JP2016101715A - Bead wire releasing hook - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bead wire releasing hook for preventing the residue of rubber lump on a bead wire after the pull-out of the bead wire or for removing the left rubber.SOLUTION: In a bead wire extracting hook, a side face is retained at the toe of the bead of a rubber tire T supported at a predetermined position along a support frame 18, and a bead wire W is pulled and removed to the opposite side of the support frame 18 through a wire guide groove 19b on the side of the support frame 18. In order that the retaining pawl 3b of said hook 3 may not cut into a rubber at the extracting work time, a protrusion having an edge angle or a corner angle less than a right angle is formed not in the end face or the peripheral face of the tip of the retaining pawl 3b of the hook 3 but in an angle protruding said retaining pawl 3b in an extracting direction. The leading end face and peripheral face of the retaining pawl 3b and the boundary corner parts of the adjoining peripheries are chamfered, and these chamfers are formed in radial sections so that the leading end faces of the retaining pawl 3b are formed into spherical shapes.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a bead wire extraction hook for extracting a tire bead wire when a rubber tire for a vehicle such as an automobile is discarded.

Conventionally, in order to reuse the resources of waste tires for vehicles, a process of extracting a bead wire of a tire and separating it from rubber at the time of processing the tire is performed.
As tire processing devices for extracting the bead wires, the devices shown in Patent Documents 1 and 2 are already known.

  In these devices, a hook (locking claw) protrudes from the slit (wire guide groove) provided in the support frame to the tire side with respect to the support frame that supports the tire by pressing the side surface of the tire. A mechanism is provided that engages with a bead portion adjacent to the inner ring-shaped inner periphery and pulls out only the bead wire to the opposite side of the tire through the slit to separate and remove the bead wire from the tire.

Japanese Patent No. 4468348 Japanese Patent No. 4020906

  However, the hook for extracting the bead wire of the processing apparatus disclosed in the above-mentioned Patent Document 1 has a hooking claw at the tip of the hook for hooking the bead wire as shown in FIGS. A sharp edged blade-like edge is formed.

  For this reason, when the hook is locked to the bead portion of the tire supported by the support frame and the bead wire is pulled out to the opposite side of the support frame, the hook pawl is stuck into the bead portion of the rubber tire and the rubber of the bead portion is Is removed together with the bead wire while cutting the portion of the hook by the thickness of the hook.

  As a result, a lump of rubber cut by the thickness of the hook is left with the bead wire in the hook with which the bead wire is locked, and after the hook is moved forward and backward to remove the bead wire, The lump is left attached.

  However, if a lump of rubber remains firmly attached to the bead wire as described above, it will hinder the melting and recycling of the bead wire, so it is necessary to remove this, but the adhesion force of the rubber to the bead wire However, there is a problem that this removal requires a lot of labor.

  In addition, the plate-like hook shown in Patent Document 2 has a hook that is slightly rounded in a side view and is not formed at a sharp edge. The cross-sectional corners are formed at right angles.

  For this reason, when the tip of the hooking claw of the hook is locked to the tire bead portion and strongly pulled and pressed during the bead wire extraction operation, the right-angled corner of the locking claw cuts into the tire, and when the bead wire is extracted, As in the case of the latching claws of the patent document, there is a problem that a lump of rubber cut out in the hook remains in a state of embracing the bead wire, and much effort is required to remove the rubber.

  The present invention for solving the above-mentioned problem is as follows. First, the side surface of the rubber tire T is supported at a fixed position along the support frame 18, and the wire guide groove 19b on the support frame 18 side is locked. The bead wire extraction hook 3 is pulled out and removed to the opposite side of the support frame 18 via the support frame 18, and the hook 3 is engaged so that the locking claw of the hook 3 does not cut into the rubber during the extraction operation. The engaging claw 3b is formed in a mountain shape that protrudes in the pulling direction without forming a projection having an edge angle or a corner angle equal to or less than a right angle on the end surface and the peripheral surface of the front end portion of the pawl 3b. Yes.

  Secondly, it is characterized in that the front end surface and the peripheral surface of the locking claw 3b and the boundary corner portion between adjacent peripheral surfaces are chamfered.

  Third, the chamfering is formed in a rounded cross section, and the distal end surface of the locking claw 3b is formed in a spherical shape.

  Fourth, the boundary between the groove bottom surface of the hook groove 3c formed between the locking claw 3b and the hook body 3a and the side surface of the hook 3 is chamfered so as to form a rounded surface. It is said.

  Fifth, the groove bottom surface of the hook groove 3c is formed in a mountain shape with an arc-shaped cross section toward the open end side of the hook 3.

  According to the hook of the present invention configured as described above, when the hook is locked to the bead portion of the rubber tire and the bead is pulled out, the hook portion of the hook portion is not cut into the rubber tire. The bead wire is pulled out in a state of tearing together with the bead wire while being strongly pressed.

For this reason, it is difficult for rubber lumps to remain in the hook, or the remaining rubber is also strongly compressed when it is pulled out after being locked and deforms greatly, and after releasing the pressure, it is elastically restored and the adhesion to the internal bead wire is weakened. Thus, after the pulling operation, it can be dropped naturally or easily separated and removed manually, and there is an advantage that almost no labor is required for removing the rubber lump from the bead wire.
For this reason, there exists an effect that it can transfer to the melt processing operation of the bead wire which is the next process smoothly.

  As described above, when the hook is locked and the bead wire is pulled out, the rubber and the bead wire are separated by strong compression, deformation, and elastic restoration of the rubber. This can be realized by not cutting the rubber as much as possible and not cutting the rubber into a lump shape corresponding to the hook shape.

  For this reason, it is desirable that the tip of the hook claw be an arc shape (spherical surface) without an edge or a corner angle projection as much as possible, and the chamfering of the peripheral surface is also a round (arc shape) cross section. It is desirable to be.

1 is an overall front view of a tire processing apparatus using a hook of the present invention. It is a top view which similarly shows the hook use condition of a tire processing apparatus. It is a left view which shows the tire support part of a tire processing apparatus. It is an expanded front sectional view of a hook and tire support part equipped in a tire processing device. It is an enlarged plan view of the hook for bead extraction. It is VI-VI sectional drawing of FIG. 4 which shows the shape of the hook for beads. It is an expansion perspective view of the hook for bead extraction of the present invention.

  1 to 3 are a front view showing an example of the overall structure of a tire processing apparatus using a bead wire pulling hook of the present invention, a plan view showing an example of a bead wire pulling working unit, and a left side view of the apparatus. The basic mechanism of the device other than the shape of the hook pawl is the same as that of the device shown in Patent Document 1 described above.

  First, an outline of the configuration of a tire processing apparatus for extracting and removing a bead wire will be described. The processing apparatus includes a box-shaped body frame 1 that is long in the left-right direction, and a bed frame 2 in the left-right direction is provided in the center of the inside. A hook for extracting a bead wire, which will be described later, is provided on the left half of the bed frame 2. A guide bed 4 for linearly sliding the 3 in the left-right direction is installed. A tire support portion 5 that supports the tire T to be processed while adjusting the height is provided at the left end portion of the body frame 1.

  A horizontal ball screw shaft 6 whose front end (left end) is connected to the rear end (right end) of the hook 3 is movable left and right at the left half of the bed frame 2 so that the right end is axially moved by the carrier 7. It is supported movably.

  The ball screw shaft 6 is inserted in mesh with a ball nut 8 installed at an intermediate position on the bed frame 2, and the ball nut 8 is inserted through a motor 9 and a chain 11 installed on the body frame 1. The hook 3 is slid in the left-right direction on the guide head 4 and driven forward and backward by this rotation.

A large number of sensors (limit switches) S _{1 to} S ₇ are installed on the ball screw shaft 6 in the body frame 1, and the position of the sensor element 12 installed on the carrier 7 that moves left and right together with the ball screw shaft 6 is determined. By detecting it, the left-right movement and stop position of the hook 3 are controlled, and a bead wire extraction operation described later is performed. 13, according to the standard of the tire to be processed, control of the left and right movement and stop operation of the hook 3, and prior to this, control and setting of the lifting and lowering of the tire and the support position (height) in the tire support portion 5 described later. It is a control box that is installed on the body frame 1.

  The tire support portion 5 is installed in the vertical direction on the side of the body frame 1 and a support base 14 that supports the tire T that is loaded along the left end surface of the body frame 1 so that the center of the tire T is directly below the hook 3. A lift cylinder 16 that lifts and lowers the base 14 to securely engage the tire bead portion with the hook 3, and a lift guide 17 that guides the lifting and lowering of the support base 14 and the tire T.

  A plate-like support frame 18 is attached to the left end portion of the machine body frame 1 so that the upright surface faces the tire support portion 5 side. From the center of the support frame 18 is a vertical hook passage groove 19a through which the hook 3 is inserted, and a passage position inside the hook 3 when the hook 3 passes (drawing position of a bead wire W to be described later). A die plate 21 having a chevron-shaped guide groove 19b inclined in the downward direction toward both the front and rear sides is attached so as to fit. Reference numeral 22 denotes an operation panel attached to the left end side of the machine body frame 1 for performing a manual operation for performing tire processing by the processing device or a starting operation for automatic operation according to a preset program.

  In order to pull out the bead wire W of the tire T by the tire processing apparatus, first, the tire T carried into the tire support base 14 is protruded from the inside of the tire T toward the tire support portion 5 along the support frame 18. After raising and lowering to the height to be stopped (see FIGS. 1 and 2), the hook 3 is protruded from the support frame 18, and the tire T is moved to a height at which the bead portion b of the tire T can be locked to the hook 3. Can be lowered.

  Subsequently, the hook 3 is pulled and slid inside the support frame 18 to be engaged with the bead portion of the tire T, and the ball screw shaft 6 is operated in the backward direction to tear the hook 3 from the rubber of the bead portion. In this state, the bead wire W is locked, and the bead wire W is pulled out to the processing apparatus side while being guided by the guide groove 19b. The configuration of the tire processing apparatus and the bead wire drawing operation described above are the same as those in the above-mentioned Patent Document 1 and other known techniques.

  At the time of this drawing, the ball screw shaft 6 is rotated forward and backward appropriately to separate the bead wire W from the rubber in the tire T. According to the present invention, the bead wire W is pulled out together with the tire T in the hook 3. The removed rubber lump is also separated and removed, and even if the lump of rubber remains attached to the bead wire, it can be easily removed manually.

  The driving source of the hook according to the present invention is not limited to the one using the ball screw shaft as described above, but other than the one using a cylinder or other actuators, and the one in which the hook body also operates linearly, Patent Document 2 It may be of a rotational drive type as shown in FIG.

Next, the bead wire drawing hook of the present invention will be described in detail.
In this embodiment, the hook 3 of the present invention is produced by cutting a horizontally long plate-like member in the left-right direction as shown in FIGS. 4 to 7, and is engaged with the thick-walled (32 mm) main body 3a. The pawl 3b portion is formed thin (25 mm). The main body 3a and the locking claw 3b form a hook, and a hook groove 3c is formed between the two. The hook groove 3c is a recess that locks the bead wire W. In this example, the vertical width of the hook groove 3c is 20 mm, the depth is 125 mm, and the vertical width of the locking claw 3b is about 45 mm.

  Incidentally, these numerical values show the embodiment of the hook of the present invention, and do not limit the dimensions of the hook. Further, according to experiments by the inventors, when the plate thickness of the hook claw 3b is 32 mm as compared to 25 mm, the generation and suppression of rubber lumps after the bead wire is extracted are reduced. In terms of ease of separation from the later wire, it was found that the function was superior to that of 25 mm.

  A boss 3d is provided on both side surfaces of the thick right end, and a coupling 23 attached to the end of the ball screw shaft 6 is connected by a shaft 24 at the boss 3d.

  As shown in FIG. 6, the cross-sectional shape of the locking claw 3b is chamfered into a rounded (arc-shaped) cross section at its cross-sectional corner, and its tip is chevron-shaped or spherical in both the vertical and horizontal directions. It is formed in a shape. Furthermore, each cross-sectional end portion of the inner peripheral surface including the groove bottom of the hook groove 3c constituting the inner periphery of the hook 3 is also chamfered in a round shape as shown in FIG. 6, and the hook is the groove bottom surface and the upper surface of the hook main body portion 3a. The inner peripheral surface is also formed in an arcuate chevron cross section.

  FIG. 7 shows the shape of the outer periphery of the hooking claw 3b of the hook 3 and the inner peripheral surface of the hook groove 3c. When the hook 3 is locked in the bead portion of the rubber tire T and is strongly pulled by the surface of the hook 3 having such a rounded shape, the locking claw 3b can be stuck into the rubber of the tire, The rubber at the bead portion of the tire is strongly pressed without being cut into the tire.

  When the pressing force is further increased and the elastic limit of the rubber is exceeded, the rubber at that location is irregularly broken and cut into the bead wire W, and is then drawn out together with the bead wire W as a lump of rubber inside the support frame 18. When the bead wire W is pulled out to a predetermined length, the rubber screw lumps down naturally or can be easily removed manually by reversing the ball screw shaft 6 and pulling it back in the tire direction.

  At this time, since the groove bottom surface of the hook groove 3c is an arcuate chevron, the bead wire W is smoothly slipped against the hook 3, and the wire is prevented from being cut, and rubber is easily cut by the bead wire itself. There is an advantage that the rubber and the wire are separated more reliably.

  In this way, the rubber lump after the bead wire is pulled out can be easily removed because the hook 3 is engaged with the hook 3 at the tip and outer periphery of the hook 3 because there is no sharp edge or protruding corner. The rubber of the bead part is not easily cut or cut when pulled and stopped, and it is easily deformed by its elasticity after being subjected to strong pressure, making it easy to separate the bead wire from the rubber. It is to become.

  This action is not limited to the case where the tip of the locking claw 3b, the outer cross-sectional corner and the both end corners of the inner surface of the hook groove 3c have a strict round-shaped cross section. Even if there is, it works in the same way if it is chamfered at an obtuse angle.

DESCRIPTION OF SYMBOLS 1 Airframe frame 2 Bed frame 3 Hook 3a Hook main-body part 3b Locking claw 3c Hook groove | channel 3d Boss part 4 Guide head 5 Tire support part 6 Ball screw shaft 7 Carrier 8 Ball nut 9 Motor 16 Lift cylinder 17 Lifting guide 18 Support frame 19a Hook passage groove 19b Wire guide groove

Claims (5)

  The side surface of the rubber tire (T) supported at a fixed position along the support frame (18) is locked to the bead portion, and the support frame (18) is interposed via the wire guide groove (19b) on the support frame (18) side. ) On the opposite side of the bead wire (W) to remove the bead wire (W), the hook (3) so that the locking claw of the hook (3) does not cut into the rubber during the drawing operation. ) The engaging claw (3b) is formed in a mountain shape that protrudes in the pulling direction without forming protrusions having an edge angle or a corner angle less than a right angle on the end face and the peripheral surface of the engaging claw (3b). A bead wire extraction hook.   The bead wire extraction hook according to claim 1, wherein the tip end surface and the peripheral surface of the locking claw (3b) and the boundary corner portion between adjacent peripheral surfaces are chamfered.   The bead wire extraction hook according to claim 2, wherein the chamfer is formed in a round cross section, and the front end surface of the locking claw (3b) is formed in a spherical shape.   Chamfer so that the boundary between the groove bottom surface of the hook groove (3c) and the side surface of the hook (3) formed between the locking claw (3b) and the hook body (3a) forms a rounded surface. The bead wire extraction hook according to any one of claims 1 to 3.   The bead wire extraction hook according to claim 4, wherein the groove bottom surface of the hook groove (3c) is formed in a mountain shape having an arc-shaped cross section toward the open end side of the hook (3).

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