JP4669718B2 - Tightening fastener - Google Patents

Description

  The present invention relates to a binding and tightening as a manual mold used when a binding band made of a synthetic resin or the like used for binding a binding target such as an electric wire is tightened by a finger with a predetermined strength. It relates to ingredients.

  Conventionally, the binding tightening tool as described above, that is, a holding part for holding the head part of a binding band composed of a head part and a band part, and the band inserted through the head part held by the holding part. As a binding and tightening tool configured to include a tightening mechanism that can forcefully pull a portion and an operation unit for operating the tightening mechanism with an operation force of a finger, the one disclosed in Patent Document 1 is disclosed. Are known.

  In the technique disclosed in Patent Document 1, the tightening operation associated with the bundling through the band portion through the head portion is easily and reliably performed by efficiently transmitting the force of fingers with a tightening mechanism configured in the tool body. Therefore, there is an advantage that a strong and tightly bound state can be obtained without damaging the fingers. However, in binding using the binding tightening tool disclosed in Patent Document 1, there is a variation in binding strength depending on the binding location, such as excessive tightening at certain binding locations and insufficient tightening at certain binding locations. There was a problem that it was easy to come out.

  The tightening mechanism of the binding and tightening tool disclosed in Patent Document 1 has a structure in which a band portion is pulled by a predetermined amount when the operation lever (reinforcement lever) is gripped and operated, and how much is tightened? Is determined by the operator's senses. In other words, the tension of the band that is pulled by operating the operating lever once or multiple times is transmitted to the fingers through the operating lever, and the force required for the gripping operation gradually increases. The operator feels the increase in the level with his / her fingers and stops gripping. Therefore, as described above, the binding strength inevitably varies depending on the binding location.

In addition, if the operator performing tightening changes, the bundling pressure tends to be different accordingly, and the skilled worker can work with little variation in the bundling pressure, but the variation in bundling pressure is noticeable for unskilled workers. The binding pressure tends to change depending on the skill level of the work using the tightening tool and the operator, and there is still room for improvement in the tightening using the binding tightening tool. .
JP 2001-240017 A

  An object of the present invention is to provide a binding tightening tool configured to tighten a band portion wound around a binding target and passed through a head portion by a finger operation force so as to obtain a stable binding state. Regardless of whether or not the operator or his / her skill level is different, the binding pressure by tightening is provided as improved so that it is controlled to the set value at any binding location.

According to the first aspect of the present invention, in the binding and tightening tool, the holding portion 5 that holds the head portion 2 of the binding band V that includes the head portion 2 and the band portion 1, and the head that is held by the holding portion 5. A tightening mechanism a capable of forcibly pulling the band portion 1 inserted through the portion 2, and an operation portion b for operating the tightening mechanism a by an operating force of a finger,
When the tension force of the band portion 1 pulled by the operation of the tightening mechanism a reaches a set value, a bundling pressure limiting means e for restricting the band portion 1 from being pulled further is provided.
The operation part b is configured to have an operation lever 18 that can be swung freely.
The tightening mechanism a is provided with a rotating body 21 that can contact the band portion 1 and forcibly send out the band portion 1, and send out the rotating body 21 as the operating lever 18 swings in the gripping direction. And a one-way clutch Cr that operates so as not to transmit the rotational force to the rotating body 21 when the operation lever 18 swings in the grasp release direction. ,
The bundling pressure limiting means e interlocks the operation lever 18 and the one-way clutch Cr via an elastic mechanism 49 in a state where an initial stress is applied, and when the tension is not more than a set value, The operating force of the operating lever 18 with respect to the one-way clutch Cr becomes smaller than the initial stress, the elastic mechanism 49 is not displaced, and the transmission state in which the operating force is transmitted to the one-way clutch Cr is maintained. When the tension force exceeds a set value, the operation force of the operation lever 18 with respect to the one-way clutch Cr becomes larger than the initial stress, and the elastic mechanism 49 is displaced, so that the operation force is in the one-way direction. It is configured to switch to a transmission cut-off state that is not transmitted to the clutch Cr .

The invention according to claim 2 is the binding tightening tool according to claim 1, wherein the band portion 1 tightened by the tightening mechanism a is protruded from the head portion 2 toward the lower side in the tightening direction. 2 is provided with a cutting mechanism d that can be cut at a location near 2;
The operating portion b, the binding pressure limiting means e, and the cutting mechanism d are operated so that the cutting mechanism d is operated as the binding pressure limiting means e is operated and the operation portion b is continuously operated. Is provided with a linkage mechanism f that interlocks and.

The invention according to claim 3 is the binding tightening tool according to claim 1 or 2 , wherein the binding pressure limiting means e has a set value variable mechanism i for adjusting and maintaining the set value. It is what.

According to the first aspect of the present invention, as will be described in detail in the embodiment, when the tension force of the band portion 1 pulled by the operation of the tightening mechanism a reaches the set value by the newly provided binding pressure limiting means, As described above, the band portion 1 is regulated so as not to be pulled. Therefore, regardless of the skill level of the worker or individual differences, it is possible to perform a united bundling with a predetermined strength, regardless of the location of the bundling, or regardless of the worker or his / her skill level. Thus, it is possible to provide an improved binding and tightening tool such that the binding pressure due to is controlled to a set value at any binding location. In addition, there is an advantage that it is possible to eliminate useless operations such as holding the operation lever and continuing to operate it even though the binding pressure has reached the set value. Furthermore, the tightening mechanism and the bundling pressure limiting means are constructed using extremely general mechanisms such as an operating lever, a one-way clutch, and an elastic mechanism that are gripped and swung, and special mechanisms are used. Compared to the above, there is an advantage that it can be advantageous in terms of stabilization of operation and cost.

According to the second aspect of the present invention, not only is the bundling pressure maintained at the set value by the operation of the operating portion, but the band portion is cut at a position near the head portion when reaching the set value. That is, by a single operation that continues to operate the operation unit, the tightening function to the set bundling pressure and the cutting function of the band unit, which is the next process, are performed alone. As a result, it is possible to perform tightening and cutting of the band unit to the set bundling pressure regardless of the level of proficiency of the operator, even though it is a single action that operates the operation unit, and a more convenient and easy-to-use bundling tightening tool. Can be provided.

According to the invention of claim 3 , since the set bundling pressure can be adjusted and maintained, an optimum bundling state is obtained according to various conditions such as hard and soft bundling target, small bundling diameter, small or large bundling condition. There is an advantage that makes it possible.

Embodiments of a binding and tightening tool according to the present invention will be described below with reference to the drawings. 1 and 2 are general views of the binding and tightening tool, FIGS. 3 and 4 are exploded views showing the internal structure, FIGS. 5 and 6 are side views of the main parts showing the operation of the pushing mechanism, and FIG. 8-10 are side views showing the operation of the tightening mechanism and the binding pressure limiting means, FIG. 11 is an operation diagram showing the structure of the cutting mechanism, and FIGS. 12-14 show the binding tightening work. perspective view of a main portion, FIG. 15-17 showing the structure of a binding band, Fig. 18 and 19 show a retaining portion of the head portion FIG, 21 is an exploded perspective view showing the structure of a one-way clutch, FIG. 2 to 24 is a side view showing another use state of the binding and tightening tool.

[Example 1]
As shown in FIGS. 1 to 3, the binding and tightening tool A according to the present invention includes a tip holding portion 5 that holds the head portion 2 of the binding band V (see FIG. 15 and the like), and this tip holding portion (the holding portion One example) A tightening mechanism a that can be forcibly pulled by the operating force of a finger by means of a finger operation force, and an operating part b for operating the tightening mechanism a by fingers. A tool body 6 that supports the tip holding portion 5, the tightening mechanism a, and the operation portion b, and a band holder 14 that is externally supported on the base end side of the tool body 6, and the band portion 1 by the set length. An extrusion mechanism c for projecting from the holding portion 5 and a cutting mechanism d for cutting the tightened band portion 1 are included. Further, the binding and tightening tool A is equipped with a binding pressure limiting means e for setting the tightening force of the binding band V and a linkage mechanism f for operating the cutting mechanism d when the binding pressure due to tightening reaches a set value. .

  First, an outline of a binding operation using the binding and tightening tool A will be briefly described. First, the harness stand 11 (see FIG. 2) is attached to the binding and tightening tool A in a state in which the head portion 2 is held by the tip holding portion 5 and the band portion 1 protrudes from the head portion 2 by a set length. Then, in order to bind the wire harness W arranged on the upper side of the support substrate 10, the wire harness W to be bound is approached obliquely from above. Then, in the vicinity of the binding jig J, the protruding band part 1 is inserted into the head part 2 through the opposite side of the wire harness W and engaged with the head part 2 to engage the band part 1 at the planned binding harness part n. A loop shape is used (see FIG. 12).

  Next, the position of the binding tightening tool A is finely adjusted so that the projecting piece 8 protruding from the tip of the tool body 6 is positioned at the set position 9 of the binding jig J, and then the operating lever 18 is grasped to tighten the tightening position. The operation of swinging to H (see FIG. 9) is repeated one or more times, and the band portion 1 is tightened so that the binding expected harness portion n is bound at a predetermined binding pressure (see FIG. 13). When the predetermined bundling pressure is reached, the operation lever at the tightening position H or higher can be grasped, and by grasping to the cutting position S (see FIG. 10), the head unit 2 moves upward (bundling). Since the protruding band part 1 is cut by the cutting mechanism d (in the direction opposite to the target existence side), the binding and tightening tool A is then retracted (see FIG. 14).

  Then, the next head portion 2 is set on the tip holding portion 5 and the pushing mechanism c is operated, so that the band portion 1 having a set length protrudes from the head portion 2 held on the tip holding portion 5. (See FIG. 6), this is a series of (one cycle) bundling and tightening operations. The manual bundling operation using the bundling and tightening tool A is repeatedly performed at a number of locations on the wire harness W. Next, the structure of each part will be described.

  As shown in FIGS. 1 to 3 and the like, the tool body 6 formed of a synthetic resin material is composed of left and right halved bodies 6L and 6R, and the head portion 2 in the tip holding portion 5 is inserted. The direction (in the direction of arrow A in FIG. 1) of the recessed hole portion 56 (see FIGS. 18 and 19) for holding the head portion 2, that is, the band insertion hole 105 (see FIGS. 17) is deflected with respect to the longitudinal direction of the grip portion 6a gripped with fingers in the body main body 6A including the tightening mechanism a and the operation portion b of the tool body 6 (in the direction of arrow B in FIG. 1). Specifically, the body tip portion 6b including the tip holding portion 5 of the tool body 6 is bent with respect to the body main body 6A so as to be different by 90 degrees. In other words, with respect to the body main body 6A that linearly extends to the front end portion of the housing 30 in the push-out mechanism c, the body tip portion 6b ahead of the body main body 6A faces downward so as to have an appropriate angle (about 40 degrees in FIG. 1). The tip holding portion 5 is formed on the tip bottom wall portion 6c that is bent in the same direction as the orientation of the grip portion 6a in the longitudinal direction (substantially horizontal in FIG. 1).

  As shown in FIGS. 6, 7, 18, and 19, the tip holding portion 5 is made of a synthetic resin head holder 55, with the outer surface portion 55 a being flush with the tip bottom wall portion 6 c. It has a structure that is bolted inside. More precisely, the recessed hole portion 56 formed in the head holder 55 is formed so that the support portion 107 and / or the engaging piece 108 of the head portion 2 to be described later is fitted so as to be lightly press-fitted. I mean. On the upper side of the head holder 55, there is configured a structural portion 12 for inserting the band portion 1 and supporting a cutter blade 15 of a cutting mechanism d, which will be described later, so as to be slidable.

  As shown in FIGS. 1 to 3, at the base end portion of the body main body 6 </ b> A, a substantially cylindrical bag that rotatably supports a band bobbin 7 in which a long band portion 1 is wound around a reel member 13. A shaped band holder 14 is provided. The band holder 14 includes a base end half 14A that is pivotally connected to the base end of the tool body 6, and a tip half that is swingably opened and closed around the fulcrum P with respect to the base end half 14A. It has an outlet hole 14 </ b> C for discharging the band part 1 unwound from the reel member 13. Further, a metal projecting piece 8 is attached to the distal end vertical wall portion 6d of the body distal end portion 6b so as to project further toward the distal end side in the horizontal direction.

  As shown in FIGS. 3, 7, 11, etc., the body tip 6 b has a cutting mechanism d having a cutter blade 15 that slides and an L-shaped arm 16 that is swingable about an intermediate fulcrum Z. It is disposed immediately above the holding part 5. As shown in FIGS. 3, 4, and 7, a composite rotating body 17 that is rotatable around the main fulcrum X and an operation lever 18 that is capable of swinging the balance at the main fulcrum X are provided in the middle of the tool body 6. A swing arm 19 that is mounted and pivotable about a lower fulcrum Y provided on the lower base end side of the composite rotating body 17 is pivotally supported. Further, in the tool body 6, a guide passage 20 for guiding and guiding the band portion 1 sent from the band holder 14 through the inner portion of the base end portion 18 </ b> A of the operation lever 18 to the tip holding portion 5. Is formed.

  Here, the binding band V used in the binding and tightening tool A will be described. As shown in FIGS. 15 to 17, as shown in FIGS. 15 to 17, the pair of band portions 1 and 1 can be inserted and locked in a back-to-back state, The head portion 2 is composed of a band portion 1 which is an independent component. The head unit 2 includes a locking unit 3 that locks and maintains the band unit 1 and a clamp unit 4 that can be inserted into a steel plate panel 102 (an example of a support member) 102 that is a vehicle body part and can be locked and supported. It consists of and. Since the band portion 1 only needs to have a required length, an excessive band portion due to band cutting after binding and tightening does not occur as compared with a popular binding band in which the band portion 1 and the head portion 2 are integrally formed. The band part 1 has a good yield and can be reduced in cost.

  15 and 16 show a state in which the wire harness W is bound using the binding band V and is locked to the panel plate 102. That is, the wire harness W composed of a group of a plurality of electric wires r is locked and fixed to the head portion 2 in a state where the wire harness W is surrounded by the band portion 1 and tightened, and the binding band V with the wire harness W is connected to the head portion. It is structured to be locked and fixed to the panel plate 102 by two clamp portions 4.

  As shown in FIGS. 15 and 16, the band portion 1 is a trough portion 104 a that is recessedly formed on one of the front and back surfaces of a band member 104 made of a synthetic resin material having flexibility such as nylon and polypropylene. And the crest portions 104b are alternately and continuously formed, and the engaging portions 104K are continuously formed. As shown in FIG. 1, for example, the band portion 1 is unrolled from a band bobbin 7 formed by winding a long band portion 1 around a rotary reel 13 and cut into an appropriate length. And use.

  As shown in FIGS. 15 to 17, the head portion 2 is formed in a peripheral portion of an oval mounting hole 103 formed in the panel plate 102 with a band insertion hole 105 for inserting the band portion 1. A support portion 106 that covers the support portion 106 in a state where the support portion 106 is cantilevered on both sides of the lower end portion of the support column 107 and the support column 107 that protrudes from the support unit 106 and is inserted into the mounting hole 103. A pair of engagement pieces 108 and 108 that are extended toward the outside and formed with engagement step portions 109 that can be engaged with the peripheral portion 102a of the attachment hole 103 on the outer side of the upper end portion. It is made of a flexible synthetic resin material such as polypropylene. When the support column 107 is inserted into the mounting hole 103, the pair of engaging pieces 108 and 108 are elastically deformed inward by sliding contact with the inner peripheral surface 103n (or the corner edge) of the mounting hole 103. Thus, the engagement step portion 109 is engaged with the peripheral portion 102 a of the mounting hole of the panel plate 102, so that the panel plate 102 is sandwiched between the pair of engagement pieces 108 and 108 and the support portion 106. It is configured to be.

  The support portion 106 is formed in a shape like a bowl with an oval shape in plan view in accordance with the shape of the mounting hole 103, and is a thick central region 106 </ b> A continuous with the upper end portion of the support column portion 107. And a skirt portion 106B formed around it. And, in order to urge the peripheral portion 102a of the mounting hole 103 between the pair of left and right engaging pieces 108, 108 which are main parts constituting the clamp portion 4, the vertical direction (the insertion direction of the band insertion hole 105). The central region 106A of the support portion 106 in plan view is set to be a thick portion thicker than the surrounding portion.

  The support column 107 is a cylindrical portion through which a band insertion hole 105 having a substantially rectangular shape in plan view (bottom view) passes vertically, and the band insertion through which both end portions 104t and 104t of the band member 104 are inserted back to back. Inside the hole 105, a pair of second engagement pieces 111, 111 for engaging with the valley portions 104 a of the end portions 104 t, 104 t protrude downward and in a state of being opposed to each other in the front-rear direction. Has been supported. The second engaging piece 111 is integrally formed at the boundary between the upper thick column portion 107A and the lower thin column portion 107B so as to be continuous with the thick column portion 107A. A combined mountain portion 111a and an engagement valley portion 111b are formed.

  As shown in FIGS. 15 and 17, a pair of engaging pieces 108 are formed in a cantilever support state projecting obliquely upward from the left and right of the lower end portion of the column portion 107, and centering on the root portion 108a of the lower end portion. Engaging stepped portions 109 made up of first to third stepped portions 109A to 109C are formed on the outer side of the upper end portion. Each of the step portions 109 </ b> A to 109 </ b> C is composed of a corner-shaped portion having a vertical wall 109 t and a horizontal wall 109 y, and each vertical wall 109 t is a curved surface having an arcuate plan view shape that matches the shape of the mounting hole 103. Is formed.

  As shown in FIGS. 3, 4, 7 to 10, the tightening mechanism a is arranged on the tension gear 21 having a gear portion 21 a that engages with the locking portion 104 </ b> K of the band portion 1 on the outer periphery, and on both sides thereof. The composite rotating body 17 composed of a pair of ratchet gears 22, 22, etc., a bifurcated ratchet claw 23 having a claw portion 23 a that can be meshed with each of the ratchet gears 22, and the aforementioned swinging having a lower fulcrum Y The arm 19, a connecting link 24 that connects the distal end portion of the swing arm 19 and the base end portion of the ratchet claw 23, an operating link 25 whose front end portion is pivotally connected to the swing arm 19, and bundling pressure on the operating link 25 It has an operation lever 18 or the like that is linked via a restricting means e. Each of the swing arm 19, the connection link 24, and the operation link 25 is composed of a pair of left and right first to third plate links 19a, 24a, and 25a. The proximal end portion of the operating link 25 is pivotally connected to the elongated hole 18 a of the operation lever 18 via a connecting pin 26.

  The tightening mechanism a has a one-way clutch Cr. The one-way clutch Cr basically includes a ratchet pawl 23 and a ratchet gear 22. More specifically, the tooth portion 22A of the ratchet gear 22 includes an inclined surface 22a that is gently inclined in the direction of the arrow C (see FIG. 4) and a stop surface 22b that is substantially vertical in the direction of the arrow D (see FIG. 4). The claw portion 23a at the tip of the ratchet claw 23 is fitted into the trough portion 22B sandwiched between the inclined surface 22a and the stop surface 22b.

  The base end side portion 23A of the ratchet claw 23 is pivotally connected to a support arm 43 pivotally supported around the main fulcrum X, and the base end side portion 23A is centered on the main fulcrum X. It is supported so as to be movable on a radius. Further, as shown in FIG. 5, the ratchet gear 22 is provided as long as no external force is applied by a torsion spring 54 fitted to a stepped pivot pin 53 for pivotally connecting the swing arm 19 and the connection link 24. Is pivoted in the direction of arrow E (see FIG. 4) about the pivot axis p4 with the connecting link 24 as a center. Both ends of the torsion spring 54 are engaged with the third link plates 19a of the swing arm 19, and the center portion is hooked and engaged with a receiving pin 23b protruding from the base end portion 23A.

  Next, the operation of the one-way clutch Cr will be described. The operation lever 18 is swung in a direction in which the base end side 18A is raised, and the ratchet pawl is moved via the operation link 25, the swing arm 19, and the connection link 24. 23 moves toward the tip 18B side (the left side in FIG. 4), the claw 23a moves into the trough 22B of the ratchet gear 22 to move the tooth 22A (the stop surface 22b). ) And the ratchet gear 22 rotates and moves in the direction of the arrow c. That is, the clutch is engaged with the ratchet pawl 23 and the ratchet gear 22 moving together. When the operation lever 18 is moved downward and the ratchet claw 23 moves toward the band holder 14 side (the right side in FIG. 4), the claw portion 23a rides on the inclined surface 22a and slides. Thus, the ratchet pawl 23 is moved to the band holder 14 side, but the ratchet gear 22 does not rotate. That is, the clutch is disengaged in which only the ratchet pawl 23 is moved.

  With the above structure, if the operating lever 18 is swung upward, the operating link 25 pushes the ratchet pawl 23 via the swing arm 19 and the connecting link 24, and the pawl portion 23a is engaged with the ratchet gear 22. The tension gear 21 is pivotally moved in the direction of the arrow C, and the band portion 1 meshing with the gear portion 21a is pulled toward the front side, whereby the planned binding portion n in the wire harness W is tightened. The swinging range of the operation lever 18 related to the tightening operation for pulling the band portion 1 is the operation at the standby position T from the standby position T (see FIG. 1) where the operation lever 18 comes into contact with the stop end 6t of the tool body 6 and stops. When the lever 18 is gripped with fingers gripping the grip portion 6a, the left and right end portions of the connecting pin 26 penetrating the elongated hole 18a to pivotally connect the base end portion of the operating link 25 to the operating lever 18 are formed on the tool body 6. This is a position until it comes into contact with the bottom surface of the stopper member 27 made of a plate material screwed to the left and right inside, that is, until a tightening position H (see FIG. 9).

  As shown in FIGS. 1 and 3, the operation portion b is configured by disposing the operation lever 18 pivoted at the main fulcrum X in a state where the base end portion 18 </ b> A is positioned below the grip portion 6 a. . The operation lever 18 is configured to return itself to a standby position T where the bottom wall 29 of the base end portion 18A abuts against the stop end 6t of the tool body 6 by a return spring 28 that pulls on the distal end portion 18B. The tip 18B is a part that functions as a member for operating the cutting mechanism d using the pin roller 18b supported at the tip. A pair of left and right peep holes 18d for internal confirmation are formed at the base end portion 18A of the operation lever 18.

  As shown in FIGS. 1 to 6, the push-out mechanism c includes a housing 30 that is screwed to the outer surface of the tool body 6, a rack gear 31 that is accommodated in the housing 30, an operation gear 32 that is rotatable at the main fulcrum X, The lock release plate 33 fitted to the boss portion 32a of the operation gear 32, the composite rotator 17 linked to the operation gear 32 via a one-way clutch 34 (see FIG. 21), and the state in which the composite rotator 17 is housed. The one-way clutch 34 and the like. The housing 30 accommodates a rack gear 31 that is a long member so as to be slidable back and forth, and covers the operation gear 32 and the lock release plate 33. A housing 39 for sliding the rack gear 31 with fingers is externally provided. A long notch 30a for projecting is formed. Reference numeral 40 denotes a leaf spring that exerts a stopper function that restricts the unexpected movement of the rack gear 31 and also provides a light frictional resistance when the rack gear 31 is slid by a finger to provide a sense of moderation.

  As shown in FIG. 21, the one-way clutch 34 is rotatable at a main fulcrum X in the inner space 17S and the clutch pawl 35 pivotally supported by the first axis p1 in the inner space 17S of the composite rotator 17. A clutch gear 37 pivotally supported by a pair of circular cover plates 36, 36, and a torsion spring 38 that presses and urges the clutch pawl 35 toward the inner diameter side. Each cover plate 36 is screwed to the left and right of the composite rotating body 17 so as to be a lid that covers the internal space 17S. The operation gear 33 and the clutch gear 37 are interlocked and connected in an integrally rotated state by a key shaft 41 (see FIG. 4) fitted over both of them.

  Now, this pushing mechanism c has a function of pushing a set amount of the band portion 1 drawn below the tension gear 21 by grasping the knob 39 with a finger and sliding it to the tip side. The detailed operation status is as follows. That is, when gripping the knob 39 at the return position m (see FIG. 1) and starting to slide forward, first, an action stage that is integrally formed inside the rack gear 31 and has a tip-down approach curved surface 31a at the tip. The lock release plate 33 rides on the portion 31A and moves in the vertical direction with respect to the tool body 6. The tip 33a pushes up the receiving pin 23b projecting laterally at the tip of the ratchet claw 23, and the claw 23a. And the ratchet gear 22 are disengaged, and a state in which the composite rotating body 17 is rotatable in the direction of the arrow D is brought about (see FIG. 5).

  At substantially the same time as the ratchet pawl 23 is lifted and swung, the tooth portion 31b of the rack gear 31 and the tooth portion 32b of the operation gear 32 start to engage with each other, and the rotation of the composite rotating body 17 in the two arrow directions is started. The band part 1 engaged with the gear 21 is forcibly pushed out. Then, as shown in FIG. 6, the band portion 1 is pushed out and held by the tip holding portion 5 when the rack gear 31 is slid to the pushing position k where the knob 39 is located at the foremost end of the long notch 30 a. A state of projecting a set amount from the head portion 2 is obtained. Thereafter, the knob 39 at the push-out position k is slid forward to return the rack gear 31 to the return position m. During this return slide movement, the operation gear 32 and the clutch gear 37 are moved by the function of the one-way clutch 34. The composite rotating body 17 does not rotate back due to idling, so that the extruded band portion 1 is not pulled back.

  In this way, by installing the one-way clutch Cr in the tension gear 21 that is a component for the tightening mechanism a, the component for the extrusion mechanism c that rotates in the direction opposite to that during the operation of the tightening mechanism a. A rational and economical configuration that can also be used as a (rotating body for extrusion) is possible, and the engagement portion 104K of the band portion 1 and the tension gear 21 can always be engaged with each other. There is an advantage that there is no risk of damage to the locking portion 104K such that the peak portion 104b is crushed due to incompleteness. For example, in the structure disclosed in the above-mentioned Patent Document 1, the structure is such that when the lever is gripped, the band is engaged and pulled, and when the lever is released, the engagement with the band is also released. There is a possibility that the band part is pushed and pulled when switching between occlusion and detachment, and the locking part of the band part may be crushed, and the subsequent engagement with the head part may become unstable. On the other hand, in the bundling and tightening tool of the present invention employing the constantly meshing structure of the band portion 1 and the tension gear 21, such a fear does not occur, and a reliable engagement state between the band portion and the head portion is realized. Thus, the advantage that the good reliability of the binding band can be maintained is obtained.

  As shown in FIGS. 3, 7, 11, and 18, the cutting mechanism d is basically a cutter blade 15 that is supported slidably back and forth by a tip holding portion 5 formed of a synthetic resin material or the like, It is comprised from the L-shaped arm 16 which has the front-end | tip part 16a which carries out uneven | corrugated engagement with the cutter blade 15. As shown in FIG. The cutter blade 15 is made of a stainless steel plate formed with a tip blade portion 15a and an operation hole 15b for passing the tip portion 16a. The cutter blade 15 accommodates the recessed hole portion (head portion 2) of the tip holding portion 5. When the L-arm 16 is in the set position g, the cutter blade 15 is in the standby position. When the L-shaped arm 16 swings and moves to the operating position q, the cutter blade 15 moves forward, and the band portion 1 is cut at a position immediately before the head portion 2.

  The L-shaped arm 16 is a part formed in a bifurcated shape in which an intermediate portion including the fulcrum Z branches into the left and right arm portions 16A and 16B so as to straddle the rail guide 42 forming the guide passage 20. It is pivotally supported by fulcrum Z. The rail guide 42 is an independent part that is formed by a pair of left and right halves 42A and 42B and is screwed to the body tip 6b, and a curved partial guide path 42R that follows the guide passage 20 is formed inside. ing. The left and right arm portions 16A and 16B are configured to be swingable in the space between the inner surface of the tool body 6 and the rail guide 42.

  As shown in FIG. 18, the structure portion 12 for supporting the cutter blade 15 in a slidable manner has a length for receiving the insertion hole 57 a for inserting the band portion 1 and the distal end portion 16 a of the L-shaped arm 16. In order to avoid interference between the metal-made cutter holder 57 in which the hole 57b is formed, the sliding plate 58 placed on the head holder 55, and the tip portion 16a of the L-shaped arm 16, the head holder 55 is moved downward. It is composed of a relief groove 55N formed to be recessed. The head holder 55 and the cutter holder 57 are screwed to the body tip portion 6b from the side. In other words, the cutter blade 15 is slidably moved back and forth in a hollow trunk formed between the upper and lower sides of the sliding plate 58 and the cutter holder 57, and slides forward or backward as the L-shaped arm 16 swings. Moved.

  The sliding plate 58 is formed with an insertion hole 58a for inserting the band part and an operation hole 58b for passing the tip part 16a. The pair of guide pieces 58g, 58g with a pair of guide pieces 58g of the sliding plate 58 is formed to a size that allows only one band portion 1 to pass through, and is wound around the binding target to be the head portion 2. It is configured to function as a band stopper that receives the band portion tip 1t reinserted into the tool body and prevents it from proceeding further into the tool body 6. Accordingly, the band portion 1 re-inserted into the head portion 2 stops before reaching the cutter blade 15, and only one band portion 1 can be cut by the cutter blade 15.

  In the cutting mechanism d, as shown in FIG. 11, the pin / roller at the tip of the lever is moved by further swinging the operating lever 18 at the tightening position H and swinging it to the cutting position S (see FIG. 10). 18b pushes down the base end portion of the L-shaped arm 16, whereby the L-shaped arm 16 swings in the direction of the arrow (see FIG. 11), and the cutter blade 15 moves forward and moves. When the cutter blade 15 slides in the forward direction, the band portion 1 that comes out from the tip of the guide passage 20 and is supplied to the head holder 55 through the cutter holder 57 and the sliding plate 58 can be cut. Then, the operation of the cutting mechanism d is configured to be automatically performed when the set bundling pressure defined by the bundling pressure limiting means e described later is reached and the tightening of the band portion 1 is finished. Yes.

  When the binding pressure (tightening pressure) due to tightening of the band portion 1 reaches a set value, the binding pressure limiting means e further prevents the tightening mechanism a from further operating from the tightening position H of the operating lever 18. This is a mechanism that exhibits the function of allowing the upward swing (the function of cutting the band portion 1). As shown in FIGS. 3, 7 to 10, and FIG. 20, in the internal space of the base end portion 18A of the operation lever 18. It is configured. On the upper surface of the bottom wall 29 of the base end portion 18A having an upward U-shaped cross section, a slider 45 made of aluminum alloy and having a downward U-shaped cross section is bolted via a sliding plate 44 made of stainless steel. A tension adjuster 46 made of a sheet metal is arranged so as to be slidable back and forth so as to straddle the slider. The tension adjuster 46 includes a bolt 47, a double nut 48, and a coil spring (an example of an elastic mechanism) 49 that pass through the base end wall 46a and the folded wall 18c formed on the base end side of the base end portion 18A. Thus, the operation lever 18 is pressed and urged toward the front (rear) side, that is, toward the band holder 14 side.

  A triangular plate 51 is pivotally connected to the front end portion of the tension adjuster 46 by a third axis p3 facing left and right, and this triangular plate 51 is a second axis facing right and left that is located immediately above the third axis p3. It is pivotally supported by the base end portion 18A of the operation lever 18 at p2. On the upper side 51A of the triangular plate 51, there is formed a substantially semicircular recess 51a for inserting and pushing the roller 50 fitted on the connecting pin 26 of the operating link 25. Usually, the recess 51a is formed in the recess 51a. The roller 50 is maintained in a state where it is lowered. Due to the elasticity of the coil spring 49, the tension adjuster 46 is urged to return so that the base end wall 46a abuts against the folded wall 18c. Usually, the connecting pin 26 is positioned at the front end of the long hole 18a, and the roller 50 Is in a state of fitting into the recessed portion 51a (see FIGS. 7 and 8).

  That is, the bundling pressure limiting means e interlocks the operation lever 18 and the one-way clutch Cr via the coil spring 49 in the state where the initial stress is applied, and when the tension of the band portion 1 is equal to or less than a set value, The operating force with respect to the one-way clutch Cr of the operating lever 18 becomes smaller than the initial stress, the coil spring 49 is not displaced, the transmission state in which the operating force by the operating lever 18 is transmitted to the one-way clutch Cr is maintained, and When the tension force of the band portion 1 exceeds the set value, the operating force on the one-way clutch Cr of the operating lever 18 becomes larger than the initial stress and the coil spring 49 is displaced, and the operating force by the operating lever 18 is changed to the one-way clutch Cr. It is also configured to switch to a transmission cut-off state that is not transmitted to.

  The operation of the binding pressure limiting means e will be described. In the range where the bundling pressure is less than or equal to the set value, in the swinging operation of the operating lever 18 from the standby position T (see FIG. 1) to the tightening position H (see FIG. 9), a triangular plate that swings integrally with the operating lever 18. 51 pushes the operating link 25 via the roller 50 fitted in the recessed portion 51a, whereby the tightening mechanism a is operated and the band portion 1 is tightened. When the operating lever 18 swings back from the tightening position H to the standby position T, the one-way clutch Cr is in an inoperative state so that the composite rotating body 17 does not move, and the link portion including the swing arm 19 and the operating link 25 is provided. Moves back.

  When the bundling pressure (tightening pressure) reaches a set value by one or more ascending / descending operations of the operation lever 18, as an example, as shown in FIG. When the bundling pressure reaches the set value at the intermediate position between the tightening position H and the tightening position H, the reaction force that the operating link 25 pushes the triangular plate 51 downward about the second axis p2 via the roller 50 causes the coil spring 49 to be tensioned. By pressing the adjuster 46, the triangular plate 51 is lifted upward about the second axis p2 and the urging force to swing is overcome (until then, the urging force has prevailed over the reaction force).

  When the operating lever 18 is continuously swung up and down, the connecting pin 26 fitted in the long hole 18a cannot move downward, and as a result, the triangular plate 51 swings and moves downward about the second axis p2. Thus, the roller 50 is relatively removed from the recessed portion 51a, whereby the connecting pin 26 is in a state where it can freely move to the front end (the band holder 14 side) in the long hole 18a. Then, the composite rotating body 17 is rotated back in the direction of the arrow D (see FIG. 4) by the tension force of the band portion 1 which is strongly tightened, and thereby the long hole of the base end portion 18A of the connecting pin 26 is obtained. It moves backward to the foremost side in 18a.

  Along with the backward movement of the connecting pin 26 while the upper side 51A is in contact with the roller 50, both end portions of the connecting pin 26 and the stopper fitting 27 are not in contact with each other. It is possible to make the rocker ascending further than H. Therefore, as shown in FIG. 10, the operation lever 18 can be lifted and swung beyond the tightening position H by continuing the operation of gripping and tightening the operation lever 18 that is gripped together with the grip portion 6a. The pin roller 18b at the tip of 18 pushes down the base end portion of the L-shaped arm 16 to operate the cutting mechanism d, and the band portion 1 is cut. At this time, the coil spring 49 is in a slightly compressed state, whereby the proximal end wall 46a is in a positional relationship slightly away from the folded wall 18c. While the operating lever 18 is moved upward and swinging from the swinging operation position (for example, the position of FIG. 8) at which the binding pressure reaches the set value to the cutting position S, the operating link 25 is not pushed and the tightening mechanism a Is in a state in which it operates idly, and the band portion 1 is cut in a state where the set binding pressure is maintained.

  That is, the bundling pressure limiting means e is configured to automatically operate according to a change in the balance between the bundling pressure increased by the operation of the tightening mechanism a and the coil spring 49, so that the operator can grasp the grip portion 6a of the operating lever 18. Convenient that both the tightening operation to the set bundling pressure of the band portion 1 and the cutting operation of the band portion 1 can be carried out alone by performing the swinging operation by grasping in the state of co-grip with one or more times. It has become. The bundling pressure limiting means e is not limited to the structure of the first embodiment.

  Further, by operating the double nut 48 and changing the set length of the coil spring 49 to adjust the initial stress, the binding pressure can be arbitrarily increased or decreased, thereby binding pressure limiting means. e has a set value variable mechanism i for adjusting and maintaining the set value of the binding pressure. The set value variable mechanism i includes a bolt 47 and a double nut 48. The double nut 48 includes a guide nut 48A (see FIG. 20) with a guide function in which left and right end portions 48a are inserted into guide long holes 46b formed in the left and right side walls of the tension adjuster 46, and a general hexagon nut 48B. And is a main component for causing the binding pressure adjusting mechanism e to function.

  In short, the operation part b and the tightening mechanism a are transmitted to the tightening mechanism a by the long hole 18a of the operation lever 18, the operating link 25, the connecting pin 26, the triangular plate 51, and the like. Operation force transmission that can be switched between a transmission state that interlocks and a transmission disconnection state that disconnects the operation unit b from the tightening mechanism a so that the operation force applied to the operation unit b is not transmitted to the tightening mechanism a The mechanism h is configured. The bundling pressure limiting means e maintains the operating force transmission mechanism h in the transmission state until the tension force of the band portion 1 reaches the set value, and when the tension force of the band portion 1 reaches the set value. It can be defined that the transmission mechanism h is configured to be switched to the transmission disconnected state.

  By the way, in a state where the binding pressure reaches the set value and the operating lever 18 can be further swung up from the tightening position H, that is, in a state where the connecting pin 26 moves from the front end to the rear end of the long hole 18a of the lever base end portion 18A. The tension gear 21 (the composite rotating body 17) may be rotated in the direction of the arrow D (see FIG. 4) by the elastic reaction force of the band part 1 that is strongly tightened. There is. For example, in a binding tightening tool having a structure that is cut while continuing to tighten the band part, the band part 1 is in a state of being slightly stretched and stretched slightly in the state of the set binding pressure. The engagement between 104K (mountain portion 104b) and the second engagement piece 111 of the head portion 2 may be uncertain. Then, when the band portion 1 is cut at a position close to the head portion 2 in that state, the locking portion 104K that should be engaged with the second engagement piece 111 is not engaged, and the next locking portion. There is a possibility that 104K is engaged and the excessive band portion 1 is extremely reduced, or in some cases, the engagement is impossible.

  On the other hand, in the binding and tightening tool A according to the present invention, while the connecting pin 26 moves from the front end to the rear end of the long hole 18a of the lever base end portion 18A, that is, for a moment immediately before the band portion 1 is cut. Since the composite rotating body 17 can be freely rotated, the composite rotating body 17 is slightly rotated in the direction opposite to the tightening direction as described above to relieve excessive tension of the band portion 1. The band portion can be cut in a state where the locking portion 104K of the band portion 1 and the second engagement piece 111 of the head portion 2 are properly engaged while maintaining the set binding pressure. As a result, the band portion 1 can be cut without inconvenience at a position close to the head portion 2 while realizing a stable binding state with a set binding pressure in which the band portion 1 and the head portion 2 are firmly engaged properly. Can do it.

  Further, since the connecting pin 26 moves from the front end to the rear end of the long hole 18a when the bundling pressure reaches the set value, the fact that the bundling pressure has reached the set value can be visually confirmed by observing the movement of the connecting pin 26. It is possible. This action is particularly effective when, for example, there is no linkage mechanism f and the cutting mechanism d does not automatically operate when the bundling pressure reaches a set value (when there are other cutting operations). This is advantageous because it eliminates the waste of holding and operating the operating lever even when the binding pressure reaches the set value. In this case, a means for actively notifying that the binding pressure has reached the set value may be provided. For example, a sound source such as a bell that rings in contact with the connecting pin 26 that moves to the rear end of the long hole 18a, or a sensor that operates to detect when the connecting pin 26 comes to the rear end of the long hole 18a, A configuration is such that a sound source or light emitting means that operates according to detection information is provided.

  By the way, the band portion 1 guided from the reel support portion 13 through the base end portion 18A of the operation lever 18 to the inside of the tool body 6 passes through the groove portion 45a of the slider 45 covered with the sliding plate 44, and The guide member 52 is disposed inside the fulcrum Y portion of the swing arm 19 so as to straddle the lower portion of the tension gear 21. A path is formed so as to be passed through the guide passage 20 after being engaged with the lower portion of the tension gear 21. The slider 45 is formed with a protruding protruding tongue 45z for guiding the band part 1 coming out of the groove part 45a to the groove part 52a of the guide member 52. Further, the groove portion 52a formed in the upwardly bifurcated upper portion of the guide member 52 has a role of introducing the band portion 1 so that the engaging portion 104K is wound around the gear portion 21a of the tension gear 21. is doing.

  As shown in FIGS. 8 to 10, the linkage mechanism f depends on the positional relationship where the pin roller 18 b starts to contact the base end portion 16 b of the L-shaped arm 16, that is, the positional relationship between the operating lever 18 and the L-shaped arm 16. It is configured. Specifically, it is configured by setting the shapes and dimensions of the operation lever 18 and the L-shaped arm 16 so that the cutter blade 15 starts to move when the operation lever 18 is swung upward beyond the tightening position H. Yes. In other words, the linkage mechanism f has the operating portion b, the binding pressure limiting means e, and the cutting mechanism d so that the cutting mechanism d is operated as the binding pressure limiting means e is operated and the operating portion b is continuously operated. Can be defined as linked to each other.

  A bundling work procedure by the bundling and tightening tool A configured as described above will be described. First, as shown in FIGS. 1 and 9, in the state where the column portion 107 side portion of the head 2 is inserted and held in the recessed hole portion 56 of the tip holding portion 5, the knob 39 is grasped and slid forward. The band portion 1 having a set length is extruded from the head portion 2 (see FIG. 6). At this time, the knob 39 is immediately returned to the return position m from the pushing position k. Then, as shown in FIG. 12, the tip holding portion 5 is brought close to the harness portion n to be bound, and the protruding band portion 1 is wound around the binding scheduled harness portion n, and then the band tip The part 1t is reinserted into the band insertion hole 105 of the head part 2.

  Then, as shown in FIG. 13, the projecting piece 8 at the tip of the tool body 6 is positioned against the setting position 9 of the binding jig J, and then the operating lever 18 at the standby position T is tightened by grasping together. The operation of swinging up to H and pulling and tightening the band portion 1 existing inside the tool body 6 is repeated once or a plurality of times, and the binding expected harness portion n is tightened to a predetermined binding pressure. When the bundling pressure reaches a set value by the upward swing operation of the operation lever 18, further upward swing is possible from the tightening position H of the operation lever 18 as described above, and the band portion 1 is thereby cut. When the band part 1 is cut, as shown in FIG. 14, by lifting the entire binding and tightening tool A, the swinging stopper 60 of the binding jig J is pushed and retreats and swings without detouring. The binding and tightening tool A can be extracted from the binding jig J and moved. In this way, the work using one cycle of the binding and tightening tool is completed.

  The tool body 6 has the following advantages due to the shape in which the tip 6b is bent downward with respect to the body main body 6A. FIGS. 1 and 2 illustrate a case where the wire harness W, which is disposed on the side of the support substrate 10 mounted on the work table 91 via the harness stand 11, is bound at a number of locations. Specifically, this is a case where the harness part w2 arranged in the front and rear middle is bound by the binding band V. The binding and tightening tool A is supported by gripping its grip portion 6a with fingers, the distal end portion 6b is bent downward, the distal end holding portion 5 is separated downward with respect to the grip portion 6a, and the head portion 2 is removed. Since the direction of the recessed hole portion 56 for insertion and holding is set to face downward by 90 degrees with respect to the grip portion 6a, the body body 6A is separated upward without interfering with the harness portion on the front side. Thus, the binding and tightening operation can be performed in a posture in which the tool body 6 is substantially horizontal as a whole, in other words, in an easy posture that does not overwhelm the wrist or arm.

  In addition, the banding operation for tightening and cutting the band portion 1 in the binding and tightening tool A is performed by the operation lever 18 that is gripped by the fingers that hold the grip portion 6 a to support the tool body 6, so that only one arm is necessary. In addition, the operation lever 18 can be operated while holding the grip portion 6a for gripping the operation lever 18 once or a plurality of times, so it is troublesome or troublesome to use both hands or to change the grip position of fingers. There is an advantage that the operation is not required, and the operation is simple and convenient.

  In addition, the usage of the binding / tightening tool A can be as follows. As shown in FIG. 22, the tool body 6 is held in a vertical posture in which the body main body 6 </ b> A is directed vertically with the body distal end portion 6 b facing down, and the distal end holding portion 5 faces the front side (operator side). This is a way of binding (first usage). As shown in FIG. 22, this first alternative usage method is a case in which binding is performed with the clamp portion 4 facing sideways beyond the harness portion n to be bound, or a harness portion to be bound. This is effective in a situation where there are two separate harness portions near and above n, and the binding work can only be performed from the other side.

  As shown in FIG. 23, the tool body 6 is gripped in a vertical posture in which the body main body 6A is vertically oriented with the body tip portion 6b facing down and the tip holding portion 5 faces (on the side opposite to the worker). This is a way of bundling work (second usage). As shown in FIG. 23, the second alternative usage method is a case of binding with the clamp part 4 facing sideways on the near side of the binding target harness part n, or the vicinity of the side facing the binding target harness part n. This is effective in a situation where there are separate harness portions at two locations, and the upper portion, and the binding work can be performed only from the near side.

  As shown in FIG. 24, the body body 6A is in the sideways orientation and the tip holding portion 5 is in the sideways orientation in which the tool body 6 is gripped in the sideways orientation (third usage method). As shown in FIG. 24, the third alternative usage method is a case in which the binding portion harness part n is bound with the clamp part 4 facing downward, or the binding target harness part n side and This is effective in situations where there are separate harness portions in the vicinity of both the front side and the upper side, and binding work can only be performed from the lower side.

  That is, the displacement amount (reference symbol D in FIG. 24) relative to the body main body 6A due to the bending of the body front end portion 6b having the front end holding portion 5 is set to a relatively small eye dimension. Since the direction dimension is small, the binding tightening tool A is positioned from any of the front, rear, upper and lower directions (four directions) in the binding of the wire harness W arranged on the support substrate 10 as described above. Tightening and bundling work can be performed, and it is easy to use and improves versatility, and is versatile. In addition, the binding and tightening tool is not limited to the above-described four directions of use, and can be used in an obliquely upward or obliquely downward posture, and cannot be used in any angle of 360 degrees. It has the advantage that it can be used without any problems.

  Further, as the shape of the tool body 6, as in the case of the binding and tightening tool A according to the first embodiment, the shape of the side view is substantially L-shaped, and the direction of the recessed portion 56 is 45 degrees with respect to the grip portion 6a. The shape of the side view with an angle of more than 0 degree and less than 90 degrees, such as inclining, is more than 90 degrees so that the shape of the side view shows a substantially square shape or the shape of the side view shows a substantially J shape. Things are also possible. In short, the direction of the recessed portion 56 of the tip holding portion 5 may be different from the longitudinal direction of the grip portion 6a.

Side view of the binding tightener The perspective view which shows an example of the binding work state by a binding tightening tool Partially exploded perspective view showing the schematic internal structure of the binding and tightening tool Enlarged perspective view showing the structure of essential parts such as a tightening mechanism and an extrusion mechanism Side view of the main part showing the state immediately after the start of operation of the extrusion mechanism Side view of the main part showing the operation end state of the extrusion mechanism Partially exploded perspective view showing the internal structure of the tool body Action diagram of essential parts such as bundling pressure limiting means showing intermediate state of tightening operation Action diagram of essential parts such as binding pressure limiting means showing the end state of tightening operation Operational diagram showing the operating state of the cutting mechanism at the end of tightening The enlarged perspective view of the principal part which shows the structure of a cutting mechanism The perspective view which shows the state which wound the band part around the wire harness and passed through the head part The perspective view which shows the state by which the band part was tightened in the positioning state by a jig | tool. The perspective view which shows the state which cut | disconnected the band part and extracted the binding tightening tool from the jig | tool. The perspective view of the principal part which shows the mounting example of the wire harness using a binding band Sectional drawing of a binding band in the mounting state shown in FIG. (A) Front view and (b) Side view showing the shape of a single head part Exploded perspective view showing the structure of the tip holding part The perspective view which shows the recessed hole part and head part of a front-end | tip holding | maintenance part. Cross section of the operating lever base end Exploded perspective view of compound rotating body showing structure of one-way clutch Side view of the main part showing the first alternative usage of the binding and tightening tool Side view of the main part showing the second alternative usage of the binding and tightening tool Side view of essential parts showing third usage of binding and tightening tool

DESCRIPTION OF SYMBOLS 1 Band part 2 Head part 5 Holding part 18 Operation lever 21 Rotating body 49 Elastic mechanism A Bundling tightening tool Cr One-way clutch V Bundling band a Tightening mechanism b Operation part d Cutting mechanism e Bundling pressure limiting means f Linking mechanism h Operation force transmission Mechanism i Set value variable mechanism

Claims (3)

A holding part for holding the head part of a binding band composed of a head part and a band part, and a tightening mechanism for forcibly pulling the band part inserted into the head part held by the holding part; And having an operation part for operating this tightening mechanism by the operation force of fingers,
When the tension of the band part pulled by the operation of the tightening mechanism reaches a set value, a bundling pressure limiting means for restricting the band part from being pulled further is provided.
The operation unit is configured to have an operation lever that can be swung.
The tightening mechanism is provided with a rotating body that can contact the band portion and forcibly feed the band portion, and forcibly rotate the rotating body in the band feeding direction as the operating lever is swung in the gripping direction. And a one-way clutch that operates so as not to transmit the rotational force to the rotating body as the operating lever is swung in the release direction.
The binding pressure limiting means interlocks the operation lever and the one-way clutch via an elastic mechanism in a state where an initial stress is applied, and when the tension force is equal to or less than a set value, The operating force for the one-way clutch becomes smaller than the initial stress, the elastic mechanism is not displaced, the transmission state in which the operating force is transmitted to the one-way clutch is maintained, and the tension force is a set value. Is greater than the initial stress, the elastic mechanism is displaced, and the operation force is not transmitted to the one-way clutch. Bundling tightening tool configured to . Providing a cutting mechanism capable of cutting the band portion tightened by the tightening mechanism at a location near the head portion in a portion protruding from the head portion toward the lower side in the tightening direction;
A linkage that interlocks the operation unit, the bundling pressure limiting unit, and the cutting mechanism such that the cutting mechanism is operated as the binding pressure limiting unit is operated and the operation unit is continuously operated. The binding and tightening tool according to claim 1, which is equipped with a mechanism. The binding and tightening tool according to claim 1 or 2 , wherein the binding pressure limiting means includes a set value variable mechanism that adjusts and maintains the set value.

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