JPH07290177A - Reinforcing bar binding machine - Google Patents

Abstract

PURPOSE:To allow a worker to bind reinforcing bars in a standing position by feeding the iron wires to a reinforcing bar binding part, guiding them around the reinforcing bars, and connecting a means to turn the iron wires to be stranded, a holding part for the worker, and a switch to each other with a long cylindrical connecting body. CONSTITUTION:A cross part of reinforcing bars 12, 16 is bound by iron wires. A worker 28 supports a reinforcing bar binding machine with a holding part 26 mounted on a supporting means 18. The supporting means 18 is connected to a lower main body 22 by a connecting body 24. The lower main body 22 is provided with a guide means 140 to guide the iron wires 16 around the reinforcing bars 12, 16, an iron wire feeding means to feed the iron wire to a binding part of the reinforcing bars 12, 16, and a stranding means to turn the iron wire in a stranding manner. The worker 28 operates the respective means of the lower main body 22 by a switch at hand. This constitution allows the worker 28 to execute the binding work in a standing position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing bar binding machine for binding reinforcing bars with a reinforcing wire at a binding portion, and more particularly to a reinforcing bar binding machine for twisting loops of the reinforcing wire extending around the reinforcing bars.

[0002]

2. Description of the Related Art At construction sites of reinforced concrete structures, production sites of reinforced baskets for reinforced concrete pipes, etc.
A work of binding a plurality of reinforcing bars with iron wires at their intersections is performed.

As one of the devices used for such binding work, an iron wire is fed toward a binding portion, and the iron wire is fed by a pair of arc-shaped guides so as to wind the fed iron wire around the reinforcing bars to be bound in a loop. There is a portable rebar binding machine that guides along a curved path around the rebar to form a loop of the rebar and twists the loop of the rebar by a twisting means (twisting means). 2-29409, JP-A-5-3494).

In all of the known reinforcing bar binding machines, when binding the reinforcing bars for the floor of the reinforced concrete structure, the operator must work in a bent state, and the workability is poor.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to enable a worker to bind reinforcing bars in a standing state.

[0006]

A reinforcing bar binding machine of the present invention includes an iron wire feeding means for feeding an iron wire to a binding part for binding the reinforcing bar by the iron wire, and a guide for guiding the iron wire fed to the binding part around the reinforcing bar. Means, twisting means rotated about a first axis intersecting the rebar to twist the rebar guided around the rebar, and drive means for actuating the rebar feed means and the twisting means, It includes the iron wire feeding means, the guiding means, the twisting means, and a supporting means for supporting the driving means.

The support means comprises a first body having at least a switch for controlling the drive means and at least one grip for an operator, and a second body supporting at least the guide means and the twisting means. And a tubular connector that is longer than the first and second bodies and connects the first and second bodies.

According to the present invention, the first main body having the switch and the gripping portion and the second main body supporting the guide means and the twisting means are formed by a tubular connecting body longer than the first and second main bodies. Since they are connected, the operator does not have to bend down when binding the reinforcing bars for the floor, and therefore the reinforcing bars can be bound in the upright state.

The guiding means may be supported on the end of the second body opposite to the first body.

Further, the drive means is disposed on the first main body, and the drive means is disposed on the first main body, and the drive means is connected to the iron wire feeding means and the twisting means. It is preferable to arrange the inside of the connecting body so as to extend the body in the longitudinal direction. As a result, it is possible to prevent the center of gravity from being bent toward the one end of the supporting means, which facilitates the handling of the binding machine.

The driving means includes a rotation source attached to the first main body, and first and second clutches for receiving rotation of the rotation source, and the transmission means has a length extending in the coupling body. A first and a second transmitter of the scale, the first
It is preferable that the first transmission member and the second transmission member are connected to the output shafts of the first and second clutches at one end and to the iron wire feeding means and the twisting means at the other end, respectively. Thereby, the iron wire feeding means and the twisting means can be operated by the common rotation source.

Each of the first and second transmission bodies is a first and a second shaft member extending in the longitudinal direction in the connecting body, and is capable of relative movement in the longitudinal direction, but of the axis line. The first and second shaft members are connected to each other at one end so as not to rotate relative to each other, and the connecting body is one of the first and second main bodies at one end. A first tubular member fixed to the first tubular member, and a second tubular member fixed to one of the first and second main bodies at one end and the first tubular member at the other end. A second tubular member that receives the other end of the cylindrical member so as to be relatively movable in the longitudinal direction; and a screw member that removably blocks the relative displacement of the first and second members. It is preferable. Thus, the overall length of the supporting means can be adjusted, and thus the length dimension of the binding machine can be adjusted according to the physique of the operator.

It is preferable that the switch is arranged at a portion where an operator can operate the switch with a finger of a hand holding the grip portion. This further improves workability.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIGS. 1 to 6, a reinforcing bar binding machine 10
Is used as a reinforcing bar binding machine for binding the reinforcing bars 12 and 14 shown in FIG. Reinforcing bars 12 and 14 are vertical bars and horizontal bars for floors of reinforced concrete structures, but for walls of reinforced concrete structures,
It may be vertical bars and horizontal bars of precast / concrete plate, etc., or main pillars and hoop bars for precast / concrete columns, vertical bars for concrete pile and spiral bars that are wound around them, etc. It may be a reinforcing bar.

The reinforcing bar binding machine 10 includes support means 18 for supporting various mechanisms. The supporting means 18 mutually connect the first and second main bodies 20 and 22 and the first and second main bodies 20 and 22 each in the form of a halved casing, which are connected to each other in a superposed state by a plurality of screws. And a cylindrical connecting body 24 that is connected to.

As shown in FIGS. 1 and 3, the first main body 20 has a pair of grips 26. Therefore, the reinforcing bar binding machine 10 is portable, and therefore, the worker 28 can carry the reinforcing bar binding machine 10 and manually operate it, and can be used at any place in both the factory and the work site. You can In the illustrated example, the grip 2
6 extends substantially horizontally from opposite side wall portions in opposite directions.

As shown in FIGS. 1 to 5, the connecting body 24 is
First and second bodies 20, 2 in the longitudinal direction of this
2 has a length dimension greater than the length dimension of 2. Further, the connecting body 24 is attached to the first main body 20 with a plurality of screws or the like at one end, and is attached to the second main body 22 with a plurality of screws or the like at one end. The second tubular member 32 and the screw member 34 that removably blocks the relative displacement of the first and second tubular members 30 and 32 are provided.

In the example shown in FIG. 4, the first tubular member 30
However, the other end side receives the other end side of the second tubular member 32 so as to be relatively movable in the longitudinal direction. However, the other end of the first tubular member 30 may be inserted into the other end of the second tubular member 32 so as to be relatively movable in the longitudinal direction.

The screw member 34 is a taper nut that is screwed into an elastically deformable male screw portion 36 formed at the other end of the first tubular member 30. Releasably blocks the relative movement of the first and second tubular members 30, 32 in their longitudinal direction and their relative rotation about their axes.

Instead of releasably prohibiting the relative displacement of the two tubular members 30, 32 by the screw member 34, the relative movement of the two tubular members 30, 32 in the longitudinal direction is released by another member. By prohibiting the tubular members 30 and 32 so that they cannot rotate relative to each other, both tubular members 30,
The relative rotation of 32 may be prohibited. The first tubular member 30 is reinforced by a cover member 38 with respect to the attachment strength to the first main body 20.

As shown in FIGS. 2 and 3, the first main body 20 is provided with a drive means, that is, a drive mechanism 40. The rotation source 42 of the drive mechanism 40 is attached to the upper end of the first main body 20. The rotation source 42 is an electric motor that is supplied with power via an electric wire (not shown). However, a battery may be provided in the binding machine 10 and an electric motor supplied from this battery may be used as the rotation source 42. The battery comprises support means 18,
In particular, it can be replaceably arranged on the first body 20.

The power of the rotation source 42, that is, the rotation force, is the first
Through the upper wall of the body 20 of the
From the output shaft extending inward to the gear 44 provided on the output shaft
And a gear 46 that meshes with the gear 44, a shaft 48 to which the gear 46 is attached at one end, and a gear 50 attached to the other end of the shaft to be transmitted to the pair of electromagnetic clutches 52, 54. .

The clutch 52 has a gear 56 that meshes with the gear 50 on its input shaft and a gear 58 on its output shaft.
The clutch 54 has a gear 60 that meshes with the gear 50 on the input shaft. The clutches 52 and 54 are arranged in the first main body 20. The clutches 52 and 54 are connected by transmission means or transmission mechanism 62 to the iron wire feeding means or iron wire feeding mechanism 64 and the twisting means or twisting mechanism 66 shown in FIGS. 5 and 6, respectively.

Therefore, the rotation source 42, the gears 44, 4
6, 50, 56, 58, 60, the shaft 48, and the clutches 52, 54 act as a drive mechanism 40 that operates the iron wire feeding mechanism 64 and the twisting mechanism 66. 2 and 3, the cap or cover for covering the rotation source 42 is omitted. The cover is detachably attached to the upper end of the first main body 20 with a screw or the like.

As shown in FIGS. 2-5, transmission means 62
Is an elongated first transmitter 72 connected to the output shaft of the clutch 52 by a plurality of gears 58, 68, 70, and an elongated second transmitter 7 directly connected to the output shaft of the clutch 54.
4 and. The first and second transmitters 72, 74 are
By the receiving member 76 which is arranged in the first tubular member 30 so as not to be displaceable and the receiving member 78 which is arranged in the second tubular member 32 so as not to be displaceable, the inside of the coupling body 24 of its own axial line is prevented. It is rotatably received around.

Each of the first and second transmitters 72 and 74 has a first shaft member 80 extending in the first tubular member 30 and a second shaft member extending in the second tubular member 32. And a member 82. First and second shaft member 80
And 82 are respectively rotatably received on the first and second receiving members 76 and 78 by a plurality of bearings about an axis.

Each first shaft member 80 receives a rotational force from the corresponding clutch 52 or 54 at one end thereof, and each second shaft member 82 is connected to the corresponding iron wire feeding mechanism 64 or twisting mechanism 66 at one end thereof. Transmits rotational force. The first and second shaft members 80 and 82 are connected at their other ends so as to be relatively movable in their axial directions and non-rotatable relative to them.

In the example shown in FIG. 4, the other end of the first shaft member 80 is received in the other end of the second shaft member 82 so as to be movable in the longitudinal direction. Therefore, the second shaft member 8
The other end of 2 has a tubular shape. The relative rotation of the first and second shaft members 80, 82 is such that the pin 84 provided on the first shaft member 80 extends to the other end of the second shaft member 82 in the longitudinal direction thereof. It is prevented by movably engaging the formed slot 86.

As shown in FIG. 5, from the clutch 52 to the first
The rotational force transmitted to the transmission body 72 of the first transmission body 72
At the tip of the shaft, the universal joint 88 and the gear 90 provided on the output side of the universal joint 88 are transmitted to the iron wire feeding mechanism 64. On the other hand, the rotational force transmitted from the clutch 54 to the second transmission body 74 is twisted by the universal joint 92 in the twisting mechanism 66 at the tip of the second transmission body 74.

As shown in FIGS. 5 and 6, the iron wire feeding mechanism 64 includes a universal joint 96 rotatably supported by a base member 94 attached to the front end side portion of the first body 20 by a plurality of screws. A gear 98 mounted on the input side of the universal joint 96 and meshing with the gear 90 of the transmission mechanism 62,
The feed roller 10 attached to the output side of the universal joint 96
0, a feed roller 102 supported by a base member 94 so as to rotate together with the feed roller 100, a cylindrical guide receiver 104 supported by the base member 94, and a protection guide whose one end is received by the guide receiver 104. 106 and. The rollers 100 and 102 are synchronously rotated by gears 108 and 110 meshed with each other.

The iron wire 16 is connected to the connecting body 24 as shown in FIG.
From the reel 112 that is replaceably attached to the roller 10 through the protection guide 106 and the guide receiver 104.
You will be guided between 0 and 102.

The rotational force transmitted from the drive mechanism 40 to the first transmission body 72 is received by the gear 98 that meshes with the gear 90 attached to the first transmission body 72, and the universal joint 96 is connected from the gear 98 to the gear 98. It is transmitted to the roller 100 via the roller 100, and further transmitted from the roller 100 to the roller 102 by the gears 108 and 110. As a result, the iron wire 16 is attached to both rollers 10
0, 102, the substantially circular binding portion 142 shown in FIG.
Sent to.

As shown in FIGS. 5 and 7, the twisting mechanism 6
6 is a rotating body 114 rotated by a drive mechanism 40 around a first axis intersecting the reinforcing bars 12 and 14, and a rotating body 1
14 and a claw or hook 116 arranged at the tip end portion.

The rotating body 114 is a universal joint 92 shown in FIG.
114a that is connected to the first main body 20 and extends rotatably through the front end of the first main body 20 in the direction of the first axis.
The rear end portion is connected to the clutch 54. The rotation axis of the rotating body 114 acts as a first axis extending substantially in the radial direction of the binding portion 142 and the loop of the iron wire loop described later.

The head 114b of the rotating body 114 is a bifurcated member having a U-shaped recess 118.
18 is detachably attached to the tip of the shaft portion 114a by a pin or the like (not shown) so that the opening, that is, the open end, of the 18 is on the side of the binding portion 142. The hook 116 and the recess 118 project into the binding portion 142.

At the base end of the hook 116, a pivot pin 120 extending in a direction substantially orthogonal to the rotation axis of the rotating body 114 opens and closes the front end of the recess 118, that is, the open end of the recess 118 in the binding portion 142. It is supported by the head 114b. The hook 116 has a cross-sectional area that gradually decreases from the portion on the side of the proximal end toward the distal end, and preferably has a shape that gradually becomes thinner. The axis of the pivot pin 120 acts as a second axis parallel to the tie 142 and the axis of the iron wire loop described below.

The tip of the hook 116 has a recess 11
When 8 is closed, it is received in the groove 122 formed in the lower end of the head 114b. The hook 116 is constantly biased by the control means or control mechanism 124 to a first position that closes the recess 118.

As shown in FIG. 7, the control mechanism 124 is movable in the axial direction of the shaft portion 114a and the nut 128 screwed to the male screw portion 126 formed in the central portion of the shaft portion 114a of the rotating body 114. Preferably slidably on the shaft 114
a, the slider 130 arranged at the lower end of a, and the nut 12
8 and the slider 130, a compression coil spring 132 is provided.

The slider 130 is attached to the shaft 114a through a linear bearing 136 so that the slider 130 can move smoothly with respect to the shaft 114a of the rotating body 114. The lower end of the slider 130 is in contact with the rear end of the hook 116, and is constantly urged by the spring 132 in the direction of pushing the rear end of the hook 116.

As shown in FIG. 6B, the hook 116 is constantly urged by a spring 132 to a first position that closes the open end of the recess 118. But hook 11
6 can be displaced against the force of the spring 132 to a second position that opens the open end of the recess 118, as shown in FIG. 6 (D). The pressing force of the spring 132 is equal to the external thread 1
It can be adjusted by changing the position of the nut 128 with respect to 26, which adjusts the biasing force acting on the hook 116.

As shown in FIG. 5, the guide means 140 forming the binding portion 142 includes a pair of guides 144 and 146 arranged at the tip of the main body 20. Guide 144,
146 has an arcuate recessed portion that defines the binding portion 142, and is detachably attached to the base member 94 so that the recessed portions face each other.

The guide 144 is immovably and removably attached to the second body 22 by a pin 148. The guide 146 is attached to the base member 94 by the pin 150 so as to be angularly rotatable and detachable about an axis parallel to the axis of the substantially circular binding portion 142.

The guide 144 may be arranged on the base member 94 as described above. Similarly, the guide 146 may be disposed on the second body 22 as described above. Pins 148,1
50 is a corresponding second body 22 or base member 94.
It may be a threaded pin having a male screw to be screwed into, or a normal pin fitted to the corresponding second body 22 or base member 94.

The tip of the guide 146 is rotated angularly around the pin 150 so that the tip portion of the guide 146 is guided.
It is displaced so as to approach and move away from the tip portion of No. 4.
However, the guide 146 is constantly urged by a spring or the like (not shown) in a direction in which the tip part thereof is separated from the tip part of the guide 144 as shown by a two-dot chain line in FIG.

The guides 144 and 146 respectively twist the iron wire fed into the binding portion 142 into the recess 11 of the twisting mechanism 66.
There are iron wire guide grooves 152 and 154 on the side of the recessed portion, which guides in a loop shape around the reinforcing bars 12 and 14 through the inner portion of 8. As shown in FIG. 8, the iron wire guide grooves 152 and 154 have a U-shape that opens to the binding portion 142 side and face each other.

As shown in FIG. 5, the base member 94 includes
An iron wire feeding path 156 is formed for guiding the iron wire fed into the binding portion 142 toward a portion farther from the hook 116 in the recess 118 of the twisting mechanism 66. In the illustrated example, the iron wire feeding path 156 connects the base member 94 from the feeding roller 100, 102 side of the iron wire feeding mechanism 64 to the binding unit 1.
It is a hole penetrating to the side of 42. However, the iron wire feeding path 1
The member forming 56 may be attached to the base member 94.

The end face of the base member 94 in the vicinity of the iron wire outlet from the iron wire feeding path 156 to the bundling portion 142 has a twisting mechanism 6
No. 6 head 114b has a curved surface having substantially the same curvature as the outer peripheral surface. As a result, the iron wire outlet of the base member 94 functions as a cutting unit or a cutting mechanism that cuts the iron wire 16 at the start of rotation of the rotating body 114, in cooperation with the portion forming the recess 118 of the head 114b.

The reinforcing bar binding machine 10 is further shown in FIGS.
As shown in FIG. 5, one side portion of the guides 144 and 146 includes a positioning member 158 extending in a direction orthogonal to both the rotation axis of the rotating body 114 and the axis of the pin 150. The positioning member 158 has a pin 16 extending parallel to the pin 150.
It is fixed to the guide 146 at one end by 0. Therefore, the positioning member 158 is displaced to the position indicated by the chain double-dashed line and the position indicated by the solid line in FIG. 5 by the pivotal movement of the guide 146 about the axis of the pin 150.

The positioning member 158 is located at the position of the head 114b in the direction of the rotation axis of the rotating body 114 when it is displaced to the position shown by the solid line in FIG. For this reason, the positioning member 158 determines the position of the reinforcing bars 12 and 14 in the binding portion 142, in other words, positioning means that determines the relative positional relationship between the reinforcing bars 12 and 14 and the reinforcing bar binding machine 10, that is, positioning. Acts as a mechanism.

During standby, the hook 116 is shown in FIG.
As shown in (C), the force of the spring 132 of the control mechanism 124 maintains the open position of the recess 118 of the twisting mechanism 66 in the first position. Further, the guide 146 and the positioning member 158 are displaced to a position shown by a chain double-dashed line in FIG. Further, the rotating body 114 of the twisting mechanism 66 has the recess 11
The side opening of No. 8 is maintained at a position facing the iron wire outlet of the base member 94.

At the time of binding, the reinforcing bar binding machine 10 firstly moves the reinforcing bar 1
The reinforcing bars 12, 14 are arranged so that the crossing portions of the reinforcing bars 12, 14 are received in the binding portion 142 from between the tip portions of the guides 144, 146.
Will be moved towards the intersection.

The intersection of the reinforcing bars 12, 14 is the positioning member 1.
When it comes into contact with 58, the reinforcing bar binding machine 10 moves the positioning member 1
It is further moved so as to displace 58 to the position shown by the solid line in FIG. As a result, as shown by the solid line in FIG.
The guide 146 is angularly rotated around the pin 150,
The tip of the guide 146 is pressed against the tip of the guide 144.

When the tip of the guide 146 contacts the tip of the guide 144, the displacement of the positioning member 158 is stopped. As a result, the binding portion 142 is closed, and an annular iron wire guide path is established by the iron wire guide grooves 152, 154 of the guides 144, 146. Further, the positions of the reinforcing bars 12, 14 in the binding portion 142, and by extension, the binding machine 10 are fixed. The positions of the reinforcing bars 12, 14 are determined.

If the reinforcing bars 12 and 14 are separated from each other at their intersections, the positioning member 158 is displaced to the maximum allowable position, and then the binding machine 10 is further pushed, or the worker 28 presses the reinforcing bars with his / her feet. By stepping on or pushing 12 or 14, the reinforcing bars 12, 14 can be forced to abut at their intersections.

As described above, the positioning member 158 is displaced to the maximum allowable position, and the tip of the guide 146 is moved to the guide 14.
4, the switch 162 provided on the one grip portion 22 is operated to turn on the power source and rotate the rotation source 42, as shown in FIG.

As a result, first, the iron wire feeding clutch 5
When 2 operates for a predetermined time, the iron wire feeding mechanism 64 operates and a predetermined amount of the iron wire 16 is fed from the iron wire feeding path 134 to the bundling portion 142. At this time, since the recess 118 of the twisting mechanism 66 is formed by the bifurcated head 114b, the iron wire 16 may be fed so that it crosses the recess 118, and the iron wire feeding mechanism 64 becomes simple.

The iron wire sent to the binding portion 142 passes through a portion of the recess 118 of the twisting mechanism 66 that is deeper than the hook 116, and then passes through the iron wire guide groove 152 of the guide 144 and the iron wire guide groove 154 of the guide 146. It is formed into a loop of a plurality of turns that sequentially pass through and return to the position of the recess 118 behind the hook 116. The loop of the iron wire thus formed has a shape in which its radial direction substantially coincides with the direction of the rotation axis of the rotating body 114.

When the predetermined time for the clutch 52 has elapsed,
The clutch 52 is disengaged, and the twisting mechanism clutch 54 is operated instead for a predetermined time, whereby the iron wire feeding mechanism 6 is released.
4 is stopped, and the rotating body 114 of the twisting mechanism 66 is rotated. As a result, the iron wire 16 is cut by the cooperative action of the iron wire outlet portion of the base member 94 and the portion of the head portion 114b forming the recess 118. Further, the hook 116 is rotated together with the rotating body 114 to twist the extra portion of the loop of the iron wire.

While twisting the loop of iron wire, the hook 116
The spring 132 of the control mechanism 124 maintains a closed position for the open end of the recess 118 and an axial extension of the iron wire loop through the inside of the iron wire loop, and in that position and state Is rotated around the axis of. Therefore, the hook 116 is rotated while being engaged with the loop of the iron wire, and the extra portion of the loop of the iron wire is twisted together, as in a known manually operated hacker. As a result, the loop of the iron wire is twisted more accurately and more reliably than in the conventional binding machine.

While twisting the loop of the iron wire, the tip of the hook 116 is received in the groove 122 of the rotating body 114. Therefore, the loop of the iron wire can be reliably twisted. Further, since the rotation moment acting on the hook 116 at the time of binding is small, the hook 116 and the rotating body 11 are
4 mechanical strength and hook 116 to the rotating body 114
The mounting strength and the like can be reduced, and the structure of the twisting mechanism 66 is simplified.

After a predetermined time for the twisting mechanism has elapsed, the clutch 54 is released and the rotation source 42 is stopped. As a result, the rotation of the rotating body 114 is stopped. In this state, a part of the twisted iron wire is wound around the hook 116.

Therefore, the binding machine 10 is then displaced away from the twisted iron wire in order to disengage the hook 116 from the twisted iron wire. This allows the hook 11
6 is rotated angularly as shown in FIG. 7D about the axis of the pivot pin 120 shown in FIG. 7B against the force of the spring 132, and the open end portion of the recess 118 is rotated. It is displaced to the open second position. Meanwhile, the hook 116 is separated from the twisted iron wire, and the twisted portion (beard portion) of the iron wire
Being pulled out of. When the hook 116 is pulled out from the beard, the spring 116 causes the hook 116 to move to the recess 118.
Is returned to a first position which closes the open end of the.

When the hook 116 is pulled out from the beard portion,
A loop-shaped head having a shape similar to the cross-sectional shape of the hook 116 remains at the tip of the whisker portion of the iron wire. As a result, the length of the whiskers is shorter than that of the conventional binding machine. Further, when the hook 116 is removed from the beard portion, the hook moves from a thick portion to a thin portion with respect to the hook-shaped head portion of the beard portion, so that the hook can be easily removed from the beard portion.

When the reinforcing bars 12 and 14 are separated from the positioning member 158, the guide 146 and the positioning member 158 are used.
The tip end portion is separated from the tip end portion of the guide 144 by the spring force acting on the guide 146. In addition, rebar 12,1
While the binding machine 10 is moved to a position where 4 is outside the binding portion 142, the rotating body 114 is maintained at a position where the side portion of the recess 118 faces the iron wire outlet of the base member 94.

When the binding machine 10 is moved in the direction away from the reinforcing bars 12 and 14, the hook 116 resists the biasing force of the spring 132 of the control mechanism 124 and opens the open end of the recess 118. It is forcibly displaced to the position. In addition, when the hook 116 is pulled out from the whiskers of the iron wire, the hook 11
6 is forcibly displaced by the biasing force of the spring 132 of the control mechanism 124 to a first position that closes the open end of the recess 118. Therefore, it is not necessary to manually displace the hook 116 to the first position or the second position and maintain the position, and the structure of the control mechanism 124 for the hook 116 is simplified.

The number of loops of the iron wire wound around the binding portion of the reinforcing bars 12 and 14 is 2 to 5, preferably 2 to 3.
The number of loops of the iron wire depends on the thickness of the reinforcing bar, the guides 144, 1
It depends on the size of the annular iron wire guide path formed by the forty-six iron wire guide grooves 152 and 154, the amount of the iron wire fed at one bundling, and the like. The more the number of loops of the iron wire, the stronger the binding, but the greater the consumption of the reinforcing bar.

The amount of iron wire fed into the binding portion is determined by the size of the feed rollers 100 and 102, the rotation speed of the rotation source 42, the rotation time of the rotation source 42, and the like. Therefore, by changing the rotation speed or rotation time of the rotation source 42,
It is preferable to provide means for adjusting the feeding speed or feeding time of the iron wire. To do this, for example,
A value corresponding to the iron wire feeding speed, feeding time, etc. may be set by a variable resistor, a setter or the like, and the rotation source may be controlled by the control circuit so that the speed or time corresponds to the value.

The length of the whiskers of the twisted iron wire is 1
The length depends on the thickness of Nos. 2 and 14 and the size of the loop of the iron wire, and the longer the difference between the two, the longer the length. In addition, the binding unit 1
In some cases, it is necessary to bind the reinforcing bars that become the intersections that cannot be accommodated in 42.

In such a case, the binding machine 10 sets the size of the annular iron wire guide path formed by the iron wire guide grooves 152, 154 to an optimum value according to the thickness of the reinforcing bars to be bound. The guides 144 and 146 are connected to the iron wire guide grooves 152 and 1
The guide 54 can be replaced with another guide having a different size. Thereby, only by exchanging the guide, one reinforcing bar binding machine can be used for twisting reinforcing bars having different thicknesses, and the length of the whiskers can be set to a predetermined value.

To replace the guide 144, in FIG. 5, the pin 148 is removed from the second main body 22, the guide 144 is removed from the second main body 22, and another size guide is used.
This can be done by attaching to the second main body 22 by means of 8.

To replace the guide 146, in FIG. 5, the pin 150 is removed from the base member 94, the guide 146 is removed from the base member 94, and another size guide is used as the pin 15.
It can be carried out by attaching to the base member 94 with 0.

The size of the annular iron wire guide path formed by the two iron wire guide grooves may be changed by exchanging one guide, or may be changed by exchanging both guides. Further, one of the guides 144 and 146, for example, the guide 14 may be arranged in a non-replaceable manner, and the other may be arranged in a replaceable manner. Furthermore, the pins 148 and 150 may be maintained so as not to be disengaged or displaceable by a member such as a set screw screwed to the second main body 22 or the base member 94.

When the size of the annular iron wire guide path formed by the iron wire guide groove is changed by exchanging both guides, the new guides must have the same radius of curvature of the iron wire guide groove. Is preferred.

However, the new guides may be different in the radius of curvature of the iron wire guide groove. In this case, the guide 144 on the side that first receives the iron wire fed into the binding portion
It is preferable to replace the iron wire guide groove 152 with an appropriate guide so that the radius of curvature of the iron wire guide groove 152 is smaller than that of the iron wire guide groove 154 of the other guide 146.

When the size of the annular iron wire guide path formed by the iron wire guide groove is changed by exchanging only one guide, the iron wire guide groove 152 of the guide 144 on the side which first receives the fed iron wire is changed. It is preferable to select the guides so that the radius of curvature is smaller than the radius of curvature of the iron wire guide groove 154 of the other guide 146.

The guides of the iron wire guide means 140 do not have to have a structure in which the tips are brought into contact with each other at the time of binding as in the above embodiment, and the guides 170, 1 shown in FIG.
72, like the guides 174 and 176 shown in FIG. 10, the tip portions may be always separated so that an opening for receiving the intersecting portion of the reinforcing bars to be bound is always formed in the binding portion.

In the embodiment shown in FIG. 9, both guides 1
70 and 172 have substantially the same length and a substantially I shape. Therefore, both guides 170, 17
The binding portion 142 formed by 2 is always open to the front end side so as to receive the intersecting portion of the reinforcing bar from the front end side.

In the embodiment shown in FIG. 9, one guide 174 has a substantially C-shape, while the other guide 176 is shorter than the one guide 174. Therefore, the binding portion 1 formed by both guides 174 and 176.
42 always opens laterally to receive the intersection of the reinforcing bars from the side.

In both of the embodiments shown in FIGS. 9 and 10, the radius of curvature of the iron wire guide grooves of both guides may be the same, or the guides 170, on the side which first receives the iron wire fed into the binding portion 142, may be formed. The radius of curvature of the iron wire guide groove 130 of 174 is set to the iron wire guide groove 13 of the other guides 172 and 176.
The radius of curvature may be smaller than 2.

However, in the binding machine in which the binding portion is always open, if the radius of curvature of the iron wire guide groove of the guide that receives the iron wire first is made smaller than the radius of curvature of the iron wire guide grooves of the other guides, the radius of curvature is small. The iron wire fed out from the iron wire guide groove can be reliably received in the iron wire guide groove with a large radius of curvature,
Therefore, although there is a space between the iron wire guide grooves of both guides, it is possible to reliably form the loop of the iron wire extending around the binding portion of the reinforcing bar.

In any of the embodiments shown in FIGS. 9 and 10, at least one of the guides may be replaceable as in the embodiment shown in FIGS.
Both guides may be non-replaceable.

In any of the embodiments shown in FIGS. 9 and 10, at least one of the guides may be pivotally movable about the axis of the pin 150, and both guides are pivotally movable. It may be impossible.

However, in each of the embodiments shown in FIGS. 9 and 10, the binding portion is always open to receive the intersection of the reinforcing bars, and therefore the guide does not have to be pivoted. This eliminates the need for an opening / closing mechanism that causes the guide to perform a pivotal movement, which simplifies the structure.

In the case of the embodiment shown in FIG. 10, by locking the reinforcing bars to be bound inside the guides 174, the reinforcing bars can be positioned in the binding part 142, so that the guides 174 serve as positioning means. Can be used. When the reinforcing bars to be bound are separated from each other at the intersection, pulling the binding machine with the reinforcing bars to be bound inside the guide 174 forces the reinforcing bars to mutually cross at the intersection. Can be brought into contact with.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a usage state of a reinforcing bar binding machine of the present invention.

FIG. 2 is a vertical cross-sectional view of the vicinity of a first main body of the reinforcing bar binding machine of FIG.

FIG. 3 is a sectional view taken along line 3-3 in FIG.

FIG. 4 is a sectional view of a central portion in the longitudinal direction of the supporting means and the connecting means.

5 is a vertical cross-sectional view of the vicinity of a second main body of the reinforcing bar binding machine of FIG. 1. FIG.

FIG. 6 is a left side view of FIG.

FIG. 7 is a diagram showing an example of a twisting mechanism for twisting.

FIG. 8 is a sectional view showing an example of an iron wire guide groove.

FIG. 9 is a view showing another embodiment of the iron wire guide.

FIG. 10 is a view showing still another embodiment of the iron wire guide.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Reinforcing bar binding machine 12,14 Reinforcing bar to be bound 16 Iron wire 18 Supporting means 20,22 Main body 24 Coupling body 26 Gripping portion 28 Worker 30,30 Cylindrical member 34 Screw member 36 Male screw portion 40 Drive mechanism 42 Rotation source 62 Transmission means 64 iron wire feeding mechanism 66 twisting mechanism 72,74 transmitter 76,78 receiving member 80,82 shaft member 84 pin 86 slot 100 iron wire feeding roller 112 reel 140 guiding means 142 binding portion 144,146,170,172,174,176 iron wire Guides 152,154 Iron wire guide groove 156 Iron wire feed path 1158 Positioning member 162 Switch

Claims (6)

[Claims] 1. An iron wire feeding means for feeding an iron wire into a binding portion for binding the reinforcing bar by the iron wire, a guiding means for guiding the iron wire fed into the binding portion around the reinforcing bar, and a guide means around the reinforcing bar. Twisting means rotated around a first axis intersecting the reinforcing bar to twist the iron wire, driving means for operating the iron wire feeding means and the twisting means, the iron wire feeding means, the guiding means, the twisting Means and supporting means for supporting said drive means, said support means comprising at least a switch for controlling said drive means and a first body having at least one grip for an operator; A second body that supports the guiding means and the twisting means, and a tubular connecting body that is longer than the first and second bodies and that connects the first and second bodies. Reinforcing bar binding machine having a connecting body of. 2. The reinforcing bar binding machine according to claim 1, wherein the guide means is supported by an end portion of the second main body opposite to the first main body. 3. The transmission means further includes an elongated transmission means for transmitting the power of the driving means to the iron wire feeding means and the twisting means, the driving means being arranged in the first main body. The rebar tying machine according to claim 1 or 2, which extends in the longitudinal direction in the connected body. 4. The drive means includes a rotation source attached to the first main body, and first and second clutches that receive rotation of the rotation source, and the transmission means is configured to move within the coupling body. Elongated first and second transmission bodies are provided, and the first and second transmission bodies are respectively connected at one end to the output shafts of the first and second clutches and at the other end. The reinforcing bar binding machine according to claim 3, which is connected to the iron wire feeding means and the twisting means. 5. The first and second transmission bodies respectively extend in the longitudinal direction in the connection body.
A first shaft member and a second shaft member which are interconnected at one end but are capable of relative movement in the longitudinal direction but are not capable of relative rotation about the axis,
The connecting body has the first and second ends at one end.
A first tubular member fixed to either one of the main bodies of
A second tubular member fixed to either one of the first and second main bodies at one end and the other end of the first tubular member at the other end in the longitudinal direction. The rebar tying machine according to claim 4, further comprising a second tubular member movably received in the second tubular member, and a screw member releasably blocking relative displacement of the first and second members. 6. The switch according to claim 1, wherein the switch is arranged at a portion where an operator can operate the switch with a finger of a hand holding the grip portion. Rebar binding machine.