JPH0761431A - Clip fixing device - Google Patents

Abstract

PURPOSE:To prevent fatigue from inflicting on operator's arm even in the case of continued operation by a method wherein an operating lever is energized by a composite structure that is composed of a first spring that energizes a working lever with energizing force applied in proportion to its turning angle and a second spring that energizes the working lever in the opposite direction when the working lever passes through a specified point. CONSTITUTION:As an operating lever 12 is pulled with a guide groove 25 loaded with a group of clips, a working lever 14, equipped with a round contacting part 14a and a slot 18 for loose-fitting of a fixing pivot 17 therein at one end and a pin 19 for holding a first spring 15 and a second spring 16 at the other end, is pushed and moved round a pivot 13. Then, a pin 22, loose-fitted in a notch 21, is pushed forward, projecting a push rod 21, and the clips are pushed out through a hollow needle 26. Energizing force applied at this time by the operating lever 12 is almost constant by virtue of the first spring 15 and the second spring 16 that constitute a composite spring, and the working lever returns to its original position as the operating lever 12 is loosened. Thereby, almost constant energizing force is obtained regardless of turning angles of the working lever 14 and the operating lever 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a locking piece attaching device for attaching a label, a price tag, etc. to a product etc. one by one with a locking piece made of synthetic resin.

[0002]

2. Description of the Related Art In a conventional locking piece attaching apparatus, when a locking piece is driven out of a hollow needle by a manual operating lever, the operating lever is returned by a single spring.

[0003]

However, in the conventional locking piece attaching device as described above, since the urging force for returning the operating lever is exerted by the single spring, the moving distance of the operating lever varies. There was a proportional bias. For this reason,
If the worker repeats the installation work hundreds of times, his hands and arms become tired, and in the worst case, there is a drawback of causing tendinitis and the like.

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide an engaging piece attaching device in which the arm is less fatigued even when used for a long time.

[0005]

In order to achieve the above-mentioned object, the gist of the present invention is to provide a locking piece feeding mechanism in which a locking piece is driven out of a hollow needle by an operating lever, with a rotating shaft as the center. An operating lever that rotates a predetermined angle, a first spring that biases the operating lever with a biasing force that is proportional to the rotation angle, and an operating lever that sequentially increases from the start point of rotation to a predetermined point. The operating lever is biased by a synthetic spring mechanism composed of a second spring that is biased and then biases in the opposite direction when a predetermined point is passed.

[0006]

In the locking piece attaching device according to the present invention, since the synthetic spring having a substantially uniform repulsive force is used regardless of the turning angle of the lever, it is possible to prevent the operator's hand and arm from being fatigued. I can.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of a main part of a locking piece attaching device according to an embodiment of the present invention, and FIG. 2 is a side view showing the whole. The locking piece attachment device includes a shaft 1 on the device body 10.
An operation lever 12 is rotatably supported via 1. Inside the grip portion 10a of the apparatus body 10, the rotating shaft 1
3, the operating lever 14 that rotates by a predetermined angle, the first spring 15 that biases the operating lever 14 with a biasing force that is proportional to the rotation angle, and the operating lever 14 from the starting point of the rotation. It is configured to urge the actuating lever 14 by a combined spring mechanism composed of a second spring 16 which is urged to sequentially increase until a fixed point and is urged in the opposite direction when a predetermined point is passed. There is.

The operating lever 14 has a circular contact portion 1 at one end.
Elongated hole 1 having 4a and in which fixed shaft 17 is loosely fitted
8 is formed. In addition, at the other end, the first spring 15
Also, the pin 19 on which the second spring 16 is locked is provided upright. Further, a U-shaped notch 20 is formed at the tip end portion, and is loosely fitted to a pin 22 provided upright at the base end of the push rod 21.

The contact portion 14a of the operating lever 14 is in contact with the back surface of the operating lever 12, and the operating lever 1 is manually operated.
By gripping 2, the rotary shaft 13 is rotated in the direction of arrow A. The rotating shaft 13 is erected on a fixed plate 23, and the fixed plate 23 is fixed in the grip portion 10 a of the apparatus body 10.

Further, a pin 24 is erected on the fixed plate 23, and the first spring 1 is provided between the pin 24 and the pin 19.
Five are stretched. A second spring 16 is stretched between the fixed shaft 17 and the pin 19.

FIG. 3 shows a first spring 15 and a second spring 16.
FIG. 9 is an explanatory diagram showing a change in biasing force due to displacement of a combined spring and an operating lever that are combined with each other. In this embodiment, approximately 600 g
It is kept nearby. Therefore, the actuating lever 14 and the operating lever 12 that is in contact with the actuating lever 14 can obtain a substantially constant biasing force regardless of the rotation angle.

FIG. 4 shows the first spring 15 and the actuating lever 12.
FIG. 6 is an explanatory diagram showing the relationship between the displacement and the biasing force of the first spring 15. In this example, the initial value of the biasing force was set to 300 g. Therefore, at point A, the urging force is 300g.
And increased almost linearly to 900 g at point B.

FIG. 5 shows the second spring 16 and the operating lever 14.
FIG. 6 is an explanatory diagram showing a change in biasing force due to displacement of the. The biasing force at the point A is 300 g, the fixed shaft 17, the rotary shaft 13, and the pin 19 are 0 g at the central portion C, which is aligned, and -300 g at the point B.

6 to 8 are schematic diagrams showing the relationship between the second spring 16 and the urging force of the operating lever 14. As shown in FIG. 6, when the operating lever 14 is at the point A, the second spring 16
Urges the operating lever 14 to rotate in the arrow X direction. Further, when the fixed shaft 17, the pin 19, and the rotating shaft 13 reach the point C aligned in a straight line, the biasing force of the second spring 16 becomes zero (see FIG. 7).

Further, as shown in FIG.
When is rotated beyond the point C, the second spring 16 receives the urging force in the arrow Y direction. It reaches the maximum at point B. That is, the urging force that the actuating lever 14 receives by the second spring 16 is in the opposite direction at the points A and B.

Next, the operation of the locking piece attaching device according to the above embodiment of the present invention will be described. First, a locking piece group (not shown) is loaded in the guide groove 25, and when the operation lever 12 is pulled, the actuating lever 14 is pushed to rotate about the rotation shaft 13. When the actuating lever 14 rotates, the pin 22 loosely fitted in the notch 20 is pushed forward and the pushing rod 21 is projected.

When the push-out rod 21 projects, the locking piece at the lowermost end is pushed out from the hollow needle 26. During the pushing operation of the locking piece, the operating lever 12 has a substantially constant biasing force.
Next, when the operating lever 12 is loosened, the first spring
The spring 15 and the second spring 16 restore the original position.

The present invention is not limited to the above embodiments, and various design changes can be made based on the technical idea of the present invention.

[0019]

As described above, according to the present invention, in the locking piece feeding mechanism for driving the locking piece from the hollow needle by the operating lever, the operating lever that rotates about the rotation axis by a predetermined angle and the operating lever. And a first spring for urging the operating lever with an urging force proportional to its rotation angle, and urging the operating lever so as to sequentially increase from a start point of rotation to a predetermined point, and when the predetermined point is passed, the reverse direction is obtained. The operation lever is urged by the combined spring mechanism composed of the second spring that urges the operator, and the urging force is constant regardless of the displacement of the operation lever. Even if it is used without it, it does not get tired easily. In addition, the risk of tendinitis and the like can be eliminated.

[Brief description of drawings]

FIG. 1 is a configuration diagram of essential parts showing a locking piece attaching device that is an embodiment of the present invention.

FIG. 2 is a side view showing the entire locking piece attaching device.

FIG. 3 is an explanatory view showing a change in biasing force due to displacement of a synthetic spring and an operating lever used in the locking piece attaching device.

FIG. 4 is an explanatory view showing a change in biasing force due to displacement of a first spring and a working lever which constitute a composite spring.

FIG. 5 is an explanatory diagram showing a change in urging force due to displacement of a second spring and a working lever constituting a composite spring.

FIG. 6 is a schematic diagram showing the relationship between the displacement of the second spring and the operating lever.

FIG. 7 is a schematic diagram showing a relationship between displacements of a second spring and an operating lever.

FIG. 8 is a schematic diagram showing the relationship between the displacement of the second spring and the operating lever.

[Explanation of symbols]

 10 Device Main Body 11 Shaft 12 Operation Lever 13 Rotating Shaft 14 Actuating Lever 15 First Spring 16 Second Spring 17 Fixed Shaft 18 Elongated Hole 19 Pin 20 Notch 21 Extrusion Rod 22 Pin 23 Fixing Plate 24 Pin 25 Guide Groove 26 Hollow needle

Claims (1)

[Claims] 1. A locking piece feeding mechanism for driving a locking piece from a hollow needle by an operating lever, and an operating lever which rotates about a rotation axis by a predetermined angle, and an operating lever which is proportional to the rotation angle. A first spring that is biased by a biasing force, and a second spring that biases the actuating lever so as to sequentially increase from a start point of rotation to a predetermined point, and when the predetermined point is passed, the spring is biased in the opposite direction.
A locking piece attachment device, characterized in that the operating lever is biased by a synthetic spring mechanism composed of the above spring.