JP5670116B2 - Adsorption holding device for belt-shaped members - Google Patents

Description

The present invention, the position of the belt-shaped member, when the width is changed, Adsorption coercive JiSo location of the belt-shaped member which can be easily cope with this change.

The suction holding JiSo location of a conventional belt-shaped member, there is known, as described for example in Patent Documents 1 and 2 below.

JP 63-306151 A Japanese Utility Model Publication No. 6-74244

    First, in Patent Document 1, there are a plurality of vacuum passages that extend in the axial direction inside, and a radially outer end that extends radially outward from the vacuum passage and that is open to the outer surface and spaced apart in the axial direction. A suction port that is formed in a vacuum passage, and is connected to the vacuum passage and sucks air in the vacuum passage, thereby reducing the pressure in the suction passage communicating with the vacuum passage, There is disclosed a device including a suction unit that sucks and holds a belt-shaped member by a suction port that has been made into a negative pressure, and a grip body that can approach and separate from the outer periphery of the suction roll.

  Then, after adsorbing the end of the belt-like member by the outer end opening of the suction roll (suction port), the suction roll is rotated to wind up the end of the belt-like member about 1/4 turn, The gripping body is brought close to the suction roll, and the end of the belt-shaped member is gripped by the gripping body and the suction roll. As a result, even if the width of the belt-like member changes (for example, becomes narrow) and a suction port that sucks air is generated, if the end of the belt-like member can be wound up while being sucked, It is possible to hold the belt-shaped member.

  However, in this case, as described above, when the width of the band-shaped member is narrowed to generate a suction port that sucks only air and does not perform the function of holding the suction, a steel cord or the like is embedded in the band-shaped member. When the bending rigidity is high, the end of the belt-like member cannot be wound up while adsorbing, and the holding may fail. Further, since the end of the belt-shaped member is sandwiched between the gripping body and the suction roll at a predetermined pressure, the belt-shaped member at the sandwiched portion is thinned by the rubber flow, and as a result, a product (for example, a pneumatic tire) There is also a problem that the quality of the product may be adversely affected.

  In order to solve such a problem, the suction holding device described in Patent Document 2 is applied to the end gripping device described in Patent Document 1, and a cylinder chamber is disposed in the middle of each suction port. When the chuck member is spaced apart from the belt-like member, a piston member loosely fitted to the piston member and a coil spring that biases the piston member toward the chuck surface is provided. When the piston member is moved away from the chuck surface by the pressure difference acting to block the suction port, the belt-shaped member is in close contact with the chuck surface and the pressure acting on the upper and lower surfaces of the piston member becomes the same. It can be conceived that the member opens the suction port by the biasing force of the coil spring and automatically adsorbs the belt-like member. And in this thing, it can respond to the change of the width | variety of a strip | belt-shaped member, without performing a special operation | work, and since it is not necessary to clamp a strip | belt-shaped member, a flow arises in the rubber which comprises this strip | belt-shaped member There is no need to bend even a belt member having a high bending rigidity. Therefore, the holding of the belt member does not fail.

    However, it is necessary to install a chuck consisting of a cylinder chamber, a piston member, and a coil spring at each suction port. That is, the same number of chucks as the suction ports need to be installed on the suction roll, so the structure is complicated and large. There is a problem that the manufacturing cost becomes expensive.

The present invention is a small structure is simple, yet inexpensive, the position of the belt-shaped member, even if there is a change in the width, to provide a suction coercive JiSo location of the belt-shaped member which can be easily deal with this Objective.

These objects, one in which one end is opened to the outer surface, a plurality of suction holding member provided longitudinally spaced suction passage said storage space communicating with the receiving space and the other end formed therein Two pistons which are stored in the storage space and divide the storage space into a play area and a sealed negative pressure area, and are connected to the negative pressure area of the storage space, and the air in the negative pressure area is By sucking, the inside of the suction passage communicating with the negative pressure region becomes negative pressure, and the suction means for sucking and holding the belt-like member by the negative pressure suction passage, and the piston is moved in the longitudinal direction of the storage space. And moving means for changing at least one of the position and the length of the negative pressure region in the storage space, and forming the negative pressure region between the two pistons, Individually by means of transportation In the belt-shaped member suction holding device, a cup-shaped rubber suction pad is attached to one end opening of the suction passage and the belt-shaped member is sucked and held via the suction pad. By connecting one end to the central portion of the holding member, a suction hose connected to a negative pressure region formed between the two pistons, a switching valve interposed in the middle of the suction hose, This can be achieved by an adsorbing / holding device for a belt-shaped member constituted by a suction source connected to the other end of the suction hose .

In this invention, the storage space is partitioned into a sealed negative pressure region and a play region by two pistons stored in the storage space of the suction holding member, and a suction means is connected to the negative pressure region, When the position and width of the belt-like member changes, the piston is moved by the moving means corresponding to this, so that the position and length of the negative pressure region, that is, the position of the suction passage connected to the negative pressure region Since the number is changed, even if the position and width of the belt-like member are changed, it is possible to prevent the generation of an adsorption passage that sucks only air and does not perform the adsorption holding function. The configuration of two pistons relative to one suction holding member, it is only provided with moving means, small structure is simple, it is inexpensive, further, there is no need to sandwich the belt member, the belt-shaped member As a result, it is possible to prevent the occurrence of a flow of the rubber, and it is possible to securely hold the belt-shaped member even if it has a high bending rigidity, since it is not necessary to bend the belt-shaped member.

The position of the negative pressure region within the retract and space widths can be varied easily and freely, and La, reliably strip without deforming or damaging the rubber constituting the belt-shaped member Adsorption can be held.

It is a schematic side view which shows Embodiment 1 of this invention. It is a partially broken front view of an adsorption holding device. It is the partially broken top view.

Embodiment 1 of the present invention will be described below with reference to the drawings.
In FIG. 1, reference numeral 11 denotes a cylindrical forming drum that can be expanded and contracted as a rotating body, and this forming drum 11 can be rotated around a horizontal axis line by receiving a rotational driving force from a driving unit (not shown). . In this embodiment, the rotating body is composed of the molding drum 11 alone, but in the present invention, the rotating body may be composed of a molding drum and a tire constituent member attached to the molding drum, or You may comprise from the rigid core single-piece | unit whose outer surface is the same shape as the inner surface of a vulcanized pneumatic tire (product tire), or the tire structural member affixed around the rigid core.

  Reference numeral 14 denotes a horizontal transfer conveyor installed behind the forming drum 11. The transfer conveyor 14 extends in the front-rear direction. When the transport unit 14a located on the upper side of the transport conveyor 14 receives a driving force from a drive motor (not shown) and travels forward, the belt-like member 15 placed on the transport unit 14a and extending in the front-rear direction is It is conveyed toward the forming drum 11. Here, examples of the belt-like member 15 include an inner liner for a pneumatic tire, a carcass ply, a rubber chafer, a wire chafer, a side tread, a belt ply, and a top tread.

  Reference numeral 18 denotes a support beam extending in the horizontal front-rear direction with a front end portion positioned directly above the forming drum 11 and a rear end portion positioned immediately above the front end portion of the transport conveyor 14. 18 guide rails 19 extending in the longitudinal direction are laid. Reference numeral 20 denotes a moving base extending in the vertical direction to which a plurality of slide bearings 21 that are slidably engaged with the guide rail 19 are fixed. The moving base 20 receives a driving force from a driving mechanism (not shown). It can move in the front-rear direction while being guided by the guide rail 19. A guide rail 22 extending in the vertical direction is laid on the front surface of the movable table 20.

  Reference numeral 24 denotes an elevating table extending in the vertical direction to which a plurality of slide bearings 25 slidably engaged with the guide rail 22 are fixed. The elevating table 24 receives a driving force from a driving mechanism (not shown). While being guided by the guide rail 22, it can be moved up and down, that is, moved up and down. Here, as a driving mechanism for applying a driving force to the moving table 20 and the lifting table 24, for example, a screw mechanism, a rack and pinion mechanism, a fluid cylinder, a link mechanism, or the like can be used.

  26 is a suction holding device which is attached to the elevator 24 and can suck and hold the belt-like member 15, for example, the front end portion or the rear end portion thereof from above, and this suction holding device 26 stands by on the transport conveyor 14. After the belt-like member 15 (front end portion or rear end portion) is sucked and held, the lifting platform 24 is slightly raised, and then the moving platform 20 moves forward to the position directly above the forming drum 11, and then the lifting platform 24 Is lowered and the belt-like member 15 is pressed against the forming drum 11, the belt-like member 15 (front end portion or rear end portion) sucked and held by the suction holding device 26 is transported from the conveyor 14 to the molding drum 11, and the molding is performed. Delivered to drum 11. In the present invention, the belt-shaped member may be transported and transferred from one transport conveyor to another while the strip-shaped member is suction-held by the suction-holding device, and the transport source and transport destination of the strip-shaped member are particularly limited. There is no. In the present invention, a pair of the moving table 20, the lifting table 24, and the suction holding device 26 described above are installed at a distance substantially the same distance as the longitudinal length of the belt-like member 15, and the belt-like member is formed by the pair of suction holding devices 26. Before and after 15, both the rear end portions may be adsorbed and held to lift up the entire belt-shaped member 15, and then the belt-shaped member 15 may be conveyed toward the forming drum 11 and delivered.

  2 and 3, the suction holding device 26 has a horizontal suction holding member 30 that is fixed to the lower end of the lifting platform 24 and extends in the width direction of the belt-like member 15, and this suction holding member 30 includes the suction holding member 30. A square columnar cylinder body 31 extending in the longitudinal direction is provided. A storage space 32 having a circular cross section and extending in the longitudinal direction of the cylinder body 31 is formed inside the cylinder body 31, and the storage space 32 is open at both ends thereof. 33 and 34 are end bodies fixed to both ends in the longitudinal direction of the cylinder body 31, and the storage space 32 is closed by the end bodies 33 and 34. The cylinder body 31 and the end bodies 33 and 34 described above constitute the suction holding member 30 in which the storage space 32 is formed. In the present invention, the suction holding member 30 (cylinder body 31) may have a columnar shape, a hexagonal column shape, or the like, and the storage space formed inside the suction holding member 30 has an elliptical cross section. An ellipse and a polygon may be sufficient.

Reference numeral 38 denotes a plurality of suction passages formed in the lower wall 31a of the cylinder body 31, and one ends of these suction passages 38 open to the outer surface of the suction holding member 30 (lower wall 31a), here the lower surface, The other end communicates with the storage space 32. These adsorption passages 38 are installed along a straight line parallel to the longitudinal direction of the storage space 32 and are arranged at an equal distance from each other. A cup-shaped rubber suction pad 39 is attached to each suction passage 38. As a result, the belt-like member 15 is sucked and held by one end opening of the suction passage 38 through the suction pad 39. If the suction pads 39 are attached to the suction passages 38 in this way, the belt-like member 15 can be reliably sucked and held without damaging or deforming the rubber constituting the belt-like member 15 .

  41 and 42 are two pistons housed in the housing space 32 of the suction holding member 30 so as to be movable in the longitudinal direction (axial direction). The two pistons 41 and 42 allow the housing space 32 to be A sealed negative pressure region 43 formed between the pistons 41 and 42, formed between the piston 41 and the end body 33, and between the piston 42 and the end body 34, respectively, contributes to adsorbing and holding the belt-shaped member 15. It is divided into play areas 44 and 45 that do not. In addition, O-rings 46 and 47 are fitted on the outer circumferences of the pistons 41 and 42, respectively. As a result, the O-ring 46 and the piston 41, 42 and the suction holding member 30 (cylinder body 31) are connected to each other. The negative pressure region 43 is reliably sealed by being sealed by 47.

Reference numeral 50 denotes a suction hose connected to the negative pressure region 43 of the storage space 32 by connecting one end to the central portion of the cylinder body 31, and the other end of the suction hose 50 is connected to a blower 51 as a suction source. Has been. With the blower 51 which can thus generate a negative pressure more than 10kPa as a suction source, the one end opening of the suction passage 38 (adsorption pad 39) is covered about half the width direction end portion of the belt-shaped member 15 Even in such a case, since the degree of vacuum of the suction passage 38 is high, the end in the width direction of the belt-like member 15 can be securely sucked and held, so that the end in the width direction of the belt-like member 15 is removed from the suction holding. It is possible to prevent the situation of hanging down. In the present invention, a vacuum pump may be used as a suction source, or a suction fan may be used.

55 is a switching valve interposed in the middle of the suction hose 50. When the switching valve 55 is switched and the air in the negative pressure region 43 is sucked by the blower 51, the negative pressure region among all the adsorption passages 38. Only in the suction passage 38 communicating with 43 is negative pressure. At this time, if the belt-like member 15 having the same width as the negative pressure region 43 is located immediately below the suction holding member 30, the belt-like member member 15 is suction held from above over the entire width by negative pressure to one end opening of the suction passage 38 (adsorption pad 39).

  At this time, since the inside of the suction passage 38 communicating with the play areas 44 and 45 does not become negative pressure, the function of holding the belt-like member 15 by suction is not achieved. On the other hand, when the suction holding of the belt-like member 15 is suspended, the switching valve 55 is switched to stop the air suction in the negative pressure region 43 by the blower 51. The suction hose 50, the blower 51, and the switching valve 55 are connected to the negative pressure region 43 of the storage space 32 as a whole, and communicate with the negative pressure region 43 by sucking air in the negative pressure region 43. A suction means 56 that suctions and holds the belt-like member 15 by the suction passage 38 having a negative pressure inside the suction passage 38 is formed.

  60 and 61 are rods that are coaxial with the pistons 41 and 42 and project axially outward from the pistons 41 and 42, respectively.These rods 60 and 61 include the end bodies 33 and 34 and the end bodies 33, The guide blocks 62 and 63 are fixed to 34 respectively. 64 and 65 are support plates whose upper ends are fixed to the lifting platform 24 and whose inner ends are fixed to the end bodies 33 and 34, respectively, and extend parallel to the cylinder body 31, and these support plates 64 and 65 and the end bodies 33 and 34 Are connected to each other by reinforcing plates 66 and 67.

  70 is a ball screw rotatably supported by a bearing 71 and a bearing 72 whose both ends in the axial direction are fixed to the outer ends of the support plates 64 and 65, respectively. Are formed with male screw portions 70a and 70b inclined in the opposite directions. 73 and 74 are screw blocks respectively screwed into the male screw portions 70a and 70b of the ball screw 70, and the screw plates 73 and 74 and the outer ends of the rods 60 and 61 have a support plate 64, Both ends of connecting plates 75 and 76 that pass through 65 are connected.

  As a result, when the ball screw 70 rotates, the rod 60, the screw block 73, the connecting plate 75 and the rod 61, the screw block 74, and the connecting plate 76 move in the opposite direction by an equal distance in the longitudinal direction of the cylinder body 31, At this time, the pistons 41 and 42 move in the storage space 32 in the opposite direction by an equal distance in the axial direction, whereby the length of the negative pressure region 43 located between the pistons 41 and 42, that is, the inside is negative. The number of adsorption passages 38 that can become pressure changes. At this time, the suction passage 38 that can be a negative pressure is increased or decreased around the center in the longitudinal direction of the cylinder body 31.

Reference numeral 80 denotes one common drive motor as a drive source attached to the elevator 24, and an external gear 81 fixed to the output shaft of the drive motor 80 and an external fixed to the center of the ball screw 70. The gear 82 meshes with each other. As a result, when the drive motor 80 is operated, the ball screw 70 rotates around its own axis while being supported by the bearing 71 and the bearing 72. Aforementioned rods 60 and 61, ball screw 70, the screw blocks 73 and 74, the connecting plate 75, 76, drive motor 80, the entire outer gear 81 constitute the moving means 83. Incidentally, before Symbol moving means fluid cylinder may be configured link mechanism, the rack and pinion mechanism or the like.

Here, by storing two pistons 41, 42 in the storage space 32 as described above, a negative pressure region 43 is formed between the two pistons 41, 42, and the two pistons 41, 42 are formed. Can be moved by an equal distance in the opposite direction by a single shared drive motor 80 that constitutes a part of the moving means 83. Here , each piston is individually associated with two pistons. the two mobile unit 83 that moves is provided, so that move independently of each piston in the storage space by these moving means.

  In this way, in addition to the length of the negative pressure region (the number of suction passages to be negative pressure) as described above within the range of the storage space, in the longitudinal direction of the negative pressure region within the range of the storage space. The position (the position of the suction passage where negative pressure is generated) can be changed easily and freely, so that even if at least one of the position in the width direction of the belt-like member or the width of the belt-like member changes, this Can be easily and quickly dealt with. At this time, if one end side of the suction hose 50 is branched into a plurality, and one end of these branch portions is separated in the longitudinal direction of the cylinder body 31 and connected to each other, a band shape overlapping only the end portion of the storage space 32 Even the member 15 can be easily sucked and held.

Contact name if the receiving space 32 are two pistons 41 and 42 are accommodated as in the above embodiment may be omitted end member 33, 34 as a closing member, in this case, The play area is open to the outside. As described above, according to the present invention, two pistons are stored in the storage space, and at least one of the position and the length of the negative pressure region in the storage space is obtained simply by moving the piston in the longitudinal direction of the storage space by the moving means. One of them can be easily and reliably changed.

As described above, the storage space 32 is partitioned into the sealed negative pressure region 43 and the play regions 44 and 45 by the two pistons stored in the storage space 32 of the suction holding member 30, and the negative pressure When the suction means 56 is connected to the region 43 and the position and width of the belt-like member 15 change, the position and length of the negative pressure region 43, that is, the negative pressure region is moved by moving the piston corresponding thereto. Since the position and number of the suction passages 38 connected to 43 are changed, even if the position and width of the belt-like member 15 are changed, the suction passage 38 does not perform the function of sucking and holding only air. Can be prevented. Further, the two pistons against the one suction holding member 30, it is only provided with moving means 83, it is possible to reduce the size structure is simple, and inexpensive. Further, since it is not necessary to sandwich the belt-like member 15, it is possible to prevent a situation in which the rubber constituting the belt-like member 15 is caused to flow, and it is not necessary to bend the belt-like member 15 having high bending rigidity. Therefore, it is possible to reliably hold the suction.

Next, the operation of the first embodiment will be described.
Now, a belt-like member 15 as shown by a solid line in FIGS. 2 and 3 having a width substantially equal to the distance between the suction passages 38 located on the outermost both sides in the longitudinal direction has been conveyed to the front end of the conveyor 14 by the conveyor 14. Suppose. When the belt-like member 15 having such a width is transported from the transport conveyor 14 to the forming drum 11, first, the moving means 83 is operated to move the two pistons 41 and 42 in the opposite directions, here both axially outside. towards the distance between the front Symbol piston 41 moves until the substantially the same as the width of the belt-shaped member 15.

  As a result, a negative pressure region 43 having substantially the same length as the width of the belt-like member 15 is formed between the two pistons 41 and 42. At this time, the play areas 44 and 45 formed between the end body 33 and the piston 41 and between the end body 34 and the piston 42 are areas that do not contribute to the adsorption and holding of the belt-shaped member 15. Next, the drive mechanism is operated to move the moving table 20 in the front-rear direction, and the lifting table 24 is lowered to bring the suction holding member 30 closer to the front end of the belt-like member 15, so that the suction passage of the suction holding member 30 38 is brought into close contact with the front end portion of the belt-like member 15 via a suction pad 39. After that, when the switching valve 55 is switched and the air in the negative pressure region 43 is sucked by the blower 51, the suction passage 38, which is in communication with the negative pressure region 43 among all the suction passages 38, overlaps the belt-like member 15 here. Since all of the suction passages 38 in the position are negative, the front end portion of the belt-like member 15 is sucked from the upper side over the entire width by opening one end of the negative suction passage 38 (here, through the suction pad 39). Retained.

  In this state, the drive mechanism is operated, and the suction holding device 26 holding the front end of the belt-like member 15 is slightly raised. Thereafter, the moving base 20, the lifting base 24, the suction holding device 26 and the belt-like member 15 are moved forward toward the forming drum 11 by the drive mechanism. At this time, the transport unit 14a of the transport conveyor 14 is moved forward at the same speed as the forward movement speed of the suction holding device 26, thereby preventing the belt-like member 15 from being loosened or pulled in the longitudinal direction. Then, when the suction holding device 26 moves to a position directly above the top of the forming drum 11, the forward movement of the suction holding device 26 is stopped.

  Thereafter, the elevator 24 and the suction holding device 26 are integrally lowered by the drive mechanism, and the front end portion of the belt-like member 15 sucked and held by the suction holding device 26, specifically the suction passage 38 and the suction pad 39, is moved to the molding drum 11. While pressing against the top outer surface, the switching valve 55 is switched to stop the suction of air in the negative pressure region 43 by the blower 51. As a result, the front end portion of the belt-like member 15 is transported from the transport conveyor 14 to the forming drum 11 by the suction holding device 26 and transferred to the forming drum 11. Thereafter, the rear end portion of the belt-like member 15 is also transported to the forming drum 11 using the suction holding device 26 and transferred to the forming drum 11.

  Next, when the width of the belt-like member 15 to be transported changes, for example, as shown by the phantom line in FIG. 3, the two pistons 41 and 42 are correspondingly moved by the moving means 83. The inward movement is performed until the distance between 41 and 42 becomes substantially the same as the width of the belt-like member 15. As a result, a negative pressure region 43 having substantially the same length as the width of the belt-like member 15 is formed between the two pistons 41 and 42, and the number of suction passages 38 communicating with the negative pressure region 43 is reduced. Thereafter, the suction holding device 26 is moved to just above the front end of the belt-like member 15 in the same manner as described above, and the suction passage 38 is brought into close contact with the front end of the belt-like member 15 via the suction pad 39.

  Next, the switching valve 55 is switched and the air in the negative pressure region 43 is sucked by the blower 51. At this time, the length of the negative pressure region 43 is substantially the same as the width of the strip member 15, so the strip member Only the inside of the suction passage 38 (suction pad 39) at a position overlapping 15 is negatively pressured, and the front end portion of the belt-like member 15 is suction-held across the entire width by the suction-holding device 26. Thereafter, the suction holding device 26 holding the belt-like member 15 by suction is moved to the forming drum 11 as described above, and the front end portion of the belt-like member 15 is conveyed to the forming drum 11 and delivered. It should be noted that the rear end portion of the belt-like member 15 is similarly conveyed to the forming drum 11 and delivered.

  The present invention can be applied to the industrial field in which a belt-like member is held by suction.

15… Strip member 26… Suction holding device
30… Adsorption holding member 32… Storage space
38… Suction passage 39… Suction pad
41, 42 ... piston 43 ... negative pressure region
44 ... Play area 51 ... Blower
56… Suction means 80… Drive source
83 ... Movement means

Claims (1)

A plurality of suction passages, one end of which opens on the outer surface and the other end communicates with a storage space formed inside, are stored in the storage space, and a suction holding member provided in the longitudinal direction of the storage space. Two pistons that divide the storage space into a play area and a sealed negative pressure area; and a negative pressure area connected to the negative pressure area of the storage space and sucking air in the negative pressure area. A negative pressure in the storage space is obtained by moving the piston in the longitudinal direction of the storage space by sucking and holding the belt-shaped member by suctioning the negative pressure in the suction passage communicating with the region, and the negative pressure suction passage. Moving means for changing at least one of the position and the length of the pressure area, forming the negative pressure area between the two pistons, and individually moving the two pistons by the moving means on the other hand, In the suction holding device for a belt-like member, in which a cup-shaped rubber suction pad is attached to one end opening of the suction passage, and the belt-like member is sucked and held via the suction pad, the suction means is arranged at the center of the suction holding member. The suction hose connected to the negative pressure region formed between the two pistons, the switching valve interposed in the middle of the suction hose, An apparatus for adsorbing and holding a belt-like member, comprising a suction source connected to an end .

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