JP4451375B2 - Wood crusher and tensioning mechanism - Google Patents

Description

  The present invention relates to a wood crushing apparatus and a tension applying mechanism for supplying and crushing wood to a crushing part while rotating a tab into which wood is fed via a chain, a belt, or the like.

  Conventionally, as a wood crushing device for crushing wood, a self-propelled wood crushing device (wood crushing machine) has been used (see Patent Document 1).

  This self-propelled wood crusher includes, as main components, a rotary crusher (crush body) and a tab (rotary tab) that rotates around a rotating shaft and supplies wood to the crusher. Yes. A hopper is attached to the top of the tab, and wood is supplied into the tab by putting wood into the hopper. The wood crushed in the crusher is supplied to the lower side of the crusher and discharged to the outside by the transport conveyor.

The tab is rotationally driven via a tab rotating device. The tab rotating device includes a friction member formed by a rubber body provided along the outer peripheral surface of the tab, a chain (belt) wound around the friction member, and a hydraulic motor that rotationally drives the chain. Contains. An idler to which a tensile force is applied by a spring member abuts on the outer surface of the chain and applies tension to the chain.
JP 2005-131515 A (published May 26, 2005)

  However, the conventional wood crushing apparatus has the following problems.

  In other words, in the wood crushing device disclosed in the above publication, a side where the tension of the chain is increased and a side where the tension is reduced are formed on both sides of the drive source when reversing. At this time, if the tension applying mechanism is arranged on the side where the chain tension is increased, the amount of extension of the spring included in the tension applying mechanism is increased, and the chain is moved on the opposite side of the drive source where the chain tension is reduced. There is a possibility that problems such as loosening and dropping of the chain from the tab or idling may occur.

  An object of the present invention is to provide a wood crushing device and a tension applying mechanism capable of preventing a strip (chain, belt, etc.) from dropping off and a tab from rotating freely even when the forward and reverse rotation of the tab is repeated. It is in.

The wood crushing apparatus according to the first invention includes a crushing part, a tab, a belt, a driving part, and a tension applying mechanism. The crushing unit crushes the wood to be crushed. The tab supplies wood to the crushing part while rotating around the rotation axis above the crushing part. The band is wound so as to contact the outer periphery of the tab. The drive unit rotates the tab in the forward direction or the reverse direction by rotating the belt. The tension applying mechanism is arranged close to the downstream side of the drive unit when the tab rotates in the forward rotation direction, and one end of the tension applying mechanism moves along the band according to the amount of tension applied to the band when the tab rotates. a mechanism for giving a tension to Nagato band member has an elastic member, and a regulating portion. The elastic member is provided to apply tension to the band. When the rotation direction of the tab switches from the forward rotation direction to the reverse rotation direction , the restricting portion changes the elasticity when the tension applied to the belt body changes and one end of the tension applying mechanism moves along the belt body. The amount of expansion / contraction of the member is restricted to a predetermined amount or more.

  Here, in a wood crushing apparatus that rotates by winding a belt around the outer periphery of the tab, a predetermined amount of an elastic member such as a spring that applies tension to the belt wound around the outer periphery of the tab The tension applying mechanism is provided with a regulating portion that regulates the amount of expansion and contraction described above.

  Here, the tension applying mechanism is, for example, an elastic spring or the like so that a chain, a belt or the like wound around the tab is gradually stretched by a load applied during use and a part of the belt body is not loosened. This is a mechanism that constantly applies an appropriate tension to the band by pulling a part of the band by the elastic force of the member. The elastic member included in the tension applying mechanism includes, for example, a member such as a spring, and may have a structure that expands or contracts when tension is applied to the belt. It may be.

  Normally, in this tension application mechanism, for example, when the drive unit supplies wood to the crushing unit while repeating forward and reverse rotation of the tab, when the tab is reversed, the tension application mechanism is provided when viewed from the drive unit. Even if the tension applied to the belt on the other side becomes excessive, only the elastic force of an elastic member such as a spring is used. For this reason, as a result of the expansion and contraction of the elastic member, the tension applied to the belt on the side opposite to the side where the tension applying mechanism is provided as viewed from the drive unit becomes smaller than necessary, and from the outer periphery of the tab. There is a risk of troubles such as the belt dropping off or spinning around.

  In the wood crushing apparatus of the present invention, the tension applying mechanism is provided with a restricting portion for restricting the expansion / contraction amount of the elastic member so as not to exceed a predetermined amount.

  Thereby, for example, when the drive unit reverses the tab, tension is applied even when the tension applied to the band on the side where the tension applying mechanism is provided is excessive when viewed from the drive unit. Since the amount of expansion and contraction of the elastic member can be prevented from exceeding a predetermined amount, the tension applied to the belt on the side opposite to the side on which the tension applying mechanism is provided as viewed from the drive unit becomes smaller than necessary. Can be prevented. As a result, it is possible to extend the life of the band by avoiding the occurrence of problems such as dropping of the band or spinning while the tab is rotating.

  A wood crushing apparatus according to a second invention is the wood crushing apparatus according to the first invention, wherein the tension applying mechanism includes a first support member, a second support member, and a contact portion. Yes. One end of the elastic member is fixed to the first support member. The other end of the elastic member is fixed to the second support member. The contact portion is connected to the first support member, and contacts the part of the second support member when the expansion / contraction amount of the elastic member reaches a predetermined amount.

  Here, the tension applying mechanism has first and second support members that respectively support both ends of the elastic member, and the abutting portion fixed to the first support member side has an amount of expansion and contraction of the elastic member. When the fixed amount is reached, it comes into contact with a part of the second support member.

  Here, one end of the contact portion is fixed to the first support member side, and the other end is not in contact with the second support member at the time of steady operation. When a tension is applied and the expansion / contraction amount of the elastic member reaches a predetermined amount, the elastic member abuts on the second support member, and the elastic member is restricted so that the expansion / contraction of the elastic member is not further.

  As a result, it is possible to prevent the elastic member from expanding and contracting more than necessary, so that when the tab is reversed, the belt member on the side opposite to the side where the tension applying mechanism is provided as viewed from the drive unit. It is possible to prevent the applied tension from becoming smaller than necessary. As a result, it is possible to avoid the occurrence of problems such as the belt dropping off or spinning while the tab is rotating.

  A wood crushing apparatus according to a third invention is the wood crushing apparatus according to the first or second invention, wherein the tension applying mechanism further includes a tension adjusting mechanism for adjusting a tension applied to the belt body. Have.

  Here, in the tension applying mechanism for applying tension to the band, for example, a tension adjusting mechanism is provided for adjusting the tension applied to the band when the rotation of the tab is stopped. Yes.

  Here, the tension adjusting mechanism includes, for example, a mechanism for adjusting the interval between the support ends of the elastic member.

  As a result, even when the belt body such as a chain or a belt has been extended due to a change over time, for example, by adjusting the interval between the support ends of the elastic members, the tension applied to the belt body when the rotation is stopped Can always be kept constant. As a result, it is possible to further effectively reduce the occurrence of slackening of the band when the tab is reversed, and to prevent the occurrence of problems such as dropping of the band from the outer peripheral portion of the tab and idle rotation.

  A wood crushing apparatus according to a fourth invention is the wood crushing apparatus according to any one of the first to third inventions, wherein the tension applying mechanism includes a support frame that supports one end of the elastic member. Further, the support frame has an opening for confirming the relative positional relationship between the elastic member and the restricting portion.

  Here, an opening is provided in the support frame that supports the elastic member as a viewing window for confirming the positional relationship between the elastic member included in the tension applying mechanism and the restricting portion.

  Here, the positional relationship between the elastic member and the restricting portion includes the positional relationship between the support frame that supports one end of the elastic member and the restricting portion.

  Accordingly, it is possible to easily confirm the state of expansion and contraction of the elastic member when the rotation of the tab is stopped and the amount of play in the restricting portion (the amount until the restricting portion functions). As a result, even when the tab is reversed after the start of operation, it is possible to reliably prevent the band from loosening more than necessary, so that the trouble such as dropping of the band from the outer periphery of the tab can be prevented. Generation | occurrence | production can be prevented effectively.

  A wood crushing apparatus according to a fifth aspect of the present invention is the wood crushing apparatus according to the fourth aspect of the present invention, wherein a marking part that can be confirmed from the opening is formed in at least one of the restricting part and the support frame.

  Here, the restriction portion and / or the marking portion formed in the support frame can be confirmed from the opening formed in the support frame that supports one end portion of the elastic member.

  Here, the marking portion includes, for example, a restriction portion that can be seen from the opening, or a mark that colors the end face of the support frame.

  Thereby, in a state where the rotation of the tab is stopped, it is possible to easily confirm the tension applied to the belt body by the elastic member, the expansion / contraction amount of the elastic member until the restricting portion functions, and the like.

  A wood crushing device according to a sixth invention is the wood crushing device according to any one of the first to fifth inventions, wherein the elastic member is a tension spring.

  Here, a tension spring is used as an elastic member included in the tension applying mechanism.

  Thereby, the tension | tensile_strength with respect to a strip | belt body can be generated with a simple mechanism.

  A wood crushing apparatus according to a seventh invention is the wood crushing apparatus according to any one of the first to fifth inventions, wherein the elastic member is a compression spring.

  Here, a compression spring is used as an elastic member included in the tension applying mechanism.

  Thereby, the tension | tensile_strength with respect to a strip | belt body can be generated with a simple mechanism.

The tension applying mechanism according to the eighth aspect of the present invention is attached to a wood crushing device that supplies wood to the crushing part while rotating the strip wound around the tab and rotating the tab in the normal rotation direction or the reverse rotation direction. The tab is arranged close to the downstream side of the driving unit when the tab rotates in the forward rotation direction, and one end of the tab moves along the band according to the magnitude of the tension applied to the band when the tab rotates. This is a tension applying mechanism that applies tension to the body. The tension applying mechanism includes an elastic member for applying tension to the band and the magnitude of the tension applied to the band when the rotation direction of the tab is switched from the normal rotation direction to the reverse rotation direction. And a restricting portion for restricting the amount of expansion / contraction of the elastic member to be a predetermined amount or more when one end of the tension applying mechanism moves along the band .

  Here, a tension (tension) is applied to the tension member provided in the wood crushing apparatus that is driven to rotate by winding the belt around the outer periphery of the tab. A restricting portion is provided for restricting an elastic member such as a spring from being expanded or contracted by a predetermined amount or more.

  Here, the tension applying mechanism is, for example, an elastic spring or the like so that a chain, a belt or the like wound around the tab is gradually stretched by a load applied during use and a part of the belt body is not loosened. This is a mechanism that constantly applies an appropriate tension to the band by pulling a part of the band by the elastic force of the member. The elastic member included in the tension applying mechanism includes, for example, a member such as a spring, and may have a structure that expands or contracts when tension is applied to the belt. It may be.

  Normally, in this tension application mechanism, for example, when the drive unit supplies wood to the crushing unit while repeating forward and reverse rotation of the tab, when the tab is reversed, the tension application mechanism is provided when viewed from the drive unit. Even if the tension applied to the belt on the other side becomes excessive, only the elastic force of an elastic member such as a spring is used. For this reason, as a result of the expansion and contraction of the elastic member, the tension applied to the belt on the side opposite to the side where the tension applying mechanism is provided as viewed from the drive unit becomes smaller than necessary, and from the outer periphery of the tab. There is a risk of troubles such as the belt dropping off or spinning around.

  In the tension applying mechanism of the present invention, for example, there is provided a restricting portion that restricts the amount of expansion / contraction of the elastic member so as not to exceed a predetermined amount even when an excessive tension is applied to the band when the tab is reversed. Yes.

  Thereby, for example, when the drive unit reverses the tab, tension is applied even when the tension applied to the band on the side where the tension applying mechanism is provided is excessive when viewed from the drive unit. Since the amount of expansion and contraction of the elastic member can be prevented from exceeding a predetermined amount, the tension applied to the belt on the side opposite to the side on which the tension applying mechanism is provided as viewed from the drive unit becomes smaller than necessary. Can be prevented. As a result, it is possible to extend the life of the band by avoiding the occurrence of problems such as dropping of the band or spinning while the tab is rotating.

  According to the wood crushing apparatus according to the present invention, it is possible to avoid the occurrence of problems such as dropping or idling of the belt during rotation of the tab.

  A wood crushing apparatus according to an embodiment of the present invention will be described below with reference to FIGS.

  As for “front” and “rear” used in the following description, the direction in which the conveyor 6 protrudes is indicated as “front” and the opposite side is indicated as “rear”.

[Configuration of the whole wood crushing apparatus 10]
The wood crushing apparatus 10 according to this embodiment is a self-propelled wood crushing apparatus as shown in FIGS. 1 to 3, and includes a crusher 1, a substantially cylindrical tab (rotary tab) 2, A machine base (machine body) 3, a traveling body 4, a hopper 5, and a transfer conveyor 6 are provided.

  The crusher 1 is a device that finely crushes a block of wood supplied from a tab 2 and is disposed on a machine base (machine body) 3 to which a traveling body 4 is attached.

  The tab 2 is disposed on the rear side of the machine base 3 and is rotated (forward rotation, reverse rotation) around the axis by a drive unit (see FIG. 4) described later, and is relative to the crusher 1 disposed below. Supply wood. Further, a hopper (fixed hopper) 5 is attached above the tab 2, and wood is supplied into the tab 2 by putting wood into the hopper 5. Various members for rotating the tab 2 will be described in detail later.

  The machine base 3 is attached to the traveling body 4, and the crusher 1 etc. are mounted on the upper surface.

  The traveling body 4 advances and reverses the wood crushing device 10 by rotating the crawler belts wound around the left and right ends of the traveling direction.

  The hopper 5 is provided with an inlet 8 that is inclined with respect to a horizontal plane, and is provided with a scattering prevention cover 9 that covers a part of the inlet 8.

  The conveyor 6 has a substantially horizontal member disposed on the lower side of the crusher 1, receives a crushed material of a predetermined particle size that has passed through a discharge hole of a predetermined size, and discharges it to the outside. In addition, as the conveyor 6, you may comprise by one belt and a single drive motor, and may use the structure which drives a several belt with each drive motor.

  In the wood crushing apparatus 10, the wood is crushed by the crusher 1, the crushed material is supplied to the lower side of the crusher 1, and is discharged to the outside by the transport conveyor 6.

[Configuration around Tab 2]
(Configuration of tab 2)
As shown in FIG. 4, a chain (band body) 11 is wound around the outer peripheral surface of the tab 2 along a substantially horizontal direction, and the rotational driving force from the drive unit 30 is transmitted via the chain 11. It is a cylindrical member that is driven to rotate. The tab 2 supplies wood to the crusher 1 disposed below the tab 2 while repeating forward rotation (see the arrow shown in FIG. 4) and reverse rotation according to the rotation direction of the drive motor M. Further, as shown in FIGS. 4 and 5, the outer peripheral surface of the tab 2 includes a pair of guide outer flange portions 20a and 20b opposed to each other at the lower end portion thereof, and an upper guide outer flange portion 20a. Further, a sprocket 12 around which the chain 11 is wound is disposed. Further, as shown in FIG. 4, a horizontal roller 21 that guides the rotation of the tab 2 and a vertical roller 22 that supports the tab 2 are disposed at a position adjacent to the outer peripheral surface of the tab 2.

  As shown in FIGS. 4 to 7, the guide outer flange portions 20 a and 20 b are each composed of a flat plate-like main body and a support piece that supports the main body, and the vertical roller 22 includes the guide outer flange portion 20 a, It abuts against the body portion of 20b. Four rollers 21 and 22 are arranged along the outer peripheral surface of the tab 2.

  As shown in FIGS. 4 and 6, the horizontal roller 21 is in a state in which a portion of the roller portion 21 a can be rotated via a bearing 24, 24 on a column 23 erected on a frame 35 attached to the machine base 3. It is supported by. And it rolls between the upper and lower guide outer flange portions 20a, 20b provided on the outer peripheral surface of the tab 2.

  As shown in FIGS. 4 and 7, the vertical roller 22 has a roller portion 22 a on a support shaft 25 provided on a support column 27 erected on a frame 35 attached to the machine base 3 via bearings 26 and 26. The roller portion 22a is in contact with the upper guide outer flange portion 20a to support the tab 2 in a rotatable state.

(Configuration of chain 11)
The chain 11 is an endless roller chain configured by alternately combining pin links and roller links and connecting them via pins. As shown in FIGS. 4 and 5, the chain 11 is wound around the sprocket 12 provided on the outer peripheral surface of the tab 2 at a predetermined pitch along the circumferential direction and the sprocket 31 of the drive unit 30. The drive motor M shown in FIG. 5 rotates the sprocket 31 to rotate the tab 2. Further, the chain 11 is tensioned by a tension applying mechanism (tension applying mechanism) 40 in order to always maintain a tension within a predetermined range while being wound around the outer peripheral surface of the tab 2 and the sprocket 31 of the drive unit 30. Is granted. The configuration of the tension applying mechanism 40 will be described in detail later.

  In the wood crushing apparatus 10 of this embodiment, as described above, the tab 11 is rotated while the chain 11 disposed along the outer peripheral surface of the tab 2 is engaged with the sprocket 12 formed on the outer peripheral surface of the tab 2. . For this reason, the rotational force from the drive motor M can be reliably transmitted to the tab 2 via the chain 11.

(Configuration of the drive unit 30)
As shown in FIG. 5, the drive unit 30 that rotationally drives the tab 2 via the chain 11 includes a drive motor (hydraulic motor) M and a sprocket 31 around which the chain 11 is wound. A tension applying mechanism 40 that applies tension to the chain 11 is disposed in the vicinity of the drive unit 30.

  The drive motor M is a rotational drive source for rotating the tab 2 forward or backward, and is disposed at a position other than the position below the wood passage position when the wood is input. Thereby, the fall of the timber etc. to the drive motor M at the time of throwing in the timber can be prevented. As a result, it is possible to prevent the drive of the drive motor M or the like from being dropped due to the fall of wood or the like, the tab 2 can be stably rotated, and the drive motor M can be protected. The service life of the drive unit 30 can be extended.

  The sprocket 31 is fixed to the tip portion of the rotation shaft of the drive motor M, and conveys the wound chain 11 in a predetermined direction when the drive motor M rotates.

(Configuration of tension applying mechanism 40)
The tension applying mechanism 40 is a mechanism that applies a predetermined range of tension to the chain 11 wound around the outer periphery of the tab 2, and is arranged so as to be close to the drive unit 30 that drives the chain 11. ing. More specifically, the tab 2 shown in FIG. 4 is disposed at a position on the downstream side of the drive unit 30 when the tab 2 rotates forward. As shown in FIGS. 8 and 9, the tension applying mechanism 40 includes an elastic member 41, a support frame (first support member) 42, a support member (second support member) 43, and a swing arm 44. , A sprocket 45, a swing shaft 46, a tension adjustment mechanism (tension adjustment mechanism) 47, and a fixed end 48.

  As shown in FIG. 9, the elastic member 41 is configured to include two springs 41a and 41b. And spring 41a, 41b is a tension spring which pulls a part of chain 11 with the reaction force (elastic force) extended rather than the steady state.

  Both ends of the support frame 42 are connected to one end of the elastic member 41 (springs 41a and 41b) and one end of the swing arm 44 to which the sprocket 45 is attached. Further, as shown in FIGS. 9 and 10, the support frame 42 includes a pair of an upper plate 42a and a lower plate 42b arranged in parallel to each other, an observation window 42c, and a contact portion (regulating portion). ) 42d and marking 42e.

  The upper plate 42a and the lower plate 42b are two plate-like members connected by an abutting portion 42d arranged along a substantially vertical direction, and an opening (view window 42c) is formed in the upper plate 42a. ing. A sprocket 45 is rotatably held between the upper plate 42a and the lower plate 42b opposite to the side connected by the contact portion 42d.

  As described above, the observation window 42c is an opening formed in the upper plate 42a (see FIG. 10), and a contact portion (regulation portion) 47d which is a part of the tension adjustment mechanism 47 and the support frame 42 side. The size of the gap between the contact portion 42d can be easily confirmed from the outside.

  The abutting portion 42d is a member bent in a U-shape arranged along a substantially vertical direction connecting the upper plate 42a and the lower plate 42b, and has an opening at the center portion. A part of a tension adjusting mechanism 47, which will be described in detail later, is inserted into this opening. The abutment portion 47d, which is a part of the tension adjustment mechanism 47, abuts against the abutment portion 42d on the support frame 42 side, so that the sprocket 45 moves in the expansion / contraction direction of the springs 41a and 41b, that is, the chain 11 Regulate the movement of In other words, the position where the contact portions 42d and 47d are in contact with each other can be adjusted even when the tension applied to the chain 11 by the elastic member 41 (springs 41a and 41b) becomes excessively large. It can be a limit point. As a result, when the tab 2 is reversely rotated when forward and reverse rotation of the tab 2 is repeated, even when excessive tension is applied to the chain 11 on the side where the tension applying mechanism 40 is provided as viewed from the drive unit 30. Further, the elastic member 41 can be prevented from extending too much. The function of the contact portion 42d and the contact portion 47d as a restricting portion will be described in detail later.

  As shown in FIG. 10, the marking 42 e is a coating portion provided along the edge portion on the elastic member 41 side of the opening (view window 42 c) formed in the upper plate 42 a. And the marking 42e confirms the position of the contact part 47d by the side of the tension adjustment mechanism 47 from the observation window 42c, and the space | interval (refer the distance X in FIG. 10) between contact parts 42d and 47d becomes a moderate magnitude | size. It becomes an index (marker) when making adjustments.

  One end of the support member 43 is coupled to the other end of the elastic member 41 (the side opposite to the side connected to the support frame 42), and the other end is coupled to the tension adjustment mechanism 47. Has been.

  The swing arm 44 has two flat plates 44 a and 44 b arranged vertically in parallel with each other. One end of the swing arm 44 is connected to the support frame 42, and the other end is connected to the swing shaft 46. ing. The swing arm 44 is inserted between the upper plate 42a and the lower plate 42b constituting the support frame 42 at the end connected to the support frame 42, and the upper and lower flat plates 44a, A sprocket 45 is rotatably mounted between 44b. The swing arm 44 swings about the swing shaft 46. Thereby, the tension | tensile_strength provided with respect to the chain 11 can be adjusted because the sprocket 45 around which the chain 11 is wound moves along the circular arc centering on the rocking | swiveling axis | shaft 46. FIG.

  As described above, the sprocket 45 is connected to the support frame 42 and the swing arm 44, that is, above and below the swing arm 44 disposed so as to be sandwiched between the upper plate 42a and the lower plate 42b of the support frame 42. Between the flat plates 44a and 44b. The sprocket 45 has a part of the chain 11 wound around the outer periphery of the tab 2. Here, when the tab 2 starts normal rotation (see the arrow direction in FIG. 4), the tension of the chain 11 on the upstream side of the drive unit 30 temporarily increases, while the downstream side of the drive unit 30 The tension of the chain 11 is temporarily reduced. For this reason, when the tab 2 starts normal rotation, the sprocket 45 arranged on the downstream side of the drive unit 30 moves so as to draw the chain 11 whose tension is lowered to the inside (the elastic member 41 side). On the other hand, when the tab 2 starts reverse rotation (rotation in the direction opposite to the arrow direction in FIG. 4), the tension of the chain 11 on the sprocket 45 side increases as viewed from the drive unit 30, contrary to the above. On the other hand, the tension of the chain 11 on the opposite side as viewed from the drive unit 30 decreases. For this reason, when the tab 2 starts reverse rotation, the sprocket 45 disposed on the upstream side of the drive unit 30 is moved to the outside (the outer peripheral side of the chain 11) by the chain 11 with increased tension.

  The swing shaft 46 is a member that is connected to one end of the above-described swing arm 44 and serves as a swing shaft, and is fixedly disposed in a substantially vertical direction with respect to the same base as the drive unit 30 described above. Yes.

  The tension adjusting mechanism 47 is a mechanism for adjusting the tension applied to the chain 11 by adjusting the pulling degree of the two springs 41a and 41b included in the elastic member 41, and one of the springs 41a and 41b. The hook member formed at the end of the support member 43 supports the position of the elastic member 41 in the expansion / contraction direction of the support member 43 connected thereto. Further, as shown in FIG. 9, the tension adjusting mechanism 47 includes a bolt member 47b supported by the fixed end 48, a nut member 47a screwed to the bolt member 47b, a bolt member 47b, and a contact portion 47d. And a contact portion 47d that contacts the contact portion 42d on the support frame 42 side. And the position of the said supporting member 43 to which one hook part of spring 41a, 41b is latched by this nut member 47a is set. The procedure for adjusting the tension of the chain 11 by the tension adjusting mechanism 47 will be described in detail later.

  The fixed end 48 is a member fixedly arranged with respect to the frame 35, and one end of the tension adjusting mechanism 47 is connected to be a reference position when adjusting the elastic force of the elastic member 41.

  In the wood crusher 10 of this embodiment, as described above, the tension applied from the tension applying mechanism 40 to the chain 11 is adjusted by the tension adjusting mechanism 47 before the rotation of the tab 2 is started. Then, the chain 11 is engaged with each sprocket 12 provided on the outer peripheral surface of the tab 2, and the drive motor M is rotated so that the chain 11 to which an appropriate tension is applied can run endlessly. it can. As a result, the traveling force of the chain 11 is transmitted to the tab 2 via each sprocket 12, and the tab 2 rotates about the axis.

<Adjustment of tension of chain 11 by tension adjusting mechanism 47>
Here, the procedure for adjusting the tension applied from the tension applying mechanism 40 to the chain 11 by the tension adjusting mechanism 47 described above will be described as follows.

  That is, when adjusting the magnitude of the tension from the tension applying mechanism 40 to the chain 11 by the tension adjusting mechanism 47, the nut member 47a is screwed back and forth with respect to the bolt member 47b. Accordingly, the position of the support member 43 where the positions of the springs 41a and 41b in the expansion / contraction direction of the springs 41a and 41b can be moved by the nut member 47a. Therefore, the support frame 42 and the support frame 42 in which both ends of the springs 41a and 41b are connected are supported. The distance from the member 43, that is, the amount of extension of the springs 41a and 41b can be changed. As a result, the tension applied to the chain 11 can be easily adjusted simply by changing the position of the nut member 47a with respect to the bolt member 47b.

  More specifically, in the state shown in FIG. 9, when the nut member 47a is moved to the fixed end 48 side, the elastic force of the springs 41a and 41b increases, so the sprocket 45 with which the chain 11 is engaged. Is pulled toward the fixed end 48, and the tension of the chain 11 (the tightening force of the chain 11 on the tab 2) increases. On the other hand, when the nut member 47a is moved to the side opposite to the fixed frame side, the elastic force of the springs 41a and 41b is reduced, so that the pulling force toward the fixed end 48 side of the sprocket 45 is reduced. The tension of the chain 11 (the tightening force of the chain 11 on the tab 2) is reduced.

  In the wood crushing device 10 of the present embodiment, as described above, it is possible to easily adjust the magnitude of the tension applied to the chain 11 by adjusting the position of the nut member 47a with respect to the bolt member 47b. .

<Adjustment of the distance between the contact portions (regulators) 42d and 47d by the tension applying mechanism 40>
Further, in the wood crushing apparatus 10 of the present embodiment, the elastic member 41 is used for adjusting the limit position of the extension amount of the springs 41a and 41b and adjusting the tension of the chain 11 before the rotation of the tab 2 is started. It can be performed using a viewing window 42c and a marking 42e formed on the upper plate 42a of the support frame 42 to which one end of the support frame 42 is connected.

  Specifically, as shown in FIG. 10, the position of the end surface of the colored contact portion 47d that is a part of the tension adjustment mechanism 47 can be confirmed from the observation window 42c. That is, the distance (distance X in FIG. 10) between the abutting portion 42d that is a part of the support frame 42 and the abutting portion 47d that functions as a regulating portion by abutting against the abutting portion 42d can be confirmed. .

  Here, the contact part 47d can move between the contact part 47d shown by a solid line in FIG. 9 and the contact part 47d shown by a two-dot chain line. For this reason, when the distance between the contact portions 42d and 47d is extremely large (for example, the state of the two-dot chain line shown in FIG. 9), when the tab 2 is reversed, the tension applying mechanism is viewed from the drive unit 30. When an excessive tension is applied to the chain 11 on the side where the chain 40 is provided, the elastic member 41 is excessively stretched due to an increase in the tension of the chain 11. In this case, the chain 11 on the side opposite to the side on which the tension applying mechanism 40 is provided when viewed from the drive unit 30, as in the conventional wood crushing device that does not have the contact portions 42 d and 47 d that function as the regulating portions. The tension of the belt 11 drops more than necessary, and the chain 11 falls off the sprocket 12 formed on the outer peripheral surface of the tab 2, or the tab 2 and the chain 11 are disengaged and the tab 2 is idle. May occur.

  On the other hand, when the distance between the abutting portions 42d and 47d is too small (for example, the solid line state shown in FIG. 9), the abutting portions 42d and 47d immediately come into contact with each other even if the tension of the chain 11 is slightly changed. As a result, the tension of the chain 11 may not be adjusted properly.

  Therefore, in the wood crushing apparatus 10 of the present embodiment, the position of the contact portion 47d on the tension adjustment mechanism 47 side, that is, on the support frame 42 side, from the opening (view window 42c) formed in the upper plate 42a of the support frame 42. The distance X between the abutting portion 42d and the abutting portion 47d on the tension adjusting mechanism 47 side is confirmed, and the tension adjusting mechanism 47 adjusts the distance X to an appropriate distance.

  Specifically, the nut member 47a is moved relative to the bolt member 47b in the same manner as the tension adjustment by the tension adjustment mechanism 47 described above. For example, when it is desired to reduce the distance X between the contact portions 42d and 47d, the nut member 47a is moved to the fixed end 48 side. On the other hand, when it is desired to increase the distance X between the contact portions 42 d and 47 d, the nut member 47 a is moved to the side opposite to the fixed end 48. Accordingly, the position of the support member 43 in which the bolt member 47b is positioned in the longitudinal direction can be moved by the nut member 47a, so that the distance between the contact portions 42d and 47d is also adjusted via the elastic member 41. be able to.

  At this time, it is preferable to adjust the distance between the contact portions 42d and 47d using the marking 42e formed on the support frame 42 as a mark. That is, when viewed from the observation window 42c, the marking 42e formed along the edge of the observation window 42c on the upper plate 42a of the support frame 42 can be confirmed from the observation window 42c of the contact portion 47d on the tension adjustment mechanism 47 side. By adjusting the position of the nut member 47a of the tension adjusting mechanism 47 so as to be side by side with the colored end face with almost no gap, the distance between the contact portions 42d and 47d can be adjusted more easily.

[Features of the present wood crushing apparatus 10]
(1)
As shown in FIG. 4, the wood crushing apparatus 10 of the present embodiment rotates the tab 2 by winding the chain 11 around the outer periphery of the tab 2 and rotating the sprocket 31 engaged with the chain 11 by the drive motor M. A device for driving, which includes a tension applying mechanism 40 that applies tension to the chain 11 wound around the outer periphery of the tab 2. Then, as shown in FIG. 9, the tension applying mechanism 40 regulates the elastic member 41 that generates an elastic force for pulling a part of the chain 11 and the elastic member 41 so that the elongation of the elastic member 41 does not exceed a predetermined amount. It has contact parts 42d and 47d.

  Thus, in the wood crushing apparatus 10 that is operated while the rotation direction of the tab 2 is repeatedly switched between forward and reverse rotation, the side on which the sprocket 45 included in the tension applying mechanism 40 is engaged when the tab 2 is reversely rotated. Even when a large tension is applied to the chain 11, it is possible to prevent the sprocket 45 from moving excessively in the direction in which the elastic member 41 is extended. Therefore, even when an excessive tension is applied to the chain 11 when the tab 2 is reversed, the elastic member 41 included in the tension applying mechanism 40 is excessively extended, and the upstream side chain 11 is viewed from the drive unit 30. It can prevent that tension falls. As a result, it is possible to prevent the occurrence of problems such as the chain 11 dropping off from the sprocket 12 formed on the outer periphery of the tab 2 or rotating the chain 11 during the rotation of the tab 2, and extending the life of the chain 11. be able to.

(2)
In the wood crushing apparatus 10 of the present embodiment, as shown in FIG. 9, the tension applying mechanism 40 includes a support frame 42 to which one end of the elastic member 41 is connected, and the other end of the elastic member 41 is connected. The support member 43 to be applied, and a contact portion 47d for contacting the contact portion 42d on the support frame 42 side and restricting the elastic member 41 from extending further when the extension amount of the elastic member 41 reaches a predetermined amount; , Is configured to include.

  As a result, even when a large tension is applied to the chain 11 on the tension applying mechanism 40 side when the tab 2 is reversed, the contact portion 42d on the support frame 42 side and the contact portion 47d on the tension adjustment mechanism 47 side contact each other. By contacting, it is possible to prevent the elastic member 41 from extending a predetermined amount or more. As a result, the combination of the abutting portion 42d and the abutting portion 47d can function as a restricting portion that restricts the extension of the elastic member 41, so that it is possible to prevent the occurrence of problems such as dropping of the chain 11 and idling. it can.

(3)
In the wood crushing apparatus 10 of this embodiment, as shown in FIG. 9, the tension applying mechanism 40 is a distance between members (support frame 42, support member 43) to which both ends of the elastic member 41 are connected, that is, the elastic member 41. A tension adjusting mechanism 47 that adjusts the amount of elongation (elastic force).

  Thus, the tension adjustment mechanism 47 can adjust the tension so that an appropriate tension is applied from the tension applying mechanism 40 to the chain 11 before the rotation of the tab 2 is started. As a result, the tension of the chain 11 can be set to an appropriate state before the tab 2 is rotated. Therefore, when the tab 2 is reversed, problems such as dropping of the chain 11 and idling due to the loosening of the chain 11 occur. It can be avoided.

(4)
In the wood crushing apparatus 10 of this embodiment, as shown in FIG. 10, the elastic member 41 and the upper plate 42 a to which one end of the elastic member 41 included in the tension applying mechanism 40 is connected are contacted with the elastic member 41. A viewing window 42c is formed to confirm the relative positional relationship with the contact portion 47d, that is, the interval between the members connected at both ends of the elastic member 41, or the interval between the contact portions 42d and 47d. Yes.

  Thus, the tension applied to the chain 11 from the tension applying mechanism 40 in the previous stage of rotating the tab 2 by the tension adjusting mechanism 47 or the contact portion 42d on the support frame 42 side and the contact on the tension adjusting mechanism 47 side. The distance from the contact portion 47d can be adjusted to an appropriate state.

(5)
In the wood crushing apparatus 10 of the present embodiment, as shown in FIG. 10, in order to easily confirm the position of the end surface of the contact portion 47d from the observation window 42c formed on the support frame 42, the edge of the observation window 42c. A marking 42e is provided along the line.

  As a result, the tension can be adjusted by the tension adjusting mechanism 47 while the position of the contact portion 47d on the side of the tension adjusting mechanism 47 functioning as the restricting portion is easily confirmed.

(6)
As shown in FIG. 9, the wood crushing apparatus 10 of the present embodiment includes two tension springs 41 a and 41 b as the elastic member 41 included in the tension applying mechanism 40.

  Thereby, tension can be applied to the chain 11 by pulling the sprocket 45 wound around the chain 11 by the pulling force of the tension springs 41a and 41b. As a result, the chain 11 can be brought into contact with the outer peripheral surface of the tab 2 with an appropriate pressure.

[Other Embodiments]
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of invention.

(A)
In the above embodiment, an example in which the tension springs 41 a and 41 b are employed as the elastic member 41 included in the tension applying mechanism 40 has been described. However, the present invention is not limited to this.

  For example, as illustrated in FIGS. 11A and 11B, a tension applying mechanism 140 including an elastic member 141 that employs a compression spring 141a instead of the tension spring may be used.

  In this tension applying mechanism 140, as shown in FIGS. 11 (a) and 11 (b), the compression spring 141a has a fixed wall 149a and a movable wall 149b that moves between the solid line and the two-dot chain line in the figure. It is arrange | positioned so that it may be pinched | interposed between. For this reason, when the tension of the chain 11 wound around the sprocket 45 increases and the sprocket 45 moves away from the fixed end 48, the movable wall 149b also moves away from the fixed end. As a result, the compression spring 141a is deformed in the contracting direction, and a tension to the chain 11 can be applied by a reaction force to be extended.

  11A and 11B, the support frame 142 (the upper plate 142a, the lower plate 142b, and the observation window 142c) corresponds to the support frame 42 of the above embodiment, and includes a tension adjustment mechanism. 147 (nut member 147a, bolt member 147b, connecting portion 147c, contact portion 147d) corresponds to the tension adjusting mechanism 47 of the above-described embodiment, and the same effects as described above can be obtained by each configuration.

(B)
In the said embodiment, the chain 11 was meshed | engaged with the sprocket 12 formed in the outer periphery of the tab 2, and the example which rotates the tab 2 was demonstrated. However, the present invention is not limited to this.

  For example, a rubber-based material may be affixed to the outer periphery of a tab around which a belt body such as a chain or a belt is wound, and the tab may be rotated by frictional force while the belt body is in contact therewith.

  Even with such a configuration, it is possible to prevent the occurrence of problems such as the belt body loosening and dropping off from the side surface of the tab or the tab spinning idle when the tab is reversed, etc. Can be obtained. Furthermore, by preventing the strip from falling off or idling, it is possible to reduce the amount of wear of the rubber-based material attached to the side surface of the tab and extend the useful life of the tab.

(C)
In the said embodiment, the example which used the chain as a strip | belt body wound around the outer periphery of the tab 2 was given and demonstrated. However, the present invention is not limited to this.

  For example, a belt such as a belt can be used in addition to the chain.

(D)
In the above-described embodiment, the tension applying mechanism 40 in which the two springs 41a and 41b are mounted as elastic members has been described as an example of the tension applying mechanism. However, the present invention is not limited to this.

  For example, the number of attached springs may be one, or three or more.

(E)
In the above embodiment, as illustrated in FIG. 8, the example in which the tension applying mechanism 40 is disposed on the left side of the driving unit 30 in the plan view has been described. However, the present invention is not limited to this.

  For example, the tension applying mechanism 40 may be disposed on the right side (lower side) of the drive unit 30 in plan view. In this case, the tension of the chain 11 increases when the tab 2 shown in FIG. 4 is rotated forward, and the tension of the chain 11 decreases when the tab 2 is reversed. Therefore, the same effect as described above can be obtained by restricting the excessive elongation of the elastic member 41 during the forward rotation of the tab 2.

(F)
In the above-described embodiment, the observation frame 42c is provided in the support frame 42 included in the tension applying mechanism 40, and the tension adjustment and the contact portion 42d on the support frame 42 side and the tension adjustment mechanism 47 are referred to from the marking 42e. An example of adjusting the distance from the contact portion 47d on the side has been described. However, the present invention is not limited to this.

  For example, the observation window for adjustment is not limited to the support frame, and may be formed on another member.

  In addition, the marking may be formed not only on the surface of the support frame but also on other members such as the end face of the contact portion.

(G)
In the said embodiment, in this timber crushing apparatus, the example which mounted | wore with the crawler type traveling body 4 was given and demonstrated. However, the present invention is not limited to this.

  For example, as a traveling body, a tire-type thing may be mounted | worn, it may be set as a stationary type without providing a traveling body, or it may be set as a portable wood crushing apparatus.

(H)
In the above embodiment, an example in which one tension applying mechanism 40 is provided in the vicinity of the driving unit 30 has been described. However, the present invention is not limited to this.

  For example, tension applying mechanisms may be provided on both sides of the drive unit, or a plurality of tension applying mechanisms may be arranged at the four corners of the frame.

(I)
In the said embodiment, the example which applied this invention with respect to the wood crushing apparatus 10 was given and demonstrated. However, the present invention is not limited to this.

  For example, even when the present invention is applied to a tension applying mechanism (tension applying mechanism), a wood crushing apparatus equipped with the same can naturally obtain the same effects as described above.

  The wood crushing apparatus of the present invention has an effect of preventing the strip body (chain, belt, etc.) from dropping off and the tab from rotating freely even when the forward and reverse rotation of the tab is repeated. The present invention can be widely applied to various apparatuses having a mechanism for driving a belt around the outer periphery of the belt.

The front view which shows the external appearance of the wood crushing apparatus which concerns on one Embodiment of this invention. The side view of the wood crushing apparatus of FIG. The top view of the wood crushing apparatus of FIG. The top view which shows the structure of the tab periphery contained in the wood crushing apparatus of FIG. The side view which shows the structure of the tab periphery of FIG. Sectional drawing which shows the horizontal roller arrange | positioned along the outer peripheral part of the tab shown in FIG.4 and FIG.5. Sectional drawing which shows the vertical roller arrange | positioned along the outer peripheral part of the tab shown in FIG.4 and FIG.5. The top view which shows the structure of the tension | tensile_strength provision mechanism arrange | positioned in the vicinity of the tab shown in FIG. 4 and FIG. The side view which shows the structure of the tension | tensile_strength provision mechanism of FIG. The top view which shows the observation window formed in the support frame contained in the tension | tensile_strength provision mechanism of FIG. 8 and FIG. 9, and the marking confirmed from there. (A) And (b) is the top view and side view which show the structure of the tension | tensile_strength provision mechanism mounted in the wood crushing apparatus which concerns on other embodiment of this invention.

Explanation of symbols

1 Crusher (crushing part)
2 Tab 5 Popper 8 Slot 10 Wood crusher 11 Chain (band)
12 sprocket 20a guide outer flange portion 20b guide outer flange portion 21 horizontal roller 22 vertical roller 23 column 24 bearing 25 support shaft 26 bearing 27 column 30 drive unit 31 sprocket 35 frame 40 tension applying mechanism (tension applying mechanism)
41 Elastic member 41a Spring (Tension spring)
41b Spring (Tension spring)
42 Support frame (first support member)
42a Upper plate 42b Lower plate 42c Peep window (opening)
42d Contact part (regulation part)
42e Marking (marking part)
43 Support member (second support member)
44 Oscillating arm 45 Sprocket 46 Oscillating shaft 47 Tension adjusting mechanism (tension adjusting mechanism)
47a Nut member 47b Bolt member 47c Connection part 47d Contact part (regulation part)
140 Tensioning mechanism (tensioning mechanism)
141 Elastic member 141a Compression spring 142 Support frame 142a Upper plate 142b Lower plate 142c Peep window (opening)
147 Tension adjustment mechanism (Tension adjustment mechanism)
147a Nut member 147b Bolt member 147c Connection portion 147d Contact portion (regulation portion)
149a Fixed wall 149b Movable wall M Drive motor X Distance

Claims (8)

A crushing section for crushing wood;
A tab for supplying the wood to the crushing part while rotating around a rotation axis above the crushing part;
A belt body that is wound so as to contact the outer periphery of the tab;
A drive unit for rotating the tab in the normal rotation direction or the reverse rotation direction by rotating the belt;
The tab is disposed close to the downstream side of the drive unit when the tab rotates in the forward rotation direction, and one end of the tab moves along the band according to the amount of tension applied to the band when the tab rotates. A tension applying mechanism that applies tension to the belt body,
With
The tension applying mechanism includes: an elastic member for applying tension to the band; and a magnitude of tension applied to the band when the rotation direction of the tab is switched from the normal rotation direction to the reverse rotation direction. And a restricting portion for restricting the amount of expansion and contraction of the elastic member to be a predetermined amount or more when one end of the tension applying mechanism is moved along the belt body .
Wood crusher. The tension applying mechanism is connected to the first support member to which one end of the elastic member is fixed, the second support member to which the other end of the elastic member is fixed, and the first support member. And an abutting portion that abuts a part of the second support member when the amount of expansion and contraction of the elastic member reaches the predetermined amount.
The wood crushing apparatus according to claim 1. The tension applying mechanism further includes a tension adjusting mechanism that adjusts a tension applied to the belt.
The wood crushing apparatus according to claim 1 or 2. The tension applying mechanism further includes a support frame that supports one end of the elastic member,
The support frame is formed with an opening for confirming a relative positional relationship between the elastic member and the restricting portion.
The wood crushing apparatus of any one of Claim 1 to 3. At least one of the restricting portion and the support frame is formed with a marking portion that can be confirmed from the opening,
The wood crushing apparatus according to claim 4. The elastic member is a tension spring;
The wood crushing apparatus according to any one of claims 1 to 5. The elastic member is a compression spring;
The wood crushing apparatus according to any one of claims 1 to 5. The wound around the strip to the tab attached to the timber crushing apparatus for supplying a timber against crushing part while rotating the tub in the forward direction or reverse direction by rotating the driving unit, the tub is positive The belt body is arranged close to the downstream side of the drive unit when rotating in the rolling direction, and one end thereof moves along the belt body according to the magnitude of the tension applied to the belt body when the tab rotates. A tension applying mechanism that applies tension to the
An elastic member for applying tension to the band, and the tension applied when the rotation direction of the tab changes from the normal rotation direction to the reverse rotation direction, and the tension applied to the band changes. A restriction portion for restricting the amount of expansion and contraction of the elastic member to be a predetermined amount or more when one end of the mechanism moves along the belt body ,
Tensioning mechanism.

Images