JPH0335526Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a mobile cutting device that attaches a chainsaw to a hanging hook supported by a working vehicle and cuts multiple pieces of wood gripped by the hanging hook. This is designed to prevent the blade from flying off if it breaks while the blade is being driven.

Conventionally, this type of mobile sawing device has been equipped with a cover to store the chainsaw in order to protect it when loading wood with a hanging hook, but this cover has become an obstacle when cutting wood. Since the chain saw is configured to be separated from the chainsaw to prevent it from breaking, the chain saw is completely unprotected during cutting work, including the chain wheel around which the saw chain of the driving part is wound, and the chain is cut during operation. If this occurs, the inertia of the drive may cause it to jump and pose a danger to the driver and surrounding workers.
In order to prevent this danger, if a protective cover is attached to the drive part of the chainsaw, saw chips from cutting wood can get in and clog the drive part, causing a problem that will interfere with the drive.

In view of these points, the present invention is a movable ball cutting device equipped with a chain stopper installed at the lower part of the drive part of the chainsaw so as to be substantially orthogonal to the saw chain so that wood sawdust does not accumulate and does not become an obstacle during cutting work. It provides:

An embodiment of the present invention will be described below with reference to the drawings.

Reference numeral 1 shows the entire hanging hook, in which a pair of hook bodies 2 and 2' are rotatably opposed to a support 3 in the vertical direction and are pivoted by shaft pins 4 and 4', and the support 3 is attached to a rotating rotary It is pivotally attached to a clevis 6 via an actuator 5 with a shaft pin 7 so as to be swingable. Further, brackets 8, 8' are integrally extended and connected to the shaft attachment portions of the hook bodies 2, 2'.
Axial pins 9, 9' are pivotally connected to the tip of 8' in parallel with the axle pins 4, 4' that pivot the hook bodies 2, 2' to the support 3. The shaft pin 4' is connected to the other shaft pin 9' by the connecting arm 9a.
and one shaft pin 4 are rotatably connected by a connecting arm 9a', and a hydraulic cylinder 10 is horizontally connected between shaft pins 9 and 9' at the tips of brackets 8 and 8', respectively. It is composed of

The hanging hook 1 configured as described above is a hydraulic cylinder 1
0 is actuated, for example, when it is contracted, the hook body 2,
Brackets 8, 8', which are integrally connected to 2', are pulled together via axle pins 9, 9', thereby causing the hook bodies 2, 2' to pivot outward about the axle pins 4, 4'. and opened against the support 3.

In this state, the hook body 2 lowers and grips the wood.
Set it so that 2' straddles it. Therefore, when the hydraulic cylinder 10 is extended, the brackets 8, 8'
is pushed outward via the shaft pins 9, 9', whereby the hook bodies 2, 2' are rotated inwardly around the shaft pins 4, 4' and are in the closed state, i.e., the wood is not hooked. Grip with bodies 2 and 2'.

In addition, in the above configuration, the pin 9 and the shaft pin 4'
is connected by the connecting arm 9a, and since the shaft pin 9' and the shaft pin 4 are connected by the connecting arm 9a', a pressing force is applied between the shaft pins 9 and 9' by the expansion and contraction movement of one hydraulic cylinder 10. Even if the grip is only rotated, an equal rotational force will be applied to both hook bodies 2 and 2', so that they will be rotated symmetrically with respect to the support 3, thereby ensuring reliable opening/closing operation for the object to be grasped. will be done.

A chainsaw 11 is attached to the outer side of the hanging hook 1 configured in this manner. That is, a bracket 13 is attached to the outer side of one of the hook bodies 2 via a base plate 12, and a cover 14 for housing the chainsaw 11 and a support member 15 of the chainsaw 11 are attached to this bracket 13 when not cutting wood. A link mechanism 16 that moves parallel to the ground, a hydraulic cylinder 17 that operates the link mechanism 16, and a return spring mechanism 18 that returns the link mechanism 16 are provided.A hydraulic cylinder 19 is attached to the base plate 12, and this piston rod is connected to one hook. The chainsaw 11 is connected to the outer surface of the body 2 and adjusted to move relative to the hanging hook 1 in accordance with the length of the wood to be cut.

That is, the link mechanism 16 that constitutes the movement adjustment mechanism of the chainsaw 11 is as shown in FIG.
It is pivotally connected to the bracket 13 and the support member 15 at both ends, and the support member 15 is connected to the bracket 13.
An arm link 16a rotatably connects the arm link 16a, a rotary link 16b pivoted approximately at the center of the arm link 16a, and a rotating link 16b having one end attached to the bracket 13 at a portion remote from the pivot point of the arm link 16a. Pivotally connected, the other end is a rotating link 16
a first support link 16 pivotally connected to one end of b
c, and the arm link 16a has one end attached to the support member 15.
It is composed of a second support link 16d which is pivotally connected at a part remote from the pivot part of the bracket 13, the arm link 16a, and one half of the rotary link 16b. and the first support link 16c form a first parallel link mechanism ₁₆₁ , and
The support member 15, the other half of the arm link 16a, the rotation link 16b, and the second support link 16d
A second parallel link mechanism 16 ₂ is formed.

Then, the bracket 13 and arm link 16a
Hydraulic cylinder 1 is connected between the support member 15 side part of
7 and a return spring mechanism 18 are installed. The return spring mechanism 18 is formed in the shape of an endless belt from an elastic member such as rubber, and is suspended between the above-mentioned parts. The movement adjustment mechanism of the chainsaw 11 configured as described above moves the arm link 1 by extending the hydraulic cylinder 17.
6a is rotated downward (clockwise in FIG. 3) against the biasing elasticity of the return spring mechanism 18, and with this rotation, the rotating link 16b is connected to the bracket 13 at one end thereof. The support member 15 is rotated counterclockwise while being pulled by the support link 16c, and this other end side pushes the second support link 16d, so that the support member 15 is rotated counterclockwise with respect to the arm link 16a. Therefore, the support member 15 is moved downward substantially in parallel.

When the pressure on the hydraulic cylinder 17 is released while the support member 15 is being moved downward in this manner, the biasing force of the return spring mechanism 18 causes the arm link 16a to return upward (counterclockwise) and rotate. Accompanying links 16b, 16c, 16d
The support member 15 is also operated in the opposite manner to the above, and the support member 15 is moved upward in a substantially parallel manner.

In this way, the support member 15 is moved up and down substantially in parallel by the so-called double parallel link mechanism of the link mechanism 16, and the chainsaw 11 is moved substantially parallel to the ground when cutting wood, thereby cutting the wood.

The base of the chainsaw bar 21 is sandwiched between bar supports 22 and 23, tightened with bolts 24, and attached to the support member 15 via the bar supports. This support member 15 is formed in an L-shape, and a link mechanism 16 is connected to a vertical portion 15a.
One bar support 22 is installed on one side of the horizontal portion 15b.
However, a sliding rail 25 is slidably connected to the other surface, and the bar support 22 and the sliding rail 25 are connected to the horizontal portion 15 by bolts 26.
b through a guide hole 15c formed in the longitudinal direction, and the sliding rail 25 is slidably adjusted by a bolt 27 pivotally supported by a protrusion 15d protruding from the horizontal portion 15b.
The chainsaw bar 21 is moved and adjusted relative to the support member 15 in accordance with the elongation of the chainsaw bar 1'. This saw chain 21' is a chain wheel 2 of a hydraulic motor 28 for driving a chainsaw attached to the central bending part of the support member 15.
It is wound around 9.

The outer bar support 2 of the chainsaw 11 is thus attached to the hanging hook 1 via the support member 15.
3, a chain stopper 31 is attached to the lower side of the chain saw 11 by bolts 30 so as to extend in a direction substantially perpendicular to the saw chain 21' in order to prevent the saw chain 21' from jumping due to cutting. Although the chain stopper 31 is formed of a round bar, it may have any other shape as long as it has the required strength, that is, it is narrow in the longitudinal direction of the saw chain 21' and long in the orthogonal direction.

Note that 32 in the figure indicates an oil supply pipe connected to each cylinder. Further, the hanging hook 1 is attached to a boom provided on a working vehicle such as a hydraulic backhoe via a clevis 6, but since this is a common practice, explanations and illustrations of the working vehicle, boom, etc. will be omitted.

Next, the operation of the apparatus of this example configured as described above will be explained.

First, by operating the hydraulic cylinder 10 of the hanging hook 1, the hook bodies 2, 2' are rotated inwardly (in the direction of the arrow) from the open state shown by the two-dot chain line to the closed state as shown in FIG. The worker grasps the wood A, and in this state moves it to a predetermined position by driving the work vehicle or turning the boom. At this time, the gripping direction of the hook bodies 2, 2' relative to the wood A is adjusted by operating the rotary actuator 5 and rotating the support body 3.

Next, the movement adjustment hydraulic cylinder 19 is operated to adjust the movement of the chainsaw 11 relative to the hanging hook 1 according to the length of the wood A to be cut, and then the drive hydraulic motor 28 is activated to drive the chainsaw 11. 11 is a piece of wood A that is exposed from the cover 14 and is gripped by the hooks 2 and 2'.
cut. At the same time as the chainsaw 11 is driven to cut, the hydraulic cylinder 17 is also operated to swing the link mechanism 16 connected to the support 15, and the wood A is cut while the chainsaw 11 is moved approximately parallel to the ground. .

When cutting this wood A, the lower side of the chainsaw 11 is the cutting drive side, so no matter where the saw chain 21' cuts during cutting, the cut end will jump to the lower drive side of the chainsaw 11. However, in this example, since a chain stopper 31 is installed horizontally below the drive of the chainsaw 11 in a direction substantially perpendicular to the saw chain 21', the cut end of the saw chain 21' is caught on this and the jump is prevented. be done.

Further, since the chain stopper 31 is formed of a narrow material such as a rod, saw dust and the like do not accumulate during normal wood cutting and do not impede the rotation of the saw chain 21'.

As described above, according to the present invention, in a movable ball cutting device in which a chainsaw is attached to a gripping hook so that the chainsaw can be moved and adjusted in the horizontal direction, the lower part of the drive side of the chainsaw is provided with a chain saw substantially perpendicular to the chainsaw teeth. ,
Equipped with a chain stopper that is narrow in the longitudinal direction of the chainsaw teeth and long in the orthogonal direction, so that sawdust does not accumulate on the chain stopper during wood cutting work, and the rotational drive of the chainsaw is controlled. It can be carried out smoothly without any problems, and if the chainsaw tooth, that is, the saw chain breaks for some reason, the cut end, which would jump toward the drive side, is caught around the chain stopper, and the jump is almost completely prevented. There is no risk of being blocked and causing harm to the driver or surrounding workers, ensuring work safety and improving work efficiency, and the configuration is simple and can be easily applied to existing equipment. It has the effect of

[Brief explanation of the drawing]

The drawing shows one embodiment of the device of the present invention.
The figure is a front view, Figure 2 is a plan view with the hook body open, Figure 3 is an enlarged front view of the main part, Figure 4 is a sectional view taken along the - line in Figure 3, and Figure 5 is Figure 3. FIG. In the figure, 1 is a hanging hook, 2 and 2' are hook bodies, 11 is a chain saw, 15 is a support member, 21' is a saw chain, 28 is a driving hydraulic motor, and 31 is a chain stopper.

Claims (1)

[Scope of utility model registration request] A chainsaw is attached to a gripping hook that can be opened and closed via an actuator, and is movable and adjustable vertically in a substantially horizontal state using a link mechanism, a hydraulic cylinder that operates this link mechanism, and a return mechanism. A movable ball cutting device comprising a cover located on the upper side and stored when the chainsaw is not in use, and almost the entirety including the drive unit is exposed from the cover when the chainsaw is in use, the movable ball cutting device comprising: an outer bar of the chainsaw; The support is located on the lower side near the driving part, is substantially orthogonal to the saw chain of the chainsaw, is narrow in the longitudinal direction of the saw chain, and is long in the orthogonal direction and intersects with the support member to which the bar support is attached. A moving ball cutting device characterized by being equipped with a chain stopper shaped like this.