JP6401476B2 - Shoe tip structure, shoe and loader - Google Patents

Description

  The present invention relates to a tip structure of a shoe, a shoe and a loader. Specifically, the present invention relates to a shoe tip structure, a shoe and a loader that can easily and flexibly cope with a difference in size of a tire before vulcanization and contribute to the manufacture of a high-quality tire.

  In the manufacture of tires, green tires molded in a shape close to a finished product in advance are supplied to a tire vulcanizer, and are pressurized and heated. A loader is used as a gripping and conveying device for carrying tires into the tire vulcanizer.

  In general, a loader includes a chuck portion composed of a shoe that grips a tire bead at its tip, a basket to which a plurality of shoes are attached, and a transport mechanism that supports the basket and can be driven vertically and horizontally. It has a structure.

  The tire gripped by the loader is conveyed between the upper and lower molds of the tire vulcanizer and is suspended toward the center post. The tire disposed on the center post is pressed against the mold through a bladder that expands from the inside due to the pressure of the heat medium, and the vulcanization reaction proceeds by the heat from the inner and outer surfaces of the tire, whereby vulcanization molding is performed.

  Further, after the tire is conveyed to the center post, the loader continuously holds the tire until the bladder is inflated to a certain size in order to maintain the position of the tire. A gripping claw at the tip of the shoe comes into contact with a tire bead enclosing a metal wire from the inner peripheral side of the tire to grip the tire.

  At this time, if a gripping claw having a size matching the size of the inner diameter of the tire is used, the tire can be gripped while maintaining the perfect circular shape. In addition to maintaining the shape of the tire and maintaining good uniformity of the tire after vulcanization molding, variations in quality can be suppressed.

  Under these circumstances, there is a loader that has attempted to cope with the deviation between the chuck portion of the loader and the center axis of the center post in order to keep the tire uniformity, for example, the loader described in Patent Document 1 Proposed.

  Here, Patent Document 1 describes a loader 100 as shown in FIG. The loader 100 includes a transport mechanism 101 and a chuck portion 103 that grips the green tire 102. Further, the tire is gripped by the gripping claw 104 at the tip of the chuck portion 103.

  Further, the loader 100 includes a support mechanism 107 that supports the chuck portion 103 so as to be displaceable in the horizontal direction with respect to a hanger 106 provided at the tip of the arm portion 105 of the transport mechanism 101. A guide rod 108 is disposed at the center of the chuck portion 103, and a fitting portion 109 at the tip thereof is fitted with the center post during tire conveyance.

  Further, the guide rod 108 is displaced by the support mechanism 107 in accordance with the displacement of the chuck portion 103 in the horizontal direction, and the displacement is absorbed when the displacement between the chuck portion 103 and the center axis of the center post occurs.

  As a result, the load on the chuck portion 103 and the transport mechanism 101 due to the displacement is reduced, the displacement of the green tire with respect to the mold is adjusted, and the uniformity of the tire after vulcanization is kept good.

JP 2007-331139 A

  However, in the loader described in Patent Document 1, the compatibility between the size of the inner diameter of the tire and the gripping claw at the tip of the shoe that grips the tire is achieved, although it copes with the problem of alignment with the center post during transportation. It has not been taken into account.

  As described above, from the viewpoint of maintaining the shape of the tire, it is preferable to match the size of the inner diameter of the tire and the size of the gripping claws. However, there is a current situation in which tires of a plurality of sizes are provided for a specific gripping claw when a general loader such as the loader described in Patent Document 1 is used.

  For example, a gripping claw that is optimally applied to a tire having an inner diameter of 17 inches is used not only for 17-inch tires but also for tires having inner diameter sizes in the vicinity of 16 inches and 18 inches. The use of gripping claws that are out of the appropriate size makes it difficult to maintain the perfect circular shape of the tire, which may cause a defect in the uniformity of the tire after vulcanization.

  More specifically, for example, when an 18-inch tire is provided for a 17-inch gripping claw, a polygonal holding shape having corners at positions where the tire abuts is provided. The trace of the retained shape at this time remains as a history in the tire before vulcanization, which causes the natural frequency when the molded tire is rotated. That is, the tire uniformity is affected and the tire quality is lowered.

  Also, when the size of the inner diameter of the tire to be molded changes greatly, the entire loader basket may be replaced, but the basket itself has a considerable weight, and the replacement work takes a lot of work. Moreover, the troublesomeness which uses conveyance apparatuses, such as a crane, also arises. Furthermore, securing a storage location for unused baskets is also a problem.

  Further, in order to change the size of the gripping claw, it is conceivable to replace each shoe, but it is inefficient to replace a plurality of shoes attached to the basket one by one using a tool. . Further, since the shoe mounting structure has a plurality of parts, there is a risk of parts being lost at the time of replacement.

  The present invention was devised in view of the above points, and can easily and flexibly cope with the difference in tire size before vulcanization, and contributes to the manufacture of high-quality tires. The purpose is to provide a loader.

  In order to achieve the above object, the tip structure of the shoe of the present invention includes a first detachable portion configured to be attachable to the shoe main body, a detachable configuration to the first detachable portion, and an end portion. And a second attaching / detaching portion formed with a gripping claw portion extending toward the opposite side to the side facing the bladder.

  Here, the tip end structure of the shoe is attached to and detached from the shoe body by the first attaching / detaching portion configured to be attachable to the shoe body side and the second attaching / detaching portion configured to be attachable to and detachable from the first attaching / detaching portion. Is possible.

  Further, the bead of the tire can be gripped by the gripping claw portion that extends toward the side opposite to the side where the shoe body faces the bladder along the end portion of the second attaching / detaching portion. That is, the tire can be gripped by the tip structure of the shoe.

  Further, the gripping claw portion is replaced by the first mounting portion that can be attached to the shoe main body side, and the second mounting portion that is configured to be detachable from the first mounting portion and formed with the gripping claw portion. Is possible. That is, it is possible to replace the gripping claw portion with a size suitable for the inner diameter size of the tire.

  Further, when the first attaching / detaching portion and the second attaching / detaching portion are located on the opposite side of the shoe body from the side facing the bladder, the bladder swells with respect to the first attaching / detaching portion and the second attaching / detaching portion. It becomes difficult to apply the pressure at the time, and the durability of the detachable structure can be improved. In addition, the attachment / detachment structure is located outside the shoe as viewed from the center post, which makes it easy to operate.

  The first attaching / detaching portion is urged vertically downward by an elastic body that can be inserted into a hole formed in the shoe main body and disposed on the outer peripheral surface, and the second attaching / detaching portion is connected to an end of the first attaching / detaching portion. When a lockable hole is formed, the first attaching / detaching portion and the second attaching / detaching portion can be brought into a fitting state by an elastic force. Moreover, the fitting state of the 1st attachment / detachment part and the 2nd attachment / detachment part can be cancelled | released by pulling up the 1st attachment / detachment part against elastic force. That is, it is possible to attach and detach the shoe body with the tip structure of the shoe by engaging and releasing the fitting state.

  In addition, the end of the first attachment / detachment portion opposite to the end that fits into the lock hole is formed in a substantially T shape, and along a groove provided around the hole formed in the shoe body. When configured to be rotatable and ascendable, the fitting state of the first attaching / detaching portion and the second attaching / detaching portion can be easily released. That is, by simply rotating the substantially T-shaped portion of the first attachment / detachment portion, the first attachment / detachment portion is pulled up along the groove provided around the hole, and the lock hole of the second attachment / detachment portion The fitting state with the end portion of the one detachable portion is released.

  In this case, for example, even when the first attaching / detaching portion and the second attaching / detaching portion are provided at a position higher than the human eye, the operation of rotating the substantially T-shaped portion of the first attaching / detaching portion. That is, the shoe tip structure can be detached from the shoe body only by the twisting operation.

  Further, the first attaching / detaching portion can be inserted into a hole formed in the shoe main body, and is urged toward the second attaching / detaching portion side in the horizontal direction by an elastic body arranged on the outer peripheral surface, and the second attaching / detaching portion is When the lock hole that can be fitted to the end of the first detachable portion is formed, the first detachable portion and the second detachable portion can be brought into a fitted state by elastic force. Further, by pulling out the first attaching / detaching portion against the elastic force, the fitting state of the first attaching / detaching portion and the second attaching / detaching portion can be released. That is, it is possible to attach and detach the shoe body with the tip structure of the shoe by engaging and releasing the fitting state. Further, the first attaching / detaching portion can be operated in the horizontal direction, and can be easily operated.

  In order to achieve the above object, the tip structure of the shoe of the present invention is formed on the shoe main body side with a first attachment / detachment portion configured to be attachable to the shoe tip end side, and the first attachment / detachment portion. A lock hole that can be fitted to the end of the part, and the first detachable part that is detachable, and the shoe body extends along the end toward the opposite side of the bladder. A second attaching / detaching portion on which a claw portion is formed.

  Here, the tip end structure of the shoe is attached to and detached from the shoe body by the first attaching / detaching portion configured to be attachable to the shoe tip end side and the second attaching / detaching portion configured to be attachable to and detachable from the first attaching / detaching portion. It becomes possible.

  In addition, since the first detachable portion is configured to be attachable to the tip end side of the shoe, maintenance of the first detachable portion is facilitated. That is, since the tip of the shoe is detachable from the shoe main body, when the shoe is not attached to the shoe main body, the first attaching / detaching portion can be inspected to increase the efficiency of maintenance work.

  Further, the gripping claw portion can be exchanged by the first mounting / dismounting portion configured to be attachable to the shoe tip portion side and the second mounting / detaching portion formed with the gripping claw portion. That is, it is possible to replace the gripping claw portion with a size suitable for the inner diameter size of the tire.

  In order to achieve the above object, a shoe of the present invention includes a shoe main body attached to a loader, a first attaching / detaching portion configured to be attachable to the shoe main body, and the first attaching / detaching portion. A shoe distal end structure configured to be detachable, and having a second detachable portion formed with a gripping claw portion formed so that the shoe main body extends toward the opposite side of the shoe body along the end portion. Prepare.

  Here, the gripping claw portion can be replaced by the first detachable portion configured to be attachable to the shoe main body side and the second detachable portion formed with the gripping claw portion. That is, it is possible to replace the gripping claw portion with a size suitable for the inner diameter size of the tire.

  In order to achieve the above object, the shoe of the present invention is attached to a loader and is configured to be attached to a shoe main body in which a lock hole is formed and a shoe tip end side, and an end portion of the shoe is connected to the lock hole A first detachable portion that can be fitted, and a gripping claw portion that is configured to be detachable from the first detachable portion and extends toward the opposite side of the shoe body from the side facing the bladder along the end portion. And a tip end structure of a shoe having a second attaching / detaching portion formed thereon.

  Here, the tip end structure of the shoe is attached to and detached from the shoe body by the first attaching / detaching portion configured to be attachable to the shoe tip end side and the second attaching / detaching portion configured to be attachable to and detachable from the first attaching / detaching portion. It becomes possible.

  In addition, since the first detachable portion is configured to be attachable to the tip end side of the shoe, maintenance of the first detachable portion is facilitated. That is, since the tip of the shoe is detachable from the shoe main body, when the shoe is not attached to the shoe main body, the first attaching / detaching portion can be inspected to increase the efficiency of maintenance work.

  In order to achieve the above object, the loader of the present invention is configured to be attachable to the loader body, a basket attached to the loader body, a shoe body attached to the basket, and the shoe body side. A first attaching / detaching portion and a gripping claw portion configured to be attachable / detachable with the first attaching / detaching portion and extending toward the opposite side of the shoe body from the side facing the bladder are formed along the end portion. And a tip structure of a shoe having a second attaching / detaching portion.

  Here, the gripping claw portion can be replaced by the first detachable portion configured to be attachable to the shoe main body side and the second detachable portion formed with the gripping claw portion. That is, it is possible to replace the gripping claw portion with a size suitable for the inner diameter size of the tire.

In order to achieve the above object, a loader according to the present invention includes a loader body, a basket attached to the loader body, a shoe body attached to the basket and formed with a lock hole, and a shoe tip end side. A first attachment / detachment portion whose end portion can be fitted into the lock hole, and a first attachment / detachment portion that can be attached / detached, and the shoe body faces the bladder along the end portion. A shoe tip structure having a second attaching / detaching portion on which a gripping claw portion extending toward the opposite side is formed.

  Here, the tip end structure of the shoe is attached to and detached from the shoe body by the first attaching / detaching portion configured to be attachable to the shoe tip end side and the second attaching / detaching portion configured to be attachable to and detachable from the first attaching / detaching portion. It becomes possible.

  In addition, since the first detachable portion is configured to be attachable to the tip end side of the shoe, maintenance of the first detachable portion is facilitated. That is, since the tip of the shoe is detachable from the shoe main body, when the shoe is not attached to the shoe main body, the first attaching / detaching portion can be inspected to increase the efficiency of maintenance work.

  The tip structure, shoe and loader of the shoe according to the present invention can easily and flexibly cope with the difference in size of the tire before vulcanization, and contribute to the manufacture of a high-quality tire.

It is the schematic (a) which shows the shoe main body which hold | gripped the tire before a bladder swells, and its front-end | tip structure, and the schematic diagram (b) which shows the condition at the time of a bladder swell. It is the schematic perspective view which showed the structure of the loader attachment / detachment mechanism partially. It is the schematic which shows the rotary attachment / detachment pin in 2nd Embodiment, and its periphery structure. It is the schematic which showed the motion regarding attachment / detachment by a rotary attachment / detachment pin. It is the schematic plan view which showed the structure of the hollow type basket. It is the schematic which showed the structure shown in FIG. 5 from the side surface. It is the schematic top view (a) of the attachment / detachment mechanism of 3rd Embodiment, sectional drawing from the side surface, and the front view (b) seen from the knob member side. It is the schematic which shows the structure of the conventional loader.

Hereinafter, a first embodiment of the present invention will be described with reference to the drawings for understanding of the present invention.
FIG. 1 is a schematic diagram (a) showing a shoe main body that grips a tire before the bladder is inflated and its tip structure, and a schematic diagram (b) showing a situation when the bladder is inflated. The following content is merely an example of a structure to which the present invention is applied, and the embodiment of the present invention is not limited to the structure shown below.

  Here, as shown in FIG. 1A, the loader 1 to which the present invention is applied includes a basket 2 and a shoe 3 attached to the basket 2.

  A plurality of shoes 3 for gripping the tire 4 are attached to the basket 2, but in FIG. 1 (a), only two shoes 3 facing each other are shown for convenience. Further, the basket 2 is connected to a transport mechanism (not shown) by a connecting portion 5 and is movable in the vertical and horizontal directions.

  Further, the tip portion of the shoe 3 is a gripping claw portion 8 that grips the bead of the tire 4 from the inner peripheral surface side. The gripping claw portion 8 is formed in a bowl shape protruding toward the outer peripheral direction of the basket 2. The shoe 3 is configured to be able to expand and contract in the inner diameter direction of the tire using an air cylinder as a drive source.

  A center post 6 for installing the tire 4 and performing vulcanization is located below the basket 2 and surrounded by the shoe 3. The center post 6 penetrates the space inside the tire 4 and the tire 4 is arranged. A bladder 7 is provided on the outer peripheral surface of the center axis of the center post 6 so as to be freely expanded and contracted by the pressure of the heat medium.

  The center post 6 is configured to be vertically movable by a power source such as a hydraulic cylinder, and the height position is changed in the vulcanizing process of the tire 4. Here, in the basket 2, the connecting portion 5 is arranged on the inner peripheral surface side, and when the center post 6 is raised, the basket 2 cannot pass through, so that the vertical length of the shoe 5 corresponds to the rise of the center post 6. The length is possible.

  Further, on the left side of FIG. 1A, a side view of the shoe 3 and a plan view seen from above are shown. As described above, the shoe 3 has the gripping claw portion 8 at the tip portion.

  The shoe tip region 9 and the shoe main body 11 are configured to be detachable by an attaching / detaching mechanism 12. The attaching / detaching mechanism 12 is disposed on the surface of the shoe main body 11 opposite to the surface facing the bladder 7.

  The attachment / detachment mechanism 12 has a pin hole 13 formed on the shoe body 11 side and an attachment / detachment pin 14. The detailed structure of the attachment / detachment mechanism 12 will be described later.

  Here, the attachment / detachment mechanism 12 does not necessarily have to be disposed on the surface of the shoe body 11 opposite to the surface facing the bladder 7, and the shoe does not affect the movement of the center post 6 or the vulcanization process. It can also be arranged on the side of the body 11 facing the bladder 7. However, the pressure of the swollen bladder 7 is less likely to be applied, the durability of the attaching / detaching mechanism 12 can be improved, and the operability of the attaching / detaching mechanism 12 is improved. It is preferable to arrange on the surface opposite to the surface facing the.

  FIG. 1A shows a state before the bladder 7 is inflated by the heat medium. However, the state in which the bladder 7 is inflated by being supplied with steam or the like and is in contact with the inner periphery of the tire 4 is shown in FIG. Shown in b). At this time, the tire 4 is gripped by the loader 1 by the gripping claw portion 8.

  Further, the center post 6 is lowered to a position for shaving. The arrow Z shown in FIG. 1B indicates the direction in which the center post 6 descends, and the arrow Y indicates the direction in which the bladder 7 swells. In this way, the loader 1 continues to grip the tire 4 with the gripping claw portion 8 until the bladder 4 can sufficiently grip the tire 4.

  FIG. 2 is a schematic perspective view partially showing the structure of the attaching / detaching mechanism 12 of the loader 1.

  2, the attaching / detaching mechanism 12 of the loader 1 has the attaching / detaching pin 14 and the pin hole 13 formed in the shoe main body 11 as described above. The detachable pin 14 includes a grip portion 15 and a lock pin 16 having a step formed on the outer peripheral surface. The grip portion 15 and the lock pin 16 are joined by a screw structure to form a detachable pin 14. The grip portion 15 is formed in a ring shape, and is a portion that is pulled when attaching and detaching.

  The peripheral diameter of the outer peripheral surface 19 on the lower side of the lock pin 16 is formed larger than the peripheral diameter of the pin hole 13. As a result, the outer peripheral surface 19 serves as a stopper, and even when the detachable pin 14 is pulled up from the state where the detachable pin 14 is disposed in the pin hole 13, the detachable pin 14 cannot be pulled upward. 2 indicates the insertion direction of the grip portion 15 into the pin hole 13, and the arrow Z2 indicates the insertion direction of the lock pin 16 into the pin hole 13.

  An urging spring 17 is attached to the outer peripheral surface of the lock pin 16 and is positioned by a flange 18 of the lock pin 16. In the state where the detachable pin 14 is disposed in the pin hole 13, the urging force of the urging spring 17 works, and the detachable pin 14 is pushed vertically downward. That is, when the grip portion 15 is not lifted upward, the detachable pin 14 is always urged vertically downward.

  A fitting portion 20 is formed at the lower end of the lock pin 16. The fitting portion 20 is fitted into a fitting hole 21 formed on the distal end region 9 side of the shoe, and becomes a portion that bears the locked state and the released state of the attachment / detachment mechanism 12.

  The attachment / detachment mechanism 12 has a shoe distal end portion 22 constituting the distal end region 9 of the shoe. The shoe distal end portion 22 has an insertion piece 23 in which a gripping claw portion 8 and a fitting hole 21 are formed. The insertion piece 23 is a portion that fits into the insertion groove 24 formed on the shoe main body 11 side. 2 indicates the direction in which the insertion piece 23 is inserted into the insertion groove 24.

  Here, the detachable pin 14 is not necessarily disposed on the shoe main body 11 side, and the fitting hole 21 is not necessarily formed in the shoe distal end portion 22. However, with regard to the attachment / detachment mechanism, the attachment / detachment pin 14 and the biasing spring 17 are present on the shoe body 11 side, and the shoe tip 22 only needs to form the fitting hole 21. That is, the detachable pin 14 is arranged on the shoe main body 11 side, and the fitting hole 21 is formed in the shoe front end portion 22 because the manufacture of the shoe front end portion 22 that requires mass production can be simplified as compared with the shoe main body. Preferably it is formed.

  On the other hand, a structure in which a fitting hole is formed on the shoe main body side and an attachment / detachment pin is disposed toward the shoe tip can be employed. In this case, even when a problem occurs in the detachable pin or the urging spring due to repeated use, it can be easily replaced. In particular, since the inspection can be performed when the shoe body is not attached to the shoe body, the efficiency of maintenance work can be increased.

  In the state where the shoe body 11 and the shoe tip 22 in the detachable mechanism 12 are connected, that is, in the locked state, the following structure is obtained.

  When the insertion piece 23 of the shoe distal end portion 22 is fitted into the insertion groove 24, the pin hole 13 and the fitting hole 21 are positioned on the same axis. Further, the detachable pin 14 is positioned through the pin hole 13 and the fitting hole 21. At this time, the fitting portion 20 is fitted to the fitting hole 21 at the lower end of the lock pin 16.

  As a result, the movement of the shoe distal end portion 22 in the direction of coming out of the insertion groove 24 is restricted, and the shoe is locked. Further, since the detachable pin 14 is urged vertically downward, that is, toward the fitting hole 21 by the urging spring 17, the locked state is maintained.

  When the shoe tip 22 is removed by the attaching / detaching mechanism 12, the grip portion 15 of the attaching / detaching pin 14 is put on a finger, and the attaching / detaching pin 14 is lifted vertically upward. The pulling force lifts the detachable pin 14 against the urging force of the urging spring 17, and the fitting portion 20 at the lower end of the lock pin 16 is separated from the fitting hole 21.

  The shoe tip 22 can be removed by pulling out the insertion piece 23 of the shoe tip 22 from the insertion groove 24 while maintaining the state where the detachable pin 14 is lifted upward.

  With the attachment / detachment mechanism 12 as described above, the shoe distal end portion 22 having the gripping claw portion 8 can be attached to and detached from the shoe main body 11. Further, along with this, it is possible to use the gripping claw portion 8 suitable for the size of the inner diameter of the tire 4 used in the vulcanization process.

  Further, the attachment / detachment of the shoe distal end portion 22 by the attachment / detachment mechanism 12 can be easily performed manually without accompanying the removal of parts by a tool or the like. That is, when changing the size of the tire to be used in the vulcanization process, it is possible to respond quickly and contribute to improving the production efficiency of the line.

Next, a second embodiment of the present invention will be described.
FIG. 3 is a schematic view showing a rotary detachable pin and its peripheral structure in the second embodiment. FIG. 4 is a schematic view showing movement related to attachment / detachment by the rotary attachment / detachment pin.

  The attachment / detachment mechanism 36 according to the second embodiment of the present invention includes the rotary attachment / detachment pin 25 having the structure shown in FIG. The rotary attachment / detachment pin 25 is a member corresponding to the attachment / detachment pin 14 of the first embodiment described above. The rotary attaching / detaching pin 25 is inserted through a pin hole formed on the shoe body side, but the description of the same part as the structure of the first embodiment is omitted.

  As shown in FIG. 3, the rotary attachment / detachment pin 25 includes a substantially cylindrical pin body 26 and an operation unit 27 extending in the horizontal direction from the vicinity of the upper end of the pin body 26. The operation unit 27 is configured to be rotatable integrally with the pin body 26 with the longitudinal direction of the pin body 26 as a central axis. Moreover, the fitting part 37 formed in the lower end of the pin main body 26 is fitted with the fitting hole 21 of the insertion piece 23 of the shoe tip part having the gripping claw part.

  An urging spring 34 is attached to the outer peripheral surface of the pin body 26 and is positioned by a flange 35 of the pin body 26. In a state where the rotary attaching / detaching pin 25 is disposed in the pin hole 29 of the shoe main body 28, the urging force of the urging spring 34 acts, and the rotating detachable pin 25 is pushed vertically downward.

  In addition, a guide groove 30 whose thickness increases along the rotation direction of the operation unit 27 is formed in the periphery of the pin hole 29 of the shoe body 28 where the operation unit 27 is located. The guide groove 30 is provided with a notch 33 at a position 32 where the operation portion 27 is lowest and a position 31 where the operation portion 27 is highest. When the operation unit 27 comes to the position of the notch 33, the rotational movement is restricted and the structure is formed.

  The movement of the rotary attachment / detachment pin 25 in the attachment / detachment mechanism 36 will be described with reference to FIG. The two drawings on the left side of FIG. 4 show a locked state in which the fitting portion 37 of the rotary attaching / detaching pin 25 and the fitting hole 21 at the tip of the shoe are fitted. Further, the two drawings on the right side of FIG. 4 show a released state in which the fitting portion 37 of the rotary detachable pin 25 is separated from the fitting hole 21 in the shoe tip portion.

  Since the rotary attaching / detaching pin 25 is normally pushed downward vertically by the urging force of the urging spring 34, the fitting portion 37 and the fitting hole 21 are fitted, and the withdrawal of the shoe tip is restricted. Here, when the operation unit 27 is rotated in the direction indicated by the arrow Y in the drawing, the operation unit 27 moves along the guide groove 30.

  By the above rotation operation, the height position of the operation portion 27 changes along the shape of the guide groove 30, and accordingly, the pin main body 26 also rises as shown on the right side of FIG. At this time, the fitting portion 37 moves away from the fitting hole 21. In other words, the locked state is released by the rotating operation of twisting the operation portion 27, and the shoe distal end portion can be pulled out from the shoe main body 28.

  The rotation operation stops when the operation unit 27 reaches the notch 33 at the position 31. This state is the position where the rotary attachment / detachment pin 25 is raised most. An arrow X shown in FIG. 4 indicates a direction in which the operation unit 27 can rotate.

  When the operation unit 27 is released, the rotary attaching / detaching pin 26 is pushed vertically downward by the urging force of the urging spring 34 and returns to the original height position. Further, the operation unit 27 also returns to the position 32. In addition, when attaching the shoe | hook tip part which has a holding claw part from which a magnitude | size differs, it can attach by operation which rotates the operation part 27 similarly.

  The attaching / detaching mechanism 36 according to the second embodiment of the present invention can release the locked state only by a simple operation of twisting the operation unit 27. Further, similarly to the first embodiment, it can be easily performed manually without detaching parts with a tool or the like.

Further, when the attaching / detaching mechanism 36 is disposed on a loader having a basket structure as shown in FIG.
FIG. 5 is a schematic plan view showing the structure of the hollow basket. 6 is a schematic view showing the structure shown in FIG. 5 from the side.

  Unlike the basket structure of the loader 1 described above, the loader 38 shown in FIG. 5 has a hollow-type basket 39 in which no member is disposed on the inner peripheral surface side. Moreover, the part shown with the dotted line in FIG. 5 represents the state which the shoe 40 shrunk | reduced to the inner peripheral side.

  Further, as apparent from FIG. 5, a plurality of shoes 40 are attached to the basket 39, and the shoes 40 can be expanded via the shaft portion 41 of the swing mechanism provided on each shoe 40. . In this regard, the basket 2 has a similar structure.

  In the hollow type structure of the basket 39, the space 42 is formed at the center thereof, so that the center post 6 can be passed through the space 42 at the center even when the center post 6 is lifted vertically upward. .

  That is, as is apparent from FIG. 6, the movement of the center post 6 can be accommodated without using a structure having a length in the vertical direction like the shoe 5 provided in the basket 2 described above. 40 is formed shorter than the shoe 5. This affects the height position where the attachment / detachment mechanism is provided.

  Specifically, in the structure of the basket 39, since the shoe 40 is short, the position at which the attachment / detachment mechanism for the shoe tip is also increased. Here, if the attachment / detachment mechanism 36 of the second embodiment is disposed in the basket 39, the rotary attachment / detachment pin 25 can be attached / detached by turning the operation portion 27 to rotate. That is, as the detachable pin 14 of the detachable mechanism 12 can be attached / detached without being pulled upward, the operability is improved.

  Of course, it is also possible to use the attachment / detachment mechanism 12, but for example, when the attachment / detachment mechanism is disposed at a position higher than the operator's eye level, the attachment / detachment mechanism 36 is Easy operation for attachment and detachment. That is, as long as it is within the reach of the hand, the tip of the shoe can be easily replaced only by twisting and rotating the operation unit 27.

Subsequently, a third embodiment of the present invention will be described.
FIG. 7: is the schematic top view (a) of the attachment / detachment mechanism of 3rd Embodiment, sectional drawing from the side, and the front view (b) seen from the knob member side.

  The attachment / detachment mechanism 43 according to the third embodiment of the present invention includes a knob-type attachment / detachment pin 44 having a structure shown in FIG. The knob-type detachable pin 44 is a member corresponding to the detachable pin 14 of the first embodiment described above. The knob-type detachable pin 44 is inserted through a pin hole formed on the shoe main body side, but the description of the same part as the structure of the first embodiment is omitted.

  As shown in FIG. 7A, the knob-type detachable pin 44 is disposed in the horizontal direction with respect to the pin holding member 45 provided on the shoe body. Moreover, as shown in the figure on the left side of FIG. 7B, two knob-type attaching / detaching pins 44 are arranged vertically. The pin holding member 45 is provided with a pin hole 46.

  A head portion 48 is provided at an end portion of the knob-type attaching / detaching pin 44 opposite to the shoe distal end portion 47, and a knob-type attaching / detaching portion between the head portion 48 and the pin holding member 45 is provided. A knob member 49 that holds the outer peripheral surface of the pin 44 is attached.

  An urging spring 50 is attached to the outer peripheral surface of the region inserted into the pin hole 46 of the knob-type detachable pin 44. The urging spring 50 is built in the pin hole 46 and urges the knob-type detachable pin 44 toward the tip 47 of the shoe.

  Further, as shown in the right side view of FIG. 7B, two knob members 49 are provided on the left and right, but one corresponds to one knob-type attaching / detaching pin 44. Further, as shown by a dotted line in FIG. 7A, when the knob member 49 is gripped inward, the tip of the knob member 49 is moved in a direction in which the head 48 of the knob-type detachable pin 44 is pulled out.

  During this movement, the knob-type detachable pin 44 moves against the urging force of the urging spring 50. Further, with this movement, the fitting portion 51 located on the opposite side of the head 48 of the knob-type detachable pin 44 is retracted into the pin hole 46 of the pin holding member 45. Further, when the knob member 49 is released, the knob type attaching / detaching pin 44 returns to the distal end portion 47 side of the shoe by the biasing force of the biasing spring 50.

  The fitting portion 51 is normally fitted into the fitting hole 52 provided in the shoe distal end portion 47 by the urging force of the urging spring 50 to lock the shoe distal end portion 47. However, the state in which the fitting portion 51 and the fitting hole 52 are fitted is released by gripping the knob member 49 inward.

  The shoe tip portion 47 has a structure in which the convex portion 53 is inserted along the groove portion 54 of the pin holding member. By releasing the locking state of the fitting portion 51, the shoe tip portion 47 is made vertical. It can be removed downward. That is, the attachment / detachment mechanism 43 can attach / detach the shoe distal end portion 47 by operating the knob member 49.

  Further, the shoe tip portion 47 has a structure having a gripping claw portion, which is the same as the structure shown in the previous embodiments.

  As described above, in the third embodiment of the present invention, it is possible to easily remove the distal end portion 47 of the shoe only by operating the knob member 49. Moreover, since the operation | movement which grasps the knob member 49 is very easy, it becomes easy to use irrespective of the height position where the attachment / detachment mechanism 43 is arrange | positioned.

As described above, the tip structure of the shoe of the present invention can easily and flexibly cope with the difference in size of the tire before vulcanization, and contributes to the manufacture of a high-quality tire.
Further, the shoe of the present invention can easily and flexibly cope with the difference in size of the tire before vulcanization, and contributes to the production of a high-quality tire.
In addition, the loader of the present invention can easily and flexibly cope with the difference in size of the tire before vulcanization, and contributes to the manufacture of a high-quality tire.

DESCRIPTION OF SYMBOLS 1 Loader 2 Basket 3 Shoe 4 Tire 5 Connecting part 6 Center post 7 Bladder 8 Grasping claw part 9 Shoe tip region 11 Shoe body 12 Detachment mechanism 13 Pin hole 14 Removable pin 15 Grip part 16 Lock pin 17 Biasing spring 18 Flange 19 Outer peripheral surface 20 Fitting portion 21 Fitting hole 22 Shoe tip portion 23 Insertion piece 24 Insertion groove 25 Rotary detachable pin 26 Pin main body 27 Operation portion 28 Shoe main body 29 Pin hole 30 Guide groove 31 Position 32 Position 33 Notch 34 Energizing Spring 35 Flange 36 Attaching / detaching mechanism 37 Fitting part 38 Loader 39 Basket 40 Shoe 41 Shaft mechanism shaft part 42 Space 43 Attaching mechanism 44 Knob-type attaching / detaching pin 45 Pin holding member 46 Pin hole 47 Shoe tip part 48 Head part 49 Knob member 50 Biasing spring 51 Fitting part 52 Fitting hole 3 the convex portion 54 groove

Claims (3)

A first attachment / detachment portion configured to be attachable to the shoe body side;
A second attachment / detachment portion configured to be attachable / detachable to / from the first attachment / detachment portion and formed with a gripping claw portion extending toward an opposite side to the side of the shoe body facing the bladder along the end portion; Bei example,
The first attaching / detaching portion is urged vertically downward by an elastic body that can be inserted into a hole formed in the shoe main body and disposed on an outer peripheral surface,
The second detachable part is formed with a lock hole that can be fitted to an end of the first detachable part,
The end of the first attachment / detachment portion opposite to the end that fits into the lock hole is formed in a substantially T shape, and along a groove provided around the hole formed in the shoe body. And can be rotated and raised,
A tip structure of a shoe in which an end of the first attaching / detaching portion is separated from the lock hole when the first attaching / detaching portion is moved vertically upward and opposite to the second attaching / detaching portion . A shoe body attached to the loader;
A first attachment / detachment portion configured to be attachable to the shoe body side, and configured to be attachable / detachable to / from the first attachment / detachment portion, and facing the side opposite to the side of the shoe body facing the bladder along the end portion. A shoe tip structure having a second attaching / detaching portion formed with a extending gripping claw
The first attaching / detaching portion is urged vertically downward by an elastic body that can be inserted into a hole formed in the shoe main body and disposed on an outer peripheral surface,
The second detachable part is formed with a lock hole that can be fitted to an end of the first detachable part,
The end of the first attachment / detachment portion opposite to the end that fits into the lock hole is formed in a substantially T shape, and along a groove provided around the hole formed in the shoe body. And can be rotated and raised,
When the first attaching / detaching portion is moved vertically upward and on the side opposite to the second attaching / detaching portion, the end of the first attaching / detaching portion is separated from the lock hole.
Shoe . A loader body,
A basket attached to the loader body;
A shoe main body attached to the basket, a first attaching / detaching portion configured to be attached to the shoe main body side, and configured to be attachable / detachable to / from the first attaching / detaching portion; And a tip end structure of a shoe having a second attaching / detaching portion formed with a gripping claw portion extending toward the opposite side and the opposite side,
The first attaching / detaching portion is urged vertically downward by an elastic body that can be inserted into a hole formed in the shoe main body and disposed on an outer peripheral surface,
The second detachable part is formed with a lock hole that can be fitted to an end of the first detachable part,
The end of the first attachment / detachment portion opposite to the end that fits into the lock hole is formed in a substantially T shape, and along a groove provided around the hole formed in the shoe body. And can be rotated and raised,
When the first attaching / detaching portion is moved vertically upward and on the side opposite to the second attaching / detaching portion, the end of the first attaching / detaching portion is separated from the lock hole.
Loader .

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