JP5485566B2 - Rubber crawler cored bar and rubber crawler using the cored bar - Google Patents

Description

  The present invention uses an endless belt-like crawler body made of an elastic member such as rubber and the like, and a core bar for a rubber crawler that extends in the width direction at a constant interval in the circumferential direction and the core bar. Related to rubber track.

  In recent years, rubber crawlers are widely used in traveling parts of work vehicles such as construction work machines, civil engineering work machines, and agricultural machines. This rubber crawler embeds a core metal at regular intervals in the circumferential direction of an endless belt-shaped crawler body made of an elastic member such as rubber so that it can be replaced with an iron shoe crawler. A pair of left and right guide protrusions having a top surface that protrudes toward the inner peripheral surface side of the crawler body and serves as a passing surface of the wheel is formed. The rubber crawler includes a driving wheel and an idler wheel formed by sprocket wheels provided on one end side and the other end side of the crawler frame provided in the work vehicle, and between the driving wheel and the idler wheel. It is wound around the provided wheel. In the rubber crawler in which the mandrel is embedded, the end portions of the guide protrusions are opened so as not to contact each other when the rubber crawler is wound around the drive wheel or the idler wheel.

  When the wheel is transferred over the top surface of the adjacent guide protrusion due to the gap between the guide protrusions of the adjacent metal cores, the wheel falls once between the top surfaces of the guide protrusions, and vibration is generated. In addition, when a rubber crawler rides on an obstacle such as a stone, when a so-called reverse bending phenomenon occurs, the top surface of the core bar that the adjacent core bars behave independently of each other and become the passing surface of the wheel There is a problem that the rubber crawler shifts, the core metal overlaps, so-called dislocation, or the entire rubber crawler shifts and derails.

  As a countermeasure for this, for example, Patent Document 1 discloses a rubber crawler core bar that prevents vibration due to falling of the wheel and suppresses the wheel, drive wheel, idle wheel and the like from being removed.

  The core bar of the rubber crawler disclosed in Patent Document 1 will be described with reference to FIGS. 11 and 12. FIG. 11 is a plan view of the main part of the cored bar 101, and FIG. 12 is a partially broken side view. Each cored bar 101 has a main body part 102 extending in the width direction and embedded in an endless belt-like crawler main body made of an elastic member such as rubber (not shown), and an inner peripheral surface of the crawler main body protruding from the main body 102. The top surfaces 103Aa and 103Ba of the guide projections 103A and 103B, which are a pair of guide projections 103A and 103B projecting to the side, are used as the passing surfaces of the rollers. The guide protrusions 103A and 103B are provided with a first protrusion engaging part 104A and a second protrusion engaging part 104B at the upper part of both end faces in the front-rear direction, which is the circumferential direction of the crawler body. The first protrusion engaging portion 104A has a protruding shape that protrudes forward and backward from the front and rear end surfaces of the guide protrusions 103A and 103B, and the second protrusion engaging portion 104B is open on the front and rear end surfaces of the guide protrusions 103A and 103B. The first protrusion engaging portion 104A of the cored bar 101 adjacent to the inside of the second protrusion engaging portion 104B is inserted and engaged.

  When the rubber crawler is traveling normally, the top surface 104Aa of the first protrusion engaging portion 104A protruding from the guide protrusions 103A and 103B is formed on the top surfaces 103Aa and 103Ba of the guide protrusions 103A and 103B, which are the passing surfaces of the wheels. When the wheels are transferred to the top surfaces 103Aa and 103Ba of the adjacent guide projections 103A and 103B, the wheels are prevented from falling, and the occurrence of vibration due to wheel dropping can be suppressed.

  Further, when riding on an obstacle such as a stone by traveling on a rough road or the like, force is applied to the rubber crawler in the vertical and horizontal directions, and if the crawler main body is elastically deformed and the core metal 101 is displaced, the adjacent core is displaced. The movement in the vertical direction is suppressed by the contact between the first protrusion engaging part 104A and the second protrusion engaging part 104B of the gold 101, and the movement in the width direction is suppressed between the first protrusion engaging part 104A and the second protrusion engaging part. The behavior of the guide projections 103A, 103B being displaced in the vertical and width directions by being restricted by the opposing side surfaces of 104B is suppressed to some extent, and the rubber crawler derailment is reduced.

JP-A-8-301155

  According to the cited document 1, when the cored bar 101 is displaced due to elastic deformation of the crawler body when riding on an obstacle such as a stone, the first protrusion engaging part 104A of each adjacent cored bar 101 and the first The displacement of the guide protrusions 103A and 103B is suppressed to some extent by the contact with the two protrusion engaging portions 104B.

  However, the protruding first protrusion engaging portions 104A formed on the guide protrusions 103A and 103B of the adjacent cored bar 101 from the concave second protrusion engaging portions 104B formed on the guide protrusions 103A and 103B are viewed from above. Since the rubber crawler rides on an obstacle such as a stone, the crawler main body is elastically deformed when the rubber crawler rides on an obstacle such as a stone and the second protrusion engaging portion 104B One protrusion engaging portion 104A is pulled out upward, and the adjacent core bars 101 are displaced or displaced from each other, and the top surfaces 103Aa, 103Ba of the guide protrusions 103A, 103B of the core bar 101 that becomes the passing surface of the wheel are shifted and removed. There are problems such as easy to do. Further, with the behavior of the cored bar 101, there is a concern that the crawler body in which the cored bar 101 is embedded is cracked or peeled off, resulting in a decrease in durability.

  An object of the present invention made in view of the above points is to provide a rubber crawler core bar and a rubber crawler using the core bar that can suppress the occurrence of vibration due to a drop due to a roller and can suppress the removal of the rubber crawler. It is in.

The invention of the metal core for a rubber crawler according to claim 1, which achieves the above object, is provided in an endless belt-like crawler body made of an elastic member at a constant interval in the circumferential direction of the crawler body, A pair of main body portions having a pair of wings projecting from the central portion to both sides, and a pair of top surfaces projecting from the main body portion to the inner peripheral surface side of the crawler main body on both sides of the central portion and forming a passing surface of a roller wheel A rubber crawler mandrel extending in the width direction of the crawler main body and embedded in the crawler main body, the front and rear of the guide protrusion being continuous with the top surface of the guide protrusion and shifted in the width direction from each other in a first bulging portion upper and second upper bulging portion projecting respectively, provided at the base end side of the guide protrusions from the first bulging portion and the upper second bulging portion upper, upper second Rise The guide protrusions at the same width direction position as the protruding part A lower first bulging portion projecting forward and a lower second bulging portion projecting rearward from the guide projection at a position in the width direction common to the upper first bulging portion; The upper first bulging portion and the lower second bulging portion, and the upper second bulging portion and the lower first bulging portion are arranged to overlap each other in the circumferential direction .

  According to this, adjacent core bars are overlapped with each other in the circumferential direction of the crawler body between the upper first bulging portion and the lower second bulging portion and the upper second bulging portion and the lower first bulging portion. The top surface of the guide projection, the top surface of the upper first bulging portion, and the top surface of the upper second bulging portion are continuous with each other and on the top surface. The core bar adjacent to the load from the rolling wheels that roll on the lower first bulge portion and the lower second bulge portion of the core metal adjacent to the upper first bulge portion and the upper second bulge portion. Thus, the swinging of the cored bar is suppressed, a stable passing surface of the wheel can be secured, and the occurrence of vibration due to the drop of the wheel can be suppressed.

  On the other hand, when a rubber crawler rides on an obstacle such as a stone by running on a rough road or a load in the width direction is applied, the crawler main body is greatly elastically deformed so that adjacent core bars are mutually in the width direction and the vertical direction. Although it is going to shift | deviate, it is the upper and lower with respect to an adjacent core metal by contact | abutting thru | or press-contact of the lower 2nd bulge part and lower 1st bulge part of the metal core which adjoins an upper 1st bulge part and an upper 2nd bulge part Relative behavior such as directional deviation and swinging is restricted, and the upper second bulging portion and the lower second bulging portion of the core metal adjacent to the upper first bulging portion and the lower first bulging portion are arranged. The relative behavior such as displacement in the width direction and swinging with respect to the adjacent cored bar is restricted by the contact or pressure contact, so that the elastic deformation of the crawler body can be suppressed and the rubber crawler can be prevented from being detached.

  Further, the lower second bulging portion and the lower first bulging portion of the core metal adjacent to the upper first bulging portion and the upper second bulging portion are in contact or pressure contact with each other, the upper first bulging portion and the lower first portion. The contact between the upper second bulging portion and the lower second bulging portion of the core metal adjacent to the bulging portion is performed outside the crawler main body protruding from the inner peripheral surface of the crawler main body. The durability of the rubber crawler is improved without causing peeling.

  According to a second aspect of the present invention, in the rubber crawler mandrel according to the first aspect, the upper first bulged portion and the upper second bulged portion gradually move from the guide projection side to the distal end side. It has the lower surface which inclined so that it may separate from a part.

  According to this, the resistance in contact between adjacent cores during the mounting of the rubber crawler, so-called winding, is reduced, and a smooth rubber crawler winding operation can be performed.

The invention of the rubber crawler according to claim 3 includes a cored bar that is embedded in an endless belt-like crawler body made of an elastic member so as to extend in the width direction at a constant interval in the circumferential direction of the crawler body. In the rubber crawler, the core metal protrudes from the main body portion to the inner peripheral surface side of the crawler main body on both sides of the central portion, and a main body portion having a central portion and a pair of wing portions protruding from the central portion on both sides. A pair of guide projections whose top surfaces form a passage surface of the wheel, and an upper first bulge portion and an upper portion that are continuous with the top surfaces of the guide projections and that are shifted in the width direction and project forward and backward, respectively. The guide protrusion at a position in the width direction common to the second bulge part, the upper first bulge part and the upper second bulge part on the proximal end side of the guide protrusion. A lower first bulging portion protruding forward from the upper portion, Includes a lower second bulging portion projecting rearwardly from said guide protrusion in the width direction positions shared with 1 bulging portion, and a neighboring first bulging portion upper core metal with each other and the lower second bulging portion The upper second bulging portion and the lower first bulging portion are arranged to overlap in the circumferential direction.

  This is a rubber crawler in which the metal core according to claim 1 is concretely embedded in the crawler body, and the top surface of the guide projection, the top surface of the upper first bulging portion, and the upper surface The top surface of the second bulge is continuous, and the load from the rolling wheels that roll on these top surfaces is dispersed to the adjacent cored bar, so that the swinging of the cored bar is suppressed, and the stable passing of the rolling wheel is achieved. The surface can be secured, and the occurrence of vibration caused by the rolling wheel can be suppressed.

  On the other hand, when the adjacent metal cores try to shift from each other due to elastic deformation of the crawler body, the lower first second bulge part of the metal core adjacent to the upper first bulge part and the upper second bulge part of the metal core And the lower first bulging portion abuts or presses against the adjacent core metal to restrict relative behavior such as vertical displacement and swing, and the upper first bulging portion and the lower first bulging portion. The relative behavior of the adjacent cored bar, such as displacement and swinging in the width direction, is regulated by the contact or pressure contact between the upper second bulged part and the lower second bulged part of the adjacent cored bar, and the elasticity of the crawler body. The deformation can be suppressed and the rubber crawler can be prevented from coming off.

  According to the present invention, the loads from the rolling wheels that roll on the top surface of the guide protrusion, the top surface of the upper first bulge, and the top surface of the upper second bulge are adjacent to each other. The core metal is dispersed to suppress the swinging of the core metal, and the occurrence of vibration due to the falling of the wheel can be suppressed.

  Further, when the crawler main body is elastically deformed and adjacent cored bars are displaced from each other, the upper first bulging part, the lower second bulging part, the upper second bulging part, and the lower part protruding from the cored bar The second bulge part is in contact with or pressed against the upper second bulge part, the lower second bulge part, the upper first bulge part, and the lower second bulge part of the adjacent core metal, and the behavior is regulated, The elastic deformation of the crawler body can be suppressed and the rubber crawler can be prevented from coming off.

It is a perspective view which shows a part of rubber crawler in this Embodiment. It is a perspective view of a core metal. FIG. 3 is a view as seen from an arrow A in FIG. 2. FIG. 3 is a view taken in the direction of arrow B in FIG. 2. It is a top view of the core metal in the state embedded in the rubber crawler body. It is the II sectional view taken on the line of FIG. It is the II-II sectional view taken on the line of FIG. It is the III-III sectional view taken on the line of FIG. It is the IV-IV sectional view taken on the line of FIG. FIG. 6 is a cross-sectional view taken along line VV in FIG. 5. It is a top view of the metal core of the conventional rubber crawler. FIG. 12 is a partially cutaway side view of FIG. 11.

  Hereinafter, an embodiment of a rubber crawler core bar and a rubber crawler using the core bar according to the present invention will be described with reference to FIGS. 1 to 10.

  FIG. 1 is a perspective view showing a part of the rubber crawler 1. The rubber crawler 1 has an endless crawler body 2 made of an elastic material such as rubber embedded with a cored bar 10 extending in the width direction at regular intervals in the circumferential direction. A circumferential tension member 5 formed of a steel cord or the like is embedded along the circumferential direction on the outer peripheral side, that is, on the grounding surface side from the cored bar 10, and the crawler body 2 has a cored bar substantially at the center in the width direction. Engagement holes for engaging the driving wheel and the idler wheel formed by the sprocket wheel between 10 are formed at intervals in the circumferential direction, and a lug is integrally formed on the ground contact surface side.

  The cored bar 10 embedded in the crawler body 2 will be described with reference to FIGS. 2 is a perspective view of the cored bar 10, FIG. 3 is a view as seen from the arrow A in FIG. 2, and FIG. 4 is a view as seen from the arrow B in FIG. Each core bar 10 is provided with a body portion 11 embedded in the crawler body 2 and extending in the width direction of the crawler body 2, and the body portion 11 has left and right wings whose width direction edges are parallel and gradually become thinner toward the tip. Parts 12 and 13 and a central part 14 connected between the wing parts 12 and 13 and engaged with the driving wheel and the idler wheel. In other words, it has a pair of wing parts 12 and 13 protruding left and right from the central part 14.

  A pair of first guide projections 20 and second guide projections 30 projecting from the both sides of the central portion 14 to the inner peripheral surface side of the crawler main body 2 are provided on the main body portion 11. The top surfaces 20a of the first guide protrusions 20 and the top surfaces 30a of the second guide protrusions 30 serving as passing surfaces of the rollers are formed to be smooth surfaces.

  A smooth top surface 21a, an inner side surface 21b on the inner side in the width direction, an outer side in the outer side in the width direction, from the upper front side in the circumferential direction of the rubber crawler 10 in the first guide protrusion 20 to the top surface 20a of the first guide protrusion 20 An upper first bulging portion 21 having a side surface 21c and a lower surface 21d and having a curved corner section extending forward and a front end portion 21e having a curved surface is formed to protrude. The lower surface 21d is inclined with a smoothly curved surface that is gradually separated from the main body 11 side as it moves from the first guide protrusion 20 side to the tip 21e side.

  The position is shifted from the front side of the first guide projection 20 by shifting the position from the upper first bulge portion 21 to the main body 11 side, that is, the base end side of the first guide projection 20 and outward in the width direction from the upper first bulge portion 21. A corner having a surface 22a, an inner surface 22b on the inner side in the width direction, an outer surface 22c on the outer side in the width direction, and a lower surface 22d extends forward with a curved cross-sectional rectangle, and the tip portion 22e has a curved lower first bulge. A portion 22 is formed to protrude.

  On the other hand, a smooth top surface 23a, an inner side surface 23b on the inner side in the width direction, an outer side in the width direction, from the rear upper part in the circumferential direction of the rubber crawler 10 on the first guide protrusion 20 to the top surface 20a of the first guide protrusion 20 The corner having the outer surface 23c and the lower surface 23d has a curved cross-sectional rectangle and is shifted rearward in the width direction from the upper first bulging portion 21 and extends rearward, and the tip 23e has a curved upper second shape. The bulging portion 23 is formed to protrude. The upper second bulging portion 23 has a common width direction position with the lower first bulging portion 22, the inner side surface 23 b is on the outer side in the width direction from the outer side surface 21 c of the upper first bulging portion 21, and the lower surface 23 d is As it moves from the first guide projection 20 side to the distal end portion 23e side, it inclines with a continuous smooth curved surface so as to gradually separate from the main body portion 11 side.

  In addition, the position of the first guide projection 20 is changed by shifting the position from the upper second bulging portion 23 toward the main body 11, that is, the base end side of the first guide projection 20 and inward in the width direction from the upper second bulging portion 23. A corner having a top surface 24a, an inner surface 24b on the inner side in the width direction, an outer surface 24c on the outer side in the width direction, and a lower surface 24d from the side extends with a curved cross-sectional rectangle, and the tip portion 24e has a curved lower portion. Two bulging portions 24 are formed to protrude. The lower second bulging portion 24 has a position in the width direction common to the upper first bulging portion 21, and the top surface 24 a is substantially the same height as the top surface 22 a of the lower second bulging portion 22 and is the outer surface. 24 c is set inward in the width direction from the inner side surface 22 b of the lower first bulging portion 22.

  A smooth top surface 31a continuous from the front upper portion of the second guide projection 30 in the circumferential direction of the crawler body 2 to the top surface 30a of the second guide projection 30, an inner side surface 31b on the inner side in the width direction, an outer side surface 31c on the outer side in the width direction, and A corner having the lower surface 31d has a curved rectangular cross section and extends forward, and an upper first bulge 31 having a curved tip end 31e is formed. The lower surface 31d is inclined with a continuous curved surface so as to gradually move away from the main body 11 side as it moves from the second guide projection 30 side to the tip 31e side.

  Further, the front side of the second guide projection 30 is shifted from the upper first bulge portion 31 to the main body 11 side, that is, the base end side of the second guide projection 30 and the outer side in the width direction from the upper first bulge portion 31. A corner having a top surface 32a, an inner surface 32b on the inner side in the width direction, an outer surface 32c on the outer side in the width direction, and a lower surface 32d extends forward with a curved cross-sectional rectangle, and the tip portion 32e has a curved lower first portion. The bulging portion 32 is formed to protrude.

  On the other hand, a smooth top surface 33a, an inner side surface 33b on the inner side in the width direction, and an outer side in the width direction are continuous from the rear upper part in the circumferential direction of the rubber crawler 10 in the second guide protrusion 30 to the top surface 30a of the second guide protrusion 30. The corners having the outer surface 33c and the lower surface 33d have a curved rectangular cross section and are shifted rearward in the width direction from the upper first bulging portion 31 and extend rearward, and the tip 33e has a curved upper second shape. The bulging portion 33 is formed to protrude. The upper second bulging portion 33 has a common width direction position with the lower first bulging portion 32, the inner side surface 33 b is on the outer side in the width direction from the outer side surface 31 c of the upper first bulging portion 31, and the lower surface 33 d is the first side. As it moves from the 2 guide projection 30 side to the tip 33e side, it gradually inclines with a smooth curved surface shape so as to gradually move away from the core metal body 11 side.

  Further, the rear side of the second guide projection 30 is shifted from the upper second bulge portion 33 to the main body 11 side, that is, the base end side of the second guide projection 30 and inward in the width direction from the upper second bulge portion 33. The corners having the top surface 34a, the inner surface 34b in the width direction, the outer surface 34c and the lower surface 34d in the width direction from the side extend rearward with a curved cross-section rectangle, and the tip end 34e has a curved lower portion. Two bulging portions 34 are formed to protrude. The lower second bulging portion 34 has the same position in the width direction as the upper first bulging portion 31, and the top surface 34 a is substantially the same height as the top surface 32 a of the lower first bulging portion 32 and is the outer surface. 34 c is set inward in the width direction from the inner surface 32 b of the lower first bulging portion 32.

  Each cored bar 10 formed in this way is shown in FIG. 5 a schematic plan view of the cored bar embedded in the rubber crawler body 2, and FIG. 6 is a cross-sectional view taken along line II of FIG. 5 and FIG. As shown in a sectional view taken along line II-II in FIG. 5 and a sectional view taken along line VV in FIG. 10, the main body portion 11 extends in the width direction and is embedded at equal intervals in the circumferential direction. The upper first bulging portion 21 protruding from the first guide protrusion 20 protruding from the surface is circumferential so that the outer side surface 21c faces the inner side surface 23b of the upper second bulging portion 23 of the adjacent core metal 10. And the lower first bulging portion 22 is an upper second portion projecting from the first guide protrusion 20 of the cored bar 10 at the tip corner portion 22f where the top surface 22a and the tip portion 22e are continuous. The lower surface 22d of the bulging portion 23 is close to or in contact with the inner surface 22b of the lower second bulging portion 24 Overlap in the circumferential direction so as to face the side surface 24c. In addition, the tip corner 24f where the top surface 24b and the tip 24e of the lower second bulge 24 are continuous comes close to or contacts the lower surface 21d of the upper first bulge 21 of the adjacent cored bar 10.

  Similarly, FIG. 8, FIG. 9, and FIG. 10 project from the inner peripheral surface of the crawler body 2 as shown in the sectional view taken along the line III-III, the sectional view taken along the line IV-IV, and the sectional view taken along the line VV in FIG. The upper first bulging portion 31 projecting from the second guide projection 30 is overlying in the circumferential direction so that the outer side surface 31 c faces the inner side surface 33 b of the upper second bulging portion 33 of the adjacent core metal 10. The lower first bulging portion 32 is an upper second bulging portion that projects from the second guide projection 30 of the adjacent core bar 10 at the tip corner portion 32f where the top surface 32a and the tip portion 32e are continuous. The inner surface 32b overlaps in the circumferential direction so as to be close to or in contact with the lower surface 33d of 33 and to face the outer surface 34c of the lower second bulging portion 34. Further, a tip corner portion 34f in which the top surface 34a and the tip portion 34e of the lower second bulge portion 34 are continuous comes close to or in contact with the lower surface 31d of the upper first bulge portion 31 of the adjacent core metal 10.

  When the work vehicle including the rubber crawler 1 configured as described above is traveling normally, the top surface 20a of each first guide protrusion 20 of the adjacent cored bar 10 serving as a passing surface of the wheel, the upper part The top surface 21a of the first bulge portion 21 and the top surface 23a of the upper second bulge portion 23 are continuous in the circumferential direction, and the top surface 30a of the second guide protrusion 30 and the top surface of the upper first bulge portion 31 31a and the top surface 33a of the upper second bulging portion 33 are continuous in the circumferential direction.

  On the other hand, the core metal 10 has an upper second bulge portion projecting from the first guide protrusion 20 of the core metal 10 adjacent to the tip corner portion 22f of the lower first bulge portion 22 projecting from the first guide protrusion 20. 23 is close to or in contact with the lower surface 23d of the lower 23, and the tip corner 24f of the lower second bulging portion 24 is close to the lower surface 21d of the upper first bulging portion 21 protruding from the first guide projection 20 of the adjacent cored bar 10. Or contact. Similarly, the tip corner portion 32f of the lower first bulge portion 32 projecting from the second guide projection 30 is formed on the lower surface 33d of the upper second bulge portion 33 projecting from the second guide projection 30 of the adjacent metal core 10. The tip corner portion 34f of the lower second bulging portion 34 approaches or contacts the lower surface 31d of the upper first bulging portion 31 protruding from the second guide protrusion 30 of the adjacent core metal 10.

  Thereby, the top surface 20a of the first guide protrusion 20, the top surface 21a of the upper first bulge portion 21, the top surface 23a of the upper second bulge portion 23, the top surface 30a of the second guide protrusion 30, and the upper first The upper first bulge portion 21 of the core metal 10 where the loads from the wheels of the work vehicle rolling on the top surface 31a of the bulge portion 31 and the top surface 33a of the upper second bulge portion 33 are in contact with each other. The core metal adjacent to the lower second bulge portion 24 of the adjacent core metal 10, the lower second bulge portion 22 of the core metal 10 adjacent to the upper second bulge portion 23, and the upper first bulge portion 31. 10 is dispersed in the adjacent cored bar 10 through the lower second bulged part 34 of the core 10 and the lower first bulged part 32 of the cored bar 10 adjacent to the upper second bulged part 33. Suppressed and stable passing surface of the wheel can be secured, the rolling wheel can be prevented from falling, and the occurrence of vibration caused by the rolling wheel can be suppressed. Kill.

  On the other hand, when the rubber crawler 1 rides on an obstacle such as a stone by traveling on a rough road or the like, various forces in the vertical, circumferential and lateral directions are applied to the crawler main body 2, and the crawler main body 2 is greatly elastic due to a so-called reverse bending phenomenon. The adjacent cored bar 10 tends to be displaced from each other due to deformation, but the tip corner 24f of the lower second bulging part 24 projecting from the first guide protrusion 20 of the adjacent cored bar 10 and the upper first bulged part. The lower surface 21 d of the protruding portion 21, the tip corner portion 22 f of the lower first bulging portion 22, the lower surface 23 d of the upper second bulging portion 23, and the lower second bulging portion 34 projecting from the second guide protrusion 30. Cores adjacent to each other by contact or pressure contact between the tip corner 34f and the lower surface 31d of the upper first bulge 31 and the tip corner 32f of the lower first bulge 32 and the lower surface 33d of the upper second bulge 33, etc. Phases such as up / down direction, width direction and swinging with respect to the gold 10 Derailing of the rubber crawler 10 can be prevented with behavior is restricted to suppress the elastic deformation of the crawler body 2.

  Various examples of main behavior of the cored bar 10 will be specifically described. For example, as shown by an arrow A1 in FIG. 2, when the tip end portion 21e of the upper first bulging portion 21 formed on the first guide protrusion 20 on the core metal 10 moves in the circumferential direction of the crawler main body 2. In accordance with this behavior, the tip corner 24f of the lower second bulging portion 24 contacts or presses the inclined lower surface 21d of the upper first bulging portion 21 of the adjacent core metal 10 in the circumferential direction, or the lower first A circumferential direction of the crawler body 2 with the adjacent cored bar 10 by contacting or pressing the inclined lower surface 23d of the upper second bulged part 23 of the upper cored bar 10 adjacent to the tip corner part 22f of the bulged part 22 Relative positions, that is, the circumferential direction in the crawler body 2 of the upper first bulging portion 21 and the lower first bulging portion 22 and the upper second bulging portion 23 and the lower second bulging portion 24 in the adjacent core metal 10. The overlap state at is maintained.

  Further, when a behavior occurs in which the tip portion 21e of the upper first bulging portion 21 formed on the first guide projection 20 on the metal core 10 moves upward as indicated by an arrow A2, the lower first The core metal 10 in which the tip corner portion 22f of the bulging portion 22 is in contact with or pressed against the lower surface 23d of the upper second bulging portion 23 of the adjacent core metal 10 and the lower surface 23d of the upper second bulging portion 23 is adjacent. The behavior with respect to the adjacent cored bar 10 in contact with or pressure contact with the tip corner portion 22f of the lower first bulging portion 22 is suppressed.

  When the tip 21e of the upper first bulging portion 21 formed on the first guide protrusion 20 moves downward in the mold 10 as indicated by an arrow A3, the upper first bulging is accompanied by the behavior. The lower end 21d of the part 21 is in contact with or pressed against the leading end corner 24f of the lower second bulging part 24 of the adjacent cored bar 10, and the leading end corner 24f of the lower second bulging part 24 is adjacent to the cored bar 10. The behavior with respect to the adjacent cored bar 10 in contact with or under pressure from the lower surface 21d of the upper first bulging portion 21 is suppressed.

  As shown by the arrow A4, when the behavior of the distal end portion 21e of the upper first bulging portion 21 formed on the first guide projection 20 on the metal core 10 moves inward in the width direction of the crawler body 2, the behavior is changed. Accordingly, the outer surface 21c of the upper first bulging portion 21 abuts or presses against the inner side surface 23b of the upper second bulging portion 23 of the adjacent core metal 10, and the behavior with respect to the adjacent core metal 10 is suppressed. .

  As indicated by an arrow A5, when the tip end portion 21e of the upper first bulging portion 21 formed on the first guide protrusion 20 on the metal core 10 moves outward in the width direction of the crawler main body 2, the behavior occurs. Accordingly, the inner side surface 21b of the lower first bulging portion 22 is in contact with or pressed against the outer side surface 24c of the lower second bulging portion 24 of the adjacent core metal 10, and the behavior with respect to the adjacent core metal 10 is suppressed. The

  2, when the tip 23e of the upper second bulging portion 23 formed on the first guide protrusion 20 moves in the circumferential direction of the crawler body 2 as indicated by an arrow B1 in FIG. In accordance with this behavior, the tip corner 24f of the lower second bulging portion 24 contacts or presses the inclined lower surface 21d of the upper first bulging portion 21 of the adjacent core metal 10 in the circumferential direction, or the lower first A circumferential direction of the crawler body 2 with the adjacent cored bar 10 by contacting or pressing the inclined lower surface 23d of the upper second bulged part 23 of the upper cored bar 10 adjacent to the tip corner part 22f of the bulged part 22 Of the crawler body 2 between the upper first bulging portion 21 and the lower first bulging portion 22 and the upper second bulging portion 23 and the lower second bulging portion 24 of the adjacent core metal 10. Maintain overlap in direction.

  Further, when the behavior of the tip portion 23e of the upper second bulging portion 23 formed on the first guide projection 20 on the metal core 10 moves upward as indicated by the arrow B2, the lower second The metal core 10 in which the tip end corner 24 f of the bulging portion 24 is in contact with or pressed against the lower surface 21 d of the upper first bulging portion 21 of the adjacent core metal 10 and the lower surface 21 d of the upper first bulging portion 21 is adjacent. The behavior with respect to the adjacent cored bar 10 in contact with or pressure contact with the tip corner portion 24f of the lower second bulging portion 24 is suppressed.

  As indicated by the arrow B3, when the behavior of the tip portion 23e of the upper second bulging portion 23 formed on the first guide projection 20 on the core bar 10 moves downward, the upper second bulging is accompanied with the behavior. The metal core 10 in which the lower surface 23d of the portion 23 is in contact with or pressed against the tip corner portion 22f of the lower first bulge portion 22 of the adjacent core metal 10 and the tip corner portion 22f of the lower first bulge portion 22 is adjacent. The behavior with respect to the adjacent cored bar 10 in contact with or under pressure from the lower surface 23d of the upper second bulging portion 23 is suppressed.

  When the behavior of the tip 23e of the upper second bulging portion 23 formed on the first guide projection 20 on the metal core 10 moves inward in the width direction of the crawler body 2 as indicated by an arrow B4, Along with this, the inner side surface 23b of the upper second bulge portion 23 abuts or presses against the outer side surface 21c of the upper first bulge portion 21 of the adjacent core metal 10, and this behavior with respect to the adjacent core metal 10 is suppressed. .

  As indicated by an arrow B5, when the tip end portion 21e of the upper first bulging portion 21 formed on the first guide protrusion 20 on the metal core 10 moves outward in the width direction of the crawler body 2, the behavior is generated. As a result, the outer surface 24c of the lower second bulging portion 24 comes into contact with or presses against the inner side surface 22b of the lower first bulging portion 22 of the adjacent core metal 10 to suppress the behavior.

  As shown by an arrow C1 in FIG. 2, when the tip 31e of the upper first bulging portion 31 formed on the second guide projection 30 on the core metal 10 moves in the circumferential direction of the crawler body 2, Along with the behavior, the tip corner portion 34f of the lower second bulging portion 34 contacts or presses the inclined lower surface 31d of the upper first bulging portion 31 of the adjacent core metal 10 in the circumferential direction, or the lower first bulging portion. Relative in the circumferential direction of the crawler body 2 with the adjacent cored bar 10 by contacting or press-contacting the inclined lower surface 33d of the upper second bulging part 33 of the upper cored bar 10 adjacent to the tip corner part 32f of the part 22 In the circumferential direction in the crawler body 2 of the upper first bulging portion 31 and the lower first bulging portion 32 and the upper second bulging portion 33 and the lower second bulging portion 34 in the adjacent core metal 10. Maintain the overlap state.

  Further, when a behavior occurs in which the tip portion 31e of the upper first bulging portion 31 formed on the second guide projection 30 is moved upward as indicated by an arrow C2, the lower first The metal core 10 in which the tip corner portion 32f of the bulging portion 32 is in contact with or pressed against the lower surface 33d of the upper second bulging portion 33 of the adjacent core metal 10 and the lower surface 33d of the upper second bulging portion 33 is adjacent. The behavior with respect to the adjacent cored bar 10 in contact with or pressure contact with the tip corner portion 32f of the lower first bulging portion 32 is suppressed.

  As indicated by the arrow C3, when the behavior of the tip portion 31e of the upper first bulging portion 31 formed on the second guide projection 30 on the core bar 10 moves downward occurs, the upper first bulging is accompanied with the behavior. The lower end 31d of the portion 31 is in contact with or pressed against the leading end corner portion 34f of the lower second bulging portion 34 of the adjacent core metal 10 and the leading end corner portion 34f of the lower second bulging portion 34 is adjacent. The behavior with respect to the cored bar 10 adjacent to and pressed against the lower surface 31d of the upper first bulging portion 31 is suppressed.

  As shown by the arrow C4, when the tip end portion 31e of the upper first bulging portion 31 formed on the second guide projection 30 is moved inward in the width direction of the crawler body 2 as indicated by an arrow C4, Accordingly, the outer surface 31c of the upper first bulging portion 31 is in contact with or pressed against the inner side surface 33b of the upper second bulging portion 33 of the adjacent core metal 10, and the behavior with respect to the adjacent core metal 10 is suppressed. .

  As indicated by the arrow C5, when the tip end portion 31e of the upper first bulging portion 31 formed on the second guide protrusion 20 on the core metal 10 moves outward in the width direction of the crawler body 2, the behavior is generated. Accordingly, the inner side surface 32b of the lower first bulging portion 32 is in contact with or pressed against the side surface 34c of the lower second bulging portion 34 of the adjacent core metal 10 with respect to the adjacent core metal 10 with respect to the adjacent core metal 10. This behavior is suppressed.

  As indicated by an arrow D1, when the tip 33e of the upper second bulging portion 33 formed on the second guide projection 30 on the core bar 10 moves in the circumferential direction of the crawler body 2, the behavior is accompanied by the behavior. Then, the tip end corner portion 34f of the lower second bulging portion 34 contacts or presses the inclined lower surface 31d of the upper first bulging portion 31 of the adjacent core metal 10 in the circumferential direction, or the lower first bulging portion 32 The relative position in the circumferential direction of the crawler body 2 with the adjacent cored bar 10 by contacting or press-contacting the inclined lower surface 33d of the upper second bulging part 33 of the upper cored bar 10 adjacent to the tip corner 32f in the circumferential direction, That is, the upper first bulging portion 31 and the lower first bulging portion 32 and the upper second bulging portion 33 and the lower second bulging portion 34 in the adjacent core metal 10 are overlapped in the circumferential direction in the crawler body 2. To maintain.

  Further, when the behavior of the tip portion 33e of the upper second bulging portion 33 formed on the second guide projection 30 on the core metal 10 as shown by the arrow D2 moves upward, the lower second The core metal 10 in which the tip corner portion 34f of the bulging portion 34 is in contact with or pressed against the lower surface 31d of the upper first bulging portion 31 of the adjacent core metal 10 and the lower surface 31d of the upper first bulging portion 31 is adjacent. The behavior with respect to the adjacent cored bar 10 in contact with or pressure contact with the tip corner portion 34f of the lower second bulging portion 34 is suppressed.

  When the tip 33e of the upper second bulging portion 33 formed on the second guide protrusion 30 is moved downward as indicated by the arrow D3, the upper second bulging occurs along with the behavior. The bottom bar 33d of the part 33 is in contact with or pressed against the tip corner part 32f of the lower first bulge part 32 of the adjacent core bar 10, and the tip corner part 32f of the lower first bulge part 32 is adjacent to the core bar 10. The behavior with respect to the adjacent cored bar 10 in contact with or under pressure from the lower surface 33d of the upper second bulging portion 33 is suppressed.

  When the behavior of the tip 33e of the upper second bulging portion 33 formed on the second guide projection 30 on the metal core 10 moves inward in the width direction of the crawler body 2 as indicated by an arrow D4, Accordingly, the inner side surface 33b of the upper second bulging portion 33 is in contact with or pressed against the outer side surface 31c of the upper first bulging portion 31 of the adjacent core metal 10, and the behavior with respect to the adjacent core metal 10 is suppressed. .

  As indicated by an arrow D5, when the tip end portion 31e of the upper first bulging portion 31 formed on the second guide protrusion 30 on the metal core 10 moves outward in the width direction of the crawler main body 2, the behavior occurs. As a result, the outer side surface 34c of the lower second bulging portion 34 abuts or presses against the inner side surface 34b of the lower first bulging portion 32 of the adjacent core metal 10, and this behavior with respect to the adjacent core metal 10 is suppressed. The

  Further, when each behavior of the core metal 10 occurs in a composite manner, the tip corner portion of the lower second bulging portion 24 protruding from the first guide projection 20 of the adjacent core metal 10 corresponding to the behavior. 24 f, the lower surface 21 d of the upper first bulging portion 21, the tip corner portion 22 f of the lower first bulging portion 22, the lower surface 23 d of the upper second bulging portion 23, and the lower second protruding from the second guide protrusion 30. 2 Contact between the tip corner portion 34f of the bulge portion 34 and the lower surface 31d of the upper first bulge portion 31, the tip corner portion 32f of the lower first bulge portion 32, the lower surface 33d of the upper second bulge portion 33, and the like. The relative behavior such as the vertical direction, the width direction, and the swinging of the adjacent cored bar 10 is regulated by the pressure contact, and the rubber crawler 1 can be prevented from being removed.

  Further, when the rubber crawler 1 travels around the outer periphery of the drive wheel and the idler wheel, the tip corner of the lower first bulging portion 22 that protrudes from the first guide projection 20 of the adjacent cored bar 10 is provided. 22f, the lower surface 23d of the upper second bulging portion 23, the tip corner 24f of the lower second bulging portion 24, the lower surface 21d of the upper first bulging portion 21, and the lower second protruding from the second guide protrusion 30. The tip corner portion 32f of the bulging portion 32 and the lower surface 33d of the upper second bulging portion 33, and the tip corner portion 34f of the lower second bulging portion 34 and the lower surface 31d of the upper first bulging portion 31 are in a non-contact state. Each cored bar 10 is smoothly curved without being constrained by the adjacent cored bar 10. The upper first bulging portion 21, the lower first bulging portion 22, the upper second bulging portion 23, the lower second bulging portion 24, and the second guide that protrude from the first guide protrusion 20 of the core metal 10. The contact or contact of the upper first bulging portion 31, the lower first bulging portion 32, the upper second bulging portion 33, and the lower second bulging portion 34 protruding from the protrusion 30 is the inner peripheral surface of the crawler body 2. Since it is performed outside the crawler body 2 that protrudes further, the durability of the rubber crawler 1 is improved without causing the crawler body 2 to crack or peel off.

  Further, as the lower surfaces 21d and 31d of the upper first bulging portions 21 and 31 and the lower surfaces 23d and 33d of the upper second bulging portions 23 and 33 move from the guide projections 20 and 30 side to the distal end side, gradually from the main body portion 11. Since it is inclined so as to be separated from each other, resistance in contact between the adjacent core bars 10 at the time of mounting of the rubber crawler 1, so-called winding is reduced, and a smooth winding operation of the rubber crawler 1 can be performed.

DESCRIPTION OF SYMBOLS 1 Rubber crawler 2 Crawler main body 10 Core metal 11 Main body part 12, 13 Wing | wing part 14 Center part 20 1st guide protrusion 20a Top surface 21 Upper 1st bulging part 22 Lower 1st bulging part 23 Upper 2nd bulging part 24 Lower second bulging portion 31 Upper first bulging portion 32 Lower first bulging portion 33 Upper second bulging portion 34 Lower second bulging portions 21a, 22a, 23a, 24a, 31a, 32a, 33a, 34a Surface 21b, 22b, 23b, 24b, 31b, 32b, 33b, 34b Inner side surface 21c, 22c, 23c, 24c, 31c, 32c, 33c, 34c Outer side surface 21d, 22d, 23d, 24d, 31d, 32d, 33d, 34d Bottom

Claims (3)

An endless belt-like crawler body made of an elastic member is provided at a constant interval in the circumferential direction of the crawler body,
A main body having a central portion and a pair of wings protruding from the central portion on both sides;
A pair of guide protrusions projecting from the main body part to the inner peripheral surface side of the crawler main body on both sides of the central part, and a top surface forming a passing surface of a wheel
In a core for a rubber crawler that extends in the width direction of the crawler body and is embedded,
An upper first bulging portion and an upper second bulging portion that are continuous with the top surface of the guide protrusion and that are shifted in the width direction and project forward and backward, respectively;
A lower side provided on the proximal end side of the guide projection from the upper first bulge portion and the upper second bulge portion, and projecting forward from the guide projection at a position in the width direction common to the upper second bulge portion A first bulging portion, and a lower second bulging portion that protrudes rearward from the guide protrusion at a position in the width direction common to the upper first bulging portion,
The adjacent core bars are arranged such that the upper first bulging portion, the lower second bulging portion, the upper second bulging portion, and the lower first bulging portion overlap each other in the circumferential direction. Rubber track corer.   The upper first bulging portion and the upper second bulging portion each have a lower surface that is inclined so as to be gradually separated from the main body portion as it moves from the guide projection side to the distal end side. Rubber track corer In a rubber crawler comprising a cored bar that is embedded in an endless belt-like crawler body made of an elastic member and extending in the width direction at a certain interval in the circumferential direction of the crawler body,
The core metal is
A main body having a central portion and a pair of wings protruding from the central portion on both sides;
A pair of guide protrusions projecting from the main body part to the inner peripheral surface side of the crawler main body on both sides of the central part and having a top surface forming a passing surface of a wheel;
An upper first bulging portion and an upper second bulging portion that are continuous with the top surface of the guide protrusion and that are shifted in the width direction and project forward and backward, respectively;
A lower side provided on the proximal end side of the guide projection from the upper first bulge portion and the upper second bulge portion, and projecting forward from the guide projection at a position in the width direction common to the upper second bulge portion A first bulging portion, and a lower second bulging portion that protrudes rearward from the guide protrusion at a position in the width direction common to the upper first bulging portion,
The adjacent metal cores are arranged such that an upper first bulging portion, a lower second bulging portion, an upper second bulging portion, and a lower first bulging portion are overlapped with each other in the circumferential direction. Rubber crawler.

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