JPH0512209B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a binding machine that tightly wraps and binds objects to be bound using a binding tape, and more specifically, a binding machine equipped with this type of binding machine. This invention relates to an improvement in a tape rewinding mechanism.

(Prior art) Conventionally, a device has a guide block that guides the binding tape pulled out from the wrapping tape and a holding block that clamps the cut end of the binding tape, and the binding tape stretched between the two blocks is BACKGROUND ART A binding machine is known in which the objects to be bound are wrapped and bound with a binding tape by applying the objects to be bound and bringing a guide block into close contact with a holding block.

This type of binding machine is generally equipped with a tape rewinding mechanism, and the tape rewinding mechanism ensures the tight binding of the objects to be bound.

A binding machine equipped with such a tape rewinding mechanism can reliably and quickly bind objects to be bound, so it is used for binding agricultural products such as vegetables and flowers. It is beginning to be applied to the binding of various objects, such as electric wires bundled in a ring shape.

By the way, a conventional tape rewinding mechanism is configured to apply a tape rewinding rotational force at a fixed angle of rotation to the axis of a tape reel on which a winding tape is attached.

From this, as the winding thickness of the winding tape attached to the tape reel becomes thinner, that is, as the radius length of the winding tape attached to the tape reel becomes shorter, the amount of tape unwinding decreases, and as a result, the binding work As the process was repeated, the back tension tended to weaken.

In recent years, as binding machines have become more widespread, there has been an increasing demand for thicker wrapping tapes that need to be replaced less frequently, and as the range of objects to be bundled has expanded, there has been a need for thicker wrapping tapes to be used. It is hoped that a machine will emerge. However, the thicker the winding tape used, the more the above-mentioned problems become apparent, so naturally it is necessary to limit the thickness of the winding tape that can be used, and in order to meet the above request, It was something I couldn't get.

(Purpose) The present invention has been made in view of the above-mentioned circumstances, and its purpose is to provide a constant value regardless of the thickness of the winding tape, that is, the radius of the winding tape. To provide a tape rewinding mechanism for a binding machine capable of applying back tension to a binding tape depending on the amount of unwinding.

(Structure) For this purpose, the present invention is configured such that a drive roller that applies rotational force in the direction of unwinding the binding tape to the winding tape is brought into contact with the outer surface of the winding tape.

(First Embodiment) Figures 1 and 2 show a first embodiment of the present invention, which is a type of binding of objects to be bound by raising and lowering a binding arm pivotally connected to a base. The case where it is applied to a binding machine is also shown.

The overall configuration of the binding machine will be explained with reference to FIG. 1. However, since the rest of the configuration except for the tape rewinding mechanism is the same as that of conventionally known binding machines, the description of the known parts will only be a general description. stay.

In FIG. 1, 1 indicates a base. An upright plate 2 is fixed to one side of the base 1, and a tape clamping means 3 is fixed to the other side.A binding arm 4 is pivotally connected to the upright plate 2 so as to be movable up and down. (omitted) in the standing direction.

A tape crimping/cutting means 6 is disposed at the tip of the binding arm 4, and a tape holding means 3 is disposed at a position where it collides with the tape crimping/cutting means 6 when the binding arm 4 is tilted. ing.

The tape clamping means 3 has a function of clamping and releasing the cut end 10b of the binding tape in cooperation with the tape crimping/cutting means 6, and includes a pressure receiving plate 31 and a clamping member disposed at a distance from the pressure receiving plate 31. plate 32, the clamping plate 3
The rotating body 33 is biased in the direction of colliding with the binding tape 2 and cooperates with the clamping plate 32 to clamp the cut end 10b of the binding tape 10a.

The tape pressing/cutting means 6 collides with the rotating body 33 and displaces the rotating body 33 in a direction away from the clamping plate 32, and also includes a pressure roller 61, a cutting blade 62, and a pressure receiving plate 31, which rotate the rotating body 33. It is generally composed of a pressure bonding plate 63 that abuts against each other and pressure-bonds both winding ends of the binding tape, and a tape relief rod 64 that is further biased in the direction of the tape clamping means 3.
Here, the tape escape rod 64 is provided with a tape guide roller 65 at its upper end, and the winding end of the binding tape wound around the object to be bound is cut by the cutting blade 62. enters into the space 34, it actively gives slack to the binding tape 10a pulled out from the wrapping tape 10, and the binding tape 1 between the clamping plate 32 and the rotating body 33 is
This is to prevent a mistake in holding the newly cut end of 0a. In FIG. 1, reference numeral 8 denotes a guide roller rotatably attached to the binding arm 4. A binding tape 10a pulled out from a wrapping tape 10 to be described later is attached to guide rollers 8, 8 of the binding arm 4.
...and the tape guide roller 6 of the tape release rod 64
5, the cut end 10b is held by the tape holding means 3, and the binding tape 10a is stretched between the tape crimping/cutting means 6 of the binding arm standing by and standing by and the tape holding means 3. Place the object A to be bound on the installation part and push it down to the mounting table 12,
Thereafter, by tilting (winding) the binding arm 4, the object A is wound with the binding tape 10a, and the tape crimping/cutting means 6 collides with the tape holding means 3, whereby the object A is wrapped around the object A. The ends of the wound binding tape are crimped and cut, and the binding work is completed.

When the binding tape 10a is wound around the objects to be bound A, that is, in conjunction with the tilting movement of the binding arm 4, the tape rewinding mechanism is activated to apply back tension to the binding tape 10a, and A is promised a tight bond.

The tape rewinding mechanism 40 includes a fan gear 41, a driving roller 42 and a driven roller 43 that come into contact with the outer surface of the winding tape 10, and one rolling roller 44 that comes into contact with the inner surface of the core 11 of the winding tape 10. It is roughly structured.

The fan gear 41 is integrally attached to a support shaft 5 that is rotatable with respect to the upright plate 2, and rotates as the binding arm 4, which is also integrally attached to the support shaft 5, is raised and lowered. . A gear 45 that meshes with this fan gear 41 is attached to a shaft 46.

The shaft 46 is rotatably provided with respect to the upright plate 2, and a well-known friction clutch (not shown) and a one-way clutch (not shown) are interposed between the shaft 46 and the gear 45. The rotating force applied to the gear 45 is transmitted to the shaft 46 via the fan gear 41 only during the tilting movement, that is, the winding movement. The fan gear 41 and the gear 45 are configured to release the meshing relationship at the end of the raising and lowering of the binding arm 4, allowing the binding tape 10 to be freely pulled out while the binding arm 4 is in standby state.
Also, unnecessary back tension is not applied at the final stage of the tilting movement of the binding arm 4, thereby preventing mistakes in pinching the cut end of the binding tape. As described above, the sprocket 47 and the drive roller 42 are integrally attached to the shaft 46 which is associated with the raising and lowering movement of the binding arm 4 and to which rotational force is applied when the binding arm 4 is tilted. As a result, a rotational force is applied to the sprocket 47 and the drive roller 42 during the tilting movement, that is, the winding movement of the binding arm 4. Here, the drive roller 42 is a stepped roller similar to the driven roller 43 described in detail later, which allows winding tapes of different tape widths to be attached, ensures center alignment, and prevents meandering of the binding tape. is planned.

A second shaft 48 is attached to the upright plate 2 at a distance from the shaft 46 that supports the drive roller 42, and as shown in FIG. A bearing 49 is interposed between the windings to allow the second shaft 48 to rotate freely. This second shaft 48
A driven roller 43 and a second sprocket 50 are integrally attached. The driven roller 43 is a stepped roller that is formed to have a stepped thickness on both sides in the axial cross section, and has a circumferential surface that coincides with the winding tape 1 having a different tape width.
The axial displacement of the winding tape 10 is restricted by the step which contacts the outer surface of the winding tape 10 and extends in the radial direction, thereby preventing meandering. This allows wrapping tapes with different tape widths to be attached, ensures center alignment, and facilitates attachment and detachment of the wrapping tape. This is intended to prevent irregular polymerization at both ends of the winding. A chain 51 is suspended between the second sprocket 50 and the above-mentioned sprocket 47, and transmits the rotational force of the shaft 46 to the second shaft 48, that is, the driven roller 43. Both rollers are configured to apply rotational force to the outer surface of the winding tape 10. In Figure 2,
Reference numeral 52 denotes a bearing holding cylinder, and a step 5 is formed on the outer peripheral surface of the tip extending between the upright plate 2 and the driven roller 43.
3 is provided, and one end of an arm 54 for the rolling roller 44 is loosely fitted therein. 55 is a ring that prevents the arm 54 from coming off.

A third shaft 57 is attached to the other end of the arm 54 and is rotatable via a bearing 56.
A rolling roller 44 is fixed to a shaft 57 of. The rolling roller 44 is preferably made of an elastic material such as rubber or soft plastic. On the other hand, a pin 58 is attached to the side of the arm 54 facing the upright plate 2.
is planted, and a tension spring 60 is stretched between the pin 58 and a pin 59 planted in the upright plate 2. Such a tension spring 60 is a winding tape 1
The rolling roller 44 in contact with the inner circumferential surface of the core 11 has the function of urging the rolling roller 44 toward the driving roller 42 and driven roller 43 side to press the winding tape against the inner circumferential surface of the core 11. It also has the function of allowing the moving roller 44 to be lifted and the winding tape 10 to be replaced.

The operation of the tape rewinding mechanism having such a configuration will be explained below.

First, the winding tape 10 is attached to the rolling roller 44.
is lifted against the tension spring 60, and the rolling roller 44 is located on the inner circumference side of the core of the winding tape 10, and the drive roller 42 is positioned on the outer circumference side of the winding tape 10.
and the driven roller 43. Due to the spring force of the tension spring 60, the wrapping tape 10 is supported at three points by the rollers 42, 43, and 43.

Binding tape 1 pulled out from wrapping tape 10
0a is held by the tape holding means 3 via the binding arm 4 as in the conventional case, and the binding operation is performed by raising and lowering the binding arm 4.

In the tilting movement of the binding arm 4, that is, in the process of winding the binding tape 10a around the object to be bound A, the rotational force of the gear 45 meshing with the fan gear 41 is transmitted to the drive roller 42 due to the presence of the one-way clutch. At the same time, it is also transmitted to the driven roller 43 by the chain 51, and the rotational force in the direction of unwinding the binding tape 10a is applied to the outer peripheral surface of the wrapping tape 10 by both rollers 42 and 43, and a back tension is applied to the binding tape 10a. will be given. At this time, in order to prevent the rolling roller 44 from being lifted,
It is preferable that the upright plate 2 is provided with a guide roller 21 .

(Second Embodiment) An embodiment of the present invention will be described using an example in which it is applied to an automatic binding machine.

The automatic binding machine shown in FIG.
This is a type of binding machine in which a state in which no binding tape is stretched between the cutting means 110 and the binding tape can be taken out to the front. This type of binding machine has already been developed by the applicant.
This was proposed in Patent Application No. 104787 of 1988, etc.
Links 121, 121, . . . are provided on the machine frame 120, respectively.
Upper and lower reciprocating plates 12 capable of reciprocating through...
2, 123 is attached to one side of the upper reciprocating plate 122, and the tape crimping/cutting means 110 is attached to one side of the lower reciprocating plate 12.
A tape clamping means 100 is provided on one side of the binding tape, and the cut end of the binding tape is clamped by the tape clamping means 100 by the collision of the two means 100 and 110 at B in the figure, and both means 100 and 110 at C in the figure 1
10, the ends of the binding tape wound around the object A are crimped and cut. In the figure, reference numeral 125 indicates a mounting table erected on a base 126. The reciprocating movement of the upper and lower reciprocating plates 122, 123 is performed by rotating the electric brake motor 130 in forward and reverse directions using a sequence circuit (not shown).

The tape rewinding mechanism 140 is attached to the upright plate 150 of the upper reciprocating plate 122. The tape rewinding mechanism 140 has a drive roller 14 similar to the first embodiment.
1. Since it is composed of a driven roller 142 and a rolling roller 143, the differences from the first embodiment will be explained below. In the tape rewinding mechanism 140 of this second embodiment, the driven roller 142 and the rolling roller 143 are constructed as stepped rollers.
The rotational force to the drive roller 141 is applied to the shaft 14
A belt 132 is applied across a pulley 145 attached to the motor 4 via a one-way clutch (not shown) and a pulley 131 associated with a motor 130, and a rotational force from an electric rotation drive source is applied. It's like that.

That is, the pulley 131 is integrally attached to a shaft 127 that is keyed to the link 121 that swings from the output shaft of the motor 130 by a gear train, and as the link 121 swings, the pulley 13
1 is configured to apply rotational force to the motor.

In the first and second embodiments, each roller 42, 4
3,142,143 is a stepped roller. This has the effect that centering can be easily performed when installing the winding tape. This means that
In the conventional method of fitting the wrapping tape onto a tape reel, one side of the wrapping tape was brought into contact with a flange provided on one side of the tape reel, so the binding tape The center line and the center line of the binding machine do not necessarily match, so the guide roll provided on the binding arm must be a flanged roller to prevent the binding tape from meandering.
For this reason, in order to use winding tapes of different widths, it was necessary to displace the position of the collar of the guide roller in the axial direction of the roller. However, when the wrapping tape is supported by stepped rollers as in the first and second embodiments, the center line of the binding tape can be aligned with the center line of the binding machine, and therefore the binding arm can be guided. It is not necessary to use a flanged roll to prevent meandering, and it is possible to use a drum-shaped roll to prevent meandering. Therefore, when using winding tapes of different widths, it is possible to save the effort of changing the position of the collar of the guide roll each time.

Although the embodiments of the present invention have been described above, the present invention is not limited thereto and also includes the following embodiments.

(1) The winding tape may be mounted on a tape reel in the same manner as in the past, and the shaft of the tape reel may be rotatable and biased toward the drive roller.

(2) In the above embodiment, the driven roller was associated with the driving roller, and both rollers applied rotational force to the outer surface of the winding tape. A rotational force may be applied to the outer surface of the tape.

(3) This also means that in the above embodiment,
Although the configuration is such that the driving roller is attached to a displaceable shaft and biased toward the driving roller, it may also be configured such that the rolling roller is attached to a fixed shaft and the driven roller is biased toward the rolling roller. . With this configuration, it is possible to prevent the rolling roller from rising when applying back tension.

(Effect) As described above, the present invention applies tape rewinding rotational force to the outer surface of the winding tape, so it is possible to bind the winding tape with a constant unwinding amount that is not affected by the winding thickness of the winding tape. It becomes possible to impart back tension to the tape, and it becomes possible to make the back tension uniform and to use a thickly wound tape, thereby eliminating the complexity of replacing the winding tape.

[Brief explanation of the drawing]

FIG. 1 is a side view of a binding machine to which the first embodiment is applied, FIG. 2 is a sectional view taken from the side shown in FIG. 1, and FIG. 3 is a side view of an automatic binding machine to which the second embodiment is applied. . 40... Tape rewinding mechanism of the first embodiment, 14
0...Tape rewinding mechanism of second embodiment, 42,1
41... Drive roll, 43, 142... Driven roll, 44, 143... Rolling roll, 51... Chain, 54... Arm, 60... Tension spring.

Claims (1)

[Claims] 1 Tape rewinding of a binding machine in which a drive roller that applies rotational force to the winding tape in the direction of rewinding the binding tape when winding the binding tape around the object to be bound comes into contact with the outer surface of the winding tape. mechanism.