JPH0764336B2 - Binding machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a binding machine for binding a bound member such as a reinforcing bar with an iron wire.

(Prior Art) As one of devices for binding a plurality of rebars with an iron wire at their intersections, the iron wire is wound around the rebar a plurality of times to form a loop of the iron wire, and a pin is inserted into the loop. There is a binding machine that twists the iron wire wound in a plurality of turns by rotating the iron wire around an axis that is orthogonal to the axis and extends in the diametrical direction of the loop (JP-A-60-51).
No. 265).

However, in this binding machine, since the iron wire is wound multiple times,
The amount of iron wire used and consumed is large and the amount of iron wire used and consumed is large because the size of the loop must be large enough to insert a pin into the loop. Further, in this reinforcing bar binding machine, when the iron wire is strongly twisted, the pin is bound by the part of the iron wire opposite to the reinforcing bar, so the pin cannot be pulled out from the twisted iron wire, and as a result, the iron wire is strongly twisted. I can not do it, and the cohesion is weak.

As another one of the binding machines, the iron wire is wound around the reinforcing bar once, the front end of the reinforcing bar is intersected with the rear end in an X shape, and the iron wire is cut at a position behind the intersection, and the cut iron wire is cut. It has been proposed to twist the cut iron wire by rotating the twisting mechanism while maintaining the front end and the rear end of the inside of the hole or groove formed in the twisting mechanism. Yes (Actual exploitation 57-11
706, JP-B-48-160, JP-A-49-37795).

Thus, according to the binding machine that rotates the twisting mechanism while maintaining both ends of the iron wire in the hole or groove of the twisting mechanism, compared to the binding machine that winds the iron wire around the reinforcing bar a plurality of times. Since it is only necessary to wind the rebar around the rebar once, there is an advantage that the amount of rebar used per one time is small and it is economical.

However, in the binding machine using the above twisting mechanism,
Only by holding the end portion of the iron wire with frictional force, the end portion of the iron wire is easily pulled out from the hole or groove, and therefore the iron wire cannot be strongly twisted.

In the binding machine using the above twisting mechanism, in order to prevent the end of the iron wire receiver from coming out of the hole or groove, the end of the iron wire is projected from the hole or groove of the twisting mechanism, and the projection If the structure is such that the bent portion is locked by the twisting mechanism by bending the part, the bent portion of the iron wire extends while twisting the iron wire, which causes the iron wire to become a hole or groove in the twisting mechanism. Not only is there a possibility of slipping out, but a mechanism for bending the end of the iron wire, a mechanism for driving it, a mechanism for supporting them, etc. are required, and the structure of the twisting mechanism becomes complicated.

Furthermore, in the binding machine using the above twisting mechanism, if a member that holds the end of the iron wire in cooperation with the rotating body of the twisting mechanism is provided, the member must be rotated together with the rotating body. The structure of the twisting mechanism such as the rotating body, the holding member and their supporting mechanism becomes complicated.

(Object of the Invention) An object of the present invention is to enable a strong binding with a twisting mechanism having a simple structure.

Another object of the present invention is to reliably and beautifully twist an iron wire and to bend a twisted portion of the iron wire.

(Structure of the Invention) A binding machine according to the present invention comprises an iron wire feeding means for feeding a binding iron wire into a binding portion for twisting the iron wire, and an iron wire fed into the binding portion along a curve extending around a bound member. Guide means for guiding the iron wire, cutting means for cutting the iron wire fed to the binding portion, iron wire holding means for mutually twisting the front and rear ends of the cut iron wire, and the iron wire holding means. Drive means, and at least support means for supporting the iron wire holding means and the drive means.

The binding machine of the present invention also provides an iron wire feeding means for feeding the binding iron wire to the binding portion for twisting the binding wire, and guiding the iron wire fed to the binding portion along a curve extending around the bound member. Iron wire guide means, cutting means for cutting the iron wire fed into the binding portion, iron wire holding means for mutually twisting the front end portion and the rear end portion of the cut iron wire, and driving means for driving the iron wire holding means. A supporting means for supporting the iron wire feeding means, the iron wire guiding means, the iron wire cutting means, the iron wire holding means and the driving means, and a supporting means for linearly movably supporting the supporting means, Activating means for activating the bearing means.

In any of the binding machines, the iron wire holding means is a rod extending from the binding portion to the side opposite to the iron wire guiding means and rotatable about its own axis, and the front end portion and the rear end portion of the iron wire. Has a pair of elastically deformable holding pieces at the end on the side of the bundle detecting section for defining a recess for receiving and for releasably holding the front end and the rear end of the iron wire. A rod which is rotated by means, and an annular member which is arranged around the rod so as to be movable in the axial direction of the rod, and elastically deforms the holding piece portion in a direction in which the tip end portion of the holding wire portion is elastically deformed. And an annular member that is moved in the axial direction of the rod so as to releasably hold the front end portion and the rear end portion by the holding piece portion.

(Operation and Effect of the Invention) The iron wire passes through the recess of the rod, is guided around the member to be bound, and is passed through the recess of the re-rod. The iron wire is then cut at a portion of the rod posterior to the recess, and at the same time or before or after this, the annular member is moved relative to the rod. As a result, both ends of the cut iron wire are held by the holding pieces of the rod. The iron wire is then twisted at both ends by rotating the rod about its axis.

According to the present invention, by moving the annular member, the nipping piece portion of the rod is elastically deformed by the annular member in the direction in which the tip portions of the rods are close to each other. Since the iron wire holding means has a simple structure, the iron wire is not likely to come off from the holding piece portion, and therefore the bundled members are strongly bound even though the structure is simple. be able to.

Further, according to the present invention, the iron wire feeding means, the iron wire guiding means, the iron wire cutting means, the iron wire holding means and the driving means supported by the support means are linearly movable with respect to the bound member, so that the iron wire is bound by the bound member. After wrapping the wire around the wire, the support means is retracted with both ends of the iron wire clamped by the gripping pieces to bring the iron wire into contact with the member to be bound, thereby tensioning the wound iron wire. It can be twisted, and therefore the iron wire can be twisted reliably and beautifully.

Further, according to the present invention, the twisted portion of the iron wire can be pushed and bent by the iron wire holding means by advancing the support means after finishing the twisting of the iron wire.

(Example) Hereinafter, the Example of this invention shown in drawing is described.

The reinforcing bar binding machine 10 shown in FIG. 1 to FIG.
A support mechanism (16) that supports various mechanisms for bundling with the rebar (12) so as to be able to approach and retract. The reinforcing bars 12 are vertical bars for concrete piles and spiral bars wound around the reinforcing bars 12 in the illustrated example, but other reinforcing bars can be used.

As shown in FIGS. 1 and 2, the support mechanism 16 supports a slider 20 reciprocally movable on a guide rail 18 extending in the horizontal direction. The guide rail 18 has a pair of guide rods 26 extending in the horizontal direction attached in parallel to a pair of support walls 24 standing in parallel from opposite ends of a rectangular base 22. The slider 20 is supported by a guide rod 26, and is reciprocally moved in the horizontal direction along the guide rod 26 by an operating mechanism 28. The actuating mechanism 28 is a double-acting cylinder device in the illustrated example, but may be another mechanism.

A support frame 30 is attached to the slider 20 as shown in FIGS. 1 and 2. Bearing frame 30
Is a first frame 30a attached to the side of the slider 20 by a plurality of bolts 32, and a second frame 30b attached to the first frame by a plurality of bolts 34.
And a third frame 30c attached to the second frame by a plurality of bolts 36.

In the third frame 30c, as shown in FIGS. 2 and 4, the tip portion of the long iron wire 14 is attached to the binding portion of the iron wire binding machine 10.
An iron wire feeding mechanism 40 for feeding to the 38 is arranged. The iron wire feeding mechanism 40 includes a pair of feed rollers 42 and 44 for feeding the iron wire 14 into the binding portion 38. As shown in FIG. 9, the feed roller 42 is provided on a shaft 46 rotatably supported by a bearing on the third frame 30c. On the other hand, the feed roller 44 is provided on a shaft 50 shown in FIG. 11 which is rotatably supported by one end of a lever 48 via a bearing. The feed rollers 42 and 44 are provided with gears 52 and 54 which mesh with each other, as shown in FIG.

The lever 48 has a pivot 55 shown in FIG. 9 on the third frame 30c.
It is rockably supported by. As shown in FIG. 2, one end of a slide shaft 56 is connected to the other end of the lever 48. The slide shaft 56 slidably penetrates a support base 58 attached to the third frame 30c by a plurality of bolts and extends horizontally to the left in FIG. 2, and has two nuts 59 at the other end. It is provided.

A compression coil spring 60 is arranged between the nut 59 and the support base 58. Therefore, the slide shaft 56 receives the moving force to the left in FIG. 2 by the spring 60, and the lever 48 receives the rotating force in the direction in which the feed roller 44 is pressed by the feed roller 42. The pressing force of the feed roller 44 against the feed roller 42 can be adjusted by adjusting the position of the nut 59 with respect to the slide shaft 56.

The lever 48 also receives a rotational force in a direction in which the feed roller 44 is pressed against the feed roller 42 by the single-acting cylinder device 62 when the iron wire 14 is fed. In the cylinder device 62, the piston rod of the cylinder device is normally retracted into the cylinder tube, but when pressurized liquid or compressed air is supplied to the base end side of the cylinder tube, that is, the advancing side chamber, the piston rod moves to the cylinder side. It is a known device that advances from a tube. The cylinder device 62 includes a lever 48, a slide shaft 56, and a spring.
Together with 60 and the nut 59, a pressing mechanism for pressing the feed roller 44 against the feed roller 42 is configured.

The iron wire feed mechanism 40 also includes a rotation source 64 for rotating the feed rollers 42 and 44, as shown in FIG. Rotation source 6
Reference numeral 4 is an air motor in the illustrated example, and its rotating shaft is provided with a gear 66, and the gear 66 meshes with a gear 68 shown in FIG. 9 provided on a shaft 46 to which the feed roller 42 is attached. . Therefore, the rotation of the rotation source 64 is transmitted to the feed roller 42 via the gears 66, 68 and the shaft 46, and is transmitted from the feed roller 42 to the feed roller 44 via the gears 52, 54.

Behind the feeding rollers 42, 44 in the feeding direction of the iron wire 14, the iron wire 14
A guide 70 that guides the sheet to the feed rollers 42 and 44 is arranged. The guide 70 has a through hole for the radio 14,
Further, the third frame is placed in a posture in which the through hole extends obliquely upward.
It is fixed at 30c. The iron wire 14 is guided to the feed rollers 42 and 44 through the through holes, and is fed to the binding portion 38 while being sandwiched between the feed rollers 42 and 44.

The iron wire fed into the binding portion 38 is guided by the iron wire guide mechanism 72 along a curve extending around the reinforcing bar 12. The iron wire guide mechanism 72 includes first and second semicircular guides 74 and 76 that define the binding portion 38. The guides 74, 76 have substantially semicircular recesses 78, 80, and the guide grooves 82, 84 shown in FIGS. 3 and 4 extending in the circumferential direction in the recesses. The first and second guides 74 and 76 are symmetrical with respect to the rotation center axis line of the iron wire holding mechanism 116, which will be described later, and the recesses 78 and 80.
Are arranged so as to face each other, and in the plane in which the iron wire 14 is sent out, the front end portions are angularly rotatable in the direction toward each other, and the second frame 30b is formed by the pins 86 and 88 at the rear end portions. It is supported by the forked part of the.

As shown in FIGS. 2 and 4, the first and second guides 74 and 76 have slots 90 and 92 at the ends on the side of the pins 86 and 88, respectively. Actuating pins 94 and 96 are slidably fitted in the pin. The operating pins 94 and 96 are attached to the operating piece 98 as shown in FIGS. 12 to 14. The operating piece 98 is
The second frame 30b is attached to a pair of operating shafts 100 that are movably supported by the second frame 30b.
Fixed to the actuation source 102, and actuation source 1
By 02, the pins 86, 88 are linearly moved in a plane parallel to the plane of rotation of the guides 74, 76. Therefore, the first and second guides 74 and 76 are angularly rotated about the pins 86 and 88 by the operating pins 94 and 96, in the directions in which the tips of the guides 74 and 76 deviate from each other. The actuation source 102 is a double-acting cylinder device in the illustrated example.

The iron wire guide mechanism 72 is also an iron wire fed to the binding portion 38.
A third guide 104 is provided for crossing the front end portion of 14 with the base end side portion, that is, the rear end portion. The third guide 104 is
The first and second guides 74, 76 are supported on the tip end of the second frame 30b by a pivot 106 extending in a plane parallel to the planes of rotation of the first and second guides 74, 76 and in a direction orthogonal to the iron wire holding mechanism 116. Has a pin 107 that engages with the pair of operating piece portions 98a, 98b. The operating piece portions 98a and 98b are separated from each other in the moving direction of the operating piece 98.

When the operating piece 98 is moved forward, as shown in FIGS. 1 to 4, the tips of the first and second guides 74 and 76 are brought closer to each other by the movement of the operating pins 94 and 96, and the iron wires are moved. The third guide 104 is rotated to the first position for receiving the operation piece 98a.
Thereby, the first and second guides 74, 76 are advanced to the first position in which they project toward the base end side of the binding portion 38 defined by the recesses 78, 80 of the first and second guides 74, 76.

On the other hand, when the operating piece 98 is retracted, the distal ends of the first and second guides 74 and 76 are separated from each other by the operating pins 94 and 96, as shown in FIGS. Rebar 12
Is rotated to a second position allowing the twisting of the iron wire 14 fed into the binding portion, and the third guide 10 is rotated.
4 is retracted from the binding portion 38 by the operating piece portion 98b.

When the first, second, and third guides 74, 76, 104 are in the first position shown in FIGS. 1 to 4, the guides 74, 76 move the iron wire 14
Of the first guide 74 is received on the base end side of the guide groove 82 of the first guide 74, that is, on the pin 86 side, and is guided from the tip end side of the guide groove 82 to the tip end side of the guide groove 84. The iron wire is guided to the base end side of the guide groove 84, and the third guide 104 guides the iron wire guided to the base end side of the guide groove 84 to the iron wire feeding mechanism 40.
Guide in the direction intersecting the feeding direction of the iron wire 14 by. As a result, the iron wire 14 is attached to the first and second guides 7
The loops are first guided around the reinforcing bars 12 by 4, 76, and then the third guide 104 prevents the tip from being fed to the side of the first guide 74.
Crossed with the rear end of 14

The iron wire guide mechanism 72 preferably has a structure for guiding the iron wire 14 in a loop shape, but may have a structure for guiding the iron wire 14 in a U shape.

The reinforcing bar binding machine 10 also uses the iron wire 14 sent to the binding section 38.
A cutting mechanism 108 for cutting the. The cutting mechanism 108
As shown in FIG. 3 and FIG. 7, a cylindrical cutter 110 is supported so as to be linearly movable in the direction of the rotation axis of the iron wire holding means 116. The cutter 110 is supported by the second frame 30b so as to be able to move forward and backward with respect to the binding portion 38, and also to the second frame 30b.
It is operated by an operation mechanism 112 fixed to the frame 30b of the. The cutter 110 is composed of a small-diameter first cylindrical portion located on the guide 74, 76 side and a large-diameter second cylindrical portion extending from the first cylindrical portion to the side opposite to the guides 74, 76. In addition, the second cylindrical portion is slidably supported by the second frame 30b and is connected to the actuating mechanism 112. The first tubular portion is a cutter portion for cutting the iron wire.

The actuating mechanism 112 is a double-acting cylinder device in the illustrated example, and normally causes the cutter 110 to retreat by air pressure, but when the iron wire 14 is cut, the cutter 110 is advanced toward the binding portion 38.

The cutting mechanism 108 also includes a die 114 that assists the cutter 110 in cutting the iron wire. The die 114 receives the iron wire 14 sent from the iron wire feeding mechanism 40, and is arranged between the iron wire feeding mechanism 40 and the binding portion 38 to guide the iron wire 14 to the binding portion 38,
It is also fixed to the second frame 30b. Die 114
It has a hole for guiding the iron wire 14. An end surface of the die 114 on the binding portion 38 side, that is, an end surface on the iron wire outlet side is a flat surface parallel to the rotation axis of the iron wire holding mechanism 116 so as to cut the iron wire 14 in cooperation with the cutter 110.

The reinforcing bar binding machine 10 further includes an iron wire holding mechanism 116 that holds the front end and the rear end of the cut iron wire 14 and twists the front end and the rear end. The iron wire holding mechanism 116 is shown in FIGS.
As shown, a plurality of bearings 118 allow the second frame 3
It includes a chuck rod 120 rotatably supported at 0b.
In the illustrated example, the chuck rod 120 extends from the bundling portion 38 through the cutter 110 and extends along the bisector of the angle formed by the front end portion and the rear end portion of the iron wire 14 on the side opposite to the iron wire guide mechanism 72. And is rotatable about the bisector. 2 above
The bisector is parallel to the moving direction of the slider 20 of the support mechanism 16.

As shown in FIG. 15, the chuck rod 120 has a pair of elastically deformable holding pieces 124 that define a recess 122 that receives the front end and the rear end of the iron wire 14 on the iron wire guide mechanism 72 side. An outer peripheral surface of the holding piece portion 124 on the iron wire guide mechanism 72 side has a truncated cone shape whose bottom surface is on the iron wire guide mechanism 72 side.

Around the iron wire guide mechanism 72 side of the chuck rod 120,
A tubular slider 126 for controlling the holding and releasing of the iron wire 14 by the holding piece portion 124 is arranged slidably in the axial direction of the chuck rod 120. The slider 126 is
It is rotatably supported by a plurality of bearings 128 in the hollow portion of the cutter 110, and is moved together with the cutter 110 in the axial direction with respect to the chuck rod 120 when the cutter 110 moves.

The actuating mechanism 130 for the chuck rod 120 comprises an air motor mounted in the first frame 30a in the example shown. The rotation of the operating mechanism 130 is performed by a gear 132 provided on the output shaft thereof and a gear 134 meshed with the gear and fixed to the end of the chuck rod 120 on the side opposite to the iron wire guide mechanism 72. Transmitted to 120.

At the end of the chuck rod 120 on the side of the gear 134, there is provided a ratchet wheel 138 that constitutes a ratchet mechanism together with a pawl 136 arranged on the second frame 30b. The ratchet wheel 138 is fixed to the chuck rod 120 with a plurality of bolts, and the posture of the chuck rod 120 at the start of binding is determined by setting the iron wire in the recess 1
22 has teeth 140 that engage pawls 136 for positioning in an acceptable position.

During standby, iron wire feed mechanism 40 and iron wire guide mechanism of reinforcing bar binding machine 10
72, cutting mechanism 108, iron wire holding mechanism 116 and operating mechanism 130
Are retracted from the reinforcing bar 12 by the support mechanism 16.

During standby, the iron wire 14 has not been fed into the binding portion 38. Further, since the claw 136 of the chuck rod 120 is locked to the tooth 140 of the ratchet wheel 138, the recess 122 thereof has an iron wire outlet of the die 114,
The first guide 74 and the iron wire outlet of the second guide 76 are maintained to face the iron wire receiving opening and the iron wire outlet of the second guide 76, respectively. Further, since the cutter 110 of the cutting mechanism 108 and the slider 126 of the iron wire holding mechanism 116 are retracted with respect to the chuck rod 120 by the operating mechanism 112 of the cutting mechanism 108, as shown in FIGS. Opens the iron wire outlet of the die 114, the slider 126 separates from the holding piece portion 124 of the chuck rod 120, and the recess 122 of the holding piece portion 124 is opened in a posture of receiving the iron wire by its own spring force.

At the time of binding, the iron wire binding machine 10 first sets the operation source of the iron wire guide mechanism 72.
102 is activated. As a result, the guides 74, 76, 104 of the iron wire guide mechanism 72 are retracted from the binding portion 38 by the actuation source 102, so that the guides 74, 76 are separated from each other as shown in FIGS. 6 and 8.

In this state, next, after the actuation mechanism of the support mechanism 16 is actuated, the actuation source 102 of the iron wire guide mechanism 72 is actuated. By moving the slider 20 of the support mechanism 16 forward,
The iron wire feeding mechanism 40, the iron wire guiding mechanism 72, the cutting mechanism 108, the iron wire holding mechanism 116, and the operating mechanism 130 are advanced toward the reinforcing bar 12 by the supporting mechanism 16, and then the guide of the iron wire guiding mechanism 72.
74, 76 and 104 are advanced and brought close to each other as shown in FIGS.
As a result, the guides 74 and 76 are arranged in a posture that surrounds the reinforcing bar 12.

Next, the rotation source 64 of the iron wire feeding mechanism 40 is operated for a predetermined time, so that the iron wire feeding mechanism 40 binds the iron wire 14 to the binding portion 38.
Send a predetermined amount to. The iron wire 14 sent to the binding portion 38 is
After passing through the recess 122 of the chuck rod 120 and the guides 74, 76, 104, around the reinforcing bar 12, and further, the front end of the iron wire intersects with the rear end thereof, the chuck rod 120 is guided to reach the recess 122.

The iron wire feeding mechanism 40 is slightly reversed after feeding the iron wire 14 by a predetermined amount. As a result, a force acts on the iron wire 14 in the direction in which the iron wire is returned to the iron wire feeding mechanism 40 side. This force is due to the fact that the guide grooves 82, 84 of the guides 74, 76 are open inside the loop formed by these grooves and the iron wire
14 extends in the guide grooves 82, 84, and the iron wire 14 abuts the guides 74, 76 in the guide grooves 82, 84, whereby the iron wire 14 and the guides 74, 76 extending in the guide grooves 82, 84 Since there is a frictional force therebetween, the iron wire 14 acts on the iron wire 14 such that the displacement start time of the iron wire 14 is later on the tip side. For this reason,
The iron wire 14 is returned to the iron wire feeding mechanism 40 side by a predetermined length without being pulled back. By this, the binding part
Since the iron wire 14 delivered to the 38 is narrowed down so that the loop becomes small, the usage amount of the iron wire is reduced.

Then, the actuation mechanism 112 of the cutting mechanism 108 is actuated. Accordingly, the cutting machine 108 cuts the iron wire 14 by moving the cutter 110 toward the binding portion 38 while contacting the end surface of the die 114 on the iron wire outlet side. Further, when the cutter 110 is moved, the slider 126 of the iron wire holding mechanism 116 is advanced to the binding portion 38 side with respect to the chuck rod 120, so that the holding piece portion 124 of the chuck rod 120 is cut into the recess 122. Iron wire 1
They are brought close to each other with the front end and the rear end of 4 being received. As a result, the iron wire 14 is held by the holding piece portion 124 at the front end portion and the rear end portion thereof.

Next, after the actuation source 102 of the iron wire guide mechanism 72 is actuated in the opposite manner to the above, the actuation mechanism 28 of the support mechanism 16 is actuated in the opposite manner. As a result, with the guides 74, 76, 104 of the iron wire guide mechanism 72 retracted from the binding portion as shown in FIGS. 6 and 8, the iron wire feed mechanism 40, the iron wire guide mechanism 72, and the cutting mechanism 10
8. Since the iron wire holding mechanism 116 and the operating mechanism 130 are retracted from the reinforcing bar 12, the iron wire 14 held by the chuck rod 120 is
Is contacted with the reinforcing bar 12 and tensioned.

Next, the rotation source 130 is operated for a predetermined time, and the chuck rod 1
Slider 1 with 20 holding an iron wire in its holding piece 124
It is rotated together with 26 about the central axis of rotation for a predetermined time. Thereby, the iron wire 14 is twisted and binds the reinforcing bar 12. In this way, with the iron wire 14 tensioned, the chuck rod 120
By rotating, the iron wire 14 can be twisted reliably and beautifully. The binding force of the reinforcing bar 12 by the iron wire 14 can be adjusted by the twist amount of the iron wire 14, that is, the number of rotations of the chuck rod 120.

When the twisting of the iron wire 14 is finished, the binding machine 10 causes the iron wire feeding mechanism 40, the iron wire guiding mechanism 72, the
The cutting mechanism 108, the iron wire holding mechanism 116, and the operating mechanism 130 are advanced toward the reinforcing bar 12. As a result, the twisted portion of the iron wire 14 is pushed and bent.

After that, when the operating mechanism 112 of the cutting mechanism 108 is returned, the cutter 110 is retracted to open the iron wire outlet of the die 114, and the slider 126 of the iron wire holding mechanism 116 is retracted with respect to the chuck rod 120 to chuck the chuck. The rod 120 opens the iron wire 14. Finally, the iron wire binding device 10 includes the iron wire feed mechanism 40 and the iron wire guide mechanism by the operation mechanism 28 of the support mechanism 16.
72, cutting mechanism 108, iron wire holding mechanism 116 and operating mechanism 130
Is retracted from the reinforcing bar 12, thus completing one binding process.

The present invention can also be applied to a manually operated rebar binding machine. In this case, the support mechanism 16 is unnecessary.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a reinforcing bar binding machine of the present invention,
2 is a plan view of the reinforcing bar binding machine of FIG. 1, FIG. 3 is a sectional view taken along line III-III of FIG. 2, and FIG. 4 is IV of FIG.
-A sectional view taken along line IV, Fig. 5 is an enlarged front view of the vicinity of the guide of the iron wire guide mechanism when retracted,
FIG. 6 is an end view taken along line VI-VI in FIG. 5, and FIG. 7 is VI in FIG.
A sectional view taken along line I-VII, FIG. 8 shows VIII- in FIG.
Sectional view taken along line VIII, FIG. 9 is a sectional view taken along line IX-IX in FIG. 4, and FIG. 10 is a rear view of the iron wire feeding mechanism.
FIG. 11 is a cross-sectional view showing how the feed roller is attached to the lever, FIG. 12 is a front view of the iron wire guide mechanism, FIG. 13 is a right side view of FIG. 12, and FIG. 14 is a left side view of FIG. Fig. 15 is a front view showing a chuck rod, a ratchet wheel and a claw, and Fig. 16 is a fifteenth view.
It is a left side view of a figure. 10: Reinforcing bar binding machine, 12: Reinforcing bar, 14: Iron wire, 16: Support mechanism for supporting means, 18: Guide rail, 20: Slider for supporting mechanism, 28: Actuating mechanism for slider, 30: Supporting means, 38: Binding section , 40: iron wire feed mechanism, 42,44: feed roller, 48: lever, 56: slide shaft, 60: spring, 62: cylinder device, 64: iron wire feed mechanism rotation source, 72: iron wire guide mechanism, 74, 76, 104 : Guide, 78, 80: Recess, 82, 84: Guide groove, 98: Iron wire guide mechanism operating source, 108: Cutting mechanism, 110: Cutter, 112: Cutting mechanism operating mechanism, 114: Die, 116: Iron wire Holding mechanism, 120: Chuck rod (rod), 122: Recess, 124: Holding piece part 126: Iron wire holding mechanism slider (annular member), 130: Iron wire holding mechanism rotation source, 136: Claw, 138: Claw wheel , 140: Teeth.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-49-37795 (JP, A) SAIKAI Shou 57-11706 (JP, U) JP-B 48-160 (JP, B1) SAKURA 52- 7518 (JP, Y2)

Claims (12)

[Claims] 1. An iron wire feeding means for feeding a binding iron wire into a binding portion for twisting the iron wire, and an iron wire guiding means for guiding the iron wire fed into the binding portion along a curve extending around a member to be bound. A cutting means for cutting the iron wire fed to the bundling section, an iron wire holding means for mutually twisting a front end portion and a rear end portion of the cut iron wire, and a driving means for driving the iron wire holding means, at least the An iron wire holding means and a supporting means for supporting the driving means, the iron wire holding means extending from the binding portion to the side opposite to the iron wire guiding means and rotating around the axis of the supporting means. A pair of rotatably supported rods elastically deformable for defining a recess for receiving the front and rear ends of the iron wire and for releasably clamping the front and rear ends of the iron wire. A rod that has a holding piece portion at the end portion on the side of the binding portion, and is rotated by the drive means,
An annular member that is arranged around the rod so as to be movable in the axial direction of the rod, and elastically deforms the holding piece portion in a direction in which the tip end portions of the holding piece portion are elastically deformed so that the front end portion and the rear end portion of the iron wire are An annular member that is moved in the axial direction of the rod so as to be releasably held by a holding piece.
Binding machine. 2. The iron wire guide means has a guide for guiding a tip end portion of the iron wire in a direction in which the tip end portion of the iron wire intersects with a rear end portion of the recess of the rod. The binding machine described in. 3. The rod according to claim 2, wherein the rod is rotated around an axis extending in a direction of a bisector of a crossing angle between the front end portion and the rear end portion of the iron wire. Binding machine. 4. The iron wire feed means comprises a pair of feed rollers for feeding the iron wire into the binding portion, a reversible rotation source for rotating the feed rollers, and one of the feed rollers with respect to the other. The binding machine according to claim (1), (2) or (3), further comprising: a pressing unit. 5. The pressing means is a lever pivotally supported by a supporting means for the iron wire feeding means, and one end of the lever rotatably supporting one of the feeding rollers, and the lever of the lever. A sliding shaft connected to the other end and slidably supported by the supporting means; and a spring for applying a force to the sliding shaft in a direction in which a feed roller supported by the lever is pressed by the other feed roller. The binding according to claim (4), further comprising: a single-acting cylinder device that releasably applies a force in the same direction as the rotation direction of the lever by the force of the spring to the other end of the lever. Machine. 6. The rod guide means comprises first and second guides each having a substantially semi-circular recess and a guide groove for the iron wire extending in the circumferential direction in the recess. Are arranged symmetrically with respect to the axis of, and are rotatably angularly rotatable in directions away from each other and supported by a support means for the iron wire guide means, and when the iron wires are brought close to each other, the iron wire is at the base end portion of the first guide. And second guides for receiving the same from the side of the guides and for guiding the guides, and the bearing means for allowing access to and from the space formed by the recesses of the two guides when the first and second guides are close to each other. Supported by the second
A third guide for guiding the tip end portion of the iron wire guided to the base end portion of the guide in a direction intersecting the receiving direction of the iron wire into the first guide; and the first, second and third guides.
The binding machine according to any one of claims (1) to (5), further comprising: an actuating means for the guide. 7. A cutter having a hollow part for rotatably receiving the annular member of the iron wire holding means and a cutter part for cutting the iron wire, and the cutting means holding the iron wire together with the annular member. The binding machine according to any one of claims (1) to (6), further comprising: an actuating unit that reciprocates in the axial direction of the rod of the unit. 8. A claw wheel having at least one tooth is provided at an end portion of the rod opposite to the holding piece portion, and the posture of the rod is fixed to the supporting means by the iron wire of the rod. The binding machine according to claim (7), wherein a claw that engages with the tooth to prevent the rod from being reversed is provided so as to position the tooth in an acceptable position in the recess. 9. The drive means meshes with a rotation source, a first gear provided on a rotation shaft of the rotation source, and the first gear, and a second gear provided on the iron wire holding means. The binding machine according to any one of claims (1) to (8), comprising a gear. 10. An iron wire feeding means for feeding a binding iron wire into a binding portion for twisting the binding wire, and an iron wire guiding means for guiding the iron wire fed into the binding portion along a curve extending around a member to be bound. A cutting means for cutting the iron wire fed into the binding portion, an iron wire holding means for mutually twisting a front end portion and a rear end portion of the cut iron wire, a driving means for driving the iron wire holding means, and the iron wire. A supporting means for supporting the feeding means, the iron wire guiding means, the iron wire cutting means, the iron wire holding means and the driving means, a supporting means for linearly moving the supporting means, and the supporting means. The iron wire holding means is a rod extending from the binding portion to the side opposite to the iron wire guiding means and rotatably supported by the supporting means about its own axis. A pair of elastically deformable holding pieces for releasably holding the front end and the rear end of the iron wire to define a recess for receiving the front end and the rear end of the iron wire. A rod which has an end on the side of and which is rotated by the drive means,
An annular member that is arranged around the rod so as to be movable in the axial direction of the rod, and elastically deforms the holding piece portion in a direction in which the tip end portions of the holding piece portion are elastically deformed so that the front end portion and the rear end portion of the iron wire are An annular member that is moved in the axial direction of the rod so as to be releasably held by a holding piece.
Binding machine. 11. The binding machine according to claim 10, wherein said support means is supported by said support means so as to be linearly movable in the direction of the axis of said rod. 12. The support means includes a guide rail and a slider which is reciprocally supported along the guide rail and is supported by the guide rail to support the support means. Bundling machine according to item (11).