JP7319659B2 - Finger chuck coupling device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a finger chuck connecting device in a bar feeder or bar discharger.

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

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

This connecting device includes (1) a device in which the chuck portion of the finger chuck is fixed to the shaft portion with a set screw (see, for example, Patent Document 1); The finger chuck is rotatably inserted into a fixed cylindrical portion, and the finger chuck is attached to and detached from the feed rod by a connecting device provided between the cylindrical portion and the shaft portion (see, for example, Patent Document 2), (3). An engaging groove and a guide groove are formed in the operation barrel, the operation barrel is slid in the circumferential direction to slide the projection in the guide groove to release the connection, and the operation barrel is slid in the axial direction to engage the projection. There is one in which they are slid in a matching groove to be connected (see, for example, Patent Document 3). In another configuration, a thread groove is formed at the end of the finger chuck, and the finger chuck is connected by screwing the finger chuck into a connecting member formed on the feed rod through the thread groove. It has been known.

JP-A-9-70701 Japanese Utility Model Publication No. 7-27042 JP-A-2006-239798 JP-A-4-343602

A conventional finger chuck connecting device, for example, the connecting device of (1) above has a problem that it requires a troublesome operation of tightening and loosening a set screw using a tool for attaching and detaching the finger chuck.

Further, in the coupling device of (2) above, an annular recess is formed in the outer peripheral surface of the shaft portion, and a through hole is formed in the tubular portion so as to face the recess when the shaft portion is inserted. A spherical body is inserted movably in the radial direction of the cylindrical portion, and an operating cylinder is put on the cylindrical portion so as to slide in the circumferential and axial directions. An escape hole is provided for escaping the surface and the sphere 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 changes to the state where the sphere is pressed by the inner peripheral surface. ing. However, the escape hole and the sphere cannot be seen from the outside of the operation barrel. , the operation when pressing again becomes troublesome. In addition, since the shaft portion of the finger chuck is held in the cylindrical portion of the feed rod via a bearing, the finger chuck is lengthened and bulky, making attachment and detachment to and from the feed rod cumbersome. There is a problem that the sphere, the shaft, etc. are likely to be worn because they come into contact with the shaft.

In addition, 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 and detaching the finger chuck. rice field.

SUMMARY OF THE INVENTION It is an object of the present invention to solve such problems, and to provide a finger chuck connecting device that can attach and detach a finger chuck with a simpler operation.

In order to solve the above-mentioned problems, a connecting device according to the present invention is a connecting device for connecting a finger chuck holding a material and a spindle on which the finger chuck is detachably assembled, the connecting device comprising a rear end of the finger chuck or the above described finger chuck. An engaging member is attached to one of the ends of a spindle, and the other of the spindle and 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 radially extending locking portion and a pressing member that axially presses the engaging member. The engaging member has a through hole into which the locking shaft member can be inserted. and a pocket portion that can be engaged with the locking portion, and 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. , the through hole includes a locking portion through portion through which the locking portion can be inserted, the locking portion penetrating portion and the pocket portion are displaced from each other by approximately 90° in the circumferential direction, and the locking portion The through portion and the pocket portion are connected to each other via a tapered portion that is inclined in the axial direction .

Further, in the connection 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 if a retraction portion is formed.

Further, in the coupling device according to the present invention, it is preferable that the pressing member is pressed in the axial direction by an elastic member and can abut against a flange formed on the locking shaft member.

According to the present invention, since the finger chuck and the spindle can be connected simply by engaging the locking portion with the pocket portion of the engaging member, 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 displaced by approximately 90° in the circumferential direction, the locking portion is inserted into the locking portion penetrating portion. After that, the locking portion and the pocket portion can be engaged simply by rotating the finger chuck by approximately 90° in the circumferential direction, so that the finger chuck can be connected with a simpler operation.

1 is a perspective view of a bar discharger provided with a coupling device according to an embodiment of the present invention; FIG. BRIEF DESCRIPTION OF THE DRAWINGS Sectional drawing for demonstrating the structure of the coupling device which concerns on embodiment of this invention. 4 is a perspective view of an engaging member of the coupling device according to the embodiment of the invention; FIG. The A arrow directional view in FIG. The figure for demonstrating the connection operation|movement of the connection apparatus which concerns on embodiment of this invention. The figure for demonstrating the connection operation|movement of the connection apparatus which concerns on embodiment of this invention.

Preferred embodiments for carrying out the present invention will be described below with reference to the drawings. In addition, 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 solution of the invention. .

FIG. 1 is a perspective view of a bar discharger equipped with a connecting device according to an embodiment of the present invention, and FIG. 2 is a sectional view for explaining the configuration of the connecting device according to an embodiment of the present invention. 3 is a perspective view of an engaging member of a coupling device according to an embodiment of the present invention, FIG. 4 is a view in the direction of arrow A in FIG. 3, and FIG. 5 is a coupling according to an embodiment of the present invention. FIG. 6 is a diagram for explaining the connection operation of the device, and FIG. 6 is a diagram for explaining the connection operation of the connection device according to the embodiment of the present invention;

As shown in FIG. 1, a bar discharger 1 equipped with a coupling device according to the present embodiment has a discharge section that receives and discharges processed bars from a bar processing device such as a lathe having two spindles. 5, a pair of leg portions 3 for supporting the body portion 2, and an operation portion 4 provided on the body portion 2 for performing various operations.

A feed rod (not shown) is horizontally arranged in the main body 2 of the bar discharger 1 . The feed rod can be moved along an extension line of the main shaft of the bar processing apparatus by a known driving device (not shown).

As shown in FIG. 2, the connecting device 10 according to this embodiment detachably connects the spindle 7 connected to the tip of the feed rod and the finger chuck 6 . The chuck portion of the finger chuck 6 grips the rear end portion of a material such as a bar.

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

The locking shaft member 12 is a shaft member that is fixed to a connecting side member 13 arranged in the spindle 7, and has a radially extending locking portion 14 formed at a distal end thereof that is inserted into the engaging member 11. ing. The locking portion 14 is a pin-shaped member, and is inserted and fixed or press-fitted into a through hole formed through the locking shaft member 12 in the radial direction, and the distal 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 longer than the diameter of the locking shaft member 12 .

A flange 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 substantially central portion of the locking shaft member 12 in the longitudinal direction. A pressing member 16 that is axially biased by an 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 flange portion 15. A flange abutting portion 16 b is formed at the end on the member 13 side and is capable of coming into contact with the flange 15 . The elastic body 17 described above is in contact with the end portion of the flange contact portion 16 b on the side of the connecting side member 13 , and the elastic force of the elastic body 17 causes the pressing member 16 to contact the flange portion 15 . is biased toward the distal end side of the locking shaft member 12 . The elastic body 17 may be any member as long as it has an elastic force. 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 this embodiment will be described with reference to FIG. The engaging member 11 is a disc-shaped member having a through hole 21 extending axially through the central portion thereof. As shown in FIG. 2 , a radially extending pocket portion 22 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 through portion 23 extending in the radial direction while being displaced from the pocket portion 22 by approximately 90° in the circumferential direction. .

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

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

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 engaging portion 14 reaches the end face of the engaging member 11 on the side of the finger chuck 6 , the engaging portion 14 can rotate in the circumferential direction within the retreat portion 18 formed at the rear end of the finger chuck 6 . Therefore, it is possible to rotate the finger chuck 6 by approximately 90° while pressing the finger chuck 6 toward the connecting side member 13 side.

Then, as shown in FIG. 6, the locking portion 14 follows the tapered portion 25 and engages with the pocket portion 22 . Here, when the pushing of the finger chuck 6 toward the connecting side member 13 is released, the elastic force of the elastic body 17 causes the pressing member 16 to push the engaging member 11 in the axial direction. is pressed down to allow the finger chuck 6 and the spindle 7 to be connected.

When removing the finger chuck 6, the pocket portion 22 and the locking portion 14 are separated by pushing the finger chuck 6 toward the connecting side member 13 side so as to resist the elastic force of the elastic body 17, in reverse to the above-described mounting procedure. is released and the finger chuck 6 is rotated in the opposite direction by 90° while the finger chuck 6 is pushed in, so that the engagement portion 14 and the through hole 21 are aligned with each other, and the finger chuck 6 can be pulled out. It becomes 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 simply by rotating the finger chuck 6 after inserting the finger chuck 6 into the spindle 7. It is possible to attach and detach the finger chuck 6 with a simpler operation without using a tool or operating other operating parts.

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

Instead of forming the tapered portion 25, the locking portion 14 and the pocket portion 22 are engaged with each other by rotating the surface of the engaging member 11 on the side of the finger chuck 6 in sliding contact when the finger chuck 6 rotates. I don't mind. With this configuration, the finger chuck 6 can be attached and detached by rotating in either clockwise or counterclockwise direction, and the engagement margin between the pocket portion 22 and the locking portion 14 is increased. , the finger chuck 6 and the spindle 7 can be connected more firmly. Further, in the connection device 10 according to the above-described embodiment, the case where the finger chuck 6 is pushed toward the connection side member 13 to perform the attachment/detachment operation when connecting and disconnecting the finger chuck 6 has been described. It is not essential, and it may be configured such that the finger chuck 6 can be attached and detached without performing the pressing operation. It is clear from the description of the scope of claims that forms with such modifications or improvements can also be included in the technical scope of the present invention.

REFERENCE SIGNS LIST 1 bar discharger 2 main body 3 leg 4 operation part 5 discharge part 6 finger chuck 7 spindle 10 connecting device 11 engaging member 12 locking shaft member 13 connecting side member 14 Locking portion 15 Collar 16 Pressing member 16a Main body 16b Collar contacting portion 17 Elastic body 18 Withdrawal portion 21 Through hole 22 Pocket portion 23 Locking portion through portion 24 Mounting hole 25 tapered part.

Claims (3)

A connecting device for connecting a finger chuck holding a material and a spindle for detachably assembling 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 radially extending locking portion and a pressing member that axially presses the engaging member,
The engaging member includes a through hole into which the locking shaft member can be inserted and a pocket portion that can be engaged with the locking portion,
By rotating the finger chuck in the circumferential direction and engaging the locking portion with the pocket portion, the finger chuck and the spindle are connected,
The through hole includes a locking portion through portion through which the locking portion can be inserted,
The locking portion penetrating portion and the pocket portion are arranged to be shifted by approximately 90° in the circumferential direction,
A connecting device , wherein the engaging portion penetrating portion and the pocket portion are connected to each other via a tapered portion inclined in an axial direction . A coupling device according to claim 1 , wherein
The pocket portion is formed on the rear end side of the finger chuck of the engaging member,
A connecting device, wherein a retraction portion is formed at a rear end of the finger chuck to prevent contact with the locking shaft member. 3. A coupling device according to claim 1 or 2 ,
The connecting device, wherein the pressing member is axially pressed by an elastic member and can abut against a flange formed on the locking shaft member.

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