JPH09226305A - Travelling body with lug and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To certainly carry out mud soil separation even in the case of continuously using a travelling body on the travelling body with a lug furnished with a mud soil separation means. SOLUTION: A mud soil separation means 10 is constituted by forming a part to contain gas not communicated to the outside to elastically deform a tread 7 by being compressed and to elastically return the tread 7 by being decompressed at least on the tread 7 between lugs 8 on a travelling body furnished with the mud soil separation means 10 to separate mud soil attached on it on the tread 7 having the travelling lugs 8 provided in a row with intervals in the circumferential direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to tires or crawlers for agricultural machines (tractors, combine harvesters, rice transplanters, transport vehicles, etc.) and light civil construction machines (trenchers, dozers, etc.) that run on wetlands, soft grounds, etc. The present invention relates to a traveling body with a lug used and a manufacturing method thereof.

[0002]

2. Description of the Related Art When traveling in wetlands, soft ground, etc. with a tractor equipped with a traveling body such as tires with lugs, there is a problem that mud adheres to the groove bottom between traveling lugs and impairs traction force.
In order to solve such a problem, JP-A-6-329000
As described in the publication, a traveling body with a lug that has traveling lugs arranged in a row in a tread with a circumferential interval and that rotates or circulates, and the tread between the traveling lugs is self-absorbing. It has been proposed to have an elastic restoring property for draining the absorbed water and to provide a mud peeling promoting device (mud peeling means) at a position lower than the height of the traveling lug.

That is, this peeling-accelerating device is made of sponge-like foamed rubber made of open cells, and absorbs water and the like contained in mud by self-water absorption when traveling on soft ground. Hold and compress when embracing the soft layer, the water retained by this compression is drained to form a water film at the interface with the soft layer, and this water film prevents mud adhesion or peels off the adhered soil, The elastic restoring force peels off the attached soil to prevent it from rotating around.

[0004]

However, since the running body with lugs described above employs sponge-like open-cell foamed rubber as a mud-separation promoting device, mud is also absorbed when absorbing muddy water or the like. It may get inside the bubbles, and as the water absorption and drainage actions are repeated, the mud will be accumulated in the bubbles. Therefore, when the mud accumulates in this way, the water absorption of the mud, elastic deformation and elastic restoration are not sufficiently performed. That is, in the initial use of the traveling body with lugs,
Although the sponge-like foamed rubber exerts a function as a mud-stripping device, its function gradually declines with continuous use, and finally the mud-sticking prevention and the sticking-soil peeling effect are low.

Therefore, in view of the above problems, it is an object of the present invention to provide a traveling body with a lug which can surely remove adhered soil even with continuous use. Another object of the present invention is to provide a method for manufacturing a traveling body with lugs, which can easily form such traveling body with lugs.

[0006]

The present invention has taken the following technical means in order to achieve the above object. That is,
In a traveling body with lugs, which comprises mud removing means 10 for removing adhered mud on a tread 7 having traveling lugs 8 arranged in a row at intervals in the circumferential direction, the mud removing means 10 is at least the lug. The tread 7 between 8 elastically deforms the tread 7 when compressed, and at the same time, forms a portion containing a gas that does not flow with the outside that elastically restores the tread 7 when the compression is released. According to this, according to this, when at least the lugs 8 are grounded on a soft ground, the contained gas is compressed and elastically deformed without leaking to the outside, and the traveling body 1 rotates or rotates. When you leave the grounded state by
Due to the strong elastic restoring force of the tread caused by the release of the compressed gas, the adhered mud can be positively separated. Moreover, since there is no intrusion of mud into the gas-containing part, it can be used continuously.

Further, the present invention is characterized in that the portion containing the gas is made of foamed rubber 11 having a large number of closed cells, whereby a large number of closed cells form a group as described above. Peeling is possible. Further, the present invention is characterized in that the foamed rubber 11 has a large wall thickness at a substantially center in the circumferential direction between the lugs 8 and is gradually thinned outward from the center in the circumferential direction. The foamed rubber 1 is provided at the substantially central portion in the circumferential direction between the lugs 8.
1 is made thicker to promote the separation of mud, and the foamed rubber 11 is made thinner as it approaches the circumferentially outer portion, that is, the lug 8 from the central portion, and thereby the foamed rubber is pulled by the lug 8. It is possible to prevent the peeling of 11 and the like.

The foamed rubber 11 is characterized in that it is provided only between the lugs 8. By doing so, the peeling of mud is promoted between the lugs 8 and the foamed rubber is peeled off in the lugs 8. It is possible to obtain sufficient traction force. In addition, the sipe 11 is spaced apart from the foamed rubber 11.
The foamed rubber 11 separated by the sipe 11a can obtain different movements, and the mud can be more reliably peeled off.

Further, according to the present invention, it is preferable that the foamed rubber 11 has a bubble diameter of 0.2 mm or more in order to remove mud. The present invention is characterized in that a release material 13 for containing the gas is embedded in the gas, and the release material 13 is embedded in the traveling body 1 in advance in this manner. By vulcanization and molding by means of vulcanization, the gas-containing portion, which is the means for removing mud, can be easily formed. As the release material 13, it is preferable to use stretchable organic fiber cloth such as nylon or polyester, and cotton cloth, silk cloth or the like can also be used.

In the manufacturing method of the present invention, the release material 13 is attached to at least the portion between the running lugs 8 on the outer periphery of the running body 1G in the raw state, and the green rubber strip is attached to the outer periphery of the release material 13. The sheet 7G is wound into the vulcanization mold 16 and is vulcanized to bond the running body 1G and the strip-shaped rubber sheet 7G, and at the portion where the release material 13 is adhered, gas is applied to the portion by interfacial peeling. It is characterized in that it is included, and it is possible to easily form the mud-stripping means (gas-containing portion).

Further, according to the manufacturing method of the present invention, the vulcanization mold 16 is provided with the foamed rubber 11G having closed cells attached to at least the portion formed between the running lugs 8 on the outer periphery of the running body main body 1G in the raw state. The rubber body 11G and the traveling body main body 1G are integrally vulcanized while blocking the rubber flow of the foamed rubber 11G between the traveling lugs 8 from the lug gap forming portion 17 of the molding die 16 to the lug forming portion 18. It is characterized by being molded, and by blocking the flow of the foamed rubber 11G, the thickness of the foamed rubber 11G between the lugs 8 can be secured, and the function of the foamed rubber as mud-stripping means can be sufficiently exerted. Moreover, it is possible to prevent the strength of the lug 8 from decreasing due to a large amount of the foamed rubber 11G flowing into the lug 8.

Then, the lug-to-lug forming portion 17 of the molding die.
In addition, by forming a weir 19 for the lug forming portion 18 to block the rubber flow, as the weir 19, fins are erected in the circumferential direction in the lug forming portion 17 of the molding die. It is preferable to form a concave notch in the portion 17.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3, a traveling body 1 exemplified by a pneumatic rubber tire with an agricultural lug is fitted to a rim of a wheel and includes a tube 3 inside, and the tube 3 can be filled with air via a valve 4. Is. However, it may be tubeless or a solid rubber tire.

The running body 1 is provided with a pair of annular bead portions 5 and a sidewall 6 and a tread 7 which are continuous in a toroidal shape between the bead portions 5, and a running lug 8 having a trapezoidal cross section is provided on the outer periphery of the tread 7. Are arranged alternately in a zigzag pattern in the left-right direction at intervals in the circumferential direction, and between the running lugs adjacent in the circumferential direction are recesses 9 that are curved in the radial direction.
A mud removing means 10 is provided on the tread 7 so as to cover the traveling lug 8 and the recess 9 over the entire circumference.

The mud-stripping means 10 is composed of a foamed rubber 11 having a large number of closed cells that prevent gas flow inside and outside and intrusion of water.
A plurality of sipes 11 a are formed in the portion (recessed portion 9) corresponding to the 0 running lugs 8 at intervals in the circumferential direction and over the width of the tread 7. Hereinafter, the manufacturing (vulcanization molding) state of the traveling body 1 with lugs will be described.

As shown in FIG. 4 (a), a belt-shaped foamed rubber 11G is wound around the outer periphery of the running body main body 1G formed in a tubular shape in advance to form a green tire G. Then, the mold 16 of the vulcanizer having the bladder 15 is loaded. This vulcanizing mold 16 is divided into two parts, an upper mold and a lower mold, and the upper mold and the lower mold are divided into two parts in the left-right direction.
It is designed to be divided into a plurality of parts such as a division, and on its inner surface, a portion (concave portion) 18 that forms a traveling lug and a portion (convex portion) 17 that forms a gap between the lugs are alternately arranged in the circumferential direction. ing.

The projection 17 of the molding die 16 has the projection 1
The plurality of fins 20 erected in the projecting direction of 7 project at intervals in the circumferential direction so as to extend over the tread width, and the height of the fins 20 corresponds to the carcass cord of the tire tread at the time of molding. The height is not reached. Then, the raw tire G around which the band-shaped foamed rubber 11G is wound is loaded into the molding die 16 and the raw tire G is pressed against the inner surface of the molding die 16 by expansion of the bladder 15 to perform vulcanization molding.

At this time, as shown in FIG. 5 (a), the foamed rubber 11G portion of the raw tire G first comes into contact with the convex portion 17 of the molding die 16, and the raw tire G is further depressed by the further expansion of the bladder 15. The running lug 8 is formed by flowing to the place 18 as indicated by the arrow a, but the fins 20 formed on the convex part 17 (in particular, the fins 20 at both ends in the circumferential direction) are
The foamed rubber 11G in contact with this becomes a weir 19 for preventing the foamed rubber 11G from flowing into the recess 18, and the foamed rubber 11G in this portion is recessed 18
Therefore, the foamed rubber 11 having a sufficient thickness is secured between the traveling lugs 8. At the same time, the fins 20 form a plurality of sipes 11a at intervals in the circumferential direction of the tire 1. In addition,
When the molding die is removed from the tire 1 after the vulcanization molding, in order to prevent the damage of the fin 20 and the chipping of the tire 1, the molding die 16 is divided and removed in the projecting direction (outer diameter direction) of the fin 20. To do so. At this time, in the lug 8, foam rubber 11
Since the layer does not become thick, the foamed rubber 11 is prevented from cracking or peeling when the mold is released.

FIG. 6 shows a state in which the lugged tire 1 molded in this way travels on a soft ground. That is, the foamed rubber 11 portion of the traveling body 1 that is in contact with the soft layer X1 on the cultivator X is compressed and elastically deformed without a large number of bubbles (gas) forming a group including leaking to the outside, and traveling. When separated from the soft layer X1 by the rotation of the body 1, the mud X2 adhering is positively peeled by the elastic restoring force of the foamed rubber 11 due to the release of the compression of gas. Therefore, the elastic recovery of the foamed rubber 11 is reliable and strong because it is the compressed gas that does not leak to the outside, and clogging of mud into air bubbles by absorbing muddy water as in the past is eliminated, Even if it is used continuously, the peeling function of this mud hardly deteriorates.

Further, between the lugs 8, the foam rubber 1
Since the plurality of sipes 11a are formed in one, the foamed rubbers 11 separated by the sipes 11a can move differently from each other, and further promote the separation of the mud X2. The sipes formed on the foamed rubber are not limited to those provided at intervals in the circumferential direction as described above, but also those provided at intervals in the axial direction of the tire, and provided in both the circumferential direction and the axial direction. It may be a thing (lattice shape).

The bubble diameter of the foamed rubber 11 used in the present invention is preferably 0.2 mm or more. this is,
This is because when the thickness is 0.2 mm or less, the elastic restoring force of the foamed rubber 11 becomes small and the effect decreases when the mud is peeled off through the compression of bubbles. Further, if the bubble diameter becomes too large, it may cause damage such as chipping of the foamed rubber 11 during traveling, so that the bubble diameter is preferably 5 mm or less.

FIGS. 7 and 8 show a second embodiment of the present invention in which the mud-stripping means 10 is foamed only between the traveling lugs 8 of the traveling body 1 having particularly a large amount of adhering mud (clogging of mud). The rubber 11 is provided. When the traveling body 1 according to the present embodiment is vulcanized and molded, as shown in FIG. 8A, only the portion corresponding to the space between the lugs 8 is provided on the outer periphery of the traveling body main body 1G in the raw state. A raw tire G is formed by sticking a foam rubber 11G similar to that shown in the embodiment, and the raw tire G is loaded into a molding die 16 for vulcanization molding. A pair of fins 20 are projected in the circumferential direction on the protrusions 17 corresponding to the lugs 8.
The distance between the pair of fins 20 is the same as or slightly wider than the distance between the lugs 8, that is, the circumferential width of the foamed rubber 11G attached to the green tire G.

Therefore, when the traveling body 1 is molded, the fins 20 block the flow of the foamed rubber 11G, and the foamed rubber 11G is less likely to flow into the portion where the lug 8 is formed. Sufficient wall thickness can be secured, and reliable mud removal similar to that of the first embodiment can be performed, and in the lug 8, there is no problem such as separation of foamed rubber from the lug 8 portion during traveling. Therefore, rug strength can be secured and sufficient traction force can be obtained.

In the present embodiment as well, a large number of fins may be formed between the pair of fins 20 as in the first embodiment. In the traveling body with lugs of the above-described first and second embodiments, the foamed rubber as the mud peeling means is integrally vulcanized and adhered. However, after the traveling body with lugs is molded, it may be separately adhered with an adhesive or the like. May be.

FIG. 9 shows a third embodiment of the present invention in which the mold 16 for vulcanization is modified, and the mold 16 has a corresponding convex portion between the lugs 8. A notch recess 21 is formed substantially in the center of the place 17, and the side wall portion of the recess in the circumferential direction serves as a weir 19, and the foamed rubber 11 of the green tire G is formed.
The G portion is held in the recess 21 so that the rubber flow to the lug 8 side can be prevented.

It should be noted that a plurality of fins may be formed in the notched recess 21 at intervals in the circumferential direction. FIG. 10 shows a fourth embodiment of the present invention, in which a gap along the circumferential direction is formed inside the tread 7 of the tire 1, and gas is included in this gap to remove the mud removing means 1.
0, and this gap is shown in FIG.
As shown in the sectional view of (b), the tread 7 is formed at two positions apart from each other in the width direction.

According to the present embodiment, as in the first to third embodiments, the gas contained in the gap of the tread 7 is compressed without leaking to the outside during traveling on soft ground, so that the tread 7 ( In particular, when the recess 9) is elastically deformed and when it separates from the ground, the tread 7 is elastically restored by the compressed gas, so that the mud adhered between the lugs 8 can be reliably separated.

The manufacturing (vulcanization molding) state of the running body 1 will be described. As shown in FIG. 10A, the outer circumference of the tread-corresponding portion of the running body 1G in the cylindrical raw state is described. , A stripping material 13 made of a stretchable organic fiber cloth such as nylon or polyester having a width narrower than half the width of the tread-corresponding portion is provided at intervals (corresponding to left and right lug forming positions). The stripping material 13 is wound around two places, and the strip-shaped rubber sheet 7G that constitutes the outer peripheral surface of the tread 7 is further wound from the outer periphery of the strip-shaped rubber sheet 7G. Then, the release material 1 is vulcanized.
3 Except for the pasted part, the traveling body 11G and the rubber sheet 7
G is vulcanized and adhered, and peeling from the traveling body 1G and the rubber sheet 7G is promoted at the portion where the peeling material 13 is adhered, and a gap is generated in this portion to contain gas. Therefore, such a gas can be easily included in the tread 7.

The rubber sheet may be a tread rubber forming a running body or a foamed rubber having closed cells as shown in the above embodiment. When foamed rubber is used, it is possible to further promote the peeling of the mud together with the bubbles contained therein.
Has an effect of preventing the rubber flow of the foamed rubber, and in particular, it is possible to secure a sufficient thickness of the foamed rubber between the lugs 8.

Then, the above-mentioned release material 13 can be attached so as to correspond only between the lugs 8. Further, as the release material 13, not only woven fabric but also knitted fabric can be used, and not limited to nylon and the like, cotton, silk fabric and the like can be used. 11 and 12 show a fifth embodiment of the present invention, which has a straight lug 8A and a wing lug 8B as a traveling lug 8 in a wheel in which an annular pipe is fixed to the outer ends of spokes. The traveling body 1 with a lug in which rubber is covered with a pipe is shown, and the mud is peeled from the foamed rubber 11 as in the first to third embodiments on the tread 7 between the straight lugs 8A and between the straight lugs 8A and the blade lugs 8B. Means 1
0 is provided, and its operation is similar to that of the above embodiment.

13 to 15 show a sixth embodiment of the present invention, showing a crawler as the traveling body 1 with lugs, and the tread 7 of the crawler 1 is located on the ground contact side of the elastic crawler belt 13. The mud-stripping means 10 made of foamed rubber 11 is provided between the protruding traveling lugs 8 as in the first to third embodiments, and the operation thereof is also the same as that in the above-described embodiment.

In the above fifth and sixth embodiments, the foamed rubber as the mud removing means may be integrally vulcanized and adhered, or may be separately adhered after molding the running body by an adhesive or the like. The present invention is not limited to the above-described embodiment, and the design can be changed. For example, the traveling lugs 8 may be arranged in any arrangement, such as a parallel lug arrangement, a V-shaped arrangement, or a C-shaped arrangement.

[0033]

As described above in detail, in the traveling body with lugs of the present invention, the mud-separating means forms at least the tread corresponding to the lugs with a portion containing a gas that does not flow to the outside. When at least the gap between the lugs is grounded on a soft ground, the contained gas is compressed and elastically deformed without leaking to the outside, and when the traveling body rotates or runs away from the grounded state. In order to obtain a strong elastic restoration of the tread due to the compression of this gas being released, it is possible to reliably peel off the mud adhered by this elastic restoring force,
Since mud or the like does not enter the gas-containing portion, the mud-peeling effect can be maintained even with continuous use (claim 1).

Further, in the present invention, since the portion containing the gas is made of foamed rubber having closed cells, it is possible to easily provide such a mud-stripping means containing a gas that does not flow to the outside ( Claim 2). Further, in the present invention, since the foamed rubber has a large wall thickness at a substantially central portion in the circumferential direction between the lugs and is gradually thinned outward from the central portion in the circumferential direction, a substantially central portion in the circumferential direction between the lugs is formed. In the portion, the foam rubber having a large thickness is used to promote the separation of the mud, and the thickness is made thinner toward the rug toward the outside, so that the foam rubber can be less damaged by the traction by the lug (claim 3). ).

Since the foamed rubber is provided only between the lugs, it promotes the peeling of mud between the rugs which are often clogged with mud or clogged, and the rug has a sufficient pulling force without any problems such as peeling of the foamed rubber. It is possible (Claim 4).
Further, since the sipe is formed in the foamed rubber at intervals, the foamed rubber separated by the sipe can obtain different movements from each other and further promote the separation of mud (claim 5). ).

Further, according to the present invention, since the bubble diameter of the foamed rubber is formed to be 0.2 mm or more, a strong elastic restoring force of the foamed rubber due to the compression of the bubbles can be obtained, and sufficient mud peeling can be achieved. It becomes possible to perform (Claim 6). Further, according to the present invention, since the release material for embedding the gas at the time of molding the running body is embedded in the inside of the gas, the release material is previously embedded in the running body at the time of vulcanization molding of the running body. By entering the gas, a gas layer as a mud removing means can be easily formed, and the mud can be separated by the gas layer (claim 7).

In the manufacturing method of the present invention, the release material is attached to at least the running lug gap forming portion on the outer periphery of the cylindrical running body main body in the raw state, and the strip-shaped rubber sheet in the raw state is wound around the outer periphery of the release material. In such a state, it is loaded into a vulcanization mold and vulcanized to adhere the running body and the belt-shaped rubber sheet, and at the part where the release material is adhered, gas is included in the part by interfacial peeling. (Gas-containing portion) can be formed (Claim 8).

Further, in the manufacturing method of the present invention, the vulcanization mold is loaded with foamed rubber having closed cells attached to at least the running lug-forming portion on the outer periphery of the cylindrical running body main body in a raw state, Since the foamed rubber and the traveling body main body are integrally vulcanized while blocking the rubber flow of the foamed rubber between the running lugs from the lug gap forming portion in the molding die to the lug forming portion, the flow of the foamed rubber is prevented. As a result, the thickness of the foamed rubber between the lugs can be secured, and the function of the foamed rubber as a means for removing mud can be sufficiently exerted. In addition, it is possible to prevent the strength of the rug from decreasing due to the large amount of foamed rubber flowing to the lug (claim 9).

Then, in the portion between the lugs of the molding die,
The rubber flow can be easily blocked by forming a weir for the lug forming portion (claim 10).

[Brief description of drawings]

FIG. 1 is a side view of a main part of a traveling body with a lug according to a first embodiment of the present invention.

FIG. 2 is a plan view of the traveling body with the lug.

FIG. 3 is a front sectional view of the traveling body with the lug.

FIG. 4 is a perspective view showing a running body in a raw state, showing a manufacturing state of the running body with the lug, and FIG. 4 (b) is a side sectional view showing a state during vulcanization.

FIG. 5 is an operation diagram showing a manufacturing state of the traveling body with lugs.

FIG. 6 is an operation diagram of the mud removing means of the traveling body with the lug.

FIG. 7 is a plan view of a traveling body with lugs according to a second embodiment of the present invention.

8A and 8B show a manufacturing state of the traveling body with lugs, FIG. 8A is a perspective view showing the traveling body in a raw state, and FIG. 8B is a side sectional view showing a state during vulcanization.

FIG. 9 is a side cross-sectional view showing a manufacturing state of the traveling body with lugs according to the third embodiment of the present invention.

FIG. 10 shows a manufacturing state of a traveling body with lugs according to a fourth embodiment of the present invention, (a) is a perspective view of the traveling body in a raw state, and (b) is a front sectional view after molding. .

FIG. 11 is a side view of a traveling body with lugs according to a fifth embodiment of the present invention.

FIG. 12 is a front sectional view of the traveling body with lugs.

FIG. 13 is a front sectional view of a traveling body with lugs according to a sixth embodiment of the present invention.

FIG. 14 is an overall side view of the traveling body with lugs.

FIG. 15 is a side sectional view of a main part of the traveling body with the lug.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Running body with lug 1G Running body main body in a raw state 7 Tread 7G Rubber sheet in a raw state 8 Running lug 10 Mud removing means 11 Foamed rubber 11G Foamed rubber 13 Organic fiber material 16 Molding die 17 Convex section 18 Recessed section 19 Weir

Claims (10)

[Claims] 1. A running body with a lug, comprising a tread (7) having running lugs (8) arranged in a row with a circumferential interval, and equipped with a mud-peeling means (10) for peeling the adhered mud. In the above, the mud peeling means (10) compresses at least the tread (7) between the lugs (8) to elastically deform the tread (7), and at the same time, the tread (7) is uncompressed. A traveling body with a lug formed by forming a portion containing a gas that does not flow with the outside that elastically restores. 2. The traveling body with lugs according to claim 1, wherein the portion containing the gas is made of foamed rubber (11) having a large number of closed cells. 3. The foamed rubber (11) is characterized in that the foamed rubber (11) has a large wall thickness at a substantially central portion in the circumferential direction between the lugs (8) and is gradually thinned outward from the central portion in the circumferential direction. The traveling body with a lug according to claim 2. 4. The traveling body with lugs according to claim 2, wherein the foamed rubber (11) is provided only between the lugs (8). 5. The traveling body with lugs according to claim 4, wherein sipes (11a) are formed in the foamed rubber (11) at intervals. 6. The bubble diameter of the foamed rubber (11) is 0.2.
The traveling body with a lug according to any one of claims 2 to 5, wherein the traveling body with a lug is formed to have a thickness of at least mm. 7. The traveling body with lugs according to claim 1, wherein a release material (13) for embedding the gas at the time of molding the traveling body is embedded in the inside of the gas. 8. The method for manufacturing a traveling body with lugs according to claim 1, wherein the release material (13) is provided at least on the outer peripheral portion of the outer periphery of the cylindrical traveling body main body (1G) in the green state. )
Is attached to the vulcanization mold (16) in a state where the strip-shaped rubber sheet (7G) in a raw state is wound around the outer periphery of the peeling material (13) and vulcanized, and thereby the running body (1G).
And a strip-shaped rubber sheet (7G) is adhered, and at the portion where the release material (13) is adhered, gas is included in the portion by interfacial peeling. 9. The method for manufacturing a traveling body with lugs according to claim 2, wherein closed cells are formed in at least a portion formed between the traveling lugs (8) on the outer periphery of the cylindrical traveling body main body (1G) in a raw state. The foamed rubber (11G) is attached to the vulcanization molding die (16) in a stuck state, and the foamed rubber (11G) between the running lugs (8) is formed between the lugs (17) in the molding die (16). ), The foamed rubber (11G) and the running body main body (1G) are integrally vulcanized while blocking the rubber flow from the lug forming portion (18) to the lug forming part (18). 10. A weir (19) for the lug forming portion (18) in the lug forming portion (17) of the mold (16).
The method for manufacturing a traveling body with lugs according to claim 9, wherein the rubber flow is blocked by forming a groove.