JPH0683981B2 - Chuck device - Google Patents

Description

The present invention relates to a chuck device for gripping a hollow article from the inside.

(Prior Art) Generally, when a hollow article made of synthetic resin, synthetic rubber or the like having different inner diameters depending on the type is to be transshipped to a predetermined position with the axis center vertical, Attaches a plurality of fluid cylinders in a horizontal state to an arm that grips and reloads articles or moves vertically and horizontally, and attach a member that presses the inner peripheral surface of the article to the piston rod of the cylinders. The chuck device installed is being used.

(Problem) In the transshipment operation of the articles described above, in the former case, the transshipment work can be performed without any trouble even when the inner diameter dimensions of the articles are different, but when the transshipment is large and the interval is short, or However, if the article is heavy, there is a physical limit, and it is not possible to cope with speeding up and continuation.In the latter case, if the inner diameter dimension difference is as large as 150 mm to 600 mm, one chuck device However, there is a problem that the article cannot be gripped and a plurality of chuck devices must be prepared.

(Object) It is an object of the present invention to provide a chuck device having a simple structure, a small size, and capable of reliably gripping a soft hollow article having a large dimensional difference.

(Means for Solving the Problem) In order to solve the above-mentioned problems, a chuck device of the present invention is configured such that a sliding member is movably mounted on each of a plurality of support arms radially provided in a radial direction. , An arm having a supporting member is rotatably mounted on the sliding member, and when the sliding member is moved in the horizontal direction, the arm rotates and the supporting member abuts on the inner peripheral surface of the article and grips it. In addition, the sliding member is engaged with a guide member formed on the supporting arm to be moved by a fluid cylinder, and the arm includes a pinion integrally formed on the arm. The pinion is configured to engage with a rack formed on the support arm, and the pinion rolls on the rack by the movement of the sliding member so that the pinion can be rotated.

(Example) The structure of one example of the chuck device of the present invention will be described with reference to the drawings.

Reference numeral 1 is a machine base (not shown) or a pillar installed vertically to the carriage, and the bracket 2 is mounted so as to move vertically and rotate horizontally. The bracket 2 is moved up and down by a fluid cylinder 3 and is rotated about the column 1 by a fluid cylinder (not shown) or a rotating mechanism such as an electric motor and a rack and pinion. Reference numeral 4 denotes a support arm that is integrally attached to the end of the bracket 2 and has a shape in which four horizontal arms radially protrude. A guide member 5 having a circular or rectangular cross section is attached to the support arm 4 in parallel with each other. As shown in FIG. 3, reference numeral 6 denotes a sliding member movably attached to the guide rod 5, and the pinion 7 and the arm 8 are attached so as to rotate integrally. The pinion 7 meshes with a rack 9 integrally attached to the support arm 4. A fluid cylinder 10 is attached to the support arm 4 so as to be located above the guide member 5, and a piston rod is connected to the sliding member 6.

Therefore, as shown in FIG. 2 and FIG. 3, when the piston rod projects and the sliding member 6 moves in the direction (a), the pinion 7 and the arm 8 move to the position (c) as shown in FIG.
When the piston rod retracts and the sliding member 6 moves in the (b) direction, the pinion 7 and the arm 8 rotate in the (d) direction.

Reference numeral 11 denotes a support member which is vertically attached to the end of the arm 8 and, as shown in FIG.
A cylindrical body 14 made of metal or synthetic resin is rotatably attached by 13. Further, when gripping an elastic article such as synthetic rubber, the peripheral surface of the cylindrical body 14 is knurled. The above-mentioned cylinder 14 can be directly attached to the shaft 12.

A pressure fluid supply pipe (not shown) having a supply passage switching valve is connected to the fluid cylinder 10 described above.

When performing the transshipment operation of the hollow articles by the above-mentioned chuck device, the operation sequence, the operation interval, the raising and lowering of the bracket 2, the rotating position, etc. are set in advance in the control device (not shown) and input. Then, when a predetermined article 20 is prepared in a processing device (not shown) or a supply conveyor, and a control device (not shown) is started, the pressure fluid supply path is switched to the fluid cylinder 3. Pressure fluid is supplied,
The piston rod projects to support the bracket 2 and the supporting arm 4
Will rise to a predetermined position. Next, when a rotation mechanism (not shown) is activated to rotate the support arm 4 together with the bracket 2 to the grip position of the article 20, the pressure fluid supply path to the fluid cylinder 3 is switched and the piston rod is moved. The support arm 4 moves down together with the retractable bracket 2. Then, when the support member 11 reaches the gripping position of the article 20, as shown in FIGS. 2 and 3, the pressure fluid supply passage to the fluid cylinder 10 is switched and the piston rod is projected so that the sliding member 6 Move in the (a) direction. Then, the pinion 7 rolls on the rack 9 to rotate the arm 8 in the (c) direction, and the cylindrical body 14 of the support member 11 abuts and grips the inner peripheral surface of the article 20. Then, the pressure fluid supply path to the fluid cylinder 3 is switched and the piston rod projects to raise the support arm 4 together with the bracket 2. Then, when the article 20 is lifted to a predetermined position, a rotation mechanism (not shown) is activated to rotate the bracket 2 to move the article 20 to an upper portion of a conveyor (not shown) or the like.
To transport. Then, the pressure fluid supply path to the fluid cylinder 3 is switched, the piston rod is retracted, the support arm 4 is lowered together with the bracket 2, and the article 20 is lowered onto the conveyor (not shown). The fluid supply path is switched, the piston rod retracts, and the sliding member 6
Move in the (b) direction. Then, the pinion 7 meshing with the rack 9 rolls to move together with the arm 8 to the supporting member 11
Is rotated in the (d) direction to separate the cylindrical body 14 from the inner peripheral surface of the article 20 and release the grip. Then, the pressure fluid supply path to the fluid cylinder 3 is switched, the piston rod ascends the bracket 2 and the support arm 4 to a predetermined position, and the transshipment operation of the articles 20 is completed.

The chuck device described above can also be attached to the arm of a robot or the like that moves in the vertical direction, the front-back direction, and the left-right direction.

(Advantages of the Invention) In the chuck device of the present invention, a sliding member is movably mounted on each of a plurality of supporting arms radially provided in the horizontal direction, and an arm having the supporting member is rotated around the sliding member. The sliding member is movably mounted, and when the sliding member is moved in the horizontal direction, the arm is rotated so that the supporting member abuts and grips the inner peripheral surface of the article.
The guide member formed on the support arm is engaged with the guide member so as to be moved by a fluid cylinder, and the arm is engaged with a pinion integrally formed on the arm with a rack formed on the support arm. Since the pinion is configured to rotate by rolling on the rack by the movement of the sliding member, the gripping roller at the tip of the arm is moved by moving the pivot fulcrum of the arm in the diameter direction of the article. The amount of movement in the diametrical direction of the article becomes large, the range of diametrical dimensions of the article that can be gripped can be widened, and a soft article with a large amount of deformation made of synthetic resin, synthetic rubber, etc. can be reliably secured. Can be gripped.

[Brief description of drawings]

FIG. 1 is a schematic front view showing an embodiment of a chuck device of the present invention. FIG. 2 is a view taken along the line ZZ in FIG. FIG. 3 is an enlarged schematic view of a Y portion in FIG. FIG. 4 is a schematic side view of FIG. 1: Pillar, 2: Bracket, 3, 10: Fluid cylinder, 4: Support arm, 5: Guide member, 6: Sliding member, 7: Pinion, 8: Arm, 9: Rack, 11: Support member, 12: Shaft, 13: Bearing, 14: Cylindrical,

Claims (1)

[Claims] 1. A sliding member is movably mounted on each of a plurality of supporting arms radially protruding in a horizontal direction, and an arm having a supporting member is rotatably mounted on the sliding member. When the sliding member is moved in the horizontal direction, the arm rotates so that the supporting member comes into contact with and grips the inner peripheral surface of the article, and the sliding member is guided by the guide formed on the supporting arm. The arm is engaged with a member to be moved by a fluid cylinder, the pinion formed integrally with the arm is meshed with a rack formed on the support arm, and the pinion is formed by the movement of the sliding member. A chuck device, wherein the chuck device is adapted to be rotated by rolling on a rack.