Binding machine

Abstract

This reinforcement binding machine comprises: a curl formation part constituting an annular feed path for winding a wire around a reinforcement; and a distal-end guide part against which the reinforcement is abutted and which supports the curl formation part. The curl formation part is provided with an arm part for forming a curl in the wire, and a curl guide part for guiding the wire curled by the arm part. The distal-end guide part is provided with an abutment part against which the reinforcement is abutted, an arm support part supported by the arm part, a curl guide support part supported by the curl guide part, and a body support part supported by a body part.

Description

tying machine

[0001] The present disclosure relates to a binding machine that binds objects such as reinforcing bars with wire.

[0002] Steel bars are used in concrete structures to increase their strength, and are tied together with wire to prevent the bars from shifting from their designated positions when the concrete is poured.

[0003] BACKGROUND ART Conventionally, a binding machine known as a reinforcing bar binding machine has been proposed, which wraps wire around two or more reinforcing bars and twists the wire wrapped around the reinforcing bars to bind the two or more reinforcing bars with the wire.

[0004] As the diameter of the reinforcing bars to be bound with the wire increases, the diameter of the feed path for the wire wound around the reinforcing bars must be increased. Therefore, a reinforcing bar binding machine has been proposed that can reliably guide the wire to the binding section even when the diameter of the feed path for the wire wound around the reinforcing bars increases (see, for example, Patent Document 1).

[0005] Japanese Patent No. 7302302

[0006] In order to increase the diameter of the wire feed path that becomes the loop, it is necessary to increase the diameter of the curl forming section that curls the wire. However, in order to increase the diameter and maintain bundling stability, the tip of the curl forming section must be longer than before. However, as the length of the curl forming section increases, the possibility of misalignment between the curl forming sections increases, and the force applied to the curl forming section due to a drop or collision also increases.

[0007] An object of the present disclosure is to provide a binding machine that can firmly hold a curl forming section.

[0008] One aspect of the present disclosure is a binding machine that wraps a wire around an object to be bound, the binding machine having a main body, an arm attached to the main body to curl the wire, and a curl guide attached to the main body to guide the wire curled by the arm to the binding section, and is equipped with a regulating means for regulating relative displacement between the arm and the curl guide.

[0009] Another aspect of the present disclosure is a binding machine that winds a wire around an object to be bound, the binding machine having a main body, an arm attached to the main body to impart a curl to the wire, and a curl guide attached to the main body, and is equipped with a support member that supports the main body and at least one of the arm and curl guide.

[0010] In the present disclosure, relative displacement between the arm portion and the curl guide portion can be restricted. Furthermore, in the present disclosure, the arm portion and the curl guide portion can be firmly held. Furthermore, when feeding out or receiving the wire during bundling, the arm portion and the curl guide portion are prevented from unintentionally moving, such as wobbling, allowing for stable bundling. Furthermore, even if an impact is applied to the arm portion and the curl guide portion due to a fall or collision, damage such as deformation of the curl forming portion can be suppressed.

[0011] 1 is a side view showing an example of a reinforcing bar binding machine according to the present embodiment; FIG. 2 is a perspective view of a main part showing an example of a reinforcing bar binding machine according to the present embodiment; FIG. 3 is an internal configuration diagram seen from the side showing an example of a reinforcing bar binding machine according to the present embodiment; FIG. 4 is a side view of a main part showing an example of a reinforcing bar binding machine according to the present embodiment, seen from one side; FIG. 5 is a side view of a main part showing an example of a reinforcing bar binding machine according to the present embodiment, seen from one side, with a tip guide part removed; FIG. 6 is a side view of a main part showing an example of a reinforcing bar binding machine according to the present embodiment, seen from the other side; FIG. 7 is a side view of a main part showing an example of a reinforcing bar binding machine according to the present embodiment, seen from the other side, with a tip guide part removed; FIG. 8 is a perspective view showing an example of a tip guide part; FIG. 9 is a side view of a main part showing another example of a reinforcing bar binding machine according to the present embodiment, seen from one side; FIG. 10 is a side view of a main part showing yet another example of a reinforcing bar binding machine according to the present embodiment, seen from one side;

[0012] Hereinafter, 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.

[0013] <Configuration example of a reinforcing bar binding machine according to this embodiment> Figure 1 is a side view showing an example of a reinforcing bar binding machine according to this embodiment, Figure 2 is a perspective view of the main parts of an example of a reinforcing bar binding machine according to this embodiment, and Figure 3 is an internal configuration diagram seen from the side showing an example of a reinforcing bar binding machine according to this embodiment.

[0014] The reinforcing bar binding machine 1A is designed to be held by an operator and includes a main body 10 and a handle 11. The reinforcing bar binding machine 1A feeds a wire W in the forward direction indicated by an arrow F to wind it around the reinforcing bar S to be bound, and then feeds the wire W wound around the reinforcing bar S in the reverse direction indicated by an arrow R to wind it around the reinforcing bar S, and then twists the wire W to bind the reinforcing bar S with the wire W. The reinforcing bar binding machine 1A binds the reinforcing bars S with multiple wires W, two wires W in this example.

[0015] To achieve the above-mentioned functions, the reinforcing bar binding machine 1A includes a magazine 2 that stores the wire W, a wire feeding unit 3 that feeds the wire W, and a wire guide unit 4 that guides the wire W fed to the wire feeding unit 3. The reinforcing bar binding machine 1A also includes a curl forming unit 5 that forms a circular feeding path for winding the wire W fed by the wire feeding unit 3 around the reinforcing bar S, and a cutting unit 6 that cuts the wire W wound around the reinforcing bar S. The reinforcing bar binding machine 1A also includes a binding unit 7 that twists the wire W wound around the reinforcing bar S, and a drive unit 8 that drives the binding unit 7. The reinforcing bar binding machine 1A also includes tip guide units 9L and 9R against which the reinforcing bar S is abutted and that support the curl forming unit 5.

[0016] In the rebar binding machine 1A, the axial direction of the binding unit 7, which is driven and rotated by the drive unit 8, is indicated by arrow X, and the direction of arrow X along the axial direction of the binding unit 7 is referred to as the front-to-rear direction, and the side on which the curl forming unit 5 is provided is referred to as the front side. Also, in the rebar binding machine 1A, the direction that intersects with the axial direction of the binding unit 7 and follows the direction in which the handle unit 11 extends is indicated by arrow Z, and the direction of arrow Z is referred to as the up-down direction. Furthermore, in the rebar binding machine 1A, the direction that intersects with the axial direction of the binding unit 7 and the direction in which the handle unit 11 extends is indicated by arrow Y, and the direction of arrow Y is referred to as the left-to-right direction.

[0017] The magazine 2 is an example of a storage section, and rotatably and detachably stores a reel 20 around which a long wire W is wound so that it can be unwound. The wire W is an example of a consumable item. The wire W may be a wire made of a metal wire that can be plastically deformed, a metal wire coated with resin, or a twisted wire. In a configuration in which two wires W are used to bind reinforcing bars S, the reel 20 has two wires W wound around it, and the two wires W can be pulled out from the reel 20 at the same time.

[0018] The wire feeding unit 3 includes a pair of feed gears 30 that clamp and feed the wire W. The rotation of a feed motor (not shown) is transmitted to the feed gear 30, causing the feed gear 30 to rotate. The wire feeding unit 3 also switches the rotation direction of the feed gear 30 by switching the rotation direction of the feed motor (not shown) between forward and reverse, thereby switching the forward and reverse feed direction of the wire W. In a configuration in which reinforcing bars S are bound with two wires W, the wire feeding unit 3 feeds the two wires W aligned in the radial direction of the wires W.

[0019] The wire guide units 4 are disposed upstream and downstream of the feed gears 30 with respect to the feed direction of the wire W fed in the forward direction. In a configuration in which two wires W are used to bind reinforcing bars S, the wire guide units 4 guide the two incoming wires W between the pair of feed gears 30 by aligning them in the direction in which the pair of feed gears 30 are aligned.

[0020] The curl forming unit 5 includes an arm unit 50 that curls the wire W fed by the wire feeding unit 3, and a curl guide unit 51 that guides the wire W curled by the arm unit 50 to the bundling unit 7. The curl forming unit 5 curls the wire W fed by the wire feeding unit 3 and passing through the arm unit 50, thereby forming a circular feed path Ru as shown by the two-dot chain line that runs from the arm unit 50 through the curl guide unit 51 to the bundling unit 7.

[0021] The arm unit 50 has a groove formed in it along the circumferential direction of the annular feed path Ru, the groove having a width that allows the wire W to pass through. In a configuration in which two wires W are used to bind reinforcing bars S, the arm unit 50 aligns the two entering wires W in a direction that aligns along the axial direction of the annular feed path Ru. The arm unit 50 also has a guide surface forming portion 50g that guides the wires W along the radial direction of the annular feed path Ru. The guide surface forming portion 50g is provided on the radial outside of the annular feed path Ru.

[0022] The curl guide portion 51 has a groove formed along the circumferential direction of the annular feed path Ru, the groove having a width sufficient for the wire W to pass through. The curl guide portion 51 is configured so that the opening on the upstream side with respect to the feed direction of the wire W fed in the forward direction is larger in opening area than the opening on the downstream side, and at least a portion of the inner surface of the opening is tapered. In a configuration in which two wires W are used to bind reinforcing bars S, the curl guide portion 51 aligns the two entering wires W in a direction aligned along the axial direction of the annular feed path Ru. The curl guide portion 51 also includes a guide surface forming portion 51g that guides the wire W along the radial direction of the annular feed path Ru. The guide surface forming portion 51g is provided radially outside the annular feed path Ru.

[0023] The cutting unit 6 includes a fixed blade unit 60, a movable blade unit 61 that cuts the wire W in cooperation with the fixed blade unit 60, and a transmission mechanism 62 that transmits the operation of the binding unit 7 to the movable blade unit 61. The cutting unit 6 cuts the wire W by the rotational operation of the movable blade unit 61 with the fixed blade unit 60 as a fulcrum axis.

[0024] The bundling unit 7 includes a wire locking body 70 to which the wire W is locked, and a sleeve 71 that operates the wire locking body 70. The driving unit 8 includes a torsion motor 80 and a reducer 81 that reduces speed and amplifies torque.

[0025] The rebar binding machine 1A has a handle 11 that extends downward from the main body 10. Furthermore, a battery 15 is detachably attached to the lower part of the handle 11. Furthermore, the rebar binding machine 1A has a magazine 2 provided in front of the handle 11.

[0026] The rebar binding machine 1A has a trigger 12 provided on the front side of a handle portion 11, and a switch 13 provided inside the handle portion 11. In the rebar binding machine 1A, the control unit 100 controls the torsion motor 80 and a feed motor (not shown) according to the state of the switch 13 pressed by operating the trigger 12.

[0027] Fig. 4A is a side view of a main portion of an example of a reinforcing bar binding machine according to this embodiment, as seen from one side, and Fig. 4B is a side view of a main portion of an example of a reinforcing bar binding machine according to this embodiment, as seen from one side, with a tip guide unit removed. Fig. 5A is a side view of a main portion of an example of a reinforcing bar binding machine according to this embodiment, as seen from the other side, and Fig. 5B is a side view of a main portion of an example of a reinforcing bar binding machine according to this embodiment, as seen from the other side, with a tip guide unit removed. Figs. 6A and 6B are perspective views of examples of tip guide units, with Fig. 6A showing an example of tip guide unit 9L and Fig. 6B showing an example of tip guide unit 9R.

[0028] The tip guide portion 9L is an example of a restricting means or a support member, and is provided on one side of the front end portion of the main body portion 10. The tip guide portion 9L includes an abutment portion 9La against which the rebar S abuts, an arm support portion 90L supported by the arm portion 50, a curl guide support portion 91L supported by the curl guide portion 51, and a main body support portion 92L supported by the main body portion 10.

[0029] The abutment portion 9La is provided between the arm portion 50 and the curl guide portion 51 and protrudes forward from the front end of the main body portion 10.

[0030] The arm support portion 90L is an example of a first supported portion, and extends forward from the abutment portion 9La along the arm portion 50. The arm support portion 90L has holes 90La into which screws 90s are inserted. The holes 90La are provided at multiple locations along the direction in which the arm support portion 90L extends.

[0031] The curl guide support portion 91L is an example of a first supported portion, and extends forward from the abutting portion 9La along the curl guide portion 51. The curl guide support portion 91L includes a hole portion 91La into which a screw 91s is inserted.

[0032] The main body support portion 92L is an example of a second supported portion, and connects the arm support portion 90L and the curl guide support portion 91 L. The main body support portion 92L has a hole portion 92La into which a screw 92Ls is inserted.

[0033] The arm support portion 90L extends from the main body support portion 92L as its base end and tapers from the main body support portion 92L toward its tip. That is, the arm support portion 90L has a shape in which the base end is thicker than the tip. Furthermore, the length of the arm support portion 90L along the extension direction of the arm portion 50 is shorter than that of the arm portion 50. Therefore, the arm support portion 90L does not protrude from the tip of the arm portion 50.

[0034] The tip guide portion 9L has bending portions 93L between the arm support portion 90L and the main body support portion 92L, and between the curl guide support portion 91L and the main body support portion 92L. The bending portions 93L are configured by providing bent portions or curved portions that form steps between the arm support portion 90L and the main body support portion 92L, and between the curl guide support portion 91L and the main body support portion 92L.

[0035] The tip guide portion 9R is an example of a restricting means or a support member, and is provided at the other side of the front end of the main body portion 10. The tip guide portion 9R includes an abutment portion 9Ra against which the rebar S abuts, an arm support portion 90R supported by the arm portion 50, a curl guide support portion 91R supported by the curl guide portion 51, and a main body support portion 92R supported by the main body portion 10.

[0036] The abutment portion 9Ra is provided between the arm portion 50 and the curl guide portion 51 and protrudes forward from the front end of the main body portion 10.

[0037] The arm support portion 90R is an example of a first supported portion, and extends forward from the abutment portion 9Ra along the arm portion 50. The arm support portion 90R has screw hole portions 90Ra into which screws 90s are fastened. The screw hole portions 90Ra are provided at multiple locations along the extension direction of the arm support portion 90R, in accordance with the arrangement of the hole portions 90La.

[0038] The curl guide support portion 91R is an example of a first supported portion, and extends forward from the abutment portion 9Ra along the curl guide portion 51. The curl guide support portion 91R has a screw hole portion 91Ra into which a screw 91s is fastened. The screw hole portion 91Ra is provided to match the arrangement of the hole portion 91La.

[0039] The main body support portion 92R is an example of a second supported portion, and connects the arm support portion 90R and the curl guide support portion 91 R. The main body support portion 92R has a hole portion 92Ra into which a screw 92Rs is inserted.

[0040] The arm support portion 90R extends from the main body support portion 92R as its base end and tapers from the main body support portion 92R to its tip. That is, the arm support portion 90R has a shape in which the base end is thicker than the tip. Furthermore, the length of the arm support portion 90R along the extension direction of the arm portion 50 is shorter than that of the arm portion 50. Therefore, the arm support portion 90R does not protrude from the tip of the arm portion 50.

[0041] The tip guide portion 9R has bending portions 93R between the arm support portion 90R and the main body support portion 92R, and between the curl guide support portion 91R and the main body support portion 92R. The bending portions 93R are configured by providing bent portions or curved portions that form steps between the arm support portion 90R and the main body support portion 92R, and between the curl guide support portion 91R and the main body support portion 92R.

[0042] The arm portion 50 has holes 50a into which the screws 90s are inserted. The holes 50a are provided at multiple locations along the extension direction of the arm portion 50 in accordance with the arrangement of the holes 90La and the screw holes 90Ra. The holes 50a are provided radially outside the annular feed path Ru and penetrate the guide surface forming portion 50g. As a result, the holes 50a are not exposed to the annular feed path Ru.

[0043] The curl guide portion 51 has a hole 51a into which the screw 91s is inserted. The hole 51a is provided to match the arrangement of the hole 91La and the screw hole 91Ra. The hole 51a is provided radially outside the annular feed path Ru and penetrates the guide surface forming portion 51g. As a result, the hole 51a is not exposed to the annular feed path Ru.

[0044] The main body 10 includes a main body-side arm support portion 95 that supports the arm portion 50, and a main body-side curl guide support portion 96 that supports the curl guide portion 51. The main body 10 also includes a main body-side tip guide support portion 97L that supports the tip guide portion 9L, and a main body-side tip guide support portion 97R that supports the tip guide portion 9R.

[0045] The main body-side arm support part 95 is provided rearward of the front end part P1 of the main body part 10 along the axial direction of the binding part 7, on the opposite side to the side where the wire feeding part 3 and the cutting part 6 are provided (above the binding part 7). The main body-side arm support part 95 supports the arm part 50 with a screw 95a. The screw 95a is an example of a first support part, and supports the arm part 50 to the main body part 10 by being fastened to a female threaded part (not shown).

[0046] The main body curl guide support part 96 is provided rearward of the front end part P1 of the main body 10 in the axial direction of the binding part 7, on the side where the wire feeding part 3 and the cutting part 6 are provided (below the binding part 7). The main body curl guide support part 96 supports the curl guide part 51 with screws 96La and 96Ra. The screws 96La and 96Ra are an example of a first support part, and support the curl guide part 51 on the main body 10 by fastening them to a female threaded part (not shown).

[0047] The main body-side tip guide support portion 97L is provided rearward of the front end portion P1 of the main body 10 along the axial direction of the binding portion 7, on one side intersecting with the axial direction of the binding portion 7. The main body-side tip guide support portion 97L supports the tip guide portion 9L with a screw 92Ls. The screw 92Ls is an example of a third support portion, and supports the tip guide portion 9L to the main body 10 by being fastened to a fastening portion (not shown) provided on the main body 10.

[0048] The main body-side tip guide support portion 97R is provided rearward of the front end portion P1 of the main body 10 along the axial direction of the binding portion 7, on the other side intersecting with the axial direction of the binding portion 7. The main body-side tip guide support portion 97R supports the tip guide portion 9R with a screw 92Rs. The screw 92Rs is an example of a third support portion, and supports the tip guide portion 9R to the main body 10 by fastening it to a fastening portion 97Rb (shown in FIG. 2) provided on the main body 10. The fastening portion 97Rb may be in the form of a nut embedded in the main body 10.

[0049] When the tip guide portion 9L is supported by the main body side tip guide support portion 97L, the arm support portion 90L is located forward of the main body side arm support portion 95 and the screw 95a along the axial direction of the binding portion 7. Furthermore, when the tip guide portion 9L is supported by the main body side tip guide support portion 97L, the arm support portion 90L is located to one side of the arm portion 50, intersecting with the axial direction of the binding portion 7.

[0050] Furthermore, when the tip guide portion 9R is supported by the main body side tip guide support portion 97R, the arm support portion 90R is located forward of the main body side arm support portion 95 and the screw 95a along the axial direction of the binding portion 7. Furthermore, when the tip guide portion 9R is supported by the main body side tip guide support portion 97R, the arm support portion 90R is located on the other side of the arm portion 50, intersecting with the axial direction of the binding portion 7.

[0051] Therefore, the arm support portion 90L of the tip guide portion 9L and the arm support portion 90R of the tip guide portion 9R are provided on both side surfaces of the arm portion 50, and the arm portion 50 is sandwiched between the arm support portion 90L of the tip guide portion 9L and the arm support portion 90R of the tip guide portion 9R.

[0052] A screw 90s is passed through the hole 90La of the arm support portion 90L. The screw 90s is an example of a second support portion, and the screw 90s passed through the hole 90La passes through the hole 50a of the arm portion 50 and is fastened to the screw hole 90Ra of the arm support portion 90R.

[0053] As a result, the arm portion 50 is sandwiched between the arm support portion 90L of the tip guide portion 9L and the arm support portion 90R of the tip guide portion 9R, and is supported by the arm support portions 90L and 90R via the screws 90s.

[0054] Therefore, the arm unit 50 is supported in front of the binding unit 7 in the axial direction by the main body-side arm support part 95 and the screw 95a, with the tip guide part 9L supported by the screw 90s via the arm support part 90L. Also, the arm unit 50 is supported in front of the binding unit 7 in the axial direction by the main body-side arm support part 95 and the screw 95a, with the tip guide part 9R supported by the screw 90s via the arm support part 90R.

[0055] Furthermore, when the tip guide portion 9L is supported by the main body side tip guide support portion 97L, the curl guide support portion 91L is located forward of the main body side curl guide support portion 96 and the screw 96La along the axial direction of the binding portion 7. Also, when the tip guide portion 9L is supported by the main body side tip guide support portion 97L, the curl guide support portion 91L is located to one side of the curl guide portion 51, intersecting with the axial direction of the binding portion 7.

[0056] Furthermore, when the tip guide portion 9R is supported by the main body side tip guide support portion 97R, the curl guide support portion 91R is located forward of the main body side curl guide support portion 96 and the screw 96Ra along the axial direction of the binding portion 7. Furthermore, when the tip guide portion 9R is supported by the main body side tip guide support portion 97R, the curl guide support portion 91R is located on the other side of the curl guide portion 51, intersecting with the axial direction of the binding portion 7.

[0057] Therefore, the curl guide support portion 91L of the tip guide portion 9L and the curl guide support portion 91R of the tip guide portion 9R are provided on both side surfaces of the curl guide portion 51, and the curl guide portion 51 is sandwiched between the curl guide support portion 91L of the tip guide portion 9L and the curl guide support portion 91R of the tip guide portion 9R.

[0058] A screw 91s is inserted through a hole 91La in the curl guide support portion 91L. The screw 91s is an example of a second support portion, and the screw 91s inserted through the hole 91La passes through a hole 51a in the curl guide portion 51 and is fastened to a screw hole 91Ra in the curl guide support portion 91R.

[0059] As a result, the curl guide portion 51 is sandwiched between the curl guide support portion 91L of the tip guide portion 9L and the curl guide support portion 91R of the tip guide portion 9R, and is supported by the curl guide support portions 91L and 91R via screws 91s.

[0060] Therefore, the curl guide unit 51 is supported in front of the axial direction of the binding unit 7 by the main body-side curl guide support portion 96 and the screw 96La, with the tip guide portion 9L supported by the screw 91s via the curl guide support portion 91L. Furthermore, the curl guide unit 51 is supported in front of the axial direction of the binding unit 7 by the main body-side curl guide support portion 96 and the screw 96Ra, with the tip guide portion 9R supported by the screw 91s via the curl guide support portion 91R. Here, "support" refers to preventing relative movement between the arm unit 50 and the main body 10, the curl guide unit 51 and the main body 10, and the arm unit 50 and the curl guide unit 51, such as movement in the X, Y, and Z directions or rotational movement, and also includes fixing objects to each other. However, this may also include unavoidable movement or movement that does not affect function.

[0061] <Example of Function and Effect of Rebar Binding Machine of Present Embodiment> As described above, the arm unit 50 is supported on the main body unit 10 by the body-side arm support portion 95 with the screw 95a, and is also supported on the tip guide unit 9L via the arm support portion 90L with the screw 90s at the front along the axial direction of the binding unit 7 by the body-side arm support portion 95 and the screw 95a. The tip guide unit 9L is supported on the main body unit 10 by the body-side tip guide support portion 97L with the screw 92Ls. As a result, the arm unit 50 is supported on the main body unit 10 by the body-side arm support portion 95 with the tip guide 9L at the front along the axial direction of the binding unit 7 by the body-side tip guide support portion 97L.

[0062] Furthermore, the arm unit 50 is supported on the tip guide unit 9R via the arm support unit 90R and the screw 90s at the front along the axial direction of the binding unit 7 by the main body-side arm support unit 95 and the screw 95a. The tip guide unit 9R is supported on the main body unit 10 by the main body-side tip guide support unit 97R and the screw 92Rs. As a result, the arm unit 50 is supported on the main body unit 10 by the main body-side tip guide support unit 97R via the tip guide 9R at the front along the axial direction of the binding unit 7 by the main body-side arm support unit 95.

[0063] Therefore, the arm portion 50 constituting the curl forming unit 5 is supported by the screws 90s, 95a, which are multiple support portions. This allows the arm portion 50 to be firmly held. In addition, when feeding out the wire W during bundling, the arm portion 50 is prevented from unintentionally moving, such as wobbling, allowing for stable bundling. Furthermore, even if the arm portion 50 is subjected to an impact due to a fall or collision, damage such as deformation of the arm portion 50 can be suppressed.

[0064] The curl guide unit 51 is supported on the main body 10 by the main body-side curl guide support portion 96 via screws 96La and 96Ra, and is supported on the tip guide unit 9L via the curl guide support portion 91L via the main body-side curl guide support portion 96 and the screws 96La and 96Ra at a position forward in the axial direction of the binding unit 7. The tip guide unit 9L is supported on the main body 10 by the main body-side tip guide support portion 97L via the screw 92Ls. As a result, the curl guide unit 51 is supported on the main body 10 by the main body-side curl guide support portion 96 via the tip guide unit 9L at a position forward in the axial direction of the binding unit 7.

[0065] Furthermore, the curl guide unit 51 is supported on the tip guide unit 9R via the curl guide support unit 91R and the main body side curl guide support unit 96 and the screws 96La and 96Ra at a front portion along the axial direction of the binding unit 7 by the screw 91s. The tip guide unit 9R is supported on the main body unit 10 by the main body side tip guide support unit 97R and the screw 92Rs. As a result, the front portion of the curl guide unit 51 along the axial direction of the binding unit 7 is supported on the main body unit 10 by the main body side tip guide support unit 97R via the tip guide unit 9R.

[0066] Therefore, the curl guide portion 51 constituting the curl forming unit 5 is supported by the screws 91s, 96La, and 96Ra, which are multiple support portions. This allows the curl guide portion 51 to be firmly held in place. Furthermore, when receiving the wire W during bundling, the curl guide portion 51 is prevented from unintentionally moving, such as wobbling, allowing for stable bundling. Furthermore, even if the curl guide portion 51 is subjected to an impact due to a fall or collision, damage such as deformation of the curl guide portion 51 can be suppressed.

[0067] Furthermore, relative displacement between the arm 50 constituting the curl forming unit 5 and the main body 10 is regulated by screws 90s, 95a serving as support means and tip guides 9L, 9R serving as regulating means. Furthermore, relative displacement between the curl guide 51 constituting the curl forming unit 5 and the main body 10 is regulated by screws 91s, 96La, 96Ra serving as support means and tip guides 9L, 9R serving as regulating means. Furthermore, relative displacement between the arm 50 and the curl guide 51 is regulated by tip guides 9L, 9R serving as regulating means.

[0068] This allows the arm portion 50 and the curl guide portion 51 to be firmly held in place. In addition, stable bundling is possible by preventing the arm portion 50 and the curl guide portion 51 from wobbling or moving unintentionally when feeding out or receiving the wire W during bundling. Furthermore, even if an impact is applied to the arm portion 50 and the curl guide portion 51 due to a fall or collision, damage such as deformation of the arm portion 50 and the curl guide portion 51 can be prevented.

[0069] In addition, the tip guide portion 9L has bending portions 93L between the arm support portion 90L and the main body support portion 92L, and between the curl guide support portion 91L and the main body support portion 92L, and the tip guide portion 9R has bending portions 93R between the arm support portion 90R and the main body support portion 92R, and between the curl guide support portion 91R and the main body support portion 92R, so that when an impact is applied to the arm portion 50 and the curl guide portion 51 due to a fall or collision, the impact can be absorbed by the elastic deformation of the bending portions 93L and 93R.

[0070] The tip guide portion 9L is supported on the main body portion 10 by a screw 92Ls, on the arm portion 50 by a screw 90s, and on the curl guide portion 51 by a screw 91s. The tip guide portion 9R is supported on the main body portion 10 by a screw 92Rs, on the arm portion 50 by a screw 90s, and on the curl guide portion 51 by a screw 91s. The abutment portion 9La provided on the tip guide portion 9L and the abutment portion 9Ra provided on the tip guide portion 9R may wear out due to being abutted by the rebar S. Therefore, by detachably supporting the tip guide portions 9L and 9R on the main body portion 10, the arm portion 50, and the curl guide portion 51 by fastening members such as screws, replacement can be easily performed.

[0071] <Modification of the reinforcing bar binding machine of this embodiment> The tip guide portion 9L may be configured to include a butting portion 9La and an arm support portion 90L, but not to include a curl guide support portion 91L. Also, the tip guide portion 9L may be configured to include a butting portion 9La and a curl guide support portion 91L, but not to include an arm support portion 90L. The same applies to the tip guide portion 9R.

[0072] Furthermore, the tip guides 9L and 9R may be made of metal or resin. If the tip guides 9L and 9R and the arm 50 are made of metal, the tip guides 9L and 9R and the arm 50 may be supported by welding or other means without considering attachment / detachment. Similarly, if the tip guides 9L and 9R and the curl guide 51 are made of metal, the tip guides 9L and 9R and the curl guide 51 may be supported by welding or other means without considering attachment / detachment. Furthermore, the tip guides 9L and 9R and the arm 50 may be supported by adhesive or other means without considering attachment / detachment, and the tip guides 9L and 9R and the curl guide 51 may be supported by adhesive or other means without considering attachment / detachment. Furthermore, the tip guides 9L and 9R and the arm 50 may be supported by rivets, caulking, or other means without considering attachment / detachment, and the tip guides 9L and 9R and the curl guide 51 may be supported by rivets, caulking, or other means without considering attachment / detachment.

[0073] In addition, as a form in which a portion of the main body 10 is extended, the arm support portions 90L and 90R may be configured integrally with the main body 10, or the curl guide support portions 91L and 91R may be configured integrally with the main body 10.

[0074] In a known rebar binding machine 1A, the curl guide unit 51 is rotatably supported on the main body curl guide support unit 96 as a fulcrum, and the curl guide unit 51 is biased in a predetermined direction by a biasing member such as a spring. However, as the diameter of the annular feed path Ru that winds the wire W around the rebar S increases, it is desirable for the curl guide unit 51 to be supported so that the wire W, which has been curled by the arm unit 50, is guided to the binding unit 7 by contacting the curl guide unit 51. On the other hand, the curl guide unit 51 may be movable as long as it is biased with a force that does not move the curl guide unit 51 when the wire W contacts it. In this case, it is preferable to support a shaft or the like that movably supports the curl guide unit 51 with the tip guide units 9L and 9R.

[0075] 7 is a side view of the main parts of another example of a reinforcing bar binding machine according to this embodiment, as seen from one side. The reinforcing bar binding machine 1B includes a support member 98L that regulates relative displacement between the arm portion 50 and the curl guide portion 51. A similar support member is also provided on the other side, but this support member on the other side is not shown.

[0076] The support member 98L is an example of a regulating means, and includes an arm support portion 98a supported by the arm portion 50, a curl guide support portion 98b supported by the curl guide portion 51, and a connecting portion 98c connecting the arm support portion 98a and the curl guide support portion 98b.

[0077] The arm support portion 98a of the support member 98L is located forward in the axial direction of the binding unit 7 from the main body arm support portion 95 and the screw 95a shown in FIGS. 5A and 5B . The curl guide support portion 98b of the support member 98L is located forward in the axial direction of the binding unit 7 from the main body curl guide support portion 96 and the screw 96La. The support member 98L is provided on one side of the rebar binding machine 1B, and a support member (not shown) is provided on the other side of the rebar binding machine 1B. As a result, the arm portion 50 is sandwiched between the arm support portions 98a of the pair of support members. The curl guide portion 51 is sandwiched between the curl guide support portions 98b of the pair of support members. The arm support portion 98a is supported on the arm portion 50 by a screw 98s1. The curl guide support portion 98b is supported on the curl guide portion 51 by a screw 98s2. 5A and 5B , the support point by the screw 98s1 is located forward in the axial direction of the binding unit 7 from the main body side arm support part 95 and the screw 95a. In addition, the support point by the screw 98s2 is located forward in the axial direction of the binding unit 7 from the main body side curl guide support part 96 and the screw 96La.

[0078] The support member 98L has bent portions 98e between the arm support portion 98a and the connecting portion 98c, and between the curl guide support portion 98b and the connecting portion 98c.

[0079] The reinforcing bar binding machine 1B includes an abutment portion 98d against which the reinforcing bar S abuts. The abutment portion 98d is provided between the arm portion 50 and the curl guide portion 51, and protrudes forward from the front end of the main body portion 10. The abutment portion 98d is supported on the main body portion 10 by screws 98ds. In the reinforcing bar binding machine 1B, the support member 98L and the abutment portion 98d are configured as separate parts.

[0080] 8 is a side view of the main parts of yet another example of a reinforcing bar binding machine according to the present embodiment, as seen from one side. The reinforcing bar binding machine 1C includes a tip guide portion 9L (9R) against which the reinforcing bar S is butted and which supports the curl forming portion 5. The tip guide portion 9R is not shown in FIG.

[0081] The tip guide portion 9L is an example of a support member, and is provided on one side of the front end portion of the main body portion 10. The tip guide portion 9L includes an abutment portion 9La against which the rebar S abuts, an arm support portion 90L supported by the arm portion 50, a curl guide support portion 91L supported by the curl guide portion 51, and a main body support portion 92L supported by the main body portion 10.

[0082] The abutment portion 9La is provided between the arm portion 50 and the curl guide portion 51 and protrudes forward from the front end of the main body portion 10.

[0083] The arm support portion 90L is an example of a first supported portion, and extends forward from the abutment portion 9La along the arm portion 50. The arm support portion 90L is supported on the arm portion 50 by a screw 90s. The arm support portion 90L has a contact portion 99La with which the rebar S can come into contact. The contact portion 99La protrudes toward the curl guide portion 51 beyond an opposing surface 50h of the arm portion 50 that faces the curl guide portion 51. Note that the contact portion 99La may be flush with the opposing surface 50h.

[0084] The curl guide support portion 91L is an example of a first supported portion, and extends forward from the abutting portion 9La along the curl guide portion 51. The curl guide support portion 91L is supported on the curl guide portion 51 by screws 91s. The curl guide support portion 91L has a contact portion 99Lb with which the rebar S can come into contact. The contact portion 99Lb extends forward from the abutting portion 9La along the curl guide portion 51, and protrudes toward the arm portion 50 beyond an opposing surface 51h of the curl guide portion 51 that faces the arm portion 50. Note that the abutting portion 99Lb may be flush with the opposing surface 51h.

[0085] The main body support portion 92L is an example of a second supported portion, and connects the arm support portion 90L and the curl guide support portion 91 L. The main body support portion 92L is supported on the main body portion 10 by screws 92Ls.

[0086] The tip guide portion 9L has bending portions 93L between the arm support portion 90L and the main body support portion 92L, and between the curl guide support portion 91L and the main body support portion 92L. The bending portions 93L are configured by providing bent portions or curved portions that form steps between the arm support portion 90L and the main body support portion 92L, and between the curl guide support portion 91L and the main body support portion 92L.

[0087] In the rebar binding machine 1C, when the rebar S is inserted between the arm unit 50 and the curl guide unit 51, the rebar S may come into contact with the abutment portions 99La and 99Lb. Providing the abutment portions 99La and 99Lb prevents the rebar S from coming into contact with the arm unit 50 and the curl guide unit 51. Furthermore, if the abutment portions 99La and 99Lb become worn due to the rebar S coming into contact with them, the tip guide unit 9L can be replaced, thereby preventing wear on the arm unit 50 and the curl guide unit 51. Either the abutment portion 99La or the abutment portion 99Lb may be provided.

[0088] FIG. 9 is a side view of the main part of yet another example of the reinforcing bar binding machine of this embodiment, seen from one side.

[0089] In the rebar binding machine 1D, the tip guide portion 99L has a recess 99Lc. The recess 99Lc is a space for increasing the shortest distance between the tip guides on both sides so that the wire W, twisted by the binding unit 7, does not get caught on the tip guide portion 99L when the twisted portion separates from the binding unit 7. More specifically, the recess 99Lc is a space for increasing the shortest distance between the tip guides on both sides so that the end of the wire does not get caught on the tip guide portion 99L and prevent it from being hindered from coming out, rather than the twisted portion. The recess 99Lc may also be provided in the tip guide portion (not shown) provided on the other side, and may be applied to all of the above-described embodiments. Furthermore, although the recess 99Lc is shown as an arc-shaped gap, the recess may be formed by increasing the distance between the abutting portions of the tip guides provided on both sides.

[0090] The arm portion 50 may be attached separately from the main body portion 10 or may be provided integrally with the main body portion 10. For example, the arm portion 50 may extend from the main body portion 10.

[0091] This application is based on a Japanese patent application (Patent Application No. 2024-018379) filed on February 9, 2024, the contents of which are incorporated herein by reference.

[0092] According to the present disclosure, it is possible to provide a binding machine that can firmly hold a curl forming portion.

[0093] DESCRIPTION OF SYMBOLS 1A to 1D... rebar binding machine, 10... main body, 2... magazine, 20... reel, 3... wire feeding section, 30... feed gear, 5... curl forming section, 50... arm section, 50a... hole section, 50g... guide surface forming section, 51... curl guide section, 51a... hole section, 51g... guide surface forming section, 6... cutting section, 7... binding section, 8... drive section, 80... torsion motor, 81... reducer, 9L, 9R... tip guide section (support member, regulating means), 9La, 9Ra... abutment section, 90L, 90R... arm support section (first supported section), 90La... hole section, 90Ra... screw hole section, 90s... screw (second support section, supporting means), 91L, 91R... curl guide support section (first supported section), 91La... hole section, 91R a...screw hole portion, 91s...screw (supporting means), 92L, 92R...main body support portion (second supported portion), 92La, 92Ra...hole portion, 92Ls, 92Rs...screw (first supporting portion), 93L, 93R...bending portion, 95...main body side arm support portion, 95a...screw (first supporting portion, supporting means), 96...main body side curl guide support portion, 96La, 96Ra...screw (first supporting portion, supporting means), 97L, 97R...main body side tip guide support portion, 97Rb...fastened portion, 98L...supporting member, 98a...arm support portion, 98b...curl guide support portion, 98c...connecting portion, 98s1, 98s2...screw, 98d...butting portion, 99La, 99Lb...abutting portion, 99L...tip guide portion, 99Lc...relief portion, W...wire

Claims

1. A bundling machine that wraps a wire around an object to be bound, comprising: a main body; an arm that is attached to the main body and curls the wire; and a curl guide that is attached to the main body and guides the wire that has been curled by the arm to a bundling section, and is equipped with a restricting means for restricting relative displacement between the arm and the curl guide.

2. The binding machine according to claim 1, wherein the restricting means is a member different from the main body, the arm, and the curl guide.

3. The binding machine according to claim 1, wherein the regulating means regulates relative displacement between the arm portion, the curl guide portion, and the main body portion.

4. A bundling machine for winding a wire around an object to be bound, comprising: a main body; an arm attached to the main body for curling the wire; and a curl guide attached to the main body, and a support member for supporting the main body and at least one of the arm and curl guide.

5. The binding machine according to claim 4, wherein the arm portion and the curl guide portion are each supported on the main body portion by the support member.

6. The binding machine according to claim 5, wherein the arm portion, the curl guide portion, and the main body portion are supported by the support member.

7. The binding machine according to claim 4, wherein the support member has a bent portion.

8. The binding machine according to claim 4, wherein the support member has an abutment portion that protrudes further toward the curl guide portion than the arm portion and / or further toward the arm portion than the curl guide portion.

9. A binding machine as described in claim 4, wherein the support member extends from a base end at a support point between the main body portion and the arm portion and / or the curl guide portion, and tapers from the base end toward a tip end in the extension direction of the arm portion and / or the curl guide portion.

10. The binding machine according to claim 4, wherein the support member extends from a base end at a support point between the main body and the arm and / or curl guide, and has a tip in the extension direction of the arm and / or curl guide from the base end, the base end being thicker than the tip.

11. The binding machine according to claim 4, wherein the support points between the support member and the arm portion and / or the curl guide portion are provided at locations different from the wire path.

12. The binding machine according to claim 4, wherein the support members are provided on both sides of the arm portion and / or the curl guide portion.

13. The binding machine according to claim 4, wherein the support member has an abutting portion against which the object to be bound is abutted.

14. The binding machine according to claim 4, wherein the support member has a clearance portion that prevents interference with the wound wire.

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