JP5518570B2 - Tire venting device - Google Patents

Description

  The present invention relates to a tire venting device for drilling a side surface of a tire.

  As shown in Patent Document 1, many pneumatic tires have a structure in which a carcass layer is disposed outside an inner liner and a belt layer and tread rubber are disposed outside the inner layer.

JP 2010-42893 A

  In such a pneumatic tire, air filled inside may pass through the inner liner and accumulate in the carcass layer. In this state, the tire may generate heat due to the use of a pneumatic tire, etc., and the air accumulated in the carcass layer may expand. For example, in the pneumatic tire inspection process, the air is removed from the side of the pneumatic tire. A venting process for drilling a hole is performed.

  However, this venting process is performed by a worker manually using a hand drill or the like, so that productivity is low.

  In consideration of the above-described facts, an object of the present invention is to provide a tire venting device that can punch a side surface of a pneumatic tire with high productivity.

According to the first aspect of the present invention, a plurality of venting needles for perforating a side surface of the tire and the plurality of venting needles are held along one circumference so as to face the same direction perpendicular to the circumference. A holding member that rotates, a rotating mechanism that simultaneously rotates the plurality of venting needles in the circumferential direction of the venting needle, and a plurality of the venting needles that move along the longitudinal direction and advance and retract to the side surface of the tire. A moving mechanism that moves the holding member; and an expansion / contraction mechanism that is provided on the holding member and displaces the plurality of venting needles to expand or contract the circumference of the circumference where the venting needles are arranged. .

  That is, since the plurality of venting needles are held by the holding member so as to face the same direction, the plurality of venting needles are moved in the longitudinal direction by the moving mechanism while simultaneously rotating the plurality of venting needles by the rotation mechanism. Move it forward and backward to the side of the tire. As a result, a plurality of holes can be drilled on the tire side face at a time, and productivity is increased.

In addition, when the venting needle is displaced and the diameter of the circumference on which the venting needle is arranged is enlarged or reduced in this way, the plurality of venting needles are also enlarged or reduced as a whole. As a result, drilling can be performed corresponding to different tire sizes.
According to a second aspect of the present invention, in the tire venting device according to the first aspect, the venting needles are arranged side by side in the circumferential direction of the circumference.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the moving mechanism can adjust a moving amount of the venting needle with respect to a side surface of the tire.

  Thereby, the depth of the hole drilled in the tire side surface can be adjusted.

  According to a fourth aspect of the present invention, in the first aspect of the present invention, the tire includes a support member that supports the tire from the radially inner side.

  By supporting the support member in this way, it is possible to suppress deformation and displacement of the tire due to the force applied from the venting needle during drilling. Since the support member supports the tire from the inside in the radial direction, it does not affect perforation by the venting needle.

  Since this invention was set as the said structure, it can drill on the side surface of a pneumatic tire with high productivity.

1 is a schematic perspective view showing a tire venting device according to an embodiment of the present invention together with a pneumatic tire. It is a perspective view showing a tire venting device of one embodiment of the present invention. It is a front view showing a tire venting device of one embodiment of the present invention. It is a front view showing a tire venting device of one embodiment of the present invention. FIG. 5 is a cross-sectional view taken along line VV in FIG. 3, showing a partially enlarged tire venting device according to an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially enlarged front view of a tire venting device according to an embodiment of the present invention, in which (A) shows a state in which the position of a venting needle is narrowed and (B) shows a state in which the position of a venting needle is widened It is. It is explanatory drawing of the state provided with two tire venting apparatuses of one Embodiment of this invention.

  1 and 2 show a schematic configuration of a tire venting device 12 according to an embodiment of the present invention.

  The tire venting device 12 has a flat plate 14 installed on the floor or the like. Two parallel slide rails 16 are fixed to the base plate 14. A slide box 18 is disposed on the base plate 14 so as to straddle the slide rail 16. A slide drive mechanism (not shown) is provided in the slide box 18 and is slid along the slide rail 16 in the direction of arrow A1 and in the opposite direction by being controlled by a control device (not shown).

  A support cylinder 20 is erected upward from the slide box 18, and an annular holding ring member 22 is fixed to the upper end of the support cylinder 20. As shown in detail in FIGS. 3 and 4, a plurality of expansion / contraction slots 24 extending in the radial direction are formed on the side surface 22 </ b> S of the retaining ring member 22. In the present embodiment, the number of the elongated holes 24 for expansion / contraction is eight, and the structure is formed at regular intervals in the circumferential direction. In the following description, the “radial direction” simply refers to the radial direction of the retaining ring member 22.

  As shown in FIG. 5, the holding ring member 22 is provided with a needle holder 28 for holding the venting needle 26 corresponding to each of the expansion / contraction elongated holes 24. The holding ring member 22 and the needle holder 28 constitute the holding member of the present invention, and the venting needle 26 is all oriented in the same direction so as to be parallel to the central axis CL (see FIG. 2) of the holding ring member 22. The bearing 28B is rotatably held. That is, the venting needles 26 protrude from the expansion / contraction elongated hole 24 while being held in parallel.

  As shown in FIG. 6, each of the needle holders 28 is provided with an expansion / contraction actuator 30, and along the expansion / contraction rail 32 provided along the radial direction in the holding ring member 22, the needle holder 28 is provided. 28 and the venting needle 26 can be moved in the radial direction (within the range of the expansion / contraction slot 24). Here, the respective expansion / contraction actuators 30 are driven and controlled to be synchronized by a control means (not shown). Specifically, the position of the needle holder 28 is controlled so that the plurality of venting needles 26 are always arranged on one circumference. Even when the venting needles 26 are moved in the radial direction, the plurality of venting needles 26 are newly located on one circumference. In other words, the diameter of the circumference formed by the venting needle 26 is expanded and contracted, and the venting needle 26 is expanded and contracted in the radial direction as a whole.

  A passive gear 34 is attached to each of the venting needles 26. A drive gear 38 that is rotationally driven by a motor 36 is provided in the slide box 18. An endless timing belt 40 (or a chain) is wound around the drive gear 38 and all the passive gears 34. Therefore, when the drive gear 38 is rotated by the motor 36, the timing belt 40 is also circulated and the passive gear 34 receives the rotational force. Thereby, all the venting needles 26 rotate at the same timing and the same angular velocity.

  As can be seen from FIGS. 6A and 6B, the timing belt 40 meshes with each of the passive gears 34 from the outside in the radial direction, so that the timing belt 40 moves even in the direction of the arrow A2. Engagement with the belt 40 is reliably maintained.

  As shown in FIGS. 2 to 4, a tension gear 42 and a buffer gear 44 are provided inside the support cylinder 20. The buffer gear 44 is urged in the direction of the arrow A3 by an urging means (not shown). If the winding length of the timing belt 40 around the passive gear 34 changes due to the expansion and contraction of the venting needle 26, the change is absorbed. It has become.

  Also, the holding ring member 22 is provided with two tension gears 46, and a predetermined tension is applied to the timing belt 40. In particular, the tension gear 46 is located radially inward from the passive gears 34 on both sides of the tension gear 46 when the venting needle 26 moves most radially inward. The meshing of the timing belt 40 can be reliably maintained.

  As shown in FIG. 1, the tire venting device 12 has an expanded expand rim 48 that holds the pneumatic tire 60 from the radially inner side. The expanded expand rim 48 can hold a plurality of types of tires by expanding and contracting according to the tire size. The expanded expanded rim 48 is supported on the floor surface or the like by a support member (not shown).

  Next, the method of drilling the side surface of the pneumatic tire 60 using the tire venting device 12 of the present embodiment and the operation of the tire venting device 12 will be described.

  In order to perforate the side surface of the pneumatic tire 60, first, as shown in FIG. 1, the pneumatic tire 60 is held by the expanded expanded rim 48. At this time, the center of the pneumatic tire 60 and the center of the retaining ring member 22 are aligned, and the venting needle 26 faces the tire side surface 60S of the pneumatic tire 60.

  Next, the expansion / contraction actuator 30 is driven as necessary to move all the venting needles 26 in the radial direction. That is, since the drilling position varies depending on the size of the pneumatic tire 60, the venting needle 26 is moved in accordance therewith (see FIGS. 3 and 4). However, regardless of the radial position of the venting needle 26, all the venting needles 26 are located on one circumference.

  When the radial position of the venting needle 26 is determined, the slide box 18 is then slid in the direction of the arrow A1 while the motor 36 is driven to rotate all the venting needles 26. By the venting needle 26, the tire side surface 60S of the pneumatic tire 60 is perforated. When the venting needle 26 moves in the direction of the arrow A1 by a predetermined length, the slide box 18 is retracted in the direction opposite to the arrow A1 and the venting needle 26 is pulled out from the tire side surface 60S of the pneumatic tire 60.

Thus, a hole can be made in the tire side surface 60S of the pneumatic tire 60. Since a plurality of holes can be drilled simultaneously by the plurality of venting needles 26, the tire side surface 60S of the pneumatic tire 60 can be drilled with high productivity .

  In addition, since the venting needle 26 can be moved in the radial direction in the tire venting device 12 of the present embodiment, drilling can be performed corresponding to the pneumatic tires 60 of different sizes. Furthermore, in the tire venting device 12 of the present embodiment, the depth of the hole can be adjusted by adjusting the amount of movement of the slide box 18 in the arrow A1 direction.

  In the present invention, as shown in FIG. 7, the tire venting device 12 is disposed on both sides of the pneumatic tire 60 held by the expanded expand rim 48, and the two tire side surfaces 60S are simultaneously drilled. Productivity may be further increased.

  In the above description, the moving mechanism of the present invention has a configuration in which the holding ring member is moved through the support cylinder 20 to advance and retract the plurality of venting needles 26 integrally with the tire side surface 60S of the pneumatic tire 60. As mentioned above, for example, each of the venting needles 26 may be provided with a moving mechanism. In this case, a control device (not shown) may synchronize the respective moving mechanisms so that the plurality of venting needles 26 advance and retract simultaneously.

  In the above, the rotation mechanism of the present invention has a configuration in which the driving force of a single motor 36 is transmitted to a plurality of venting needles 26 using a timing belt 40 (or chain) to simultaneously rotate the venting needles 26. As mentioned above, a motor may be provided for each of the venting needles 26 and the motor may be rotated in synchronization with the control device.

  As the expansion / contraction mechanism of the present invention, the configuration in which each of the venting needles 26 is provided with the expansion / contraction actuator 30 is described above. However, only one expansion / contraction actuator 30 is provided (or for each of the plurality of venting needles 26). 1), and using a link mechanism, a gear mechanism, or the like, the plurality of venting needles 26 may be moved in the direction of the arrow A2 shown in FIGS.

12 Tire venting device 16 Slide rail 18 Slide box (moving mechanism)
22 Retaining ring member (holding member)
24 Elongation hole 26 Venting needle 28 Needle holder (holding member)
30 Enlargement / reduction actuator (enlargement / reduction mechanism)
32 Rail for expansion / contraction (expansion / contraction mechanism)
34 Passive gear (rotating mechanism)
36 Motor (rotating mechanism)
38 Drive gear (rotating mechanism)
40 Timing belt (rotating mechanism)
48 Expanding expansion rim (supporting member)
60 Pneumatic tire 60S Tire side

Claims (4)

A plurality of venting needles to perforate the side of the tire;
A holding member that holds the plurality of venting needles along one circumference so as to face the same direction perpendicular to the circumference;
A rotating mechanism for simultaneously rotating the plurality of venting needles in the circumferential direction of the venting needles;
A moving mechanism for moving the holding member such that a plurality of the venting needles move along the longitudinal direction and move forward and backward to the side surface of the tire;
An expansion / contraction mechanism that is provided on the holding member and displaces a plurality of the venting needles to expand / contract the diameter of the circumference on which the venting needles are disposed;
A tire venting device. The tire venting device according to claim 1 , wherein the venting needles are arranged side by side in a circumferential direction of the circumference .   The tire venting device according to claim 1 or 2, wherein the moving mechanism is capable of adjusting a moving amount of the venting needle with respect to a side surface of the tire.   The tire venting device according to any one of claims 1 to 3, further comprising a support member that supports the tire from a radially inner side.

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