NZ761705A - Binding machine - Google Patents
Binding machine Download PDFInfo
- Publication number
- NZ761705A NZ761705A NZ761705A NZ76170520A NZ761705A NZ 761705 A NZ761705 A NZ 761705A NZ 761705 A NZ761705 A NZ 761705A NZ 76170520 A NZ76170520 A NZ 76170520A NZ 761705 A NZ761705 A NZ 761705A
- Authority
- NZ
- New Zealand
- Prior art keywords
- wire
- reel
- restricting
- binding machine
- accommodation
- Prior art date
Links
- 230000004308 accommodation Effects 0.000 claims abstract description 63
- 230000002093 peripheral Effects 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 5
- 230000003014 reinforcing Effects 0.000 description 39
- 238000005452 bending Methods 0.000 description 18
- 230000001629 suppression Effects 0.000 description 7
- 240000005511 Pisonia aculeata Species 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000003892 spreading Methods 0.000 description 3
- 229920000122 Acrylonitrile butadiene styrene Polymers 0.000 description 2
- 239000004698 Polyethylene (PE) Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000003825 pressing Methods 0.000 description 1
- 230000001105 regulatory Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
A binding machine includes: an accommodation portion accommodating a reel around which a wire is wound; a wire feeding portion configured to feed the wire in a forward direction, winds the wire around a binding object, feeds the wire in a reverse direction, and wraps the wire around the binding object; and a torsion portion that twists the wire. The accommodation portion accommodates the reel such that the reel is offset in one direction along an axial direction of the reel with respect to the wire feeding portion. The binding machine further includes a restricting portion, in a wire passage between the reel and the wire feeding portion, which protrudes inward of the accommodation portion and has a restricting surface with which the wire bent in the other direction along the axial direction of the reel between the reel and the wire feeding portion comes in contact. ct; and a torsion portion that twists the wire. The accommodation portion accommodates the reel such that the reel is offset in one direction along an axial direction of the reel with respect to the wire feeding portion. The binding machine further includes a restricting portion, in a wire passage between the reel and the wire feeding portion, which protrudes inward of the accommodation portion and has a restricting surface with which the wire bent in the other direction along the axial direction of the reel between the reel and the wire feeding portion comes in contact.
Description
BINDING MACHINE
TECHNICAL FIELD
The present invention relates to a binding machine which binds a binding object such
as a reinforcing bar with a wire.
BACKGROUND ART
In recent years, there has been proposed a binding machine called a reinforcing bar
binding machine which winds a wire around two or more reinforcing bars, twists the wound
wire, and binds the two or more reinforcing bars.
The reinforcing bar binding machine of the related art has a configuration in which a
wire is fed by a wire feeding portion and wound around the reinforcing bar, and then the wire
is twisted and bound. With respect to such a reinforcing bar binding machine, there has been
proposed a reinforcing bar binding machine in which, after winding the wire around the
reinforcing bar, the wire is wrapped in close contact with the bar and cut, and then a point
where one end portion side of the wire and the other end portion side intersect is twisted to
bind the reinforcing bar.
The wire is fed in a reverse direction by the wire feeding portion to pull back the
wire wound around the reinforcing bar and wrap it around the reinforcing bar. When the
wire is fed in the reverse direction, the wire wound around the reel bends. Further feeding
movement of the wire in the reverse direction causes the bent wire to move laterally along an
axial direction of the reel. The lateral movement of the wire becomes more pronounced as
the reel is offset to one side in a left-right direction with respect to the wire feeding portion.
When the wire is fed in the reverse direction by the wire feeding portion, the wire will be
oriented in an offset direction of the reel. Therefore, a technique has been proposed in which
a restricting portion formed of a convex portion for restricting the movement of the wire is
provided in an inner wall portion on an offset side of the reel (for example, see WO
2017/014280).
In addition, a technique has been proposed that includes means for restricting a wire
between the reel and the wire feeding portion from coming off an input route to the wire
feeding portion in an operation of feeding the wire in the reverse direction (for example, see
JP-A25700).
[0006]
In the binding machine, a space is provided between the reel and the wire feeding
portion for loading the wire into the wire feeding portion and the wire can move in the axial
direction of the reel between the reel and the wire feeding portion. In an operation of
feeding the wire in the reverse direction, when the bent wire moves laterally in an offset
direction of the reel along the axial direction of the reel, a force which bends
the wire in an opposite direction to the offset direction of the reel is applied in a portion
between the reel and the wire feeding portion. When the amount of bending of the wire of
the portion between the reel and the wire feeding portion increases, a so-called buckling state
in which the wires are bent occurs. This causes the wires to easily become entangled with
each other. As a result, it leads to a wire feeding failure and to reloading of the reel after
removing the unusable wire. Also, when the amount of bending of the wire increases, the
wire easily comes off the reel from the flange portion of the reel.
SUMMARY OF INVENTION
In order to solve such a problem, an aspect of the invention provides a binding
machine capable of suppressing the amount of bending of a wire.
In order to solve such a problem, an embodiment of the present invention provides a
binding machine, which includes:
an accommodation portion accommodating a reel around which a wire is wound;
a wire feeding portion configured to feed the wire wound around the reel in a
forward direction, winds the wire around a binding object, feeds the wire wound around the
binding object in a reverse direction, and wraps the wire around the binding object; and
a torsion portion configured to twist the wire, in which
the accommodation portion accommodates the reel in such a manner that the reel is
offset in one direction along an axial direction of the reel rotated by the wire being fed with
respect to the wire feeding portion, and
further comprising a restricting portion, in a wire passage between the reel
accommodated in the accommodation portion and the wire feeding portion, which protrudes
inward of the accommodation portion and has a restricting surface with which the wire bent in
the other direction along the axial direction of the reel between the reel and the wire feeding
portion comes in contact.
In the movement of feeding the wire in the reverse direction, the wire wound around
the reel bends. Further feeding movement of the wire in the reverse direction causes the
bent wire to move along the axial direction of the reel to the side where the reel is offset.
Further feeding movement of the wire in the reverse direction causes the wire between the
reel and the wire feeding portion to be bent in the other direction along the axial direction of
the reel, to the opposite side to the side where the reel is offset. On the opposite side to the
side where the reel is offset, the wire bent in the other direction along the axial direction of the
reel comes into contact with the restricting portion which protrudes inward in the
accommodation portion and in the offset direction of the reel, in such a manner that the force
which bends the wire to the opposite side in the offset direction of the reel is received by the
restricting portion between the reel and the wire feeding portion.
According to the above embodiment of the present invention, in the movement of
feeding the wire in the reverse direction, when a force which bends the wire between the reel
and the wire feeding portion is applied, this force is received by the restricting portion
between the reel and the wire feeding portion, which makes it difficult for the wire to bend.
Therefore, the amount of bending of the wire in the wire passage is reduced, it is possible to
prevent the wires from becoming entangled with each other, and thus it is possible to suppress
the occurrence of wire feeding failure. In addition, the wire is prevented from coming off
the reel from the flange portion of the reel.
BRIEF DESCRIPTION OF DRAWINGS
[0011]
Fig. 1 is a partially cutaway side view of a binding machine according to an
embodiment.
Fig. 2 is a front view of the binding machine of Fig. 1.
Fig. 3 is a side view of an accommodation portion.
Fig. 4 is a side view illustrating an internal configuration of the accommodation
portion.
Fig. 5 is a cutaway perspective view illustrating the internal configuration of the
accommodation portion.
Fig. 6 is a cross-sectional view taken along the line A-A of Fig. 3, illustrating the
internal configuration of the accommodation portion.
Fig. 7A is a perspective view of a cover of the accommodation portion as viewed
from the back.
Fig. 7B is a perspective view of the cover of the accommodation portion as viewed
from the back.
Fig. 8 is a plan view of the cover of the accommodation portion as viewed from the
back.
Fig. 9 is a cross-sectional view of the cover of the accommodation portion.
Fig. 10 is a perspective view of the cover of the accommodation portion as viewed
from the back.
DESCRIPTION OF EMBODIMENTS
[0012]
Hereinafter, an embodiment of a binding machine of the invention will be described.
Figs. 1 to 10 are for explaining the embodiment.
<Configuration>
Hereinafter, the configuration will be described. As illustrated in a side view of Fig.
1 and a front view of Fig. 2, for example, a reinforcing bar binding machine (binding
machine) 1A is used to bind a binding object (hereinafter referred to as a reinforcing bar S)
such as a reinforcing bar or an electric wire at a building site. This reinforcing bar binding
machine 1A feeds a wire W in a forward direction indicated by an arrow F, curls the wire W
while giving it an arc-shaped bending habit, and forms a loop Ru surrounding the reinforcing
bar S. Next, in order to pull back the wire W, the wire W is sent in a reverse direction
indicated by an arrow R and the wire W on which the loop Ru is formed is wrapped around
the reinforcing bar S, and then the wire W is cut. Next, the reinforcing bar S can be bound
by twisting the wire W.
Hereinafter, the reinforcing bar binding machine 1A will be described. The
reinforcing bar binding machine 1A described above includes a main body portion 10A and a
handle portion 11A.
In the following description, the direction is based on a state (a state in which the
reinforcing bar binding machine 1A is set up) of Fig. 1. A longitudinal direction (a direction
corresponding to a left-right direction in Fig. 1) of the main body portion 10A is defined as a
front-back direction and one predetermined direction (a direction corresponding to an
up-down direction in Fig. 1) of the directions orthogonal to the longitudinal direction of the
main body portion 10A is defined as an up-down direction (or a height direction). Further, a
direction orthogonal to the front-rear direction and the up-down direction is defined as a
left-right direction (or a width direction). One end side (a side facing the reinforcing bar S,
the left side in Fig. 1) of the main body portion 10A in the longitudinal direction is defined as
a front side or a tip end side and the other end side (a side opposite to the reinforcing bar S,
the right side in Fig. 1) of the main body portion 10A in the longitudinal direction is defined
as a rear side or a rear end side. Further, the upper side of Fig. 1 is referred to as an upper
side with respect to the main body portion 10A and the lower side (a direction in which the
handle portion 11A extends) of Fig. 1 is referred to as a lower side with respect to the main
body portion 10A. The back side (the left side in Fig. 2) of the paper of Fig. 1 is the right
side of the main body portion 10A and the front side (the right side in Fig. 2) of the paper of
Fig. 1 is the left side of the main body portion 10A.
The handle portion 11A is provided so as to extend substantially downward from a
substantially middle portion in the longitudinal direction of the main body portion 10A. A
trigger 12A is provided on the handle portion 11A and a battery pack 15A can be attached to
and detached from the lower portion. Then, by pulling the trigger 12A with a power switch
(not illustrated) turned on, the reinforcing bar binding machine 1A is operated and a binding
operation is performed.
Further, an accommodation portion 110 for setting a reel 120 around which the wire
W used for binding the reinforcing bar S is wrapped is provided on the front side of the
handle portion 11A. The reel 120 around which the wire W is wound is set in a detachable
manner with respect to the accommodation portion 110.
Further, the main body portion 10A is provided with a wire feeding portion 160 for
feeding the wire W wound around the reel 120 toward a binding portion 150 provided on the
tip end side of the main body portion 10A. The wire feeding portion 160 is provided at the
lower part on the tip end side of the main body portion 10A. The accommodation portion
110 is provided below the wire feeding portion 160.
As illustrated in Fig. 2, the wire feeding portion 160 includes feeding gears 170
which are a pair of feeding members for feeding the wire W, a feed motor (not illustrated)
which rotationally drives one of the pair of feeding gears 170, and the like. The feeding
gears 170 are provided in a pair, for example, so as to pinch the wire W from right and left.
One of the pair of left and right feeding gears 170 is a driving wheel and the other is a driven
wheel. The feeding gear 170 as a driven wheel is provided so as to be movable in a direction
approaching and away from the feeding gear 170 as a drive wheel. Further, the feeding gear
170 as a driven wheel is pressed with a required pressing force in a direction approaching the
feeding gear 170 as a driven wheel.
At the center in the thickness direction of the outer periphery of the feeding gear 170,
a V-shaped feeding groove portion for receiving the wire W and frictionally driving is
provided, forming a biting groove extending in a circumferential direction.
The wire feeding portion 160 can feed the wire W to the binding portion 150 by
rotating the feeding gear 170 forward. Also, by reversing the feeding gear 170, the wire W
can be pulled back from the binding portion 150 to the accommodation portion 110.
Further, the binding portion 150 is provided with an abutment portion 250 which can
abut on the reinforcing bar S. Further, the binding portion 150 is provided with a curl guide
portion 5A for turning the wire W fed by the wire feeding portion 160 into the loop Ru. The
curl guide portion 5A has a first guide portion 50 and a second guide portion 51 provided in a
pair above and below with the abutment portion 250 interposed therebetween.
The first guide portion 50 has a curling groove portion on its inner peripheral side for
imparting an arc-shaped bending habit to the wire W. The second guide portion 51 has a
groove on its inner peripheral side for receiving the wire W curled by the first guide portion
50. Then, the wire W is made to pass through the space between the first guide portion 50
and the second guide portion 51 in a counterclockwise direction in the drawing to form the
loop Ru. Also, a portion between the first guide portion 50 and the second guide portion 51
is a passage portion for passing the reinforcing bar S toward the abutment portion 250.
Further, as illustrated in Figs. 1 and 2, the main body portion 10A is provided with a
wire guide 310 for guiding the wire W and regulating the position at least on an entry side of
the wire feeding portion 160. Although not illustrated, wire guides are also provided at an
exit side of the wire feeding portion 160 and at least the position of a base portion of the first
guide portion 50. In a configuration in which two wires W are fed, the guide serves as a
parallel guide for arranging the two wires W in parallel.
[0025]
Although not illustrated, on the exit side of the wire feeding portion 160, a cutting
portion is provided for separating the loop Ru portion of the wire W from other portions and
has a fixed blade and a movable blade.
In addition, the abutment portions 250 on the tip end side of the main body portion
10A are located on both sides in the axial direction of the loop Ru of the wire W and are
provided as a pair of left and right with a required interval. At the position between the left
and right abutment portions 250 inside the main body portion 10A, there is provided a torsion
portion 350 for tightening the wire W into the reinforcing bar S by twisting the wire W
formed into the loop Ru. The torsion portion 350 includes a grip portion 70 capable of
pinching, separating, and hooking the wire W and a drive mechanism (not illustrated) for
rotating the grip portion 70 and the like.
As illustrated in Fig. 2, the grip portion 70 includes a fixed grip member 70C and a
pair of left and right first movable grip member 70L and second movable grip member 70R.
The grip portion 70 can form left and right wire passing portions for separately passing the
overlapping portions of the wire W formed into the loop Ru.
As illustrated in Fig. 6, the reel 120 includes a cylindrical hub portion 410 serving as
a core of the wire W and a pair of flange portions 420 and 430 provided integrally on both end
sides in the axial direction of the hub portion 410 or in the vicinities thereof. The flange
portions 420 and 430 are formed in a substantially disc shape having a larger diameter than
that of the hub portion 410 and are provided concentrically with the hub portion 410. The
reel 120 is made of a resin such as ABS resin, polyethylene, or polypropylene. In the reel
120, one wire or two or more wires W are wound around the hub portion 410. For example,
when two wires W are wound around the hub portion 410, two wires W can be pulled out
from the reel 120 at the same time. The direction in which the reel 120 is attached to or
detached from the accommodation portion 110 is the axial direction of the reel 120 along an
axial direction of the hub portion 410.
The reel 120 is rotated following the withdrawal of the wire W from the reel 120 by
the operation of feeding the wire W in a forward direction with the wire feeding portion 160.
For this purpose, the accommodation portion 110 is provided with a first support portion 690
which is a support portion for supporting the flange portion 420 side of the hub portion 410 of
the reel 120. Also, on the inner surface of a cover 580 which opens or closes the
accommodation portion 110, a second support portion 680 is provided as a support portion for
supporting the flange portion 430 side of the hub portion 410 of the reel 120 by entering a
concave portion 670 provided on the outer surface of the flange portion 430 of the reel 120.
The first support portion 690 is configured to allow rotation of the reel 120 in the operation of
feeding the wire W in the forward direction and to restrict the rotation of the reel 120 in the
operation of feeding the wire W in the opposite direction. The second support portion 680 is
formed integrally with the cover 580.
[0030]
When the reinforcing bar binding machine 1A has the orientation illustrated in Fig. 1,
the wire W is pulled out substantially upward from the reel 120 by clockwise rotation (see Fig.
1) of the reel 120. In addition, the reel 120 is arranged in one of the left and right directions
with respect to a width center position of the main body portion 10A and the wire feeding
portion 160, and in this example, the reel 120 is offset to the left side of the apparatus so that a
right-handed person can easily handle it (right side in Fig. 2). In particular, the reel 120 is
completely offset laterally with respect to the first guide portion 50. However, the reel 120
may be offset from the main body portion 10A or the wire feeding portion 160 on the side
opposite to the side described above. The width center position of the wire feeding portion
160 indicates a feed path of the wire W, and specifically, is a guide position of the wire W by
the wire guide 310.
The accommodation portion 110 is formed of a case 560 capable of accommodating
the reel 120 and a member such as the cover 580 capable of opening or closing an opening
portion 570 for mounting the reel 120 provided in the case 560. In addition, the case 560
and the cover 580 are formed of a resin such as an ABS resin, polyethylene, or polypropylene.
The accommodation portion 110 is referred to as a magazine or the like and a reel
accommodation portion 110a formed of at least a substantially cylindrical concave portion
capable of accommodating the reel 120 is formed inside the case 560.
The accommodation portion 110 is provided with a wire passage 110b above the reel
accommodation portion 110a for guiding the wire W drawn from the reel 120 to the wire
guide 310 on the entry side of the wire feeding portion 160 (see Figs. 1 and 2). The wire
passage 110b is provided between the reel accommodation portion 110a and the wire feeding
portion 160, more specifically, between the reel 120 accommodated in the accommodation
portion 110 and the wire feeding portion 160. The wire passage 110b is integrally connected
to the reel accommodation portion 110a to form a space through which the wire W can freely
pass.
The opening portion 570 is provided on one side of the case 560, which is the offset
side of the reel 120, in this example, on the left-side surface (right side in Fig. 2) of the
apparatus.
The cover 580 is called a magazine cover or the like and has substantially the same
shape as the opening portion 570 of the case 560. The cover 580 is attached to the case 560
so as to open or close around a hinge portion 610. The hinge portion 610 is provided at a
position on the rear side of the accommodation portion 110. An urging spring which
constantly urges the cover 580 in an opening direction with respect to the case 560 is
interposed in the hinge portion 610.
A lock device 620 (see Fig. 1) for holding the cover 580 in a closed state is provided
between the case 560 and the cover 580.
In contrast to the above basic or overall configuration, this embodiment has the
following configuration.
In order to pull back the wire W and wrap it around the reinforcing bar S, as
illustrated in Fig. 1, in the operation of feeding the wire W in the reverse direction indicated
by the arrow R, since the reel 120 does not rotate, the wire W of the part wound around the
reel 120 bends in a direction of spreading as indicated by an arrow R1 along a radial direction
of the reel 120 indicated by an arrow Q1. The bent portion of the wire W is a portion
provided on a part of the accommodation portion 110 which is the part on a side opposite to
the side where the wire passage 110b is provided and comes into contact with an inner wall
portion 510 along the circumferential direction of the reel 120 indicated by an arrow Q3.
[0039]
As illustrated in Fig. 2, in a state where the bent portion of the wire W comes into
contact with a part of the accommodation portion 110 which is the portion on a side opposite
to the side where the wire passage 110b is provided with respect to the first support portion
690 and the second support portion 680, that is, the inner wall portion 510 on the opposite
side to the side where the wire passage 110b is provided in the radial direction of the reel 120
indicated by the arrow Q1 in Fig. 2, when the wire W is further fed in the reverse direction
indicated by the arrow R, the wire W moves laterally along the axial direction of the reel 120
indicated by an arrow Q2 as indicated by an arrow R2 in Fig. 2.
The lateral movement of the wire W became remarkable due to offsetting the reel
120 to one of the left and right directions with respect to the main body portion 10A and the
wire feeding portion 160. When the wire W is fed in the reverse direction by the wire
feeding portion 160, the wire W is directed to an offset direction of the reel 120 with respect
to the wire feeding portion 160, that is, to the right in Fig. 2.
[0041]
Also, when the wire W is further fed in the reverse direction in a state where the wire
W is in contact with the inner wall portion 510, in the wire W, a portion between the portion
pulled out from the reel 120 and the portion fed in the reverse direction by the wire feeding
portion 160 moves in a direction of a front wall portion 110c of the wire passage 110b as
illustrated by an arrow R3 in Fig. 1.
When the wire W comes in contact with the front wall portion 110c by feeding the
wire W in the reverse direction and cannot move in the direction of the front wall portion 110c,
the wire W bends in the lateral direction as illustrated by an arrow R4 in Fig. 2. In the wire
passage 110b, a space for facilitating the work of manually loading the wire W into the wire
feeding portion 160 is secured. As a result, the amount of bending of the wire W is
increased by the operation of feeding the wire W in the opposite direction, and thus the wire
W may be bent. As described above, in the wire W, the portion between the portion pulled
out from the reel 120 and the portion interposed by the wire feeding portion 160 bends and
the amount of bending increases and the wire W bends. This is referred to as buckling.
The direction in which the wire W bends is the other direction opposite to the offset
direction of the reel 120, which is one direction, and is directed toward a left side wall portion
110e in Fig. 2. When the amount of bending of the wire W increases and the wire W is bent,
entanglement or the like between the wires W is likely to occur and this causes a feed failure.
In particular, in the configuration where two wires W are fed, the diameter of the wire W is
small. Therefore, the order in which the wire W is wound is easily collapsed, for example, a
state where the two wire W cross each other or a state where the two wire W are separated
from each other. As a result, the wire W is easily entangled. Further, when the amount of
bending of the wire W increases, the wire W in a portion in contact with the inner wall portion
510 further moves laterally in the offset direction of the reel 120 and the wire W that has
moved in the lateral direction easily exceeds the flange portion 430 of the reel 120.
[0044]
Therefore, the accommodation portion 110 includes a restricting portion 111 to
reduce the amount of bending of the wire W. In a wire passage 110b between the reel 120
accommodated in the accommodation portion 110 and the wire feeding portion 160, the
restricting portion 111 is provided on the side wall portion 110e in the other direction opposite
to the one direction in which the reel 120 is offset.
The restricting portion 111 includes a restricting surface 111a which protrudes inward
of the accommodation portion 110 and comes in contact with the wire W which is bent in the
other direction opposite to the offset direction of the reel 120 along the axial direction of the
reel 120 between the reel 120 and the wire feeding portion 160. The restricting portion 111
protrudes at a predetermined height from the front wall portion 110c in a direction crossing
the offset direction of the reel 120 along the offset direction (one direction) of the reel 120
from the side wall portion 110e. In addition, the restricting portion 111 does not need to
protrude from the side wall portion 110e as long as the restricting portion 111 has the
restricting surface 111a with which the wire W bent in the other direction opposite to the
offset direction of the reel 120 is in contact and it may protrude from the front wall portion
110c to the inside of the accommodation portion 110 in the direction crossing the offset
direction of the reel 120.
The restricting portion 111 includes a restricting convex portion 111b for restricting
the wire W in contact with the restricting surface 111a from coming off the restricting surface
111a. The restricting convex portion 111b has a protrusion protruding inward (in one
direction) of the accommodation portion 110 and the wire passage 110b from the restricting
surface 111a along the edge portion of the restricting surface 111a and the restricting surface
111a is formed in a concave shape along the direction in which the wire W is fed.
As described above, the accommodation portion 110 includes the case 560 in which
the reel 120 is accommodated and the cover 580 provided to be openable or closable on the
side (one direction side) in which the reel 120 is offset with respect to the case 560. The
direction in which the wire W bends when the wire W is fed in the reverse direction is set as
the opposite side (the other direction side) of the side where the wire W is offset. Therefore,
the restricting portion 111 is provided in the case 560.
[0048]
Also, as illustrated in Figs. 4, 6, 7A, 7B, 8, and 9, the accommodation portion 110
includes a detachment restricting portion 112 which prevents the wire W that moves laterally
in the axial direction of the reel 120 by the operation of feeding the wire W in the reverse
direction from exceeding the flange portion 430 of the reel 120.
[0049]
As described above, the wire W laterally moved by the operation of feeding the wire
W in the reverse direction is directed to one direction which is the offset direction of the reel
120. For this reason, the detachment restricting portion 112 is provided in the cover 580
located in the direction in which the wire W moves in the lateral direction.
In the accommodation portion 110 with the case 560 closed with the cover 580, the
detachment restricting portion 112 is provided at a position opposite to the flange portion 430
of the reel 120 accommodated in the accommodation portion 110 on the side opposite to the
side where the wire passage 110b is provided with respect to the first support portion 690 and
the second support portion 680. The disengagement restricting portions 112 are provided at
a plurality of locations along the circumferential direction of the reel 120 at predetermined
intervals in a range of about half a circumference in the circumferential direction of the reel
120 indicated by the arrow Q3.
The detachment restricting portion 112 is configured by a convex portion which
protrudes from an inner peripheral surface 580a of the cover 580 along the radial direction of
the reel 120 and includes a proximity portion 112a facing an outer peripheral surface 430a of
the flange portion 430 of the reel 120.
In the detachment restricting portion 112, in a state where the flange portion 420 side
of the hub portion 410 of the reel 120 is supported by the first support portion 690 and the
second support portion 680 enters the concave portion 670 of the outer surface of the flange
portion 430 of the reel 120, and further the flange portion 430 side of the hub portion 410 is
supported by the second support portion 680, the height along the radial direction of the reel
120 is set so that the distance between the proximity portion 112a and the outer peripheral
surface 430a of the flange portion 430 is less than the diameter of the wire W and the
proximity portion 112a does not come in contact with the flange portion 430.
[0053]
Further, the height of the detachment restricting portion 112 along the axial direction
of the reel 120 is set so as not to exceed an inner surface 430b of the flange portion 430.
Further, as illustrated in Figs. 7A, 7B, 8, and 9, the accommodation portion 110
includes a guide portion 114 which guides the reel 120 accommodated in the accommodation
portion 110. The guide portion 114 is provided on a side of the cover 580 where the hinge
portion 610 is provided. Further, in the cover 580, the guide portion 114 may be provided on
the side opposite to the side where the hinge portion 610 is provided with respect to the
second support portion 680.
The guide portion 114 is configured by a convex portion which protrudes from the
inner peripheral surface 580a of the cover 580 along the radial direction and the axial
direction of the reel 120. The guide portion 114 includes a proximity portion 114a facing the
outer peripheral surface 430a of the flange portion 430 of the reel 120. The guide portion
114 includes a slope 114b which is formed of a surface that is continuous from the proximity
portion 114a and guides the reel 120 toward the proximity portion 114a when the flange
portion 430 of the reel 120 comes in contact therewith.
[0056]
In a state where the flange portion 420 side of the hub portion 410 of the reel 120 is
supported by the first support portion 690 and the flange portion 430 side of the hub portion
410 of the reel 120 is supported by the second support portion 680, the guide portion 114 is
set to have a height along the radial direction of the reel 120 so that the distance between the
proximity portion 114a and the outer peripheral surface 430a of the flange portion 430 is
smaller than the diameter of the wire W and the proximity portion 114a does not come in
contact with the flange portion 430.
As illustrated in Figs. 6, 7A, 7B, and 8, the accommodation portion 110 includes a
hard member 113 which suppresses wear of the second support portion 680 provided on the
cover 580. The hard member 113 is made of, for example, a metal rod-shaped member
which is harder and has higher wear resistance than the resin which forms the cover 580.
The hard members 113 are provided at a plurality of predetermined locations along
the circumferential direction of the second support portion 680 so as to be exposed on the
outer periphery of the second support portion 680. The position where the hard member 113
is provided is a side far from the wire passage 110b. That is, the hard member 113 is
provided on the opposite side of the wire passage 110b with respect to the center of the
second support portion 680. This is because, in the operation of feeding the wire W in the
forward direction, a portion where the reel 120 slides with respect to the second support
portion 680 is mainly a portion far from the wire passage 110b. The hard member 113 may
be a plate-shaped metal other than a rod-shaped metal or may be a metal roller rotatable along
the sliding direction of the reel 120.
<Operation>
Next, an operation of binding the reinforcing bar S with two wires W by the
reinforcing bar binding machine 1A of the embodiment will be described with reference to the
drawings.
In the reinforcing bar binding machine 1A, when the wire W is pinched between the
pair of feeding gears 170 and the trigger 12A is operated, the feeding gear 170 rotates in the
forward direction and the two wires W are fed in the forward direction indicated by the arrow
F.
The wire W fed in the forward direction passes through a portion between the first
movable grip member 70L and the fixed grip member 70C and has a curl along the periphery
of the reinforcing bar S by passing through the curl guide portion 5A. The wire W having
the curl added by the first guide portion 50 is guided to a portion between the second movable
grip member 70R and the fixed grip member 70C by the second guide portion 51. When the
end portion of the wire W is fed to a predetermined position, the loop Ru is formed.
After the feed of the wire W is stopped, the grip portion 70 is operated and the first
movable grip member 70L and the second movable grip member 70R are moved in the
direction of the fixed grip member 70C, and then the end portion of the wire W is gripped.
When the wire W is gripped by the grip portion 70, the feeding gear 170 is rotated in the
reverse direction and the wire W is fed in the reverse direction indicated by the arrow R. In
the operation of feeding the wire W in the reverse direction, the wire W is wrapped so as to be
in close contact with the reinforcing bar S.
After wrapping the wire W around the reinforcing bar S and stopping the feeding of
the wire W, the wire W is cut by a cutting unit (not illustrated). After cutting the wire W, the
end portion of the wire W is bent to the reinforcing bar S side. Then, the grip portion 70
gripping the wire W is rotated and the wire W is twisted. After twisting the wire W, the first
movable grip member 70L and the second movable grip member 70R are moved away from
the fixed grip member 70C to release the grip of the wire W.
<Effect>
According to the embodiment, the following effects can be obtained for the problems
of the related art.
As described above, in order to pull back the wire W and wrap it around the
reinforcing bar S, in the operation of feeding the wire W in the reverse direction indicated by
the arrow R, the reel 120 does not rotate. Therefore, the wire W of the portion wound
around the reel 120 bends in the direction of spreading as indicated by the arrow R1 along the
radial direction of the reel 120 indicated by the arrow Q1. Further, the bent portion of the
wire W comes in contact with the inner wall portion 510 on the opposite side of the
accommodation portion 110 from the side where the wire passage 110b is provided with
respect to the first support portion 690 and the second support portion 680.
When the bent portion of the wire W is in contact with the inner wall portion 510 and
the wire W is further fed in the opposite direction indicated by the arrow R, the wire W moves
laterally along the axial direction of the reel 120 indicated by the arrow Q2 in one direction
which is the offset direction of the reel 120 as indicated by the arrow R2 in Fig. 2.
When the wire W is further fed in the reverse direction in a state where the wire W is
in contact with the inner wall portion 510, in the wire W, the portion between the portion
pulled out from the reel 120 and the portion pinched by the wire feeding portion 160 moves in
the direction of the front wall portion 110c of the wire passage 110b as illustrated by the
arrow R3 in Fig. 1. Furthermore, as illustrated by an arrow R4 in Fig. 2, it bends in the
direction of the side wall portion 110e in the other direction (the direction opposite to the
offset direction).
In the operation for feeding the wire W in the reverse direction, when a portion
between the portion of the wire W drawn out from the reel 120 and the portion pinched by the
wire feeding portion 160 bends in the direction of the side wall portion 110e, the wire W
comes into contact with the restricting portion 111.
In Fig. 5, L1 and L2 indicate the length between the fulcrums when the wire W
moves in the direction opposite to the offset direction and comes into contact with the side
wall portion 110e and the like. L1 indicates the fulcrum length when the restricting portion
111 is provided and L2 indicates the fulcrum length when the restricting portion 111 is not
provided.
Since the buckling load required to buckle the wire W is inversely proportional to the
square of the fulcrum length, buckling becomes difficult to occur by shortening the fulcrum
length. As illustrated in Fig. 5, by providing the restricting portion 111, the wire W moves in
the direction opposite to the offset direction and comes into contact with the restricting
portion 111. Therefore, the restricting portion 111 serves as a fulcrum for supporting the
wire W and the fulcrum length becomes shorter than that in a case where there is no
restricting portion.
Thereby, when a force for bending the wire W is applied, the wire W becomes
difficult to bend and the wire W is prevented from bending in the direction of the side wall
portion 110e. Therefore, the amount of bending of the wire W is reduced, and thus the
occurrence of buckling is suppressed.
Also, the restricting portion 111 includes the restricting convex portion 111b in order
to restrict the wire W in contact with the restricting surface 111a from coming off the
restricting surface 111a. Therefore, the restricting surface 111a has a concave shape and the
wire W in contact with the restricting surface 111a is prevented from bending beyond the
restricting portion 111 in the direction of the side wall portion 110e, so that the amount of
bending is reduced.
Since the amount of bending of the wire W is reduced, it is possible to suppress the
wires W from being entangled with each other and to suppress occurrence of wire feeding
failure. In particular, in the configuration in which two wires W are fed, the order in which
the wire W is wound is suppressed from being disrupted, such as a state where the two wire W
cross each other or a state where the two wire W are separated from each other, and the
entanglement of the wires W is suppressed.
Then, by reducing the amount of bending of the wire W, the wire W at a portion in
contact with the inner wall portion 510 is suppressed from further laterally moving in the
offset direction of the reel 120, and thus the wire W that has moved in the lateral direction is
unlikely to exceed the flange portion 430 of the reel 120.
As described above, the restricting portion 111 is provided with the restricting
convex portion 111b on the restricting surface 111a, so that the wire W in contact with the
restricting surface 111a is restricted from coming off the restricting surface 111a. When the
restricting portion 111 having such a shape is provided on the cover 580, when the cover 580
is opened, the wire W is caught on the restricting convex portion 111b of the restricting
portion 111 and this makes it difficult to open the cover 580.
[0076]
Therefore, the cover 580 which can be opened or closed is provided on the side
where the reel 120 is offset and the restricting portion 111 is provided in the case 560 on the
opposite side to the side where the wire W is offset, which is the direction in which the wire
W is bent by being fed in the reverse direction. This suppresses the opening or closing of the
cover 580 from being hindered by the restricting portion 111.
Further, the accommodation portion 110 includes the detachment restricting portion
112 which suppresses the wire W moved laterally from exceeding the flange portion 430 of
the reel 120. In the operation of feeding the wire W in the reverse direction indicated by the
arrow R, as illustrated in Fig. 6, the wire W of the part wound around the reel 120 bends in the
direction of spreading as indicated by the arrow R1 along the radial direction of the reel 120
indicated by the arrow Q1 and the bent portion of the wire W comes in contact with the inner
wall portion 510 on the opposite side of the accommodation portion 110 from the side where
the wire passage 110b is provided with respect to the first support portion 690 and the second
support portion 680 illustrated in Fig. 2.
When the bent portion of the wire W is in contact with the inner wall portion 510 as
illustrated in Fig. 6 and the wire W is further fed in the reverse direction, the wire W moves
laterally along the axial direction of the reel 120 indicated by the arrow Q2 in the direction of
the flange portion 430 of the reel 120 as indicated by the arrow R2 in Fig. 6.
Therefore, the wire W easily exceeds the flange portion 430 in a range E1 illustrated
in Fig. 8 on the side opposite to the side where the wire passage 110b is provided with respect
to the first support portion 690 and the second support portion 680.
The detachment restricting portion 112 is provided on the opposite side to the side
where the wire passage 110b is provided with respect to the first support portion 690 and the
second support portion 680 and is provided in a range of about half a circumference in the
circumferential direction of the reel 120. In the detachment restricting portion 112, the
proximity portion 112a faces the outer peripheral surface 430a of the flange portion 430.
The detachment restricting portion 112 is configured such that the distance between the
proximity portion 112a and the outer peripheral surface 430a of the flange portion 430 is set
to be smaller than the diameter of the wire W. Therefore, the wire W which has moved in
the lateral direction is prevented from exceeding the flange portion 430 of the reel 120.
The height of the detachment restricting portion 112 along the radial direction of the
reel 120 is set so that the proximity portion 112a does not come in contact with the flange
portion 430. However, there is a possibility that the detachment restricting portion 112 and
the flange portion 430 may come into contact with each other due to backlash due to a
dimensional error between the reel 120 and the cover 580.
When the detachment restricting portion 112 and the flange portion 430 come into
contact with each other in the operation of feeding the wire W in the forward direction, the
rotation of the reel 120 driven by the feeding of the wire W is hindered. When the
detachment restricting portion 112 is provided in a continuous form in the circumferential
direction of the reel 120, when the detachment restricting portion 112 and the flange portion
430 come into contact with each other, the resistance increases, and thus the rotation of the
reel 120 is further hindered.
In the operation of feeding the wire W in the forward direction, when the rotation of
the reel 120 is hindered, there is a possibility that the wire W of the portion pulled out from
the reel 120 may be in a state called a bite between the wires W of the portion wound around
the reel 120.
Therefore, the detachment restricting portions 112 are not provided on the wire
passage 110b side with respect to the first support portion 690 and the second support portion
680, in which the wire W is unlikely to come off the flange portion 430. Also, the
detachment restricting portions 112 are provided at a plurality of locations along the
circumferential direction of the reel 120 at predetermined intervals in a range of about half a
circumference in the circumferential direction of the reel 120. Thus, even when the
detachment restricting portion 112 and the flange portion 430 come into contact with each
other, the rotation of the reel 120 is prevented from being hindered, and the biting of the wire
W is suppressed.
Also, the reel 120 is supported by the cover 580 when the second support portion 680
provided in the cover 580 enters the concave portion 670. When the second support portion
680 wears due to the rotation of the reel 120, the distance between the detachment restricting
portion 112 and the flange portion 430 is widened and the wire W may be interposed between
the detachment restricting portion 112 and the flange portion 430.
Therefore, the hard member 113 is provided in the second support portion 680 of the
cover 580. In the operation of feeding the wire W in the forward direction, by providing the
hard member 113 in the second support portion 680 on the far side with respect to the wire
passage 110b where the reel 120 slides with respect to the second support portion 680, the
wear of the second support portion 680 is suppressed. As a result, the distance between the
detachment restricting portion 112 and the flange portion 430 can be maintained.
To accommodate the reel 120 in the accommodation portion 110, the cover 580 is
opened and the hub portion 410 of the reel 120 is inserted into the first support portion 690.
When the cover 580 is opened in a state where the hub portion 410 of the reel 120 is
supported by the first support portion 690, the position of a part of the reel 120 which is the
part not supported by the first support portion 690 is shifted by the weight of the reel 120.
When the cover 580 is closed in such a state, in the accommodation portion 110, the
slope 114b of the guide portion 114 located on the hinge portion 610 side comes into contact
with the outer peripheral surface 430a of the flange portion 430 of the reel 120, which is
located on the hinge portion 610 side. Then, by further closing the cover 580, the flange
portion 430 of the reel 120 is guided by the slope 114b toward the proximity portion 114a.
As a result, the radial position of the reel 120 is adjusted and the second support portion 680
of the cover 580 enters the concave portion 670 of the reel 120. In a configuration in which
the guide portion 114 is also provided on the opposite side to the side where, in the cover
portion 580, the hinge portion 610 is provided with respect to the second support portion 680,
at an end step of the operation for closing the cover 580, the slope 114b of the guide portion
114 located on the opposite side to the side where the hinge portion 610 is provided may
come into contact with the outer peripheral surface 430a of the flange portion 430 of the reel
120, which is located on the side opposite to the side where the hinge portion 610 is located in
the accommodation portion 110. As a result, the radial position of the reel 120 is adjusted.
In this way, by the operation for closing the cover 580, the radial position of the reel
120 is guided by the guide portion 114 provided on the cover 580 such that the concave
portion 670 provided on the flange portion 430 of the reel 120 enters the second support
portion 680 provided on the cover 580.
As illustrated in Fig. 10, as similar to the guide portion 114, the detachment
restricting portion 112 may be configured by a convex portion which protrudes from the inner
peripheral surface 580a of the cover 580 along the radial direction and the axial direction of
the reel 120.
Claims (9)
1. A binding machine, comprising: an accommodation portion accommodating a reel around which a wire is wound; 5 a wire feeding portion configured to feed the wire wound around the reel in a forward direction, winds the wire around a binding object, feeds the wire wound around the binding object in a reverse direction, and wraps the wire around the binding object; and a torsion portion configured to twist the wire, wherein the accommodation portion accommodates the reel in such a manner that the reel is 10 offset in one direction along an axial direction of the reel rotated by the wire being fed with respect to the wire feeding portion, and further comprising a restricting portion, in a wire passage between the reel accommodated in the accommodation portion and the wire feeding portion, which protrudes inward of the accommodation portion and has a restricting surface with which the wire bent in 15 the other direction along the axial direction of the reel between the reel and the wire feeding portion comes in contact.
2. The binding machine according to claim 1, wherein the restricting portion protrudes from a side wall opposite to a side where the reel is 20 offset along an offset direction of the reel.
3. The binding machine according to claim 1 or 2, wherein the restricting portion protrudes from a front wall portion of the reel in a direction intersecting the offset direction of the reel.
4. The binding machine according to any one of claims 1 to 3, wherein the restricting portion includes a restricting convex portion which protrudes from the restricting surface and is provided along the restricting surface, and the restricting surface has a concave shape.
5. The binding machine according to any one of claims 1 to 4, wherein the accommodation portion includes a case in which the reel is accommodated and a cover which is openable and provided on a side where the reel is offset with respect to the case, and the restricting portion is provided in the case.
6. The binding machine according to any one of claims 1 to 5, wherein 5 the accommodation portion includes a support portion capable of supporting the reel, and detachment restricting portions protruding along a radial direction of the reel at positions facing the an peripheral surface of one flange portion of the reel located on the side where the reel is offset, on a side opposite to a side where the wire passage is provided with 10 respect to the support portion, and the detachment restricting portions are provided at a plurality of locations along a circumferential direction of the reel at intervals.
7. The binding machine according to any one of claims 1 to 6, wherein 15 the accommodation portion includes a cover which opens and closes the accommodation portion and has a support portion capable of supporting the reel, and the cover has a hard member which is exposed to an outer periphery of the support portion and is harder than the support portion. 20
8. The binding machine according to claim 7, wherein the hard member is made of metal.
9. The binding machine according to any one of claims 1 to 8, wherein the wire includes two or more wires which are wound around the reel and are capable 25 of being pulled out.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019-023659 | 2019-02-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
NZ761705A true NZ761705A (en) | 2020-02-28 |
Family
ID=
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