Timber crusher

Details Timber crusher Timber crusher

2001-12-19

2004-06-08

Rosenbaum, Mark (Department: 3725)

Solid material comminution or disintegration

Apparatus

Combined or convertible

C241S186400, C241S285300

Reexamination Certificate

active

06745965

ABSTRACT:

TECHNICAL FIELD
The present invention relates to a timber crusher including a crusher and a rotary tub.
BACKGROUND ART
As a scattering prevention cover for preventing timber pieces crushed by a timber crusher from scattering to an outside, for example, there is conventionally an art as shown in FIG.
10
through FIG.
12
. The constitution thereof will be explained based on the drawings.
A timber crusher
50
has an engine
52
, and a crusher
54
rotationally driven by the engine
52
via a propeller shaft
53
, on a base
51
. The rotary tub
55
in a funnel form for guiding the timber charged from an outside is placed above the crusher
54
, and part of an outer periphery surface of the crusher
54
is exposed to an inside of the rotary tub
55
. A scattering prevention cover
56
in a shell form having a lower end edge in close vicinity of an upper end portion of the rotary tub
55
is placed at the upper edge of the rotary tub
55
to face a scattering direction Q of the timber pieces crushed by rotation of the crusher
54
as shown in
FIGS. 11 and 12
. As shown in
FIG. 10
, a conveyor
58
for discharging the crushed timber pieces to the outside is placed under the crusher
54
.
According to the above-described constitution, the timber charged from an upper opening (charging port) of the rotary tub
55
is guided into the crusher
54
by the rotation of the rotary tub
55
and crushed by the crusher
54
. The crushed timber pieces are discharged to the outside by the conveyor
58
. The timber pieces scattering in the direction Q shown in
FIG. 11
following the rotation direction of the crusher
54
when they are crushed by the crusher
54
are prevented from scattering to the outside by the scattering prevention cover
56
.
However, the above-described prior art has the following disadvantages.
(1) In order to make it easy to charge timber into the rotary tub
55
, the scattering prevention cover
56
cannot sufficiently cover the charging port of the rotary tub
55
. Thus, crushed timber pieces easily scatter to the outside from the charging port of the rotary tub
55
. Further, as shown in
FIG. 12
, the timber pieces forcibly collided against the scattering prevention cover
56
in a shell form disposed opposite the scattering direction Q of the timber pieces sometimes spring back in a direction
5
shown in FIG.
12
and scatter outside the rotary tub
55
, whereby scattering prevention effect cannot be sufficiently obtained.
(2) The timber charged from the upper opening of the rotary tub
55
located above the crusher
54
sometimes collides directly against the crusher
54
, and therefore the crusher
54
is easily damaged.
DISCLOSURE OF THE INVENTION
The present invention is made in view of the above-described disadvantages, and its object is to provide a timber crusher that can exhibit an effect of preventing timber pieces from scattering to an outside and can prevent damage to the crusher.
In order to attain the above-described object, a first aspect of a timber crusher according to the present invention is a timber crusher comprising, on a base, a crusher for crushing timber into pieces and a rotary tub for guiding the timber to the crusher, and has the constitution in which a hopper having an upwardly open shell part and guiding the charged timber to the rotary tub is provided at an opening of the rotary tub.
According to the above constitution, as a result that the hopper is provided at an opening of the rotary tub, the opening of the rotary tub is covered with the hopper. Consequently, even if the timber pieces crushed by the crusher scatter, they collide against an inner wall of the hopper and are thrown back to return into the rotary tub. Further, the timber pieces forcibly colliding and thrown back are thrown back by the inner wall of the hopper on the opposite side. Accordingly, the timber pieces scattering outside the rotary tub are reduced, thus making it possible to improve the scattering prevention effect.
Further, in the timber crusher, the hopper may be inclined with respect to the horizontal.
According to the above constitution, since the hopper is inclined with respect to the horizontal, the area of the charging port of the hopper seen from the timber charging direction is substantially larger than the area in the plan view. Specifically, the substantial area of the charging port becomes larger when the hopper is inclined than when the hopper is horizontally placed. Further, since the hopper is inclined, an operator of a charging machine (for example, a wheel loader and the like) for charging timber to the timber crusher can easily confirm the position of the charging port. For these reasons, charging of timber into the hopper is facilitated and efficiency of the timber crushing operation is improved.
Further, in the timber crusher, the hopper may be tiltable with respect to the horizontal.
According to the above constitution, the hopper is selectively tilted according to the use conditions.
Specifically, during the timber crushing operation, the hopper is tilted to facilitate the crushing operation such as charging of timber. On the other hand, at the time of transportation of the timber crusher, the hopper is made horizontal, whereby the height of the hopper, and the vehicle height of the timber crusher in its turn, are reduced and can be kept within the transportation limit value. As a result, both the crushing operation efficiency and transportability of the timber crusher can be improved.
Furthermore, in the timber crusher, the hopper may be provided with a scattering prevention cover for preventing the timber from scattering to an outside from an inside of the rotary tub.
According to the above constitution, since the hopper is provided with the scattering prevention cover, the timber pieces scattering from the crusher is thrown back at the hopper inner wall and/or the scattering prevention cover, and most of them are returned into the rotary tub. Accordingly, since the timber pieces scattering to the outside of the rotary tub are sharply reduced, the scattering prevention effect can be surely obtained.
Further, in the timber crusher, the scattering prevention cover may be inclined downward to a timber charging port of the rotary tub.
According to the above constitution, even if the timber pieces forcibly collide against the scattering prevention cover, the scattering prevention cover is inclined downward to the timber charging port, and therefore the timber pieces are thrown back into the rotary tub. Accordingly, the probability of the timber pieces scattering toward the timber charging port is extremely low, and therefore the scattering prevention effect can be surely exhibited. In addition, since the scattering prevention cover also has the function of a chute for transferring the timber charged into the hopper to the charging port, timber is easily charged into the rotary tub, and the efficiency of the timber crushing operation is improved. Further, since the timber can be dropped onto the scattering prevention cover (specifically, the chute), the dropped timber does not directly collide against the crusher, and thus damage to the crusher can be prevented.
A second aspect of a timber crusher according to the present invention is a timber crusher comprising, on a base, a crusher rotating around a substantially horizontal rotation axis and crushing timber into pieces, a rotary tub for guiding the charged timber to the crusher, and a scattering prevention cover for preventing the timber from scattering to an outside from an inside of the rotary tub, and has the constitution in which a timber charging port is formed at an opening of the rotary tub by an edge portion of the scattering prevention cover, and a direction of the edge portion is a direction rotated a predetermined angle in a rotational direction of the rotary tub with respect to a rotation axis direction of the crusher, in a plan view.
According to the above constitution, the direction of the edge portion of the scattering prevention cover forming the timber charging port of

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