JPS62827Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a guide rail opening/closing device for a magazine for tool exchange.

Conventionally, tool exchange magazines have a structure in which a large number of cartridges holding tools are conveyed by a conveyance chain while being guided on both sides by guide rails, and the cartridges can be taken out at predetermined positions. . That is, a kerf is provided in the cartridge take-out portion of the guide rail, and when the cartridge reaches the kerf position, the rotating arm grips the cartridge, takes it out from the guide rail, and transports it to the tool exchange position.

However, in the above case, when the cartridge passes through the cartridge removal portion of the guide rail, it hits the edge of the kerf and generates noise, and in some cases there is a risk that the cartridge may fall off the guide rail.

The present invention was developed in view of this problem, and consists of dividing the cartridge ejecting portion of the guide rail from the main guide rail, and interlocking this cartridge ejecting portion with an indexing mechanism that positions the tool exchange magazine at regular intervals. By opening and closing the cartridge, you can smoothly remove and guide the cartridge.
In addition to preventing noise and cartridges from falling off,
An object of the present invention is to provide a guide rail opening/closing device for a tool exchange magazine with a simple structure.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings, which are examples thereof.

1 to 3 show a first embodiment of the present invention,
Reference numeral 1 denotes a tool exchange magazine, and the tool exchange magazine 1 is provided with a number of cartridges 2 for holding tools (not shown), and has protrusions 2d fitted with guide rollers protruding from both sides of the cartridges 2. The cartridge 2 is transported by a transport chain 4 while being guided by a guide rail 3. The guide rail 3 has a cartridge take-out portion 3a divided from the main guide rail 3b, and this cartridge take-out portion 3a is separated from the main guide rail 3b.
It can be opened and closed laterally by links 5, 5. A spring 6 is provided between the first links 5 and 5.
The cartridge ejecting portions 3a are urged inwardly by the spring 6. The first links 5, 5 are further connected to the second links 7, 7.
The second links 7, 7 are connected to the lower end of the piston rod 9 of the indexing cylinder 8. The upper end of the piston rod 9 is adapted to engage with an indexing groove 11a of an indexing plate 11 that rotates integrally with the sprocket 10 that drives the conveyance chain 4, and positions the indexing plate 11 at a constant pitch. It is possible.

The cartridge 2 has a holding hole 2a for holding a tool on one side, and a T-shaped engagement groove 2b for engaging with the T-shaped protrusion 12a of the swing arm 12 on the other side. This swing arm 12 is horizontally swingable and is different from the tool exchange magazine 1.
The tool is pivoted to a tool change position forming an angle of 90 degrees, and in this tool change position, the swing arm 12 corresponds directly above the change arm 13, which has tool grips at both ends, and the main shaft 14 of the machine tool.

Here, a method for exchanging tools using the apparatus having the above configuration will be explained. first. When it becomes necessary to replace the old tool mounted on the main shaft 14 with a new tool, the magazine 1 is driven to transport the new tool to be replaced to a position corresponding to the cartridge removal portion 3a of the guide rail 3. During this transportation,
The T-shaped protrusion 12a of the swing arm 12 is positioned on the movement trajectory of the cartridge 2, and the T-shaped protrusion 12a
is engaged with the T-shaped engagement groove 2b of the cartridge 2. At this position, drive the indexing cylinder 8, move the piston rod 9 upward, and insert its tip into the indexing plate 1.
1 to prevent movement of the tool exchange magazine 1. As the piston rod 9 moves upward, the second link 7 and the first link 5
The cartridge take-out portion 3a of the guide rail 3 opens laterally through the guide rail 3, and the cartridge 2 holding the new tool becomes detachable. From this state, the swing arm 12 swings the cartridge 2 holding the new tool to the tool exchange position, and then rotates the exchange arm 13 to grip the new tool on the swing arm 12 and the old tool on the spindle 14. , here, the exchange arm 13 protrudes forward and connects both tools to the swing arm 12 and the main shaft 1.
Extract from 4. Then, the exchange arm 13 is rotated 180 degrees to exchange both tools up and down, and the exchange arm 13 is moved back again to transfer both tools to the rotating arm 12.
and the main shaft 14, and the tool exchange is completed. Thereafter, the rotating arm 12 rotates the cartridge 2 holding the old tool by 90 degrees and installs it into the tool exchange magazine 1 waiting at the original position. and,
By lowering the piston rod 9 of the indexing cylinder 8, the cartridge take-out portion 3a of the guide rail 3 is closed via the links 5 and 7, and the cartridge take-out portion 3a is made continuous with the main guide rail 3b. Therefore, the cartridge 2 after the tool exchange is smoothly transported again by the transport chain 4.

4 to 9 show a second embodiment of the present invention,
Index cylinder 8, sprocket 10, index plate 1
1. Swivel arm 12, exchange arm 13, main shaft 14
The structure and operation are similar to those of the first embodiment.

Similar to the first embodiment, the cartridge 2 has a holding hole for holding a tool on one side, and a T-shaped engagement groove 2b for engaging and disengaging with the swing arm 12 on the other side.
The back part has four protrusions 2d that slidably engage with the guide grooves of the guide rail 17. The cartridge 2 has a holder 15 whose upper and lower surfaces are U-shaped in cross section.
A conveyance chain 16 is integrally provided on the back side of the holder 15.

At the cartridge take-out position of the main guide rail 18, a notch 18a with a cutout on the front side (right side in the figure) is formed as shown in FIG.
is fitted on the outside of this notch 18a and is continuous with the main guide rail 18.

Links 21 and 22 are fixed to the lower ends of the rotation shafts 20 of the cartridge take-out parts 19 and 19, and a connecting rod 23 that connects the links 21 and 22 allows the links 21 and 22 to rotate in opposite rotation directions. move. Therefore, the cartridge ejection portion 19,1
9 open and close each other inwardly and outwardly. A roller 24 is attached to the tip of one of the links 21, and this roller 24 is connected to a cam member 24 attached to the lower end of the piston rod 9 of the indexing cylinder 8.
It is always in contact with the tapered surface 25a of No. 5 and can freely roll on this tapered surface 25a. When the piston rod 9 moves upward, the roller 24 rolls on the tapered surface 25a in the outer circumferential direction (see FIG. 8), and as a result, the links 21, 22
rotates as shown by the dashed line in FIG. Therefore, the cartridge take-out portions 19, 19 connected via the rotation shafts 20, 20 open outward, allowing the cartridge 2 to be taken out.

Note that the configuration other than the above is the same as that of the first embodiment, so the explanation will be omitted.

In both of the above embodiments, the tool exchange magazine 1 is rotated in the vertical direction, and the rotating arm 12 for taking out the cartridge 2 in the magazine 1 is rotated in the horizontal direction. 1 may be rotated horizontally and the carriage may be moved vertically. Furthermore, it goes without saying that the exchange arm 13 for exchanging tools between the rotating arm 12 and the main spindle 14 at the tool exchange position is not limited to that shown in FIG.

As is clear from the above explanation, according to the present invention, the cartridge ejecting portion of the guide rail is divided from the main guide rail, and this cartridge ejecting portion is opened and closed in conjunction with the piston rod of the indexing cylinder. The cartridge take-out part B is opened only when exchanging tools, and the cartridge can be taken out easily, and at other times, the cartridge take-out part is continuous with the main guide rail, and the cartridge can be guided stably. Therefore, no noise is generated when the cartridge passes through the removal section, and there is no risk of the cartridge falling off. Moreover, since the cartridge ejecting part is opened and closed using the movement of the piston rod,
There is no need for a special cylinder for opening and closing the cartridge ejection part, simplifying the structure.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of a machine tool equipped with a first embodiment of a tool changing magazine according to the present invention;
The figure is a partially cutaway side view of this tool exchange magazine, Figure 3 is a perspective view of its main parts, Figure 4 and the following figures show the second embodiment of the present invention, and Figure 4 is the tool exchange magazine. FIG. 5 is a sectional view taken along the line - - of FIG. 4, FIG. 6 is a sectional view taken along the - line of FIG. 4, FIG. FIG. 4 is an enlarged sectional view taken along the - line, and FIG. 9 is an exploded perspective view of the main parts thereof. DESCRIPTION OF SYMBOLS 1... Magazine for tool exchange, 2... Cartridge, 3... Guide rail, 3a, 19... Cartridge removal part, 3b, 18... Main guide rail, 4... Transport chain, 5, 7, 21, 22 …
... Link, 8 ... Index cylinder, 9 ... Piston rod, 11 ... Index plate, 24 ... Roller,
25...Cam member.

Claims (1)

[Scope of utility model registration request] In a tool exchange magazine in which a large number of cartridges holding tools are conveyed by a conveyance chain while being guided on both sides by guide rails, and the cartridges are taken out at a predetermined position, the cartridge take-out portion of the guide rail is used as the main guide. An indexing cylinder is provided that is divided from the rail and positions an indexing plate that rotates in conjunction with the conveyance chain at regular intervals, and when the piston rod of this cylinder moves forward and engages with the indexing groove of the indexing plate. A link mechanism that opens the cartridge ejecting portion of the guide rail laterally and interlocks the piston rod and the cartridge ejecting portion so that the cartridge ejecting portion is continuous with the main guide rail when the piston rod retreats and releases the indexing. A guide rail opening/closing device for a magazine for tool exchange.