JPH0328755Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a slip-prevention tire structure for a pruning machine.

(b) Conventional technology Conventionally, the anti-slip tire structure for pruning machines includes those in which treads are formed on the circumferential surface of the rubber tire body, or spikes, chains, wires, etc. are attached to the circumferential surface of the rubber tire body. These treads, spikes, chains, wires, etc. dug into the surface of tree trunks and prevented the rubber tires from slipping.

(c) Problems to be solved by the invention In the above-mentioned conventional technology, when the slip prevention tire structure of the pruning machine is treaded, the tire is made of rubber, so it is flexible and can easily follow the unevenness of the trunk surface. In the case of spikes, although they are reliable in preventing slippage, they have the disadvantage of damaging the trunk, and in the case of chains, wires, etc., it is difficult to follow the unevenness of the trunk surface, and furthermore, the tire body It has the disadvantage that it is difficult to securely attach and support it.

(d) Means for solving the problem In this invention, the tree trunk is held between the drive tire and the auxiliary tire, and the tree trunk is moved up and down in a spiral by the rotation of each tire. In the machine's anti-slip tire structure, a tire body mounting groove with a substantially U-shaped cross section that opens toward the outer circumference is formed on the wheel rim, and a rubber material is injected into the opening of the mounting groove to form a rubber tire body. In the rubber tire body, a large number of slip prevention plates are arranged in a partition shape at regular intervals in the circumferential direction, and the tips of the slip prevention plates are partially protruded from the peripheral side of the rubber tire body, and slip prevention In the center of the board
It is an object of the present invention to provide a slip-prevention tire structure for a pruning machine in which a rubber tire engaging hole is bored and a rubber tire body is integrally connected through the rubber tire engaging hole.

(E) Function/Effect According to the present invention, when the pruning machine is attached to the trunk of a tree and the rotation of each tire moves the pruning machine up and down in a spiral along the outer circumference of the trunk, the focusing surface of the rubber tire body is In addition to being in close contact with the surface of the trunk, the tip of the slip prevention plate digs into the trunk surface to prevent slips, and the slip prevention plate follows the unevenness of the trunk surface through the flexibility of the rubber tire body. It is movable and can buffer the swinging of the pruning machine.

In addition, in such a pruning machine, in order to move the pruning machine up and down in a spiral along the outer circumference of the trunk, each tire is attached to the pruning machine so as to be inclined with respect to the center line of the trunk. There is a problem in that a lateral force is applied to the tire due to the weight of the pruning machine, causing the tire body to deform in the lateral direction, resulting in a misalignment between the tire mounting direction and the traveling direction.

Therefore, in the present invention, by making the tire body mounting groove substantially U-shaped in cross section, the side surfaces of the tire body are supported by the rim, thereby increasing the lateral rigidity of the tire body.

Therefore, even if the rubber of the tire body is made of soft rubber that has good ability to follow the irregularities of the tree trunk, deformation of the tire body due to the weight of the pruning machine can be prevented, and the slip prevention plate Combined with the slip prevention effect, the pruning machine can be raised and lowered accurately.

(G) Example The example of the present invention will be explained in detail based on the drawings.
A shows a pruning machine as a type of power working machine, and this pruning machine A connects a main frame 1 and an auxiliary frame 2 via a connecting pipe 3 so as to be able to approach each other freely, and also connects a main frame 1 and an auxiliary frame 2 via a tension spring 4. drive tires 5 are arranged with the main body frame 1 tilted vertically and horizontally, and three caster-type auxiliary tires 6 are arranged at the top and bottom of the auxiliary frame 2, In addition, an engine 7 is disposed on the back of the main body frame 1, and a cutting section 9 that rotatably supports a chain saw 8 is disposed on the upper part of the main body frame 1. , compresses the trunk B between the drive tire 5 and the auxiliary tire 6, and also compresses the engine 7.
The driving tire 5 and the chain saw 8 are driven by the power of the machine, and the branch b of the trunk B is cut by the chain saw 8 while climbing the trunk B in a spiral manner.

Here, the structure of the drive tire 5 will be explained as follows.

That is, the drive tire 5 has a shaft mounting hole 11 formed in the center of the wheel 10 and
Both side rim flanges 12 on both sides at the circumferential edge of the
Tire main body mounting groove 1 having a roughly shaped cross section and forming 13
4, and a large number of slip prevention plates 15 made of metal such as aluminum are arranged radially within the mounting groove 14 at constant intervals in the circumferential direction. The slip prevention plate 15 has a wide distal end, a slightly narrow proximal end, and a circular rubber tire engaging hole 16 in the center.
is installed.

Further, a rubber tire body 17 is fitted and attached to the tire body mounting groove 14 with its peripheral portion protruding from the groove 14, and the rubber tire body 17 has a rubber material in the groove 14. The internal structure of the rubber tire main body 17 formed by welding between the slip prevention plates 15 and 15 is made continuous through the rubber tire engagement hole 16,
A slip prevention plate 15 is supported on a rubber tire body 17. Further, at this time, the tip end 18 of the slip prevention plate 15 is slightly projected from the peripheral side surface 19 of the rubber tire body 17. In addition, a recessed portion 25 is formed inwardly at a constant interval in the circumferential direction on both side rim flanges 12 and 13, and the slip prevention plate 15 is disposed in the opposite portion of the recessed portion 25.

Note that the end edges of both side rim flanges 12 and 13 are bent inward to form a locking portion, and the locking portion is bitten into the rubber tire body 17 to attach the rubber tire body 1.
7 may be reinforced.

The auxiliary tires 6 having the above structure are supported on the main body frame 1 by respective shafts 21 inclined at an angle of 30 degrees with respect to the vertical direction, and the upper drive tire 5 is connected to the gearbox from the engine 7. 22
The lower drive tire 5 is driven by a chain 23 that is interlocked with the gear box 2.
2 through a linkage rod 24.

Further, the structure of the drive tire 5 may be other than that shown in FIG.
The anti-slip plate 15 is formed in a tapered shape that contracts downwardly, and the slip prevention plate 15 is also formed in a substantially triangular shape. Incidentally, the circumferential side surface 19 of the rubber tire body 17 is formed at an angle of 30 degrees with respect to the shaft 21.

It should be noted that the present invention is not limited to the above embodiments, and may be used in vehicles, power carriers, seeding machines, rice transplanters, etc.

The embodiment of the present invention is constructed as described above, and the tension spring 4 urges both frames 1 and 2 in the direction of relative proximity to each other, and the driving tire 5 and the auxiliary tire 6 are connected to each other. The machine is mounted and supported on the trunk B by pinching the trunk B between them, and the rotation of the drive tire 5 climbs the trunk B in a spiral shape, and the chain saw 8 cuts the branch b. The circumferential side surface 19 of the tree is brought into close contact with the surface of the trunk B, and the tip 18 of the slip prevention plate 15 bites into the surface of the trunk B to prevent slipping, allowing smooth pruning work. Also, at this time, the slip prevention plate 15 bites into the surface of the trunk B by following the irregularities on the surface of the trunk B, with the tip of the slip prevention plate 15 fitting into the surface of the trunk B.
This allows for smoother pruning work. In addition, since the slip prevention plate 15 is made of a metal material such as aluminum, it has excellent durability, and the rubber tire body 17 is connected and supported through the rubber tire engagement hole 16, so the structure is simple. However, the slip prevention plate 15 can be securely mounted and supported.

[Brief explanation of the drawing]

Fig. 1 is a front view of an embodiment of the present invention, Fig. 2 is a plan view of the same, Fig. 3 is a partially cutaway front view of a drive tire of the same example, Fig. 4 is a sectional view taken along the line of Fig. 3, and Fig. 5 4 is a sectional view taken along the line in FIG. 4, and FIG. 6 is a longitudinal sectional view of another embodiment of the drive tire. A: pruning machine, 10': rim, 14: tire body mounting groove, 15: slip prevention plate, 16: rubber tire engagement hole, 17: rubber tire body, 18: tip, 19: circumferential side.

Claims (1)

[Scope of utility model registration request] In the anti-slip tire structure of a pruning machine, the tree trunk B is sandwiched between a driving tire 5 and an auxiliary tire 6, and the tree trunk B is raised and lowered in a spiral manner by rotation of each tire 5, 6. , wheel 10
A tire body mounting groove 14 having a generally U-shaped cross section and opening in the outer circumferential direction is formed in the rim 10' of the tire body, and a rubber material is melted into the opening of the mounting groove 14 to form a rubber tire body 17. A large number of slip prevention plates 15 are disposed in the main body 17 at regular intervals in the circumferential direction in the form of partitions.
5, the tip 18 is partially protruded from the peripheral side surface 19 of the rubber tire body 17, and a rubber tire engagement hole 16 is bored in the center of the slip prevention plate 15, and the rubber tire body 17 is inserted through the rubber tire engagement hole 16.
The pruning machine's slip prevention tire structure is made by connecting the two together.