JPH0211137Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a control device for a feed roll in a chipper mainly used to crush down-branched trees.

Trees (branches) that have been pruned or removed from fruit trees, etc.
As shown in FIG. 1, the chipper used for pulverizing
The main shaft 2 is horizontally supported, and on this main shaft 2, there are parallel blade mounting boards 30... and hammer mounting shafts 31 that can be hung across the blade mounting boards 30... and the hammer mounting shafts 31.
A cutting mechanism 3 consisting of a large number of hammer knives 32 rotatably supported in parallel on each of the... is mounted,
At the proximal end of the inner cavity of the supply gutter 4 that supplies material to be cut to the cutting chamber 1, a feed roll 6 is rotatably supported via the main shaft 2 and the deceleration mechanism 5 to rotate at a reduced speed. Then, the tree B to be fed into the supply gutter 4 is forcibly fed into the cutting chamber 1 at a predetermined speed while being held down by the feed roll 6, and the hammer rotating inside the cutting chamber 1 is Crush with knife 32 and cut into cutting chamber 1
A discharge port 10 that is open on the opposite side of the supply gutter 4
The structure is such that it is released as crushed pieces.

This type of chipper A is a cutting mechanism in which a particularly thick trunk part or a hard part of a tree B fed into a supply gutter 4 is fed into a cutting chamber 1 and is rotated in the cutting chamber 1. 3 becomes too much and the engine E
Even when the rotation of the cutting mechanism 3 starts to decrease, the feeding roll 6 continues to forcefully feed the tree B into the cutting chamber 1, so that the feeding roll 6 continues to forcefully feed the tree B into the cutting chamber 1. There is a problem in that the hammer knife 32 becomes jammed and stops the rotation of the main shaft 2, which frequently causes the rotation of the engine E to stop.

For this, a centrifugal clutch is provided between the main shaft 2 and the feed roll 6, and when the rotation of the main shaft 2 decreases due to an excessive load, the centrifugal clutch is installed between the main shaft 2 and the feed roll 6.
When the rotational speed of the engine E returns to the old speed, the centrifugal rotation is again stopped. Although it would be possible to cause the feed roll 6 to perform the feed operation using the clutch, another problem would arise if this was done.

In other words, the centrifugal clutch does not cut off the rotational power completely, but when in the "disconnected" state, the driven side gradually turns around, so it is difficult to cut off the rotational power due to excessive load. Even when the feed roll 6 is in the "off" position, the feed roll 6 performs the feed operation little by little, so that the rotation of the main shaft 2 is stopped when the tree branch that is causing an excessive load is extremely thick. This creates a problem of making it difficult to pull out tree branches B that cannot be cut by the cutting mechanism 3 from the supply gutter 4, and furthermore, it may damage the worker's clothes and hands. is feed roll 6
When the vehicle is pulled in, the problem arises that it gradually draws in deeper, causing serious injury.

The present invention has been developed to solve these problems, and it is possible to control the operation of the feed roll when the tree branches to be supplied create an excessive load on the cutting mechanism. The purpose is to be able to perform the process accurately, to easily pull out the supplied tree branches, and to be able to quickly take action when the worker's clothes or hands get caught in the feed roll. shall be.

Next, the means of the present invention for achieving this object will be described in detail with reference to the drawings.

A main shaft 2 that is horizontally supported on the axial center of the cutting chamber 1 (or crushing chamber) installed in the machine body a of the chipper A.
has one shaft end connected to the output shaft e of the engine E through a transmission pulley 20 and a transmission belt 21 provided therein, and a disc-shaped blade is attached to the part located in the cutting chamber 1. A plurality of boards 30 are supported in parallel, and hammer mounting shafts 31 are mounted parallel to the main shaft 2 on each peripheral edge of the blade mounting boards 30, and each of the hammer mounting shafts 31 is As shown in FIG. 2, a large number of hammer knives 32 are arranged in parallel and rotatably supported, and thereby the main shaft 2
A cutting mechanism 3 is mounted on the main shaft 2 and is rotated by the driving rotation of the cutting mechanism 3. And, at the other shaft end of the main shaft 2,
A centrifugal clutch b is attached, and a transmission pulley 70 is provided to rotate together with the driven side of the centrifugal clutch b, and a reduction shaft 50 is provided at one end of a deceleration shaft 50 horizontally supported at the lower part of the front side of the aircraft body a. A transmission belt 52 is passed between the deceleration pulley 51 and the deceleration shaft 5.
0 is decelerated and driven, and the other shaft end of the deceleration shaft 50 is connected to a conduction sprocket 53, a conduction chain 54, a conduction sprocket 55,
56, conduction chain 57, and conduction sprocket 58, to one end of the rotating shaft 60 of the feed roll 6, which is pivotally supported at the proximal end of the lumen of the supply gutter 4,
This allows the rotating shaft 60 of the feed roll 6 to be moved to the main shaft 2.
is transmitted through the centrifugal clutch b and the speed reduction mechanism 5.

Furthermore, the transmission belt 52, which is routed between the transmission pulley 70 integrated with the centrifugal clutch b provided at the other shaft end of the main shaft 2 and the reduction pulley 51 provided on the reduction shaft 50, is normally connected to the transmission belt 52. A tension pulley 80 is disposed near the belt 52 to loosely route the conduction pulley 70 and the deceleration pulley 51 so as to interrupt the conduction, and tension the conduction belt 52. 91 so that the aircraft a rotates back and forth around the center.
A spring 83 is connected to the lever 82 to urge the lever 82 to rotate in the direction in which the tension pulley 80 presses the transmission belt 52. As a result, the transmission belt 52 rotates the lever 82 against the bias of the spring 83, thereby rotating the main shaft 2 and the deceleration shaft 50.
A belt tension type manual clutch c is constructed to interrupt conduction between the two.

The clutch c is attached to the lever 82 on the front side of the machine body a so that the lever 82 can be rotated about the fulcrum shaft 81 by pressing the foot f of a worker standing in front of the machine body a. Foot petals 84 projecting downward are connected to each other. Also, 85
is an operating portion of the lever 82, and 86 is a guide plate provided on the machine body a to keep the lever 82 in the "off" position.

The control device for the feed roll in the chipper according to the present invention configured as described above operates as follows.

Even if the tree branches B supplied into the supply gutter 4 are subjected to a large load on the cutting mechanism 3, the cutting mechanism 3
If the material is in a range that can be pulverized by the centrifugal clutch b, the centrifugal clutch b stops the feed operation of the feed roll 6 when the load becomes large, and this reduces the load, thereby reducing the load on the main shaft 2 and the engine E. The rotation returns to normal and the process continues until it is crushed.

In addition, if the supplied tree branch B is thick or hard and the load on the main shaft 2 becomes extremely large, making subsequent crushing work difficult, the clutch c can be "disconnected" by operating the lever 82 or the foot petal 84. '', thereby completely cutting off the conduction to the feed roll 6, and in this state, the tree branch B is pulled out from the supply gutter 4.

In addition, when the worker's hands or clothes are caught in the feed roll 6 together with the supplied tree branch B during work, the clutch c is turned off by operating the foot petal 84 or the lever 82 to ensure safety. ensure that

As explained above, the chipper feed roll control device according to the present invention includes a transmission path between the main shaft 2 driven and rotated by the engine E and the deceleration shaft 50 that decelerates and drives the feed roll 6. A centrifugal clutch b interrupts conduction between the main shaft 2 and the deceleration shaft 50 due to a decrease in the rotational speed of the main shaft 2, and a centrifugal clutch b interrupts the conduction between the main shaft 2 and the deceleration shaft 50 by operating the lever 82 or footpetal 84. Since the manually operated clutch c is provided, it is possible to effectively solve the problem of engine E stopping due to load fluctuations, and the problem of engine E stopping due to load fluctuations can be effectively solved.
can be easily pulled out from the supply gutter 4, and injuries can be reliably prevented.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view of the main parts of a chipper that can implement the present invention, and FIG. 2 is a perspective view of the main parts of the same. Explanation of drawing symbols, A... Chipper, B... Tree, a... Airframe, b... Centrifugal clutch, c... Manual clutch, e... Output shaft, E... Engine,
1... Cutting chamber, 10... Discharge port, 2... Main shaft, 2
0...Conduction pulley, 21...Conduction belt, 3...
... Cutting mechanism, 30 ... Blade mounting board, 31 ... Hammer mounting shaft, 32 ... Hammer knife, 4 ... Supply gutter, 5 ... Reduction mechanism, 50 ... Reduction shaft, 51 ...
...Deceleration pulley, 52...Transmission belt, 53,5
5, 56, 58...Conduction sprocket, 54, 5
7...Conduction chain, 6...Feeding roll, 60...
Rotating shaft, 70... Conduction pulley, 80... Tension pulley, 81... Fulcrum shaft, 82... Lever, 83... Spring, 84... Foot petal, 85
...Operation unit, 86...Guide plate, f...Worker's feet.

Claims (1)

[Scope of utility model registration request] Cutting chamber 1 installed in the machine body a with the cutting mechanism 3 installed
One end of the main shaft 2 supported by a horizontal shaft is connected to the output shaft e of the engine E, and the other end of the main shaft 2 and the supply gutter 4
In the conduction path between the deceleration shaft 50 of the deceleration mechanism 5 which decelerates and rotates the feed roll 6 which is pivotally supported at the proximal end of the lumen of the main shaft 2, due to the decrease in rotation of the main shaft 2. A centrifugal clutch b is provided to turn off the conduction between the main shaft 2 and the deceleration shaft 50, and a manually operated clutch c is provided to turn off the conduction between the main shaft 2 and the deceleration shaft 50 by operating the lever 82 or the food pedal 84. A control device for a feed roll in a chipper, characterized in that: