JP2008265369A - Elastic crawler - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce rubber crack on an inner circumferential side of a crawler body caused by a transverse regulating projection in an elastic crawler in which cores are provided with a spacing in the circumferential direction on the rubber-made crawler body formed in an endless strip shape, the transverse regulating projections are provided in the circumferential direction of the crawler body on the front and rear sides in the circumferential direction of the crawler body of each core, and the projecting end side of the transverse regulating projection is engaged in the strip width direction of the crawler body to form a regulating part for regulating the transverse deviation in the strip width direction of the crawler body of the core. <P>SOLUTION: A transverse regulating projection 16A having a regulating part 21 adjacent to a rail part 14R in the strip width direction X of a crawler body is projected in the direction opposite to the expanding direction of the rail part 14R from the core 9B adjacent to the expansion side of the rail part 14R. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an elastic crawler used in a crawler type traveling device employed as a traveling unit of a construction machine such as a backhoe or an agricultural machine such as a tractor or a combine.

  Conventionally, there is a crawler type traveling device in which an endless elastic crawler is wound around a sprocket, an idler, and a wheel, and the sprocket is driven to rotate so that the elastic crawler travels in a circulating manner in the circumferential direction. As an elastic crawler used in a crawler type traveling device, a crawler main body formed in an endless belt shape with rubber, and a core metal disposed in the crawler main body at intervals in the circumferential direction, the core metal, A core metal body embedded in the crawler body, and a pair of left and right anti-roll-off protrusions protruding from the core metal body to the inner peripheral side of the crawler body and positioned on the center side in the band width direction of the crawler body There is.

In addition, as a type of wheel, there is an outer collar type wheel in which the wheel runs on the outer side in the crawler body band width direction of each of the left and right derailment prevention protrusions, and the crawler provided with this outer collar type wheel. In the elastic crawler employed in the type traveling device, the rail portion through which the wheel passes is provided on the outer side in the crawler body band width direction of the left and right derailment prevention protrusions of the core metal.
Further, the elastic crawler is provided with a lateral regulating projection that protrudes from one of the core bars adjacent in the circumferential direction of the crawler body toward the other and a lateral regulating projection that projects from the other to the one of these, And the projecting end sides of the lateral regulating projection provided on the other core metal overlap each other in the crawler body circumferential direction, and the projecting end sides of the lateral regulating projection are engaged in the crawler body band width direction. In some cases, the lateral displacement between the cores is regulated to prevent the elastic crawler from coming off (disengagement of the elastic crawler from the wheel).

The elastic crawler bends in a circular arc along the sprocket and idler at the part wound around the sprocket or idler. However, at the part where the projecting end sides of the lateral restricting protrusions engage with each other, the lateral restriction is provided. Since the protrusion protrudes from the core metal body in the crawler body circumferential direction, the elastic crawler cannot be bent smoothly, and the lateral restriction protrusion serves as a resistance to bending. Further, when the rail portion protrudes from the core metal body in the circumferential direction of the crawler body, the elastic crawler cannot be bent more smoothly, and the rail portion becomes a resistance to bending.
In order to reduce the bending resistance of this elastic crawler and reduce the power loss of the machine, there is an elastic crawler with a groove for bending reduction on the inner peripheral side of the crawler body, and this groove is the width of the crawler body band of the lateral regulating projection It is provided so as to extend in the crawler body band width direction between the rail portions adjacent to each other on the outer side in the direction and in the crawler body circumferential direction (see Patent Document 1).
JP 2002-178964 A

In the conventional elastic crawler, there is a problem in that the rubber constituting the crawler body is cracked at the engagement portions on the inner peripheral side of the crawler body on the projecting end side of the lateral regulating protrusion.
As the cause of this rubber crack, the following causes are considered.
That is, the projecting end of the lateral regulating projection is the farthest portion in the cored bar portion embedded in the rubber from the center of bending at the portion where the elastic crawler is wound around the sprocket or the like. It is a large movement part, and the rubber stretch around the part is increased, resulting in rubber distortion.
And, since a groove for reducing bending is formed on the outer side of the lateral regulating projection located outside the crawler body belt width direction, out of the pair of lateral regulating projections engaged in the crawler body belt width direction, Combined with the fact that the rubber adhesion amount (rubber gauge) on the protruding end side of the outer lateral regulating projection is limited and the rubber adhesion amount on the protruding end side of the outer lateral regulating projection is small, the outer lateral regulating projection Rubber cracks are likely to occur around the protruding end side of.

  In view of the above problems, an object of the present invention is to provide an elastic crawler in which the occurrence of cracks on the inner peripheral side of the crawler main body due to the lateral restriction protrusions is reduced.

The technical means taken by the present invention in order to solve the technical problem includes a core metal provided at an interval in the circumferential direction on a crawler body formed in an endless belt shape by a rubber-like elastic material. The cored bar includes a cored bar body embedded in the crawler body, an anti-annulation protrusion that protrudes from the cored bar body toward the inner peripheral side of the crawler body, and is located on the center side in the crawler body band width direction, and the anti-developing projection. The crawler body band width direction outer side and one end side of the crawler body circumferential direction is formed to protrude from the core metal body in the crawler body circumferential direction, and includes a rail portion through which the wheel passes,
On each side of the crawler body in the circumferential direction of each cored bar, a lateral restriction projection that is located on the inner side in the crawler body band width direction from the rail portion is formed to project in the circumferential direction of the crawler body. The projecting end sides of the horizontal regulating protrusions of the core metal adjacent in the circumferential direction of the crawler body engage with each other in the crawler body band width direction, thereby regulating the lateral displacement of the core metal in the crawler body band width direction.
In the elastic crawler provided with a groove extending in the crawler main body band width direction on the inner peripheral side of the crawler main body and on the outer side in the crawler main body band width direction of the lateral restriction protrusion,
The lateral regulating projection having a regulating portion adjacent to the rail portion in the crawler body band width direction is configured to protrude in a direction opposite to the protruding direction of the rail portion from the adjacent metal core on the protruding side of the rail portion. It is characterized by being.

Further, between the core bars adjacent to each other in the crawler body circumferential direction, the lateral regulating projection provided on one core bar is directed from the position where the anti-derailing projection is provided in the crawler body belt width direction toward the other core bar and Projected in the same direction as the overhang direction of the rail part of one core,
The lateral regulating protrusion provided on the other core bar is directed from one of the other cored bar to the one core bar and between the lateral regulating projection of the one cored bar and the rail part. It is good to protrude so that it may enter between overhang sides.
In addition, in the case where the derailment prevention projection, the rail portion, and the lateral restriction projections in the circumferential direction of the crawler main body are provided on both sides of the core metal main body in the crawler main body width direction,
Between the core bars adjacent in the crawler body circumferential direction,
The lateral regulating protrusion provided on one side of the core metal body in the crawler body band width direction is the same as that of the other core metal from the position where the lateral regulating protrusion provided on one core metal is provided with the anti-roll-off projection in the crawler body band width direction. And a lateral regulating projection provided on the other core bar, and protruding in the same direction as the protruding direction of the rail portion of the one core metal, Projecting from between the gap toward the one core and between the lateral regulating projection of the one core and the projecting side of the rail part,
The lateral regulating protrusion provided on the other side of the core metal body in the crawler body band width direction is such that the lateral regulating projection provided on the one core metal from the position where the anti-roll-out preventing projection is provided in the crawler body band width direction. A lateral restriction protrusion that protrudes toward the metal core and is provided on the other metal core is provided between the other metal core and the rail portion toward the one metal core and the other metal core. You may protrude in the same direction as the overhang | projection direction of the rail part of a metal core.

  In the elastic crawler of this configuration, one of the core regulating members provided between the other side regulating projection provided on the other side in the width direction of the crawler body in the width direction of the other cored bar and the rail part is provided between the rails. It is preferable that the corner portion formed by the surface on the projecting end side and the surface on the inner peripheral side of the crawler main body of the lateral regulating projection projecting toward the corner be larger than the other lateral regulating projections.

  According to the present invention, it is possible to secure the amount of rubber adhering to the restricting portion, which is the protruding end side of the lateral regulating projection engaged in the crawler body band width direction, and to reduce the occurrence of cracks on the inner peripheral side of the crawler body due to the lateral regulating projection. be able to.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 4, reference numeral 1 denotes a crawler type traveling device that is employed as a traveling unit of a construction machine or an agricultural machine.
This crawler type traveling device 1 includes a sprocket 2 disposed on one side of the front and rear, an idler 3 disposed on the other side of the front and rear, and a plurality of wheels 4 disposed between the sprocket 2 and the idler 3. The track frame 5 is supported by the track frame 5 so as to be rotatable about a horizontal axis, and the sprocket 2 is rotated by the endless elastic crawler 6 around the sprocket 2, the idler 3 and the plurality of wheels 4. The sprocket 2 is rotated. By driving, the driving force is transmitted from the sprocket 2 to the elastic crawler 6 so that the elastic crawler 6 circulates and runs in the circumferential direction Y, thereby being able to run in the front-rear direction.

The elastic crawler 6 has a crawler body 7 formed in an endless belt shape by a rubber-like elastic material (rubber in the present embodiment) such as rubber, resin, and the crawler body 7 has its width direction X left and right. It is wound around the sprocket 2, the idler 3, and the roller 4 in accordance with the direction.
On the outer peripheral side of the crawler body 7, lugs 8 that come in contact with the ground are provided over the entire circumference at intervals in the circumferential direction Y.
As shown in FIGS. 1 and 2, the crawler main body 7 is provided with a core metal 9 disposed so as to be spaced in the circumferential direction Y and over the entire circumference in the circumferential direction Y.

In addition, on the outer peripheral side of the cored bar 9 in the crawler body 7, a tensile strength (not shown) is formed by arranging a number of tensile cords such as steel cords embedded in the circumferential direction Y in the left-right direction X. The body is provided.
Further, an engagement hole 10 into which teeth of the sprocket 2 are inserted to transmit power from the sprocket 2 to the elastic crawler 6 is adjacent in the circumferential direction Y of the crawler body 7 at the center in the left-right direction X of the crawler body 7. It is formed between each of the metal cores 9 to be performed.
The metal core 9 is formed of a hard material such as metal, and a metal core body 12 embedded in the crawler main body 7 and a pair of left and right protruding from the metal core body 12 to the inner peripheral side of the crawler main body 7. A pair of left and right wheels positioned on the outer side X in the left-right direction X (the side from the central portion of the crawler body 7 in the left-right direction X toward the end portion in the left-right direction X) The rail portions 14L and 14R and a pair of left and right lateral restricting projections 15A, 15B, 16A, and 16B provided in the front and rear in the crawler body circumferential direction Y of the core metal body 12 are provided.

The core metal main body 12 is composed of a central portion located on the center side in the left-right direction X of the crawler main body 7 and a wing portion integrally extending from the central portion to the left and right sides.
The left and right derailment prevention protrusions 13 protrude from the central portion of the core metal body 12 and are located on the center side in the left-right direction X of the crawler body 7 (from the center of the crawler body 7 in the left-right direction X to the left and right). The disengagement of the elastic crawler 6 (disengagement of the elastic crawler 6) is prevented by engaging the wheel 4, the idler 3 and the sprocket 2 with the anti-derailing projection 13.

The left and right rail portions 14L and 14R are arranged in a laterally distributed manner from the center of the crawler body 7 in the left-right direction X, and the core metal body 12 (the blades of the core metal body 12 is exposed so as to be exposed from the inner peripheral surface of the crawler body 7. Part).
The left and right rail portions 14L and 14R have one end side in the crawler body circumferential direction Y projecting from the core metal body 12 in the crawler body circumferential direction Y, and the other end side in the crawler body circumferential direction Y from the core metal body 12. It does not protrude in the crawler body circumferential direction Y.
In the embodiment shown in FIG. 1, one end side of the rail portion 14 </ b> R provided on the left and right one side X <b> 1 protrudes to the front and rear one side Y <b> 1 in the crawler body circumferential direction Y (hereinafter simply referred to as the circumferential one side Y <b> 1). The other end side of the rail portion 14R is located at the same position as the end portion in the crawler body circumferential direction Y of the core metal main body 12, and one end side of the rail portion 14L provided on the left and right other side X2 is in the crawler body circumferential direction Y. It protrudes to the other side Y2 in the front-rear direction (hereinafter simply referred to as the other side Y2 in the circumferential direction), and the other end side of the rail portion 14L is located at the same position as the end of the core metal body 12 in the crawler body circumferential direction Y.

Further, in the embodiment shown in FIG. 1, one end side in the crawler body circumferential direction Y on the top side of the left and right derailment prevention protrusions 13 is opposite to the protruding direction of the rail portions 14L and 14R on the same side in the left and right direction X. It is overhanging.
On the other hand, the wheel 4 is arranged straddling both left and right anti-derailing projections 13 and adopts an outer brim type rolling wheel 4 that travels outward in the left-right direction X of the left and right anti-derailing projections 13. The end surface of the rail portion 14 on the inner peripheral side of the crawler main body 7 is a rolling wheel rolling surface 19 on which the rolling wheel 4 travels (passes), and the rolling wheel rolling surface 19 is formed flat.

Further, a groove 20 for reducing bending resistance when the elastic crawler 6 is wound around the sprocket 2 or the idler 3 is provided on the inner peripheral surface of the crawler body 7.
The bend reducing grooves 20 are formed on both the left and right sides of the crawler body 7 and between the adjacent core bars 9 in the crawler body circumferential direction Y.
Further, each groove 20 is formed on the outer side in the left-right direction with respect to the inner ends of the rail parts 14L, 14R in the left-right direction X, and is formed to extend in the left-right direction X.
Each groove 20 is narrow between the rail portions 14L and 14R of the core metal 9 adjacent in the crawler body circumferential direction Y, and is wider on the outer side in the left-right direction X than the rail portions 14L and 14R. .

In the embodiment shown in FIGS. 1 to 3, the left and right lateral restricting projections 15 </ b> A and 15 </ b> B on one side Y <b> 1 in the circumferential direction of the cored bar 9 are distributed from the center in the horizontal direction X of the cored bar body 12 to the left and right. And projecting from the surface on one side Y1 in the circumferential direction of the metal core body 12 toward one side Y1 in the circumferential direction.
Further, the left and right lateral restricting protrusions 16A and 16B on the other circumferential side Y2 of the cored bar 9 are formed so as to be distributed from the center in the left-right direction X of the cored bar body 12 to the left and right. Is projected from the surface of the other circumferential side Y2 toward the other circumferential side Y2.

Further, the lateral restriction protrusions 15A, 15B, 16A, and 16B before and after the crawler body circumferential direction Y are provided so as to be disposed closer to the inner circumference side of the crawler body 7 from the center of the crawler body 7 in the thickness direction.
Further, the lateral restriction protrusions 15A, 15B, 16A, 16B before and after the crawler body circumferential direction Y are provided so as to be located on the inner side in the left-right direction X of the rail portion 14 on the same side in the left-right direction X.
The left and right lateral restriction projections 15A and 15B on the one circumferential side Y1 are formed to be narrower than the left and right separation between the left and right lateral restriction projections 16A and 16B on the other circumferential side Y2. Between the core bars 9 adjacent to each other in the circumferential direction Y of the main body, the left and right lateral restricting protrusions 16A and 16B on the other circumferential side Y2 are positioned on the outer side in the left and right direction X of the lateral restricting protrusions 15A and 15B on the circumferential one side Y1. Will be.

Further, between the core bars 9 adjacent in the crawler body circumferential direction Y, the left and right lateral regulating protrusions 15A and 15B on the one side Y1 in the circumferential direction and the left and right lateral regulating projections 16A and 16B on the other circumferential side Y2 are arranged. The projecting end side of the metal bar 9 overlaps when viewed from the left-right direction X (with respect to the front-rear direction), and the projecting end side of the lateral regulating projections 15A, 15B, 16A, 16B of the core 9 adjacent in the circumferential direction Y of the crawler body Engagement in the left and right direction X allows the movement of the core bars 9 adjacent to each other in the circumferential direction Y of the crawler main body 9 to be restricted in movement in the left and right direction X (preventing lateral displacement).
Therefore, the projecting end side of each lateral regulation protrusion 15A, 15B, 16A, 16B is a regulation part 21 that regulates the lateral displacement in the left-right direction X between the cored bars 9.

  In the metal core 9 having the above-described configuration, the restriction that is adjacent in the left-right direction X to the rail portion 14R on the left-right one side X1 out of the horizontal restriction protrusions 15A, 16A provided on the left-right one side X1 of the metal core body 12. A lateral restricting projection 16A having a portion 21 protrudes from the adjacent cored bar 9 on the projecting side of the rail portion 14R in a direction opposite to the projecting direction of the rail portion 14R (reverse direction). The restricting portion 21 of the lateral restricting protrusion 16A protruding in a direction opposite to the direction is between the restricting portion 21 of the transverse restricting protrusion 15A located on the X direction side in the left-right direction of the transverse restricting projection 16A and the rail portion 14R. It is configured to enter (become sandwiched).

In the present embodiment, between the core bars 9A and 9B adjacent in the crawler body circumferential direction Y, among the lateral regulation protrusions 15A and 16A provided on the left and right side X1 of the core bar body 12, The restriction part 21 of the lateral restriction protrusion 16A on the outer side in the left-right direction X is sandwiched between the restriction part 21 of the transverse restriction protrusion 15A on the inner side in the left-right direction X and the rail part 14R, thereby restricting the outer lateral restriction protrusion 16A. The amount of rubber adhering around the portion 21 is ensured, and cracking of the rubber constituting the crawler body 7 can be reduced.
Further, the core metal arrangement structure shown in FIG. 1 will be described in further detail between the metal cores 9A and 9B adjacent in the crawler body circumferential direction Y.
The lateral restricting projections 15A and 16A provided on the left and right one side X1 of the core metal body 12 are from the position where the lateral restricting projection 15A provided on the one core 9A is provided with the anti-roll-out preventing projection 13 in the left and right direction X. A lateral regulating protrusion 16A that protrudes toward the other metal core 9B and in the same direction as the protruding direction of the rail portion 14R of the one metal core 9A and that is provided on the other metal core 9B has the other metal core 9B. 9B protrudes from between the anti-derailing projection 13 of 9B and the rail portion 14R toward the one core metal 9A and between the lateral regulating projection 15A of the one core metal 9A and the protruding side of the rail portion 14R. Has been
The lateral regulation protrusions 15B and 16B provided on the left and right other side X2 of the core metal main body 12 have the lateral regulation projection 15B provided on the one core metal 9A provided with the anti-roll-off projection 13 in the lateral direction X. A lateral restriction projection 16B that protrudes from the position toward the other core metal 9B and that is provided on the other core metal 9B is between the derailment prevention projection 13 and the rail portion 14L of the other core metal 9B. It protrudes in the same direction as the protruding direction of the rail portion 14R of the other core metal 9B toward the one core metal 9A.

Here, as shown in FIG. 6A, between the core bars 9A and 9B adjacent in the crawler body circumferential direction Y, the lateral restriction projections 15B and 16A on the outer side in the left and right direction X are both laterally located on the inner side in the left and right direction X. Although it may be formed so as to be sandwiched between the restricting projections 15A, 16B and the rail portions 14L, 14R, in this case, one of the core bars 9A, 9B adjacent in the crawler circumferential direction Y is one core 9A. The horizontal deviation in the direction of arrow D can be prevented, but the lateral deviation in the direction of arrow E of the one core 9A cannot be prevented.
Therefore, as a preferred embodiment of the present invention, the structure shown in FIG. 1 is adopted. However, in the example shown in FIG. 1, the horizontal restricting projections 15B and 16B provided on the left and right other side X2 have a horizontal direction. The X lateral lateral restricting projection 16B projects in the same direction as the rail portion 14L, and the bending reducing groove 20 is located on the side of the restricting portion 21 of the lateral lateral restricting projection 16B. Rubber cracking due to the outer lateral restriction projection 16B provided on the other side X2 cannot be reduced.

Therefore, as shown in FIG. 4, the outer side regulating protrusion 16 </ b> B provided on the left and right other side X <b> 2 has a corner portion formed by a surface on the protruding end side and a surface on the inner peripheral side of the crawler body 7. By attaching a rounded radius R that is larger than the lateral regulating projections 15A, 15B, 16A, the amount of rubber adhering around the regulating portion 21 of the outer lateral regulating projection 16B provided on the left and right other side X2 is secured and the rubber In the cored bar portion embedded in the elastic crawler 6, the extension of the rubber on the protruding end side of the lateral regulating protrusion 16 </ b> B, which is the portion farthest from the bending center of the elastic crawler 6, is configured to be relaxed.
In addition, in order to prevent rubber cracking on the inner peripheral side of the crawler body 7 due to the lateral regulating projection, if the position where the lateral regulating projection is provided is brought closer to the outer circumferential side (grounding side) of the crawler body 7, this time, Since cracks occur on the surface on the grounding side, and the outer peripheral side of the crawler body 7 tends to expand due to the influence of trauma, the lateral restriction protrusions are brought closer to the outer peripheral side of the crawler main body 7 in terms of quality. I can't.

Further, as shown in FIG. 6 (b), on both the left and right one side X1 or the left and right other side X2, both the lateral restricting projections 15A and 16A (15B and 16B) inside and outside the left and right direction X are provided with the escape prevention projections 13. If it is made to project from the provided position, the amount of rubber adhering is limited at the projecting end side of the lateral regulating projection 13 on the inner side in the left-right direction X, and rubber cracking is likely to occur at this portion.
7 (a) and 7 (b) show another embodiment, and the one shown in FIG. 7 (a) is one lateral restricting protrusion on the one side Y1 in the circumferential direction of the metal core body 12 on one side X1 on the left and right. 15A is provided, and a pair of lateral restricting projections 15B and 15C are provided on the left and right other side X2, and a pair of lateral restricting projections 16A and 16C are provided on the left and right one side X1 on the other circumferential side Y2 of the core metal body 12. In addition, one lateral regulation protrusion 16B is provided on the left and right other side X2, and one lateral regulation protrusion 16B or 15A is inserted between the pair of lateral regulation protrusions 15B, 15C or 16A, 16C. Is.

In this embodiment, as in the embodiment shown in FIG. 6A, the lateral restriction protrusions 15B and 16A having the restriction parts 21 adjacent to the left and right rail parts 14L and 14R are provided on the left and right rail parts 14L and 14R. Are projected from the adjacent cored bar 9 in a direction opposite to the protruding direction of the rail portions 14L, 14R.
Therefore, in the embodiment shown in FIG. 7A, in other words, it can be said that the lateral regulating projection 15C and the lateral regulating projection 16C are added to the cored bar 9 of the embodiment shown in FIG. As described above, in the embodiment of FIG. 6A, the lateral displacement of the left and right other side X <b> 2 (arrow E direction) of one cored bar 9 </ b> A with respect to the adjacent cored bars 9 in the crawler circumferential direction Y cannot be prevented. On the other hand, in the embodiment shown in FIG. 7A, the lateral displacement of both the left and right one side X <b> 1 and the other side X <b> 2 can be regulated with respect to the core bars 9 adjacent in the crawler circumferential direction Y.

About another structure, it is comprised similarly to the said embodiment.
Further, in the case shown in FIG. 7B, the protruding end side of the lateral regulating protrusion 15A provided on the circumferential one side Y1 and the left and right one side X1, or the circumferential other side Y2 and the left and right other side. The projecting end side of the lateral regulating protrusion 16B provided on X2 is formed in a mountain shape that is convex in the projecting direction, and the lateral regulating projection 15B provided on the circumferential one side Y1 and the left and right other side X2 is projected. On the projecting end side of the lateral regulating projection 16A provided on the end side or the other circumferential side Y2 and the left and right side X1, a V-shaped concave portion 22 that is recessed toward the base side is formed. The protruding end sides of 15B and 16A are formed in a bifurcated shape, and a pair of right and left restricting portions 21 are provided for one lateral restricting protrusion 15B and 16A.

In this embodiment, the projecting end side of the lateral regulating projections 15A and 16B whose projecting end side is mountain-shaped is formed in the recess 22 on the projecting end side of the lateral regulating projections 15B and 16A whose projecting end side is bifurcated. It is comprised so that it may enter, and with respect to between the metal cores 9 adjacent to each other in the crawler circumferential direction Y, it is possible to regulate the lateral displacement of both the left and right one side X1 and the other side X2.
In this embodiment, the restricting portion 21 on the outer side in the left-right direction X of the lateral restricting projections 15B and 16A having a bifurcated projecting end side is formed between the rail portions 14L and 14R and the transverse restricting projections 16B and 15A. It is configured to enter.

  About another structure, it is comprised similarly to the said embodiment.

It is a block diagram which shows the arrangement | positioning structure of the core metal seen from the crawler main body inner peripheral side. It is an expanded block diagram of the arrangement | positioning structure of the metal core seen from the crawler main body inner peripheral side. It is sectional drawing which cut | disconnected the elastic crawler by the surface orthogonal to the circumferential direction. It is SS arrow sectional drawing of FIG. It is a side view of a crawler type traveling device. (A) is a block diagram which shows the arrangement | positioning structure of the core metal seen from the crawler main body inner peripheral side which concerns on other embodiment, (b) is sectional drawing of the elastic crawler which concerns on a disclosed example. It is a block diagram which shows the arrangement | positioning structure of the metal core seen from the crawler main body inner peripheral side which concerns on other embodiment.

Explanation of symbols

4 Roller 7 Crawler body 9 Core 9A One core 9B The other core 12 Core 12 main body 13 Derailment prevention projection 14L Rail portion 14R Rail portion 15A Lateral regulation projection 15B Lateral regulation projection 16A Lateral regulation projection 16B Lateral regulation projection 20 Groove 21 Restriction part R R Y Crawler body circumferential direction X Crawler body band width direction (left-right direction)
X1 Crawler body band width one side X2 Crawler body band width other side

Claims (4)

A crawler body (7) formed in an endless belt shape by a rubber-like elastic material is provided with a core metal (9) provided at intervals in the circumferential direction (Y). 7) A cored bar body (12) embedded in the core bar, and an anti-roll-out prevention projecting from the cored bar body (12) to the inner peripheral side of the crawler body (7) and located in the crawler body band width direction (X) center side The protrusion (13) is located on the outer side of the crawler body band width direction (X) of the derailment prevention protrusion (13), and one end side in the crawler body circumferential direction (Y) is from the core metal body (12) to the crawler body. Rail portions (14L, 14R) that are formed to project in the circumferential direction (Y) and through which the rolling wheels (4) pass,
Lateral restricting projections (15A, 15B, 16A, 16B) located on the inner side in the crawler body band width direction (X) from the rail portions (14L, 14R) on both sides in the crawler body circumferential direction (Y) of each cored bar (9) ) Projecting in the circumferential direction (Y) of the crawler body, and the projecting end side of this lateral regulating projection (15A, 15B, 16A, 16B) is a core bar (9) adjacent in the circumferential direction of the crawler body (Y) When the projecting end sides of the lateral regulating projections (15A, 15B, 16A, 16B) are engaged in the crawler body band width direction (X), the metal bar (9) is laterally displaced in the crawler body band width direction (X). It is a regulation part (21) that regulates
A groove (20) extending in the crawler main body band width direction (X) on the inner peripheral side of the crawler main body (7) and on the outer side of the crawler main body band width direction (X) of the lateral regulating protrusions (15A, 15B, 16A, 16B) In an elastic crawler provided with
A lateral regulating projection (16A) having a regulating portion (21) adjacent to the rail portion (14R) in the crawler body band width direction (X) is formed from the adjacent cored bar (9B) on the projecting side of the rail portion (14R). An elastic crawler configured to project in a direction opposite to a protruding direction of the rail portion (14R). Between the core bars (9A, 9B) adjacent to each other in the crawler body circumferential direction (Y), the lateral regulating protrusion (15A) provided on one core bar (9A) prevents the wheel from being removed in the crawler body band width direction (X). It protrudes from the position where the projection (13) is provided toward the other metal core (9B) and in the same direction as the protruding direction of the rail portion (14R) of the one metal core (9A),
The lateral regulation protrusion (16A) provided on the other core metal (9B) is connected to the one core metal (9A) from between the derailment prevention protrusion (13) of the other core metal (9B) and the rail portion (14R). 2) and projecting so as to enter between the lateral regulating protrusion (15A) of the one metal core (9A) and the projecting side of the rail portion (14R). Elastic crawler. The derailment prevention protrusion (13), the rail portion (14L, 14R), and the lateral restriction protrusions (15A, 15B, 16A, 16B) before and after the crawler body circumferential direction (Y) are the crawler body band width of the core metal body (12). Provided on both sides in the direction (X),
Between the core bars (9) adjacent in the crawler body circumferential direction (Y),
The lateral regulating projections (15A, 16A) provided on one side (X1) of the core metal body (12) in the crawler body band width direction are the lateral regulating projections (15A) provided on the one core metal (9A). From the position where the derailment prevention protrusion (13) is provided in the band width direction (X) toward the other core metal (9B) and in the same direction as the extending direction of the rail portion (14R) of the one core metal (9A) The lateral regulating projection (16A) provided on the other metal core (9B) is protruded between the rail portion (14R) and the anti-derailing projection (13) of the other metal core (9B). It projects toward one cored bar (9A) and between the lateral regulating projection (15A) of the one cored bar (9A) and the projecting side of the rail part (14R),
The lateral regulation protrusion (15B, 16B) provided on the other side (X2) in the crawler body band width direction of the core metal body (12) is the same as the lateral regulation projection (15B) provided on the one core metal (9A). A lateral regulating protrusion that protrudes from the position where the wheel removal preventing protrusion (13) is provided in the main body band width direction (X) toward the other core metal (9B) and is provided on the other core metal (9B). (16B) is directed from one of the other cored bar (9B) to the one cored bar (9A) and between the rail part (14L) and the other cored bar (9B). 2. The elastic crawler according to claim 1, wherein the elastic crawler projects in the same direction as a protruding direction of the rail portion (14 </ b> L). The elastic crawler according to claim 3.
Of the lateral restriction projections (15B, 16B) provided on the other side (X2) in the crawler body band width direction of the metal core body (12), the wheel removal prevention projection (13) of the other metal core (9B) and the rail portion ( 14L), and a corner portion formed by a surface on the projecting end side and a surface on the inner peripheral side of the crawler body (7) of the lateral regulating projection (16B) projecting toward the one core metal (9A) And an elastic crawler having a larger radius (R) than the other lateral regulating protrusions (15A, 15B, 16A).

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