JPH0741571B2 - Article gripper - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bottling system such as a filling device and various packing devices used for gripping various products such as bottles.

[0002]

2. Description of the Related Art Although various improvements have been made in the past with respect to this type of article gripper, there are problems in that the structure is complicated and the gripping force is insufficient, and the gripping force is also low in terms of cost. It is quite difficult to find something satisfying.

[0003]

SUMMARY OF THE INVENTION In view of such circumstances, an object of the present invention is to provide an article gripper having a simple structure and a large gripping force.

[0004]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a reciprocating drive means and the other end of each of a pair of front hinge arms pivotally attached to a front end of a frame body. A pair of grip arms that are rotatably supported with respect to the other ends of the pair of rear hinge arms pivotally attached to the slide body that reciprocally slides with respect to the frame body. A front engagement member that engages and disengages with a rotation prevention engagement portion formed by both of the front hinge arms, and a rotation prevention body formed by both of the rear hinge arms. A rear engaging member that engages and disengages with the engaging portion is disposed, and both engaging members are engaged and disengageable with respect to the engaging portions.

[0005]

By the interchangeable engagement and disengagement action of the front engagement member and the rear engagement member, the position of the fulcrum with respect to the grip arm is moved, and when the rear engagement member is engaged, the expanding operation is mainly performed, Since the gripping operation is mainly performed when the engaging members are engaged, the function as a gripper is excellent. Moreover, as the drive means, a simple reciprocating drive means such as a lightweight air cylinder can be used.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing an embodiment of the present invention, and FIG. 2 is a sectional view showing the main part thereof. In the figure, 1 is a frame main body, and a slit 2 is formed in the central portion. In this slit 2, an operating rod 4 of a reciprocating driving means 3 such as an air cylinder is provided.
A slide body 5 that slides back and forth through is fitted.
As shown in FIG. 2, a front engaging member 6 is incorporated in the slide body 5 in a state in which it can be moved forward and backward by being biased forward by a spring 7. Similarly, the rear engagement member 8 is installed in a state in which it can be moved forward and backward by being biased forward by the spring 9. Reference numeral 10 is a stopper pin for the front engaging member, and 11 is a stopper plate for the rear engaging member. A pair of front hinge arms 12 and 13 are rotatably attached to the tip of the frame body 1, while a pair of rear hinge arms 14 and 15 are rotatably attached to the slide body 5. Is pivotally attached to. further,
One grip arm 16 is pivotally attached to the other ends of the hinge arms 12 and 14 so as to be rotatable. Also,
Similarly, the other grip arm 17 is rotatably attached to the other end of each of the hinge arms 13 and 15. Grip members 18 and 19 are provided at the tips of these grip arms 16 and 17, respectively, and the article 2
Hold 0. The front hinge arms 12 and 13 are
An engaging concave portion 21 that constitutes an engaging portion that works in cooperation with each other is formed in a portion facing the front engaging member 6, and by engaging the front engaging member 6 with the concave portion 21. , The hinge arms 12 and 13 are prevented from rotating and fixed.
Similarly, an engaging concave portion 22 that constitutes an engaging portion that functions in cooperation with both of the rear hinge arms 14 and 15 is formed at a portion of the rear hinge arm 14 facing the rear engaging member 8. The engagement of the engagement member 8 prevents both hinge arms 14 and 15 from rotating and fixes them.

FIG. 3 is a plan view showing a process of operation of the article gripper. In the figure, state (a) shows a state in which the slide body 5 is retracted and the grip arms 16 and 17 are expanded. At this point, the rear engagement member 8
Engage with the engaging recess 22 and the front engaging member 6 is separated from the engaging recess 21.
As the slide body 5 moves forward, 6 and 17 rotate about the pivotally attached portions 23 and 24 with the rear hinge arms 14 and 15 as fulcrums. In the state (b), the slide body 5 further advances,
The timing at which the rear engagement member 8 contacts the stopper plate 11 to release the engagement, and the front engagement member 6 exchangeably engages with the engagement recess 21 of the front hinge arms 12 and 13 is shown. And the grip members 18, 1
9 is in a state of approaching the article 20. At this timing, the fulcrum of the grip arms 16 and 17 is the pivot point 2
Pivot part 2 from 3 and 24 to front hinge arms 12 and 13
Move to 5, 26. The state (c) shows a state in which the slide body 5 is further advanced to grip the article 20. In this state, the front engaging member 6 is still biased forward by the spring 7 and still maintains the engaged state with the engaging recess 21. On the other hand, the rear engagement member 8 contacts the stopper plate 11 and remains in the released state. Therefore, since the grip arms 16 and 17 are rotated by the rear hinge arms 14 and 15 with the pivotally attached portions 25 and 26 as fulcrums, a large gripping force is applied. Note that the release operation of the article 20 follows the reverse order described above, but in this case, the stopper pin 10 now has the function of releasing the front engagement member 6. In the above embodiments, the hinge arm side is formed as a concave shape as the engaging means for preventing the rotation of the hinge arm, but the hinge arm side may be changed to a convex shape. There is no end.

[0008]

According to the present invention, the following effects can be obtained based on the above constitution. (1) The position of the fulcrum with respect to the grip arm is moved by the interchangeable engagement and disengagement action of the front engagement member and the rear engagement member, and the expanding operation is mainly performed when the rear engagement member in the retracted position is engaged. , With a larger opening,
Since the gripping force becomes large when the front engaging member in the forward position is engaged, the function as a gripper is extremely good. (2) Moreover, as the driving means, a simple reciprocating driving means such as a lightweight air cylinder can be used.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing a main part of the embodiment.

FIG. 3 is a plan view showing the progress of the operation of the embodiment.

[Explanation of symbols]

1 ... frame body 2 ... slit 3 ... reciprocating driving means 4 ... operating rod 5 ... slide body 6 ... front engaging member 7 ... spring 8 ... rear engaging member 9 ... spring 10 ... Stopper pin 11 Stopper plate 12, 13 Front hinge arm 14, 15 Rear hinge arm 16, 17 Grip arm 18, 19 Grip member 20 Article 21, 22 Engagement recess 23 ~ 26 ...

Claims (1)

[Claims] 1. A pair of front hinge arms rotatably pivotally attached to the tip of the frame main body, and the other end of each of the front hinge arms and a slide body that slides back and forth with respect to the frame main body by a reciprocating drive means. A pair of grip arms rotatably supported with respect to the other ends of the pair of rear hinge arms movably pivoted, and formed on the slide body by both of the front hinge arms A front engaging member that engages and disengages with the rotation preventing engagement portion and a rear engaging member that engages and disengages with the rotation preventing engagement portion formed by both of the rear hinge arms. Then, the article gripper, wherein both of these engaging members are exchangeably engaged with and disengaged from the respective engaging portions.