JP5661427B2 - Coating device - Google Patents

Description

  The present invention relates to a coating apparatus, and more particularly to a coating apparatus suitable for coating a coating liquid such as a lubricating liquid on the inner periphery of a bead portion of a tire in a tire manufacturing process.

  In the tire manufacturing process, there is a process of inspecting the weight balance of the molded tire. In this inspection process, the tire is mounted by fitting it into the upper and lower rims provided in the balance inspection device, and the weight unbalanced portion and the weight unbalance amount in the tire are inspected by rotating the tire in the mounted state. (For example, refer to Patent Document 1).

JP-A-8-15074

  The tire for which the balance inspection as described above has been completed is removed from the rim and conveyed to the next process. Therefore, before the tire is carried into the balance inspection device, a lubricant may be applied in advance to the tire bead so that the tire can be easily removed from the rim and transported to the next process after the balance inspection is completed. Has been done. As such application, for example, a method of applying the lubricant by spraying the lubricant directly onto the bead portion of the tire using a spray device is employed.

  However, in the case of the coating method in which the lubricating liquid is sprayed directly onto the tire bead portion as a coating liquid, the lubricating liquid is sprayed to a location other than the location where the coating is required. May remain and adhere to the surroundings, and the lubricating liquid may easily be consumed unnecessarily.Furthermore, the lubricating liquid may be sprayed around and deteriorate the working environment. There was a risk of becoming.

  The present invention has been made paying attention to such a situation, and provides a coating apparatus capable of accurately coating only a predetermined portion of a tire so that a coating liquid can be effectively used without waste. With the goal.

  In order to achieve the above object, the present invention is configured as follows.

(1) A coating apparatus according to the present invention includes a tire transport unit that transports a tire to and from a coating position, a coating roller that can contact the tire transported to the coating position, the tire, and the tire. A driving unit that relatively rotates the coating roller in contact with the coating roller and relatively moves the coating roller along an inner periphery of the tire; a coating solution supply unit that feeds the coating solution to the coating roller; and A coating liquid circulating means for collecting the excess coating liquid flowing down and returning it to the coating liquid supply means, a retreat position where the application roller is moved along its axial direction, and deviating from the tire conveyance path, and the center of the tire Roller moving means for switching to the application action position inserted into the hole, and a roller posture maintenance for receiving and supporting the tip side of the application roller at the application action position by a fixed receiving member. It is provided with a means, a.

 “Relative rotation of the tire and the application roller in contact with the tire” means that both the tire and the application roller are rotated, only the application roller in contact with the tire is rotated, or only the tire is Including the case of rotating.

  When both the tire and the application roller that contacts the tire are rotated, the driving means may rotate both of them or contact only by rotating only one of them. The other may be driven to rotate. For example, the application roller may be freely rotatable, and the application roller contacting the tire may be rotated by rotating the tire.

 “Relative movement of the application roller along the inner circumference of the tire” means that the application roller is moved along the inner circumference of the tire, the tire is rotated while keeping the inner circumference of the tire along the application roller, or This includes the case where the application roller is moved along the inner periphery of the tire and the tire is rotated while the inner periphery of the tire is moved along the application roller.

  The rotation of the tire and the application roller may be rotation in one direction, or may be rotation in both forward and reverse directions.

  According to the coating apparatus of the present invention, only the required amount of the coating solution is transferred and applied from the coating roller to the coating location such as the inner periphery of the bead portion of the tire, and remains attached or scattered around the location other than the coating location. Nor. Further, surplus coating liquid flowing down from the coating roller is collected and circulated and supplied to the coating roller again, so that it is possible to perform coating without waste.

According to the present invention , the application roller is in a state of being removed from the receiving member at the retracted position removed from the tire, and is in a fixed posture supported by the receiving member at the application operation position to withstand the pressure reaction force from the tire. Even if it is configured as a long application roller so as to be compatible with tires of various sizes, stable and uniform application can be performed without change in posture.

( 2 ) In a preferred embodiment of the coating apparatus of the present invention, the driving means includes a pair of support rollers pressed against the outer peripheral surface of the tire, the coating roller inserted into the center hole of the tire, and the pair of pairs The tire position is maintained in a three-point contact state with the support roller.

  According to this embodiment, after inserting the application roller into the central hole of the tire that has been carried into the application position, the application roller can be suitably brought into contact with the application site by pressing the support roller against the outer peripheral surface of the tire. And the position of the tire can be maintained.

( 3 ) In another embodiment of the coating apparatus of the present invention, the tire conveying means includes a pair of left and right conveyors that are driven by placing the tire in a posture in which the center hole thereof is directed upward and downward. It is possible to switch between a state where both are driven in the same direction and a state where both conveyors are driven in opposite directions.

  According to this embodiment, the loaded tires can be moved in a predetermined direction by driving the left and right conveyors in the same direction, and the left and right conveyors can be moved in opposite directions to be loaded. The tire thus rotated can be rotated in the circumferential direction on the conveyor, and a dedicated driving means for rotating the tire in the circumferential direction is not required, that is, the tire conveying means can also be used as the driving means.

( 4 ) In another embodiment of the coating apparatus of the present invention, the coating liquid supply means includes an annular jet part surrounding the coating roller, and the coating liquid is applied from the jet part to the outer peripheral surface of the coating roller. It is something to spray.

  According to this embodiment, the coating liquid can be supplied from the annular ejection section over the entire circumference of the outer peripheral surface of the coating roller without rotating the coating roller.

( 5 ) In still another embodiment of the coating apparatus of the present invention, tire information reading means for reading tire information of a tire information recording medium attached to the tire at a position facing the tire at the coating position as the tire rotates. The drive means rotates the tire relative to the application roller at the application operation position.

  According to this embodiment, it is possible to read the tire information from the tire information recording medium during the coating operation for rotating the tire, and a dedicated process for reading the tire information is not required, and the processing cycle as a whole is shortened. It becomes effective.

  As described above, according to the coating apparatus of the present invention, the coating liquid can be used without any waste and can be accurately applied to a coating location such as the inner periphery of the bead portion of the tire.

FIG. 1 is a longitudinal side view of a coating apparatus according to an embodiment of the present invention. FIG. 2 is a plan view of the coating apparatus of FIG. FIG. 3 is a rear view of the coating apparatus of FIG. FIG. 4 is a perspective view of a main part of the coating apparatus of FIG. FIG. 5 is a longitudinal sectional side view of a coating processing state by the coating apparatus of FIG. FIG. 6 is a longitudinal side view of a coating roller provided in the coating apparatus of FIG. FIG. 7 is a plan view of a coating solution supply means provided in the coating apparatus of FIG. FIG. 8 is a schematic perspective view of a tire conveying means provided in the coating apparatus of FIG. FIG. 9 is a perspective view showing a drive structure of a tire support roller provided in the coating apparatus of FIG. FIG. 10 is a schematic plan view for explaining a coating process performed by the coating apparatus of FIG. FIG. 11 is a schematic plan view for explaining the next processing step after the processing step of FIG. FIG. 12 is a schematic plan view for explaining the next processing step after the processing step of FIG. FIG. 13 is a schematic plan view for explaining the next processing step after the processing step of FIG.

  Hereinafter, a coating apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows a configuration of a longitudinal side surface of a coating apparatus according to an embodiment of the present invention, FIG. 2 shows a plan configuration thereof, FIG. 3 shows a rear configuration thereof, and FIG. A structure is shown and the structure of the vertical side surface of the coating device in a coating process state is shown in FIG.

  With reference to these drawings, the coating apparatus 1 of the embodiment is installed adjacent to the upper side in the transport direction of a balance inspection apparatus (not shown) for inspecting the weight balance of the tire W, and the coating apparatus 1 is In order to facilitate removal from the rim when the tire W attached by being fitted to the rim of the balance inspection device is removed after the balance inspection is completed, a lubricating coating solution such as a silicone solution is applied to the inner periphery of the bead portion of the tire. It is applied in advance before the balance inspection.

  In the coating apparatus 1, the tire W that has been carried in is placed in a posture in which the central hole is directed vertically, and the tire conveying means 2 that horizontally conveys the tire W that has been conveyed to a predetermined application position. A pair of left and right tire supports that hold the tire posture in a three-point contact state with the application roller 3 by pressing the outer periphery of the application roller 3 that can be moved up and down inserted into and removed from the central hole, and the application roller 3. A roller 4 and the like are provided.

  As shown in FIGS. 3 and 8 and the like, the tire conveying means 2 is configured by arranging two sets of left and right conveyors 5 in parallel. Each conveyor 5 supports a large number of support shafts 8 horizontally at a predetermined front-rear pitch over a conveyor frame 7 installed in parallel on the left and right on the apparatus frame 6, and a roller 9 is attached to each support shaft 8. It is configured as a roller conveyor that is supported freely. Most of the support shaft 8 is shared by the left and right conveyors 5, but the support shaft 8 is divided into left and right in a space formed between the both conveyors 5 so that the application roller 3 can be provided.

  Sprockets 10 are fixed to the lateral outer ends of the rollers 9, and a chain 13 extends over the sprockets 10 and a drive sprocket 12 of a motor 11 with a speed reducer attached to the rear end of the apparatus frame 6. The rollers 9 are driven to rotate in synchronization with each other, and the left and right conveyors 5 are independently driven. Each of the left and right motors 11 is configured to be able to switch the driving direction between forward and reverse. By driving both the conveyors 5 in the forward direction, the mounted tires W can be conveyed rearward.

  Moreover, the loaded tire W can be rotated on the spot by driving the conveyors 5 in opposite directions. In this embodiment, the two conveyors 5 constituting the conveying means 2 together with the pair of left and right tire support rollers 4 relatively rotate the tire W and the application roller 3 in contact with the tire W as will be described later, and the application roller. A driving means for relatively moving 3 along the inner periphery of the tire W is configured.

  As shown in FIG. 2, a reflection type optical sensor 14 a for detecting the loading of the tire W and a reflecting plate 14 b facing the same are installed at the front end portion of the tire conveying means 2, and the tire conveying means 2. At the rear end portion, a reflection type optical sensor 15a for detecting carry-out of the tire W and a reflection plate 15b facing the same are arranged.

  As shown in FIG. 6, the coating roller 3 is configured by surrounding the outer periphery of a hollow core cylinder 16 with a coating liquid impregnated layer 17 made of sponge fiber, woolen fabric, or the like, and is fixed to the apparatus frame 6. The liquid reservoir 18 is inserted from above. A guide shaft 19 is erected and fixed at the center of the bottom of the liquid reservoir tank 18, and a core cylinder 16 is inserted into the guide shaft 19 via a bearing bush 20 so as to be able to slide up and down and rotate.

  On the rear side of the liquid reservoir 18, an elevating cylinder 21 as a roller moving means is attached to the apparatus frame 6 in a vertical orientation, and a bearing bracket 22 provided at the upper end of the piston rod 21 a is attached to the core cylinder 16. An upper end support shaft 16 a is rotatably supported via a bearing 23. When the lifting cylinder 21 is shortened, the bearing bracket 22 at the upper end of the roller is retracted from the conveying surface of the tire conveying means 2 at the retracted position where the application roller 3 is lowered as shown in FIGS. As shown in FIG. 5, the elevating stroke of the application roller 3 is set so that the application roller 3 protrudes higher than the maximum size tire W at the position where the application roller 3 is lifted up most as shown in FIG. ing.

  As shown in FIG. 7, a nozzle 24 as an annular jet part surrounding the application roller 3 is disposed in the upper part of the liquid reservoir 18, and as shown in FIG. The stored coating liquid is pumped to the nozzle 24 by a pump 26 and sprayed and supplied to the coating roller 3 from the entire circumference. The nozzle 24 constitutes a coating liquid supply unit that supplies the coating liquid to the coating roller 3.

  The liquid reservoir 18 collects excess coating liquid that has flowed down from the coating roller 3, and returns the collected coating liquid to the tank 25 through the coarse first filter 27 and the fine second filter 28. It is designed to be reused. In this embodiment, the liquid reservoir tank 18, the tank 25, the pump 26, and the like constitute application liquid circulation means that recovers excess application liquid and returns it to the nozzle 24. The tank 25 is provided with a liquid level meter 29 so that it can be replenished at any time according to consumption of the coating liquid.

  A portal frame 30 erected from the apparatus frame 6 is provided above the front portion of the tire conveyance path. As shown in FIGS. 1 and 4, a bar code reader 32 as a tire information reading unit is disposed downward in the central portion of the left and right sides of the portal frame 30, and has a forward cantilever shape. A reflective optical sensor 34a is provided downward through the deployed front bracket 33. In addition, a reflection plate 34 b facing the optical sensor 34 a is attached to the upper surface of the bearing bracket 22 that supports the application roller 3.

  Further, a receiving member 35 that opens downward is fixed to the left and right sides of the lower surface of the front bracket 33, and when the application roller 3 is raised on the left and right side surfaces of the bearing bracket 22 that supports the upper end of the application roller 3. Engagement pins 36 engaged with the receiving member 35 are provided, and a roller attitude that prevents the application roller 3 from being vibrated and displaced due to the engagement between the receiving member 35 and the engaging pin 36. Holding means is configured.

  As shown in FIG. 2 and FIG. 9, a vertical fulcrum shaft 37 is rotatably supported via bearing pillows 38 on the left and right lateral sides of the apparatus frame 6. Each swing arm 39 is fixed, and a support roller 4 that is pressed against the outer periphery of the loaded tire W is pivotally supported on the free end portion of each swing arm 39 so as to be freely rotatable.

  A drive arm 37a provided on one fulcrum shaft 37 is driven to swing by the cylinder 40, and a linkage arm 37b provided on the fulcrum shaft 37 and a drive arm 37c provided on the other fulcrum shaft 37 are linked by a linkage link 37d. The left and right swing arms 39 are synchronized with each other by the expansion and contraction operation of the cylinder 40 so as to swing inward and outward around the fulcrum a.

  The application | coating operation | movement of the coating device comprised as mentioned above is demonstrated with reference to FIG.

  (1) In the initial state in which the tire W is not carried in, the application roller 3 is lowered to the retracted position where the application roller 3 is recessed from the conveyance surface of the tire conveyance device 2, and the left and right tire support rollers 4 are disposed on the left and right sides of the tire conveyance path. Evacuated. Further, the coating liquid is always ejected from the nozzle 24, and the coating liquid impregnated layer 17 of the coating roller 3 is impregnated with the coating liquid. As another embodiment of the present invention, the spray of the coating liquid from the nozzle 24 may be performed intermittently.

  (2) As shown in FIG. 10, when the molded tire W is carried into the tire conveying means 2, this is detected by the optical sensor 14a, and the left and right conveyors 5 of the tire conveying means 2 are detected based on this detection. Both are driven synchronously in the forward direction, and the tire W is conveyed straight forward.

  (3) When the front half of the tire W passes over the application roller 3, this is detected by the optical sensor 34a, and the tire is conveyed in a state where the application roller 3 and the part that moves up and down integrally with the application roller 3 face the central hole of the tire W. The means 2 is temporarily stopped.

  (4) Next, when the application roller 3 is raised and inserted into the center hole of the tire W from below and reaches the application operation position, the engagement pin 36 provided in the bearing bracket 22 is engaged with the receiving member 35. And the ascent is stopped.

  (5) Next, as shown in FIG. 11, the tire conveying means 2 is driven to rotate forward for a predetermined short time, the tire W is slightly advanced, and the inner periphery of the bead portion of the tire W is contacted and supported by the application roller 3. In addition, the cylinder 40 is extended to move the left and right tire support rollers 4 inward, pressing the outer circumference of the tire W forward, and the three points of the left and right tire support rollers 4 and the central application roller 3 are The tire W is held at a predetermined application position in the contact state.

  (6) When the tire W is held in the application position in this way, the left and right conveyors 5 are driven in opposite directions as shown in FIG. As a result, the tire W is rotated around its center while maintaining the three-point contact state, and the application liquid impregnated on the peripheral surface of the application roller 3 is applied to the tire W during the tire rotation. It is applied to the inner periphery of the bead.

  (7) On the upper surface of the bead portion, a barcode label 41 as a tire information recording medium in which tire information such as the size of the tire W and individual identification information is recorded is pasted in advance. In the meantime, the bar code label 41 is read by the upper bar code reader 32 to acquire tire record information, and this tire information is transmitted to a balance inspection device for inspecting the weight balance of the tire W for inspection. Used.

  (8) When the time required to rotate the tire W one or more times has elapsed, both the conveyors 5 are stopped, the tire support roller 4 is returned to the retracted position, and then the coating roller 3 is lowered to the standby height. Thus, the coating process is completed.

  (9) When the coating process is completed, as shown in FIG. 13, both conveyors 5 of the tire transport unit 2 are driven to rotate forward, and the tire W after the coating process is transported forward. The carry-out of the processed tire W is detected by the optical sensor 15a, and is used as information on resetting the coating apparatus 1 and conveying the tire to a subsequent apparatus.

(Other embodiments)
The present invention can also be implemented in the following forms.

  (1) The application roller 3 is configured to be rotationally driven by a motor or the like, and the nozzle 24 is provided at one place in the circumferential direction of the roller, and the application roller 3 is rotated in the process of inserting the application roller 3 into the center hole of the tire W. However, the coating liquid may be sprayed and supplied from the nozzle 24.

  (2) It is also possible to supply the coating liquid to the inside of the core cylinder 16 in the coating roller 3 and supply the coating liquid to the coating liquid infiltrating layer 17 on the outer periphery from a large number of small holes formed in the core cylinder 16.

  (3) As a roller posture holding means for engaging and supporting the upper end portion of the application roller 3 inserted into the center hole of the tire W, a taper pin that is tapered upward is provided on the bearing bracket 22 and a front bracket 33 is provided. It is also possible to prevent the upper end portion of the application roller 3 from moving back and forth and from side to side by providing a structure in which the alignment circular hole is formed in the guide hole and guiding the raised taper pin into the alignment circular hole.

  (4) In the above embodiment, the tire W at the application position is rotated by rotating the left and right conveyors 5 in the tire transport device 2 in opposite directions, but the tire W can be moved up and down at an appropriate position of the tire transport device 2. It is also possible to dispose a driving roller separately, raise the driving roller to lift the tire W from the tire transport device 2, and rotate the driving roller in this state to forcibly rotate the tire W.

  (5) In the above-described embodiment, the application process is performed by rotating the tire W carried into the application position with respect to the application roller 3. However, the application roller can rotate by fixing the tire W at the application position. It is also possible to adopt a form in which application is performed along the tire inner periphery by rotating 3 around the center of the tire W.

  (6) As a tire information recording medium attached to the tire W, a non-contact type IC chip or the like may be used in addition to the barcode label.

2 Tire transport means 3 Application roller 4 Tire support roller 5 Conveyor 24 Nozzle 41 Bar code label W Tire

Claims (5)

Tire conveying means for carrying the tire in and out of the application position;
An application roller capable of contacting the tire carried into the application position;
Driving means for relatively rotating the tire and the application roller in contact with the tire, and relatively moving the application roller along the inner periphery of the tire;
A coating liquid supply means for supplying a coating liquid to the coating roller;
A coating liquid circulating means for recovering excess coating liquid flowing down from the coating roller and returning it to the coating liquid supply means;
Roller moving means for moving the application roller along its axial direction to switch between a retracted position deviating from the tire conveyance path and an application working position inserted into the central hole of the tire;
Roller attitude holding means for receiving and supporting the tip side of the application roller at the application position by a fixed receiving member;
A coating apparatus comprising: The driving means includes a pair of support rollers pressed against the outer peripheral surface of the tire, and maintains the position of the tire in a three-point contact state between the application roller inserted into the center hole of the tire and the pair of support rollers. To
The coating apparatus according to claim 1. The tire conveying means includes a pair of left and right conveyors that are driven by placing the tires with the center hole facing up and down, and driving both conveyors in the same direction, and the two conveyors in opposite directions. It is possible to switch to the state of driving to
The coating apparatus according to claim 1 or 2. The application liquid supply means includes an annular jet part surrounding the application roller, and sprays the application liquid from the jet part to the outer peripheral surface of the application roller.
The coating device according to any one of claims 1 to 3. Provided with tire information reading means for reading tire information of a tire information recording medium attached to the tire as the tire rotates, at a location facing the tire at the application position;
The driving means rotates the tire with respect to the application roller at the application operation position.
The coating device according to any one of claims 1 to 4.

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