JPH077109Y2 - Chuck device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a chuck device, and more particularly to an improvement of a chuck device having a pair of claws for holding an article.

(Prior Art) Conventionally, as this type of chuck device, a left-right interlocking type chuck device as shown in FIG. 3 and a one-side opening / closing type chuck device as shown in FIG. 4 are known. Further, in JP-A-62-28190, an opening / closing system in which one moves forward and backward and the other swings in conjunction with the forward and backward movement as shown in FIG. 5 (hereinafter referred to as forward-backward-swing interlocking system). Is disclosed.

Among them, in the left-right interlocking type shown in FIG. 3, left and right claws 4 and 5 are provided at the left and right ends of a chuck body 2 mounted on a shaft 1 which can be raised and lowered and rotated, via rods 3 which extend and contract. Therefore, the rod 3 is contracted and moved in the direction indicated by the arrow in the figure so that the left and right claws 4 and 5 grip the component 6.

The one-sided opening and closing type shown in FIG. 4 has a fixed claw 7 provided at one end 2a of the chuck body 2 and a movable claw 8 movable forward and backward relative to the fixed claw 7 at the other end. Moving claw 8
Is moved toward the fixed claw 7 as indicated by an arrow in the figure, so that the component 6 is gripped. The chuck device of the advancing / retreating-swinging interlocking system disclosed in Japanese Patent Laid-Open No. 62-28190 shown in FIG. 5 includes a swinging pawl 52 pivotally mounted on a chuck body 50 by a support shaft 51, and a chuck. A forward / backward moving claw 58 that is fixed to a slider 57 that is vertically moved by vertically moving a cam roller 55 that is sandwiched by a guide block 53 of the main body 50 and arranged at the lower end of a rod 54 and that is vertically movable back and forth 58 And swings against the elastic force of the spring 59 urged via the roller 60 of the contact member attached to the slider 57 so as to interlock with the forward / backward movement of the forward / backward movement claw 58. The claw 52 swings and grips the articles G of various sizes.

(Problems to be solved by the invention) However, in the left-right interlocking type chuck device shown in FIG. 3, although it is possible to handle the parts 6 having different lengths within the stroke range of the left and right claws 4 and 5, Since the center of No. 6 is used as a reference, there is a problem that the conveyor also has to be used as a center reference in the process of processing the parts 6 before and after the chuck device.

Further, in the one-sided opening / closing type chuck device shown in FIG. 4, it is advantageous as compared with the double-sided moving type in order to respond to the change in the length of the component 6 with one side as a reference. When lowering the chuck device, it is necessary to provide a clearance C between the fixed claw 7 and the component 6, and at the time of gripping the component 6, the clearance C is equal to the clearance C.
Will be moved by the moving claw 8.

Therefore, if the component 6 is a component such as an IC, the external connection terminal may be inadvertently bent and the commercial value may be impaired.

In order to solve this problem, it is conceivable to move the fixed claw 7 until it comes into contact with the end of the component when the chuck descends to eliminate the clearance C and then grasp the component 6, but this method requires a complicated mechanism. There was a problem that In the advancing / retreating single swing interlocking type chuck device shown in FIG. 5, the swingable swinging pawl 52 is merely urged by the spring 59 in the closing direction, and the linear movement of the advancing / retreating pawl 58 in the opening direction. Movement causes the spring 59 to oscillate in the opening direction against the resilience of the spring 59, and the forward / backward moving claw 58 moves linearly in the closing direction to cause the spring.
Only the mechanism that swings in the closing direction by the restoring force of 59 swings the swinging claw 52 until it abuts according to the size of the article G, and the gripping state should be called gripping. .

Therefore, when the article G to be grasped is smaller than a predetermined size, the abutting surface 61 of the swinging claw 52 which contacts the article G is grasped in a further swung state from the state in which the contact surface 61 contacts the chuck body 50 at a right angle. When G is larger than a predetermined size, the contact surface 61 of the swinging claw 52 which contacts the article G is the chuck body 50.
It will be clamped in a slightly open state before it becomes a right angle to. That is, the chuck body of the contact surface 61 of the swinging pawl 52
The angle to 50 is not constant.

In this respect, in particular, for a rectangular parallelepiped-shaped article (for example, an electronic component such as an IC), it is necessary to prevent the article from being damaged by abutting parallel to the chuck body 50 with a right-angled claw so that the article is not damaged. Desirable in the sense of doing
The above-mentioned chuck mechanism has a problem in that it is effective as a chuck device for a tube component, but is not suitable as a chuck device for an electronic component having an external connection terminal.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a chuck device capable of reliably gripping a component with a simple mechanism.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a first claw pivotably mounted on one end of a chuck body and a first claw on the other end. A second pawl capable of moving forward and backward, and a mechanism for swinging against the elastic force of the first pawl, which is interlocked with the forward and backward movement of the second pawl. In the chuck device, the chuck main body is mounted on a shaft that is linearly and rotationally movable, and the first claw resists elastic force as the second claw moves closer to the first claw direction. A chuck that moves in the direction of the holding side until it becomes a right angle with respect to the chuck body, and abuts in parallel with the component by the second claw that moves closer to the first claw that has the right angle and grips the component. It is a structure.

In the present invention, the transmission means may be any one as long as it swings the first pawl as the second pawl moves forward and backward. For example, the drive cam portion and the first pawl provided on the second pawl may be used.
The cam mechanism may include a driven portion provided on the claw.

Further, as another structure of the transmission means, in addition to the link mechanism, the rack and the pinion, etc., for example, magnet members of the same polarity that repel each other on the first and second claws can be used.

(Operation) With the above configuration, when the second claw is moved toward the first claw after the chuck is lowered and / or rotationally moved to the part where the component is placed, the transmission means is activated. Then, the first claw swings on the gripping side until it becomes a right angle with respect to the chuck body, and the first claw and the second claw cooperate to grip the component in parallel.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a perspective view of a chuck device 9 of the present invention.

The chuck device 9 of this embodiment includes a block-shaped chuck body 12 mounted on a shaft 10 which can be linearly and rotationally moved.
And a swingable first claw 16 of which one end is pivotally attached to one end of the chuck body 12 with a pivot pin 14, and the other end of the chuck body 12 is movable toward and away from the first claw 16. The second claw 18 disposed in the first claw 16 is interposed between the first claw 16 and the second claw 18, and the forward / backward movement of the second claw 18 is converted into the swing of the first claw 16. The transmission means 20 and the main part are configured.

The first claw 16 is swingably pivotally mounted by a pivot pin 14 mounted on a pair of brackets 22a, 22b mounted on both sides of one end of the chuck body 12, and is projectingly provided on an end surface of the chuck body 12. Spring receiving bracket 24 and first pawl 16
An elastic force is always urged in the opening direction, that is, in the direction opposite to the grip of the component A, by the restoring spring 28 that is stretched on the spring receiving bracket 26 that projects from the outer surface of the component A.

The second claw 18 includes a slide plate 32 guided along a slide guide 30 attached to the side of the chuck body 12,
A plate-like claw piece vertically protruding from the lower surface of the slide plate 32.
34, and the slide plate 32 can be moved back and forth with respect to the first pawl 16 by a driving means such as a cylinder (not shown).

The transmission means 20 is provided on the side of the slide plate 32 of the second pawl 18, and has a driving cam portion 38 having a cam surface 36 having a downward slope toward the first pawl 16 and the driving cam portion. And a bearing 40 that is a driven portion that engages with the cam surface 36 of 38.

The bearing 40 is rotatably attached to the other end of the operating arm 42, one end of which is fixed to the pivot pin 14, with the pin 44, and is constantly driven by the resilient force of the restoring spring 28.
The cam surface 36 of 38 is configured to be in contact with and engaged with.

Next, an operation mode of the chuck device 9 according to the present embodiment configured as described above will be described with reference to FIGS. 2 (a) to (c).

First, as shown in FIG. 2A, the shaft 10 is lowered and rotated to move the chuck body 12 onto the table B on which the component A is placed.

Next, as shown in FIG. 2B, the slide plate 32 is moved to move the second pawl 18 close to the first pawl 16, thereby contacting the cam surface 36 of the drive cam portion 38. Bearing 40
Rises along the cam surface 36 and the operating arm 42 rotates upward, and with the rotation of the operating arm 42, the first claw 16 rotates in the gripping side direction against the elastic force of the restoring spring 28. Will be done.

The rotation of the first claw 16 is stopped when the bearing 40 reaches the top of the cam surface 36, and the first claw 16 comes into contact with the part A at a right angle to the chuck body 12.

Further, when the second claw 18 is moved, as shown in FIG. 2 (c), the second claw 18 is further moved while the first claw 16 is in a state of being perpendicular to the chuck body 12. When they move close to each other, the contact surfaces of both claws contact the component A in parallel and are gripped.

Therefore, from the stroke range of the second pawl 18 to the first pawl
It is possible to cope with the length of the part A within a range excluding 16 rotation strokes.

Further, in order to release the gripped state of the component A, the reverse operation of the above-described gripping operation may be performed, and at this time, the first claw 16 is restored to the initial position by the elastic force of the restoring spring 28. Become.

(Effect of the Invention) As described above, since the chuck device of the present invention is configured as described above, the following effects can be obtained.

The first claw is rotationally displaced until it becomes a right angle with respect to the chuck body, the second claw is further linearly displaced, and cooperates with the first claw to abut the contact surface parallel to the component. Therefore, there is an excellent effect that the parts can be securely gripped without being moved and without being damaged.

Since the first claw is opened / closed by the forward / backward movement of the second claw, the component can be gripped by a simple mechanism, and further, the change in the length of the component can be coped with, which is an excellent effect.

[Brief description of drawings]

FIG. 1 is a perspective view of a chuck device of the present invention, FIGS. 2 (a) to (c) are side views showing an operation mode of the chuck device of the present invention, and FIG. 3 is a conventional left-right interlocking type chuck device. FIG. 4 is a side view of a conventional one-sided opening / closing type chuck device. FIG. 5 is a side view of a conventional chuck device of an advance / retreat single swing interlocking type. 9 …… Chuck device, 10 …… Axis, 12 …… Chuck body,
16 ... First claw, 18 ... Second claw, 20 ... Transmission means.

Claims (1)

[Scope of utility model registration request] 1. A first pawl pivotally attached to one end of a chuck body so as to be swingable, and a second pawl capable of advancing and retracting toward the first pawl at the other end. With the second
In a chuck device equipped with a mechanism that swings against the elastic force of the first claw urged in conjunction with the forward / backward movement of the claw of the claw, the chuck body is mounted on a shaft that can be linearly and rotationally moved. At the same time, as the second claw moves closer to the first claw, the first claw swings against the elastic force in the gripping direction until it becomes a right angle with respect to the chuck body. A chuck device characterized in that the first claw having a right-angled shape and the second claw that moves closer to each other are brought into parallel contact with a component to grip the component.