JPH06226860A - Method and apparatus for molding endless member - Google Patents

Abstract

PURPOSE:To inexpensively mold an endless member with high efficiency without requiring keeping space. CONSTITUTION:Since both side end parts of a striplike member 49 becoming a free state are allowed to approach each other to be bonded each other to mold an endless member, even when the striplike member 49 is largely shrunk during the period from cutting to bonding, this shrinkage is absorbed by both side end parts being in the free state and any correcting work becomes unnecessary. When the size of the endless member is altered, a measure is taken only by raising or lowering a support stand 50 and equipment cost becomes low and keeping space becomes unnecessary.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for forming an endless body by joining both ends in the longitudinal direction of a soft band-shaped member.

[0002]

2. Description of the Related Art Conventionally, an endless body such as a carcass band used for manufacturing a pneumatic tire is attached for one round while supplying a soft band-shaped member around a rotating cylindrical molding drum. After that, both ends of the strip-shaped member in the longitudinal direction are butt-joined by a joining means to be molded.

[0003]

However, in such a conventional method and apparatus for forming an endless body, the band-shaped member is made of a material having a large shrinkage ratio, for example, the band-shaped member includes a thick squeegee rubber. If it is, the length of the strip-shaped member is greatly shrunk between cutting and pasting and the length of the strip-shaped member deviates from one circumference of the forming drum. Therefore, the length of the strip-shaped member is formed at the end of the pasting. There is a problem that the manual work for matching the circumference of the drum is required, and as a result, the efficiency of the molding work becomes low. Further, when molding many endless bodies of different sizes, a molding drum is required for each size, which increases the equipment cost and also requires a space for storing various types of molding drums. However, in order to mold endless bodies of different sizes, it is necessary to replace the molding drum, which lowers the work efficiency.

An object of the present invention is to provide an endless body forming method and apparatus which are inexpensive and require no storage space, and which can form an endless body with high efficiency.

[0005]

[Means for Solving the Problems]
In addition, by vertically supporting the central portion in the longitudinal direction of the soft strip-shaped member from below substantially horizontally, the longitudinal side portions of the strip-shaped member are hung downward, and both longitudinal end portions of the strip-shaped member are lengthened. Secondly, by a method of forming an endless body by bringing the two end surfaces in the longitudinal direction closer to each other below the central portion in the direction and joining them to each other, the second direction is the longitudinal direction of the weak strip-shaped member. A support base that can support the central part from below and can move up and down in a substantially horizontal direction,
By rotatably connecting the base ends to both ends of the support base, it is possible to swing between a substantially horizontal horizontal position and a hanging position that extends substantially vertically downward from both ends of the support base. A pair of rocking bases for supporting both longitudinal side portions of the belt-shaped member whose both end portions in the longitudinal direction project from the distal end when in the position, and arranged immediately below the tip ends of the rocking bases in the hanging position. A pair of transfer means for transferring both longitudinal end portions of the belt-shaped member protruding from the tip of each rocking table so as to approach each other below the longitudinal central portion of the belt-shaped member, and the length of the belt-shaped member approaching each other. This can be achieved by a device for forming an endless body, which comprises a joining means for joining end faces on both sides in a direction by butt joining to form an endless body.

[0006]

Now, the pair of rocking bases are located in the horizontal position and support both longitudinal side portions of the belt-shaped member from below, and the supporting base between the rocking bases is the central portion in the longitudinal direction of the belt-shaped member. Is supported from below. At this time, both end portions in the longitudinal direction of the belt-shaped member project outward from the tip of the rocking base, respectively, but since the belt-shaped member is weak, the both end portions in the longitudinal direction projecting downward from the tip of the rocking base. It is hanging down. Next, both the rocking bases are rocked to the hanging position, so that both sides in the longitudinal direction of the belt-shaped member are drooped downward from both ends of the supporting base. Here, since the transfer means are respectively arranged just under the tips of the rocking bases in the hanging position, both end portions in the longitudinal direction of the belt-shaped member protruding from the tip of the rocking base are placed on these transfer means. To be done. Next, both transfer means are operated to transfer both longitudinal end portions of the strip-shaped member toward each other below the longitudinal center portion of the strip-shaped member. Next, the joining means is operated to butt-join the two longitudinal end faces of the strip-shaped members that are close to each other to form an endless body. In this way, since both end portions in the longitudinal direction of the strip-shaped member in the free state, specifically, both end portions in the longitudinal direction are brought close to each other and joined to form an endless body, the strip-shaped member is cut from the joining to the joining. Even if it contracts significantly, this contraction is absorbed by both ends in the longitudinal direction in the free state,
As a result, the endless body can be molded with high efficiency without any correction work. Moreover, when the size of the endless body is changed, it can be dealt with by simply moving the support base up and down and changing the distance from the support base to the transfer means. Therefore, one endless body of various sizes can be handled. It can be molded by the molding apparatus of No. 1, the facility cost can be reduced, and the storage space is not required.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1, 2, and 3, reference numeral 11 denotes a frame installed on a base 12, and a plurality of rails 13 extending in the vertical direction are laid on the frame 11. 14 is a rail
A plurality of slide bearings 15 slidably engaged with 13 are fixed to the elevating frame, and a lower part of a screw shaft 16 extending in the vertical direction is screwed into the elevating frame 14. The upper end of the screw shaft 16 is connected to a motor 17 fixed to the upper end of the frame 11, whereby when the motor 17 operates and the screw shaft 16 rotates, the elevating frame 14 is railed.
Ascend and descend while being guided by 13. Also, the frame 11
A disc brake 18 for locking the elevating frame 14 at a desired position is attached to this.

A pair of horizontal rotary shafts 22 and 23, which are spaced apart in the front-rear direction, are rotatably supported at the lower end of the elevating frame 14, and each of the rotary shafts 22 and 23 is provided with a plurality of shafts equidistant in the axial direction. Rollers 24 and 25 are fixed respectively. Further, the ring bodies 26 and
27 is rotatably supported, and each ring body 26 supported by the rotating shaft 22 has an arm 28 extending forward, and each ring body 27 supported by the rotating shaft 23 is facing backward. Each extending arm 29 is attached. Both ends of a beam 30 extending parallel to the rotation axis 22 are fixed to the arm 28, and a plurality of pairs of brackets 31 equidistant from each other in the longitudinal direction of the beam 30 are attached to the beam 30. The pair of brackets 31 rotatably supports two rollers 32 and 33, which are separated from each other in the front-rear direction. On the other hand, both ends of a beam 34 extending parallel to the rotation axis 23 are fixed to the arm 29, and the beam 34 is
A plurality of pairs of brackets 35 are attached equidistantly in the longitudinal direction of 34. And these paired brackets
Two rollers 36 and 37, which are separated from each other in the front-rear direction, are rotatably supported by 35. Reference numeral 38 denotes a support beam which is arranged between the rotary shafts 22 and 23 and whose both ends are fixed to the elevating frame 14 and is parallel to the rotary shaft 22. The front and rear surfaces of the support beam 38 are separated from each other in the longitudinal direction of the support beam 38. Plural pairs of brackets 39 and 40 are attached, and rollers 41 and 42 are rotatably supported on the brackets 39 and 40 forming a pair. 43 is a plurality of belts that extend in the front-rear direction and are stretched over the rollers 24, 25, 32, 33, 36, 37, 41, 42,
These belts 43 are arranged at equal distances in the axial direction of the rotary shaft 22. Reference numeral 44 denotes a roller fixed to one end of the rotary shaft 22, and a timing belt 47 is stretched between the roller 44 and a roller 46 attached to a motor 45 provided on the elevating frame 14. As a result, when the motor 45 operates and the rotary shaft 22 rotates, the belt 43 travels in the same direction at a constant speed. The above-mentioned rollers 24, 25, 41, 42 and the belt 43 between the rollers 24, 25 as a whole support a weak belt-shaped member 49, for example, a longitudinal center portion of a rubberized cord used for molding a pneumatic tire from below. And a substantially horizontal support base 50 that can be raised and lowered.

The ring bodies 26 and 27 and the arm 2 described above are also provided.
8, 29, beams 30, 34, brackets 31, 35, rollers 32, 3
Belt 43, roller 2 between 3, 36, 37 and rollers 24, 32
The belt 43 between 5 and 37 as a whole constitutes a pair of rocking bases 53 and 54 whose base ends are connected to both ends of the supporting base 50,
The rockers 53 and 54 are rockably supported by the support base 50 because the ring bodies 26 and 27 are rotatably supported by the rotary shafts 22 and 23 as described above. 55 is a motor attached to the lifting frame 14, and a rotary shaft 56 of the motor 55.
An external gear 57 is fixed to the tip of the. 58 is the external gear
The external gear 58 meshes with 57, and the external gear 58 is rotatably supported by the elevating frame 14. 59 and 60 are external gears fixed to the ring bodies 26 and 27, and these external gears 5
The external gears 58 and 57 mesh with the gears 9 and 60, respectively. As a result, the motor 55 operates to operate the external gears 57, 58,
When the rockers 59 and 60 rotate, the rocking bases 53 and 54 have a substantially horizontal position A (the position indicated by the solid line in FIG. 3) about the base end, and the rocking bases 53 and 54 move downward from both ends of the support base 50. It is possible to swing between a vertically hanging position B (the position shown in phantom in FIG. 3). And these rocking bases 5
When the belt-shaped member 49 is loaded onto the support base 50 and the rocking bases 53 and 54 when the members 3 and 54 are in the horizontal position A, the central portion of the belt-shaped member 49 in the longitudinal direction is the support base 50 as described above. Is supported from below by the rockers 53, 54 on both sides in the longitudinal direction.
Are respectively supported from below, and both end portions in the longitudinal direction thereof project from the tips of the rockers 53 and 54 and hang downward. An external gear 62 fixed to a transmission shaft 61 rotatably supported by the elevating frame 14 meshes with the external gear 60, and an arm 63 extending rearward is engaged with the transmission shaft 61.
Is attached. A rope is attached to the tip of this arm 63
64 are connected, and a balance weight 65 is attached to the lower end of the rope 64. The rotational moment applied to the external gear 60 by the balance weight 65 is opposite in direction and substantially equal in magnitude to the rotational moment applied to the external gear 60 by the rocking bases 53 and 54. As a result, the rocking bases 53 and 54 can be lightly rocked by a small force from the motor 55.

Reference numeral 69 is a supply means installed at the rear of the frame 11, and this supply means 69 has a post 70 standing upright on the base 12, and the upper end of this post 70 faces the frame 11. An extending swing frame 71 is rotatably supported. Reference numeral 72 denotes a cylinder whose head side is connected to the base 12, and the tip of a piston rod 73 of this cylinder 72 is connected to the swing frame 71. As a result, the cylinder
When 72 operates, the swing frame 71 swings around the rear end. At the front end of the swing frame 71 is a moving frame.
74 is supported so that it can move in the front-rear direction.
A plurality of belts 77 are stretched between two rollers 75 rotatably supported by 74 and a plurality of rollers 76 rotatably supported by the swing frame 71. And
These belts 77 are equidistant from each other in the axial direction of the rotating shaft 22 and are arranged alternately with the belts 43. Further, the tip ends of the pistons 80, 81 of cylinders 78, 79 extending in the front-rear direction are connected to the tip end of the moving frame 74 and the base end of the swing frame 71. As a result, when the cylinders 78 and 79 operate, the moving frame 74 and the rollers 75
Moves in the front-rear direction and approaches and separates from the swing base 54, so that the tip end portion of the belt 77 expands and contracts. Then, when the moving frame 74 comes closest to the swing base 54, the front end portion of the belt 77 enters between the rear end portions of the belt 43, and the belts 77, 43 are smoothly connected to each other. Reference numeral 82 denotes a motor installed on the base 12, and the rotational force of the motor 82 is transmitted to the belt 77 via the belt 83, whereby the belt 77 runs and the belt-shaped member 49 is supported from the supply means 69. It is carried into the table 50 and the rocking tables 53 and 54.

Reference numerals 85 and 86 denote moving bases arranged immediately below the tips of the rocking bases 53 and 54 at the hanging position B.
The rotations of the rollers 87 and 88 supported by the frame 11 are transmitted through a crank mechanism (not shown) so that the rollers 5 and 86 move in the front-rear direction by an equal distance and move away from each other. Then, the driving force from a motor 89 attached to the frame 11 is transmitted to the rollers 87 and 88 via a belt 90. Two rollers 91 and 92 are rotatably supported on the moving bases 85 and 86, respectively.
A plurality of belts 94 are stretched between the plurality of rollers 93 supported by the frame 11 and the plurality of rollers 93. On the other hand, the roller
A plurality of belts 96 are also stretched between 92 and a plurality of rollers 95 supported by the frame 11, and these belts 94, 96
Are alternately arranged at equal distances in the axial direction of the rotary shaft 22 and run by being driven by a motor (not shown). As a result, when the movable bases 85 and 86 approach and separate from each other, the front ends of the belts 94 and 96 expand and contract. Then, when the belts 94 and 96 both extend and move to a position right below the central portion of the support base 50, the front end portion of the belt 96 enters between the rear end portions of these belts 94. The moving table 85,
The 86, the rollers 87, 88, 91, 92, 93, 95, and the belts 94, 96 as a whole are arranged immediately below the tips of the rocking bases 53, 54 at the drooping position B, and the rocking at the drooping position B is performed. The strip-shaped members 49 projecting from the tips of the stands 53, 54 are attached to the strip-shaped members 49 at both longitudinal ends.
A pair of transfer means 97, 98 for moving the two so as to approach each other are formed below the central portion in the longitudinal direction of the. 100 is a belt
The upper joining claws installed between the 94 and 96 above the upper surfaces of the belts 94 and 96.
Are arranged side by side in the axial direction. A plurality of pairs of lower joining claws 101 are similarly installed below the upper joining claws 100. And these upper and lower joint claws 100, 1
When 01 is transferred by the transfer means 97, 98 until both end faces in the longitudinal direction of the strip-shaped member 49 come into contact with each other, 01 is lowered and raised, and these both end faces are butt-joined to each other. As described above, the upper and lower joining claws 100 and 101 collectively constitute joining means 102 for forming endless bodies by butting and joining both longitudinal end faces of the strip-shaped member 49 close to each other.

Next, the operation of the embodiment of the present invention will be described. Now, the pair of rocking bases 53 and 54 are located at the horizontal position A, the moving frame 74 of the supply means 69 comes closest to the rocking base 54, and the front end of the belt 77 enters between the rear ends of the belt 43. Suppose Next, the motor 82 is operated to drive the belt 77, the motor 45 is operated to drive the belt 43, and the belt-shaped member 49 is moved from the supply means 69 to the support base 50, the swing base 53,
Bring to 54. Then, both longitudinal end portions of the belt-shaped member 49 are supported from below by the rocking bases 53 and 54, and the longitudinal center portion of the belt-shaped member 49 is supported from below by the supporting base 50 between the rocking bases 53 and 54. Then, the running of the belts 77 and 43 is stopped. Next, the cylinders 78 and 79 are operated to move the moving frame 74 away from the rocking base 54, so that the belt 77
To be separated from between the belts 43. As a result, both longitudinal end portions of the belt-shaped member 49 project outward from the tip ends of the rocking bases 53 and 54, but at this time, since the belt-shaped member 49 is soft, both longitudinal end portions thereof rock. Stand 53, 54
Hang downward from the tip of.

Next, the motor 55 is operated to operate the external gears 57, 58,
Rotate 59 and 60 in synchronization. As a result, the arms 28, 29
Rotates downward by 90 degrees, and both rocking bases 53 and 54 are in the hanging position B.
Rock up to. As a result, the rocking bases 53, 54 are no longer supported on both sides of the strip-shaped member 49 in the longitudinal direction, and the strip-shaped member 49 is removed.
Is bent downward at both ends of the support base 50, and both sides in the longitudinal direction thereof hang downward from both ends of the support base 50. At this time, since the belts 94 and 96 of the transfer means 97 and 98 are arranged immediately below the tips of the rocking bases 53 and 54 at the hanging position B, respectively, the belt-like shapes protruding from the tips of the rocking bases 53 and 54 are formed. Member 49
Both side ends in the longitudinal direction are placed on these belts 94 and 96.

Next, the motor 89 is actuated to move the movable bases 85 and 86 closer to each other, and the belts 94 and 96 are extended until parts of them intrude into each other. Next, these belts 94 and 96 are run, and both longitudinal end portions of the belt-shaped member 49 located on the belts 94 and 96 are transferred so as to approach each other below the longitudinal central portion of the belt-shaped member 49. And these belts
The traveling of 94 and 96 is stopped when both end faces in the longitudinal direction of the belt-shaped member 49 come into contact with each other.

Next, the motor 89 is operated to separate the movable bases 85 and 86 from each other and form a space therebetween. At this time, since only the moving bases 85, 86 and the rollers 91, 92 move, the belts 94, 96 do not run, and as a result, the belt-shaped members 49 on the belts 94, 96 have both longitudinal end portions. Does not change position. Next, the upper joining claw 100 is moved down and the lower joining claw 101 is raised, and the upper and lower joining claws 100 and 101 are butt-joined to each other on both longitudinal end faces of the strip-shaped member 49 to form an endless body. Next, after raising and lowering the upper and lower joining claws 100 and 101, the endless body is taken out by a carrying-out means (not shown) and carried out to the next step. Next, the motor 55 is operated to return the rocking bases 53 and 54 to the horizontal position A, and the cylinders 78 and 79 are operated to operate the belt 77.
Intrude between the belts 43. The above is one cycle of the operation of the embodiment of the present invention, and thereafter, this cycle is repeated and endless bodies are successively molded.

Here, in this embodiment, both end portions in the longitudinal direction of the strip-shaped member 49 in the free state as described above, more specifically, both end portions in the longitudinal direction are brought close to each other to be joined together to form an endless body. Therefore, even if the strip-shaped member 49 largely contracts from the cutting to the joining, this contraction is absorbed by the both ends in the longitudinal direction which is the free state, and as a result, the contraction is increased without any correction work. The endless body can be molded with high efficiency.

When the size of the endless body is changed, the disc brake 18 is released and the motor 17 is operated to integrally move the elevating frame 14, the support base 50, and the rocking bases 53 and 54. By raising and lowering, the distance from the support base 50 to the upper surfaces of the belts 94 and 96 is changed according to the size. At this time, the cylinders 72, 78, 79 are operated to change the swing position of the swing frame 71 and the stretched state of the belt 77, and the relative position between the belt 77 and the belt 43 is maintained in the above-described state. Then, the disc brake 18 is operated to lock the elevating frame 14 at the position. When the size of the endless body is changed in this way, it can be dealt with simply by raising and lowering the support base 50, so that endless bodies of various sizes can be molded by one molding device. The equipment cost can be reduced and the storage space is not required.

[0018]

As described above, according to the present invention, an endless body can be molded with high efficiency while being inexpensive and requiring no storage space.

[Brief description of drawings]

FIG. 1 is a schematic front view showing an embodiment of the present invention.

FIG. 2 is a view as seen in the direction of arrows II in FIG.

FIG. 3 is a perspective view of the vicinity of a support base and a swing base.

[Explanation of symbols]

 49 ... Belt-shaped member 50 ... Support base 53, 54 ... Swing base 97, 98 ... Transfer means 102 ... Joining means A ... Horizontal position B ... Hanging position

Claims (2)

[Claims] 1. A step of suspending a longitudinal central portion of a weak strip-shaped member substantially horizontally from below so that both longitudinal side portions of the strip-shaped member hang downward, and both longitudinal end portions of the strip-shaped member. A step of bringing the parts closer to each other below the central part in the longitudinal direction and butt-joining the end faces in the longitudinal direction to form an endless body. 2. A support base capable of supporting a central portion in the longitudinal direction of a soft strip-shaped member from below and capable of moving up and down substantially horizontally.
By rotatably connecting the base ends to both ends of the support base, it is possible to swing between a substantially horizontal horizontal position and a hanging position that extends substantially vertically downward from both ends of the support base. A pair of rocking bases for supporting both longitudinal side portions of the belt-shaped member whose both end portions in the longitudinal direction project from the distal end when in the position, and arranged immediately below the tip ends of the rocking bases in the hanging position. A pair of transfer means for transferring both longitudinal end portions of the belt-shaped member protruding from the tip of each rocking table so as to approach each other below the longitudinal central portion of the belt-shaped member, and the length of the belt-shaped member approaching each other. And a joining means for joining end faces on both sides in a direction to form an endless body.