JPS621885B2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field of the Invention> The present invention involves winding a continuous tape around a group of articles while forming a loop, and then wrapping the tip and middle portions of the overlapped tapes at the point where the loop is closed. Glue the
The present invention relates to a binding machine for binding a group of articles, and more particularly to a tape tightening mechanism that freely unwinds the tape when pressing the group of articles against the tape and performs a tightening operation after forming a loop with the tape around the group of articles.

<Conventional technology> Conventionally, this type of device was developed using the
A binding machine for binding vegetable groups using a continuous tape such as a single-sided adhesive tape or a non-adhesive tape is known. According to the tape tightening mechanism built into this binding machine, when the binding arm 71 is brought down to a certain degree in the process of lowering the upright binding arm 71, the friction clutch 72 is engaged and the tape wheel 73 is moved in the tape rewinding direction. When the rewound tape 74 reaches a certain tension, a slip occurs in the friction clutch.

<Problems with the conventional technology> This binding method in which the tightening force is set constant using the slip of the friction clutch 72 is bulky;
In addition, there is a drawback that the binding becomes uncertain when binding materials having high resistance during the process of reducing the diameter of the loop using the tape.

<Technical Problem of the Present Invention> An object of the present invention is to provide a tape tightening mechanism for a binding machine that can stably obtain a particularly strong tightening force.

<Technical means of the present invention> In order to achieve the above object, the present invention includes a base, a base rotatably supported on one end side of the base,
and a tape wheel for unwinding the tape;
A lock member for locking the tape wheel in a non-rotatable manner, a base-side tape adhesive mechanism provided on the other end of the base, and a pivot that can be raised and lowered with respect to the base at a position close to the tape wheel. a supported binding arm, pivoting integrally with the binding arm, and
An operating member for locking or releasing the locking member with respect to the tape wheel, and a tape loop disposed on the binding arm and working together with the base side tape adhesion mechanism to converge the group of articles. It consists of a tape adhesion mechanism on the binding arm side that adheres the tape for closing, and a tape guide provided at a position where the tape unwinding length when the binding arm is laid down is greater than the tape unwinding length when it is upright. The tape wheel is locked so as not to rotate by a locking member when the tape is tightened.

<Action of the present invention> The present invention has the above-mentioned means to stop the rotation of the tape wheel within a certain range of handle operation, and to keep the tip of the pick plate and the tip of the pinion tooth constantly engaged.

Further, after the clutch plate is activated, it is fixed by the clutch plate spring, and the support plate is provided at a position where the tape can be tightened by the action of the handle, so that a strong tightening force can be obtained.

<Embodiments of the present invention> Hereinafter, preferred embodiments of the present invention will be described in detail based on FIGS. 1 to 5. FIG. 1 shows a binding machine 2 that uses a single-sided adhesive tape 1 coated with an adhesive on one side of the tape as a binding tape. (located on the left end side of the base 3 in the figure), and sets the timing of unwinding of the single-sided adhesive tape 1 from the tape supply mechanism 4 and tightening of the single-sided adhesive tape 1 with respect to the tape supply mechanism 4. The tightening timing mechanism 5 is connected to the tape supply mechanism 4.
, and has a base-side tape adhesion mechanism 6A on the rear end side of the base 3 (the right end side of the base 3 in FIG. 1). Between the tape tightening timing mechanism 5 and the base-side tape adhesion mechanism 6A, a binding arm 7 that can be lowered and raised by an operator is pivotally supported on a support plate 8.

A fixed arm 9 for a tape guide is arranged in line with a support plate 8 that constitutes a part of the tape tightening timing mechanism 5.
is installed on the base 3. A tape guide pin 9a is provided at the upper end of the tape guide fixed arm 9. The position of this tape guide pin 9a is determined by the tape running path formed while the single-sided adhesive tape 1 unwound from the tape supply mechanism 4 passes through the tape guide pin 9a and the binding arm 7 and reaches the base side tape bonding mechanism 6A. The length is set to be longer when the binding arm 7 is laid down than when it is erected. As a result, the length of the actually unwound single-sided adhesive tape 1 when the binding arm 7 is laid down is shorter than when it is upright compared to the length of the tape running path.

At the lower position of the binding arm 7, a tape crimping stand 10, which constitutes a part of the base-side tape adhesion mechanism 6A, is supported so as to protrude to the front of the base 3 (to the left in FIG. 1). An article receiving stand 11 is provided.

The binding arm 7 is composed of two arm side plates 7a and 7b whose lower sides are curved concavely, and tape guide pins 12 are disposed at the tip portions of these arm side plates 7a and 7b. A return tension spring 14 is disposed between the tape guide pin 12 and a spring hook 13 provided at the lower end of the support plate 8. This return tension spring 14 is for raising the binding arm 7. The binding arm 7 is pivotally supported on the support plate 8 by a pivot 8a.

A binding arm side tape adhesion mechanism 6B is provided on the rear end side of the binding arm 7. When the binding arm 7 is fully erected, the binding arm side tape adhesion mechanism 6B and the base side tape adhesion mechanism 6
A single-sided adhesive tape 1 is stretched in a straight line between A and A.

As shown in detail in FIGS. 2 and 3, the tape supply mechanism 4 is provided with a wheel support 1 erected on the base 3 at a position forward of the support plate 8.
5. The tape wheel 16 is rotatably supported by the wheel support base 15, and the wheel gear 18 is rigidly connected to the tape wheel 16 via a wheel shaft 17. Above tape wheel 1
A wrapping tape 16b wound in a circular shape is attached to the wheel 6 via a wheel adapter 16a.

Since the tape wheel 16 is integrated with the wheel gear 18, when the wheel gear 18 engages with the hook plate 19 as a locking member and is prevented from rotating, the tape wheel 16 comes to a stopped rotation state. When released, it will be in a freely rotating state under the tension of the single-sided adhesive tape 1.

The tape supply mechanism 4 is driven by a tape tightening timing mechanism 5. This tape tightening timing mechanism 5 includes a fan-shaped timing operation base plate 21 fixed to a binding arm 7 by a rectangular bracket 20 and a tape wheel rotation prevention mechanism 2.
It has 2.

A hook release operation plate 23 is fixed to the lower end of the timing operation base plate 21 and protrudes downward toward the tape wheel rotation prevention mechanism 22.

A timing operating pawl 24, which has an approximately L-shaped side surface and serves as an operating member of the hook plate 19, is arranged on a radius that approximately bisects the arc of the timing operating base plate 21 so as to be pivotable by a pin 25. A stopping screw 26 is screwed into the timing operation base plate 21 at a position behind the pin 25, and the stopping screw 26 and the timing operation claw 24 are screwed together.
A torsion coil spring 27 is disposed between the one end 24a and one end 24a. The timing operation pawl 24 is always urged counterclockwise in FIG. 2 by this torsion coil spring 27. The other end 24b of the timing operation pawl 24 abuts the stopping screw 26 from below, so that the timing operation pawl 24 remains stationary at a fixed position when not in operation.

The tape wheel rotation prevention mechanism 22 includes a hook plate 19, a hook shaft 28 that rotatably supports the hook plate 19, and a tape wheel 16.
A timing plate 29, a hook plate 19, and a timing plate 29 for setting the rotation lock timing of the
The torsion coil spring 30 and the timing plate 29 disposed between the hook shaft 28 and the hook shaft 28 prevent the fixed plywood 31 and the timing plate 29 from rotating beyond a certain limit, which engage or disengage during rotation. It has a stopping leaf spring 32.

As shown in Figure 2, a square fixed plywood board 3
1 is fixed to a wheel support stand 15, and this fixed hook plywood 31 has three fan-shaped hook holes 3 at regular intervals on the circumference centered on the hook shaft 28.
3 is formed.

Both the hook plate 19 and the timing plate 29 are rotatably attached to the hook shaft 28. One end 30a of a torsion coil spring 30 disposed between the hook plate 19 and the timing plate 29
is hooked to the back surface 19a of the hook plate 19 (the right end surface side of the hook plate 19 in FIG. 29).

The timing plate 29 is attached to the hook shaft 28 adjacent to the fixed plywood 31, and
As shown in FIG. 3, the compression coil spring portion 30c of the torsion coil spring 30 disposed between the hook plate 19 and the timing plate 29 causes the hook shaft 28 to be located farthest from the assembly position of the timing plate 29. It is attached to the tip of the Hook shaft 28
A flat washer 33a is fixed to the tip of the hook plate 19 with a bolt 34a, and this flat washer 33aa serves to prevent the hook plate 19 from coming off.

on the front side of the hook plate 19, and
A retaining plate 34 is formed at the lower end portion and comes into contact with the front face portion 29b of the timing plate 29.

The torsion coil spring 30 biases the hook plate 19 against the timing plate 29 in a counterclockwise direction in FIG.

A fixed plywood board 31 is attached to the back side of the timing board 29.
Three protrusions 35 are formed corresponding to the three engaging holes 33 (see FIG. 4). Due to the fitting relationship between the protrusion 35 and the engagement hole 33, the rotating timing plate 29 stops at a fixed position.

An engaging pawl 36 is provided on the upper end side of the timing plate 29 to protrude toward the tape tightening mechanism 5.
At the lower end side 36a of this engaging claw 36, the timing operating claw 24 engages with the engaging claw 36 while rising clockwise in FIG. 2 from below the position shown in FIG. Rotate the quantity timing plate 29 counterclockwise. Engagement claw 36
is formed to protrude in a trapezoidal shape with respect to the timing plate 29, and when the timing operation pawl 24 descends from the position shown in FIG. 2 in the counterclockwise direction in FIG. Thereby, after rotating the timing plate 29 clockwise, it avoids the engaging pawl 36 while contacting the pawl outer peripheral portion 36b corresponding to the upper side of the trapezoid of the trapezoidal engaging pawl 36.

The engaging pawl 36 is located on the upper end side of the timing plate 29.
A positioning groove 37 is formed in a portion close to the. A stopping plate spring 32 having a substantially U-shaped cross section that cooperates with the positioning groove 37 is attached to the wheel support base 1.
It is arranged at the upper end of 5.

The timing plate 29 has a hook release receiving arm 39 that projects downward, and a roller 40 is pivotally supported at the tip of the hook release receiving arm 39 (the lower end of the hook release receiving arm 39 in FIG. 2). . A simple pin may be used instead of the roller 40. This roller 40 is a driven cam of the hook release operation plate 23.

A hook beak 41 is formed at the upper end of the hook plate 19, which is integrally assembled to the timing plate 29 by a torsion coil spring 30 and a retaining plate 34. By inserting this hook beak 41 between the teeth of the wheel gear 18, the wheel gear 18 is locked so that it does not rotate. Even when the hook beak 41 hits the tip of the tooth of the wheel gear 18, the tension of the single-sided adhesive tape 1 is gradually increasing because the binding arm 7 is in the process of falling down, and this increase in tension causes the tape wheel to 16 is slightly rotated, thereby dropping the hook beak 41 between the teeth of the wheel gear 18.

Hereinafter, the operation of the tape tightening mechanism of the present invention will be explained. First, when the binding arm 7 is erected to the maximum extent by the spring force of the return tension spring 14, the timing operation claw 24 is moved against the timing plate 29.
It is stationary at a position lower than the engaging claw 36 of. At this time, the protrusion 35 of the timing plate 29 is inserted into the engagement hole 33 of the fixed engagement plate 31, so that the timing plate 29 remains stationary. The condition of this timing plate 29 is exactly the same as that shown in FIG.
1 is not engaged with the wheel gear 18. Therefore, the tape wheel 16 is in a free rotation state.

When the binding arm 7 is in the maximum upright state, the single-sided adhesive tape 1 unwound from the tape wheel 16 of the tape supply mechanism 4 is attached to the tape guide pin 1
2. It is stretched without loosening between the tape guide pin 9a, the binding arm-side tape adhesion mechanism 6B, and the base-side tape adhesion mechanism 6A. In particular, the binding arm side tape adhesion mechanism 6B and the base side tape adhesion mechanism 6B
The single-sided adhesive tape 1 is stretched in a straight line between these tape adhesion mechanisms 6A and 6B, with a maximum distance between the tape adhesion mechanisms 6A and 6B. When an operator places a group of articles such as vegetables on the article holder 11 while pressing the adhesive surface 1a of the single-sided adhesive tape 1, the single-sided adhesive tape 1 is assembled into a roll attached to a freely rotating tape wheel 16. The wrapping tape 16b is further unwound.

Next, when the operator lowers the binding arm 7, the timing operation base plate 21 rotates clockwise around the pivot shaft 8a integrally with the binding arm 7. As a result, the timing operation claw 24
While moving counterclockwise about the pivot shaft 8a, one end 24a engages with the engaging pawl 36 of the timing plate 29, and rotates the timing plate 29 counterclockwise.

The hook plate 19 rotates counterclockwise around the hook shaft 28 in unison with the timing plate 29, and when the hook plate 19 rotates slightly from the position shown in FIG. It is inserted between the teeth, thereby locking the wheel gear 18 against rotation.

Further, in the process of the binding arm 7 being lowered, the timing plate 29 is further rotated counterclockwise against the spring force of the torsion coil spring 30, and the timing plate 29 is rotated counterclockwise against the spring force of the torsion coil spring 30.
7 engages the stopping leaf spring 32, the rotation of the timing plate 29 is stopped. In this state of the timing plate 29, the timing plate 29
9 is stationary at a position slightly apart from the locking plate 34 in the counterclockwise direction. The hook beak 41 of the hook plate 19 is biased by the torsion coil spring 30 to more strongly engage the wheel gear 18.
pressed against.

Immediately after the positioning groove 37 of the timing plate 29 engages with the stopping leaf spring 32, the timing operation pawl 24 separates from the engagement pawl 36 of the timing plate 29.

The length of the unwound single-sided adhesive tape 1 becomes shorter relative to the length of the tape running path as the amount of the binding arm 7 is lowered increases, so that the tape wheel 16 and the base, which are locked in rotation, become shorter. The tension of the single-sided adhesive tape 1 with the side tape adhesion mechanism 6A gradually increases without fail, and a strong tightening force is applied to the group of articles.

After the group of articles is bundled, the loop of the single-sided adhesive tape 1 around the group of articles is closed, and the ends and middle portions of the overlapped single-sided adhesive tapes 1 are separated from the continuous single-sided adhesive tape 1, they are further bundled. When the arm 7 is moved downward, the hook release operation plate 2
3 presses the roller 40 at the lower end of the timing plate 29 counterclockwise, thereby causing the timing plate 29 to
The engagement between the positioning groove 37 and the stopping leaf spring 32 is released. As a result, hook plate 19
The force pressing against the wheel gear 18 disappears.

Another embodiment of the present invention will be described in detail based on FIG. In this embodiment, the timing plate 29 used in the previous embodiment is not present.

In the description of this embodiment, the same reference numerals are used to designate the same parts as in the embodiment shown in FIGS. 1 to 4. The hook plate 42 is pivotally attached to the hook shaft 28. A torsion coil spring 30 is disposed between the rear surface 42b of the hook plate 42 having a hook beak 42a at the tip and the wheel support base 15, thereby constantly biasing the hook plate 42 in the counterclockwise direction. .
A roller 43 as a driven cam is provided at the lower end of the hook plate 42.

An engaging claw portion 44 is formed at one location on the back surface portion 42b of the hook plate 42.

A clamping spring 46 for clamping the roller 43 of the hook plate 42 is fixed to the wheel support base 15 by bolts 45. This clamping spring 4
Reference numeral 6 serves to keep the hook plate 42 stationary so that the hook plate 42 does not lock the rotation of the wheel gear 18 against the spring force of the torsion coil spring 30.

A timing operation claw 47 is pivotally supported by a tightening bolt 48 on a timing operation base plate 21 that is integrally connected to the binding arm 7. This tightening bolt 48 can be fixed at any position within an arc-shaped adjustment hole 49 bored in the timing operation base plate 21. Thereby, the position of the pivot center of the timing operating claw 47 can be changed, and the timing at which the timing operating claw 47 engages with the hook plate 42 can be changed. By adjusting this engagement timing, the tape tightening force is adjusted.

The lower end 47a of the timing operating claw 47 and the spring hook 50 fixed to the timing operating base plate 21 are connected by a tension coil spring 50a, thereby urging the timing operating claw 47 in the counterclockwise direction in FIG. .

An arcuate stop protrusion 51 is provided on the timing operation base plate 21 substantially parallel to the adjustment hole 49. This stop protrusion 51 is for stopping the rotation of the timing operation pawl 47 by the tension coil spring 50a.

The lower end portion of the timing operation base plate 21 protrudes toward the wheel support base 15, and the hook release operation portion 52
has been achieved.

In this embodiment, the timing operation claw 47
By changing the timing of engagement between the hook plate 42 and the hook plate 42, the tape tightening force can be changed.

In each of the above embodiments, an example of binding using a single-sided adhesive tape was shown, but an example of binding may be used in which a non-adhesive tape is used and the tape loop is closed using heat sealing.

<Effects of the present invention> As described above, according to the present invention, the tape wheel that unwinds the tape is locked in a state where it cannot rotate, and the length of the unwound tape and the length of the tape running path are adjusted. On the other hand, since the length of the unwound tape is shortened, a strong tightening force can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a partial vertical sectional view of a binding machine incorporating the tape tightening mechanism of the present invention, FIG. 2 is a detailed side view of the tape tightening mechanism, and FIG. 3 is a plan sectional view of the tape tightening mechanism. FIG. 4 is a sectional view showing the relationship between the timing plate and the fixed plywood, and FIG. 5 is a detailed side view of a tape tightening mechanism according to another embodiment of the present invention. FIG. 6 is a schematic side view showing a conventional example. 1... Single-sided adhesive tape, 2... Binding machine, 3... Base,
5... Tape tightening timing mechanism, 6A... Base side tape adhesion mechanism, 6B... Binding arm side tape adhesion mechanism, 7... Binding arm, 9a... Tape guide pin, 16... Tape wheel, 19... Hook plate, 21... Timing operation Base plate, 24...timing operation claw.

Claims (1)

[Claims] 1. A base, a tape wheel rotatably supported on one end of the base and for unwinding the tape, a locking member for locking the tape wheel non-rotatably, and a tape wheel rotatably supported on one end of the base, a base-side tape adhesion mechanism provided; a binding arm pivotally supported to be able to rise and fall with respect to the base at a position close to the tape wheel; and a locking member that pivots integrally with the binding arm; an operating member for locking or releasing the tape wheel with respect to the tape wheel; and an operating member disposed on the binding arm and cooperating with the base-side tape adhesion mechanism to close the loop formed by the tape that collects the group of articles. It consists of a tape adhesion mechanism on the binding arm side that adheres the tape, and a tape guide installed at a position where the tape unwinding length when the binding arm is laid down is greater than the tape unwinding length when the binding arm is upright. A tape tightening mechanism of a binding machine in which a tape wheel is locked so as not to rotate by a locking member.