JPS5933246Y2 - Rotation angle regulating device of chain saw in felling machine - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device for appropriately regulating the rotation angle of the Cheno saw in accordance with the thickness of the tree in a tree felling machine equipped with a Cheno saw.

A work vehicle, such as a frame attached to the boom of a tractor or excavator via a carrier, has left and right holding arms that hold the tree during cutting, and a puncher for holding the cut tree in an upright position (continuous felling work). holding arms and
A felling machine equipped with a cutter for cutting standing trees is known.

However, cutting a standing tree with a cutter may cause cracks in the standing tree, so it is preferable to use a chino saw instead of a canter.

By the way, when cutting a standing tree with a Cheno saw, the standing tree is held between the left and right Cheno saw holders, and the standing tree is cut by the Cheno saw installed in either one of the Cheno saw holders. The opening angle of both chain saw holders differs depending on the thickness of the standing tree.

If the tree is thin and the opening angle of the chino saw holder is small, the rotation angle of the chino saw may be small, but in this case, if the chino saw is rotated without limit, the tip of the chino - Since it collides with the inner wall surface of the holder, it is necessary to regulate the rotation angle of the chino saw according to the opening angle of the chino saw holder.

This invention was made in view of the above-mentioned circumstances, and the purpose is to provide a rotation angle regulating device that can stop the chino saw at an optimal position depending on the opening angle of the chino saw holder. shall be.

Hereinafter, embodiments of this invention will be described based on the drawings.

Figures 1 and 2 show the overall configuration of a felling machine, including a main body frame 1 attached to a boom of a tractor shovel, power shovel, etc. via a carrier (not shown), and this frame 1. A movable chain saw holder 3, 4 attached to the lower front face and equipped with a chino saw 2 for cutting standing trees on one side, and a plurality of movable holding arms 5 that hold and hold the standing tree T on the upper front face of the main body frame 1. 6.7 and a support bracket 8 fixed to the upper front edge of the main body frame 1
, a holding arm 9 for punching work attached to the main body frame 1 at a height between the holding arms 5 and 6, a cheno no holder 3°4 and each arm 5 to 7.9, respectively. Hydraulic cylinder device to be operated 10, 11.12, 13, 14,
It consists of 15.

The main body frame 1 includes a horizontal member IA at the lower end, a central column IB erected approximately at the center of the horizontal member IA, left and right columns 1C11D, an upper horizontal member IE, and a left and right column 1.
It consists of attachment members IF and IG to a carrier (not shown) attached to the rear surface of the C51D, and the horizontal member 1A is box-shaped and opens toward the front.

The saw holders 3 and 4 have a substantially U-shaped cross section, and are attached to the horizontal member 1A of the main body frame 1 so that their openings face each other.
The rear portions of the opposing edges of the holders 3 and 4, whose base ends are pivotally connected to each other by vertical shafts 16 and 17, are formed in a slightly concave shape so that they face each other with a gap when the holders 3 and 4 approach each other. These concave edges 3A, 3B, 4
A, 4B, a standing tree T is held in place.

A saw 7 and saw 2 for cutting standing trees are housed in one of the chains 7 and saw holder 4, and a bracket 2C protruding from the casing 2B of the chains 7 and saw 2 is attached to the vertical axis at the tip of the holder 4. It is pivoted by 18.

The tip of the saw 2A is located on the base end side of the saw 7/saw holder 4, and rotates around the vertical shaft 18 of the saw 2AH to move in and out of the holder 4.

Chain 7/Saw rotation hydraulic cylinder device 20, Chain/Saw rotation hydraulic cylinder device 20
It is located above the no-holder 4, and is swingably attached to the upper plate 4C of the no-holder 4 by means of a vertical pin 23.

The tip of the piston rond of this hydraulic cylinder device 20 is located near the hydraulic motor 19 for driving the chain 7/saw 2 provided at the upper part of the casing 2B of the chain 7/saw 2. It is pivotally attached via a vertical pin 22 that protrudes upward from the notch 4E.

The operation of this hydraulic cylinder device 20 causes the chino saw 2 to
rotates about a vertical axis 18.

The motor 19 is provided to protrude upward from the notch 4E of the chain 7/saw holder 4.

Referring to FIGS. 2 to 5, check the stopper 24 for restricting the rotation of the chain 7 and the saw, and the bracket 2C of the casing 2B.
, and is rotatably mounted on a vertical shaft 18 .

One end of a connecting rod 25 is pivotally connected to one end of this stopper 24 by a pin 26.

There is a stopper operating lever 27 on the base end side of the holder 4.
This has a substantially rectangular shape when viewed from above, and its central portion is rotatably attached to the lower surface of the upper plate 4C of the chain 7/saw holder 4 by means of a vertical shaft 28.

One end of the stiff lever 2T has a connecting rod 25, and the other end is a pin 29.
are connected by.

The length of the driving rod 30 is adjustable, and one end is connected to the other end of the lever 2T by a pin 31, and the other end is connected to the lower surface of the upper plate 3C at the base end of the chain 7/saw holder 3. It is rotatably attached by a pin 32.

As will be detailed later, the position and orientation of the abutment surface 24A of the x topper 24 change depending on the la angle α of the chain 7/saw holders 3, 4. The side surface 2D of is in contact and the rotation of the chain 7 and the saw 2 is restricted.

That is, the rotation angle of the chain 7/saw 2 is regulated according to the opening angle of the chain 7/saw holders 3 and 4, so that the tip of the saw 2A of the chain 7/saw 2 Contact with the inner surface of the side wall of the holder 3 is prevented.

When the rotation of the chino saw 2 is stopped by the stopper 24, the hydraulic oil pressure in the hydraulic circuit (not shown) of the hydraulic cylinder device 20 increases, so the hydraulic oil is released by a relief valve (not shown). It is configured to switch the direction of hydraulic oil supply to the hydraulic cylinder device 20 and return the chino saw 2 to its original state.

Next, the case where a standing tree is felled by this felling machine will be explained.

First, in order to hold the standing tree T3 (Fig. 5), the hydraulic cylinder devices 10 to 15 are operated to
, 4 and open each arm 5, 6, 7, 9.

Next, the felling machine is brought close to the standing tree T3, and after the support bracket 8 is brought into contact with it, the hydraulic cylinder devices 10 to 15 are
Operate Che 7, saw holder 3, 4 and each arm 5~
7 and 9 are closed to hold the standing tree T3.

At this time, the standing tree T3 is the upper and lower edges 3A, 3 of the holder 3.4.
It is also held by B, 4A, and 4B.

The check 7 saw holders 3 and 4 are in the state of opening angle α3 as shown in FIG. 30 in the direction of arrow A, and the end of the stopper 24 is pulled via the connecting rod 25,
Stopper 24 is positioned at the position shown at 83 in FIG.

After achieving this state, the Cheno Saw 2 is rotated by starting the drive hydraulic motor 19, and the hydraulic cylinder device 20 is operated to move the Cheno Saw 2 into the Chain 7.
- Rotate in the direction of saw holder 3 and push out.

When the cutting of the tree T3 is completed, the casing side surface 2D of the cutter 7/saw 2 is brought into contact with the stopper contact surface 24. Upon hitting A, Chess 7 and Saw 2 stop at position A3.

In this way, the chino saw 2 is stopped with the minimum necessary rotation, so that it does not collide with the inner wall surface 3D of the chisel 7 saw holder 3.

When the chino saw 2 stops, the direction of hydraulic oil supply to the hydraulic cylinder device 20 is switched, and the chino saw 2 rotates in the opposite direction and returns to its original position.

When the thickness of the trees T is different, for example, T1.
When felling the standing trees shown in T2,
Opening angle α1 of holders 3 and 4. Stopper 2 corresponding to α2
The position of 4 also changes like Sl, S2, Cheno Saw 2
They stop at the positions Al and A2 (rotation angles θ1 and θ2), respectively, so that the tip of the saw 2A of the saw 2 does not collide with the inner wall surface of the saw holder 3.

Figure 6 shows another embodiment of this invention,
For example, it is pivotally mounted coaxially with the rotation shaft 101 of the chino saw holders 3 and 4.

Further, a hydraulic cylinder device 20 for rotating the chino saw is located on the chino saw holder 3 side, and its base end is pivotally connected to a bracket 102 fixed to the side wall 3E of the chino saw holder 3 by a pin 23. , this cylinder device 20
The tip of the piston rod 21 is attached by a vertical pin 22 to a bracket 103 fixed to the chino housing 2B.

The stopper 104 for regulating the rotation of the chino saw is fixed to the inner surface of the side wall 4D of the chino saw holder 4.

In this embodiment, the stopper 104 is provided at a position where the rotation angle θ of the chino saw 2 becomes equal depending on the size of the opening angle α of the chino saw holders 3 and 4.
The tip of the saw 2A of the chino saw 2 does not collide with the inner surface of the side wall 4D of the china saw holder 4.

As mentioned above, this invention is equipped with a plurality of movable holding arms 5, 6.7 for holding a standing tree T on the front side of a main body frame 1 attached to a working vehicle, and a chino saw 2 for cutting the standing tree on one side. In a felling machine equipped with left and right movable chino saw holders 3 and 4 that are rotatable, the chino saw 2 is rotated according to the opening angle α of the chino saw holders 3 and 4. The stoppers 24 and 104 that regulate the angle θ are chino saws.

Since it is installed in the holder 4, the thickness of the standing tree T, that is, the Cheno saw holders 3 and 4 that hold it.
The rotation angle α of the Cheno saw 2 is automatically regulated by the stopper 24.104 according to the opening angle α of Not only does felling work become easier, but the tip of the saw 2A of the Cheno Saw 2 does not collide with the Cheno Saw holder, which prevents damage and prolongs the life of the saw. You can expect good results.

[Brief explanation of the drawing]

Figures 1 to 5 show examples of this invention.
Figure 1 is a front view of the felling machine, Figure 2 is a plan view of the same, and Figure 3 is a front view of the felling machine.
The figure is a plan view showing the main parts of this invention, Figure 4 is a partially cutaway right side view of Figure 3, Figure 5 is an explanatory diagram of the operation cut along the line ■-V in Figure 4, and Figure 6 The figure is a plan view showing another embodiment of this invention. 1... Body frame, 2... Cheno.
Thor 3.4... Cheno No Holder, 5,6
, 7... Movable holding arm, 10, 11, 12, 13
,14゜20...Hydraulic cylinder device, 20,1
04... Stopper, T, T1-T3...
- Standing tree, α, α1-α3... Cheno saw holder opening angle, θ, θ1-03... Cheno saw rotation angle.

Claims (1)

[Scope of utility model registration request] A plurality of movable holding arms 5, 6°T for holding a standing tree T are mounted on the front side of the main body frame 1 attached to a work vehicle, and left and right movable chains 7, saws, and the like are equipped with a chopping machine 7 and a saw 2 for cutting standing trees on one side. In a felling machine that is rotatably equipped with holders 3 and 4, a stopper 24 regulates the rotation angle θ of the chino saw 2 according to the opening angle α of the chino saw holders 3 and 4.
, 104 are provided on the Cheno saw holder 4,
A rotation angle regulating device for a Cheno saw in a felling machine.