JP4197370B2 - Chucking mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chucking mechanism, and in particular, a pair of Y-axis direction slide tables and one ball bearing are provided on an X-axis direction slide table, and a positioning portion of each Y-axis direction slide table is moved forward by the X-axis direction slide table. The present invention relates to a novel improvement for achieving positioning and holding with respect to an object to be chucked only by a configuration of a machine element.
[0002]
[Prior art]
Conventionally, as this kind of chucking mechanism, for example, the configuration shown in FIGS. 4 and 5 has been adopted. That is, what is indicated by reference numeral 1 in FIGS. 4 and 5 is an X-axis direction slide table provided on the base 2 so as to be linearly movable in the X-axis direction. The X-axis direction slide table 1 is an X-axis motor. 3 is configured to move linearly through an X-axis nut tube 4 that is converted into a linear motion by 3.
On the X-axis direction slide table 1, a pair of Y-axis direction slide tables 5, 6 that slide along a Y-axis direction Y orthogonal to the X-axis direction X are provided so as to be able to contact and separate from each other. Each Y-axis direction slide table 5, 6 is constituted by each Y-axis motor 8, 9 via a Y-axis nut tube 7 in the same manner as the above-described X-axis direction slide table 1.
Accordingly, the Y-axis motors 8 and 9 are rotated in the reverse direction to move the Y-axis direction slide tables 5 and 6 away from each other to make the chuck open, and then the X-axis motor 3 is rotated forward to rotate in the X-axis direction. When the slide table 1 is moved forward and a chucked object (not shown) is positioned between the Y-axis direction slide tables 5 and 6, the Y-axis direction slide tables 5 and 6 are moved toward each other. A chucked object (not shown), which is a workpiece, is chucked by chuck pieces (not shown) provided on the direction slide tables 5 and 6.
[0003]
[Problems to be solved by the invention]
Since the conventional chucking mechanism is configured as described above, the following problems exist. That is, since an X-axis motor for moving the X-axis direction slide table is required and a pair of Y-axis motors for moving the Y-axis direction slide table are required, the sensors that control the operation of each of these motors In addition, a control means is required, and the electrical and mechanical configuration is complicated.
[0004]
The present invention has been made to solve the above-described problems. In particular, the X-axis direction slide table is provided with a pair of Y-axis direction slide tables and one ball bearing, and the X-axis direction slide table advances. An object of the present invention is to provide a chucking mechanism in which the positioning portion of each Y-axis direction slide table is brought into contact with the object to be chucked to achieve positioning and holding with respect to the object to be chucked only by the configuration of the machine elements.
[0005]
[Means for Solving the Problems]
The chucking mechanism according to the present invention includes an X-axis direction slide table provided on a mounting body so as to be movable along the X-axis direction, a ball bearing provided on a bracket above the X-axis direction slide table, and the X-axis A pair of Y-axis direction slide tables provided on the direction slide table and movably provided along the Y-axis direction orthogonal to the X-axis direction, and the ball bearings formed at the tips of the Y-axis direction slide tables Between the Y-axis direction slide table and the cam surface that is in sliding contact with the Y-axis direction slide table, a positioning portion that is formed at the tip of each Y-axis direction slide table and chucks the chucked portion of the peripheral wall of the chucked object. A tension spring, and the X-axis direction slide table is moved forward so that the positioning portions come into contact with the peripheral wall of the chucked object. By serial ball bearings away from the cam surface, wherein the positioning portion is configured to engage the chucked portion is expanded.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of a chucking mechanism according to the present invention will be described with reference to the drawings. Note that the same reference numerals are used for the same or equivalent parts as in the conventional example.
In FIG. 1 to FIG. 3, what is indicated by reference numeral 1 is an X-axis direction slide table slidably provided on a slide holder 3 provided on the mounting body 2, and this X-axis direction slide table 1 is the X-axis direction. It is configured to reciprocate along X as indicated by solid and dotted lines.
[0007]
A ball bearing 13 is provided on a bearing mounting plate 11 provided at an upper position of the mounting body 2 via a bracket 10 so as to be freely rotatable via a bearing shaft 12. On the X-axis direction slide table 1, a pair of Y-axis direction slide tables 5 and 6 are provided so as to be openable and closable along the Y-axis direction Y as shown in FIGS.
[0008]
Cam surfaces 5a and 6a having a shape in which corner portions are notched are formed at the outer positions of the Y-axis direction slide tables 5 and 6 facing each other, and the tips of the Y-axis direction slide tables 5 and 6 are formed. Are provided with positioning portions 5A and 6A extending outward from each other.
[0009]
At the rear ends of the Y-axis direction slide tables 5, 6, tongue-like connection pieces 5b, 6b are integrally formed, and a tension spring 20 is stretched between the connection pieces 5b, 6b. As a result, the Y-axis direction slide tables 5 and 6 are held in a state where the ball bearings 13 are sandwiched.
[0010]
Next, the operation will be described. First, when the X-axis direction slide table 1 is advanced along the solid line in the X-axis direction X by a driving means (not shown) in the state of FIG. 3, the front portion 1a of the X-axis direction slide table 1 has a cylindrical shape. The positioning portions 5A and 6A are in sliding contact with the peripheral wall 21a while being in contact with the peripheral wall 21a of the object 21. If the X-axis direction slide table 1 is continuously advanced in this state, as shown in FIG. 2, the front portion 1a completely contacts the peripheral wall 21a and the Y-axis direction slide tables 5, 6 Since the ball bearings 13 are separated from the cam surfaces 5a and 6a and are in sliding contact with the linear portions 5aA and 6aA, the Y-axis direction slide tables 5 and 6 expand against the tension of the tension spring 20 and are positioned. The parts 5A and 6A engage with the chucked parts 21A and 21B of the chucked object 21, and the chucking and holding operations are completed.
[0011]
After the above chucking state is completed, the mounting body 1 is moved, the chucked object 21 is transferred to another place, and then the X-axis direction slide table 1 is retracted. As shown in FIGS. 13 and the linear portions 5aA, 6aA are released from sliding contact with the cam surfaces 5a, 6a, so that the Y-axis direction slide tables 5, 6 return to their original positions, and the positioning portions 5A, 6A The engagement with each chucked portion 21A, 21B is released.
[0012]
【The invention's effect】
Since the chucking mechanism according to the present invention is configured as described above, the following effects can be obtained. That is, only by moving the X-axis direction slide table forward and backward, the pair of Y-axis direction slide tables having the chucking positioning portion can be opened and closed, and the chucking operation can be performed with only mechanical elements.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional view showing a chucking mechanism according to the present invention.
FIG. 2 is a plan view of the chuck opening of FIG.
FIG. 3 is a plan view of the chuck closed in FIG. 1;
FIG. 4 is a plan sectional view showing a conventional chucking mechanism.
5 is a side cross-sectional view of the main part of FIG. 4. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 X-axis direction slide table 2 Attachment body 5,6 Y-axis direction slide table 5a, 6a Cam surface 5A, 6A Positioning part 13 Ball bearing 20 Tension spring 21 Chucked object 21a Perimeter wall 21A Chucked part

Claims (1)

An X-axis direction slide table (1) provided on the attachment body (2) so as to be movable along the X-axis direction (X), and a bracket (10) above the X-axis direction slide table (1). Ball bearing (13) and a pair of Y-axis directions provided on the X-axis direction slide table (1) and movably along the Y-axis direction (Y) perpendicular to the X-axis direction (X) Slide table (5, 6), cam surface (5a, 6a) formed at the tip of each Y-axis direction slide table (5, 6) and in sliding contact with ball bearing (13), and each Y-axis direction slide Positioning portions (5A, 6A) formed at the tip of the table (5, 6) for chucking to the chucked portion (21A) of the peripheral wall (21a) of the chucked object (21), and the respective Y-axis direction slides A tension spring (20) provided between the tables (5, 6), and the X-axis direction slide table (1) is moved forward so that the positioning portions (5A, 6A) When the ball bearing (13) is separated from the cam surface (5a, 6a) after contacting the peripheral wall (21a) of the chucked object (21), the positioning portions (5A, 6A) are expanded. A chucking mechanism characterized by being configured to engage with the chucked portion (21A).

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