JPH0617128B2 - Binding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a binding machine for winding a tape delivered from a tape reel around a to-be-bound object by raising and lowering a binding arm. The present invention relates to a rotation control device for a binding machine, which improves the operation of the binding machine.

(Prior Art) A conventional binding machine as shown in FIG. 4 is used. A binding arm 3 is pivotally attached to a bracket 2 of a base 1 by a support shaft 4 so as to be able to move up and down. The tape T becomes a tape roll R and is fitted on the tape reel 5,
Is supported by the tape reel shaft 6 and rotates to feed out the tape T. Then, the tape T is guided by the guide roller 7,
The tape which is fed along the binding arm 3 and reaches the tape crimping / cutting mechanism 8 at the tip of the binding arm 3a, and when the binding arm 3 is tilted, the tape on the base 1 where the tape crimping / cutting section 8 faces. It reaches the holding unit 9. In the tape holding portion 9, the tip of the tape T is held by being held by the tape holding portion.

In order to wind the tape T around the object to be bound S, the object to be bound S is moved in the direction of the arrow A so that the tape crimping cutting portion 8 at the tip of the binding arm and the tape holding portion 9 on the base 1 are wound. The tape T stretched over is pressed to place the object S to be bound at the position S'on the mounting table 10. Then, the binding arm 3 is tilted and the object S'to be bound is wound by the tape T. At that time, the tape pressure-bonding cutting section 8 and the tape holding section 9 are pressure-bonded and are drawn by the imaginary line in FIG. The binding arm 3'is brought into the state. As a result, the tape T wound around the object to be bound S'is pressure-bonded, the winding end is adhered, and the binding is completed. The tape is bonded and bound, and at the same time, the part that is bonded is cut off,
The new tape tip made by cutting is the tape holding part 9
Held in. When the binding arm 3 rises, the tip of the tape T is held by the tape holding portion 9 and returns to the original state. In this way, the bundling operation is repeated.

When such a bundling operation is performed, the tape T is unrolled from the tape roll R fitted on the tape reel 5, but is reversely rewound to the tape roll while the bundling arm is tilting. Is performed and it is a rather complicated operation, so I will explain about it.

In FIG. 5 and FIG. 6, the tape reel 5 is axially attached by a tape reel shaft 6 to a bearing 6a fixed to a bracket 2 attached to the base 1. A tape reel gear 11 is fixed to the tape reel shaft 6. The tape reel 5 is rotatably attached to the tape reel shaft 6, but a nut 12 integrated with the tape reel shaft 6 is in contact with the tape reel 5 via a spring 13. The friction plate 14 is pressed. Therefore, the tape reel 5 is fixed to the tape reel shaft while being pressed by the friction plate 14.

On the other hand, a fan gear 15 is rotatably attached to the support shaft 4 of the binding arm 3, and a fan gear drive pin 16 is planted in the gear body of the fan gear 15. Further, since the sector gear 15 is driven by the sector gear drive pin 16, the hook 1
7 is a hook pin 18 planted near the support shaft of the binding arm 3
It is rotatably attached to the shaft. A spring 17b is interposed between the central portion 17a of the hook 17 and the support shaft 4, and the hook 17 is constantly urged in the clockwise direction to engage with the drive pin 16 of the sector gear 15. . Therefore, if the hook pin 18 rotates around the support shaft 4 due to the up and down movement of the binding arm 3, the hook 17 also rotates accordingly, and the fan-shaped gear 15
Of the fan gear drive pin 16 is pulled by the hook 17 and is rotated together with the binding arm 3.
On the other hand, the hook engagement release cam 19 centered on the support shaft 4
It is fixed to the bracket 2 with a screw 19a. The side surface 17c of the hook 17 contacts the profile surface 19b of the hook disengagement cam 19 while being biased clockwise by the spring 17b.

An intermediate shaft 2 is provided between the sector gear 15 and the tape reel shaft 6.
0, and the intermediate shaft 20 has a first boss 21 and a second boss 2.
2 is rotatably attached to the shaft. The first boss 21 is fixed with a driven gear 23 that constantly meshes with the fan gear 15 and rotates according to the rotation of the fan gear, and a support arm 24 that supports a ratchet pawl described below. A ratchet pawl 25 is rotatably attached to the tip of the support arm 24 by a pawl shaft 26, and the ratchet pawl 25 is attached by a pawl shaft spring 26a.
The ratchet pawl tip 25a is biased in a direction to press the ratchet wheel described below. In the second boss 22,
A ratchet wheel 27 that abuts the ratchet pawl 25,
A transmission gear 28 that is constantly meshed with the tape reel gear 11 is fixed. At the initial position (position in FIG. 5) of the ratchet pawl support arm 24, a ratchet pawl pressing pin 29 is planted in the bracket 2, and when the ratchet pawl comes into contact with this, the ratchet pawl is pressed. The tip 25a is disengaged from the ratchet wheel 27 so that the ratchet wheel can freely rotate.

When the binding arm 3 is tilted from the position shown in FIG. 5 to perform the binding operation, the hook pin 18 rotates around the support shaft 4 and moves obliquely upward. Accordingly, the hook 17 moves and pulls the fan gear drive pin 16, so that the fan gear 15 rotates about the support shaft 4. Therefore, the conventional gear 23 meshing with this rotates around the intermediate shaft 20, and the support arm 24 also rotates around the intermediate shaft 20 in the clockwise direction in the drawing.
The ratchet pawl 25 also rotates in the same manner, but the ratchet pawl 2
Since it is in the direction in which it meshes with the ratchet wheel 27 with which 5 abuts, the ratchet wheel 27 also rotates, and the transmission gear 28 also rotates. This enables the tape reel gear 1
1 rotates counterclockwise in the figure, the tape reel 5 rotates, and the tape T is rewound.

When the binding arm 3 is tilted and lowered to a position where the tape is crimped, the state as shown in FIG. 7 is obtained, and the ratchet pawl 25
Comes down. At that time, the side surface 17c of the hook 17 comes into contact with the profile surface 19b of the hook engagement releasing cam 19 and the hook 1
7 is pushed, the engagement with the fan gear drive pin 16 is released, and the fan gear 15 falls by its own weight. However, sector gear 1
The rear projection 15a of No. 5 comes into contact with the hook pin 18 planted in the binding arm 3, so that the fan gear 15 stops halfway. As a result, the driven gear 23, the ratchet pawl support arm 2
Although 4 also rotates, the ratchet pawl 25 and the ratchet wheel 27 do not engage because the rotation direction is opposite. Therefore, the transmission gear 28 and the tape reel gear 11 do not rotate and do not affect the tape reel 5. As a result, the binding arm 3 and the tape reel 5 are disengaged from each other, the tension of the tape T is loosened, the tape is cut after that state, and the new tape tip is held by the holding portion 9. And unity arm 3
And the hook pin 18 returns to its original position, and the rear projection 15a of the fan gear 15 and the hook pin 1 are returned to their original positions.
The contact of 8 is released, and the sector gear 15 returns to its original position. Therefore, the driven gear 23 and the ratchet pawl support arm 24 also return to their original positions.

(Problems to be Solved by the Invention) In the above-described operation of the binding machine, when the binding arm 3 is in the upright state, the feeding length of the tape T is longer than in the tilted state. Therefore, during the standing motion of the binding arm 3,
Although the tape T is fed out, the rising operation is often performed rapidly, so that the tape T is fed out rapidly. In this case, since the tape reel shaft 6 is free, the tape reel 5 is rapidly fed out, so
Also rotates rapidly. Therefore, even if the binding arm 3 finishes the standing motion and the tape need not be unwound, the tape reel 5 is rotated by the rotational inertia, the tape is unwound extra, and the unwound tape is wound in the opposite direction. In some cases, the next binding operation is hindered.

Therefore, depending on the binding machine, a friction plate 5a is provided between the tape reel 5 and the placket 2 standing upright from the base 1 so that the rotation of the tape reel 5 is always suppressed. . However, in this case, the brake is always applied to the rotation of the tape reel to prevent the rotation, and an extra force is required when the tape is rewound. Also, since the tape reel is constantly pressed by the friction plate 5a, the frictional force changes,
The present invention has been made in order to prevent such troubles, solve the problems, and perform a reliable bundling operation.

(Means for Solving the Problems) As a means for solving the above problems, the present invention provides a bracket provided on a base with a binding arm that can be moved up and down, and supports a tape reel. In the binding device configured to convert a tilting motion of the binding arm into a rotational force and transmit the rotational force to the tape reel via a driven gear provided between the reel and the base end portion of the binding arm. A ratchet pawl is attached to the tip of a ratchet pawl support arm attached to the shaft, and a tape reel shaft is driven by a ratchet wheel driven by the ratchet pawl, and a brake lever is provided that is pressed by the tip of the ratchet pawl support arm. A brake drum slidably contacting the brake lever is pivotally attached to the shaft of the tape reel, and more preferably, the ratchet pawl support arm. The ratchet pawl is mounted with a spring that applies a rotational force in a direction opposite to the direction in which the ratchet wheel is driven.

(Operation) With this configuration, the brake lever pressed by the tip of the ratchet pawl support arm comes into contact with the brake drum fixed to the tape reel shaft during the standing operation of the binding arm, and the tape reel shaft Braking force is applied to.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings. 1 to 3 are obtained by adding the device of the present invention to those of FIGS. 5 to 7 in the prior art, and the same members as those in FIGS. 5 to 7 are designated by the same reference numerals and have the same functions.

The fan gear 15 is rotated by the up-and-down movement of the binding arm 3, and the driven gear 23 meshing with the fan gear 15 is driven. The driven gear 23 is fixed to the first boss 21 fitted to the intermediate shaft 20.
The ratchet pawl support arm 24 is fixed to the boss 21, and the tip of the support arm 24 is attached to the pawl shaft 26.
A ratchet pawl 25 is attached. Further, the ratchet wheel 27 and the transmission gear 28 are fixed to the second boss 22 fitted to the intermediate shaft 20, and the ratchet wheel 27 is driven by the ratchet pawl 25. And the transmission gear 28
The rotation is transmitted from the tape reel gear 11 to the tape reel gear 11 to rotate the tape reel shaft 6, as in FIGS.

In addition to that, in FIGS. 1 to 3, the ratchet pawl support arm 24 has a ratchet pawl 25 and a ratchet wheel 27.
As shown in the drawing, a spring 30 that generates a rotational force that rotates the support arm 24 in the direction opposite to the direction in which the support arm 24 is driven is provided between the arm of the support arm 24 itself and the ratchet claw that is planted on the bracket fixed to the base. It is mounted between the pressing pin 29 and the device. A brake lever 31 is provided which is pressed by the tip of the support arm 24. However, in this case, the tip of the support arm is not the tip of the support arm 24 itself,
The ratchet pawl top portion 25b into which the pawl shaft 26 of the ratchet pawl 25 is fitted comes into contact with the brake lever 31. In addition, the brake lever 31 has its support pin 3
2 is attached to a small bracket 33 fixed to the bracket 2. When the brake lever 31 is pressed by the ratchet pawl top portion 25b of the support arm 24, the brake lever 31 contacts the brake drum 34 fixed to the tape reel shaft 6. The small bracket 33 includes a brake lever 31 and a ratchet claw top portion at the tip of the support shaft 24.
A receiving metal 33a for supporting the brake lever 31 when the contact with 25b is released is attached.

When the binding arm 3 first stands up, the mechanism relating to the drive of the tape reel shaft is in the same state as in FIG.
When is tilted, the state shown in FIG. 7 is obtained. At this time, the tape reel shaft is driven similarly. However, after the state shown in FIG. 7 is reached and the tape crimping and cutting mechanism 8 in FIG.
Comes into contact with the profile surface 19b of the hook engagement releasing cam 19 to push the hook 17, and the engagement with the fan-shaped gear drive pin 16 is released. Then, the fan gear 15 tends to drop by its own weight, but in this case, the ratchet pawl support arm 24 fixed to the first boss 21 axially attached to the intermediate shaft 20.
Is mounted with a spring 30 that tries to rotate counterclockwise in the figure. Therefore, the driven gear 23, which is integral with the support arm 24, tends to rotate counterclockwise, and accordingly, a force acts to rotate the sector gear 15 clockwise, that is, downward. Together, the fan gear 15 is moved downward. As in the case of the prior art, the sector gear 15 has the rear projection 15a with the hook pin 1
8 and the state shown in FIG. 3 is reached. This also causes the support arm 24 to rotate counterclockwise and the fan gear 15
Rotates to the position corresponding to the position where
As shown in the figure, the shape faces the right lateral direction. At this time, the ratchet pawl 25b at the tip of the support arm and the brake lever 31
And are not in contact with each other, and face each other with a slight gap maintained.

Consequently, the tape is cut and the new tape end is held in the tape holding portion 9, and the binding arm 3 starts the standing motion. As the binding arm 3 stands up, the tape T is moved to the tape reel 5
The tape reel 5 rotates in the clockwise direction in FIG. 3 as it is loosened. Along with that, the tape reel shaft 6, the tape reel gear 11, and the transmission gear 28 rotate, and the ratchet wheel 27 rotates. Since the rotation of the ratchet wheel 27 is the rotation in the direction of meshing with the ratchet pawl 25, the support arm 24 integrated with the ratchet pawl 25 also rotates. As a result, the ratchet pawl crest 25b at the tip of the support arm 24 contacts the brake lever 31 and pushes the brake lever 31 upward. Then, the brake lever 31 presses the brake drum 34 that is fixed to the tape reel shaft 6, and the tape reel shaft 6 is braked. Then, the tape T is gradually unraveled, and the supporting arm 24 is also rotated counterclockwise along with it, but the ratchet claw top portion at the tip of the supporting arm.
Since 25b presses the brake lever 31 and the brake lever 31 presses the brake drum 34, the support arm 24 cannot rotate before the point where the brake lever 31 contacts the brake drum 34. It seems that the operation is inconsistent. However, the rotation of the support arm 24 is stopped, so that the ratchet wheel 27 and the transmission gear 2
8. Even if the tape reel shaft gear 11 and the tape reel shaft 6 are stopped, the tape reel shaft 6 and the tape reel 5 are connected by the friction plate 14 pressed by the spring 13, so that a slip occurs. The tape reel 5 rotates. In this way, the tape reel shaft 6 is stopped by the brake drum 34 being braked, but only the tape reel 5 rotates and the tape T is unraveled.

When the bundling arm 3 further rises, the hook pin 18 planted in the bundling arm 3 rotates clockwise and comes into contact with the upper side surface 15b of the fan-shaped gear 15.
When reaches the standing position, the hook pin 18 presses the upper side surface 15b of the sector gear 15, and the sector gear 15 is returned to the initial position. Then, the driven gear 23 that is always meshed is rotated, and the support arm 24 is also rotated. The ratchet pawl 25b at the tip of the support arm 24 presses the brake lever 31 so that the support arm 24 cannot rotate from a certain position, but the hook pin 18 implanted in the binding arm 3 causes the support arm 24 to rotate. The fan gear 15 is pressed with a strong force, and the support arm 24 is rotated accordingly. Therefore, the ratchet pawl top portion 25b at the tip of the support arm presses the brake lever 31 with a strong force to distort the brake lever 31 and rotate it further. It moves and reaches a position where it abuts on the stopper pin 29. In this state, even if the ratchet pawl crest 25b is in contact with the brake lever 31, the brake lever 31 does not contact the brake drum 34.
Therefore, at that time, the tape reel shaft 6 is not braked, and the ratchet pawl 25 contacts the stopper pin 29, and the engagement between the ratchet pawl tip 25a and the ratchet wheel 27 is released. , The tape reel shaft 6 is completely free and returns to the initial state.

(Advantages of the Invention) Since the present invention has the above-described configuration and operation, the tape reel shaft can be braked while the binding arm of the binding machine is standing up. Therefore, the tape reel is prevented from unnecessarily rotating and causing trouble. Further, since it is not necessary to constantly apply the braking force to the tape reel, the rotation resistance of the tape reel does not increase the rotation resistance at the time of winding the tape, and it is not necessary to adjust the braking force. Moreover, it is a feature of the present invention that such an effect can be achieved by adding simple parts.

[Brief description of drawings]

FIG. 1 is a side view of the main part of the binding machine according to the embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II thereof, and FIG. 3 is a side view similar to FIG. Showing the fourth
Figure is a side view of the entire conventional binding machine, Figure 5 is a side view of the main part, Figure 6 is a sectional view taken along line VI VI, and Figure 7 is the same as Figure 5 when the binding arm is tilted. FIG. 3 ... Binding arm 6 ... Tape reel shaft 20 ... Intermediate shaft 24 ... Ratchet pawl support arm 25 ... Ratchet pawl 27 ... Ratchet wheel 30 ... Spring 31 ... Brake lever 34 ... Brake drum

Claims (2)

[Claims] 1. A bracket provided on a base is provided with a binding arm so as to be able to move up and down, a tape reel is supported, and a driven gear provided between the tape reel and the base end of the binding arm. In a binding device configured to convert a tilting motion of the binding arm into a rotational force and transmit the same to a tape reel, a ratchet pawl is attached to a tip of a ratchet pawl support arm axially attached to the driven shaft, and the ratchet pawl is attached. A tape reel shaft driven by a ratchet wheel driven by a pawl is provided with a brake lever pressed by the tip of the ratchet pawl support arm, and a brake drum slidingly contacting the brake lever is axially attached to the tape reel shaft. A binding device characterized by: 2. The binding device according to claim 1, further comprising a spring that applies a rotational force to the ratchet support arm in a direction opposite to the direction in which the ratchet pawl drives the ratchet wheel.