JP5960441B2 - Raw cover transport device - Google Patents

Description

  The present invention relates to a raw cover transport device for transporting a molded raw cover (pre-vulcanized tire) to a vulcanizer.

  A pneumatic tire is manufactured by conveying a molded raw cover to a vulcanizer and performing vulcanization (for example, Patent Documents 1 and 2).

  Specifically, the formed raw cover is once stacked horizontally in a rack, and is then gripped by an arm and transferred to a tray fixed on the raw cover transport device. And it conveys to a vulcanizer by a raw cover conveyance apparatus, and is transferred to a vulcanizer from a saucer by the arm of a vulcanizer after that.

JP 2009-269338 A JP 2007-320151 A

  However, since the raw cover is not vulcanized, its shape is easily deformed, and even if it is the same size raw cover formed in the same manner, the shapes are slightly different from each other. Also, the raw cover shape differs greatly for different tire sizes. In this way, when the raw cover with different shape is gripped by the arm in the same way and transferred to the tray, the tray is fixed in the conventional transport device, so there is a deviation between the center of the raw cover and the center of the tray. The raw cover may be tilted.

  When the raw cover in such a state is inserted into the vulcanizer as it is, in the product tire, L / T (long toe: a problem that the tip of the bead becomes long and may cause a fitting failure) or TWIST (twist: There is a risk that defects such as vibration, vehicle flow, and durability may be caused by defects in uniformity on the circumference, and uniformity may be deteriorated.

  Therefore, the present invention can suppress the deviation between the center of the raw cover and the center of the tray and the inclination of the raw cover before inserting the raw cover into the vulcanizer, and suppress the occurrence of defects and deterioration of uniformity. It is an object of the present invention to provide a raw cover transport device that can be used.

  As a result of intensive studies to solve the above problems, the present inventor has found that the above problems can be solved by the invention described below, and has completed the present invention.

The invention described in claim 1
A raw cover transport device for placing and transporting a raw cover in a horizontally stacked state on an annular tray provided on a transport machine,
A fixing portion is provided at a location corresponding to the center position of the tray on the transporter,
The fixing portion and the tray are connected by an elastic body, and the tray is configured to be swingable in a horizontal direction,
Further, the raw cover placement surface of the tray is formed in a tapered shape so as to gradually decrease from the outer periphery toward the inner periphery, and friction with the raw cover is reduced on the raw cover placement surface. raw cover conveying apparatus according to claim <br/> that roller-shaped friction reducing tool is provided for it.

The invention described in claim 2
2. The raw cover carrying device according to claim 1, wherein a taper angle of the raw cover placing surface is 10 to 30 [deg.].

The invention according to claim 3
3. The raw cover transport device according to claim 1, wherein the tray is configured to be swingable in a horizontal direction within a range of ± 5 cm.

The invention according to claim 4
Further, the bottom surface of the saucer and the transporter are connected by an elastic body arranged in the vertical direction, and the saucer is configured to be swingable in the vertical direction within a range of ± 2 cm. It is a raw cover conveyance apparatus of any one of Claim 1 thru | or 3.

The invention described in claim 5
Furthermore, it has a plurality of centering arms inserted inside the center hole of the raw cover placed in a horizontally stacked state on the tray,
5. The centering arms according to claim 1, wherein the plurality of centering arms are erected on a concentric circle centering on a center position of the tray and can be opened and closed radially. It is a raw cover conveyance apparatus as described in above.

  According to the present invention, before inserting the raw cover into the vulcanizer, the deviation between the center of the raw cover and the center of the tray and the inclination of the raw cover can be suppressed, and the occurrence of defects and deterioration of uniformity can be suppressed. It is possible to provide a raw cover transport device that can be used.

It is the schematic which shows typically the raw cover conveying apparatus of one embodiment of this invention. It is the schematic which shows the state in which the arm is holding the raw cover in the raw cover conveying apparatus of one embodiment of this invention. It is a perspective view shown in the saucer of the raw cover conveyance apparatus of one embodiment of this invention. It is the schematic which shows typically the raw cover conveying apparatus of other embodiment of this invention.

  Hereinafter, the present invention will be described with reference to the drawings based on embodiments.

(First embodiment)
The raw cover transport apparatus according to the present embodiment will be described with reference to FIG. 1, FIG. 2, and FIG. FIG. 1 is a schematic diagram schematically showing the raw cover transport device of the present embodiment, FIG. 2 is a schematic diagram showing a state where the arm is holding the raw cover in the raw cover transport device of the present embodiment, and FIG. These are the perspective views shown in the saucer of the raw cover conveying apparatus of this Embodiment.

1. Configuration of Main Parts of Raw Cover Transport Device As shown in FIG. 1, the raw cover transport device 1 includes an annular tray 11 having a raw cover mounting surface 11a on which the raw cover T is mounted in a horizontally stacked state, and a tray. 11 is provided with a transporter 14 loaded at a predetermined position.

  The tray 11 is tapered so that the raw cover placement surface 11a gradually decreases from the outer periphery toward the inner periphery. The taper angle θ (see FIG. 1B) of the raw cover placement surface 11a is preferably set to 10 to 30 °.

  Moreover, the roller-shaped friction reduction jig | tool 12 which reduces the friction with the raw cover T is arrange | positioned in the some location arrange | positioned equally in the circumferential direction of the raw cover mounting surface 11a. A plurality of friction reducing jigs 12 are arranged vertically (over the entire width) from the outer periphery to the inner periphery of the raw cover placement surface 11a. These friction reduction jigs 12 are preferably provided at six or more locations in order to make the raw cover T placed on the raw cover placement surface 11a move more smoothly in the vertical direction.

  In addition, the tray 11 is connected by a fixing portion 14 a provided at a location corresponding to the center position of the tray 11 on the transporter 14 and an elastic body 13, and the elastic body 13 is expanded and contracted to horizontally extend around the fixing portion 14 a. Is swingable. The elastic body 13 is preferably a coil spring, but is not limited thereto.

  The horizontal swing range of the tray 11 is appropriately adjusted to an appropriate range, for example, by adjusting the length, number, and elastic coefficient of the elastic body 13, but the tray when no external force acts on the tray 11. It is preferable to set a range of ± 5 cm with reference to the position of 11.

  In FIG. 3, reference numeral 35 denotes an arm for gripping the raw cover T provided in the vulcanizer, which is arranged so as to be movable up and down, and grips the raw cover T placed on the tray 1 by lowering. Operates to transfer to vulcanizer. The gripping arm provided in the raw cover transporting device operates to grip the raw cover T placed on the temporary rack and transfer it onto the tray 1 of the transporter 14.

2. Operation of Raw Cover Transport Device The raw cover T placed on the rack is placed on the tray 11 of the raw cover transport device 14 by the gripping arm and transported to the vulcanizer. Thereafter, the raw cover T on the tray 11 is transferred to the vulcanizer by the gripping arm 35.

  In the transfer and transport process of the raw cover T, as shown in FIG. 2A, when the raw cover T is about to be placed at an angle, the raw cover placement surface 11a has a plurality of locations. Since the friction reducing jig 12 is provided on the base plate, the friction between the tray 11 and the raw cover T is reduced, and the raw cover T moves on the friction reducing jig 12 to change from a tilted state to a horizontal state due to its own weight. Automatically changed.

  Further, as shown in FIG. 1A, when the raw cover T is to be placed on the tray 11 with the center of the raw cover T shifted from the center of the tray 11, as shown in FIG. As the tray 11 swings due to the expansion and contraction of the elastic body 13, the center cover is corrected by the raw cover T moving on the raw cover placement surface 11a of the tray 11. After that, when the tray 11 is released from the gripping arm, the tray 11 is returned to the original position by the elastic restoring force of the elastic body 13.

  Further, when the raw cover T on the tray 11 is transferred to the vulcanizer, even when the gripping arm 35 is displaced from the center of the raw cover T, the gripping arm 35 is lowered. When the gripping arm 35 is pushed, the tray 11 swings, and the raw cover T moves on the raw cover mounting surface 11a of the tray 11 so that the center of the raw cover T is positioned at the position of the gripping arm 35. Can be adapted to For this reason, the raw cover T is gripped by the gripping arm 35.

3. Effects of the present embodiment As described above, the raw cover can be inserted into the vulcanizer with the center deviation and the inclination eliminated, thereby reducing the occurrence of defects such as L / T and TWIST. And uniformity is improved.

(Second embodiment)
The raw cover transport apparatus according to the present embodiment will be described with reference to FIG. FIG. 4 is a schematic view schematically showing the raw cover transport device of the present embodiment. The raw cover transport device according to the present embodiment is based on the raw cover transport device according to the first embodiment, and further, a plurality of elastic bodies that extend and contract in the vertical direction are attached to the bottom surface of the tray, while A centering arm for centering the cover is provided.

1. 4 is a raw cover transport device, 41 is a tray, 41a is a raw cover mounting surface, 42 is a roller-like friction reducing jig, 43 is an elastic body, and 44 is a transport machine. 44a is a fixing portion for the loading surface, 45 is a centering arm having a moving mechanism, and 46 is an elastic body that expands and contracts in the vertical direction.

  The tray 41, the raw cover placement surface 41a, the roller-like friction reduction jig 42, the elastic body 43, the transporter 44, and the central portion 44a of the stacking surface of the transporter 44 of the raw cover transport device 4 of the present embodiment, The tray 11, the raw cover placement surface 11 a, the friction reduction jig 12, the elastic body 13, the transporter 14, and the central portion 14 a of the stacking surface of the transporter 14 are substantially the same as the tray 11 of the raw cover transport device 1 of the first embodiment. The detailed description is omitted.

  As shown in FIG. 4, the tray 44 of the raw cover transport device 4 of the present embodiment is supported from below by an elastic body 46 whose bottom surface 41 b stands on the stacking surface of the tray of the transporter 44 and expands and contracts in the vertical direction. Has been. The elastic bodies 46 are evenly arranged in the circumferential direction of the bottom surface 41 b of the tray 41. The tray 44 is supported by the elastic body 46 from below, and thus has a movable range of 2 cm vertically.

  This makes it possible for the tray 41 to move in the vertical direction, which is preferable because the degree of freedom in gripping the raw cover with the gripping arm (see FIG. 2) during transfer is further improved.

  The movable range in the vertical direction of the tray 41 is adjusted as appropriate, for example, by adjusting the length, number, and elastic coefficient of the elastic body 46, but the vertical range of movement of the tray 41 is up and down around a fixed position. It is preferably 2 cm in any direction.

  The centering arms 45 are provided to receive the raw cover T in the center of the receiving tray 41, and a plurality of centering arms 45 are provided inside the inner periphery of the receiving tray 41, and four in this embodiment. Each centering arm 45 is erected on a concentric circle centered on the center of the tray 41 and is configured to reciprocate in the radial direction of the concentric circle inside the inner periphery of the tray 41.

2. Operation of Raw Cover Conveying Device Next, the operation of the raw cover conveying device according to another embodiment of the present invention will be described. In the following description, portions different from the raw cover transport apparatus 1 of the first embodiment will be mainly described.

  The plurality of centering arms 45 are waiting for transfer of the raw cover T in a state where they can be inserted into the center hole of most of the raw cover T transferred from the rack, and the raw cover T is transferred from the rack. And inserted through the center hole of the raw cover T. After the insertion, the centering arm 45 moves in the radial direction, and all the centering arms 45 come into contact with the inner edge of the center hole of the raw cover T, whereby the raw cover T is accurately centered.

  The bottom surface 41 b of the tray 41 is supported from below by an elastic body 46 that stands on the stacking surface of the tray of the transporter 44 and expands and contracts in the vertical direction, so that the tray 41 can be moved up and down. In addition to this, coupled with the movement of the tray 41 in the horizontal direction, the degree of freedom of the tray 41 is further increased.

3. Effects of the present embodiment In the present embodiment, as described above, the degree of freedom of the tray 4 is increased and the accuracy of centering of the raw cover is increased, so that the shift and inclination of the center of the tray can be more reliably suppressed. Can be inserted into the vulcanizer.

  Next, the raw cover transport device of the present invention will be described more specifically with reference to examples.

1. Preparation of tire (Example)
In the examples, a raw cover for a tire size 215 / 45R / 17 91W LM704 is transported to a vulcanizer using the raw cover transport device of the first embodiment, and then vulcanized to produce a tire. This is an example. The number produced is 1,000.

  The comparative example is an example in which a raw cover similar to the example is transported to a vulcanizer using a conventional raw cover transport device with a receiving tray fixed, and then vulcanized to produce a tire. The number produced is 1,000.

2. Evaluation (1) Evaluation method a. L / T, TWIST occurrence status L / T (long toe), TWIST (twist) occurrence status was visually confirmed for the tires of the examples and comparative examples, and L / T (long toe), TWIST (twist) occurred. I counted the number of tires.

B. Uniformity Using the tires of Examples and Comparative Examples, RFV, LFV, and CON were measured, and an average value (Ave) and a standard deviation (σ) were obtained.

(2) Evaluation results a. L / T, TWIST Occurrence Status Table 1 shows the evaluation results of Examples and Comparative Examples. The unit is a book.

B. Table 2 shows the evaluation results of the examples and comparative examples. The unit is Newton (N).

  From Table 1, it was confirmed that in the examples, the number of L / T and TWIST generated was small and the generation of defects was reduced. Further, from Table 2, it is confirmed that the Ave (absolute value in the case of CON) and σ are reduced in all of the RFV, LFV, and CON in comparison with the comparative example, and the uniformity is improved. It was.

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

1, 4 Raw cover transport device 11, 41 Receptacle 11a, 41a Raw cover mounting surface 12 Friction reduction jig 13, 43 Elastic body 14, 44 Transporter 14a, 44a Fixing part 35 Grasping arm 41b Bottom surface 45 Centering arm T Raw cover θ angle

Claims (5)

A raw cover transport device for placing and transporting a raw cover in a horizontally stacked state on an annular tray provided on a transport machine,
A fixing portion is provided at a location corresponding to the center position of the tray on the transporter,
The fixing portion and the tray are connected by an elastic body, and the tray is configured to be swingable in a horizontal direction,
Further, the raw cover placement surface of the tray is formed in a tapered shape so as to gradually decrease from the outer periphery toward the inner periphery, and friction with the raw cover is reduced on the raw cover placement surface. raw cover conveying apparatus according to claim <br/> that roller-shaped friction reducing tool is provided for.
The raw cover carrying device according to claim 1, wherein a taper angle of the raw cover mounting surface is 10 to 30 °. The raw cover transport device according to claim 1 or 2, wherein the tray is configured to be swingable in a horizontal direction within a range of ± 5 cm. Further, the bottom surface of the saucer and the transporter are connected by an elastic body arranged in the vertical direction, and the saucer is configured to be swingable in the vertical direction within a range of ± 2 cm. The raw cover transport apparatus according to any one of claims 1 to 3. Furthermore, it has a plurality of centering arms that are inserted inside the center hole of the raw cover placed horizontally on the tray,
5. The centering arms according to claim 1, wherein the plurality of centering arms are erected on a concentric circle centering on a center position of the tray and can be opened and closed radially. The raw cover transport device according to 1.

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