JP6617601B2 - Strip pasting method and crimping jig - Google Patents

Description

  The present invention relates to a strip attaching method at a breaker edge and a crimping jig used in the method.

  Since tires (TB tires) for large vehicles such as trucks and buses require higher durability compared to ordinary vehicles, three to four breakers are stacked under the tread when forming TB tires. (For example, patent document 1).

  At this time, if there is a possibility that pressure is applied to the edge portions of the stacked breakers, the strips are attached to the edge portions of the breakers so that the edge portions of the breakers do not interfere with each other. This strip ensures strength by stacking strips of a certain thickness according to the durability of the tire.

  Specifically, when applying a strip to such a breaker, first cut the first piece of the strip and then cover it to cover the edge of the breaker. The second and subsequent strips are pasted and wound on a reel.

JP 2009-40332 A

  However, the second and subsequent strips are pasted on the first strip along the edge of the breaker in a separate step as described above. At this time, if the second and subsequent strips are wound on the reel without being sufficiently crimped, when the breaker is unwound from the reel during molding of the tire, the strip is peeled off from the breaker and sent to the molding machine. May cause trouble in tire production, such as clogging in the machine and machine failure.

  Accordingly, the present invention provides a strip bonding method and pressure bonding that can prevent the occurrence of troubles in tire production by preventing the strip from peeling off from the breaker when using the wound breaker when forming a TB tire. It is an object to provide a jig.

The invention described in claim 1
A strip attaching method at a breaker edge in which a second strip is attached to the edge portion while transporting a breaker for a TB tire whose edge portion is covered by a first strip,
A pressure-bonding step in which the second strip is pressed against the edge portion using a bonding plate while peeling the liner of the second strip; and
Using a crimping jig in which a shaft is inserted into the rear end portion of the presser body having a sharp tip and the tip portion is rotatably supported, the front end portion of the presser body is located downstream of the shaft. A re-compression step of contacting the second strip on the side and further crimping the second strip crimped in the crimping step to the edge portion by the weight of the pressing body. This is a method of applying a strip.

The invention described in claim 2
A crimping jig used in a re-bonding step of the strip attaching method according to claim 1,
A presser body that is formed in a sharp shape at the front end and an insertion hole is formed in the rear end,
A shaft inserted through the insertion hole of the pressing body,
The pressing member is rotatably supported by the shaft.

The invention according to claim 3
The crimping jig according to claim 2, wherein the pressing body has a substantially streamlined shape with a sharp tip and a round rear end.

The invention according to claim 4
The crimping jig according to claim 2 or 3, wherein the weight of the pressing body is 400 g to 800 g.

The invention described in claim 5
5. The crimping jig according to claim 2, wherein a material of the pressing body is iron, copper, or brass.

The invention described in claim 6
The said axis | shaft is arrange | positioned so that it may extend in the orthogonal | vertical direction with respect to the conveyance direction of the said breaker on the surface parallel to the conveyance surface of the said breaker. The crimping jig according to the item.

The invention described in claim 7
The crimping jig according to any one of claims 2 to 6, wherein the pressing body is movable along an axial direction of the shaft.

  According to the present invention, at the time of forming a TB tire, a strip sticking method and pressure bonding that can prevent the strip from peeling off from the breaker when using the wound breaker and prevent the occurrence of trouble in tire production. A jig can be provided.

It is a perspective view explaining the strip sticking method which concerns on one embodiment of this invention. It is a perspective view explaining the principal part of the strip sticking method which concerns on one embodiment of this invention. It is sectional drawing explaining the relationship between the breaker and strip in the edge part of a breaker. It is a perspective view explaining the conventional strip sticking method.

1. Background to the Present Invention Prior to describing the present invention based on the embodiment, the background to the present invention will be described.

  FIG. 3 is a cross-sectional view illustrating the relationship between the breaker and the strip at the edge portion of the breaker. FIG. 4 is a perspective view for explaining a conventional strip attaching method.

  In FIG. 3, the edge portion 2 of the breaker 1 is covered and covered with a first strip (first strip) 3, and a second strip (second strip) 4 is further stacked thereon. It has been. This covering is performed in a separate process in advance.

  In FIG. 4, the breaker 1 whose edge portion is covered with the first strip in advance is conveyed from the left side toward the right side, and the second strip 4 is transferred to the first strip at the edge portion of the breaker 1. It is stuck on. At this time, since the liner 5 is attached to the second strip 4, the second strip 4 is pressed against the edge portion of the breaker 1 using the attaching plate 6 while peeling the liner 5 upward. Crimped. When the third and subsequent strips are pasted together, the same process as that for the second strip is conducted.

  However, as described above, in the pasting of the second and subsequent strips, when the breaker to which the strip is stuck is wound around the reel without being sufficiently crimped, the breaker is unwound from the reel at the time of molding the tire. At this time, the strip may be peeled off from the breaker, and the breaker fed to the molding machine may be clogged in the machine, resulting in trouble in the tire production.

  Therefore, the present inventor conducted various experiments and examinations on what causes peeling of the strip from the breaker when forming a tire using the wound breaker. Obtained knowledge.

  That is, since the second strip 4 is applied with a certain force using the affixing plate 6 while the liner is peeled off, the second strip is pressed against the edge portion and crimped, so that the thickness of the strip or breaker varies, It has been found that due to local variations in physical properties, the pressure-bonding strength of the second strip 4 to the breaker may not be sufficiently increased, which causes the strip to peel off from the breaker.

  In order to cope with this, the pressing force to the second strip 4 by the sticking plate 6 may be increased. However, as the pressing force of the sticking plate 6 is increased, the liner 5 now has the first pressure. 2 is difficult to peel off from the second strip 4, and the conveying speed of the breaker 1 is slowed down, and the strip sticking time is increased.

  Therefore, it is conceivable to further provide the same affixing plate on the downstream side of the affixing plate 6, but in this case, the workability deteriorates and the strip is peeled off from the added affixing plate. May cause trouble.

  Therefore, the present inventor has further studied earnestly. As a result, when the second and subsequent strips are pasted after the first strip is crimped as shown in FIG. 1, in addition to the pasting plate, By using a specific crimping jig, it was confirmed that the loss of the bonding time and the influence on workability could be suppressed as much as possible while securing sufficient bonding strength, and the present invention was completed.

2. BEST MODE FOR CARRYING OUT THE INVENTION Strip bonding method and crimping jig according to an embodiment of the present invention Hereinafter, the present invention will be described based on the embodiment.

  FIG. 1 is a perspective view for explaining a strip attaching method according to the present embodiment. FIG. 2 is a perspective view for explaining a main part of the strip adhering method according to the present embodiment.

  1 and 2, as in FIG. 4, the breaker 1 is covered in advance with an edge portion by a first strip. As shown in FIG. 1, in the present embodiment, the second strips 4 are attached to both edge portions of the breaker 1, but in FIG. 2, the downstream side of the attaching plate 6 shown in FIG. Only one edge is shown.

  First, in the same manner as in the prior art, the first strip is previously attached to the breaker in a separate process, and the edge portion is covered (see FIG. 3).

  Next, as shown in FIG. 1, the second strip 4 is attached to the first strip at the edge portion of the breaker 1 using the attaching plate 6. The steps so far are the same as those of the conventional strip attaching method shown in FIG.

  However, in the present embodiment, as shown in FIG. 1, a crimping jig 7 is further arranged on the downstream side of the attaching plate 6. As shown in FIG. 1 and FIG. 2, the crimping jig 7 is inserted into the holding body 10 having a pointed tip and an insertion hole at the rear end, and the insertion hole of the pressing body 10. The holding body 10 is rotatably supported by the shaft 8. Then, using this crimping jig 7, the second strip 4 adhered by the affixing plate 6 is again crimped.

  Specifically, the tip of the pressing body 10 of the crimping jig 7 is brought into contact with the second strip 4 on the downstream side of the shaft 8, and the second strip that has been affixed and conveyed by the affixing plate 6. 4 is further crimped to the edge portion of the breaker 1 by its own weight.

  According to the strip affixing method using the crimping jig 7, the second strip 4 and the first strip affixed to the breaker 1 can be wound on the reel with increased crimping strength. When the breaker 1 is unwound from the reel during the molding of the tire, the strip is not peeled off from the breaker, and the trouble in the tire production that has occurred in the conventional strip attaching method can be prevented. In addition, since the crimping jig in the present embodiment has a simple structure, it does not cost, and the operation is simple and easy to handle.

  Further, in the crimping jig 7, only the shaft 8 is fixed, and the pressing body 10 is provided so as to be movable along the axial direction of the shaft 8. Since the width of the breaker can be accommodated, the pressure bonding strength of the strip can be improved without impairing the workability at the time of material replacement.

  In addition, it is preferable that the shape of the pressing body 10 is substantially streamlined with a sharp tip and a round rear end. By adopting such a substantially streamlined shape, the second strip 4 can be pressed against the edge portion with a stronger force even if the pressing body 10 has the same weight.

  Further, the pressing force applied to the second strip 4 by the weight of the pressing body 10 may be appropriately set in accordance with the characteristics of the second strip. Usually, the pressing body 10 has a weight of 400 g to 800 g. 10 is preferably used. When the weight of the pressing body 10 is 400 g to 800 g, the second strip 4 can be sufficiently pressed, and there is no possibility of slowing the flow of the breaker 1.

  Furthermore, the material of the pressing body 10 is preferably a metal, particularly iron, copper, or brass. Since the material of such a material has a sufficiently large mass per unit volume, the weight necessary for the presser body 10 can be sufficiently secured even if the presser body 10 is compactly formed.

  Furthermore, it is preferable that the shaft 8 is disposed on a plane parallel to the conveying surface of the breaker 1 in a direction perpendicular to the conveying direction of the breaker 1. By arranging the shaft 8 in this way, the pressing body 10 can be brought into linear contact with the second strip 4 in a state orthogonal to the width direction of the second strip 4, so that the second strip 4 can be easily and evenly arranged. It can be crimped to.

  Hereinafter, based on an Example, this invention is demonstrated more concretely.

Example 1
The first strip and the second strip were applied to a TB tire breaker of size 295 / 80R22.5, and the reel was wound up by 180 m. At this time, the second strip was carried out by the method of the present invention using the crimping jig of the present invention. A tire was molded using this reel, but the strip was not peeled off from the breaker, and the tire could be molded without any trouble.

(Comparative Example 1)
As Comparative Example 1, 25 m was wound on a reel in the same manner as in Example 1 except that the second strip was laminated according to the conventional strip bonding method. When a tire was molded using this reel, the strip peeled off from the breaker once.

  From the above, it has been confirmed that the strip peeling from the breaker can be prevented by employing the strip bonding method and the crimping jig of the present invention.

  While the present invention has been described based on the embodiments, the present invention is not limited to the above-described embodiments. Various modifications can be made to the above-described embodiment within the same and equivalent scope as the present invention.

DESCRIPTION OF SYMBOLS 1 Breaker 2 Edge part 3 1st strip 4 2nd strip 5 Liner 6 Adhering plate 7 Crimping jig 8 Shaft 10 Presser

Claims (7)

A strip attaching method at a breaker edge in which a second strip is attached to the edge portion while transporting a breaker for a TB tire whose edge portion is covered by a first strip,
A pressure-bonding step in which the second strip is pressed against the edge portion using a bonding plate while peeling the liner of the second strip; and
Using a crimping jig in which a shaft is inserted into the rear end portion of the presser body having a sharp tip and the tip portion is rotatably supported, the front end portion of the presser body is located downstream of the shaft. A re-compression step of contacting the second strip on the side and further crimping the second strip crimped in the crimping step to the edge portion by the weight of the pressing body. How to paste a strip. A crimping jig used in a re-bonding step of the strip attaching method according to claim 1,
A presser body that is formed in a sharp shape at the front end and an insertion hole is formed in the rear end,
A shaft inserted through the insertion hole of the pressing body,
The crimping jig, wherein the pressing body is rotatably supported by the shaft.   The crimping jig according to claim 2, wherein the pressing body has a substantially streamlined shape with a sharp tip and a round rear end.   The crimping jig according to claim 2 or 3, wherein a weight of the pressing body is 400 g to 800 g.   The crimping jig according to any one of claims 2 to 4, wherein a material of the pressing body is any one of iron, copper, and brass.   The said axis | shaft is arrange | positioned so that it may extend in the orthogonal | vertical direction with respect to the conveyance direction of the said breaker on the surface parallel to the conveyance surface of the said breaker. The crimping jig according to the item.   The crimping jig according to any one of claims 2 to 6, wherein the pressing body is movable along an axial direction of the shaft.

Images