JPS6131790Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention provides a tool storage device that advances a tool cartridge holding a plurality of tools to a tool exchange position during tool exchange, and more specifically, a tool storage device that advances a tool cartridge holding a plurality of tools to a tool exchange position. A tool cartridge is supported on a guide member that moves between the plurality of tool cartridges so as to be movable in a direction intersecting the moving direction of the guide member, and one of the plurality of tool cartridges is held in a state where the guide member is located at a backward end. The present invention relates to a tool storage device that is carried onto a guide member and moved to a tool exchange position.

Generally, in such a tool storage device, the tool cartridge is prevented from moving relative to the guide member during the tool exchange operation so that the tool exchange can be performed smoothly, and when the guide member is located at the rearward end, the tool cartridge is guided. It is necessary to allow the tool cartridge to be moved in and out of the guide member so that it can move relative to the member.

To this end, a dowel pin that moves forward and backward on the guide member and engages with an engagement hole formed in the tool cartridge at the forward end, and a cylinder device that moves this forward and backward are provided. The device may be operated so that the knock pin engages the tool cartridge only when the guide member is in the tool change position;
Not only is a special cylinder device required for moving the knock pin forward and backward, but also the control circuit becomes complicated.

The present invention was developed in view of these conventional problems, and utilizes the movement of the guide member back and forth between the tool exchange position and the retreat end to engage and disengage a positioning member such as a dowel pin from a tool cartridge. The object of this invention is to allow the positioning member to move forward and backward without providing a special drive source.

Embodiments of the present invention will be described below based on the drawings. In Fig. 1, 1 is a bed, 2 is a support table for a workpiece W that is movably provided on the bed 1, and 3 is a gate-shaped column installed on the bed 1 so as to straddle the support table 2. , 4 is a slide table that is supported to be horizontally slidable at the top of the column 1, and 5 is an elevator table that is supported by the slide table 4 so that it can move up and down in the vertical direction. 6 is integrally provided, and a main shaft 7 rotatable about a vertical line is supported on the main shaft head 6. Reference numeral 8 designates a horizontal feed movement motor for the slide table 4, 9 a servo motor for lifting and lowering the lifting table 5, and 10 a main shaft driving motor.

On the other hand, numeral 11 is a tool storage device installed between the columns 3 on the left and above the support table 2, as shown in FIG. That is, a support bracket 12 is fixed between the left and right columns 3, and a guide member 13 having a guide groove 13a formed in a direction parallel to the sliding direction of the slide table 4 is disposed on the support bracket 12. . On the rear surface of this guide member 13, as shown in FIG.
5 are fixed at the ends of the pair of support bars 15,
By holding the guide member 15 from above and below by a plurality of guide rollers 16 pivotally supported on the support bracket 12, the guide member 13 can be moved in a direction perpendicular to the sliding direction of the slide table 4. The guide member 13 is connected to the support bracket 12 via a reinforcing plate 17 whose edges are fixed to the pair of support bars 15, 15 and the guide member 13, and a connecting block 17a fixed to the reinforcing plate 17. The guide member 13 is mounted on the top and connected to the piston rod of a cylinder device 18, and the operation of the cylinder device 18 causes the guide member 13 to move between the retracted end shown in solid lines in FIG. 3 and the tool change position shown in two-dot chain lines. Advances and retreats.

Furthermore, a pair of fixed guide members 20a and 20b are provided on both sides of the guide member 13 and are fixed to the front surface of the column 3. The pair of fixed guide members 20a and 20b have a structure in which the guide member 13 is positioned when the guide member 13 is located at the rearward end indicated by the solid line in FIG.
Horizontal guide grooves 21a and 21b are cut in line with the guide groove 13a formed in the horizontal direction. Then, the guide groove 13a of the guide member 13
In either one of the guide grooves 21a, 21b of the pair of fixed guide members 20a, 20b, a tool cartridge 22a, which holds a plurality of tools T at regular intervals in the sliding direction of the slide table 4, is installed. 22b is guided and supported.

These tool cartridges 22a, 22b are equipped with a plurality of tool gripping devices 24 for holding tools T at regular intervals, and engagement shafts 23a, 23b protrude upward from the center of the top surface. The shafts 23a and 23b are supported at the upper portions of the guide member 13 and the fixed guide members 20a and 20b so as to be movable in a direction parallel to the sliding direction of the slide table 4, and are located at both ends of the engaging member 25 that is moved by the cylinder device 27. Engagement recess 2 formed at the bottom
5a and 25b.

Further, the guide member 13 includes a guide member 13
A dowel pin 30 is provided which is movable in the forward and backward directions of the tool cartridge and which fits into positioning engagement holes 28 formed in the tool cartridges 22a and 22b at the forward end position. The retracted end of the knock pin 30 connects the guide member 13 which is pivotably supported in a horizontal plane on a reinforcing plate 17 that moves forward and backward together with the guide member 13.
The locking lever 31 is secured to one end of a rotating lever 31 that extends in a direction substantially perpendicular to the advancing and retracting directions of The rotating lever 31 is rotated counterclockwise in FIG.
A spring 33 is tensioned to move it in the direction of engagement with the engagement holes 28 of a and 22b.

Further, an abutment shaft 35 is provided to protrude upward on the side closer to the spring engagement end than the pivot shaft of the rotary lever 31, and supports the cylinder device 18 on the support bracket 12.
On the front surface of the support block 36 fixed above, the guide member 13 contacts the outer circumferential surface of the abutment shaft 35 in the process of retreating from the forward end indicated by the two-dot chain line in FIG. An operating rod 37 for rotating the guide member 13 in the forward direction is provided so as to project in the forward direction of the guide member 13.
The knock pin 30 is attached to the tool cartridges 22a, 22.
The length of the operating rod 37 is set so that it can completely come out of the engagement hole 28 of b.

When exchanging tools in the machine tool configured as described above, first, the guide member 13 is located at the retreat end, and the tool cartridges 22a and 22b, which are attached to the main spindle 7 and to which the used tools are to be returned, are placed on the guide member 13. a tool cartridge 22a, in which the used tool should be returned by determining whether the tool is on the top, and if not, operating the cylinder device 27;
22b is carried into the guide member 13. In this case, the guide member 13 is located at the rearward end, and the operating rod 37 abuts against the abutment shaft 35, causing the rotation lever 3
1 is rotated clockwise, the knock pin 30 is completely disengaged from the engagement hole 28 of the tool cartridges 22a, 22b, and the guide grooves 13a, 21a, 21b of the tool cartridges 22a, 22b are rotated clockwise.
Movement along the line is performed smoothly.

Thereafter, by combining the movement of the slide table 4 and the vertical movement of the lifting table 5, the used tool is returned to a predetermined position on the tool cartridges 22a, 22b by the forward movement of the guide member 13. After the spindle head 6 is positioned at this position, the guide member 13 is moved forward by operating the cylinder device 18, and the used tools are returned to the tool cartridges 22a, 22b on the guide member 13. When the guide member 13 moves forward, the rotation lever 31 turns counterclockwise due to the tension of the spring 33, so that the knock pin 30 locks the tool cartridge on the guide member 13 immediately after the guide member 13 starts moving from the backward end. The tool cartridges 22a, 22b are fitted into engagement holes 28 formed in the tool cartridges 22a, 22b, thereby preventing the tool cartridges 22a, 22b from moving laterally during the tool return operation. Therefore, when returning the tool, the used tool is stored in the tool cartridge 22a, 2.
Accidents such as the tool not being returned due to interference with the tool gripping device 24 of 2b are prevented.

When the used tool is returned in this way, a new tool is attached to the spindle 7 in almost the same cycle, but in this case as well, the guide member 13
When the tool cartridge 2 is located at the backward end,
2a, 22b are allowed to move in the horizontal direction, and in the process of moving the guide member 13 to the forward end, which is the tool exchange position, the horizontal movement of the tool holding members 22a, 22b is restricted, preventing the insertion of a new tool into the spindle 7. will be carried out smoothly and reliably.

As described above, in the tool selection device of the present invention, a rotary lever is provided on the guide member, which extends in a direction intersecting the direction of movement of the guide member and is pivotable in a plane parallel to the direction of movement of the guide member. A spring is provided for pivotally supporting the rotary lever, locking a positioning member such as a dowel pin at one end of the rotary lever, and pivoting the rotary lever in a direction in which the positioning member engages a tool cartridge on the guide member; Since the fixed part is provided with an operating member that engages with the other end of the rotary lever and rotates the rotary lever in the opposite direction when the guide member is positioned at the backward end, the movement of the guide member back and forth can be utilized. The positioning member can be engaged with and removed from the tool cartridge, there is no need to provide a special drive source for advancing and retracting the positioning member, and the control circuit can be simplified.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a side view of a machine tool equipped with a tool storage device according to the present invention, FIG. 2 is a partial view taken from the direction shown in FIG. FIG. 3 is a cross-sectional view taken along the - line in FIG. 1. 11... Tool storage device, 13... Guide member, 1
5...Support bar, 16...Guide roller, 17...
...Reinforcement plate, 18...Cylinder device, 20a, 20
b... Fixed guide member, 22a, 22b... Tool cartridge, 28... Engagement hole, 30... Knock pin, 31... Rotating lever, 33... Spring,
35...Abutment shaft, 37...Operation rod.

Claims (1)

[Scope of utility model registration request] It has a guide member that moves back and forth between a forward end position where tools are exchanged and a backward end position that is a certain distance backward from the forward end position, and in a state where the guide member is located at the backward end, each of the plurality of In the tool storage device, one of a plurality of tool cartridges holding tools is carried onto the guide member and moved to the tool exchange position by moving in a direction intersecting the advance/retreat direction of the guide member. A positioning member is disposed on the guide member and is movable in a direction parallel to the advancing and retracting direction of the guide member and can be engaged with a positioning engagement portion bored in the tool cartridge at the advanced end position, and A rotary lever that is rotatable in a plane parallel to the direction in which the member advances and retreats, and one of the two ends that sandwich the pivot shaft is locked to the positioning member, is placed on the guide member in a direction substantially perpendicular to the direction in which the guide member advances and retreats. further provided with an elastic member that applies a turning force to the rotating lever in a predetermined direction such that the positioning member engages with the engaging portion of the tool cartridge; During the retreat of the guide member, the pivot of the rotary lever is held between the two ends, and the pivot lever is engaged with the other end opposite to the one end, and the rotary lever is moved in the opposite direction from the predetermined direction until the positioning member is disengaged from the engaging portion. 1. A tool storage device, characterized in that an operating member for turning in a direction is fixedly installed.