JPS61105277A - Rubber crawler for paddy field - Google Patents

Abstract

PURPOSE:To improve the traveling performance by installing a bending suppressing band in fleshed-up form onto the inner peripheral side in the vicinity of the boundary position between the hardly bent part at the center part including a core metal and the bendable wing parts at the both edges, thus increasing the width of a crawler without increasing the weight. CONSTITUTION:A rubber crawler body 1 consists of a core metal 2, steel cords 3, and the longer lugs 4 and the shorter lugs 4' installed alternately, keeping a certain interval, on the grounded surface side. A bending suppressing band 5 which protrudes in fleshed-up form with a certain width is installed onto the inner peripheral side in the vicinity of the boundary position between the hardly bent part of the center part Y-Y and the bendable wing parts on the both edges. A concaved part 6 is drilled at the position corresponding to the longer lugs 4 on the inner peripheral side of the bending suppressing belt 5, and the mud separating action on the grounded surface side can be developed effectively. The outer edge part of the steel cord 3 is installed so as to protrude by a certain range (f) from within the projection range of the bending suppressing band 5, i.e., outside the both edge parts of the core metal 2.

Description

[Detailed description of the invention] The present invention relates to a rubber crawler for wet fields.

Rubber crawlers for wet fields have relatively wide crawler widths, and accordingly, a core metal with a longer core metal length is used, but this increases cost and weight.

However, increasing the weight goes against the purpose of increasing the crawler width and increasing buoyancy.
If the core metal length is not made long, the wide rubber part of the crawler will bend upwards significantly at both ends of the core metal, causing the aircraft to sink, increasing running resistance and reducing traction force. This can lead to problems such as.

The present invention aims to solve the above problems,
The feature is that an anti-bending band is provided that protrudes with a certain width on the inner circumference near the boundary between the hard-to-bend center part including the core metal and the easily-bendable wing parts at both ends. The outer end of the steel cord bundle is located within the projection area of the anti-bending band.

Hereinafter, an example of implementing the present invention will be described based on the accompanying drawings.

Figure 1 is a top view, Figure 2 is a bottom view, Figure 3 is the X in Figure 1.
4 is a sectional view taken along the Y-7 line in FIG. 1, and FIG. 5 is a plan view of another example.

In each figure, 1 is a rubber crawler main body, 2 is a core metal, 3 is a steel cord, and 4 and 41 are long lugs and short lugs provided alternately at regular intervals on the ground surface side. Since the rubber crawler is used for wet fields, the crawler width l is wider than that for general use, and the long lug 4 and short lug 4' are on the corresponding ground surface side where the core bar 2 is buried. They are arranged alternately.

Although the central part where the core metal is buried is difficult to bend,
The wider the end portions are, the more likely they are to bend upward, but in order to prevent this, in the present invention, the inner part near the boundary between the hard-to-bend central part and the easily-bendable wing parts at both ends is An anti-bending band 5 is provided on the circumferential side and protrudes in a built-up manner with a constant width. In this case, the bending prevention band 5 is provided intermittently with a constant width ◎ in Fig. 1, but the
They may be provided in a continuous state as shown in the figure.

Reference numeral 6 denotes a recess formed at a position corresponding to the long lug 4 on the inner circumferential side where the anti-bending band 5 is provided, so that mud removal from the contact surface side is effectively performed. It's what you do. Specifically, the long lug is formed into a triangular lug with wing parts f and f that extend from the central boundary in the left and right direction, and the rigidity increases as the base width increases. In order to prevent the weight from increasing due to the increase in rubber material, a groove-shaped recess 7 is bored at the corresponding location on the opposite side (inner circumferential side). It is. At this time, the grooves of the concave portion 7 exhibit a lip action that resists bending in the width direction, and the resistance force received at this time provides an effective mud-shedding action on the ground surface side.

In the present invention, as shown in FIG. 3, the outer end of the steel cord 3 is arranged so that it protrudes into the projection area of the anti-bending band, that is, both ends of the core bar 2 also protrude outward by a certain length range f. This has a bridging effect between the core metals, increases the rigidity of the anti-bending band 5, and is extremely effective in reducing the fall of the rolling wheels and vibration. be.

The present invention is constructed as described above, and even if the crawler width is increased especially for use in wet fields, there is no need to increase the length of the core metal or increase the amount of rubber material, that is, it is lightweight. It can be made into a rubber crawler product that is rigid and can reduce costs.

[Brief explanation of the drawing]

The attached drawings show a rubber crawler for wet fields according to the present invention, in which Fig. 1 is a plan view, Fig. 2 is a bottom view, Fig. 3 is a sectional view taken along the line X-X of Fig. Y-Y line sectional view of the figure,
FIG. 5 is a plan view of another example. 1... Rubber crawler body 2... Core metal 3.
...Steel cord 4...Long lug 4'...
Short lug 5...Anti-bending band 6...Concave Patent applicant: Fukuyama Rubber Industries Co., Ltd. Figure 1

Claims (3)

[Claims] (1) In a crawler where the core metal and steel cord are embedded in the rubber material, and long and short lugs are alternately provided on the ground side, the core metal is relatively wide compared to the length of the core metal. It is characterized by forming a continuous or intermittent overlay-like anti-bending band with a constant width on the inner circumferential side near the boundary between the hard-to-bend central part including the wing parts and the easily-bendable wing parts at both ends. A rubber crawler for wet fields. (2) The rubber crawler for wet fields according to claim 1, wherein the outer end of the steel cord bundle is located within the projection area of the bending prevention band and is curved in the direction of the bending prevention band. (3) Claim 1, characterized in that the length of the long lug increases at the boundary part on the way from the central part to the wing part, and a recessed part is bored on the inner peripheral side corresponding to the part. A rubber crawler for wet fields according to item 1 or 2.