JP5623669B1 - Raw tire detection mechanism - Google Patents

Abstract

The present invention provides a detection mechanism for a raw tire that can detect with high sensitivity the state in which a raw tire gripping shoe enters a bead portion of the raw tire and that is less likely to interfere with other devices. A detection mechanism 1 includes a base 3 attached to a raw tire gripping shoe 2, a first link 4, and a second link 5. The base 3 and the first link 4 are connected via a first shaft support 6. The first link 4 is configured to be rotatable within a certain range with the first shaft support 6 as a central axis. Further, the first link 4 and the second link 5 are connected via a second shaft support portion 8. The second link 5 is configured to be rotatable within a certain range with the second shaft support portion 8 as a central axis. [Selection] Figure 1

Description

  The present invention relates to a raw tire detection mechanism. Specifically, the present invention relates to a raw tire detection mechanism that can detect with high sensitivity the state in which the raw tire gripping shoe has entered the bead portion of the raw tire, and that is less likely to interfere with other devices.

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

  The green tire is gripped by the loader from above the post-molding table, and conveyed into the mold of the tire vulcanizer. The loader has a plurality of raw tire grip shoes for gripping the bead portion of the raw tire at the tip, and the raw tire grip shoes have a structure that can be expanded and contracted in the radial direction of the raw tire.

  First, the raw tire gripping shoe is moved into the upper bead portion of the raw tire by lowering the loader, and the raw tire gripping shoe is enlarged and engaged with the inner peripheral edge of the upper bead portion. In this state, by raising the loader, the raw tire is lifted from the table and moved into the mold.

  Here, since the raw tire is mainly made of rubber, it may be deformed by its own weight on the table after molding. Therefore, it is necessary to detect whether the position of the upper bead portion varies and whether the raw tire gripping shoe has surely entered the upper bead portion.

  As a raw tire detection device for detecting whether the raw tire gripping shoe has surely entered the inside of the upper bead portion, for example, those shown in FIGS. 7A and 7B are known. Yes.

  In the detection device 100 shown in FIG. 7A, an arm member 103 is connected to a bracket 102 provided on the outer surface of the raw tire gripping shoe 101 so as to be rotatable in the vertical direction by a shaft support portion 104. A detection bar 105 is integrally attached to the arm member 103.

  As shown in FIG. 7B, when the raw tire gripping shoe 101 enters the inside of the upper bead portion T1 of the raw tire T, the detection bar 105 is pushed up by the upper bead portion T1 and rotated upward by the shaft support portion 104. Move.

  As a result, the arm member 103 is separated from the proximity switch 106 as a detection sensor, and the raw tire gripping shoe 101 is detected to have entered the upper bead portion T1 of the raw tire T.

  Note that the detection bar 105 is biased downward by a spring and rotates upward from the position. The rotation range H needs to be set to a range sufficient to continuously detect the state in which the raw tire gripping shoe 101 enters the inside of the upper bead portion T1.

  Further, the shaft support portion 104 is provided on the upper side so that the shaft support portion 104 does not interfere with the raw tire T in a state where the raw tire gripping shoe 101 enters the inside of the upper bead portion T1. Therefore, the detection bar 105 is formed so as to be inclined downward from the shaft support portion 104 in the distal direction.

  However, in the detection apparatus 100 shown in FIGS. 7A and 7B, the detection bar 105 is formed so as to be inclined downward from the shaft support portion 104 in the distal direction as described above. With this shape, there is no problem when the upper bead portion T1 comes into contact with the distal end side of the detection bar 105, but depending on how the raw tire T is deformed, the upper bead portion T1 may come into contact with the proximal end side of the detection bar 105. is there.

  In this case, at the beginning of the raw tire gripping shoe 101 entering the inside of the upper bead portion T1, the contact of the upper bead portion T1 with the detection bar 105 is delayed, and there is a problem that the detection at the initial stage cannot be performed.

  In order to perform detection at the initial stage, the downward inclination angle of the detection bar 105 is reduced. Here, in order to reduce the downward inclination angle while sufficiently taking the rotation range H of the detection bar 105, it is necessary to increase the distance L from the raw tire gripping shoe 101 to the shaft support portion 104.

  However, if the distance L is increased, the detection device 100 protrudes outward from the raw tire gripping shoe 101. As a result, there arises a problem that the detection device 100 interferes with ancillary equipment on a table on which a raw tire is placed.

  The present invention was devised in view of the above points, and can detect a state in which a raw tire gripping shoe enters a bead portion of the raw tire with high sensitivity, and does not easily cause interference with other devices. An object of the present invention is to provide a detection mechanism.

  In order to achieve the above object, a raw tire detection mechanism according to the present invention includes a base member attached to a raw tire gripping shoe of a loader, and a first connecting portion connected to the base member at one end. A first link configured to be rotatable within a predetermined range about the first connecting portion, and at a side opposite to the base member of the first link and at the other end of the first link. A second connecting portion connected to the first link is provided, and the second link is configured to be rotatable within a predetermined range about the second connecting portion, and disposed at the end of the second link. And a detection portion that contacts a bead portion of the raw tire into which the raw tire gripping shoe is inserted, and a base member opposite to the first link, and is capable of detecting the proximity or separation of the second link A sensor unit.

  Here, the raw tire detection mechanism can be arranged on the raw tire gripping shoe by the base member attached to the raw tire gripping shoe of the loader.

  Further, the first link connected to the base member has a structure in which the first link is connected to the base member and the green tire gripping shoe.

  In addition, the first link is provided with a first connecting portion at one end, and is configured to be rotatable within a predetermined range around the first connecting portion. It can be rotated.

  In addition, the second link is connected to the first link at the other end of the first link on the side opposite to the base member of the first link, so that the second link becomes the first link, the base member, and the raw tire grip shoe. It becomes the structure connected to. Further, the second link moves as the first link rotates.

  Further, the second link is provided with a second connecting portion, and is configured to be rotatable within a predetermined range about the second connecting portion as an axis, whereby the second link can be rotated within a certain range. It becomes possible.

  In addition, a first link is provided at one end, and the first link is configured to be rotatable within a predetermined range around the first link and the other link is connected to the other end of the first link. The second link is provided by the second link configured to be rotatable within a predetermined range around the second connection portion, and the second link is connected to the first connection portion and the second connection portion. It can be rotated via two axes.

  In this case, for example, if a force is applied to the region of the second link away from the first connection portion in the direction of rotation about the first connection portion, the second link is accompanied by the rotation of the first link. Will rotate. On the other hand, if a force is applied to the region of the second link away from the second connection portion in the direction of rotation about the second connection portion, the first link does not move and the second link rotates. To be. That is, the second link can be rotated according to the region where the force is applied to the second link.

  Furthermore, in this case, if a force is applied to the second link in a direction in which both the first connection portion and the second connection portion are rotated, the rotation of the second link accompanying the rotation of the first link. Then, both rotations of the second link occur. That is, for example, when the first connecting portion and the second connecting portion are arranged on substantially the same plane, the rotation range of the second link can be made sufficiently large.

  Further, the second link can be rotated by a detection unit that is arranged at the end of the second link and that contacts the bead portion of the raw tire into which the raw tire gripping shoe is inserted. That is, when the detection unit and the bead portion of the raw tire are in contact with each other, a force is applied to the second link, and the first connection unit and the second connection unit can be rotated as axes.

  Further, a raw tire gripping shoe is provided by a detection unit disposed at an end of the second link and in contact with a bead portion of the raw tire into which the raw tire gripping shoe is inserted, and a sensor unit capable of detecting the proximity or separation of the second link. It is possible to detect the insertion of the inside of the bead portion. That is, for example, the raw tire gripping shoe enters the inside of the bead portion of the raw tire, and the second link rotates with the contact between the detection portion and the bead portion. It can be shown that the raw tire gripping shoe has entered the inside of the upper bead portion by setting the state in which the second link is rotated and close to the sensor portion as a detection state.

  Further, when at least a part of the base member is in contact with the first link and the second connecting portion and is sandwiched between the first link and the second connecting portion, the base member is restrained by the first link and the second link. The blur can be reduced. That is, the detection mechanism has a stable structure, and more reliable detection can be performed.

  In addition, when the range of rotation about the first connecting portion of the first link is approximately equal to the range of rotation about the second connecting portion of the second link, the second link Therefore, the rotation by the first connecting portion and the rotation by the second connecting portion occur within a substantially equivalent range. That is, for example, when the second link and the detection unit in a state before rotation are formed in a substantially horizontal posture, the second link is rotated about both the first connection unit and the second connection unit. In this state, the second link and the detection unit take a substantially horizontal posture. As a result, the posture of the detection state of the second link is stabilized, and more accurate detection can be performed. In addition, the detection state can be maintained stably.

  Further, the rotation of the first link about the first connection portion as an axis is regulated by the first notch formed in the base member and the second connection portion being in contact with each other, and the second connection of the second link is controlled. When the second notch formed on the second link and the first connecting part are in contact with each other and the rotation about the part is regulated, only the base member, the first link, and the second link member Thus, each rotation can be restricted, and the detection mechanism of the raw tire can be made compact.

  The raw tire detection mechanism according to the present invention can detect with high sensitivity the state in which the raw tire gripping shoe has entered the bead portion of the raw tire, and is less susceptible to interference with other devices.

It is the schematic which looked at the whole elephant of the detection mechanism which is an example of the detection mechanism of the raw tire to which the present invention is applied from the upper surface. It is the schematic which looked at the whole elephant of the detection mechanism from the front. It is the schematic which shows rotation centering on a 1st axial support part. It is the schematic which shows rotation centering on a 2nd axis | shaft support part. It is the schematic which shows the state which both rotation by the 1st axis support part and the 2nd axis support part produced. It is the schematic which looked at the whole elephant of the detection mechanism which has the structure where a part of base was pinched | interposed into the shaft head of the 1st link and the 2nd shaft support part from the upper surface. It is the schematic which shows the structure of the conventional loader.

Hereinafter, embodiments of the present invention will be described with reference to the drawings to facilitate understanding of the present invention.
FIG. 1 is a schematic view of an entire elephant of a detection mechanism as an example of a raw tire detection mechanism to which the present invention is applied as viewed from above. FIG. 2 is a schematic view of the entire elephant of the detection mechanism as viewed from the front. 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. 1, a detection mechanism 1, which is an example of a raw tire detection mechanism to which the present invention is applied, includes a base 3 attached to a raw tire gripping shoe 2, a first link 4, and a second link. A link 5 is provided.

  Further, the base 3 and the first link 4 are connected via a first shaft support 6. The first shaft support 6 is located at one end of the first link 4, passes through two holes in the base 3 and part of the first link 4, penetrates the two members in the horizontal direction, The members are connected.

  The first shaft support 6 has a structure having a first shaft head 7 on the second link 5 side. Further, the end portion of the first shaft support portion 6 on the side opposite to the first shaft head 7 is partially welded to the base 2 and the connected state is fixed. The first link 4 is configured to be rotatable within a certain range with the first shaft support 6 as the central axis.

  Further, the first link 4 and the second link 5 are connected via a second shaft support portion 8. The second shaft support portion 8 is located on the other end side of the first link, passes through the two holes in the horizontal direction through the holes formed in a part of the first link 4 and the second link, Both members are connected.

  The second shaft support portion 8 has a structure having a second shaft head 9 on the base 3 side. Further, the end portion of the second shaft support portion 8 opposite to the second shaft head 9 is partially welded to the second link, and the connected state is fixed. The second link 5 is configured to be rotatable within a certain range with the second shaft support portion 8 as a central axis.

  Due to the structure described above, the first shaft support 6 and the second shaft support 8 are both located on the first link 4. The base 3 and the second link 5 are arranged on both sides of the first link 4.

  Here, it is sufficient that the first shaft support portion 6 is configured to connect the base 3 and the first link 4 so that the first link 4 can be rotated within a certain range, and the connection structure is particularly limited. It is not a thing. However, it is preferable that a part of the first shaft support portion 6 is fixed to the base 2 by welding in order to obtain a stable structure.

  Further, it is sufficient that the second shaft support portion 8 is configured to connect the first link 4 and the second link 5 and to be able to rotate the second link 5 within a certain range, and the connection structure is particularly limited. It is not something. However, it is preferable that a part of the second shaft support portion 8 is fixed to the second link 5 by welding from the point of forming a stable structure.

  As shown in FIG. 1, the detection mechanism 1 is provided with a proximity sensor 10 that can detect the proximity or separation of the second link 5 without contact. The proximity sensor 10 is positioned vertically above the first link 5 and is disposed in the hole 11 provided in the base 3 to sense the second link 5. And when the 2nd link 5 is located on the horizontal direction axis line of the proximity sensor 10, it will be in a detection state.

  Therefore, when the second link 5 rotates and its position changes, it can be detected if the second link 5 is partially located on the horizontal axis of the proximity sensor 10. In FIG. 1, the proximity sensor 6, the base 3, the first link 4, and the second link 5 are arranged in order from the side where the raw tire gripping shoe 2 is located.

  Here, the proximity sensor 10 is sufficient if it can detect the proximity or separation of the second link, and the detection method and structure are not particularly limited. However, a non-contact sensor structure is preferable from the viewpoint of ensuring durability due to repeated use.

  As shown in FIG. 2, in the detection mechanism 1, a detection plate 12 is attached to the lower end of the second link 5. The detection plate 12 is a plate-like member disposed substantially perpendicular to the second link 5. Moreover, a partial inclination is provided on the tip side.

  This detection plate 12 is a member that comes into contact with the upper bead portion of the raw tire. When the raw tire gripping shoe 2 is inserted into the upper bead portion, the detection plate 12 comes into contact with the bead portion and rotates the second link 5. It becomes a part where power is applied.

  Moreover, the detection mechanism 1 shown in FIG. 2 shows a state where the detection plate 12 is not in contact with the upper bead portion of the green tire, that is, a state where no force is applied in the direction in which the second link 5 rotates. Yes.

  In the state of FIG. 2, the vertical height position of the detection plate 12 is positioned below the vertical height position of the lower end 13 of the base 3. The first shaft support 6 and the second shaft support 8 are located at the same height in the vertical direction.

  Further, as shown in FIG. 2, a first stopper portion 14 is formed on the side surface of the base 3. The first stopper portion 14 is a region that comes into contact with a part of the second shaft support portion 8, and is in a range of contact with the second shaft support portion 8, and the first link 4 in the vertical direction about the first shaft support portion 6. Regulates rotation. In addition, the rotation range which the 1st stopper part 14 controls is shown with the code | symbol H1 in FIG.

  A second stopper portion 15 is formed on the side surface of the second link 5. The second stopper portion 15 is a region that comes into contact with a part of the first shaft support portion 6, and is in a range of contact with the first shaft support portion 6, in the vertical direction about the second shaft support portion 8. Regulates rotation. In addition, the rotation range which the 2nd stopper part 15 controls is shown with the code | symbol H2 in FIG.

  Moreover, the length of the 1st stopper part 14 and the 2nd stopper part 15 is substantially equivalent length. That is, the reference sign H1 and the reference sign H2 in FIG. 2 are substantially equivalent, and the rotation range of the first link 4 with the first shaft support portion 6 as an axis and the second link 5 with the second shaft support portion 8 as an axis. The rotation range is substantially the same range.

  Here, the lengths of the first stopper portion 14 and the second stopper portion 15 do not necessarily have to be substantially equal. However, as will be described later, it is preferable that the lengths of the first stopper portion 14 and the second stopper portion 15 are substantially equal from the viewpoint of easily stabilizing the posture in the detection state of the second link.

In order to deepen the understanding of the present invention, the detailed operation of the detection mechanism 1 for raw tire described above will be described.
FIG. 3 is a schematic diagram showing rotation about the first shaft support. FIG. 4 is a schematic diagram showing rotation about the second shaft support portion. FIG. 5 is a schematic view showing a state in which both rotations by the first shaft support portion and the second shaft support portion have occurred.

  First, when the loader descends and the raw tire gripping shoe enters the upper bead portion of the raw tire, the upper bead portion contacts the detection plate 12. In FIG. 3, the upper bead portion (not shown) of the green tire is in contact with the region 16 on the front end side of the detection plate 12.

  As shown in FIG. 3, when the upper bead portion comes into contact with the region 16 on the front end side of the detection plate 12, the first link 4 is pivoted about the first shaft support portion 6. 3 shows the first link 4 and the second link 5 in a state where the second shaft support portion 8 is in contact with the upper portion of the first stopper portion 14 and the rotation of the first link 4 is stopped. .

  If the 1st link 4 rotates, it will be lifted from the front end side of the detection board 12 in connection with it, and the 2nd link 5 and the detection board 12 will be in the state inclined. With this movement, a part of the upper end of the second link is positioned on the horizontal axis of the hole 11. As a result, the proximity sensor 10 detects the second link 5 and can detect that the detection mechanism 1 has entered the inside of the bead portion of the raw tire of the raw tire gripping shoe.

  On the other hand, in FIG. 4, the upper bead portion (not shown) of the raw tire is in contact with the region 17 on the proximal end side of the detection plate 12.

  As shown in FIG. 4, when the upper bead portion comes into contact with the region 17 on the proximal end side of the detection plate 12, upward rotation of the second link 5 with the second shaft support portion 8 as an axis occurs. 4 shows a state in which the first shaft support portion 6 is in contact with the lower portion of the second stopper portion 15 and the rotation of the second link 5 is stopped.

  When the second link rotates, it is lifted from the base end side of the detection plate 12, and the second link 5 and the detection plate 12 are inclined. With this movement, a part of the upper end of the second link is positioned on the horizontal axis of the hole 11. As a result, the proximity sensor 10 detects the second link 5 and can detect that the detection mechanism 1 has entered the inside of the bead portion of the raw tire of the raw tire gripping shoe. Moreover, even if rotation about the second shaft support portion 8 occurs, the position of the first link 4 remains unchanged.

  FIG. 5 shows a state in which both the first link 4 and the second link 5 described above are rotated in the detection mechanism 1. When the lower end of the detection plate 12 is in a wide range and contacts the upper bead portion of the raw tire, both rotations about the first shaft support portion 6 and the second shaft support portion 8 occur. Note that this rotation also occurs when the upper bead portion comes into contact with the vertically inclined region of the detection plate 12 from the state shown in FIG. 3 or FIG. Further, the diagram indicated by the dotted line in FIG. 5 shows a state in which the second link 5 is completely lifted vertically upward by rotation about the first shaft support portion 6 and the second shaft support portion 8.

  As shown in FIG. 5, when both rotations about the first shaft support portion 6 and the second shaft support portion 8 occur, the rotation is restricted by the first stopper portion 14 and the second stopper portion 15, and the base 3 The second link 5 is lifted up to a height position at which the lower end 13 and the lower end of the detection plate 12 are aligned. By this movement, the proximity sensor 10 detects the second link 5 and detects that the detection mechanism 1 has entered the inside of the bead portion of the raw tire of the raw tire gripping shoe.

  Further, the postures of the second link 5 and the detection plate 12 are maintained in the horizontal direction before and after the rotation.

  As described above, in the detection mechanism 1, the second link 5 is rotated by contacting the upper bead portion of the raw tire on both the distal end side and the proximal end side of the detection plate 12. That is, even if the raw tire is deformed on the pedestal and the position of the upper bead portion varies, the initial stage of contact with the bead portion can be detected efficiently.

  Further, the rotation of the first link 4 and the second link 5 is regulated within a predetermined range by providing the first stopper portion 14 and the second stopper portion 15, and accordingly, with the rotation, Separation between the members does not occur, and stable movement is performed.

  Further, the second link 5 can be rotated by the two shafts of the first shaft support 6 and the second shaft support portion 8, and a sufficient rotation distance of the second link can be maintained. . Further, since the rotation of the detection plate 12 can be detected while the amount of protrusion of the detection plate 12 in the horizontal direction is reduced by passing through two stages of rotation, the detection device 1 can detect the raw tire table. It has a structure that hardly interferes with incidental devices.

  In addition, since the rotation ranges restricted by the first stopper portion 14 and the second stopper portion 15 are formed substantially equal, the postures of the second link 5 and the detection plate 12 are made the same before and after the rotation. be able to.

  In the detection apparatus 1, since the detection plate 12 is disposed substantially horizontally, the postures of the second link 5 and the detection plate 12 after rotation are also substantially horizontal. As a result, the posture of the second link 5 can be stabilized and detection can be performed more accurately while the detection of the state in which the raw tire gripping shoe has entered the bead portion is continued.

Next, another embodiment relating to the structure of the raw tire detection mechanism to which the present invention is applied will be described.
FIG. 6 is a schematic view of the entire eleventh view of the detection mechanism having a structure in which a part of the base is sandwiched between the shaft heads of the first link and the second shaft support portion, as viewed from above.

  The raw tire detection mechanism 18 shown in FIG. 6 includes a base 19, a first link 20, and a second link 21. In addition, since the basic structure is the same as that of the detection mechanism 1 mentioned above, below, only the part from which a structure differs is demonstrated.

  Of the detection mechanism 18, the first link 20 and the second link 21 are connected via a second shaft support portion 22. The second shaft support portion 22 has a structure having a second shaft head 23 on the base 19 side.

  In this detection mechanism 18, the second shaft head 23 of the second shaft support portion 22 is positioned further outside the partial region 24 of the base 19, and the base 19 is interposed between the second shaft head 23 and the first link 20. The region 24 is sandwiched and held.

  Further, the end of the second shaft support 22 opposite to the second shaft head 23 is partially welded to the second link 21, and the connected state is fixed. That is, the first link 20 is sandwiched between the base 19 and the second link 21, and the base 19 is connected to the first shaft and the second shaft head 23 of the second shaft support portion 22, which is partially fixed to the second link. It has a structure sandwiched between.

  More specifically, since the region 24 of the base 19 has a structure sandwiched between the second shaft head 23 and the first link 20, the base 19 is less likely to shake in the horizontal direction. As a result, even when the raw tire gripping shoe moves, the base 19 is stabilized and the upper bead portion can be detected more reliably.

  The raw tire detection mechanism to which the present invention is applied can be formed as a more stable structure by adopting the connection structure as described in the detection mechanism 18.

  As described above, the raw tire detection mechanism of the present invention can detect the state in which the raw tire gripping shoe enters the bead portion of the raw tire with high sensitivity, and is less likely to cause interference with other devices. Yes.

DESCRIPTION OF SYMBOLS 1 Detection mechanism 2 Raw tire grip shoe 3 Base 4 1st link 5 2nd link 6 1st axial support part 7 1st axial head 8 2nd axial support part 9 2nd axial head 10 Proximity sensor 11 Hole 12 Detection plate 13 Base of 13 Lower end 14 First stopper portion 15 Second stopper portion 16 Region on the front end side of the detection plate 17 Region on the proximal end side of the detection plate 18 Detection mechanism 19 Base 20 First link 21 Second link 22 Second shaft support portion 23 Second shaft Head 24 Base partial area

Claims (2)

A base member that is attached to the raw tire gripping shoe of the loader;
A first link configured to be pivotable within a predetermined range around the first coupling portion, the first coupling portion coupled to the base member at one end;
A second connecting portion connected to the first link is provided on the opposite side of the first link from the base member and at the other end of the first link. A second link configured to be rotatable in a range;
A detection unit disposed at an end of the second link and in contact with a bead portion of the raw tire into which the raw tire gripping shoe is inserted;
A sensor unit provided on the opposite side of the base member from the first link and capable of detecting the proximity or separation of the second link ;
A raw tire detection mechanism in which at least a part of the base member is in contact with the first link and the second connecting portion and is sandwiched therebetween . The rotation of the first link about the first connecting portion as an axis is regulated by contacting the first notch formed in the base member and the second connecting portion,
The rotation of the second link about the second connecting portion as an axis is regulated by the second notch formed in the second link and the first connecting portion coming into contact with each other. Item 3. The raw tire detection mechanism according to Item 2.

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