JPH0138003Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention provides a tape winding mechanism that rotates the tape reel in the tape rewinding direction in conjunction with the raising and lowering of the binding arm between the binding arm and the tape reel. The present invention relates to an improvement of a binding device provided with a return mechanism.

(Prior Art) Conventionally, a binding device has a mechanism that rotates the tape reel in the tape rewinding direction in conjunction with the raising and lowering of the binding arm between the binding arm and the tape reel, and winds the tape around the object to be bound. A tape rewinding mechanism is provided for rewinding excess binding tape out of the binding tape.

6 and 7 show a conventional tape rewinding mechanism, which is equipped with a rotational power transmission mechanism that connects a rotational support shaft b of a binding arm a and a support shaft d of a reel c. In the same mechanism, e is a first intermediate shaft, and a large pulley f attached to the shaft e and a small pulley g attached to the support shaft d of the reel c are connected by a belt h. i is a second intermediate shaft, which meshes and connects the second gear j attached to the shaft i and the first gear k attached to the first intermediate shaft e, and also serves as a rotation support shaft for the second gear j and the binding arm a. It is meshed and connected with the sector gear attached to b.

A one-way clutch m is interposed between the support shaft d and the reel c. The one-way clutch m transmits the rotation to the reel c when the support shaft d is driven counterclockwise, and cuts off the transmission when the support shaft is rotated in the opposite direction (see Japanese Patent Publication No. 57-40008).

(Problems to be solved by the invention) In the conventional example as described above, the number of parts was large and the configuration was complicated.

The present invention was devised to solve this problem, and aims to provide a binding device with a simple configuration.

(Means for Solving the Problems) In the present invention, the tape rewinding mechanism is composed of a rack pivotally supported on a base, a pinion provided on a binding arm, and a tape reel attached to the shaft of the pinion. be.

(Function) When the binding arm is tilted, the pinion easily engages and rotates, and the tape reel accordingly rotates in the tape rewinding direction.

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

In FIGS. 1 and 2, 1 is a base, and a frame 2 is provided at the center of the base. A binding arm 4 is attached to the frame 2 so as to be rotatable about a shaft 3. An upright plate 5 is provided at one end of the base 1, and a support plate 6 and a support plate 7 are provided at the other end of the base 1. On the standing board 5,
A rotating body 8 is provided so as to be rotatable in a fixed direction about a shaft 9 as a fulcrum. This rotating body 8 is a clamping member 1
The clamping member 10 has the function of clamping the cut end of the binding tape, which will be described later, in cooperation with the shaft 1.
1 as a fulcrum and is biased to rotate in the direction of arrow A in FIG. In FIG. 2, the slope 4a of the binding arm 4 is in contact with the clamping member 10, and the free end of the clamping member 10 is separated from the rotating body 8.
The cut end of the binding tape, which will be described later, is open.

One end of a rack 12 is pivotably attached to the support plate 6 on its shaft 6a. This rack 12 will be described later.

One end of a spring 14 is locked to the support plate 7, and the other end of the spring 14 is connected to the binding arm 4.
The spring 14 is fixed to the binding arm 4.
It has the function of biasing the body in the direction of standing up.

15 is a tape rewinding mechanism, and the tape rewinding mechanism 15 is composed of a pinion 13 and a rack 12.

The pinion 13 is attached and fixed to the front side of the binding arm 4 in the figure of a shaft 16 that rotatably penetrates the binding arm 4, and a tape reel 17 is attached to the opposite side of the shaft 16 via the binding arm 4 in the figure. is attached via a one-way clutch (not shown) that transmits only clockwise rotation in the figure, and a binding tape 18 is attached to the tape reel 17. Therefore, only when the pinion 13 rotates clockwise in the figure, that is, only when rewinding the binding tape 18, the rotation is transmitted to the tape reel 17, and the pinion 13 raises the binding arm 4 from the tilted state. When pulling out the binding tape 18 or when pulling out the binding tape 18, the pinion 13 and tape reel 17 function independently.
No transmission relationship is established between the two 13 and 17.

The binding tape 18 attached to the tape reel 17 is guided toward the binding arm 4 via a roller 19, and its cut end is attached to a tape holding device 2 roughly composed of a rotating body 8 and a clamping member 10.
It is designed to be held at 0.

The rack 12 extends diagonally upward to the right in FIGS. 1 and 2, and its lower end 12a is outwardly arcuate. , sliding contact is made in response to the raising and lowering of the binding arm 4, thereby making it easy to
2 is prevented from rotating clockwise about the shaft 6a as a fulcrum due to its own weight, and the pinion 13 and rack 12 maintain a meshing relationship.
This meshing relationship is such that the pinion 1 is located in the center of the rack 12.
When position 3 is located, rack 12 and pinion 13
The rack 12 and pinion 13 engage with each other most deeply, and as the pinion 13 moves away from the center of the rack 12, the rack 12 and pinion 13 engage with each other more shallowly.
When the is in the upright position (see Figure 1), the binding arm 4
When the rack 12 and the pinion 13 are in a tilted state (see FIG. 2), the meshing relationship between the rack 12 and the pinion 13 is released.

In FIG. 2, which shows a state immediately after the winding end of the binding tape 18 wound around the object B is crimped, 21 is a crimping plate, and 22 is a pressure receiving plate.

Next, the action will be explained.

FIG. 1 shows the upright state of the binding arm. After applying the binding tape 18 to the front end of the binding tape, the binding tape 18 is pulled out, and the binding arm B is then placed on the mounting table. At this time, the meshing relationship between the rack 12 and the pinion 13 is released as shown in FIG. 1, and the one-way clutch (not shown) does not transmit the counterclockwise rotation of the tape reel to the pinion 13. Therefore, the tape reel 17 is allowed to rotate counterclockwise, and the binding tape 18 can be drawn out smoothly. After that, when the binding arm 4 is tilted, the rack 12 and pinion 13 engage with each other.
The pinion 13 is rotated clockwise in the figure. At the same time, this clockwise rotation of the pinion 13 causes the tape reel 1 to rotate through a one-way clutch (not shown).
7, and the binding tape 18 is rewound.

When the binding arm 4 is in the tilted state as shown in FIG. 2, the meshing relationship between the rack 12 and the pinion 13 is released, and no further unwinding force is applied to the binding tape 18, and the state is maintained. At this point, the objects B to be bound are bound together.

When the binding arm 4 is raised after the objects B are tightly bound and the binding of the objects B is completed, the pinion 13 is rotated counterclockwise in the figure due to the meshing relationship between the rack 12 and the pinion 13. , Finally, as shown in Fig. 1, pinion 13 and rack 1
The meshing relationship with 2 is released. At this time, the counterclockwise rotation of the pinion 13 is not transmitted to the tape reel 17 by the one-way clutch (not shown). Therefore, when the binding arm 4 is raised, the tape reel 17 is It is not rotated and the binding tape 18 does not loosen.

3 and 4 show a roller 19 that guides the binding tape 18, and the roller surface has several pairs of grooves 19a symmetrically in FIG. 3 as they move inward. The ring 19b is partially opened and has a round wedge-shaped protrusion 19c formed near the opening side, and is fitted into the pair of grooves 19a. ing. The ring 19b is made of elastic rubber, a metal spring, or the like.

Thereby, a roller width corresponding to the width of the binding tape 18 can be obtained, and the binding tape 18 is wound concentrically around the object B without meandering. Therefore, the object to be bound B can be wrapped with the minimum amount of binding tape 18.
This allows the binding tape 18 to be saved and the tightening performance to be improved.

FIG. 5 shows another embodiment, and explanations of the same components as those of the previous embodiment will be omitted.

In this embodiment, a support plate 23 having a shaft 23a penetrating and rotatable is provided on the base 1, and a pinion 13 is fixedly attached to the front side of the support plate 23 in the figure of the shaft 23a. A tape reel 17 is attached to the opposite side of the support plate 23 in the figure via a one-way clutch (not shown) that transmits only clockwise rotation in the figure, and one end is connected to the pinion 13 and the binding arm 4 is connected to the tape reel 17. The rack 12, which is pivotally mounted, is placed over the rack 12 from above. Therefore, the binding arm 4 is
If you tilt it from the standing position shown in the figure, it will be easy 1.
2 is displaced to the right in the figure, and the meshing relationship between the rack 12 and the pinion 13 causes the pinion 13 to rotate clockwise in the figure. The clockwise rotation is controlled by the tape reel 1 through a one-way clutch (not shown).
7, and the binding tape 18 is rewound. When the binding arm 4 is raised from the tilted state,
The rack 12 is displaced to the left in the figure, and the rack 1
Due to the meshing relationship between pinion 2 and pinion 13, pinion 1
3 is rotated counterclockwise in the figure. The counterclockwise rotation is not transmitted to the tape reel 17 by a one-way clutch (not shown), and the binding tape 18
It doesn't loosen up.

Incidentally, when the binding arm 4 is in the upright state (see FIG. 5) or in the tilted state, the meshing relationship between the rack 12 and the pinion 13 is released, as in the previous embodiment. Reference numeral 24 denotes a regulating member that prevents the rack 12 from springing upward as the binding arm 4 moves up and down. is a leaf spring and is in contact with the rack 12. Of course, the tip portion 24a may be made of an elastic member such as rubber.

According to this embodiment, a tape reel 17, a binding tape 18 attached to the tape reel 17,
Since the pinion 13 is supported by the support plate 23 provided on the base 1, the operation of raising and lowering the binding arm 4 becomes easier.

Although the embodiments have been described above, the present invention is not limited thereto; for example, in the first embodiment, the rack may be engaged with the pinion so as to cover it from above.

Further, the regulating member may be a rotatable roller or a pin.

As is clear from the above, in the present invention, the tape rewinding mechanism is composed of a rack and a pinion, which reduces the number of parts and simplifies the structure.

Also, since there are fewer parts, there is less friction and therefore easier operation.

Furthermore, since the only meshing elements are the rack and pinion, the spacing between these teeth can be increased.
Therefore, even at the boundary between the raising and lowering movements of the binding arms, they are surely engaged.

Furthermore, since the number of parts is small, it can be provided at low cost.

Furthermore, as mentioned above, since it is composed of only a rack and a pinion and does not use a belt, there is no slippage and the operation is reliable.

[Brief explanation of the drawing]

FIG. 1 is an overall view showing the main parts of the binding device according to the present invention in detail, FIG. 2 is a diagram showing the operating state of FIG. 1, FIG. 3 is a front view of the roller, and FIG. teeth,
3 is a side view, FIG. 5 is an enlarged view of main parts showing another embodiment, FIG. 6 is a front view of the conventional example, and FIG. 7 is a plan view of FIG. 6. 4... Binding arm, 12... Rack, 13... Pinion, 15... Tape rewinding mechanism, 17... Tape reel.

Claims (1)

[Claims for Utility Model Registration] A tape rewinding mechanism that rotates the tape reel in the tape rewinding direction in conjunction with the raising and lowering of the binding arm, which is provided between the binding arm pivotally supported on the base and the tape reel. In the binding device, the tape rewinding mechanism includes a rack and a pinion that can engage with each other when the binding arm is tilted, and either the rack or the pinion is attached to the base, and the other is attached to the base. are rotatably attached to the tying arms, and further, the tape reel is attached to the shaft of the pinion via a one-way clutch.