JP2005271163A - Chuck device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chuck device, simply freely mounting and demounting a chuck claw means in a single structure, simplifying the contents of works to shorten the replacement work time, and improving throughput and production efficiency. <P>SOLUTION: In this chuck device, two or more chuck claw means 3 holding a workpiece in a movable member 2 moved in the radial direction are removably mounted in the chuck device body 1. In the chuck claw means 3, a bolt hole penetrating from each one side of an abutting surface 3a abutting in holding the workpiece and a surface orthogonal to the abutting surface 3a to the other sides is bored like an elongated shape so that a bolt 6 is relatively horizontally moved in the erected state to form a connecting elongated hole 4. One side of the connecting elongated hole 4 is a large-diameter insert hole 4a allowing the head 6a of the bolt 6 to pass therethrough, and second side of the connecting elongated hole 4 is a stepped hole 5 so that a flange part 6b of the head 6a of the bolt 6 is caught by a step part 5a. On the stepped hole 5 side, the hole is connected and fixed to the movable member 2 through a connecting intermediate member 11 and the bolt 6 so that the chuck claw means can be freely attached to and detached from the chuck device body 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a chuck device used for a machine tool such as a lathe.

  For example, in machine tools such as lathes and NC lathes that are commonly used, a chuck device is provided for gripping and fixing the workpiece via a movable member having a tightening adjustment function with respect to the spindle, and the workpiece is gripped by the claw portion. Then, it is customary to perform machining by rotating together with the main shaft.

  Usually, the number of claw parts for gripping the workpiece is often 3 or 4, and it is classified into interlocking type or single action type according to the driving method of the claw part, and the three claw scroll chuck and the four claw single action chuck. Etc.

  The three-jaw scroll chuck is generally used when fixing a workpiece having a gripped portion intended for a cylindrical shape.

Also, as a lathe chuck device that has a large workpiece clamping force, has an easy-to-manufacture and inexpensive chuck claw, is not easily restricted by the workpiece diameter, and can clamp a workpiece with a large diameter regardless of the chuck diameter, “The chuck claw has a parent claw having a V-shaped groove with a V-shaped contact surface on the workpiece clamping side and a workpiece clamping surface on the workpiece clamping side, and the parent claw V on the non-clamping side. It has a child claw having a chevron that fits into the groove and a connecting bolt for fixing the child claw to the parent claw, and the connecting bolt is removed from the insertion hole that opens from the outer surface of the parent claw to the contact surface. A gazette is disclosed, which is characterized in that the child claw is fixed to the parent claw by being inserted from the side surface and screwed into the chevron protrusion of the child claw (see, for example, Patent Document 1).
JP 2000-326117 A

  However, in the above-described conventional example, for example, after chucking the workpiece (work), the holding state is set via a movable member having a tightening adjustment function by hydraulic pressure or fluid pressure driving such as pneumatic pressure or manual operation. A firm system is generally used, but when replacing the claw, it is essential to tighten or loosen a specified number of bolts (at least 6 with a 3 claw chuck). In addition, there is a problem that the time loss is large in work that needs frequent replacement, such as setup work for processing the next workpiece.

  Moreover, in the example of patent document 1, it is necessary to fix a child nail with respect to a parent nail with two connection bolts, and a subject remains in terms of workability.

  The present invention has been made paying attention to the above-mentioned points, and has a single structure comprising a claw portion that holds and holds the chuck claw means in contact with the workpiece, and can be attached to and detached from the movable member of the chuck device body with one touch. It is an object of the present invention to provide a chuck device for use in a machine tool that can be configured to simplify work contents in the setup process, shorten the replacement work time, and improve production efficiency as well as processing capacity.

  This invention can solve the said subject by providing the following structure.

  (1) A chuck device in which a plurality of chuck claw means for gripping the workpiece is detachably mounted on a movable member that is movable in the radial direction within the chuck device body in accordance with the size of the workpiece, The chuck claw means can move in a relatively horizontal direction with the bolt standing up through the bolt hole penetrating from one side to the other side of the contact surface that is in contact with the workpiece when gripping the workpiece. Drilled into a hole shape to make a long hole for connection, one side of the long hole for connection is a large-diameter insertion hole with a large diameter through which the head of the bolt can pass, and the two sides of the long hole for connection are the jaws of the head of the bolt The step is a stepped hole that is hooked at the stepped portion, and the movable member, a rectangular block piece that can be connected and fixed via a connecting intermediate member and a bolt are formed on the stepped hole side, and the chuck is formed via the movable member. Chuck equipped with a removable structure to the main unit .

  (2) The connecting elongated hole penetrating through the two opposing surfaces of the chuck claw means forming the square block piece is formed when the axis of the stepped hole is mounted on the movable member with the chuck claw means. A long hole shaft center line connecting the shaft center of the stepped hole and the shaft center of the large diameter insertion hole on the moving shaft of the movable member maintains a predetermined inclination angle with respect to the moving shaft of the movable member. The chuck device according to item (1), wherein the chucking device is configured such that at least two of the connecting elongated holes are arranged in parallel at a predetermined distance.

  (3) The chuck according to the above item (2), wherein the inclination angle can be set in a range of 360 ° of the long axis of the connecting long hole with respect to the moving axis serving as the axis of the movable member. apparatus.

  According to the present invention, the work structure in the setup process is simplified by adopting a structure in which the chuck claw means comes into contact with and grips the workpiece and has a single structure that can be attached to and detached from the movable member of the chuck device body with one touch. Therefore, it is possible to provide a chuck device for use in a machine tool that can shorten the replacement work time and improve the processing efficiency and the production efficiency.

  Hereinafter, embodiments of the chuck device according to the present invention will be described.

  FIG. 1 is an explanatory view showing an example of an embodiment of a chuck device according to the present invention, where (a) is a plan view, (b) is a front view, (c) is a side view, (d) is a perspective view, 2A and 2B are explanatory views showing an example of a state in which the chuck claw means is mounted on the chuck device main body, wherein FIG. 2A is a front view, and FIG. 2B is a cross-sectional view taken along the line AA. 3 (a) and 3 (b) are explanatory diagrams of the first embodiment, FIGS. 4 (a) and 4 (b) are explanatory diagrams of the second embodiment, and FIG. FIGS. 7A and 6B are explanatory diagrams of the third embodiment, FIGS. 6A and 6B are explanatory diagrams of the fourth embodiment, and FIGS. 7A and 7B are explanatory diagrams of the fifth embodiment. It is.

  Hereinafter, embodiments will be described with reference to the drawings.

  A chuck in which a plurality of chuck claw means 3 for gripping a workpiece are detachably mounted on a movable member 2 movable in the radial direction of the main shaft in the chuck device body 1 in accordance with the size of the workpiece to be processed. In the apparatus, the chuck claw means 3 is a state in which the bolt 6 stands up through a contact surface 3a that contacts when gripping a workpiece and a bolt hole that penetrates from one side of the surface orthogonal to the contact surface 3a to the other side. Are formed in a long hole shape that can be moved relatively in the horizontal direction to form a connecting long hole 4, and one side of the connecting long hole 4 has a large diameter insertion hole through which the head 6a of the bolt 6 can pass. 4a, the two sides of the connecting elongated hole 4 are stepped holes 5 in which the jaws 6b of the heads 6a of the bolts 6 are caught by the stepped portions 5a, and the movable member 2 and the connecting intermediate member are connected to the stepped hole 5 side. 11 and square block pieces that can be connected and fixed via bolts 6 are formed. The bottom surface of the chuck claw means 3 and the top surface of the movable member 2 can be connected and fixed by a locking portion 9 formed by a sawtooth-shaped protrusion edge, and the chuck claw means 3 can be connected to the chuck device via the locking portion 9. The movable member 2 of the main body 1 is configured to be detachable.

  The connecting elongated holes 4 penetrating the two opposing surfaces of the chuck claw means 3 forming the square block piece are movable when the axis of the stepped hole 5 is mounted on the movable member 2 with the chuck claw means 3. A connecting long hole shaft center line 8 which is on the moving shaft 7 of the member 2 and connects the shaft center of the stepped hole 5 and the shaft center of the large-diameter insertion hole 4a with respect to the moving shaft 7 of the movable member 2 is predetermined. The inclination angle α is maintained, and at least two connecting elongated holes 4 are arranged in parallel at a predetermined distance.

  The inclination angle α of the connecting long hole 4 is arbitrarily set within a range of ± 90 ° on the right and left sides of the connecting long hole axis 8 with respect to the moving shaft 7 serving as the axis of the movable member 2. It can be set, and the stepped hole 5 side is located on the rotation center side of the chuck device body 1.

  For other reference numerals, reference numeral 10 denotes a long groove recess that is slidable with respect to the intermediate connecting member 11 provided on the movable member 2.

  Example 1 will be described below with reference to FIG.

  FIG. 3 shows an example in which the inclination angle α of the connecting elongated hole 4 is inclined to the plus (+) side, (a) is a plan view, (b) is a BB cross-sectional view, and (c) is C It is -C sectional drawing.

  In the case of Example 1, it is an example at the time of making the inclination-angle of the elongate hole 4 for a connection into the right side (+ side) in the figure 30 degrees-40 degrees.

  A predetermined bolt 6 is screwed into the slidable intermediate member 11 in a state where it is not excessively screwed (two in this embodiment), and the chuck claw means 3 for forming a square block piece is viewed from above. Cover the intermediate member 11 so that the head 6a of the bolt 6 enters the portion of the large-diameter insertion hole 4a of the connecting elongated hole 4 and the axial center of the connecting elongated hole with the chuck pawl means 3 floating. At the position where the jaw 6b of the bolt 6 is hooked on the step 5a of the stepped hole 5 by moving horizontally along the line 8 (in the direction of arrow A in FIG. 2), the long groove recess 10 is formed. The movable member 2 has a locking portion 9 that is engaged with the head of the intermediate connecting member 11 and slidably fits, and that forms a sawtooth-shaped protruding edge portion carved on the bottom surface of the chuck claw means 3. For example, a hexagon of the head 6a of the bolt 6 at a position meshed with the upper surface 2a The bolt 6 is tightened with a tool and screwed into the intermediate connecting member 11 through the stepped hole 5, and the jaw 6 b of the bolt 6 comes into contact with the stepped part 5 a of the stepped hole 5 and is firmly screwed. The As shown in FIG. 2A, for example, in the case of a three-claw chuck, the same operation is repeated for all three, the workpiece contact surface 3a is set toward the center of rotation of the chuck device, and the workpiece is moved. The state where gripping is possible is completed, and the setup work before processing is completed.

  In the case of Example 2, as shown in FIG. 4, an example in which the inclination angle α of the connecting elongated hole 4 is 0 ° is shown, (a) is a plan view, and (b) is a DD sectional view. is there.

  This is the case where the connecting elongated hole axial center line 8 of the connecting elongated hole 4 is aligned with the moving shaft 7 which is the axis of the movable member 2. The difference from the first embodiment is that the chuck claw means 3 is set. Operation, that is, specifically, the horizontal movement of the chuck claw means 3 is performed along the moving shaft 7 serving as the axis of the movable member 2, and the chuck claw means 3 from the rotation center side of the chuck device body 1. And slide horizontally toward the outside in the radial direction to bring the jaw 6b of the bolt 6 into contact with the step 5a of the stepped hole 5, tighten the bolt 6 and screw it together, Is repeated, the workpiece contact surface 3a is set toward the center of rotation of the chuck device, the posture capable of gripping the workpiece is completed, and the setup work before processing is completed. Other explanations similar to those in the first embodiment are omitted.

  FIGS. 5A and 5B are explanatory diagrams in the case of the third embodiment, showing an example in which the inclination angle α of the connecting elongated hole 4 is inclined to the minus (−) side, FIG. 5A is a plan view, and FIG. It is EE sectional drawing.

  In Example 3, the α angle is inclined, for example, by 20 ° to 30 ° on the left side of the drawing opposite to the case of Example 1. Since other operations are the same as those in the first embodiment, description thereof is omitted.

  FIG. 6 is an explanatory diagram in the case of Example 4, showing an example in which the inclination angle α of the connecting elongated hole 4 is inclined by 90 ° to the plus (+) side, (a) is a plan view, (b) ) Is an F-F cross-sectional view.

  In the fourth embodiment, the connecting elongated hole 4 is provided in a direction perpendicular to the right side with respect to the moving shaft 7 of the movable member 2, and the chuck claw means 3 is set by sliding from the left side to the right side in the drawing. Others are the same as in the case of the first embodiment, and a description thereof will be omitted.

  FIG. 7 is an explanatory diagram in the case of the fifth embodiment, and is an explanatory diagram illustrating an example in which the inclination angle α of the connecting elongated hole 4 is inclined 90 ° toward the minus (−) side, (a) is a plan view, (B) is GG sectional drawing.

  In the fifth embodiment, a connecting long hole 4 is provided in a direction perpendicular to the left side with respect to the moving shaft 7 of the movable member 2 in the case where it is opposite to the case of the above-described fourth embodiment, and the chuck claw means 3 is shown in the drawing. In this case, the slider is set by sliding from the right side to the left side. Others are the same as in the case of the first embodiment, and a description thereof will be omitted.

  As described above, the chuck claw means according to the present invention can be used by using an existing chuck device as it is, is very easy to operate, and is configured to be detachable with one touch on the movable member of the chuck device body. As a result, it is possible to provide a chuck device used in a machine tool that can simplify the work contents in the setup process, shorten the replacement work time, and improve the processing efficiency as well as the production efficiency.

  The chuck device according to the present invention includes a contact surface 3a that contacts when the chuck claw means 3 grips a workpiece, and a bolt hole that penetrates from one side of the surface orthogonal to the contact surface 3a to the other side. 6 is formed in a long hole shape that can move relatively in a horizontal direction in a standing state to form a connecting long hole 4. One side of the connecting long hole 4 has a diameter through which the head 6 a of the bolt 6 can pass. The large-diameter insertion hole 4a has a large-diameter insertion hole 4a. The large-diameter insertion hole 4a has a stepped hole 5 in which the jaw 6b of the head 6a of the bolt 6 is hooked by the step 5a. Even when the chuck claw means 3 is positioned and tightened by tightening the bolt 6 with the stepped hole 5 even when the chuck claw means 3 is positioned on the rotation center side, the chuck claw means 3 has a locking portion 9 that forms a serrated projection edge. Since the upper surface 2a of the movable member 2 is engaged and fixed, the large-diameter insertion hole 4a and the stepped hole As shown in claim 3, the chuck claw means 3 can be mounted freely in all 360 ° directions, that is, from the rotation center side or from the outer peripheral side of the main body. It is. Furthermore, the workpiece contact surface can be used on both opposing surfaces, and the direction of the chuck claw means can be freely selected.

  More specifically, in the embodiments shown in Examples 1 to 5 (FIGS. 3 to 7), the opposite surface, which is the back surface, is replaced with a contact surface, and the mounting direction is also from the opposite side. It can also be fitted. That is, since the surface opposite to the workpiece contact surface shown in the drawing can also be used as the contact surface, it is possible to use one contact surface as a flat surface and the other opposite surface as a curved surface. .

BRIEF DESCRIPTION OF THE DRAWINGS Explanatory drawing which shows an example of embodiment of the chuck apparatus based on this invention, (a) Top view, (b) Front view, (c) Side view, (d) Perspective view An explanatory view showing an example of a state in which the chuck claw means is mounted on the chuck device main body, (a) front view, (b) AA sectional view (an enlarged cross section in a state in which the chuck claw means is mounted on the movable member of the chuck device main body) (Figure) (A), (b) explanatory drawing of Example 1 (A), (b) Explanatory drawing of Example 2. (A), (b) explanatory drawing of Example 3 (A), (b) explanatory drawing of Example 4 (A), (b) explanatory drawing of Example 5

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Chuck apparatus main body 2 Movable member 3 Chuck claw means 3a Contact surface 4 Connection long hole 4a Large diameter insertion hole 5 Stepped hole 5a Step part 6 Bolt 6a Head part 6b Jaw part 7 Moving shaft 8 Linking long hole shaft center Line 9 Locking part (sawtooth-shaped protrusion edge)
10 Long groove recess 11 Intermediate connecting member α Inclination angle

Claims (3)

  A chuck device comprising a plurality of chuck claw means for detachably mounting a workpiece on a movable member that is movable in a radial direction within the chuck device body in accordance with the size of the workpiece, wherein the chuck claw means Is a long hole shape that can move relatively horizontally in a state where the bolt is standing up through a bolt hole penetrating from one side to the other side of the contact surface that is in contact with the workpiece and the surface orthogonal to the corresponding contact surface. Drilled into a long hole for connection, one side of the long hole for connection is a large-diameter insertion hole with a large diameter through which the head of the bolt can pass, and the jaw part of the head of the bolt is stepped on the two sides of the long hole for connection A stepped hole that is hooked at a portion is formed, and on the side of the stepped hole, the movable member, a rectangular block piece that can be connected and fixed via a connecting intermediate member and a bolt are formed, and the chuck device main body is connected via the movable member. Characterized by a removable configuration Jack apparatus.   The connecting elongated holes penetrating the two opposing surfaces of the chuck claw means forming the square block piece are arranged so that the axis of the stepped hole is attached to the movable member when the chuck claw means is mounted on the movable member. On the moving shaft, a long hole shaft center line for connecting the shaft center of the stepped hole and the shaft center of the large-diameter insertion hole maintains a predetermined inclination angle with respect to the moving shaft of the movable member. 2. The chuck device according to claim 1, wherein at least two of the connecting elongated holes are arranged in parallel at a predetermined distance.   3. The configuration according to claim 2, wherein the inclination angle can be set in a range of 360 ° of the long axis of the connecting long hole with respect to the moving axis serving as the axis of the movable member. Chuck device.

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