JPH0430008Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a powered hydraulic wood splitting device.

(Conventional technology) The conventional technique will be explained with reference to FIG.

108 is an engine, which serves as a power source for the hydraulic pump 106. Hydraulic pump 106 supplies hydraulic pressure necessary for extending and retracting rod 114 of hydraulic cylinder 110 to hydraulic cylinder 110 .

The expansion and contraction of the rod 114 is switched by changing the position of the spool 102 of the hydraulic switching valve 104.

When the operating lever 100 is set to the neutral position at one end of the spool 102, no hydraulic pressure is applied to the hydraulic cylinder 110 and the movement of the blade 116 is stopped.

(Problems to be solved by the invention) However, the above-mentioned conventional technology has the following problems.

To split wood, a blade fixed to the rod end of a hydraulic cylinder moves forward to split the wood, moves back, stops, and places the next piece of wood on the bed, repeating the process of moving the blade. It is very troublesome to have to move the control lever every time.
Furthermore, if the operation is incorrect, it is extremely dangerous and poses a major safety problem.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a wood splitting device in which the lever is operated only to move the blade forward, and when the operating lever is released, the blade is automatically moved back and stopped at a predetermined position.

(Means for solving the problems) In order to solve the above problems, the present invention has the following configuration.

That is, the present invention provides a wood splitting device in which a blade attached to a rod is advanced toward firewood placed on a bed by rotating an operating lever and driving a hydraulic cylinder. The operating lever is provided so as to be rotatable between three positions of a forward position, a neutral position, and a retracted position of the blade, and an arm whose one end is connected to the operating lever is rotatable at an appropriate position on the base body. A spring is disposed between the arm and the base body, and is provided with a spring that urges the operating lever to rotate to the backward position at all times via the arm. A regulating member that presses the other end of the arm, which is on the retreating path of the blade when it retreats, against the biasing force of the spring, and rotates the operating lever from the retreating position to the neutral position via the arm. It is located in a firewood splitting device characterized by being arranged.

(Operation) Next, the operation will be explained with reference to FIGS. 1 and 2. FIG. 1 shows a firewood splitting device according to the present invention. FIG. 2 is a diagram showing the operating section of the wood splitting device according to the present invention, in which the blade 40 is in a stopped state, that is, the operating lever 10 is in a neutral position. At this time, the line formed with the shaft 18 of the arm 12, which is connected to the operating lever 10 and rotatably attached to a shaft 18 provided on a stay 16 forming a part of the base body, is D0. At this time, the spool 14 is fixed to the hydraulic switching valve 28,
Extension/contraction and stopping are selected using the operating lever 10.

When the wood to be used as firewood is placed in an appropriate position on the bed 42 and the operating lever 10 is set to the forward position of the blade 40, the spool 14 also moves as the operating lever 10 moves, and the hydraulic switching valve 28 causes the rod 38 of the hydraulic cylinder 34 to move. As the rod 38 is switched to apply hydraulic pressure in the direction of extension, the rod 38 is extended and the blade 40 fixed to the tip breaks the wood placed on the bed 42.

After splitting the wood, the operating lever 10 is set to the retracted position and the blade 40 is retracted.

When the wood splitting is finished, the operating lever 10 is in the neutral position.

In order to advance the blade 40, move the operating lever 10 in the direction of arrow G, and the line formed with the axis 18 of the arm 12 becomes EO, and the spool 14 moves in the direction of arrow A, and the hydraulic switching valve 28 moves to the rod 38 of the hydraulic cylinder 34. Since hydraulic pressure is applied to extend the blade 40, the blade 40 moves forward.

After splitting the wood, when the operating lever 10 is released, the spring 20 is constantly biased to rotate the arm 12 in the direction of arrow C, so the shaft 1 of the arm 12
The line made with 8 becomes FO, and the spool 14 moves in the direction of arrow B, and the hydraulic switching valve 28 moves to the hydraulic cylinder 34.
Since hydraulic pressure is applied to shorten the rod 38, the blade 40 moves backward.

An upper projection 24 is provided on the upper part of the blade 40, and the upper projection 24 comes into contact with the stopper 22 and presses the stopper 22 on the path of the blade 40 retreating. As a result, the spool 14 moves slightly in the direction of arrow A via the arm 12 with the stopper 22 fixed to its tip and the operating lever, and the hydraulic switching valve 28 becomes neutral, stopping the movement of the blade 40. .

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, the configuration will be explained in detail.

In FIG. 1, 32 is an engine, which is a power source for the hydraulic pump 30. As shown in FIG. Hydraulic pump 30 provides hydraulic pressure for extending and retracting rod 38 of hydraulic cylinder 34. The expansion and contraction of the rod 38 is selected by the position of the spool 14 of the hydraulic switching valve 28.

One end of the spool 14 is rotatably fixed to the operating lever 10. Reference numeral 16 denotes a stay, one end of which is fixed to the main body of the device and forms a part of the base body.

Reference numeral 12 denotes an arm, which is connected to an operating lever 10 provided at an appropriate position on the stay 16, and a stopper 22 made of a bolt is inserted into and fixed at one end of the arm, and the length of the stopper 22 that protrudes can be changed by rotating it. obtain.

A spring 20 constantly biases the end of the arm 12 on the stopper 22 side to rotate toward the end of the stay 16.

A blade 40 is fixed to the tip of the rod 38 and slides along a rail provided on the surface of the bed 42. Further, a lower protrusion 26 is loosely fitted to the rail.

24 is an upper projection which protrudes from the upper part of the blade 40, and when the blade 40 retreats, it comes into contact with the stopper 22 on the retreating path of the blade and stops the stopper 22.
Press. That is, the upper protrusion 24 moves the stopper 22 provided at the tip of the arm 12 to the spring 2 so that the operating lever 10 is rotated from the retracted position to the neutral position via the arm 12.
It acts as a regulating member that presses against zero biasing force.

42 is a place where the wood to be split is placed and fixed in the bed.

Next, the operation will be explained.

The wood to be split is fixed at an appropriate position on the bed 42.

Power from the engine 32 is transmitted to the hydraulic pump 30.

Next, a description will be given based on FIG. 2.

In the stopped state, the spool 14 of the hydraulic switching valve 28 is in the neutral position, and no hydraulic pressure is accumulated in the hydraulic cylinder 34.

Furthermore, the position of the arm 12 is such that the line between the arm 12 and the axis 18 is at the DO position.

To move the blade 40 forward to split wood, move the operating lever 10 in the direction of arrow G, and the spool 14
moves in the direction of arrow A, and the hydraulic switching valve 28 acts to apply hydraulic pressure to extend the rod 38 of the hydraulic cylinder 34. In this case, axis 1 of arm 12
The line made with 8 becomes EO. The rod 38 is extended by applying hydraulic pressure to extend it, and the blade 40 fixed to the tip thereof slides along the rail of the bed 42 and splits the wood.

To move the blade 40 backward, when you release your hand from the operating lever 10, the arm 12 is moved by the effect of the spring 20.
The tip of the arm 12 rotates in the direction of arrow C.
The line formed by and shaft 18 is FO, and since the spool 14 moves in the direction of arrow B, the hydraulic switching valve 28 works in the opposite way, that is, it applies hydraulic pressure to shorten the rod 38 of the hydraulic cylinder 34, so that the blade 40 moves toward the bed. It slides back along the rail provided at 42. At this time, when the upper protrusion 24 provided on the upper part of the blade 40 that is retreating comes into contact with the stopper 22, the tip of the arm 12 moves slightly in the direction opposite to the arrow C due to the effect of the stopper 22. Therefore, the spool 14 moves slightly in the direction of arrow A, and when the hydraulic switching valve 28 becomes neutral, no hydraulic pressure is applied to the hydraulic cylinder 34 and the movement of the blade 40 stops.

Continue chopping wood by repeating the above steps.

If the firewood splitting device mentioned in this example is used, the blade 40
Reverse and stop operations are automatically performed by simply manually operating the forward drive, so the user does not have to be careful when reversing and stopping, and can operate safely.

FIG. 3 shows a view of the blade 40 from behind. Reference numeral 24 designates an upper projection which not only acts to push the stopper, but also serves as an auxiliary function for splitting the wood when the diameter of the wood is wider than the width of the blade 40.

The lower protrusion 26 not only prevents the hydraulic cylinder from coming off the rail 44, but also prevents the rod of the hydraulic cylinder from swinging vertically and horizontally.

If the stopper ring 20 (see FIG. 1 or 2) becomes elongated after long-term use and the stop position shifts, the bolt of the stopper 22 can be adjusted to set the stopper to an appropriate stop position.

Furthermore, when splitting short pieces of wood one after another, the stroke of the blade 40 can be shortened by moving the stopper 22 forward to shorten the retreat distance.

Although the present invention has been variously explained above with reference to preferred embodiments, the present invention is not limited to these embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. It is.

(Effect of the invention) According to the wood splitting device according to the invention, the operation of the operating lever only requires the operation of moving the blade forward, and the operations of retracting the blade and stopping the blade at a predetermined position are automatically performed. It will be done. Therefore, the workability is significantly improved.

In addition, since the only operation required is the movement of the blade, erroneous operation can be prevented and accidents can be prevented.

[Brief explanation of drawings]

FIG. 1 is a side view of the wood splitting device according to the present invention, FIG. 2 is a side view of the operating section, FIG. 3 is a partial rear view of the blade, and FIG. 4 is a side view of the conventional wood splitting device. 10...operation lever, 12...arm, 14...
... Spool, 16 ... Stay, 20 ... Spring, 22 ... Stopper, 24 ... Upper projection, 4
0...Blade.

Claims (1)

[Scope of Claim for Utility Model Registration] A firewood splitting device in which a blade attached to a rod is advanced toward firewood placed on a bed by rotating a control lever and driving a hydraulic cylinder. In this case, the operating lever is provided so as to be rotatable between three positions of a forward position, a neutral position, and a retreating position of the blade, and an arm having one end connected to the operating lever is mounted at an appropriate position on the base body. A spring is disposed between the arm and the base body so as to be movably pivoted, and a spring is disposed via the arm to bias the operating lever so as to always rotate the operating lever to the backward position. Pressing the other end of the arm, which is on the retreating path of the blade when retreating from the position, against the biasing force of the spring, and regulating the operating lever from the retreating position to the neutral position via the arm. A firewood splitting device characterized by having members arranged therein.