which operates the pushing force release lever, releases the pushing force of a rotation feeding part, and has taken out the tree. It is explanatory drawing made into the state which returned the pushing force release lever after taking out a tree. It is explanatory drawing which shows the state which has started pushing the spring hook arm to a locking direction by operating a pushing force switching lever to the direction of an entrance position.

The embodiment of the present invention will be described in more detail with reference to FIGS. In the following description, the terms “front, rear” and “left, right” may be used to express the direction and location in an easy-to-understand manner. Among these, “front (direction)” is a side where a pulverizing apparatus 2 described later in FIG. 1 is provided, and “rear (direction)” is a side where a handle 12 described later is provided in FIG. is there. “Left (direction)” is the left side in FIG. 3, and “Right (direction)” is the right side in FIG.

The pulverizer A has a chassis 1. The chassis 1 has a prime mover 10, a crawler 11 driven by the prime mover 10, and a handle 12 for traveling operation. Further, on the chassis 1, a pulverizing device 2 for pulverizing an object to be crushed, such as a tree, a feeding device 3 for feeding the object to be crushed into the pulverizing device 2, and a pressing force for switching the pressing force on the object to be crushed by the feeding device 3. A switching mechanism 4 is provided.

Hereinafter, each part will be described in detail. The chassis 1, the prime mover 10, the crawler 11, and the handle 12 have a general configuration in a pulverizer, so that the above description is not repeated and detailed description is omitted.

(Crushing device 2)
The pulverizing apparatus 2 has a casing 20. The casing 20 has a supply port 200 on the supply side (right side in FIG. 1) of the object to be crushed (see FIG. 6 and the like). A so-called trumpet-shaped supply duct 21 slightly constricted on the supply port 200 side is connected to the supply port 200. The upper surface of the bottom plate 210 that is the feeding surface of the supply duct 21 is inclined downward toward the supply port 200 at a required angle.

The supply duct 21 shown in FIGS. 1 to 3 is a Japanese specification and is not shown in the European specification. However, the supply duct 21 has a longer distance from the inlet on the working unit side to the supply port 200. A supply duct is employed.

In the casing 20, a partition member 22 that forms a pulverization space 25 is provided at the upper front side of the casing 20. Moreover, the casing 20 is provided with the upper cover 29 which can open and close an upper opening part (refer FIG. 4). By opening the upper lid 29, it becomes possible to perform maintenance of the grinding rotor 23 described later.

In the grinding space 25, a grinding rotor 23 is rotatably provided. The crushing rotor 23 is pivotally supported so as to be bridged between the side plates 201 of the casing 20 with the direction of the rotating shaft 230 as a horizontal direction and a horizontal direction. The crushing rotor 23 is belt-driven by the rotating shaft 101 (see FIG. 2) of the prime mover 10. Note that the front portion of the casing 20 is open, and the crushed material can be discharged through the screen 26 attached to the opening (reference number omitted).

The crushing rotor 23 has crushing blades 24 extending over the entire width at two locations in the circumferential direction of the rotating body 231 fixed to the rotating shaft 230. Each crushing blade 24 is provided such that the blade edge (reference numeral omitted) is parallel to the rotation shaft 230. Further, the rotation direction of the crushing rotor 23 is a clockwise direction in FIG. 1, and the pulverized product is sprayed toward the partition member 22 below. And the rear part side (supply port 200 side) of the grinding | pulverization rotor 23 becomes a grinding | pulverization part which grind | pulverizes a to-be-ground material.

(Feeding device 3)
A feeding device 3 is provided on the upper side of the rear portion of the casing 20. The feeding device 3 has a substantially square arm board 30 disposed on the outside of each side plate 201. Each arm board 30 constitutes a movable body, and the upper part on the rear side is pivotally supported by the shaft rod 31 so as to be vertically rotatable with respect to each side plate 201. In addition, a feed dog roller 33 that is a feed rotating body is pivotally supported between the lower portions on the front side of each arm board 30 via a bearing 32 so as to be rotationally driven (see FIG. 4).

The feed dog roller 33 has a structure in which feed dogs 331 are provided at equal intervals in five locations in the circumferential direction of the rotary shaft 330. Each feed dog 331 has a radial intermediate portion bent at the same angle in the rotation direction. Yes. Further, chevron teeth are continuously formed on the tip of each feed dog 331 (see FIG. 2). The feed dog roller 33 is interlocked with the grinding rotor 23 through an electromagnetic clutch 35 that rotates together with the grinding rotor 23 (see FIG. 2). When the electromagnetic clutch 35 is connected, the feed dog roller 33 rotates in the feed direction (right rotation direction in FIG. 1) via a power transmission mechanism (not shown), and when the electromagnetic clutch 35 is turned off, the feed dog roller 33 is braked. Is applied and rotation stops.

Further, each side plate 201 of the casing 20 is formed with a long hole 202 for allowing the rotation shaft 330 to pass therethrough. Each elongated hole 202 is formed so as to draw an arc centered on the shaft rod 31, and moves the feed dog roller 33 up and down, that is, moves in a direction toward and away from the object to be crushed sent to the pulverization unit. This is possible (see FIG. 4).

The feed dog roller 33 stops moving when the rear end portion of each arm board 30 hits an adjusting bolt 380 that is screwed back and forth with the receiving bracket 38 shown in FIG. Yes. This stop position can be adjusted by turning the adjusting bolt 380. In the stop state, the rotation locus of the tip of each feed dog 31 of the feed dog roller 33 is set to be slightly separated from the upper surface of the partition member 22 so as not to hinder the rotation.

A stabilizer 36 is bridged between the arm boards 30 so that the arm boards 30 are connected. The stabilizer 36 ensures the rigidity of the structure composed of each arm board 30 and the feed dog roller 33. A pressing force release lever 37 is pivotally supported at the upper rear end near the left end of the casing 20 via a shaft rod 370 so as to be rotatable. The pushing force release lever 37 is not urged, and normally passes under the stabilizer 36 and falls forward due to its own weight.

(Pressing force switching mechanism 4)
A pressing force switching mechanism 4 is provided below the arm panel 30 on the side plates 201 on the left and right sides of the casing 20 (the front side and the back side in FIGS. 1 and 4). Of the pressing force switching mechanism 4, a spring hook arm 40, a tension spring 42, a switching arm plate 46, etc., which will be described later, have a symmetrical structure on the left and right sides, so only the left side structure shown in the following description will be described. For the right side structure, this description is used and the description is omitted.
The pressing force switching mechanism 4 includes a spring hook arm 40 that is a thought member that is pivotally supported on the side plate 201 by a shaft rod 41. The spring hook arm 40 is formed with a pointed tip, and inclined edges on both sides serve as an abutting contact portion 401 and a notch contacting portion 402.

A hook pin 403 that is a hanging portion is provided on the outer surface near the tip of the spring hook arm 40. A spring hook 34 is provided at the lower corner of the front side of the arm board 30, and a tension spring 42, which is an urging member, is hooked between the spring hook 34 and the hook pin 403 with a required tensile force. ing. Further, the spring hook arm 40 is configured to stop by hitting a stopper 203 provided on the side plate 201 at the entry position shown in FIG. The stopper 203 is provided with a synthetic resin collar (not shown) for buffering.

Note that the spring hook arm 40 has either a biasing force of the tension spring 42, with an angle at which the center line of the tension spring 42 overlaps the hook pin 403 and the shaft rod 41 at the same time (an angle at which the tension spring 42 extends most). It is a structure that works in the direction of turning. The spring hook arm 40 and the tension spring 42 constitute a link mechanism (an irregular link mechanism in the sense that one link is a spring that expands and contracts). In the above-mentioned entry position, when the spring hook arm 40 is slightly pulled in the upward rotation direction beyond the thought point, it hits the stopper 203 and is fixed (locked) by the urging force of the tension spring 42.

A shaft support piece 43 is provided on the rear edge of the left side plate 201 of the casing 20. Further, on the left side of the side plate 201, a support piece 44 is erected on the base 100 of the chassis 1 at a required distance from the side plate 201. A drive shaft 45 is pivotally supported between the upper portion of the support piece 44 and the shaft support piece 43 via a bearing (reference number omitted) in a horizontal and horizontal direction. Near the shaft support piece 43 of the drive shaft 45, a switching arm plate 46, which is substantially L-shaped and constitutes a switching means together with a pressing force switching lever 49, an adjusting member 47, a tension spring 48, etc., which will be described later, is formed at the corner. It is attached by passing through the drive shaft 45 and fixing.

The switching arm plate 46 has a receiving arm 461 (front side in FIG. 4) and a cutting arm 462 (rear side in FIG. 4), and a roller 460 that touches the spring hook arm 40 is provided at the tip of each arm. Yes. One end portion of a substantially U-shaped adjusting member 47 is attached to the outer edge of the cutting arm 462 near the front portion via a pin 463 so as to be rotatable in the vertical direction. A tension spring 48 is applied with a required tension between the other end of the adjustment member 47 and a spring hook 480 provided at the lower end of the side plate 201.

A pressing force switching lever 49 is fixed to the outer end of the drive shaft 45. The direction of the pressing force switching lever 49 is set so as to substantially overlap the projection direction parallel to the drive shaft 45 of the roller 460 of the cutting arm 462 (see FIG. 5 and the like). Further, in the configuration including the drive shaft 45, the switching arm plate 46, the adjusting member 47, the tension spring 48, and the pressing force switching lever 49, a thought point is set.

That is, considering the angle at which the center line of the tension spring 48 overlaps the drive shaft 45 and the pin 463 at the same time (the angle at which the tension spring 48 extends most), the tension force of the tension spring 48 changes to the switching arm plate 46. It is a structure that works well in the direction of rotation. The cut arm 462, the tension spring 48, and the adjustment member 47 constitute a link mechanism (an irregular link mechanism in the sense that one link includes a spring that expands and contracts). In other words, at the entrance position shown in FIG. 5, the above configuration exceeds the thought point, and the switching arm plate 46 is urged clockwise in FIG. 5 to assist the maintenance of the entrance position.

Further, in the cut position shown in FIG. 7, the entry arm 461 stops by hitting the stopper 204 provided on the side plate 201, and the above configuration exceeds the point of thinking in the direction opposite to the entry position, and the switching arm plate 46 is moved to the position shown in FIG. The power is urged counterclockwise to assist in maintaining the off position. The spring hook arm 40 rotates beyond the thought point in the direction opposite to the entry position, and is in a free state up to the point where it hits the stopper 205 provided on the side plate 201. Note that the U-shape of the adjustment member 47 is a shape for avoiding interference (or contact) by avoiding the drive shaft 45 during movement by allowing the curved portion to escape in advance.

(Function)
The operation of the pulverizer A will be described with reference to FIGS. 1 to 10 (mainly the movement of each part is FIGS. 5 to 10).

(1) The pulverizer A is set as follows before starting the pulverization work of the tree W which is the object to be crushed. First, the pressing force switching lever 49 is in the in-position, so that the spring hook arm 40 is stopped by striking the stopper 203 with the urging force of the tension spring 42 beyond the thought point toward the lock direction. Further, each arm board 30 is rotated downward by the urging force of the tension spring 42, whereby the feed dog roller 33 is lowered until the feed dog 331 hits the partition member 22 (see FIG. 5). In this state, a tensile force is acting on the tension spring 42. Further, the electromagnetic clutch 35 is disconnected, and the feed dog roller 33 is braked so as not to rotate.

(2) When starting the grinding operation of the tree W, the prime mover 10 is driven from the state shown in FIG. A tree W to be crushed is prepared, the electromagnetic clutch 35 is connected, and the feed dog roller 33 is rotated in the feed direction (clockwise direction in FIG. 6). Subsequently, when the tree W is sequentially pushed toward the feed dog roller 33, the feed dog 331 of the rotating feed dog roller 33 bites into the tree W, and feeds the tree W to the supply port 200 along the upper surface of the bottom plate 210. Thereby, the tree W is crushed by the crushing rotor 23 which is a crushing part. Similarly, by sequentially adding and supplying the trees W, the crushing operation can be performed continuously.

During the pulverization operation, when the pulverizing blade 24 bites into the tree W for some reason, for example, the tree W is too thick, and the pulverizer A stops (see FIG. 6), or before the pulverizer A stops. If the branch of the tree W to be supplied spreads out and it becomes difficult to send it to the supply port 200 due to the branches and leaves, the following measures are taken.

(3) As in the latter case, when the pulling amount of the tension spring 42 is small and the pressing force by the feed dog roller 33 on the tree W is not so large, first, the pressing force release lever 37 is rotated backward. When the feed dog roller 33 moves away from the tree W by this operation, the tree W is taken out in that state. When the pulling amount of the tension spring 42 is large and this operation cannot be performed, the pressing force release lever 37 is returned to the original position, and then the pressing force switching lever 49 is rotated in the direction of the cutting position (forward direction). .

With the rotation by this operation, the switching arm plate 46 also rotates in the same direction, the roller 460 of the cutting arm 462 hits the cutting contact portion 402 of the spring hook arm 40, and the spring hook arm 40 is further pushed to be considered. Is greatly rotated in the opposite direction to the above (see FIG. 7).

Further, the spring hook arm 40 switches to the free direction side beyond the thought point, and the urging force of the tension spring 42 is almost released. As a result, the pressing force of the feed dog roller 33 against the tree W is relaxed and weakened, and the initial set state is released. When the pin 463 exceeds the thought point, the switching arm plate 46 is urged counterclockwise in FIG. 7, and the cut position is maintained.

(4) In the state of FIG. 7, since the pressing force of the feed dog roller 33 is still acting on the tree W, the pressing force is released before the tree W is taken out. That is, when the pushing force release lever 37 is rotated backward and the portion near the base is hooked on the stabilizer 36 to raise the feed dog roller 33, the spring hook arm 40 hits the stopper 205 and stops. From this state, when the pressing force release lever 37 is further rotated backward as indicated by a virtual line, the tension spring 42 is further extended, and the pressing force of the feed dog roller 33 can be released. Thereby, the tree W clogged in the crushing part can be taken out easily and safely (see FIG. 8).

Thus, in the above-mentioned cut position, the position of the hook pin 403 on which the base end of the tension spring 42 is hung is close to the spring hook 34, and the pulling amount by the tension spring 42 becomes sufficiently small. Operation is also easy with a relatively light force.

(5) After the tree W is taken out, when the pushing force release lever 37 is rotated forward and returned to the base, the support of the stabilizer 36 by the pushing force release lever 37 is released, and each arm panel 30 is under its own weight. It turns downward and stops when it hits the adjusting bolt 380. Further, the spring hook arm 40 rotates in a direction returning downward while being pushed by the tension spring 42, and stops on the free direction side where it does not reach the thought point (see FIG. 9).

(6) After the tree W is taken out, it is necessary to return the crusher A to the original set state shown in FIG. 5 so that the crushing operation can be resumed. At that time, from the state shown in FIG. 9, the pressing force switching lever 49 is operated in the direction of the entry position (rearward direction). With the rotation by this operation, the switching arm plate 46 is also rotated in the same direction, and the roller 460 of the entry arm 461 hits the entry contact portion 401 of the spring hook arm 40 (see FIG. 10).

When the spring hook arm 40 is further pushed by the roller 460 of the entry arm 461, the spring hook arm 40 rotates in the locking direction beyond the thought point and stops in a state where it hits the stopper 203. As a result, the pressing force switching mechanism 4 of the pulverizer A can be returned to the original set state shown in FIG. 5, and thereafter, the pulverization operation can be continued generally in the above procedures (1) to (2). .

The terms and expressions used in the present specification and claims are for illustrative purposes only, and are not intended to be limiting in any way. The features described in the present specification and claims and their There is no intention of excluding some equivalent terms and expressions. It goes without saying that various modifications are possible within the scope of the technical idea of the present invention.

A grinder 1 chassis 100 base 10 prime mover 101 rotating shaft 11 crawler 12 handle 2 grinding device 20 casing 200 supply port 201 side plate 202 oblong hole 203 stopper 204 stopper 205 stopper 21 supply duct 210 bottom plate 22 partition member 23 grinding rotor 230 rotating shaft 231 Rotating body 24 Crushing blade 25 Crushing space 26 Screen 29 Upper lid 3 Feeder 30 Arm panel 31 Axle rod 32 Bearing 33 Feed dog roller 330 Rotating shaft 331 Feed dog 34 Spring hook 35 Electromagnetic clutch 36 Stabilizer 37 Pushing force release lever 370 Shaft rod 38 Bracket 380 Adjusting bolt 4 Pushing force switching mechanism 40 Spring hook arm 401 Incoming contact portion 402 Not in contact portion 403 Hook pin 41 Axle rod 42 Tension spring 43 Axial support piece 44 Supporting piece 45 Drive shaft 46 Switching arm 460 Roller 461 ON arm 462 off arm 463 pin 47 adjusting member 48 tension spring 480 spring hook 49 pushing force switching lever W Trees

Claims

A rotary feed unit attached to the movable body, capable of moving back and forth in the direction of the feed surface on which the object to be crushed is placed, and holding the object to be crushed and feeding it to the pulverization unit
It is provided with a thought point in the movable direction, and can be operated in two directions with the thought point as a boundary.One of the two directions is a fixed end, and the other free direction is a free end. A thought member having a hanging portion with a different position in the direction-contained state;
It is hung between the movable body and the hanging portion of the thought member, and the thought member is moved in two directions with a thought point as a boundary, and becomes a fixed end by the movement of the thought member toward the lock direction. A biasing body for applying a pressing force in the direction of the feed surface to the feed rotating body,
A pressing force switching mechanism for a rotational feed portion of a crusher, comprising: switching means that acts on the thought member and switches the thought member in two directions with the thought point as a boundary.
The rotary feed of a pulverizer according to claim 1, wherein the movable body has a plurality of arm boards pivotally supported by a part of the movable board, and the rotary feed section is attached between the arm boards. Part pressing force switching mechanism.
The switching means includes a thought point in a movable direction, and the thought member is switched by an operation in two directions with the thought point as a boundary, and this operation is assisted by a biasing force. A pressing force switching mechanism for a rotary feed portion of the pulverizer.
The chassis,
A crusher provided on the chassis and crushing a material to be crushed such as a tree;
A rotary feed unit that is attached to a movable body and can move forward and backward in the direction of the feed surface on which the object to be crushed is placed, and that feeds the pulverized object to the pulverization unit. A thought member having a hanging portion that is a fixed end on one lock direction side of the two directions and a free end on the other free direction side, and has a different position in a retracted state in each direction, It is hung between the movable body and the hanging part of the thought member, and the thought member is moved in two directions with a thought point as a boundary, and becomes a fixed end by the movement of the thought member toward the lock direction. The biasing body for applying a pressing force in the direction of the feeding surface to the feed rotating body, and a switching means that acts on the thought member and switches the thought member in two directions with the thought point as a boundary. Crusher times transfer And a pushing force switching mechanism parts,
A crusher equipped with a pressing force switching mechanism for a rotary feed section of a crusher.
The said switching means is provided with a thought point in a movable direction, It is made to switch the said thought member by the operation | movement to two directions which make this boundary a boundary, This operation | movement is assisted by urging | biasing force. A crusher equipped with a pressing force switching mechanism for a rotary feed section of a crusher.
The urging member hung between the suspending portion with the suspending portion as the fixed end by moving the imaginary member having the wondering point in the movable direction to the lock direction side of the two directions bounded by the wondering point by the switching means. When the object to be crushed is pulled in the direction of the object to be crushed by the body, and the object to be crushed is clogged in the pulverizing part, the thought member is moved to the free direction side of the two directions with the thought point as a boundary by the switching means. A method of switching the pressing force of the rotary feed portion of the pulverizer, wherein the urging force of the rotary feed portion drawn by the biasing body in the direction of the object to be crushed is loosened.
The rotation means of the rotation feeding part of the pulverizer according to claim 6, wherein the switching means includes a thought point in a movable direction, and switches the thought member by an operation in two directions assisted by a biasing force with the thought point as a boundary. Pushing force switching method.