JPS60172237A - Pruning machine equipped with rising height detector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention] (11. Industrial Application Fields) The present invention involves cutting a tree with a chainsaw while ascending along the tree trunk with its own blade, and when a predetermined height is reached, the diameter of the tree trunk is cut. This invention relates to a mining machine equipped with a rising height detection device that can automatically detect the height and lower the machine.

(2) Prior Art Conventional pruning machines are also capable of detecting the rising height and switching the drive from ascending to descending.

Usually, a mechanical timer is used as the detection means.

The pruning machine is equipped with a timer setting dial, and the operator looks at the tree to be pruned and sets the height to be pruned by operating the dial.

The pruning machine ascends along the green tree for a set time, and after the set time has elapsed, the clutch is switched by the operation of a timer and it descends.

However, with such a timer method, if the trunk is wet from rain or there are uneven surfaces, the wheels may slip and the machine may descend without being able to complete the technique to the target height. Sometimes. On the other hand, there are times when you make a mistake in your estimation and end up pruning excessively.

On the other hand, it is said that pruning workers decide the height to be pruned by estimating how old the tree is, and this is said to be done by looking at the diameter of the tree's trunk. Therefore, it is difficult to ensure perfection using the above timer method.

(3) Purpose The present invention was made in view of the above-mentioned circumstances, and includes installing a sensor capable of detecting the diameter of a tree trunk in a pruning machine, and the output from this sensor reaching a predetermined value. In other words, when the pruning machine reaches the desired height of the trunk diameter, the pruning ends.This eliminates the inconvenience that previously occurred. Then, it is a pruning machine that can be lowered automatically, and as a means of detecting a predetermined height, it uses a sensor that can detect changes in the diameter of the trunk, such as a potentiometer and an actuator to operate it, Fix the potentiometer to the pruning machine and keep the actuator in contact with the tree trunk.

Then, as the pruning machine rises, the trunk diameter becomes smaller, and this is detected by a potentiometer via an actuator.

Then, the trunk diameter at the height to be pruned can be set in advance, and when the detected value of the potentiometer measured via the actuator matches this set value, the driving direction of the pruning machine can be changed, for example, when the drive wheel This is an attempt to reverse the situation.

(5) Effects According to the present invention, the pruning machine can be raised until a predetermined trunk diameter is reached using the sensor installed in the pruning machine.

Therefore, regardless of whether there is a slip in the wheel, an error in the timer setting by the operator, etc., pruning can always be performed to the desired height for the tree.

In addition, since the height of pruning is determined by the trunk diameter, the pruning operator is familiar with the pruning process, and it is extremely easy to handle.

(6) Examples Specific examples of the present invention will be described below with reference to the drawings.

1 and 2 show a pruning machine according to the invention.

This pruning machine has a main arm IO and a wrapping arm 12 that form a circle or frame that can surround a tree trunk 14 with a spring 13, and the main arm 10 has a driving wheel 16 with a constant lead angle. Idler wheels 18 are attached to each of the winding arms 12, and the outer periphery of the trunk 14 is elastically held by these wheels 16,18.

Further, in the figure, reference numeral 20 is a prime mover, and this power is reduced in speed within a transmission case 22, and driven by a drive wheel 16 and arms 10, 12 to a chain saw 24 vertically disposed above.
transmitted to.

When this pruning machine is attached to the trunk 14 and the prime mover 20 is started, the drive wheels 16 rotate and climb up the trunk 14 in a spiral manner, and the chain saw 24 cuts off the branches on the way up. Become.

Next, Figure 3 shows the power transmission mechanism of the pruning machine.
This mechanism outputs the power of the prime mover 20 via a centrifugal clutch 26 or directly, and includes a chain saw transmission path A1 that operates a chain saw 24 that is linked to the output shaft 28, and a drive wheel 16 that is linked to the output shaft 28. and a transmission path B for forward and reverse rotation of the drive wheels to which power is transmitted.

The chainsaw transmission path A transmits power from the output shaft 28 led into the case 22 to a drive shaft 32 via a known centrifugal clutch or torque limiter 30, and projects the drive shaft 32 outside the case 22, Chain saw on the protruding part
24 is fitted with a sprocket 34 for operating the shaft.

The drive wheel forward/reverse transmission path B is fixed to the output shaft 28 (
The gear 36 fixed to the transmission shaft 38 and the gear 40 fixed to the transmission shaft 38 are constantly meshed to transmit power, and the gear 42 of the shaft 38 and the gear 46 of the shaft 44 are meshed to reduce the speed, and the gear 48 fixed to the shaft 44 is A sprocket 54, which is also fixed to the shaft 44, is meshed with a gear 52 loosely fitted to the drive axle 50, and a sprocket 56 loosely fitted to the axle 50 is connected by a chino 58, and an electromagnetic The gear 52 or sprocket 56 is engaged with and disengaged from the axle 50 through the interposition of the clutch 60.
The purpose is to switch the motor to either forward rotation, reverse rotation, or neutral rotation.

Here, the electromagnetic clutch 60 is operated by a rising height detection device as shown in FIG.

In FIG. 4, 62 is a sensor capable of detecting changes in the diameter of the trunk, specifically a potentiometer. As shown in FIGS. 1 and 2, the sensor 62 has a main body 64 fixed to the main frame 10 of the pruning machine, and a detection arm 66 protrudes from the main body 64 and contacts the trunk 14.

Therefore, a change in the trunk diameter that changes as the pruning machine moves up is detected by the potentiometer 62 as a change in resistance value.

Further, 68 is a rising height setting device, specifically a potentiometer similar to a sensor. This is equipped with a dial consisting of a knob 70 and a scale 72 as shown in FIG. 5, and the knob 700 pointer is set along the scale 72 carved as the stem diameter.

The resistance values of both potentiometers 62 and 68 are compared by a controller 76 driven by a battery 74, and when the pruning machine is raised and the detected value of the potentiometer 62 matches the set value of the potentiometer 68, the controller 76 captures this. Then, the electromagnetic clutch 60 is operated, and the power from the gear 52 side is switched to the power from the sprocket 56 side.

Note that 78 is an engine stop switch, and sensor 62
When the pruning machine detects the maximum diameter of the trunk when originally installed, that is, when the pruning machine has fully descended, the controller 76
It is made into FF.

(Thus, the tree is pruned to the height of the desired trunk diameter, which eliminates the problem of excess or deficiency in the height of the technique caused by the wetness or unevenness of the trunk, which is the case in the past, and it is possible to always perform the appropriate technique. It is something.

[Brief explanation of drawings]

Fig. 1 is a front view of the pruning machine according to the present invention, Fig. 2 is a plan view, Fig. 3 is an explanatory diagram of the power transmission path, Fig. 4 is a block diagram of the rising height detection device, and Fig. 5 FIG. 2 is an explanatory diagram of a dial used in the rising height detection device. 14... Stem diameter 60... Electromagnetic clutch 62... Sensor 64... Sensor main body 66... Sensor detection arm 68... Rise height setting device 70... Knob 72...・Scale 76・・・Controller representative Patent attorney Omura' EIKEN Figure 1 Figure 2 Figure 20 - Figure 3

Claims (1)

[Claims] As a means for detecting the predetermined height in a pruning machine that can cut the tree with a chainsaw while ascending along the tree trunk with its own blade, and automatically lowers when it reaches a predetermined height. , a sensor capable of detecting changes in the diameter of the trunk is used, the body of the sensor is fixed to a predetermined position of the pruning machine, and the detection arm of the sensor is protruded to a position where it can come into contact with the trunk, and the pruning machine A rise height setting device is provided that can manually adjust the position from rise to fall according to the diameter of the trunk, and a match between the detection value of the sensor and the setting value of the rise height setting device is detected. A pruning machine equipped with a rising height detection device, characterized in that it is provided with means for switching the driving direction of the pruning machine.