JP2020199614A - Finger chuck connecting device - Google Patents

Abstract

To provide a finger chuck connecting device capable of attaching and detaching a finger chuck with easy operation.SOLUTION: A connecting device for connecting a finger chuck holding a material with a spindle to which the finger chuck is detachably assembled is provided. An engaging member is attached to one of a rear end of the finger chuck and a front tip of the spindle. A locking shaft member configured to be insertable and engageable into/with the engaging member is provided on one of the spindle and the finger chuck. The locking shaft member comprises a locking part extending in a radial direction, and a pressing member for pressing the engaging member in an axial direction. The engaging member comprises a through hole allowing the locking shaft member to be inserted therein, and a pocket part engageable with the locking part. The finger chuck and the spindle are connected by rotating the finger chuck in a circumferential direction so as to engage the locking part with the pocket part.SELECTED DRAWING: Figure 2

Description

The present invention relates to a finger chuck connecting device in a bar material feeder and a bar material ejector.

The bar material feeder is provided with a feed rod for feeding the bar material to a bar material processing machine such as a lathe. A shaft portion at the rear end of the finger chuck is rotatably inserted and connected to the tubular portion at the tip of the feed rod, and the rear end portion of the bar is gripped by the chuck portion at the tip of the finger chuck (for example, Patent Document). See 1, 2 and 3). Further, the bar material ejector receives the processed bar material processed by the bar material processing machine by the finger chuck and discharges it from the bar material processing machine (see, for example, Patent Document 4).

Since the finger chuck needs to be replaced according to the size of the diameter of the rod material to be fed into the lathe or the like, it is detachably connected to the feed rod via a connecting device.

In this connecting device, (1) the chuck portion of the finger chuck is fixed to the shaft portion with a set screw (see, for example, Patent Document 1), and (2) the shaft portion of the finger chuck is attached to the tip of the feed rod. A finger chuck is rotatably inserted into a fixed tubular portion, and a finger chuck is attached to and detached from a feed rod by a connecting device provided between the tubular portion and the shaft portion (see, for example, Patent Document 2), (3). An engaging groove and a guide groove are formed in the operation cylinder, the operation cylinder is slid in the circumferential direction, the protrusion is slid in the guide groove to release the connection, and the operation cylinder is slid in the axial direction to engage the protrusion. There is one that is slid in the groove and connected (see, for example, Patent Document 3). Further, as another configuration, a screw groove is formed at the end of the finger chuck, and the finger chuck is screwed into the connecting member formed on the feed rod via the screw groove to connect the finger chuck. It has been known.

Japanese Unexamined Patent Publication No. 9-7701 Jitsufuku No. 7-27042 Japanese Unexamined Patent Publication No. 2006-239798 Japanese Unexamined Patent Publication No. 4-343602

The conventional finger chuck connecting device has a problem that, for example, in the connecting device of (1) above, a troublesome operation of tightening or loosening a set screw by using a tool is required to attach / detach the finger chuck.

Further, in the connecting device of the above (2), an annular recess is formed on the outer peripheral surface of the shaft portion, and a through hole facing the recess is formed in the cylinder portion when the shaft portion is inserted, and the through hole is formed. The sphere is movably inserted in the radial direction of the cylinder, the operation cylinder is slidably covered in the circumferential direction and the axial direction, and the inner circumference of the operation cylinder presses the sphere into the recess. An escape hole is provided to allow the surface and the sphere to escape to the outside of the recess, and when the operation cylinder is slid in the circumferential direction, the state where the sphere is released by the escape hole shifts to the state where the sphere is pressed by the inner peripheral surface. ing. However, the escape hole and the sphere cannot be visually recognized from the outside of the operation cylinder. For example, when the operation cylinder is turned in the circumferential direction to release the pressure and then the operation cylinder is returned to the original position, the original position cannot be known. , The operation when pressing again becomes troublesome. Further, since the shaft portion of the finger chuck is held in the cylinder portion of the feed rod via the bearing, the finger chuck becomes longer and bulky, the attachment / detachment to / from the feed rod becomes troublesome, and the sphere of the attachment / detachment device rotates. There is a problem that the sphere, the shaft portion, and the like are easily worn because they come into contact with the shaft portion.

Further, the connecting device of (3) above has a problem that the operation of the connecting device is complicated because it is necessary to rotate or slide the operation cylinder in the circumferential direction or the axial direction when attaching / detaching the finger chuck. It was.

An object of the present invention is to solve such a problem, and an object of the present invention is to provide a finger chuck connecting device capable of attaching and detaching a finger chuck with a simpler operation.

In order to solve the above problems, the connecting device according to the present invention is a connecting device that connects a finger chuck that holds a material and a spindle that detachably assembles the finger chuck, and is a rear end of the finger chuck or the above. An engaging member is attached to either one of the tips of the spindle, and either the spindle or the finger chuck is provided with a locking shaft member configured to be insertable and engageable in the engaging member. The locking shaft member includes a locking portion extending in the radial direction and a pressing member that presses the engaging member in the axial direction, and the engaging member has a through hole into which the locking shaft member can be inserted. A pocket portion that can be engaged with the locking portion is provided, and the finger chuck is connected to the spindle by rotating the finger chuck in the circumferential direction and engaging the locking portion with the pocket portion. It is characterized by that.

Further, in the connecting device according to the present invention, the through hole includes a locking portion penetrating portion through which the locking portion can be inserted, and the locking portion penetrating portion and the pocket portion are approximately 90 ° in the circumferential direction. It is preferable that they are arranged in a staggered manner.

Further, in the connecting device according to the present invention, it is preferable that the locking portion penetrating portion and the pocket portion are in contact with each other via a tapered portion inclined in the axial direction.

Further, in the connecting device according to the present invention, the pocket portion is formed on the rear end side of the finger chuck of the engaging member, and the rear end of the finger chuck prevents contact with the locking shaft member. It is preferable that a retractable portion is formed.

Further, in the connecting device according to the present invention, it is preferable that the pressing member is pressed in the axial direction by the elastic member and can come into contact with the flange portion formed on the locking shaft member.

According to the present invention, the finger chuck and the spindle can be connected only by engaging the locking portion with the pocket portion of the engaging member, so that the finger chuck can be connected with a simpler operation.

Further, according to the present invention, since the locking portion penetrating portion through which the locking portion is inserted and the pocket portion are arranged so as to be displaced by approximately 90 ° in the circumferential direction, the locking portion is inserted into the locking portion penetrating portion. Since the locking portion and the pocket portion can be engaged with each other simply by rotating the finger chuck in the circumferential direction by approximately 90 °, the finger chuck can be connected with a simpler operation.

The perspective view of the bar ejector provided with the coupling device which concerns on embodiment of this invention. The cross-sectional view for demonstrating the structure of the coupling apparatus which concerns on embodiment of this invention. The perspective view of the engaging member of the coupling device which concerns on embodiment of this invention. A view of arrow A in FIG. The figure for demonstrating the coupling operation of the coupling apparatus which concerns on embodiment of this invention. The figure for demonstrating the coupling operation of the coupling apparatus which concerns on embodiment of this invention.

Hereinafter, preferred embodiments for carrying out the present invention will be described with reference to the drawings. It should be noted that the following embodiments do not limit the invention according to each claim, and not all combinations of features described in the embodiments are essential for the means for solving the invention. ..

FIG. 1 is a perspective view of a bar ejector provided with a connecting device according to an embodiment of the present invention, and FIG. 2 is a sectional view for explaining a configuration of a connecting device according to an embodiment of the present invention. , FIG. 3 is a perspective view of an engaging member of the coupling device according to the embodiment of the present invention, FIG. 4 is a view taken along the line A in FIG. 3, and FIG. 5 is a connection according to the embodiment of the present invention. It is a figure for demonstrating the connection operation of the apparatus, and FIG. 6 is a figure for demonstrating the connection operation of the connection apparatus which concerns on embodiment of this invention.

As shown in FIG. 1, the bar ejector 1 provided with the connecting device according to the present embodiment receives and discharges the processed bar from a bar processing device such as a lathe having two spindles. It includes a main body portion 2 having 5, a pair of leg portions 3 that support the main body portion 2, and an operation portion 4 that is provided on the main body portion 2 and performs various operations.

A feed rod (not shown) is horizontally arranged in the main body 2 of the bar ejector 1. The feed rod can be moved on an extension of the spindle of the bar processing device by a known driving device (not shown).

As shown in FIG. 2, in the connecting device 10 according to the present embodiment, the spindle 7 connected to the tip of the feed rod and the finger chuck 6 are detachably connected to each other. The rear end portion of a material such as a bar is gripped by the chuck portion of the finger chuck 6.

The coupling device 10 according to the present embodiment is formed on the engaging member 11 attached to the rear end of the finger chuck 6 and the spindle 7, and is configured to be insertable and engageable in the engaging member 11. A stop shaft member 12 is provided. At the rear end of the finger chuck 6, a retracting portion 18 is formed so that the locking portion 14 of the locking shaft member 12 described later can rotate in the circumferential direction, and the diameter of the retracting portion 18 is the diameter of the locking portion 14. It is formed larger than the axial length.

The locking shaft member 12 is a shaft member fixed to a connecting side member 13 arranged in the spindle 7, and a locking portion 14 extending in the radial direction is formed at a tip portion inserted into the engaging member 11. ing. The locking portion 14 is a pin-shaped member, and is inserted into a through hole formed through the locking shaft member 12 in the radial direction to be fixed or press-fitted, and the tip end side and the proximal end side of the pin-shaped member are engaged. It is fixed so as to protrude from the outer surface of the stop shaft member 12. That is, the axial length of the locking portion 14 is formed to be longer than the diameter of the locking shaft member 12.

Further, a collar portion 15 is formed on the locking shaft member 12. The flange portion 15 is formed as a step that expands in diameter in the radial direction at a substantially central portion in the longitudinal direction of the locking shaft member 12. Further, a pressing member 16 urged in the axial direction by the elastic body 17 is attached between the flange portion 15 and the connecting side member 13.

The pressing member 16 is a circular tubular member that can be inserted into the locking shaft member 12 and can come into contact with the collar portion 15, and is a connecting side between the main body 16a having an inner circumference through which the collar portion 15 can be inserted and the main body 16a. It is formed at the end portion on the member 13 side, and includes a flange portion contact portion 16b that can contact the collar portion 15. The elastic body 17 described above is in contact with the end of the flange contact portion 16b on the connecting side member 13 side, and the pressing member 16 is brought into contact with the collar 15 by the elastic force of the elastic body 17. Is urged toward the tip end side of the locking shaft member 12. Any member may be applied to the elastic body 17 as long as it has an elastic force, and for example, a coil spring or a tubular member made of rubber is preferably used.

Next, the engaging member 11 of the connecting device 10 according to the present embodiment will be described with reference to FIG. The engaging member 11 is a disk-shaped member having a through hole 21 penetrating in the axial direction at the center. As shown in FIG. 2, a pocket portion 22 extending in the radial direction is formed on the rear end side of the finger chuck 6 of the engaging member 11. Further, as shown in FIG. 4, the through hole 21 is formed in an elongated hole shape having a locking portion penetrating portion 23 so as to be displaced substantially 90 ° in the circumferential direction from the pocket portion 22 and extend in the radial direction. ..

As shown in FIG. 3, the longitudinal direction of the through hole 21 and the pocket portion 22 are in contact with each other via a tapered portion 25 that is inclined in the axial direction from the locking portion penetrating portion 23 toward the pocket portion 22. A plurality of mounting holes 24 are formed in the engaging member 11, and the engaging member 11 and the finger chuck 6 are connected to each other by fastening a fastening means such as a bolt to the mounting holes 24.

Next, the operation of the connecting device 10 according to the present embodiment will be described with reference to FIGS. 5 and 6. As shown in FIG. 5, in the connection between the finger chuck 6 and the spindle 7 of the connecting device 10 according to the present embodiment, the finger chuck 6 is inserted into the spindle 7 and the locking shaft member extends axially from the connecting side member 13. 12 is inserted into the through hole 21 in the engaging member 11. At this time, since the through hole 21 is formed in an elongated hole shape, the locking portion 14 of the locking shaft member 12 is positioned in the elongated hole direction so as to insert the locking portion penetrating portion 23. It can be inserted in the direction.

In this state, when the finger chuck 6 is further pushed toward the connecting side member 13, the pressing member 16 comes into contact with the engaging member 11 and compresses the elastic body 17. Here, when the locking portion 14 reaches the end surface of the engaging member 11 on the finger chuck 6 side, the locking portion 14 can rotate in the circumferential direction in the retracting portion 18 formed at the rear end of the finger chuck 6. Therefore, the finger chuck 6 can be rotated by approximately 90 ° while pressing the finger chuck 6 toward the connecting side member 13.

Then, as shown in FIG. 6, the locking portion 14 engages with the pocket portion 22 following the tapered portion 25. Here, when the push of the finger chuck 6 toward the connecting side member 13 side is released, the pressing member 16 pushes the engaging member 11 in the axial direction by the elastic force of the elastic body 17, so that the locking portion 14 is locked in the pocket portion 22. Is pressed down, and the finger chuck 6 and the spindle 7 can be connected to each other.

When removing the finger chuck 6, the pocket portion 22 and the locking portion 14 are removed by pushing the finger chuck 6 toward the connecting side member 13 so as to resist the elastic force of the elastic body 17, contrary to the above mounting procedure. The finger chuck 6 can be pulled out by aligning the locking portion 14 and the through hole 21 by rotating the finger chuck 6 in the opposite direction by 90 ° with the finger chuck 6 pushed in. It will be possible.

As described above, according to the connecting device 10 according to the present embodiment, the finger chuck 6 and the spindle 7 can be connected only by rotating the finger chuck 6 after inserting the finger chuck 6 into the spindle 7. The finger chuck 6 can be attached / detached with a simpler operation without using a tool or operating another operation unit.

In the connecting device 10 according to the above embodiment, the case where the finger chuck 6 is pushed toward the connecting side member 13 and the finger chuck 6 is rotated clockwise has been described, but the rotation direction is not limited to this. It may be formed counterclockwise. In this case, it is preferable that the tapered portion 25 is formed on the side opposite to the position shown in FIGS. 3 and 6.

The locking portion 14 and the pocket portion 22 are engaged by sliding and rotating the surface of the engaging member 11 on the finger chuck 6 side when the finger chuck 6 is rotated without forming the tapered portion 25. It doesn't matter. With this configuration, the finger chuck 6 can be attached and detached by rotating it in either the clockwise or counterclockwise direction, and the engagement margin between the pocket portion 22 and the locking portion 14 also increases. , The finger chuck 6 and the spindle 7 can be connected more firmly. Further, in the connecting device 10 according to the above embodiment, the case where the finger chuck 6 is pushed into the connecting side member 13 side at the time of connecting and disconnecting the finger chuck 6 to perform the attachment / detachment operation has been described, but this pushing operation is performed. It is not essential, and the finger chuck 6 may be configured so that it can be attached and detached without performing the pushing operation. It is clear from the description of the claims that the form with such changes or improvements may be included in the technical scope of the present invention.

1 Bar ejector, 2 Main body, 3 Legs, 4 Operation, 5 Discharge, 6 Finger chuck, 7 Spindle, 10 Coupling device, 11 Engagement member, 12 Locking shaft member, 13 Coupling side member, 14 Locking part, 15 flange part, 16 pressing member, 16a main body, 16b flange contact part, 17 elastic body, 18 retracting part, 21 through hole, 22 pocket part, 23 locking part penetration part, 24 mounting hole, 25 Tapered part.

Claims (5)

A connecting device that connects a finger chuck that holds a material and a spindle that detachably assembles the finger chuck.
An engaging member is attached to either the rear end of the finger chuck or the tip of the spindle.
Either the spindle or the finger chuck is provided with a locking shaft member configured to be insertable and engageable with the engaging member.
The locking shaft member includes a locking portion extending in the radial direction and a pressing member that presses the engaging member in the axial direction.
The engaging member includes a through hole into which the locking shaft member can be inserted and a pocket portion capable of engaging with the locking portion.
A coupling device characterized in that the finger chuck and the spindle are connected by rotating the finger chuck in the circumferential direction and engaging the locking portion with the pocket portion. In the coupling device according to claim 1,
The through hole includes a locking portion penetrating portion through which the locking portion can be inserted.
A connecting device characterized in that the locking portion penetrating portion and the pocket portion are arranged so as to be displaced by approximately 90 ° in the circumferential direction. In the coupling device according to claim 2,
A connecting device characterized in that the locking portion penetrating portion and the pocket portion are in contact with each other via a tapered portion inclined in the axial direction. In the coupling device according to any one of claims 1 to 3,
The pocket portion is formed on the rear end side of the finger chuck of the engaging member.
A connecting device characterized in that a retracting portion for preventing contact with the locking shaft member is formed at the rear end of the finger chuck. In the coupling device according to any one of claims 1 to 4.
The connecting device is characterized in that the pressing member is pressed in the axial direction by an elastic member and can come into contact with a flange portion formed on the locking shaft member.

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