JP4252865B2 - Wire feeder - Google Patents

Description

  The present invention relates to an electric wire feeder that feeds an electric wire drawn out from an electric wire reel by bringing a planar peripheral circuit of an endless belt hung on a pulley into contact with an electric wire. It is suitable for use.

  2. Description of the Related Art An electric wire processing machine is known in which an electric wire drawn from an electric wire reel is measured and cut to a predetermined length, and a covering portion at the end of the electric wire is stripped to crimp a terminal. In this type of electric wire processing machine, an electric wire feeder for drawing out electric wires from an electric wire reel is provided. 2. Description of the Related Art Conventionally, an electric wire feeder has a pair of spaced apart guide nozzles positioned on the downstream side in the electric wire feed direction, and a feed roller that clamps the electric wire between the two guide nozzles. It was comprised so that an electric wire might be sent out to the supply direction downstream side.

  However, when the above-described wire feeding device rotates the pair of feed rollers and feeds the wire, there is a risk that the wire may be caught by a surrounding member or buckled during feeding. There was a risk of instability. This is even more pronounced due to the recent thinning of wires and weakening due to non-halogen specifications.

  Therefore, a belt feed mechanism has been proposed in which the feeding is stable and the physical influence on the electric wire is small. In this belt feed mechanism, for example, as shown in FIG. 14, drive rollers 1 and 3 are located on opposite sides of a support base (not shown), and a plurality of driven rollers 5a, 5b, 5c, 7a, 7b, 7c is rotatably supported and tension rollers 9 and 11 are mounted on the opposite side of each support base so as to be movable and adjustable.

  Then, delivery belts 13 and 15 made of a urethane belt or the like are wound around the upper and lower driving rollers 1 and 3, the driven rollers 5 a, 5 b, 5 c, 7 a, 7 b and 7 c, and the tension rollers 9 and 11, respectively, so that they can circulate freely. It is disguised. The tension rollers 9 and 11 appropriately apply tension to the delivery belts 13 and 15 by adjusting the positions.

  Further, each support base allows each of the delivery belts 13 and 15 to be brought into and out of operation by an expansion and contraction operation of an operation cylinder (not shown), and each of the delivery belts 13 between the driven rollers 5a, 5b, 5c, 7a, 7b, and 7c. 15, the electric wire 17 is configured to be releasably clamped from both upper and lower sides. In this sandwiched state, the feeding belts 13 and 15 are circulated in a predetermined direction so that the electric wires 17 are sequentially fed along the electric wire feeding direction P.

Japanese Patent Laying-Open No. 2002-8462 (FIG. 19)

However, the above-described conventional electric wire feeder is configured to hold the electric wire 17 between the delivery belts 13 and 15 by the expansion and contraction operation of the operation cylinder, and has a special configuration for the case where the electric wires having different wire diameters are held and fed. Even in the case of an electric wire feeder that can handle electric wires having different wire diameters, it has a mechanism that can move up and down under the urging force of the urging spring. For this reason, when the electric wires having different wire diameters are nipped and fed, the nipping force varies. That is, as shown in FIG. 15A, when a small-diameter electric wire 17a is held, the distance between the electric wire holding surfaces is as small as d. At this time, it is assumed that the small-diameter electric wire 17a receives P clamping force from the biasing spring. On the other hand, as shown in FIG. 15B, when the large-diameter electric wire 17b is clamped, the distance between the electric wire clamping surfaces is increased against the biasing force in the approaching direction of the biasing spring. Thus, the distance between the electric wire holding surfaces is increased to D. At this time, the urging force of the urging spring is increased by ΔP as the gap is expanded, and the large-diameter electric wire 17b receives the holding force of P + ΔP from the electric wire holding surface. As a result, in the case of a large-diameter electric wire, the pinching force is increased, and damage may occur.
The present invention has been made in view of the above situation, and even when an arbitrary wire is selected from a plurality of wires having different wire diameters, the holding force can be made constant, and the wire is damaged. An object of the present invention is to obtain an electric wire feeder capable of reducing the above.

In order to achieve the above object, an electric wire feeder according to claim 1 of the present invention is provided on each of a pair of blocks that can be freely moved and separated, and spans at least two pulleys provided on the blocks. A pair of endless belts for feeding the electric wire having a flattened electric wire holding surface in a part of the peripheral circuit, and holding the electric wires between the endless belts for feeding the electric wire by bringing the pair of block bodies close to each other An electric wire feeding device used for continuous conveyance of a plurality of types of electric wires having different diameters by applying an electric wire clamping force while holding an electric wire between surfaces and rotating the electric wire feeding endless belt to feed out the electric wire. A force is generated in a direction against the urging force of the urging means and the urging means, and the wire clamping force corresponding to a plurality of types of electric wires having different diameters by the pair of block bodies is made constant. A clamping force control means including a body pressure cylinder, and the wire diameter detecting unit for detecting the wire diameter of the wire to be delivery target, based on the wire diameter, air pressure correlation table stored in advance in the storage means, the detected line A pneumatic pressure setting unit that sets an air pressure of the fluid pressure cylinder corresponding to a diameter, and a control unit that sends wire diameter data of the wire to be sent out to the pneumatic pressure setting unit. .

  In this electric wire feeder, even when an arbitrary wire of a plurality of different wire diameters is selected and clamped, the clamping force control means operates for each wire diameter of the wire to be fed, Force is constant. Thereby, irrespective of the wire diameter, the clamping force is constant, and damage to the wire is reduced.

  The wire feeding device according to claim 2, wherein an urging means for applying the electric wire clamping force is stretched between the pair of block bodies, and the clamping force control means resists the urging force of the urging means. It is a fluid pressure cylinder that is driven to extend.

  In this electric wire feeder, for example, when a small-diameter electric wire is held, the interval between the electric wire holding surfaces is small. At this time, the small-diameter electric wire is assumed to receive a pinching force of P from the urging means. On the other hand, when a large-diameter electric wire is clamped, the distance between the electric wire clamping surfaces is increased against the biasing force in the approaching direction of the biasing means, and the gap between the electric wire clamping surfaces is increased. Become. At this time, the energizing force of the energizing means is increased by ΔP as the gap is expanded, and the large-diameter electric wire receives a holding force of P + ΔP from the electric wire holding surface. At this time, a ΔP pushing force is applied to the wire clamping surface by the fluid pressure cylinder, and eventually the reaction force that the large-diameter wire receives from the wire clamping surface becomes P. Therefore, the increased clamping force ΔP that acts in the case of a large-diameter wire is canceled out. Thereby, regardless of the wire diameter, the clamping force is constant, and damage to the wire is reduced.

According to the electric wire feeder according to the present invention, the electric wires are clamped by the electric wire clamping surfaces of the electric wire feeding endless belts by bringing the pair of block bodies close to each other, and the electric wire feeding devices are rotated by rotating the electric wire feeding endless belts. In the wire feeding device used for continuous conveyance of a plurality of types of electric wires having different diameters , an urging means for applying an electric wire clamping force, and generating a force in a direction against the urging force of the urging means, A clamping force control means composed of a fluid pressure cylinder that makes the wire clamping force corresponding to a plurality of types of wires having different diameters by a pair of block bodies, and a wire diameter detection unit that detects the wire diameter of the wire to be sent out, , based on the wire diameter, air pressure correlation table that has been previously allowed stored in the storage means, comprising a pneumatic setting unit for setting the pressure of the fluid pressure cylinder corresponding to the detected wire diameter, and the delivery target electrostatic Since the wire diameter data and a control means for sending to the pneumatic setting unit, even when the clamping by selecting ones from the wire a plurality of different wire diameters of arbitrary constant clamping force It is possible to reduce the damage to the electric wire.

Hereinafter, preferred embodiments of an electric wire feeder according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a front view of an electric wire processing machine provided with an electric wire feeder according to the present invention, FIG. 2 is a side view of a standard electric wire processing machine and an electric wire reel storage shelf, and FIG. 3 is an electric wire transfer provided in the electric wire processing machine. FIG. 4 is an explanatory diagram showing the front view of the hand in (a) and the side view in (b). FIG. 4 shows the terminals with electric wires held in the clamp cage (a), with terminals arranged in the order of attachment to a predetermined connector. FIG. 5 is a side view showing the wire feeding device of the standard wire processing machine, FIG. 6 is a plan view of the wire feeding device, and FIG. 7 is an enlarged view of the wire feeding device. FIG. 8 is an explanatory view schematically showing the positional relationship between the electric wire and the electric wire feeder in the electric wire support base, FIG. 9 is a rear view of FIG. 7, and FIG. 10 is a side view of the block body of the electric wire feeder. FIG. 11 is an operation explanatory view of the wire cutting means provided in the wire feeder.

  In the present embodiment, the case where the wire feeder 100 is provided in the fixed wire machine 300 of the wire machine 200 will be described as an example. Prior to the description of the wire feeder 100, an outline of the wire processing machine 200 will be described. The electric wire processing machine 200 is for manufacturing a wire harness configured by mixing various electric wires, and is formed by connecting the following processing machines. That is, the electric wire processing machine 200 is configured by arranging a fixed-length electric wire processing machine 300, a crimping machine 400, and a terminal-attached electric wire transfer machine 500 in a horizontal row. A wire feeder 600 shown in FIG. 2 is provided behind the fixed wire processing machine 300, a connecting machine (not shown) is provided at the rear of the transfer machine 500, and a housing mounting machine (not shown) is provided behind the connecting machine. A housing feeder (not shown) and a harness molding machine (not shown) are arranged on both the left and right sides, respectively.

  In the fixed wire processing machine 300, in order to produce a terminal-attached electric wire that constitutes a wire harness, the length is measured while a long electric wire is pulled out and cut into a predetermined length. In the electric wire feeder 600, a large number of electric wire reels 21 having different electric wire diameters and coating colors are dispersedly arranged in a plurality of electric wire storage shelves 23. The electric wires 25 are electric wires provided with guides 27 corresponding to the electric wires 25. It is supplied from the pre-feeder 29 to the wire feeder 100.

  Each electric wire 25 cut to a predetermined length by the fixed wire processing machine 300 is held and fixed at a predetermined pitch at both ends by a first electric wire conveying device (not shown) provided on the gantry 31, and is U-shaped. Are intermittently transferred in a bent state and reach the next caulking machine 400.

  In the crimping machine 400, all processes from trimming of the terminal portion of each electric wire 25 to terminal crimping are performed. The caulking machine 400 is provided with a second electric wire conveying device (not shown), and the group of electric wires 25 intermittently fed by the first electric wire conveying device is sequentially transferred to the second electric wire conveying device by the electric wire transfer hand 37 shown in FIG. It is transferred to. In the electric wire transfer hand 37, two pairs of claws 37a and 37a for holding the electric wire 25 are formed with a predetermined gap d therebetween. As for the electric wire 25 pinched by the electric wire transfer hand 37, this gap | interval d part is pinched | interposed into an electric wire clip. At this time, the electric wire 25 group is held at the same arrangement pitch as before. In the crimping machine 400, a trimming device 41, a peeling device 43 and an image sensor 45 are arranged in accordance with the arrangement pitch of the electric wires 25, and a plurality of terminal crimping machines 47a for crimping terminals of different product numbers, 47b, 47c, 47d, 47e, 47f, 47g, and 47h (hereinafter also collectively referred to as 47) are arranged in parallel.

  In the trimming device 41, the terminal of the electric wire 25 is trimmed, and the length from an electric wire clip (not shown) for temporarily holding the electric wire 25 becomes constant. Then, after stripping (striping) the end of the electric wire in the peeling device 43 and confirming the strip state of the electric wire 25 (the length of the exposed conductor, etc.) by the image sensor 45, a predetermined terminal crimping machine A terminal 49 (see FIG. 4) of a desired size is crimped by 47.

  The first and second electric wire conveyance devices have the same structure, and a plurality of electric wire clips are arranged in parallel at a predetermined pitch on an endless timing belt (not shown). The electric wire clip has a pair of clamps formed with an insertion guide slope on the upper end, and is urged in the closing direction by a spring.

  In the transfer machine 500, the reversing transfer hand 51 which can rotate and the necessary reversal of the terminals 49, the arrangement of the electric wire 25 group on the timing belt is changed and transferred to the electric wire clamp 53 shown in FIG. And stock.

  The electric wire clamp rod 53 is formed by arranging an electric wire clip 57 including a pair of sandwiching elements 57a and 57a in parallel with the long support rod 55 in the same manner as the electric wire clip. FIG. 4B shows a case where the group of electric wires 25 is reversed and locked to one electric wire clamp 53 including rearrangement. As is clear from the comparison with FIG. 4A, the ends of each electric wire 25 are grouped into several groups corresponding to the connectors 59, 61, 63 to be mounted, and the actual wire harness is arranged. It is close.

  As shown in FIG. 5, the wire feeder 100 according to the present invention is provided in the fixed wire processing machine 300 of the wire processing machine 200 configured as described above. The wire feeder 100 draws a desired wire 25 from a plurality of wire reels 21 around which different types of wires 25 are wound, and cuts the wire 25 with a predetermined length, thereby processing the drawn wire 25 into a standard.

  The electric wire feeder 100 includes, as main components, an electric wire support 71 shown in FIG. 6, a moving base 73, a pair of electric wire feeders 75 and 75 shown in FIG. 8, and an electric wire cutting means 77 shown in FIG. Prepare. The electric wire support 71 holds a plurality of electric wires 25 drawn from the electric wire reels 21 in parallel at predetermined intervals. As shown in FIG. 6, a plurality of parallel support bars 79a, 79b, 79c, 79d, which are orthogonal to the direction of the electric wires, are arranged in parallel on the wire support base 71, and the support bars 79a, 79b, 79c, 79d have axes. A plurality of wire nozzles 81a, 81b, 81c, 81d in the same direction as the wire 25 are arranged in parallel. Each electric wire 25 is inserted and held in a corresponding electric wire nozzle 81a, 81b, 81c, 81d.

  In the present embodiment, four support bars 79a, 79b, 79c, 79d are juxtaposed, and electric wire nozzles 81a, 81b, 81c, 81d are fixed to the respective support bars 79a, 79b, 79c, 79d. Accordingly, one electric wire 25 is held by the electric wire support base 71 through the four electric wire nozzles 81a, 81b, 81c, 81d. Thus, the electric wire 25 drawn out from the electric wire reel 21 is held by the electric wire nozzles 81a, 81b, 81c, 81d of the electric wire support base 71, so that the holding position of the electric wire support base 71 with respect to the electric wire reel 21 becomes constant. And as shown in FIG. 2, slack becomes difficult to produce between the electric wire reel 21 and the electric wire support stand 71. FIG. Accordingly, the drawing load at the time of drawing the electric wire by the electric wire feeding means described later is stabilized, and the accuracy of the electric wire feeding amount is increased.

  The moving base 73 is configured to reciprocate in the orthogonal direction with respect to the electric wire 25 held by the electric wire support base 71. That is, the moving table 73 reciprocates on the same plane. In this way, the moving base 73 moves on the same plane, so that the moving mechanism becomes simpler and the selective feeding operation of the electric wire 25 is fast and reliable as compared with the case where the moving base 73 is moved up and down, left and right, for example. Become.

  As shown in FIG. 7, the moving table 73 is supported so as to be able to reciprocate via a linear guide 83 provided on the gantry 31. The moving table 73 is provided with a drive source for reciprocating movement outside the moving table 73. The drive source provided outside is connected to the moving table 73 through power transmission means. In the present embodiment, as shown in FIG. 1, an electric motor 85 as a drive source is fixed to the mount 31, and the drive shaft of the electric motor 85 is connected to a drive shaft 87 which is a power transmission means via a speed reducer or the like. It is connected. A screw is formed on the drive shaft 87, and this screw is screwed into a screwing means (nut or the like) 89 fixed to the moving table 73.

  Therefore, when the drive shaft 87 is rotated forward and backward by forward and reverse rotation of the electric motor 85, the moving base 73 is reciprocated through the screwing means 89 screwed to the drive shaft 87. As described above, since the drive source is provided outside the moving table, the moving table 73 can be reduced in weight and the inertial force can be reduced. Therefore, the driving source and the linear moving mechanism can be reduced in size. It becomes possible. In addition, as a drive mechanism provided outside for moving the moving base 73, a linear drive mechanism having a ball screw, a linear drive mechanism using a belt or a chain, a linear motor, or the like can be used.

  The moving table 73 is provided with a pair of wire feeding means 75 and 75 shown in FIG. The wire feeding means 75 and 75 are arranged at a predetermined interval in the vertical direction, while holding the arbitrary one electric wire 25 by moving close to each other and rotating synchronously to draw out the electric wire 25 (see FIG. 5 in the left-right direction).

  As shown in FIG. 8, the pair of wire feeding means 75 and 75 is disposed between the wire nozzles 81a and 81b. By arranging the wire feeding means 75, 75 between the pair of wire nozzles 81a, 81b, it becomes possible to always hold the straight wire 25 without slack, and the amount of feeding by the wire feeding means 75, 75 can be reduced. The accuracy is increasing.

  In the present embodiment, as shown in FIG. 9, the electric wire feeding means 75, 75 includes a pair of block bodies 91, 93 that are provided on the moving base 73 and that are separated from each other with the electric wire 25 interposed therebetween, and the block bodies 91, 93. And an endless belt 101 for feeding an electric wire stretched around a plurality of pulleys 97 and 99 including a drive pulley 95. The wire feeding endless belt 101 forms a triangular peripheral circuit by the drive pulley 95 and the pulleys 97 and 99.

  In the endless belt 101 for electric wire feeding, a planar peripheral circuit stretched between at least a pair of pulleys 95 and 97 serves as an electric wire clamping surface 101a. Therefore, the electric wire 25 is clamped by the pair of electric wire clamping surfaces 101a and 101a, and the electric wire feeding endless belts 101 are synchronously rotated in the opposite directions, so that the electric wires 25 are fed in the drawing direction. Thereby, compared with the case where a pair of clamping rollers etc. are used, for example, a large contact area with the electric wire 25 can be ensured, slipping is less likely to occur, and the accuracy of the feed amount is increased.

  The pair of block bodies 91 and 93 includes a link mechanism 105 configured to have a tension spring 103 shown in FIG. The pair of block bodies 91 and 93 are urged in the approaching direction by the link mechanism 105. The pair of block bodies 91 and 93 is provided with an air cylinder 105 shown in FIG. 7 that separates the block bodies 91 and 93 in the separating direction. Accordingly, the pair of block bodies 91 and 93 can be held in a separated state so that the electric wire 25 can be inserted against the urging force of the link mechanism 105.

  The length measuring rollers 107 and 107 shown in FIG. 10 are provided in the respective block bodies 91 and 93, and the length measuring rollers 107 and 107 move the block bodies 91 and 93 closer to each other so that the electric wire 25 is sandwiched between them. It is designed to rotate in synchronization with the feed. As a result, the length of the wire 25 that is nipped by the endless belts 101 and 101 and fed out is measured by the length measuring rollers 107 and 107.

  Further, as shown in FIG. 10, a plurality of guide roller groups 109 and 111 are provided on the rear end block bodies 91 and 93 of the block bodies 91 and 93, and the guide roller groups 109 and 111 are the length measuring rollers 107 and 107, respectively. It is possible to straighten the electric wire 25 introduced into the straight line.

  Driving force is input to the driving pulley 95 of the wire feeding means 75 and 75 by coaxial input side pulleys 113 and 113 shown in FIG. 7 provided on the surface opposite to the endless belt 101 for feeding the wire. The moving table 73 is provided with a pair of fixed pulleys 115, 115 positioned outside the block bodies 91, 93 in the direction of separation. In addition, the block bodies 91 and 93 are provided with a pair of pulleys 121 and 121 and a pair of pulleys 123 and 123 that are arranged on a virtual line in the approaching / separating direction. In the figure, reference numeral 125 denotes a path change pulley.

  A drive endless belt 127 is stretched around the coaxial input side pulleys 113 and 113, the fixed pulleys 115 and 115, the pulleys 121 and 121, the pulleys 123 and 123, and the path changing pulley 125. One of the pair of fixed pulleys 115 and 115 is connected to an output shaft of a drive source (not shown).

  Here, the driving endless belt 127 is stretched between a pair of block bodies 91 and 93 in a part of its peripheral circuit, and the first belt path in the direction along the approaching / separating direction of the block bodies 91 and 93. 131 and a pair of second belt paths 133 and 135 that are stretched between the respective block bodies 91 and 93 and the pair of fixed pulleys 115 and 115 in a direction along the approaching / separating direction of the block bodies 91 and 93. is doing.

  In the block bodies 91 and 93 in which the driving endless belt 127 is stretched, when the pair of block bodies 91 and 93 are moved away from each other, the first belt path 131 across the pair of block bodies 91 and 93 Length increases. Moreover, a pair of block bodies 91 and 93 will approach the outer fixed pulleys 115 and 115 by separating. Accordingly, the lengths of the second belt paths 133 and 135 extending between the respective block bodies 91 and 93 and the fixed pulleys 115 and 115 are reduced by the same amount.

  In other words, the circumferential circuit length of the driving endless belt 127 does not change even when the block bodies 91 and 93 approach and leave, and the tension does not vary. Thereby, even when the block bodies 91 and 93 move, load fluctuation due to tension fluctuation does not occur in the moving mechanism (link mechanism 105, air cylinder 105) of the block bodies 91 and 93.

  The moving table 73 is provided with a wire cutting means 77 in front of the wire feeding means 75, 75. The electric wire cutting means 77 has a base portion 77a through which the electric wire 25 is inserted, and an opening / closing portion 77c fixed to the base portion 77a through a hinge 77b. The base 77a and the opening / closing part 77c are provided with a clamp 77d and a cutter 77e. The electric wire 25 sandwiched between the clamps 77d is sent out by forming the loop portion 25a by being led out from the base portion 77a by the electric wire feeding means 75 and 75 when the opening / closing portion 77c is opened. The fed electric wire 25 is held by both ends of the loop portion 25a by the electric wire transfer hand 37 and cut by the cutter 77e, and at the same time the clamp is released and transferred. The electric wire cutting means 77 to which the electric wire 25 has been transferred closes the opening / closing portion 77c, holds the tip of the electric wire 25 fed for a predetermined length by the clamp 77d, and repeats the same operation as described above.

  In the electric wire feeder 100, after moving the moving base 73 to the position of the electric wire 25, the electric wire 25 is synchronously rotated while being sandwiched between the pair of electric wire feeding means 75 and 75, so that a desired electric wire 25 can be selected from a plurality of different electric wires 25. Only the electric wire 25 can be sent out. Therefore, it is possible to selectively feed and cut an arbitrary electric wire 25 without relatively moving the electric wire reel 21 and the electric wire support base 71. For example, even an electric wire that is relatively resistant to rubbing such as a non-halogen specification is damaged. Without making it possible, high-speed selection and delivery are possible.

FIG. 12 is a block diagram of a configuration for controlling the clamping force, and FIG. 13 is an enlarged cross-sectional view of a main part of an endless belt for feeding electric wires in which a large-diameter electric wire is clamped.
The wire feeder 100 includes a clamping force control unit that varies the wire clamping force of the pair of block bodies 91 and 93 according to the outer diameter of the wire 25. In the present embodiment, the air cylinder 105, which is a fluid pressure cylinder, is used as the clamping force control means. The air cylinder 105 applies an extension force in a direction against the urging force of the tension spring 103 to the pair of block bodies 91 and 93 on which the tension spring 103 that is an urging means for applying an electric wire clamping force is stretched. To be driven.

  The air cylinder 105 is driven to extend by flowing high-pressure air 143 from the air supply means 141 shown in FIG. An air pressure control unit 145 is interposed in the air supply path between the air supply unit 141 and the air cylinder 105. The air pressure control unit 145 can supply the air cylinder 105 with the clamping force control air 149 in which the high pressure air 143 from the air supply unit 141 is adjusted to a predetermined pressure.

  The pneumatic control means 145 is controlled by a control means (CPU or the like) 151 provided in the wire feeder 100. The control unit 151 includes a wire diameter detection unit 153, an air pressure setting unit 155, and an air pressure signal sending unit 157. The control means 151 detects the wire diameter of the electric wire 25 to be sent out from the electric wire processing data or the like by the electric wire diameter detection unit 153. If the wire diameter is detected, the control unit 151 sends the wire diameter data 159 to the pneumatic pressure setting unit 155. The air pressure setting unit 155 sets an air pressure corresponding to the detected wire diameter based on a wire diameter / air pressure correlation table stored in advance in a storage unit (not shown). The control unit 151 sends the set air pressure data 161 to the air pressure signal sending unit 157. As a result, the control means 151 can send the air pressure signal 163 from the air pressure signal sending section 157 to the air pressure control means 145 and supply the clamping force control air 149 to the air cylinder 105.

  In such a configuration, for example, as shown in FIG. 15A, when a small-diameter electric wire 17a is held, the distance between the electric wire holding surfaces is as small as d. At this time, it is assumed that the small-diameter electric wire 17a receives P clamping force from the urging means. On the other hand, in the wire feeder 100 according to the present embodiment, as shown in FIG. 13, when the large-diameter electric wire 25b is held, the electric wire holding surface 101a resists the biasing force in the approaching direction of the tension spring 103. , 101a, and the distance D between the wire holding surfaces 101a, 101a is increased to D. At this time, the biasing force of the tension spring 103 is increased by ΔP as the gap is expanded, and the large-diameter electric wire 25b receives the holding force of P + ΔP from the electric wire holding surfaces 101a and 101a. At this time, the air cylinder 105 applies a pushing force of ΔP to the electric wire clamping surfaces 101a and 101a, and eventually the reaction force that the large-diameter electric wire 25b receives from the electric wire clamping surfaces 101a and 101a becomes P. That is, the increased clamping force ΔP that has been acting in the case of the large-diameter electric wire 25b is canceled out.

  Therefore, according to this electric wire feeder 100, even if it is a case where arbitrary things are selected and clamped from the electric wire 25 of a several different wire diameter, it is an air cylinder for every wire diameter of the electric wire 25 used as the object of sending out. 105 operates and the clamping force becomes constant. Thereby, irrespective of the wire diameter, the clamping force is constant, and damage to the wire 25 can be reduced.

It is a front view of an electric wire processing machine provided with an electric wire feeder concerning the present invention. It is a side view of a fixed-size electric wire processing machine and an electric wire reel accommodation shelf. It is explanatory drawing which represented the front view of the electric wire transfer hand with which an electric wire processing machine is equipped to (a), and represented the side view to (b). It is explanatory drawing of the electric wire mounting | wearing operation | movement which represented the electric wire with a terminal hold | maintained at the clamp cage | basket to (a) and the electric wire with a terminal rearranged in order of the attachment to a predetermined connector to (b). It is a side view showing the wire feeder of a fixed wire processing machine. It is a top view of an electric wire feeder. It is an enlarged side view of an electric wire feeder. It is explanatory drawing which represented typically the positional relationship of the electric wire and electric wire feeder in an electric wire support stand. FIG. 8 is a rear view of FIG. 7. It is a side view of the block body of an electric wire feeder. It is operation | movement explanatory drawing of the electric wire cutting means with which an electric wire feeder is equipped. It is a block diagram of the composition for controlling pinching force. It is a principal part expanded sectional view of the endless belt for electric wire feeding which clamped the large diameter electric wire. It is a principal part block diagram of the conventional electric wire feeder. It is a principal part expanded sectional view of the endless belt for electric wire feeding which represented the clamping condition of a small diameter electric wire and a large diameter electric wire by (a) (b).

Explanation of symbols

25 Electric wire 91, 93 Block body 95, 97 Pulley 100 Electric wire feeder 101 Electric wire feeding endless belt 101a, 101a Electric wire clamping surface 103 Tension spring (biasing means)
105 Air cylinder (clamping force control means)

Claims (2)

A pair of electric wire feeders having a flat electric wire clamping surface as a part of a peripheral circuit, which is provided on each of a pair of block bodies that can be moved toward and away from each other and spanned by at least two pulleys provided on the block bodies. Equipped with an endless belt,
A plurality of types having different diameters are provided by holding the electric wire between the endless belts for feeding the electric wire by bringing the pair of block bodies closer to each other and holding the electric wire by rotating the endless belt for feeding the electric wire. An electric wire feeding device used for continuous conveyance of electric wires,
A biasing means for applying a wire clamping force;
Holding force control comprising a fluid pressure cylinder that generates a force in a direction against the urging force of the urging means and makes the wire clamping force corresponding to a plurality of types of wires having different diameters by the pair of block bodies constant. Means,
A wire diameter detector that detects the wire diameter of the wire to be delivered;
An air pressure setting unit for setting the air pressure of the fluid pressure cylinder corresponding to the detected wire diameter based on the wire diameter / air pressure correlation table stored in advance in the storage means ;
Control means for sending wire diameter data of the wire to be sent out to the pneumatic pressure setting unit;
An electric wire feeder characterized by comprising: A biasing means for applying the wire clamping force is stretched between the pair of block bodies,
2. The wire feeder according to claim 1, wherein the clamping force control means is a fluid pressure cylinder that is driven to extend in a direction against the urging force of the urging means.

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