JPH0717448U - Gantry loader - Google Patents

Abstract

(57) [Summary] [Purpose] A single gantry loader efficiently delivers work to a parallel two-axis lathe. [Structure] Two sets of chucks 8 are attached to the lower end of the lifting rod 5.
8 is provided around the horizontal axis 6 so as to be swingable. A chuck rotating device 9 for synchronizing and rotating both chuck sets 8 is provided. Each chuck group 8 has two loader chucks 8a and 8b having different phases around the horizontal axis 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a gantry reloader for delivering a work to a parallel biaxial turret lathe or the like.

[0002]

[Prior art]

 Conventionally, as a gantry loader of this type, there is one having a configuration shown in FIG. In this gantry loader, an elevating rod 40 is hung from a traveling platform that travels along an erection rail, and a loader head 41 is provided at the lower end of the elevating rod 40. The loader head 41 has a rotary chuck base 44 provided via a swivel mechanism 43 opened at an angle of 45 degrees at a lower end of a rotary shaft 42 rotatably penetrating the lifting shaft 40. By rotating 180 degrees, the positions of the loader chucks 45a, 45b provided on the two surfaces of the rotary chuck base 44 are switched.

According to this gantry loader, the unprocessed material work W ₀ can be held by the downward loader chuck 45 a, and the processed work W can be received by the forward loader chuck 45 b from, for example, the spindle chuck 46 of the lathe. . After that, by rotating the rotary shaft 42 by 180 degrees, the positions of the two loader chucks 45a and 45b can be exchanged, and the material work W ₀ can be mounted on the spindle chuck 46. The processed work W can be grasped by the loader chuck 45b which is switched to the downward position and carried to the carry-out position.

[0004]

[Problems to be solved by the device]

 However, in the case of the conventional gantry loader described above, even if the same machining is performed on each axis of the parallel two-axis lathe, the workpiece must be delivered for each axis, and the same delivery operation is performed twice. And the cycle time is long.

An object of the present invention is to provide a gantry loader that can efficiently transfer a work to a parallel two-axis lathe.

[0006]

[Means for Solving the Problems]

 The gantry loader of the present invention is provided with two chuck sets at the lower end of the elevating rod so that the chuck sets can be swung about a horizontal axis, and a chuck rotating device for synchronizing and rotating both chuck sets is provided. Each chuck group has two loader chucks having different phases around the horizontal axis.

[0007]

[Action]

 For example, when this gantry loader is used to deliver a workpiece to a parallel twin-spindle lathe, two workpieces should be delivered to each spindle chuck at the same time by associating two chuck sets with two spindle chucks. You can

[0008]

【Example】

An embodiment of the present invention will be described with reference to FIGS. FIG. 2 is a plan view of a processing line in which the gantry loader 1 of this embodiment is used for the parallel twin-spindle lathe 14. In this processing line, the material work W ₀ carried by the work transfer device 18 is processed by the parallel biaxial lathe 14, and the processed work W is returned to the work transfer device 18 and carried out.

The parallel twin-spindle lathe 14 has a pair of main shafts 15 a, 15 a arranged with their axes oriented in the front-rear direction (Z direction) and a pair of tool turrets 16 a, 16 a corresponding to these, arranged on a bed 17. is there. Each spindle 15a has a spindle chuck 15b, and is installed on the spindle stock 15. The tool turret 16a is attached to the turret slide 16 and is movable in the front-rear direction (Z direction) and the left-right direction (X direction).

The work transfer device 18 is configured such that a plurality of pallets 22 connected to an endless chain 21 mounted between a pair of sprockets 19 and 20 are rotated on a rotary table 23. The material work W ₀ is positioned and placed on each pallet 22, and the processed work W carried by the gantry loader 1 is placed on the empty pallet 22. The distance between the forward pallet 22 and the backward pallet 22 of the endless chain 21 in the work transfer device 18 is set to be the same as the installation interval of the pair of spindle chucks 15b, 15b of the parallel twin-spindle lathe 14. ing.

The gantry loader 1 is provided for traveling along a rail 2 which is installed in a section extending from above the parallel twin-spindle lathe 14 to above the work transfer device 18 in the left-right direction (Y direction). That is, in the gantry loader 1, as shown in the side view and the plan view of FIG. 1 (B) and FIG. 2, the front and rear moving table 4 movable in the Z direction is installed on the traveling table 3 traveling on the rail 2. An elevating rod 5 is suspended from the front-rear moving table 4 so as to be able to ascend and descend. A pair of left and right prismatic loader heads 7, 7 that are driven to rotate around a horizontal axis 6 along the X direction are provided at the lower end of the lifting rod 5.

Each loader head 7 is provided with a chuck set 8 having two loader chucks 8 a and 8 b as one set. That is, the two loader chucks 8a and 8b forming each chuck set 8 are attached to the two adjacent surfaces of the loader head 7, and have a 90 ° phase difference. The left and right loader chucks 8a, 8a and 8b, 8b are attached to the same side surface of each loader head 7, and the rotation of the loader head 7 causes the two chuck sets 8 and 8 to rotate in synchronization with each other. Has been done. Further, the installation intervals of the two chuck sets 8 and 8 are set in accordance with the installation intervals of the pair of spindle chucks 15b and 15b of the parallel two-axis lathe 14.

The loader head 7 is rotationally driven by a chuck rotating device 9 built in the lower end of the cylindrical elevating rod 5 as shown in FIG. The chuck rotating device 9 includes a bearing 10 that rotatably supports a horizontal shaft 6 that penetrates the lower end of the elevating rod 5 and is connected to the left and right loader heads 7, 7, and a driven gear fixed to the horizontal shaft 6. 11, a motor 12, and an output gear 13 fixed to an output shaft 12a of the motor 12 and meshing with the driven gear 11.

The works W, W by the gantry loader 1 having the above configuration₀The delivery operation will be described. First, as shown in FIG. 3A, the gantry loader 1 moves above the work transfer positions P1 and P2 of the work transfer device 18, and the loader head 7 descends to a downward position as shown in FIG. 3B. Material work W on the pallet 22, 22 by a certain loader chuck 8a, 8a₀, W₀To hold. Next, the material work W is lifted by raising the loader head 7. ₀ , W₀The gantry loader 1 is moved along the rail 2 to a position where the loader chucks 8b, 8b correspond to the pair of spindle chucks 15b, 15b of the parallel twin-spindle lathe 14 as shown in FIG. 3C.

By rotating the loader head 7 by 90 degrees by driving the chuck rotating device 9, the downward loader chucks 8a and 8a holding the workpieces W ₀ and W ₀ are moved as shown in FIG. 3D. The spindle chucks 15b and 15b are opposed to each other. After that, the loader 1 is moved forward to transfer the material works W ₀ , W ₀ of the loader chucks 8a, 8a to the opposed spindle chucks 15b, 15b.

In the subsequent iterative process, the works W ₀ and W are delivered as shown in FIG. That is, first, as shown in FIG. 4 (A), with the material work W ₀ , W _{0 held} by the downward loader chucks 8 b, 8 b, the machined work W, W of the spindle chucks 15 b, 15 b is turned sideways. Received by the empty loader chucks 8a, 8a. Then, the load of the loader head 7 is rotated upward by 90 degrees by driving the chuck rotating device 9, and the loader chucks 8b, 8b holding the workpiece W ₀ face the spindle chucks 15b, 15b as shown in FIG. 4B. Let In this state, the gantry loader 1 advances to transfer the material works W ₀ , W ₀ to the respective spindle chucks 15b, 15b. After that, the load rotating head 7 is rotated in the opposite direction by 180 degrees by driving the chuck rotating device 9, and the loader chucks 8a, 8a holding the processed work W are directed downward as shown in FIG. 4C.

In this state, the gantry loader 1 travels to the work transfer device 18 and lowers the processed works W, W onto the empty pellets 22, 22. Next, the pallet 22 of the work transfer device 18 is moved, and the new material work W ₀ is received by the empty downward loader chucks 8a, 8a. Such operations are repeated.

According to the gantry loader 1, the works W ₀ and W can be simultaneously delivered to the two spindle chucks 15b and 15b in this manner.

[0019]

[Effect of device]

 The gantry loader of the present invention is provided with two chuck sets at the lower end of the elevating rod so that the chuck sets can be swung about the horizontal axis, and a chuck rotating device for synchronizing and rotating both chuck sets is provided. Has two loader chucks with different phases around the horizontal axis, the workpieces can be delivered to and from the two spindle chucks of the parallel twin-spindle lathe at the same time, which shortens the cycle time. be able to.

[Brief description of drawings]

FIG. 1A is a partially cutaway front view showing a main part of a gantry loader according to an embodiment of the present invention, and FIG. 1B is a side view of the gantry loader.

FIG. 2 is a plan view showing the outline of a processing line using the gantry loader.

FIG. 3 is an explanatory diagram showing a work transfer operation of the gantry loader.

FIG. 4 is an explanatory view showing another work transfer operation of the gantry loader.

FIG. 5 is a partially cutaway side view showing a conventional example.

[Explanation of symbols]

5 ... Lifting rod, 6 ... Horizontal axis, 7 ... Loader head, 8 ... Chuck assembly, 8a, 8b ... Loader chuck, 9 ... Chuck rotating device

Claims (1)

[Scope of utility model registration request] 1. A chuck rotating device is provided at the lower end of an elevating rod so that two chuck sets can be swung about a horizontal axis, and a chuck rotating device for indexing and rotating both chuck sets is provided. A gantry loader having two loader chucks with different phases around the axis.