JPH047046Y2 - - Google Patents

Description

[Detailed description of the invention] (Technical field of the invention) The present invention is a binding consisting of a long binding band, an opening through which the band is inserted, and a stopper formed with a locking claw on the opposite wall surface of the opening. The present invention relates to a binding machine for binding electric wires and the like using a tool, and particularly relates to a band detection device that performs a binding operation by detecting the tip of a binding band wound around an object to be bound.

(Technical background of the invention and its problems) In this type of tying machine, when tying is performed using a tying tool in which the tying band and the stopper are configured separately, the tying band is first The tip of the band is inserted into the opening of the tool, and the tip of the band that protrudes forward is run in a loop around the object to be bound.The tip of the band is inserted into the opening of the stopper and is locked by the locking pawl. By pulling back the base end, the distal end of the band can be tightened to the object to be bound.

By the way, in the above-mentioned binding operation, the action of inserting the band tip into the opening of the stopper cannot be performed by the band feeding force from the base end of the band.
This is because the band itself is flexible and bends easily and cannot transmit enough force to the tip, and the band has already been inserted once into the opening of the stopper, so the insertion of the tip requires This is due to the fact that the band must be pushed up, and this force cannot be obtained by the above-mentioned delivery force. Therefore, the tip of the band comes into contact with the locking claw of the stopper and is stopped by the band feeding force alone, and the band cannot move forward any longer.

Therefore, in order to insert the tip of the band into the stopper, a movable part is provided in a part of the annular outer guide member that guides the band around in a loop, and the movable part moves the band from the open position. In order to make the band go around, it operates to the first guide position forming the band guide, and can further operate from that position to the second guide position, thereby applying force to the band tip that cannot be obtained by the above-mentioned feeding force. A configuration has been proposed in which the device is pushed into the stop by applying force.

In this two-step operation, for example, a timer means is used to set a predetermined time from the start of feeding of the band as the timing for turning the movable part toward the second guide position and starting the second-step operation. A possible method is to feed the band a predetermined amount and start the operation when the set time is reached.

However, in this method using timer means, if the set time is short, the force will be applied from the movable part before the tip of the band has reached the close position of the stopper, and the range of force applied will become large. There is a risk that the flexible band may become deflected, resulting in poor running operation. Therefore, it is necessary to set this setting time to a long time, but if this is done, the excess band portion fed out may bend, causing the same traveling malfunction as described above during the pushing operation in the next process. Furthermore, due to the long setting time, there is an unavoidable problem that the time required for each binding operation increases.

Also, when the second stage of the movable part is operated, a force is applied to the band, so during this operation, the tip of the band must not be guided securely toward the opening of the stopper. However, there were also problems such as contact with the locking pawl, which caused the device to become inoperable.

(Purpose of the invention) The present invention was developed in view of the above-mentioned circumstances, and its purpose is to detect when the tip of the band that has gone around the object to be tied has reached a position close to the stopper, and In addition to starting the second stage operation of the movable part of the second stage, it also reliably prevents the tip of the band from deflecting during the second stage operation, improving operational stability and streamlining the bundling work. An object of the present invention is to provide a band detection device for a binding machine for electric wires, etc., which can be used.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a stopper provided with an opening and a locking pawl formed on an opposing wall surface in the opening, and a stopper provided with a locking pawl formed on one side of the stopper. A binding machine that binds objects to be bound, such as electric wires, using a binding tool consisting of a long band formed with teeth that engage with a locking claw, and a band feeder that supplies the binding band through an opening in the stopper. a guide member, an annular outer guide member disposed around the object to be bound in order to guide the band around the object to be bound, and an annular outer guide member disposed close to the object to guide the band. an inner guide member that guides the tip of the band and guides the distal end of the band that has circulated toward the opening of the stopper; a first guide position that forms an annular band guide around the object to be bound; a movable part provided on the annular outer member operable from a first guiding position to a second guiding position for further advancing and pushing the distal end of the band into the opening of the stopper; , which is disposed between the inner guide member and the stopper, is biased by a spring toward a guide position facing into the traveling path of the band, and when the tip of the band reaches a position near the stopper. A band guide piece that engages with the tip of the band to guide it toward the opening of the stopper and is movable from the guide position against the spring bias by engaging with the tip. , sensor means actuated in response to the movement of the band guide piece to generate a sensor output signal for initiating movement of the movable portion of the annular outer guide member from the first guide position to the second guide position; This is a band detection device in a binding machine for electric wires, etc., characterized by the following.

(Function) In the configuration of the present invention described above, when the band guide piece disposed close to the stopper engages with the band tip, the band guide piece moves against the spring bias. is used for the detection operation of the sensor means. Since the second stage operation of the movable part is performed in accordance with the timing of this detection operation, the tip of the band is always in a position close to the stopper at the start of the second stage operation, ensuring reliable contact with the stopper. Pushing operation becomes possible. In addition, by elastically engaging the band guide piece with the tip of the band, it eliminates the deflection that tends to occur in a flexible band and more reliably guides the band toward the stopper, thus achieving the above purpose. fully achievable.

Embodiments of the present invention will be described below with reference to the drawings.

(Example) In the tying machine of this embodiment, FIGS. 1 and 2 show the main parts of the tying machine in its original position before the tying operation.

In FIG. 1, 1 is the main body of the binding machine, and 2 and 3 are fixed jaws and movable jaws provided at the ends thereof. Both jaws 2 and 3 have arc-shaped guide grooves 2a and 3a on opposing inner surfaces, respectively, which constitute annular outer guide members and guide the binding band 4 around. The lower fixed jaw 2 is integrally fixed to the main body 1 by bolting, and the upper movable jaw 3 is rotatably supported on a support shaft 5, and is an annular outer guide member that performs two-stage operation as described below. It constitutes the movable part of.

The movable jaw 3 is connected to an actuating air cylinder 7 serving as an actuating means through an operating link 6 linked thereto, and in its original state is held at the open position shown in the figure and surrounded by both jaws 2 and 3. It is in a state in which objects to be bound can be inserted into the binding section 8.

The operating cylinder 7 includes a piston rod 9 linked to the operating link 6, a cylindrical piston 10 to which the rod 9 is attached, a compression spring 11 housed in the piston 10, a slider 12 that receives one end of the spring 11, and the slider. 1
The cylinder 14 is provided with an abutting rod 13 extending into the piston 10 so as to be separably abutted against the piston 2. And in the original state,
The air chamber 14a on the left side is in an inoperative position where pressurized air is applied.

A slider member 15 constitutes a support means for positioning and supporting a block-shaped stopper 16, and is slidably mounted on a horizontal guide frame 17 fixed to the main body 1 constituting a band feed-out guide member. That is, a stopper support recess 18, a band cutting cutter insertion hole 19, and a guide passage 20 are formed in the front end portion 15a, and the guide passage 20 is connected to the guide passage 17a of the guide frame 17.
is connected to.

In the original position of the binding machine, the slider member 15 is placed in the illustrated reference position. In this state, the front end of the guide frame 17 is located near the front end 15a of the slider member 15 and extends to the vicinity of the stopper 16.

The binding band 4 includes a drive pulley 21 constituting a band drive means and a pinch roller 22 that rolls into contact with the drive pulley 21.
is supplied from outside the binding machine via the drive pulley 2.
A reversible drive motor 24 connected to the drive shaft 23 of 1
(FIG. 2), the band is selectively driven in the band feeding direction shown by the solid line arrow or the band tightening direction shown by the broken line arrow. That is, the driving pulley 21 and the like that constitute the band driving means also constitute a band tightening means that tightens the band 4 against the object to be bound.

In the original position, the band 4 is placed in a standby position A in which its tip 4a remains within the guide passage 17a of the guide frame 17.

A tension roller 25 and a swinging plate 26 having a guide passage 26a for guiding the band 4 are arranged between the guide frame 17 and the drive pulley 21. It is pivotably supported to be able to swing freely, and is normally held at the original position shown by a tension sprig (not shown). The bridging gap between the guide passage 26a and the guide passage 17a of the guide frame 17 is narrow, and the entrance side of the guide passage 17a is chamfered, so that the band 4 can be bridged smoothly between them. Ru. A tension sensor 29 detects the degree of tightening of the band 4. A drive slider 30 drives the slider member 15, and is connected to an air cylinder 31 at one end and guided by a guide roller 32 supported by the main body 1 and a guide groove 30a of a predetermined length engaged with the guide roller 32. In the figure, the drive slider 30 is just at the beginning of its stroke. The slider 30 is in operational connection with the slider member 15, as will be described later, and serves as actuating means for the member 15.

The front end 15a of the slider member 15 that supports the stopper 16 is normally at a reference position at a predetermined distance, for example, 20 mm, from the band delivery port 33 formed in the fixed jaw 2 as shown in the figure. An intermediate region M is left in between. As will be described later, a movement path is formed in this intermediate region M, through which the slider member 15 can slide when the band is tightened.

In the intermediate region M, the band guide arm 34 is positioned across the band travel path S indicated by the chain line, in other words, the movement path of the slider member 15 from one side (above), and the lever structure is connected from the other side (bottom). Band guide pieces 35 are arranged to face each other.
These guide the movement of the band 4 in the intermediate region M.

The band guide arm 34 is rotatably supported on the main body 1 by a support shaft 34a at its base end, and is constantly biased in one direction (band guide direction) by a coiled spring 34b. is held in the first position shown.

On the other hand, the band guide piece 35 also functions as a band detection lever that detects the tip of the band and operates the sensor means, as will be described later, and is normally held at the first position shown in the figure. There is.

When the band guide arm 34 and the band guide piece 35 are in the first position shown in the figure, the band 4 is guided to travel therebetween.

The band guide piece 35 is attached to a pivot shaft 37 on the main body 1.
, a sensor lever 3 forming a part of the sensor means
These band guide pieces 35
The sensor lever 38 is normally elastically held in the relative positional relationship shown in the figure by a coiled spring 39 and a stopper 40 that holds it.

The sensor lever 38 has a substantially L-shape, and one arm thereof opposes an air-operated band sensor 36 provided on the main body 1, and is shown spaced apart from the band sensor 36 in the open state in the figure.

The band guide piece 35 supports a cam roller 42 via a link 41 and is connected to a two-arm lever 43 rotatably supported on the main body 1. It is within the trajectory. The band guide piece 35 has a tension spring 41 suspended on the link 41.
A is constantly biased by the spring in one direction (band guide direction), and one end of the link 41 is in contact with the contact portion 2b on the fixed jaw 2, and the link 41 is moved to the first position against the spring bias. is maintained.

Note that 44 is a cutter for separating the stopper 16 from the following stopper, and is provided integrally with the band guide piece 35.

Reference numeral 45 designates an inner guide member having a triangular cross section, and is positioned such that the apex portion of the triangle enters the band delivery port 33, and a pair of guide surfaces 45a and 45b are formed vertically inclined at a predetermined angle from the inner guide member 45. ing. The triangular apex portion is slightly deviated downward with respect to the band running path S shown by the chain line, and reliably guides the tip 4a of the band entering the delivery port 33 toward the upper guide surface 45a. do. Both guide surfaces 45 of this inner guide member 45
a and 45b cooperate with the fixed jaw 2 forming the corresponding annular outer guide member to form a delivery passage and a return passage regulated to a predetermined width as shown in the figure, and by passing the band tip 4a through these, , actively guide the leading end 4a of the running band along the guide grooves 3a, 2a of both jaws 3, 2, and in particular,
The tip 4 of the band that has entered the delivery port 33
It forcibly bends the running direction of the band so that it does not go straight and contact the object to be bound, and also serves to actively direct the tip 4a of the band, which has been returned in a loop, toward the stopper 16. .

The inner guide member 45 moves from the guide position where it acts as described above to the band running path S as described later.
It is configured to be able to be retracted laterally from the guide position at least before the band tightening operation is completed.

In FIG. 2, one end 30b of the drive slider 30 has entered the cam groove 46 of the slider member 15 so as to be able to engage with it, and is engaged with the one end of the cam groove 46 as shown in the figure when the binding machine is in its original position. It matches. This driving slider 30 is connected to the stop feed lever 4 via a cam roller 47 attached thereto.
8, the lever 48 has cam edges 49a, 49b which cooperate with the cam roller 47. The lever 48 is pivotally supported by the main body 1, and is biased in the stopper feeding direction in the figure by a stopper feeding spring 50 whose spring pressure is adjustable. The free end of the lever 48 is provided with a support shaft 51, a camshaft 52 mounted thereon, and a spring hook 53.

Reference numeral 54 designates an interlocking plate that is rotatably supported by a support shaft 55 on the main body 1 and is integral with the inner guide member 45, and has a U-shaped cam groove 56 that engages with the cam roller 52. A stopper feed pawl 57 is pivotally supported on the support shaft 51 and is constantly biased by a coil spring 58 in the direction of engaging the stopper.

The stopper 16 is guided by a stopper loading frame 59 attached to the main body 1, and is fed into the band running path S in a lateral direction along the loading path 59a in a connected state. Slider member 15 in the reference position
At this time, the stopper supporting concave member 18 is connected to the loading path 59a.
It is consistent with Note that 60 is a spring-biased check claw that restricts the return of the stopper 16.

Reference numeral 61 denotes a lever for detecting passage of the tip of the band, which is pivotally supported by the main body 1 and is supported by a spring 62.
The free end enters the band running path S via the slider member 15 and the guide frame 17, and is interposed between the tip 4a of the band at the standby position A and the stopper 16. There is. In this state, the lever 61 is in contact with the sensor 63, thereby detecting that the band 4 is not passing through. Reference numeral 65 denotes a cutter for cutting the band, which is guided and supported by the slider member 15 and is movable laterally with respect to the band running path S.

Reference numeral 66 designates a cutter support lever whose base end is rotatably supported by the slider member 15. A cutter 65 is attached to the free end of the lever, and the cutter 65 is normally held in place by a stopper 68 against the bias of a coil spring 67. held in the working position. In addition, the cutter support lever 66
corresponds to the cutter operating lever 70 via a cam roller 69 attached thereto, and the lever 70
is pivotally supported by the main body 1 and connected to a cutter actuating air cylinder 71.

In FIGS. 3 and 4, the binding tool used here is partially enlarged, but as shown in FIG. 3, the band 4 has locking teeth along the longitudinal direction on one surface. 4b is formed into a loose shape, and ribs 4c having the same height as the teeth 4b are formed along both side edges.

As shown in FIG. 4, the stopper 16 is connected by a web 16a that is easily broken, and has an opening 72 formed in the center thereof, which serves as a band insertion hole, passing through the band in the running direction of the band. Locking pawls 16b are integrally formed to protrude from the upper and lower opposing wall surfaces that partition the . The band 4 and the stopper 16 are manufactured, for example, by integral molding of a synthetic resin using a molding method such as extrusion or injection molding.

Next, a series of binding operations by the binding machine will be explained with reference to FIGS. 5 to 11.

In FIG. 5, when objects W to be bound such as electric wires are placed in the binding position 8, first, for example, by actuation of a trigger lever (not shown), the actuating cylinder 7 releases pressurized air from the left air chamber 14a. The outflow moves it from the inactive position to the first active position.
That is, the piston 10 moves to the left under the bias of the spring 11, but the slider 12
It stays in the position where it touches 3. As a result, the movable jaw 3 constituting the movable part is rotated from the open position to the first guiding position shown in the figure via the operating link 6, and both the jaws 2 and 3 are guided in an annular manner around the object W to be bound. Position grooves 2a and 3a.

Next, the motor 24 is driven to rotate forward in the feeding direction,
The band 4 is advanced along the band travel path S from the standby position A via the drive pulley 21 and the like. The band 4 is inserted from the guide frame 17 into the opening 72 of the stopper 16 supported in the support recess 18 of the slider member 15, and in the intermediate region M, the band guide arm 34 and the band guide piece 35 are arranged vertically. The vehicle is guided in its travel, moves forward further, and enters the delivery port 33.

An inner guide member 45 is interposed in front of the delivery port 33 so as to be located just between the object W to be bound and the band. Therefore, the tip end 4a of the band is guided in the regulated band feeding path by the upper guide surface 45a of the inner guide member 45 in the guide position, and is guided around the object W to be bound along both the jaws 2 and 3. The inner guide member 45 rotates around and when its tip 4a returns to the delivery port 33 again.
It is guided in the band return path by the lower guide surface 45b of the band and reaches a nearby position just before exiting the delivery port 33 and entering the stop 16. Here, the band guide arm 34 and the band guide piece 35 are shown again.
The return of the band tip member 4a is detected by the band guide piece 35, which is guided by the band guide piece 35 and also serves as a band detection lever. That is, when engaged with the band tip 4a, the band guide piece 35
The first
The band guide arm 3 rotates slightly from the position of , and as a reaction, elastic force is applied to the band tip 4a.
4 to temporarily hold the band tip 4a in this position. Then, due to the rotation of the band guide piece 35, the sensor lever 38
5 and 6, and engages and closes the band sensor 36. This results in
A sensor output signal is generated, and at that timing, the driving of the motor 24 is stopped and the actuating cylinder 7 is further moved to the second actuating position shown in FIG. 6, as shown in the pneumatic actuating circuit described below.

That is, the pressurized air is transferred to the right air chamber 14b.
is attached to the slider 1 along with the piston 10.
2 also leaves Rod 13 and moves to the left. As a result, the movable jaw 3 further rotates from the first position to the second guide position (Fig. 6), and the tip end 4a of the band
It is pushed into the opening 72 of the stopper 16 and is locked and fixed there by the locking claw 16b of the stopper 16.

In the above operation, as shown in FIG. 7, when the band 4 moves forward along the arrow F, it passes through the center position XX which is equidistant from the upper and lower locking claws 16b of the stopper 16. , guide frame 1
7 to the vicinity of the stopper 16, both locking claws 16 protrude in the opposite direction to the forward direction F.
Interference with b can be avoided. Furthermore, in the intermediate region M that protrudes from the stopper 16 toward the inner guide member 45, the band guide arm 34 and the band guide piece 35 guide the band 4 as described above, so that the band does not move against the locking pawl 16b during forward travel. Interference between the teeth 4b is actively prevented and the band runs smoothly.

Furthermore, when the distal end portion 4a of the band returns along the arrow R to the vicinity of the stopper 16, in order to enter the opening 72 of the stopper 16 from this position, the proximal end portion of the band 4 that has already been inserted must be A forcing force is required to push the band upward, and this force is applied by rotating the movable jaw 3 to the pushing position, and as shown in FIG. 8, the base end of the band 4 is pushed in positively. Center position
-X, and is deviated upward from the tip 4a to securely engage with the corresponding locking pawl 16b. Then, the tip portion 4a no longer comes out of its locked position.

Note that the upper and lower wall portions 15b and 15c between the stopper support recess 18 and the cutter insertion hole 19 of the support body 15
The upper wall portion 15b, that is, the wall portion on the side from which the base end of the band is pushed up, is shortened by forming a notch 15d so that the base end can easily move upward.

From the state shown in Figure 8 above, point the proximal end of the band to arrow P.
By pulling back along the band 4, the tip 4
A remains in the stopper 16 and slides in the locked state, and the band is tightened.

That is, when moving to the operation of tightening the band 4 and tightening it against the object W to be bound, that is, before the band tightening operation is completed, the inner guide member 45 moves from the guide position in the band traveling path S to the position shown in FIG. Evacuate in the direction of the arrow as shown. This evacuation action is
This is done by moving the drive slider 30 from the starting end position of the stroke in the direction of the arrow until it engages with the other end of the cam groove 46 of the slider member 15.
During this time, the cam roller 47 engages with the flat cam edge 49b of the lever 48 to hold the lever 48 in the rotating position against the spring, and the lever 54 rotates due to the cooperation of the cam roller 52 and the cam groove 56. An avoidance operation of the inner guide member 45 is performed.

Next, the drive slider 30 further moves to the left, and the slider member 15 is moved from the reference position in the direction of the object W through the intermediate region M to the forward position shown in FIG. 10, and during this time, the motor 24 is driven in reverse. Then, the driving pulley 21 and the like are driven in the direction shown by the arrow, thereby operating to pull back the base end portion of the band 4. As a result, the band 4 is tightly tightened on the object W to be bound.

Note that, as a pre-movement before the slider member 15 moves forward, the movable jaw 3 moves to the open position.
To avoid interference with a loop-shaped band when the slider member 15 moves forward.

Further, as the drive slider 30 moves and engages with the cam roller 42, the band guide piece 35 rotates greatly via the link 41, and the slider member 15
The robot is forcibly moved to the second position shown in FIG. 10, which is outside the movement locus. Therefore, the member 35 does not hinder the forward movement of the slider member 15 and the stopper 16.

The band guide piece 35 rotates against the spring 39 relative to the sensor lever 38 until it reaches the second position. sensor 3
6 in the engaged position. Therefore, this configuration has the advantage that there is no need to specially provide a self-maintaining air circuit or the like.

On the other hand, when the slider member 15 moves forward, the upper band guide member 34 moves forward at its front end 15a.
The inclined cam edge 3 formed on the band guide member 34
4d, and its cam action causes the member 34 to spring 34 as the slider member 15 moves.
Smoothly rotate it out of the movement trajectory against the bias of b. The position shown in FIG. 10 is the second position of the upper band guide member 34.

In this way, both the band guide arm 34 and the band guide piece 35 are moved out of the trajectory of the slider member 15 in relation to each other when the slider member 15 moves forward, so there is no problem in the movement of the slider member 15.

Further, when the slider member 15 retreats and returns to the reference position, the upper band guide arm 34 is moved by the biasing force of the spring 34b according to the movement.
The lower band guide piece 35 is the drive slider 30
are each returned to the first position by a linkage mechanism interlocked with. Accordingly, the sensor lever 38 also returns the band sensor 3 to the state shown in FIG.
Move away from 6.

Prior to the forward movement of the slider member 15, the cutter 44 operates to cut the web 1 of the stopper 16.
6a (FIG. 4) and separated from the subsequent stopper of the stopper 16 supported by the slider member 15. The operating direction of the cutter 44 is indicated by arrow Q in FIG.
It is shown.

Note that instead of this cutter 44, it is also possible to configure the web to be cut off at the sliding edge portion with the main body when the slider member 15 moves forward, so that the cutter 44 can be made unnecessary.

When the tension of the pulled back band 4 increases and the tightening of the bound object W becomes sufficiently strong, the swing plate 26 is moved via the tension roller 25 against the bias of a tension spring (not shown). When the plate 26 rotates from its original position to a state where a predetermined tightening force is obtained, the leaf spring 2
The sensor 29 is operated via the cutter 8, thereby starting the cutting operation of the cutter 65.

That is, as shown in FIG. 11, the air cylinder 71 is actuated to rotate the cutter operating lever 70, and the cutter support lever 66 is cam operated to operate the cutter 65 from the inoperative position, and the cutter 65 is moved from the inoperative position to the position immediately adjacent to the stopper 16. At the rear position, band 4 is cut from the proximal end.

This cutting loosens the base end of the band, and the tension roller 25 returns to its original position due to the bias of a tension spring (not shown). With this force, the remaining base end of the band 4 is moved as shown by the chain line in FIG. Retreat to position B shown.

However, at this position B, the tip end 4a of the band
Since it is in a state of interfering with the entry of the next stopper 16, the motor 24 is further driven in the reverse direction to pull the tip end 4a of the band back to the initial standby position A.
Then, the return to position A is detected by the lever 61, and the motor 24 is stopped by the operation of the sensor 63.

Then, by releasing the trigger lever, the slider member 15 also retreats from the forward position to the reference position and separates from the binding device tied to the object W to be bound, and everything returns to its original position and one binding is completed. The operation is complete.

As a result, the stopper feed lever 48 is also returned to its original position by the action of the spring 50, and during this time, the feed claw 57
One stopper 16 is fed into the support recess 18 of the slider member 15 in preparation for the next binding operation.

Next, the pneumatic operation circuit diagrams of the binding machine shown in FIGS. 12a to 12h will be explained.

In each of the circuit diagrams in Fig. 12 a to h, the arrow → indicates the supply of pressurized air, the arrow 〓 indicates the flow direction of exhaust air, and the arrow indicates operation, and the arrow 〓 indicates stoppage under load. Each represents an operating state.

When not in use, the pneumatically actuated circuit is shown in Figure 12a.
is in a state of That is, the chuck 100 is open and disconnected from an external air pressure source 101, such as a compressor or an existing air piping system in a factory. Here, when starting the binding operation, first, when the chuck 100 is closed, the first
The state shown in the figure is reached, and the circuit becomes the air connection state shown in FIG. 12b.

That is, the guide operating valve 102 operates via the accumulator 103, and the guide operating cylinder 7
moves to the inoperative position and opens the movable jaw 3,
The slider actuation cylinder 31 and the cutter actuation cylinder 71 are each located at their original positions. At this time,
The band sensor 63 is maintained in a state in which it detects that the band 4 is at the standby position A and is not passing through.

As shown in FIG. 5, when the objects W to be bound, such as electric wires, are placed in the binding position 8, the trigger lever 104 is actuated by the operation of the trigger lever (not shown), and the circuit enters the state shown in FIG. 12c. .

That is, the guide operating cylinder 7 moves from the non-operating position to the first operating position due to the outflow of pressurized air from the left air chamber 14a. As a result, the movable jaw 3 rotates from the open position via the operating link 6 to the first guide position shown as the first stage of operation, and both jaws 2 and 3 form an annular shape around the object W to be bound. The guide grooves 2a and 3a are positioned at the positions of the guide grooves 2a and 3a.
Then, the guide operating valve 102 is activated and air is supplied to the air motor 24 to which the silencer 105 is connected.
is supplied to the forward rotation side. The motor 24 rotates forward in the feeding direction, and the band 4 moves forward from the standby position A along the band travel path S. Thereby, the band sensor 63 detects the passage of the band. The band 4 passes through the opening 72 of the stopper 16, enters the delivery port 33, and goes around the object W to be bound along both the jaws 2 and 3. Then, the tip portion 4a returns to the delivery port 33 again and reaches a position in the vicinity immediately before entering the stopper 16.

Here, the circuit is in the state shown in FIG. 12d, and the return of the band tip 4a is detected by the band sensor 36 via the band guide piece 35 and the sensor lever 38, as described above, and the sensor output signal is is sent. Then, in response to the detection signal, the band operating valve 106 operates, and the motor 2
4 stops, and the guide actuating cylinder 7 further moves to the second actuating position shown in FIG. This is done by supplying pressurized air to the sill 7 via the band actuation valve 106 and the return actuation valve 107.

As a result, the movable jaw 3 further rotates to the second guide position as a second stage operation, and pushes the tip end 4a of the band into the opening 72 of the stopper 16, where the engagement claw 16b of the stopper 16 Lock and secure.

Next, by tightening the proximal end of the band 4, the band is tightened, and the circuit enters the state shown in FIG. 12e.

In the inner guide member 45, the slider operating cylinder 31 is moved from its original position by the operation of the return operating valve 107, and the drive slider 30 engages with the other end of the cam groove 46 of the slider member 15 in the direction of the arrow from the starting end position of the stroke. By moving to this point, the vehicle evacuates from the travel path S.

Next, the cylinder 31 continues to operate to move the slider member 15 from the reference position in the direction of the objects W to be bound to the forward position shown in FIG. It is carried forward to the nearby binding position shown. During this time, pressurized air is supplied to the reverse side of the air motor 24 by the operation of the reverse operation valve 108, so that the air motor 24 is driven in the reverse direction to pull the base end side of the band 4.
As a result, the band 4 is tightly tightened on the object W to be bound.

Then, pressurized air is supplied to the guide actuation cylinder 7 via the return actuation valve 107 by the switching operation of the shuttle valve 109, the cylinder is moved to the inoperative position, and the movable jaw 3 is returned to the open position.

When the tension of the tightened band 4 increases and the plate 26 rotates until a predetermined tightening force is obtained, the sensor 29 is activated via the leaf spring 28.
operates, thereby starting the cutting operation of the cutter 65, and the circuit enters the state shown in FIG. 12f.

That is, the detection operation of the tension sensor 29 is transmitted to the cutter operating valve 110 via the switched shuttle valve 112, and the operating valve 11 is
0 is activated. And the cutter operation cylinder 71
moves from its original position and rotates the cutter operating lever 70 as shown in FIG.

As a result, the cutter support lever 66 is cam-operated to operate the cutter 65 from the inoperative position, and the band 4 is cut from the proximal end at a position immediately behind the stopper 16 in the binding position.

This cutting loosens the base end of the band and returns the tension roller 25 to its original position.

This is illustrated in the circuit of FIG. 12g, where the tension sensor 29 returns, which causes the cutter operating valve 110 to return. Then, the pressurized air is again supplied to the reverse rotation side of the air motor 24, and the cut end of the band 4 is pulled back further from the position B described later to the standby position A. As a result, the circuit state shown in FIG.
10, the cutter operating valve is switched to the operating side, the air supply to the motor 24 is stopped, and the bundling operation is completed.

Then, by releasing the trigger lever, the slider member 15 also retreats from the forward position to the reference position and separates from the binding device tied to the object W to be bound, and everything returns to its original position and one binding is completed. The operation is completed and the circuit returns to state 12b.

As described above, a series of binding operations including guiding and driving the binding tool are automatically performed without any manual operation. Therefore, the device can be incorporated into an automated machine in a factory or the like to easily configure an automated system for bundling.

(Effects of the Invention) As described above, according to the present invention, the band guide piece placed close to the stopper has the function of a guide means for guiding the band tip toward the opening of the stopper, and also has the function of being movable. Since the structure doubles as a band detection means for detecting the timing at which the second stage of operation occurs, the circuit structure is particularly complex compared to other methods such as fixed-rate feeding of bands using a timer. without the need for detailed configuration operations.
The tip of the band can be pushed into the stopper easily and reliably, and the band guide piece is configured to elastically engage with the tip of the band, which is a cause of poor running movement such as band deflection. This system actively prevents this and enables a highly reliable binding operation, which brings about various effects such as easier automation.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of the main parts of the binding machine of the embodiment in its original position before the binding operation, Fig. 2 is a planar cross-sectional view of the main parts taken along the line 2-2 in Fig. 1, and Fig. 3 4 are partially enlarged perspective views of the binding band and the stopper, FIGS. 5 and 6 are longitudinal cross-sectional views of essential parts showing the movable jaw in the first and second operating steps, respectively. 7 and 8 are enlarged sectional views of essential parts for explaining how the band is inserted into the stopper, FIG. 9 is a plan sectional view of essential parts showing how the inner guide member is retracted, and FIG. FIG. 11 is a longitudinal cross-sectional view of the main part showing the mode of binding operation, FIG. 11 is a plane cross-sectional view of the main part showing the mode of band cutting operation, and FIG. b is the state in which the air is not connected, b is the state in which the bundling operation is started by connecting the air, c is the state in which the cable band is fed, d is the state in which the band feed is completed, e is the state in which the band is tightened, f is the state in which the band is cut, and g is the band pulling back movement. The state h represents the state in which the binding operation is completed. 1... Binding machine body, 2... Fixed jaw, 3...
Movable jaw, 4... Binding band, 15... Slider member, 16... Stopper, 35... Band guide piece, 36... Band sensor, 37... Pivot shaft, 38... Sensor lever, W... Object to be bound.

Claims (1)

[Claims for Utility Model Registration] (1) An opening, a stopper provided with a locking pawl formed on an opposing wall surface within the opening, and a length having teeth formed on one side to engage with the locking pawl of the stopper. A binding machine that binds objects to be bound, such as electric wires, using a binding tool consisting of a long band, the device comprising: a band feeding guide member that supplies the binding band through an opening in a stopper; an annular outer guide member disposed around the object to be bound in order to guide the band around the object; and a distal end portion of the band which is arranged close to the object and guides the band toward the annular outer guide member and circulates around the object. an inner guide member that guides the material toward the opening of the stopper, and a first guide member that forms an annular band guide around the object to be bound.
provided on said annular outer member to be operable from a first guiding position to a second guiding position for further advancing the leading end of the band guided in said position and pushing it into the opening of the stopper; a movable part, which is disposed between the inner guide member and the stopper, is biased by a spring toward a guide position facing into the traveling path of the band, and has a distal end of the band attached to the stopper; When it reaches a position near the band, it engages with the tip of the band and guides it toward the opening of the stopper, and by engaging with the tip, it moves away from the guide position against the spring bias. a movable band guide piece; and a sensor output that is activated in response to the movement of the band guide piece to start moving the movable portion of the annular outer guide member from a first guide position to a second guide position. A band detection device for a binding machine for electric wires, etc., comprising a sensor means for generating a signal. (2) The band guide piece is rotatably supported on a pivot shaft provided on the binding machine body, and the sensor means is rotatably supported on the pivot shaft, and the sensor means is rotatably supported on the pivot shaft, and A band detecting device for a binding machine for electric wires, etc., as set forth in claim 1 of the utility model registration claim, comprising a sensor lever that is relatively rotatable and always held in a predetermined positional relationship by a spring bias. .