JPH0133453Y2 - - Google Patents

Description

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

(Prior Art) Conventionally, a tape rewinding device is provided which rotates a tape reel in the rewinding direction of the binding tape in relation to the tilting movement of the binding arm, and the tape rewinding device is used to tighten the bundle of objects to be bound. A binding device is known that promises the following.

This type of binding device includes a tape reel for attaching the binding tape, a binding arm pivotally attached to one side of the base so that it can be raised and folded, and a tape holding means arranged on the other side of the base. A tape rewinding device is interposed between the tape reel and the binding arm, and the cut end pulled out from the binding tape attached to the tape reel is held by the tape holding means through the free end of the binding arm. Then, the object to be bound is applied to the binding tape stretched between the binding arm in the upright state and the tape holding means, and the tape reel is reeled by the tape rewinding device in conjunction with the tilting movement of the binding arm. is rotated in the direction in which the binding tape is rewound, the binding tape is wound around the object to be bound and tightened, and the binding arm and the tape holding means cooperate to unwind the binding tape around the object to be bound. The ends are fastened together, the wound tape and the subsequent unwound binding tape are cut, and the newly formed cut end is held by the tape holding means.

By the way, the conventional tape rewinding device that ensures this tight binding has been configured to transmit the rotational force in the tape rewinding direction to the tape reel during the entire tilting movement of the binding arm. .

Therefore, under the conventional tape rewinding device, the binding tape is
A force is applied in the direction of pulling out the cut end from the tape holding means, and in particular, the newly formed cut end is rewound before it is held by the tape holding means, and the tape holding means is unable to hold it. There was a risk that there would be cases where there was no such thing.

(Purpose of the invention) The present invention has been made to solve the problems of the prior art described above, and its purpose is to prevent the above-mentioned malfunction of the binding device, that is, to prevent the binding tape from being cut by the holding means. To provide a binding device which can securely hold the ends and perform binding while smoothly drawing out the tape.

(Structure of the invention) In order to achieve the above object, the present invention provides a binding arm that is interposed between the tape reel of the binding device and a binding arm that is pivotally attached to one side of the base so that it can be raised and lowered. a rotary plate having a tapered surface formed on its outer periphery, which is rotated as the binding arm is raised and lowered; It consists of a transmission plate that transmits rotation to an axis, a splicing plate attached to the outer periphery of the rotary plate, and a ball bearing, and the ball bearing transmits the transmission plate to the rotation at the end of the upright movement and the end of the tilting movement of the binding arm. and a transmission release mechanism that is spaced apart from the tapered surface of the plate to prevent the rotation of the rotary plate from being transmitted to the tape reel.

According to this configuration, the rotation of the binding arm is not transmitted to the tape reel by the transmission release mechanism at the final stage of the rising movement and the final stage of the tilting movement of the binding arm, so that there is a gap between the pressing rod of the binding arm and the pressure receiving table on the base side. When the object to be bound is pushed in, no tension is applied to the tape when it is pulled out, and when the tying arm is tilted for tying, tension is applied to the tape in the opposite direction. When the pressure rod of the binding arm and the pressure receiving table on the base side are in contact with each other, and the tape is being joined and cut, the end of the tape is placed near the pressure receiving table without any tension being applied to the tape. It can be held in place to prevent it from coming off.

(Example) Examples of the present invention will be described below based on the drawings.

FIG. 1 shows the overall configuration of the binding device according to the present invention, in which 1 is a base, a support frame 2 is erected on one side of the base 1, and a tape holding means 3 is on the other side. It is provided.

A tape reel 4 and a binding arm 5 are each rotatably attached to the support frame 2.

The tape reel 4 is rotatable about a shaft 6, and a binding tape 7 is attached to the tape reel 4. As the binding tape 7, adhesive tape is used here.

On the other hand, the binding arm 5 is attached to a shaft 8 attached to the support frame 2, and can be raised and lowered using the shaft 8 as a fulcrum.
It is urged in the upright direction by a spring 9. Further, a fan gear 10 is integrally attached to the binding arm 5, and the fan gear 10 rotates as the binding arm 5 moves up and down.

A tape rewinding device 11, which will be described later, is interposed between the fan gear 10 and the shaft 6, and a one-way clutch 12 is mounted on the shaft 6.

The one-way clutch 12 prevents the tape reel 4 from rotating in the direction in which the binding tape 7 is fed out when the binding arm 5 is moved upright, and the one-way clutch 12 prevents the tape rewinding device 11 from rotating in the direction in which the binding tape 7 is fed out when the binding arm 5 is raised. The rotational force is transmitted to the tape reel 4 to ensure rotational drive in the direction in which the binding tape on the tape reel 4 is rewound.

The free end portion 5a of the binding arm 5 is provided with a conventionally known tape crimping/cutting mechanism 13. The tape crimping/cutting mechanism 13 here generally includes a cutting blade 14 , a tape relief plate 15 , a tape crimping plate 16 , and a gap crushing plate 17 .

The binding arm 5 is rotatably provided with guide rollers 18, 19, and 23 at the free ends of the binding arms for passing the binding tape.

The tape holding means 3 on the base 1 is installed at a position where the pressure receiving plate 26 of the tape holding means and the crimping plate 16 of the binding arm 5 collide with the free end 5a of the binding arm 5 when it is tilted. . The tape holding means 3 is conventionally known and is composed of a clamping plate 24 and a rotating body 25 biased by a spring in a direction that abuts against the clamping plate 24. It has the function of pinching and holding the cut end 7a of the tape 7.

FIG. 1 also shows the binding machine in a standby state with the binding arm 5 returning to its upright position, and shows the cut end 7a pulled out from the binding tape 7 attached to the tape reel 4.
is guided by the rollers 23, 23, 18, and 19 of the binding arm 5, and its cut end 7a is held by the tape holding means 3, and the binding is performed between the free end 5a of the binding arm 5 and the tape holding means 3. The tape 7 is in a stretched state. This free end 5a and the tape holding means 3
Apply the object A to the binding tape 7 from the outside of the binding tape 7 extending between the binding tape 7 and the left hand in the figure, and insert it to the binding position B. Then, by tilting the binding arm 5, the binding tape 7 is attached to the object to be bound A.
When the free end 5a of the binding arm 5 collides with the tape holding means 3, both ends 5a and 3 work together to crimp both ends of the binding tape wound around the object A. , and the binding of the object to be bound A is completed. Then, when the binding arm 5 returns to its upright position, the new cut end 7a of the binding tape is held by the tape holding means 3,
Thereafter, based on this series of operations, the objects to be bound are continuously bound by raising and lowering the binding arm 5, but the tape rewinding device 11 operates to remove the tightened bundle. This makes it possible.

The tape rewinding device 11 is generally composed of a rotary plate 28 and a transmission plate 29.

FIG. 2 shows the tape rewinding device 11 in detail, and the shaft 30 fixed to the support frame 2 is connected to the rotating plate 28.
and gear 31 are fixed so as to rotate together. A tape reel 4 is attached to the periphery of the rotating plate 28.
A tapered surface 28a whose diameter is reduced in the direction opposite to the side is formed. Further, the gear 31 meshes with the fan gear 10.

On the other hand, the shaft 6 supporting the tape reel 4 has a key groove 34 extending in the axial direction.
A transmission plate 29 having a protrusion 35 that is loosely fitted into the key groove 34 is attached to the key groove 34 . A spring 36 is inserted through the outside of the transmission plate 29, and is further tightened from the outside in the tape reel 4 direction with tightening screws 37, 38, so that the transmission plate 29 is always elastically biased in the tape reel 4 direction. A tapered surface 29a is formed in the direction of engagement with the tapered surface 28a of the rotary plate 28 of the transmission plate 29, and a friction member 39 is attached to the tapered surface 29a.
The rotation plate 28 is biased to engage with the rotary plate 28, and the rotation of the rotary plate 28 is transmitted to the transmission plate 29.
A transmission release mechanism 40 is provided in a part of the rotating plate 28.

The transmission release mechanism 40 includes a splice plate 41 provided on a part of the periphery of a surface 28b of the rotary plate 28 on the tape reel 4 side, and a portion of the splice plate 41 that protrudes radially outward from the rotary plate 28, which is connected to the transmission plate 29. A ball bearing 42 is interposed on the side surface 41a, and when the ball bearing 42 is rolling on the surface 29b of the transmission plate 29, the tapered surface 2 of the rotating plate 28
8a and the friction member 39 attached to the transmission plate 29 are separated from each other, so that the rotation of the rotary plate 26 is not transmitted to the transmission plate 29.

When the binding arm 5 tilts and the rotary plate 28 rotates, and the transmission release mechanism 40 disengages from the surface 29b of the transmission plate 29, the tapered surface 28a of the rotary plate 28 and the friction member 39 of the transmission plate 29 are frictionally engaged and bound. The tilting motion of the arm 5 is transmitted to the tape reel 4. This frictional force can be adjusted by adjusting the tightening screws 37 and 38, that is, by adjusting the spring biasing force. The tapered surface 28a of the rotating plate 28 and the friction member 39 of the transmission plate 29 also act as a friction clutch.

As shown in FIG. 3, the transmission release mechanism 40 is configured such that the binding arm 5 comes into contact with the surface 29b of the transmission plate 29 near the end of the rising motion, and in this state, the binding arm 5 and the tape reel 4 are in contact with each other. This relationship is severed, allowing the tape reel 4 to rotate freely.

Further, as shown in FIG. 4, a transmission release mechanism 40
, when the binding arm 5 is at the end of the tilting movement, the transmission plate 29
In this state, the binding arm 5 and tape reel 4 are disconnected from each other. That is, immediately after the binding arm 5 tilts and the ends of the binding tape wound around the object A are crimped together, the rotational force due to the subsequent tilting movement of the binding arm 5 is not transmitted to the transmission plate 29. It's like that. Therefore, the transmission of rotational force in the direction (arrow X in FIG. 1) of rewinding the binding tape applied to the tape reel 4 by the tape rewinding device 11 is cut off, and the newly formed binding is cut off. The cut end 7a of the tape 7 is prevented from being rewound.

Tape rewinding device 11 configured in this way
The operation will be explained with reference to FIGS. 3 and 4.

From the standby state of the binding arm 5 shown in FIG. 3,
When the tilting movement is performed, the fan gear 10 rotates in the direction of arrow _Y1 in the figure in conjunction with this movement. The rotation of the fan gear 10 is transmitted to the rotating plate 28 via the gear 31,
The rotary plate 28 rotates in the direction of arrow _Z1 in the figure, and the rotary plate 28 and the transmission plate 29 are re-engaged. Due to the engagement between the rotary plate 28 and the transmission plate 29, the rotational force of the rotary plate 28 in the direction of arrow _Z1 is transmitted to the transmission plate 29, and the binding tape 7 is rewound onto the tape reel 4 in the direction shown in FIG. A rotational force is applied in the direction of the arrow X in FIG. 3, and the objects A are wrapped with the binding tape 7.

On the other hand, when the binding arm 5 returns to its upright position from the tilted state shown in FIG. 4, the fan gear 1
0 rotates in _two directions indicated by arrow Y in FIG. The rotation of the fan gear 10 is caused by the rotating plate 28 via the gear 31.
is transmitted, and the rotary plate 28 rotates in the direction of arrow _Z2 ,
Although the rotary plate 28 and the transmission plate 29 are re-engaged, since the one-way clutch 12 is interposed on the shaft 6, no rotation is transmitted to the tape reel 4. Therefore, since the relationship between the binding arm 5 and the tape reel 4 is released by the one-way clutch 12, no rotational force is applied to the tape reel 4.

(Effect of the invention) As described above, according to the tape rewinding device of the binding device according to the present invention, the rotational force to the tape reel is released near the upright state of the binding arm and at the end of the tilting movement of the binding arm, so the binding device This makes it possible to prevent malfunction of the binding tape, that is, to ensure that the cut end of the binding tape is held securely by the tape holding means.

Furthermore, rotation is transmitted by biasing the transmission plate against the rotation plate, and rotation is not transmitted by forcibly separating the transmission plate from the tapered surface of the rotation plate using the ball bearing of the release mechanism. As a result, effects such as switching between rotation transmission and transmission cancellation are reliably performed at appropriate times.

[Brief explanation of the drawing]

FIG. 1 is a schematic overall side view of the binding device of the present invention, and FIG. 2 is an enlarged sectional view of the main part of the tape rewinding device. FIGS. 3 and 4 are enlarged side views of essential parts, with FIG. 3 showing the binding arm at the final stage of its standing up motion, and FIG. 4 showing the binding arm at the final stage of its tilting motion. DESCRIPTION OF SYMBOLS 1... Base, 4... Tape reel, 5... Binding arm, 6... Shaft, 7... Binding tape, 11... Tape rewinding device, 12... One-way clutch, 28
... Rotating plate, 28a ... Tapered surface, 29 ... Transmission plate, 40 ... Transmission release mechanism, 41 ... Splinter plate, 42
……ball bearing.

Claims (1)

[Claims for Utility Model Registration] A tape reel of a binding device and a binding arm pivotally attached to one side of the base so that it can be raised and lowered, and that a rotating plate having a tapered surface formed on its outer periphery, which is rotated by the tape reel; and a transmission plate that is attached to the shaft of the tape reel and is biased by the tapered surface of the rotating plate to transmit the rotation of the rotating plate to the shaft. , consisting of a splint attached to the outer periphery of the rotary plate and a ball bearing, and the ball bearing separates the transmission plate from the tapered surface of the rotary plate at the final stage of the rising motion and the final stage of the tilting motion of the binding arm. A tape rewinding device for a binding device, comprising: a transmission release mechanism that prevents the rotation of the rotating plate from being transmitted to the tape reel; and a tape rewinding device for a binding device.