NZ762528A - Binding machine - Google Patents
Binding machine Download PDFInfo
- Publication number
- NZ762528A NZ762528A NZ762528A NZ76252820A NZ762528A NZ 762528 A NZ762528 A NZ 762528A NZ 762528 A NZ762528 A NZ 762528A NZ 76252820 A NZ76252820 A NZ 76252820A NZ 762528 A NZ762528 A NZ 762528A
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- NZ
- New Zealand
- Prior art keywords
- wires
- feeding
- guide
- wire
- engaging member
- Prior art date
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- 230000001939 inductive effect Effects 0.000 claims abstract description 39
- 238000006073 displacement reaction Methods 0.000 claims description 39
- 230000003014 reinforcing Effects 0.000 description 84
- 230000001105 regulatory Effects 0.000 description 16
- 238000005452 bending Methods 0.000 description 14
- 230000005540 biological transmission Effects 0.000 description 5
- 238000011144 upstream manufacturing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000002093 peripheral Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Abstract
A binding machine includes a wire feeding unit configured to feed a wire to be wound on an object to be bound, a binding unit configured to twist the wire wound on the object to be bound, a curl guide configured to curl the wire being fed by the wire feeding unit, and an inductive guide configured to guide the wire curled by the curl guide toward the binding unit. The wire feeding unit includes a pair of feeding members facing each other with a feeding path of the wire being interposed therebetween, each of the feeding members configured to rotate about a shaft as a support point extending in a direction intersecting with the feeding path of the wire, and a position regulation part configured to regulate axial relative positions of the pair of feeding members. o guide the wire curled by the curl guide toward the binding unit. The wire feeding unit includes a pair of feeding members facing each other with a feeding path of the wire being interposed therebetween, each of the feeding members configured to rotate about a shaft as a support point extending in a direction intersecting with the feeding path of the wire, and a position regulation part configured to regulate axial relative positions of the pair of feeding members.
Description
BINDING MACHINE
TECHNICAL FIELD
The present disclosure relates to a binding machine configured to bind an object to
be bound such as a reinforcing bar with a wire.
BACKGROUND ART
In the related art, a binding machine called as a reinforcing bar binding machine
configured to wind a wire on two or more reinforcing bars, and to bind the two or more
reinforcing bars with the wire by twisting the wire wound on the reinforcing bars is suggested.
In the binding machine, wires are sandwiched between a pair of feeding members,
and the wires are fed by a rotating operation of the feeding members. The pair of feeding
members each has a groove portion on an outer peripheral surface thereof, and the wires are
sandwiched by the groove portions (for example, refer to WO2017/014266).
SUMMARY OF DISCLOSURE
The pair of feeding members is configured to be movable toward and away from
each other so as to mount the wires thereto. If axial relative positions of the pair of feeding
members are displaced, the wires unevenly come into contact with a part of the groove portions,
so that the groove portions are unevenly worn. When the groove portions are unevenly worn,
the wires may not be normally fed.
The present disclosure has been made in view of the above situations, and an object
thereof is to provide a binding machine configured to regulate axial relative positions of a pair
of feeding members.
In order to achieve the above object, the present disclosure provides a binding
machine including a wire feeding unit configured to feed a wire to be wound on an object to be
bound, a binding unit configured to twist the wire wound on the object to be bound, a curl guide
configured to curl the wire being fed by the wire feeding unit, and an inductive guide configured
to guide the wire curled by the curl guide toward the binding unit, wherein the wire feeding unit
includes a pair of feeding members facing each other with a feeding path of the wire being
interposed therebetween and each configured to rotate about a shaft as a support point in a
direction intersecting with the feeding path of the wire, and a position regulation part configured
to regulate axial relative positions of the pair of feeding members.
In the present disclosure, the axial positions of the pair of feeding members can be
maintained in preset positions in a state in which the wire is sandwiched between one feeding
member and the other feeding member.
According to the present disclosure, it is possible to feed the wire in a state in which
the axial positions of the pair of feeding members are maintained in the preset positions.
Thereby, it is possible to suppress occurrence of a feeding trouble of the wire due to uneven
wears of the feeding members.
BRIEF DESCRIPTION OF DRAWINGS
is a configuration view depicting an example of an entire configuration of a
reinforcing bar binding machine, as seen from a side.
is a configuration view depicting an example of a main configuration of the
reinforcing bar binding machine, as seen from a side.
is a partially broken perspective view depicting an example of the main
configuration of the reinforcing bar binding machine.
is a configuration view depicting an example of the entire configuration of
the reinforcing bar binding machine, as seen from front.
is a sectional view taken along a line A-A in
is a side view depicting an outer shape of the reinforcing bar binding machine.
is a top view depicting the outer shape of the reinforcing bar binding machine.
is a front view depicting the outer shape of the reinforcing bar binding
machine.
is a front view depicting an example of a wire feeding unit.
is a plan view depicting an example of the wire feeding unit.
is a side view depicting an example of the wire feeding unit.
is a sectional view taken along a line AA-AA in .
is an enlarged view of main parts of .
is a front view depicting an example of the wire feeding unit.
is a sectional view depicting an example of the wire feeding unit.
is an enlarged view of main parts of .
is a plan view depicting an inductive guide of a first embodiment.
is a perspective view depicting the inductive guide of the first embodiment.
is a front view depicting the inductive guide of the first embodiment.
is a side view depicting the inductive guide of the first embodiment.
is a sectional view taken along a line B-B in .
is a sectional view taken along a line D-D in .
is a broken perspective view depicting the inductive guide of the first
embodiment.
A is a sectional plan view depicting an example of a binding unit and a drive
unit.
B is a sectional plan view depicting an example of the binding unit and the
drive unit.
C is a sectional side view depicting an example of the binding unit and the
drive unit.
A illustrates an example of an operation of binding reinforcing bars with
wires.
B illustrates an example of the operation of binding reinforcing bars with
wires.
C illustrates an example of the operation of binding reinforcing bars with
wires.
D illustrates an example of the operation of binding reinforcing bars with
wires.
E illustrates an example of the operation of binding reinforcing bars with
wires.
A illustrates movement of the wires in the inductive guide of the first
embodiment.
B illustrates movement of the wires in the inductive guide of the first
embodiment.
C illustrates movement of the wires in the inductive guide of the first
embodiment.
A illustrates an engaged state of the wires in an engaging member.
B illustrates an engaged state of the wires in the engaging member.
C illustrates an engaged state of the wires in the engaging member.
A illustrates movement of the wires in a feeding regulation unit.
B illustrates movement of the wires in the feeding regulation unit.
A is a front view depicting an example of a wire feeding unit.
B is a sectional view depicting an example of the wire feeding unit.
C is an enlarged view of main parts of B.
DETAILED DESCRIPTION OF EMBODIMENTS
Hereinbelow, an example of a reinforcing bar binding machine as an embodiment of
the binding machine of the present disclosure will be described with reference to the drawings.
<Example of Reinforcing Bar Binding Machine>
is a view depicting an example of an entire structure of a reinforcing bar
binding machine, as seen from a side, is a view depicting an example of a main structure
of the reinforcing bar binding machine, as seen from a side, is a partially broken
perspective view depicting an example of the main structure of the reinforcing bar binding
machine, is a view depicting an example of the entire structure of the reinforcing bar
binding machine, as seen from front, and is a sectional view taken along a line A-A in
Also, is a side view depicting an outer shape of the reinforcing bar binding
machine, is a top view depicting the outer shape of the reinforcing bar binding machine,
and is a front view depicting the outer shape of the reinforcing bar binding machine.
A reinforcing bar binding machine 1A is configured to feed wires W in a forward
direction denoted with an arrow F, to wind the wires around reinforcing bars S, which are an
object to be bound, to feed the wires W wound around the reinforcing bars S in a reverse
direction denoted with an arrow R, to wind the wires on the reinforcing bars S, and to twist the
wires W, thereby binding the reinforcing bars S with the wires W.
In order to realize the above functions, the reinforcing bar binding machine 1A
includes a magazine 2A in which the wires W are accommodated, and a wire feeding unit 3A
configured to feed the wires W. Also, the reinforcing bar binding machine 1A includes a first
wire guide 4A configured to guide the wires W that are to be fed into the wire feeding unit 3A
and a second wire guide 4A configured to guide the wires W that are to be delivered from the
wire feeding unit 3A, in an operation of feeding the wires W in the forward direction by the
wire feeding.
Also, the reinforcing bar binding machine 1A includes a curl forming unit 5A
configured to form a path along which the wires W fed by the wire feeding unit 3A are to be
wound around the reinforcing bars S. Also, the reinforcing bar binding machine 1A includes
a cutting unit 6A configured to cut the wires W wound on the reinforcing bars S during an
operation of feeding the wires W in the reverse direction by the wire feeding unit 3A, a binding
unit 7A configured to twist the wires W wound on the reinforcing bars S, and a drive unit 8A
configured to drive the binding unit 7A.
The magazine 2A is an example of an accommodation unit in which a reel 20 on
which the long wires W are wound to be reeled out is rotatably and detachably accommodated.
For the wire W, a wire made of a plastically deformable metal wire, a wire having a metal wire
covered with a resin, a twisted wire and the like are used.
The reel 20 has a cylindrical hub part 21 on which the wires W are wound, and a pair
of flange parts 22 and 23 provided integrally on both axial ends of the hub part 21. The flange
parts 22 and 23 each have a substantially circular plate shape having a larger diameter than the
hub part 21, and are provided coaxially with the hub part 21. The reel 20 is configured so that
two wires W are wound on the hub part 21 and can be reeled out from the reel 20 at the same
time.
As shown in FIGS. 4A and 4B, the magazine 2A is mounted with the reel 20 with
being offset in one direction along an axis direction of the reel 20 following an axial direction
of the hub part 21 with respect to a feeding path FL of the wires W defined by the first wire
guide 4A and the second wire guide 4A . In the present example, the entire hub part 21 of
the reel 20 is offset in one direction with respect to the feeding path FL of the wires W.
is a front view depicting an example of the wire feeding unit, is a
plan view depicting an example of the wire feeding unit, is a side view depicting an
example of the wire feeding unit. is a sectional view taken along a line AA-AA in , and is an enlarged view of main parts of . Subsequently, a structure of
the wire feeding unit 3A is described. The wire feeding unit 3A includes, as a pair of feeding
members configured to sandwich and feed two wires W aligned in parallel, a first feeding gear
30L and a second feeding gear 30R configured to feed the wires W by a rotating operation.
The first feeding gear 30L has a tooth part 31L configured to transmit a drive force.
In the present example, the tooth part 31L has a spur gear shape, and is formed on an entire
circumference of an outer periphery of the first feeding gear 30L. Also, the first feeding gear
30L has a groove portion 32L into which the wire W is to enter. In the present example, the
groove portion 32L is a concave portion of which a sectional shape is a substantial V shape, and
is formed on the entire circumference of the outer periphery of the first feeding gear 30L along
a circumferential direction.
The second feeding gear 30R has a tooth part 31R configured to transmit a drive
force. In the present example, the tooth part 31R has a spur gear shape, and is formed on an
entire circumference of an outer periphery of the second feeding gear 30R. Also, the second
feeding gear 30R has a groove portion 32R into which the wire W is to enter. In the present
example, the groove portion 32R is a concave portion of which a sectional shape is a substantial
V shape, and is formed on the entire circumference of the outer periphery of the second feeding
gear 30R along a circumferential direction.
In the wire feeding unit 3A, the groove portion 32L of the first feeding gear 30L and
the groove portion 32R of the second feeding gear 30R are arranged to face each other, so that
the first feeding gear 30L and the second feeding gear 30R are provided with the feeding path
FL of the wires W defined by the first wire guide 4A and the second wire guide 4A being
interposed therebetween. The feeding path FL of the wires W becomes a width center position
of the wire feeding unit 3A configured by the pair of first feeding gear 30L and the second
feeding gear 30R. As shown in and the like, the reel 20 is arranged with being offset
in one direction with respect to the width center position of the wire feeding unit 3A.
The wire feeding unit 3A is configured so that the first feeding gear 30L and the
second feeding gear 30R can be displaced toward and away from each other. In the present
example, the second feeding gear 30R is displaced relative to the first feeding gear 30L.
Therefore, the first feeding gear 30L is rotatably supported to a support member 301
of the wire feeding unit 3A by a shaft 300L. The first feeding gear 30L is configured to rotate
about a shaft 300L as a support point in a direction intersecting with the feeding path FL of the
wires W defined by the first wires guide 4A and the second wires guide 4A . Also, the wire
feeding unit 3A has a first displacement member 36 configured to displace the second feeding
gear 30R toward and away from the first feeding gear 30L. The first displacement member
36 is configured to rotatably support the second feeding gear 30R at one end portion-side by a
shaft 300R. The second feeding gear 30R is configured to rotate about the shaft 300R as a
support point in a direction intersecting with the feeding path FL of the wires W defined by the
first wires guide 4A and the second wires guide 4A . Also, the other end portion of the first
displacement member 36 is supported to the support member 301 so as to be rotatable about a
shaft 36a as a support point.
The wire feeding unit 3A includes a second displacement member 37 configured to
displace the first displacement member 36. The second displacement member 37 is coupled
on one end portion-side to the first displacement member 36. Also, the second displacement
member 37 is coupled on the other end portion-side to a spring 38. Also, the second
displacement member 37 is supported to the support member 301 between one end portion-side
and the other end portion-side so as to be rotatable about a shaft 37a serving as a support point.
[0026] The first displacement member 36 is pressed via the second displacement member
37 by the spring 38, and is displaced in a direction of an arrow V1 by a rotating operation about
the shaft 36a serving as a support point. Thereby, the second feeding gear 30R is pressed
toward the first feeding gear 30L by a force of the spring 38.
In a state in which the two wires W are mounted between the first feeding gear 30L
and the second feeding gear 30R, the wires W are sandwiched between the groove portion 32L
of the first feeding gear 30L and the groove portion 32R of the second feeding gear 30R in such
an aspect that one wire W is put in the groove portion 32L of the first feeding gear 30L and the
other wire W is put in the groove portion 32R of the second feeding gear 30R.
In the wire feeding unit 3A, the tooth part 31L of the first feeding gear 30L and the
tooth part 31R of the second feeding gear 30R are in mesh with each other in a state in which
the wires W are sandwiched between the groove portion 32L of the first feeding gear 30L and
the groove portion 32R of the second feeding gear 30R. Thereby, the drive force is transmitted
between the first feeding gear 30L and the second feeding gear 30R by rotation.
In the wire feeding unit 3A of the present example, the first feeding gear 30L is a
drive side, and the second feeding gear 30R is a driven side.
The first feeding gear 30L is configured to rotate as a rotating operation of a feeding
motor (not shown) is transmitted thereto. The second feeding gear 30R is configured to rotate
in conjunction with the first feeding gear 30L as a rotating operation of the first feeding gear
30L is transmitted thereto through engagement between the tooth part 31L and the tooth part
31R.
Thereby, the wire feeding unit 3A is configured to feed the wires W sandwiched
between the first feeding gear 30L and the second feeding gear 30R along an extension direction
of the wires W. In the structure of feeding the two wires W, the two wires W are fed with
being aligned in parallel by a frictional force that is generated between the groove portion 32L
of the first feeding gear 30L and one wire W, a frictional force that is generated between the
groove portion 32R of the second feeding gear 30R and the other wire W, and a frictional force
that is generated between one wire W and the other wire W.
[0032] The wire feeding unit 3A is configured so that the rotation directions of the first
feeding gear 30L and the second feeding gear 30R are switched and the feeding direction of the
wires W is switched between the forward and reverse directions by switching the rotation
direction of the feeding motor (not shown) between the forward and reverse directions.
The first displacement member 36 has a position regulation part 36L1 configured to
regulate an axial position of the first feeding gear 30L with respect to the second feeding gear
30R. The position regulation part 36L1 is an example of one position regulation part,
protrudes from the first displacement member 36 toward the first feeding gear 30L, is provided
at a part facing one surface 30L1 positioned in an axial direction of the first feeding gear 30L,
and is in contact with one surface 30L1 of the first feeding gear 30L.
The first displacement member 36 has a position regulation part 36R1 configured to
regulate an axial position of the second feeding gear 30R. The position regulation part 36L1
is configured to regulate an axial position of the first feeding gear 30L from one surface 30L1-
side of the first feeding gear 30L. In contrast, the position regulation part 36R1 that is an
example of the other position regulation part is configured to regulate an axial position of the
second feeding gear 30R from an opposite surface-side to the first feeding gear 30L.
Therefore, the position regulation part 36R1 is provided at a part facing the other surface 30R1
positioned in an axial direction of the second feeding gear 30R and is in contact with the other
surface 30R1 of the second feeding gear 30R. In the meantime, the position regulation part
configured to regulate an axial position of the second feeding gear 30R may also be provided
at a part facing the other surface positioned in the axial direction of the second feeding gear
30R.
is a front view depicting an example of the wire feeding unit, is a
sectional view depicting an example of the wire feeding unit, and is an enlarged view
of main parts of . Subsequently, a state in which the first feeding gear 30R is moved
away from the first feeding gear 30L and the wires W can be thus mounted is described.
When the other end portion-side of the second displacement member 37 is pushed,
the spring 38 is compressed, the second displacement member 37 is rotated about the shaft 37a
as a support point, and one end portion is moved in a direction of an arrow V2. Thereby, the
first displacement member 36 coupled to the second displacement member 37 is displaced in
the direction of the arrow V2 by a rotating operation about the shaft 36a as a support point, and
the second feeding gear 30R is moved away from the first feeding gear 30L. Therefore, a
space in which the wires W can be inserted/extracted is formed between the first feeding gear
30L and the second feeding gear 30R.
[0037] In this way, the second displacement member 37 serves as a release lever for
receiving the operation of moving the second feeding gear 30R away from the first feeding gear
30L. Also, in a state in which the second feeding gear 30R is moved to a predetermined
position distant from the first feeding gear 30L, an engaging mechanism (not shown) configured
to regulate movement of the second displacement member 37 is provided, and the state in which
the space in which the wires W can be inserted/extracted is formed between the first feeding
gear 30L and the second feeding gear 30R can be thus maintained. Also, when an engaged
state of the second displacement member 37 by the engaging mechanism (not shown) is
released, the second displacement member 37 is pressed by the spring 38, and the first
displacement member 36 is pressed via the second displacement member 37 by the spring 38
and is thus displaced in a direction of an arrow V1 by the rotating operation about the shaft 36a
as a support point. Thereby, the second feeding gear 30R is pressed toward the first feeding
gear 30L by force of the spring 38.
An axial position of the first feeding gear 30L is regulated from one surface 30L1-
side of the first feeding gear 30L by the position regulation part 36L1 provided to the first
displacement member 36. Also, an axial position of the second feeding gear 30R is regulated
from the other surface 30R1-side of the second feeding gear 30R, which is opposite to the first
feeding gear 30L, by the position regulation part 36R1 provided to the first displacement
member 36.
[0039] Thereby, the axial positions of the first feeding gear 30L and the second feeding gear
30R configured to be displaced in a contact/separation direction with respect to the first feeding
gear 30L are primarily determined by the first displacement member 36. Therefore, it is
possible to maintain the axial positions of the first feeding gear 30L and the second feeding gear
30R in preset positions in a state in which the two wires W are sandwiched between the groove
portion 32L of the first feeding gear 30L and the groove portion 32R of the second feeding gear
30R.
Therefore, it is possible to feed the two wires in a state in which the axial positions
of the first feeding gear 30L and the second feeding gear 30R are maintained in preset positions.
Thereby, it is possible to suppress occurrence of a feeding trouble of the wires due to uneven
wears of the groove portion 32L of the first feeding gear 30L and the groove portion 32R of the
second feeding gear 30R.
Subsequently, the wire guide configured to guide the feeding of the wires W is
described. As shown in , the first wire guide 4A is arranged upstream of the first
feeding gear 30L and the second feeding gear 30R with respect to the feeding direction of the
wires W to be fed in the forward direction. Also, the second wire guide 4A is arranged
downstream of the first feeding gear 30L and the second feeding gear 30R with respect to the
feeding direction of the wires W to be fed in the forward direction.
The first wire guide 4A and the second wire guide 4A each have a guide hole 40A
through which the wires W are to pass. The guide hole 40A has a shape for regulating a radial
position of the wire W. In the reinforcing bar binding machine 1A, a path of the wires W that
are fed by the wire feeding unit 3A is regulated by the curl forming unit 5A, so that a locus of
the wires W becomes a loop Ru as shown with a broken line in and the wires W are thus
wound around the reinforcing bars S.
When a direction intersecting with a radial direction of the loop Ru to be formed by
the wires W is set as an axial direction, the guide holes 40A of the first wire guide 4A and the
second wire guide 4A are respectively formed so that the two wires W are to pass therethrough
with being aligned in parallel along the axial direction of the loop Ru. In the meantime, the
direction in which the two wires W are aligned in parallel is also a direction in which the first
feeding gear 30L and the second feeding gear 30R are arranged.
The first wire guide 4A and the second wire guide 4A have the guide holes 40A
provided on the feeding path L of the wires W to pass between the first feeding gear 30L and
the second feeding gear 30R. The first wire guide 4A is configured to guide the wires W to
pass through the guide hole 40A to the feeding path L between the first feeding gear 30L and
the second feeding gear 30R.
The first wire guide 4A and the second wire guide 4A have a wire introduction part,
respectively, which is provided upstream of the guide hole 40A with respect to the feeding
direction of the wires W to be fed in the forward direction and has a tapered shape of which an
opening area is larger than a downstream side, such as a conical shape, a pyramid shape or the
like. Thereby, the wires W can be easily introduced into the first wire guide 4A and the
second wire guide 4A .
Subsequently, the curl forming unit 5A configured to form the feeding path of the
wires W along which the wires W are to be wound around the reinforcing bars S is described.
The curl forming unit 5A includes a curl guide 50 configured to curl the wires W that are fed
by the first feeding gear 30L and the second feeding gear 30R, and an inductive guide 51A
configured to guide the wires W curled by the curl guide 50 toward the binding unit 7A.
The curl guide 50 has a guide groove 52 configuring the feeding path of the wires W,
and a first guide pin 53a, a second guide pin 53b and a third guide pin 53c serving as a guide
member for curling the wires W in cooperation with the guide groove 52. The curl guide 50
has such a structure that a guide plate 50L, a guide plate 50C and a guide plate 50R are stacked,
and a guide surface of the guide groove 52 is configured by the guide plate 50C. Also,
sidewall surfaces that are upright from the guide surface of the guide groove 52 is configured
by the guide plates 50L and 50R.
[0048] The first guide pin 53a is provided on an introduction part-side of the curl guide 50,
to which the wires W being fed in the forward direction by the first feeding gear 30L and the
second feeding gear 30R are introduced. The first guide pin 53a is arranged on a radially inner
side of the loop Ru to be formed by the wires W with respect to the feeding path of the wires
W configured by the guide groove 52. The first guide pin 53a is configured to regulate the
feeding path of the wires W so that the wires W being fed along the guide groove 52 do not
enter the radially inner side of the loop Ru to be formed by the wires W.
The second guide pin 53b is provided between the first guide pin 53a and the third
guide pin 53c. The second guide pin 53b is arranged on a radially outer side of the loop Ru to
be formed by the wires W with respect to the feeding path of the wires W configured by the
guide groove 52. A part of a circumferential surface of the second guide pin 53b protrudes
from the guide groove 52. Thereby, the wires W that are guided by the guide groove 52 come
into contact with the second guide pin 53b at a part at which the second guide pin 53b is
provided.
[0050] The third guide pin 53c is provided on a discharge part-side of the curl guide 50,
from which the wires W being fed in the forward direction by the first feeding gear 30L and the
second feeding gear 30R are discharged. The third guide pin 53c is arranged on a radially
outer side of the loop Ru to be formed by the wires W with respect to the feeding path of the
wires W configured by the guide groove 52. A part of a circumferential surface of the third
guide pin 53c protrudes from the guide groove 52. Thereby, the wires W that are guided by
the guide groove 52 come into contact with the third guide pin 53c at a part at which the third
guide pin 53c is provided.
The curl forming unit 5A includes a retraction mechanism 53 configured to retract
the first guide pin 53a. The retraction mechanism 53 is configured to retract the first guide
pin 53a from a moving path of the wires W wound on the reinforcing bars S by an operation of
moving laterally the first guide pin 53a with respect to an axial direction of the first guide pin
53a to feed the wires W in the reverse direction by the first feeding gear 30L and the second
feeding gear 30R.
Subsequently, an operation of curling the wires W is described. The wires W that
are fed in the forward direction by the first feeding gear 30L and the second feeding gear 30R
are curled in a loop shape as the radial position of the loop Ru to be formed by the wires W is
regulated at least at three points of two points on the radially outer side of the loop Ru to be
formed by the wires W and one point on the radially inner side between the two points.
In the present example, a radially outer position of the loop Ru to be formed by the
wires W is regulated at two points of the second wire guide 4A provided upstream of the first
guide pin 53a and the third guide pin 53c provided downstream of the first guide pin 53a with
respect to the feeding direction of the wires W that are fed in the forward direction. Also, a
radially inner position of the loop Ru to be formed by the wires W is regulated by the first guide
pin 53a. Thereby, the wires W that are fed in the forward direction by the first feeding gear
30L and the second feeding gear 30R are curled in a loop shape.
In the meantime, in the radially outer position of the loop Ru to be formed by the
wires W, the guide groove 52 in a position in which the wires W being fed to the third guide
pin 53c is contacted is provided with the second guide pin 53b, so that the wear of the guide
groove 52 can be prevented.
is a plan view depicting an inductive guide of a first embodiment,
is a perspective view depicting the inductive guide of the first embodiment, is a front
view depicting the inductive guide of the first embodiment, and is a side view depicting
the inductive guide of the first embodiment. Also, is a sectional view taken along a
line B-B in , is a sectional view taken along a line D-D in , and is a broken perspective view depicting the inductive guide of the first embodiment.
Subsequently, an inductive guide 51A of a first embodiment is described. As shown
in , the inductive guide 51A is provided in a position offset in the other direction that
is an opposite direction to the one direction in which the reel 20 is offset, with respect to the
feeding path FL of the wires W defined by the first wire guide 4A and the second wire guide
4A .
The inductive guide 51A has a first guide part 55 configured to regulate an axial
position of the loop Ru to be formed by the wires W curled by the curl guide 50 and a second
guide part 57 configured to regulate a radial position of the loop Ru to be formed by the wires
The first guide part 55 is provided on an introduction-side to which the wires W
curled by the curl guide 50 are to be introduced, with respect to the second guide part 57. The
first guide part 55 has a side surface part 55L provided on one side that is a side on which the
reel 20 is positioned with being offset in one direction. Also, the first guide part 55 has a side
surface part 55R facing the side surface part 55L and provided on the other side that is a side
located in an opposite direction to one direction in which the reel 2 is offset. Also, the first
guide part 55 has a bottom surface part 55D on which the side surface part 55L is erected on
one side thereof and the side surface part 55R is erected on the other side thereof, the bottom
surface part 55D connecting the side surface part 55L and the side surface part 55R.
The second guide part 57 has a guide surface 57a provided on a radially outer side of
the loop Ru to be formed by the wires W and configured by a surface extending toward the
binding unit 7A along the feeding direction of the wires W.
The side surface part 55L on one side of the first guide part 55 has a first guiding part
55L1 configured to guide the wires W to the guide surface 57a of the second guide part 57 and
a second guiding part 55L2 configured to guide the wires W along the guide surface 57a.
The side surface part 55R on the other side of the first guide part 55 has a third
guiding part 55R1 configured to guide the wires W to the guide surface 57a of the second guide
part 57 and a fourth guiding part 55R2 configured to guide the wires W along the guide surface
57a.
The inductive guide 51A configures a converging passage 55S by a space surrounded
by the pair of side surface parts 55L and 55R and the bottom surface part 55D. Also, the
inductive guide 51A is formed with an opening end portion 55E1 from which the wires W are
to be introduced into the converging passage 55S. The opening end portion 55E1 is an end
portion of the first guide part 55 on a side distant from the second guide part 57, and is opened
toward the space surrounded by the pair of side surface parts 55L and 55R and the bottom
surface part 55D.
[0063] The first guide part 55 is formed so that an interval between the first guiding part
55L1 and the third guiding part 55R1 gradually decreases from the opening end portion 55E1
toward the guide surface 57a of the second guide part 57. Thereby, the first guide part 55 is
formed so that the interval between the first guiding part 55L1 and the third guiding part 55R1
is greatest between an opening end portion 55EL1 of the first guiding part 55L1 and an opening
end portion 55ER1 of the third guiding part 55R1, which are located at the opening end portion
55E1.
Also, the first guide part 55 is formed so that the second guiding part 55L2 connecting
to the first guiding part 55L1 is located on one side of the guide surface 57a of the second guide
part 57 and the fourth guiding part 55R2 connecting to the third guiding part 55R1 is located
on the other side of the guide surface 57a. The second guiding part 55L2 and the fourth
guiding part 55R2 face in parallel to each other with a predetermined interval equal to or greater
than a radial width of two wires W aligned in parallel.
Thereby, the interval between the first guiding part 55L1 and the third guiding part
55R1 is narrowest at a part at which the first guiding part 55L1 connects to the second guiding
part 55L2 and the third guiding part 55R1 connects to the fourth guiding part 55R2. Therefore,
the part at which the first guiding part 55L1 and the second guiding part 55L2 connect each
other becomes a narrowest part 55EL2 of the first guiding part 55L1 with respect to the third
guiding part 55R1. Also, the part at which the third guiding part 55R1 and the fourth guiding
part 55R2 connect each other becomes a narrowest part 55ER2 of the third guiding part 55R1
with respect to the first guiding part 55L1.
Thereby, the inductive guide 51A is formed so that a part between the narrowest part
55EL2 of the first guiding part 55L1 and the narrowest part 55ER2 of the third guiding part
55R1 becomes a narrowest part 55E2 of the converging passage 55S. The inductive guide
51A is formed so that a cross-sectional area of the converging passage 55S gradually decreases
from the opening end portion 55E1 toward the narrowest part 55E2 along an entry direction of
the wires W.
The inductive guide 51A has an entry angle regulation part 56A configured to change
an entry angle of the wires W entering the converging passage 55S so as to face toward the
narrowest part 55E2.
In the reinforcing bar binding machine 1A, the reel 20 is arranged with being offset
in one direction. The wires W that are fed from the reel 20 offset in one direction by the wire
feeding unit 3A and are curled by the curl guide 50 are directed toward the other direction that
is an opposite direction to one direction in which the reel 20 is offset.
For this reason, the wires W to enter the converging passage 55S between the side
surface part 55L and the side surface part 55R of the first guide part 55 first enters toward the
third guiding part 55R1 of the side surface part 55R. Tip ends of the wires W entering toward
the third guiding part 55R1 of the side surface part 55R are directed toward between the
narrowest part 55EL2 of the first guiding part 55L1 and the narrowest part 55ER2 of the third
guiding part 55R1, i.e., toward the narrowest part 55E2 of the converging passage 55S.
Therefore, the first guiding part 55L1 of the side surface part 55L facing the side surface part
55R is provided with the entry angle regulation part 56A.
The entry angle regulation part 56A is provided in a position protruding toward an
inner side of a virtual line interconnecting the opening end portion 55E1 of the converging
passage 55S and the narrowest part 55E2, in the present example, a virtual line 55EL3
interconnecting the opening end portion 55E1 of the converging passage 55S and the narrowest
part 55E2, the inner side being located closer to the side surface part 55R than the virtual line
55EL3. In the present example, the entry angle regulation part 56A has such a shape that an
intermediate portion of the first guiding part 55L1 between the opening end portion 55EL1 and
the narrowest part 55EL2 is made convex toward the third guiding part 55R1. Thereby, the
first guiding part 55L1 has a bent shape, as seen from top ().
The wires curled by the curl guide 50 are introduced between the pair of side surface
parts 55L and 55R of the first guide part 55. The inductive guide 51A is configured to regulate
an axial position of the loop Ru to be formed by the wires W by the first guiding part 55L1 and
the third guiding part 55R1 of the first guide part 55 and to guide the same to the guide surface
57a of the second guide part 57.
Also, the inductive guide 51A is configured to regulate an axial position of the loop
Ru to be formed by the wires W guided to the guide surface 57a of the second guide part 57 by
the second guiding part 55L2 and the fourth guiding part 55R2 of the first guide part 55, and to
regulate a radial position of the loop Ru to be formed by the wires W by the guide surface 57a
of the second guide part 57.
In the inductive guide 51A of the present example, the second guide part 57 is fixed
to a main body part 10A of the reinforcing bar binding machine 1A, and the first guide part 55
is fixed to the second guide part 57. In the meantime, the first guide part 55 may be supported
to the second guide part 57 in a state in which it can rotate about a shaft 55b as a support point.
In this structure, the first guide part 55 is configured to be openable/closable in directions of
contacting and separating with respect to the curl guide 50 in a state in which the opening end
portion 55E1-side is urged toward the curl guide 50 by a spring (not shown). Thereby, after
binding the reinforcing bars S with the wires W, the first guide part 55 is retracted by an
operation of pulling out the reinforcing bar binding machine 1A from the reinforcing bars S, so
that the reinforcing bar binding machine 1A can be easily pulled out from the reinforcing bars
[0074] Subsequently, the cutting unit 6A configured to cut the wires W wound on the
reinforcing bars S is described. The cutting unit 6A includes a fixed blade part 60, a movable
blade part 61 configured to cut the wires W in cooperation with the fixed blade part 60, and a
transmission mechanism 62 configured to transmit an operation of the binding unit 7A to the
movable blade part 61. The fixed blade part 60 has an opening 60a through which the wires
W are to pass, and an edge portion provided at the opening 60a and capable of cutting the wires
The movable blade part 61 is configured to cut the wires W passing through the
opening 60a of the fixed blade part 60 by a rotating operation about the fixed blade part 60,
which is a support point. The transmission mechanism 62 is configured to transmit an
operation of the binding unit 7A to the movable blade part 61 and to rotate the movable blade
part 61 in conjunction with an operation of the binding unit 7A, thereby cutting the wires W.
The fixed blade part 60 is provided downstream of the second wire guide 4A with
respect to the feeding direction of the wires W that are fed in the forward direction, and the
opening 60a configures a wire guide.
FIGS. 10A and 10B are plan views depicting an example of the binding unit and the
drive unit, and C is a side view depicting an example of the binding unit and the drive
unit. In the below, the binding unit 7A configured to bind the reinforcing bars S with the wires
W and the drive unit 8A configured to drive the binding unit 7A are described.
[0078] The binding unit 7A includes an engaging member 70 to which the wires W are to be
engaged, an actuating member 71 configured to open/close the engaging member 70, and a
rotary shaft 72 for actuating the engaging member 70 and the actuating member 71.
The engaging member 70 includes a first movable engaging member 70L, a second
movable engaging member 70R, and a fixed engaging member 70C. The engaging member
70 is configured so that a tip end-side of the first movable engaging member 70L is positioned
on one side with respect to the fixed engaging member 70C and a tip end-side of the second
movable engaging member 70R is positioned on the other side with respect to the fixed
engaging member 70C.
The engaging member 70 is configured so that rear ends of the first movable
engaging member 70L and the second movable engaging member 70R are supported to the
fixed engaging member 70C so as to be rotatable about a shaft 76. Thereby, the engaging
member 70 opens/closes in directions in which the tip end-side of the first movable engaging
member 70L contacts and separates with respect to the fixed engaging member 70C by a
rotating operation about the shaft 76 as a support point. Also, the engaging member
opens/closes in directions in which the tip end-side of the second movable engaging member
70R contacts and separates with respect to the fixed engaging member 70C.
The actuating member 71 and the rotary shaft 72 are configured so that a rotating
operation of the rotary shaft 72 is converted into movement of the actuating member 71 in a
front and rear direction along an axial direction of the rotary shaft 72 shown with arrows A1
and A2 by a screw part provided on an outer periphery of the rotary shaft 72 and a screw part
provided on an inner periphery of the actuating member 71. The actuating member 71 has an
opening/closing pin 71a for opening/closing the first movable engaging member 70L and the
second movable engaging member 70R.
The opening/closing pin 71a is inserted in opening/closing guide holes 73 formed in
the first movable engaging member 70L and the second movable engaging member 70R. The
opening/closing guide hole 73 extends in a moving direction of the actuating member 71, and
has a shape of converting linear movement of the opening/closing pin 71a moving in
conjunction with the actuating member 71 into an opening/closing operation by rotation of the
first movable engaging member 70L and the second movable engaging member 70R about the
shaft 76 as a support point. In FIGS. 10A and 10B, the opening/closing guide hole 73 formed
in the first movable engaging member 70L is shown. However, the second movable engaging
member 70R is also provided with the similar opening/closing guide hole 73 having a bilaterally
symmetrical shape.
[0083] In the binding unit 7A, a side on which the engaging member 70 is provided is
referred to as a front side, and a side on which the actuating member 71 is provided is referred
to as a rear side. The engaging member 70 is configured so that, when the actuating member
71 is moved rearward (refer to the arrow A2), the first movable engaging member 70L and the
second movable engaging member 70R move away from the fixed engaging member 70C by a
rotating operation about the shaft 76 as a support point, due to a locus of the opening/closing
pin 71a and a shape of the opening/closing guide hole 73, as shown in A.
Thereby, the first movable engaging member 70L and the second movable engaging
member 70A are opened with respect to the fixed engaging member 70C, so that a feeding path
through which the wires W are to pass is formed between the first movable engaging member
70L and the fixed engaging member 70C and between the second movable engaging member
70R and the fixed engaging member 70C.
In a state in which the first movable engaging member 70L and the second movable
engaging member 70R are opened with respect to the fixed engaging member 70C, the wires
W that are fed by the first feeding gear 30L and the second feeding gear 30R are guided to the
first wire guide 4A and the second wire guide 4A and passes between the fixed engaging
member 70C and the first movable engaging member 70L. The wires W passing between the
fixed engaging member 70C and the first movable engaging member 70L are guided to the curl
forming unit 5A. Also, the wires W curled by the curl forming unit 5A and guided to the
binding unit 7A passes between the fixed engaging member 70C and the second movable
engaging member 70R.
The engaging member 70 is configured so that, when the actuating member 71 is
moved in the forward direction denoted with the arrow A1, the first movable engaging member
70L and the second movable engaging member 70R move toward the fixed engaging member
70C by the rotating operation about the shaft 76 as a support point, due to the locus of the
opening/closing pin 71a and the shape of the opening/closing guide hole 73, as shown in B. Thereby, the first movable engaging member 70L and the second movable engaging
member 70A are closed with respect to the fixed engaging member 70C.
When the first movable engaging member 70L is closed with respect to the fixed
engaging member 70C, the wires W sandwiched between the first movable engaging member
70L and the fixed engaging member 70C are engaged in such an aspect that the wires can move
between the first movable engaging member 70L and the fixed engaging member 70C. Also,
when the second movable engaging member 70R is closed with respect to the fixed engaging
member 70C, the wires W sandwiched between the second movable engaging member 70R and
the fixed engaging member 70C are engaged in such an aspect that the wires cannot come off
between the second movable engaging member 70R and the fixed engaging member 70C.
The actuating member 71 has a bending part 71b1 configured to push and bend tip
ends WS (one end portions) of the wires W in a predetermined direction, and a bending part
71b2 configured to push and bend termination ends WE (other end portions) of the wires W cut
by the cutting unit 6A in a predetermined direction
The actuating member 71 is moved in the forward direction denoted with the arrow
A1, so that the tip ends WS of the wires W engaged by the fixed engaging member 70C and the
second movable engaging member 70R are pushed and are thus bent toward the reinforcing
bars S by the bending part 71b1. Also, the actuating member 71 is moved in the forward
direction denoted with the arrow A1, so that the termination ends WE of the wires engaged by
the fixed engaging member 70C and the second movable engaging member 70R and cut by the
cutting unit 6A are pushed and are thus bent toward the reinforcing bars S by the bending part
71b2.
The binding unit 7A includes a rotation regulation part 74 configured to regulate
rotations of the engaging member 70 and the actuating member 71 in conjunction with the
rotating operation of the rotary shaft 72. The rotation regulation part 74 is provided to the
actuating member 71. The rotation regulation part 74 is engaged to an engaging part (not
shown) from an operating area in which the wires W are engaged by the engaging member 70
to an operating area in which the wires W are bent by the bending parts 71b1 and 71b2 of the
actuating member 71. Thereby, the rotation of the actuating member 71 in conjunction with
the rotation of the rotary shaft 72 is regulated, so that the actuating member 71 is moved in the
front and rear direction by the rotating operation of the rotary shaft 72. Also, in an operating
area in which the wires W engaged by the engaging member 70 are twisted, the rotation
regulation part 74 is disengaged from the engaging part (not shown), so that the actuating
member 71 is rotated in conjunction with the rotation of the rotary shaft 72. The first movable
engaging member 70L, the second movable engaging member 70R and the fixed engaging
member 70C of the engaging member 70 engaging the wires W are rotated in conjunction with
the rotation of the actuating member 71.
The drive unit 8A includes a motor 80, and a decelerator 81 for deceleration and
torque amplification. The binding unit 7A and the drive unit 8A are configured so that the
rotary shaft 72 and the motor 80 are coupled via the decelerator 81 and the rotary shaft 72 is
driven via the decelerator 81 by the motor 80.
[0092] The retraction mechanism 53 of the first guide pin 53a is configured by a link
mechanism configured to convert movement of the actuating member 71 in the front and rear
direction into displacement of the first guide pin 53a. Also, the transmission mechanism 62
of the movable blade part 61 is configured by a link mechanism configured to convert
movement of the actuating member 71 in the front and rear direction into a rotating operation
of the movable blade part 61.
Subsequently, the feeding regulation unit 9A configured to regulate the feeding of
the wires W is described. The feeding regulation unit 9A is configured by providing a member,
to which the tip ends WS of the wires W are to be butted, on the feeding path of the wires W to
pass between the fixed engaging member 70C and the second movable engaging member 70R.
As shown in FIGS. 3 and 4B, the feeding regulation unit 9A of the present example is configured
integrally with the guide plate 50R configuring the curl guide 50 and protrudes from the guide
plate 50R in a direction intersecting with the feeding path of the wires W.
The feeding regulation unit 9A includes a parallel alignment regulation part 90
configured to guide a parallel alignment direction of the wires W. The parallel alignment
regulation part 90 is configured by providing a surface of the feeding regulation unit 9A that
the wires W are to come into contact with a concave part extending in a direction intersecting
with a parallel alignment direction of the two wires W to be regulated by the first wire guide
4A and the second wire guide 4A .
Subsequently, a shape of the reinforcing bar binding machine 1A is described. The
reinforcing bar binding machine 1A has such a shape that an operator grips with a hand, and
includes a main body part 10A and a handle part 11A. The main body part 10A of the
reinforcing bar binding machine 1A is provided at an end portion on a front side thereof with
the curl guide 50 and the inductive guide 51A of the curl forming unit 5A. Also, the handle
part 11A of the reinforcing bar binding machine 1A extends downwardly from the main body
part 10A. Also, a battery 15A is detachably mounted to a lower part of the handle part 11A.
Also, the magazine 2A of the reinforcing bar binding machine 1A is provided in front of the
handle part 11A. In the main body part 10A of the reinforcing bar binding machine 1A, the
wire feeding unit 3A, the cutting unit 6A, the binding unit 7A, and the drive unit 8A configured
to drive the binding unit 7A are accommodated.
Subsequently, an operation unit of the reinforcing bar binding machine 1A is
described. A trigger 12A is provided on a front side of the handle part 11A of the reinforcing
bar binding machine 1A, and a switch 13A is provided inside of the handle part 11A. The
reinforcing bar binding machine 1A is configured so that a control unit 14A controls the motor
80 and the feeding motor (not shown), in accordance with a state of the switch 13A pressed as
a result of an operation on the trigger 12A.
<Example of Operation of Reinforcing Bar Binding Machine>
FIGS. 11A to 11E illustrate an example of an operation of binding reinforcing bars
with wires. In the below, an operation of binding the reinforcing bars S with the two wires W
by the reinforcing bar binding machine 1A is described with reference to the drawings.
The reinforcing bar binding machine 1A is in a standby state in which the two wires
W are sandwiched between the first feeding gear 30L and the second feeding gear 30R and the
tip ends WS of the wires W are positioned from the sandwiched position between the first
feeding gear 30L and the second feeding gear 30R to the fixed blade part 60 of the cutting unit
6A. Also, as shown in A, when the reinforcing bar binding machine 1A is in the
standby state, the first movable engaging member 70L is opened with respect to the fixed
engaging member 70C and the second movable engaging member 70R is opened with respect
to the fixed engaging member 70C.
When the reinforcing bars S are inserted between the curl guide 50 and the inductive
guide 51A of the curl forming unit 5A and the trigger 12A is operated, the feeding motor (not
shown) is driven in the forward rotation direction, so that the first feeding gear 30L is rotated
in the forward direction and the second feeding gear 30R is also rotated in the forward direction
in conjunction with the first feeding gear 30L. Thereby, the two wires W sandwiched between
the first feeding gear 30L and the second feeding gear 30R are fed in the forward direction
denoted with the arrow F.
The first wire guide 4A is provided upstream of the wire feeding unit 3A and the
second wire guide 4A is provided downstream of the wire feeding unit 3A with respect to the
feeding direction of the wires W being fed in the forward direction by the wire feeding unit 3A,
so that the two wires W are fed with being aligned in parallel along the axial direction of the
loop Ru formed by the wires W.
When the wires W are fed in the forward direction, the wires W pass between the
fixed engaging member 70C and the first movable engaging member 70L and pass through the
guide groove 52 of the curl guide 50 of the curl forming unit 5A. Thereby, the wires W are
curled to be wound around the reinforcing bars S at three points of the second wire guide 4A
and the first guide pin 53a and the third guide pin 53c of the curl guide 50 and at the second
guide pin 53b upstream of the third guide pin 53c.
The wires W curled by the curl guide 50 are guided to the second guide part 57 by
the first guide part 55 of the inductive guide 51A. As shown in A, the tip ends WS of
the wires W guided to the second guide part 57 come into contact with the guide surface 57a of
the second guide part 57. The wires W curled by the curl guide 50 are further fed in the
forward direction by the wire feeding unit 3A, so that the wires are guided between the fixed
engaging member 70C and the second movable engaging member 70R by the inductive guide
51A. The wires W are fed until the tip ends WS are butted to the feeding regulation unit 9A.
When the wires W are fed to a position in which the tip ends WS are butted to the feeding
regulation unit 9A, the drive of the feeding motor (not shown) is stopped.
In the meantime, there is a slight time lag after the tip ends WS of the wires W come
into contact with the feeding regulation unit 9A until the drive of the wire feeding unit 3A is
stopped. Therefore, as shown in B, the loop Ru formed by the wires W is bent in a
radially expanding direction until it comes into contact with the bottom surface part 55D of the
first guide part 55 of the inductive guide 51A.
After the feeding of the wires W in the forward direction is stopped, the motor 80 is
driven in the forward rotation direction. The rotating operation of the rotary shaft 72 of the
actuating member 71 in conjunction with the rotation of the motor 80 is regulated by the rotation
regulation part 74, so that the rotation of the motor 80 is converted into linear movement.
Thereby, the actuating member 71 is moved in the forward direction denoted with the arrow
When the actuating member 71 is moved in the forward direction, the
opening/closing pin 71a passes through the opening/closing guide hole 73, as shown in 10B. Thereby, the first movable engaging member 70L is moved toward the fixed engaging
member 70C by the rotating operation about the shaft 76 as a support point. When the first
movable engaging member 70L is closed with respect to the fixed engaging member 70C, the
wires W sandwiched between the first movable engaging member 70L and the fixed engaging
member 70C are engaged in an aspect of capable of moving between the first movable engaging
member 70L and the fixed engaging member 70C.
Also, the second movable engaging member 70R is moved toward the fixed engaging
member 70C by the rotating operation about the shaft 76 as a support point. When the second
movable engaging member 70R is closed with respect to the fixed engaging member 70C, the
wires W sandwiched between the second movable engaging member 70R and the fixed
engaging member 70C are engaged is such an aspect that the wires cannot come off between
the second movable engaging member 70R and the fixed engaging member 70C.
Also, when the actuating member 71 is moved in the forward direction, the operation
of the actuating member 71 is transmitted to the retraction mechanism 53, so that the first guide
pin 53a is retracted.
After the actuating member 71 is advanced to a position in which the wires W are
engaged by the closing operation of the first movable engaging member 70L and the second
movable engaging member 70R, the rotation of the motor 80 is temporarily stopped and the
feeding motor (not shown) is driven in the reverse rotation direction. Thereby, the first feeding
gear 30L is reversed and the second feeding gear 30R is also reversed in conjunction with the
first feeding gear 30L.
Therefore, the wires W sandwiched between the first feeding gear 30L and the second
feeding gear 30R are fed in the reverse direction denoted with the arrow R. Since the tip ends
WS of the wires W are engaged in such an aspect that the wires cannot come off between the
second movable engaging member 70R and the fixed engaging member 70C, the wires W are
wound with closely contacting the reinforcing bars S by the operation of feeding the wires W
in the reverse direction, as shown in C.
After the wires W are wound on the reinforcing bars S and the drive of the feeding
motor (not shown) in the reverse rotation direction is stopped, the motor 80 is driven in the
forward rotation direction, so that the actuating member 71 is moved in the forward direction
denoted with the arrow A1. The movement of the actuating member 71 in the forward
direction is transmitted to the cutting unit 6A by the transmission mechanism 62, so that the
movable blade part 61 is rotated and the wires W engaged by the first movable engaging
member 70L and the fixed engaging member 70C are cut by the operation of the fixed blade
part 60 and the movable blade part 61.
After the wires W are cut, the actuating member 71 is further moved in the forward
direction, so that the bending parts 71b1 and 71b2 are moved toward the reinforcing bars S, as
shown in D. Thereby, the tip ends WS of the wires W engaged by the fixed engaging
member 70C and the second movable engaging member 70R are pressed toward the reinforcing
bars S and bent toward the reinforcing bars S at the engaging position as a support point by the
bending part 71b1. The actuating member 71 is further moved in the forward direction, so
that the wires W engaged between the second movable engaging member 70R and the fixed
engaging member 70C are maintained as being sandwiched by the bending part 71b1.
Also, the termination ends WE of the wires W engaged by the fixed engaging
member 70C and the first movable engaging member 70L and cut by the cutting unit 6A are
pressed toward the reinforcing bars S and are bent toward the reinforcing bars S at the engaging
point as a support point by the bending part 71b2. The actuating member 71 is further moved
in the forward direction, so that the wires W engaged between the first movable engaging
member 70L and the fixed engaging member 70C are maintained as being sandwiched by the
bending part 71b2.
After the tip ends WS and the termination ends WE of the wires W are bent toward
the reinforcing bars S, the motor 80 is further driven in the forward rotation direction, so that
the actuating member 71 is further moved in the forward direction. The actuating member 71
is moved to a predetermined position, so that the engaging by the rotation regulation part 74 is
released.
Thereby, the motor 80 is further driven in the forward rotation direction, so that the
actuating member 71 is rotated in conjunction with the rotary shaft 72 and the engaging member
70 holding the wires W are rotated integrally with the actuating member 71, thereby twisting
the wires W, as shown in E.
After the wires W are twisted, the motor 80 is driven in the reverse rotation direction.
The rotating operation of the rotary shaft 72 of the actuating member 71 in conjunction with
the rotation of the motor 80 is regulated by the rotation regulation part 74, so that the rotation
of the motor 80 is converted into linear movement. Thereby, the actuating member 71 is
moved in the backward direction denoted with the arrow A2.
When the actuating member 71 is moved in the backward direction, the bending parts
71b1 and 71b2 separate from the wires W, so that the holding state of the wires W by the
bending parts 71b1 and 71b2 is released. Also, when the actuating member 71 moved in the
backward direction, the opening/closing pin 71a passes through the opening/closing guide hole
73, as shown in A. Thereby, the first movable engaging member 70L is moved away
from the fixed engaging member 70C by the rotating operation about the shaft 76 as a support
point. Also, the second movable engaging member 70R is moved away from the fixed
engaging member 70C by the rotating operation about the shaft 76 as a support point. Thereby,
the wires W come off from the engaging member 70.
FIGS. 12A, 12B and 12C illustrate movement of the wires in the inductive guide of
the first embodiment. In the below, an operational effect of guiding the wires W by the
inductive guide 51A is described.
As described above, the wires W cured by the curl guide 50 are directed toward the
other direction that is an opposite direction to one direction in which the reel 20 is offset. For
this reason, in the inductive guide 51A, the wires W entering between the side surface part 55L
and the side surface part 55R of the first guide part 55 are first introduced toward the third
guiding part 55R1 of the side surface part 55R.
In the reinforcing bar binding machine of the related art, when it is assumed that a
locus of wires curled to form a loop by the curl guide is a circle, a diameter thereof is about 50
to 70mm. In contrast, according to the reinforcing bar binding machine 1A, when it is
assumed that a locus of wires W curled to form the loop Ru by the curl guide 50 is an ellipse, a
length in a long axis direction is about equal to or greater than 75mm and equal to or less than
100mm.
In this way, when the length in the long axis direction is about equal to or greater
than 75mm and equal to or less than 100mm, on the assumption that the locus of wires W curled
to form the loop Ru by the curl guide 50 is an ellipse, an entry angle α1 of the wires W entering
toward the third guiding part 55R1 of the side surface part 55R increases, as compared to the
reinforcing bar binding machine of the related art.
For this reason, when the tip ends WS of the wires W entering toward the third
guiding part 55R1 of the side surface part 55R of the inductive guide 51A come into contact
with the third guiding part 55R1, a resistance increases upon guiding of the tip ends WS of the
wires W along the third guiding part 55R1. Therefore, a feeding defect that the wires W are
not directed toward between the narrowest part 55EL2 of the first guiding part 55L1 and the
narrowest part 55ER2 of the third guiding part 55R1 may occur.
Therefore, the entry angle regulation part 56A is provided to cause the tip ends of the
wires W entering toward the third guiding part 55R1 of the side surface part 55R to be directed
toward between the narrowest part 55EL2 of the first guiding part 55L1 and the narrowest part
55ER2 of the third guiding part 55R1.
That is, when the wires W entering between the side surface part 55L and the side
surface part 55R of the first guide part 55 are introduced toward the third guiding part 55R1 of
the side surface part 55R, the wires W at a part located between the side surface part 55L and
the side surface part 55R come into contact with the entry angle regulation part 56A, as shown
in B. When the wires W come into contact with the entry angle regulation part 56A,
a force of rotating the wires W in a direction in which the tip ends WS of the wires W are caused
to be directed toward between the narrowest part 55EL2 of the first guiding part 55L1 and the
narrowest part 55ER2 of the third guiding part 55R1 is applied to the wires W with the entry
angle regulation part 56A as a support point.
Thereby, as shown in C, an entry angle α2 of the wires W (α2<α1) entering
toward the third guiding part 55R1 of the side surface part 55R decreases and the tip ends WS
of the wires W are directed toward between the narrowest part 55EL2 of the first guiding part
55L1 and the narrowest part 55ER2 of the third guiding part 55R1. Therefore, the wires W
curled by the curl guide 50 can be introduced between the pair of second guiding part 55L2 and
fourth guiding part 55R2 of the first guide part 55.
FIGS. 13A, 13B and 13C illustrate engaged state of the wires in the engaging
member. In the below, when engaging the two wires W in the engaging member 70, an
operational effect of guiding a parallel alignment direction of the two wires W is described.
In the reinforcing bar binding machine of the related art, the wires W are guided to
the engaging member 70 of the binding unit 7A without the wires W contacting the guide
surface 57a of the second guide part 57. In contrast, according to the reinforcing bar binding
machine 1A, the wires W guided to the second guide part 57 by the first guiding part 55L1 and
the third guiding part 55R1 of the first guide part 55 of the inductive guide 51A are contacted
to the guide surface 57a and are thus guided to the engaging member 70 of the binding unit 7A,
as shown in FIGS. 11A and 11B.
When the two wires W come into contact with the guide surface 57a, the wires W are
guided between the fixed engaging member 70C and the second movable engaging member
70R in a state in which the parallel alignment direction of the two wires W is regulated by the
guide surface 57a.
Since the guide surface 57a is planar, when the two wires W are fed with being in
contact with the guide surface 57a, the two wires W are aligned in parallel in a direction
following the axial direction of the loop Ru formed by the wires W.
For this reason, as shown in C, the two wires W are aligned in parallel along
the direction in which the second movable engaging member 70R is opened/closed with respect
to the fixed engaging member 70C, and the two wires W are engaged between the fixed
engaging member 70C and the second movable engaging member 70R in a state in which an
interval corresponding two wires is formed. Thereby, a load to be applied to the engaging
member 70 increases.
Therefore, the parallel alignment direction of the two wires W is guided with the
feeding regulation unit 9A. FIGS. 14A and 14B illustrate movement of the wires in the
feeding regulation unit. In the below, an operational effect of guiding the wires W with the
feeding regulation unit 9A is described.
The feeding regulation unit 9A has the parallel alignment regulation part 90 provided
on a surface with which the wires W come into contact and extending in a direction intersecting
with a parallel alignment direction of the two wires W to be regulated by the first wire guide
4A and the second wire guide 4A .
The parallel alignment regulation part 90 has such a shape that it is concave in the
feeding direction of the wires W being fed in the forward direction. Therefore, when the tip
ends WS of the wires W are pressed to the feeding regulation unit 9A, the tip ends WS of the
wires W are guided toward an apex of the concave portion configuring the parallel alignment
regulation part 90.
Thereby, as shown in A, when the two wires W are fed in the forward
direction until the tip ends WS of the two wires W having passed between the fixed engaging
member 70C and the second movable engaging member 70R are contacted and pressed to the
feeding regulation unit 9A, the tip ends WS of the two wires W are guided along the extension
direction of the parallel alignment regulation part 90, as shown in B. Therefore, a
direction in which the two wires W are aligned in parallel between the fixed engaging member
70C and the second movable engaging member 70R is guided to the radial direction of the loop
Ru shown in
[0134] For this reason, as shown in A, it is possible to guide the two wires W so that
the wires are to be aligned in parallel in a direction intersecting with the opening/closing
direction of the second movable engaging member 70R with respect to the fixed engaging
member 70C. Therefore, as shown in B, the two wires W are engaged between the
fixed engaging member 70C and the second movable engaging member 70R in such an aspect
that an interval corresponding to one wire is formed therebetween. As a result, it is possible
to reduce the load to be applied to the engaging member 70, thereby securing engaging the two
wires W.
A is a front view depicting an example of a wire feeding unit, B is a
sectional view depicting an example of the wire feeding unit, and C is an enlarged view
of main parts of B. Subsequently, a wire feeding unit 3B of the second embodiment
is described. In the wire feeding unit 3B of the second embodiment, the same configurations
as the wire feeding unit 3A of the first embodiment are denoted with the same reference signs,
and the detailed descriptions thereof are omitted.
The first displacement member 36 has position regulation parts 36L1 and 36L2
configured to regulate an axial position of the first feeding gear 30L with respect to the second
feeding gear 30R. The position regulation part 36L1 is an example of one position regulation
part, protrudes from the first displacement member 36 toward the first feeding gear 30L, is
provided at a part facing one surface 30L1 positioned in the axial direction of the first feeding
gear 30L, and is in contact with one surface 30L1 of the first feeding gear 30L. Also, the
position regulation part 36L2 is an example of one position regulation part, protrudes from the
first displacement member 36 toward the first feeding gear 30L, is provided at a part facing the
other surface 30L2 positioned in the axial direction of the first feeding gear 30L, and is in
contact with the other surface 30L2 of the first feeding gear 30L.
The first displacement member 36 has a position regulation part 36R1 configured to
regulate an axial position of the second feeding gear 30R. The position regulation part 36R1
is an example of the other position regulation part, is provided at a part facing the other surface
30R1 positioned in the axial direction of the second feeding gear 30R, and is in contact with
the other surface 30R1 of the second feeding gear 30R.
The axial position of the first feeding gear 30L is regulated from one surface 30L1-
side of the first feeding gear 30L and the other surface 30L2-side of the first feeding gear 30L
by the position regulation parts 36L1 and 36L2 provided to the first displacement member 36.
Also, the axial position of the second feeding gear 30R is regulated from the other surface 30R1-
side of the second feeding gear 30R, which is opposite to the first feeding gear 30L, by the
position regulation part 36R1 provided to the first displacement member 36.
Thereby, axial movement of the first feeding gear 30L toward one surface 30L1-side
and the other surface 30L2 is regulated, and the axial positions of the first feeding gear 30L and
the second feeding gear 30R configured to be displaced in the contact/separation direction with
respect to the first feeding gear 30L are primarily determined by the first displacement member
36. Therefore, it is possible to maintain the axial positions of the first feeding gear 30L and
the second feeding gear 30R in preset positions in a state in which the two wires W are
sandwiched between the groove portion 32L of the first feeding gear 30L and the groove portion
32R of the second feeding gear 30R.
[0140] Therefore, it is possible to feed the two wires in a state in which the axial positions
of the first feeding gear 30L and the second feeding gear 30R are maintained in preset positions.
Thereby, it is possible to suppress occurrence of a feeding trouble of the wires due to uneven
wears of the groove portion 32L of the first feeding gear 30L and the groove portion 32R of the
second feeding gear 30R.
REFERENCE SIGNS LIST
1A…reinforcing bar binding machine, 10A…main body part, 2A…magazine
(accommodation unit), 20…reel, 21…hub part, 22, 23…flange part, 3A, 3B…wire feeding unit,
30L…first feeding gear (feeding member), 31L…tooth part, 32L…groove portion,
30R…second feeding gear (feeding member), 30L1…one surface, 30L2…other surface,
30R1…other surface, 31R…tooth part, 32R…groove portion, 36…first displacement member,
36L1…position regulation part, 36L2…position regulation part, 36R1… position regulation
part, 37…second displacement member, 38…spring, 4A …first wire guide, 4A …second wire
guide, 5A…curl forming unit, 50…curl guide, 51A…inductive guide, 53…retraction
mechanism, 53a…first guide pin, 53b…second guide pin, 53c…third guide pin, 55…first guide
part, 55L…side surface part, 55R…side surface part, 55D…bottom surface part, 55L1…first
guiding part, 55L2…second guiding part, 55R1…third guiding part, 55R2…fourth guiding
part, 55S…converging passage, 55E1…opening end portion, 55E2…narrowest part,
55EL1…opening end portion, 55ER1…opening end portion, 55EL2…narrowest part,
55ER2…narrowest part, 55EL3…virtual line, 56A…entry angle regulation part, 57…second
guide part, 57a…guide surface, 6A…cutting unit, 60…fixed blade part, 61…movable blade
part, 62…transmission mechanism, 7A…binding unit, 70…engaging member, 70L…first
movable engaging member, 70R…second movable engaging member, 70C…fixed engaging
member, 71…actuating member, 71a…opening/closing pin, 71b1…bending part, 71b2…
bending part, 72…rotary shaft, 73…opening/closing guide hole, 74…rotation regulation part,
8A…drive unit, 80…motor, 81…decelerator, 9A…feeding regulation unit, 90…parallel
alignment regulation part, W…wire
Claims (4)
1. A binding machine comprising: a wire feeding unit configured to feed a wire to be wound on an object to be bound; 5 a binding unit configured to twist the wire wound on the object to be bound; a curl guide configured to curl the wire being fed by the wire feeding unit; and an inductive guide configured to guide the wire curled by the curl guide toward the binding unit, wherein the wire feeding unit comprises: 10 a pair of feeding members facing each other with a feeding path of the wire being interposed therebetween, each of the feeding members configured to rotate about a shaft as a support point extending in a direction intersecting with the feeding path of the wire, and a position regulation part configured to regulate axial relative positions of the pair of feeding members.
2. The binding machine according to Claim 1, wherein the position regulation part comprises one position regulation part in contact with a surface positioned in an axial direction of one of the feeding members and the other position regulation part in contact with a surface positioned in an axial direction of the other 20 feeding member.
3. The binding machine according to Claim 2, further comprising a displacement member configured to displace the other feeding member toward and away from the one feeding member, 25 wherein the position regulation part has the one position regulation part and the other position regulation part provided to the displacement member.
4. The binding machine according to Claim 2 or 3, wherein the position regulation part comprises the one position regulation part in 30 contact with one surface and the other surface positioned in the axial direction of the one feeding member, and the other position regulation part in contact with the other surface positioned in the axial direction of the other feeding member.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019-044292 | 2019-03-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
NZ762528A true NZ762528A (en) | 2020-03-27 |
Family
ID=
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