JPH0537435U - Work feeder - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a work feeder that can reduce the width of the feeder, has low pallet vibration, and has a simple structure. [Structure] There are two rows of vertical feed paths 3a and 3b that vertically feed a plurality of pallets 2 for placing work pieces, and the pallet 2 is laterally provided at the end of the path between these vertical feed paths 3a and 3b. A pallet feed base 1 that can be fed freely is provided. An empty space Q for one pallet is provided on the pallet feed table 1 so that the pallets 2 are densely placed. Both vertical feed paths 3a and 3b, and a horizontal feed path 4 between both ends of these vertical feed paths 3a and 3b.
A pallet sequential feeding device 9, 11, 13, 15 for pushing and moving the pallet 2 of each path from the rear end of the array is provided on a and 4b.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a work feeder that supplies a work to a machine tool such as a lathe.

[0002]

[Prior Art]

 Conventionally, in machine tools such as turret lathes, a rotary work feeder has been provided that circulates a pallet on which a work is placed along a predetermined circulation path on a rotary table. It is being supplied.

FIG. 5 and FIG. 6 respectively show a front view and a plan view of a turret lathe 31 that employs such a conventional rotary work feeder 21 as a work transfer device. On the rotary table 22 of the rotary work feeder 21, a plurality of pallets 26 connected to an endless chain 25 wound between a pair of sprockets 23 and 24 orbits, and a work W is positioned on each pallet 26. Placed.

According to the rotary work feeder 21, the work W is placed on the pallet 26 at the work supply position P1. When the pallet 26 on which the work W has been positioned reaches the work transfer position P2 while rotating around a predetermined pitch, the gantry loader 32 of the turret lathe 31 grips the work W.

In the gantry loader 32, a forward / backward moving base 35 is installed on a traveling body 34 installed on a rail 33, and a loader head 37 is provided at a lower end of a lifting rod 36 supported by the forward / backward moving base 35. The loader head 37 moves in three orthogonal directions by the movement of the traveling body 34, the front-rear moving table 35, and the elevating rod 36. The loader head 37 is provided with two loader chucks 38 on the surface facing the main shaft 39 and the lower surface, and the positions of both loader chucks 38 can be exchanged by a turning mechanism (not shown).

The gantry loader 32 holding the work W supplies it to the spindle 39 of the turret lathe 31. The work W processed by the turret 40 of the turret lathe 31 is again gripped by the gantry loader 32 and conveyed to the product conveyor 41.

[0007]

[Problems to be solved by the device]

 However, in the conventional rotary work feeder 21 described above, since the pallet 26 is connected to the endless chain 25 wound between the sprockets 23 and 24 to move the pallet 26 in the orbit, the following problems occur. there were. (a) The width of the pallet 26, which is the length of the two rows of vertical feed, plus the diameters of the sprockets 23 and 24, is the machine width, which increases the machine width and increases the size of the machine. .. (b) Since the sprockets 23 and 24 basically perform a polygonal motion, when the pallet 26 is drawn around the sprockets 23 and 24 and passes, the pallet 26 vibrates and the position of the work W is increased. A gap may occur. (c) It is difficult to set the tension of the endless chain 25.

An object of the present invention is to provide a work feeder in which the width of the feeder can be reduced, the vibration of the pallet is low, and the structure is simple.

[0009]

[Means for Solving the Problems]

 The rotary work feeder of the present invention has two rows of vertical feed paths for vertically supporting a plurality of pallets for placing workpieces, and the pallet can be fed horizontally at the end of the path between these vertical feed paths. It is configured with a pallet feed table. An empty space for one pallet is provided on the pallet feed table so that the pallets are densely placed, and the pallets for each route are arranged in both the vertical feed routes and the horizontal feed route between both ends of these vertical feed routes. A pallet feeding device that pushes and moves from the rear end is provided.

[0010]

[Action]

 In the vertical feed path or horizontal feed path in which an empty space is formed on the pallet feed table, the pallet sequential feed device pushes the pallet array from the rear end to move one pallet. By repeating such an operation in the order of the vertical feed route, the horizontal feed route, the vertical feed route, and the horizontal feed route, each pallet can be moved in a circle.

[0011]

【Example】

 An embodiment of the present invention will be described with reference to FIGS. As shown in the plan view of FIG. 1, two rows of vertical feed paths 3a and 3b for vertically feeding a plurality of rectangular or square pallets 2 for placing a work are provided on the pallet feed table 1. They are installed side by side. The longitudinal feed paths 3a and 3b are connected at their ends by lateral feed paths 4a and 4b perpendicular to the vertical feed paths 3a and 3b, respectively, so that a rectangular circulation path is formed as a whole.

In the vertical feed paths 3a and 3b on the pallet feed base 1, as shown in FIG. 2, rollers 5 oriented in the vertical feed direction are arranged side by side at a narrower interval than the width dimension of the pallet 2. The pallet 2 placed on the 5 can be vertically fed. At the four corners of the circulation path, balls 6 are provided in place of the rollers 5 as shown in FIG. 3 to smoothly move the pallet 2 from vertical feed to horizontal feed and from horizontal feed to vertical feed. It is designed to be able to change direction.

A flange 7 is provided at the periphery of the pallet feed table 1 and at the boundary between the two vertical feed paths 3a and 3b to sandwich the pallet 2 with the roller 5 and to prevent the pallet 2 from vertically swinging. ing. Further, as shown in FIG. 2 and FIG. 3, sliding members 8 having a low friction coefficient which are smoothly slidably contacted with the side portions of the pallet 2 are attached to the side walls of the vertical feed paths 3a and 3b and the horizontal feed paths 4a and 4b. There is.

A plurality of pallets 2 are densely arranged in the circuit path, leaving an empty space Q for one pallet. That is, when a plurality of pallets 2 are densely arranged in each of the vertical feed paths 3a and 3b, one pallet 2 located at each end of the vertical feed paths 3a and 3b is transferred to the horizontal feed paths 4a and 4b. The length is set so that it can be moved laterally.

A first air cylinder 9 which is a pallet progressive feeding device for pushing the pallets 2 arranged on the path 3a from the rear end and feeding the pallets vertically in the direction of arrow A is provided at one end of one vertical feed path 3a. The air cylinder 9 is provided with a pushing member 10 at the tip end of the piston rod 9a which is pushed against the pallet 2.

Similarly, at the rear end of the horizontal feed path 4a which is continuous with the rear end of the vertical feed path 3a, the pallets 2 arranged in the horizontal feed path 4a are pushed from the rear end thereof in the direction of arrow B. A second air cylinder 11 which is a drive source for laterally feeding the pallet 2 is provided at the tip of the piston rod 11a.

Similarly, at the rear end of the vertical feed path 3b, a third air cylinder 13 which is a progressive feed device for pushing the pallet 2 from the rear end to feed the pallet 2 vertically in the direction of arrow C is arranged, and its piston rod 13a is arranged. A pushing member 14 is provided at the tip.

Further, a fourth air cylinder 15 for pushing the pallet 2 from the rear end thereof to laterally feed it in the direction of the arrow D is also arranged at the rear end of the lateral feed path 4b, and a pushing member is provided at the tip of the piston rod 15a. 16 are provided. That is, the pallet 2 on the circulating path is circulated by the air cylinders 9, 11, 13, 15 in the counterclockwise direction of the arrows A, D, C, B.

Next, the operation when the above work feeder is used as a work supply device of a turret lathe will be described with reference to FIG. As shown in FIG. 4 (A), the air cylinder 9 is first driven forward / backward as shown in FIG. 4 (B) under the condition that there is a vacant portion Q in the upper right corner of the orbit path, and the vertical feed path 3a The rows of the pallet 2 are vertically fed in the direction of arrow A. When the pallet 2 at the front end moves to the upper right corner of the circular route, a vacant place Q is formed in the lower right corner of the circular route.

Next, as shown in FIG. 4 (C), the air cylinder 11 is driven forward and backward, and the pallet 2 located at the tip of the vertical feed path 3b, that is, at the lower left corner of the orbit path, passes through the horizontal feed path 4a. Is fed to the lower right corner of the. As a result, an empty place Q is formed in the lower left corner of the circuit route.

Next, as shown in FIG. 4 (D), the air cylinder 13 is driven back and forth, the row of the pallets 2 on the vertical feed path 3b is vertically fed in the direction of the arrow C, and the front end of the pellet 2 is moved. Moves to the lower left corner of the circuitous route, and an empty space Q is formed at the upper left corner of the circuitous route.

Next, as shown in FIG. 4 (E), the air cylinder 15 is driven back and forth, and the pallet 2 located at the tip of the vertical feed path 3a, that is, at the upper right corner of the orbital path, passes through the horizontal feed path 4b and is indicated by the arrow D. It is traversed to the upper left corner of the circuit path in the direction of. As a result, an empty space Q is formed in the upper right corner of the circuit route. In this one-cycle operation, the pallet 2 on the revolving path is revolved counterclockwise by one sheet.

By repeating such a cycle, the work W placed on the pallet 2 at the upper left corner of the orbiting path at the work supply position P1 is vertically fed in the direction of the arrow C in the vertical feeding path 3b to be orbited. The workpiece delivery position P2 at the lower left corner of the route is reached. At this work transfer position P2, the work W on the pallet 2 is transferred to the gantry loader, and the emptied pallet 2 is transferred to the work supply position P1 via the horizontal feed path 4a, the vertical feed path 3a, and the horizontal feed path 4b. And will be collected.

In the above embodiment, the roller 5 and the ball 6 are provided on the pallet feed base 1 side, but the present invention is not limited to this, and the roller or the ball may be provided on the back surface of each pallet 2, for example. ..

[0025]

[Effect of the device]

 The work feeder of the present invention has two rows of vertical feed paths for vertically supporting a plurality of pallets for placing works, and between the vertical feed paths, the pallet can be fed horizontally at the end of the path. A pallet feed table is provided, an empty space for one pallet is provided on this pallet feed table, and the pallets are placed densely on the both vertical feed paths and the horizontal feed path between both ends of these vertical feed paths. Since the pallet feeding device that pushes and moves the pallets on each path from the rear end of the array is installed, the machine width can be reduced to almost the width of two rows of pallets. It is possible to eliminate misalignment. In addition, installation is easy because there is no need for difficult adjustments such as setting the tension of the endless chain.

[Brief description of drawings]

FIG. 1 is a plan view showing the outline of a work feeder according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is an operation explanatory diagram of the work feeder.

FIG. 5 is a front view showing a lathe using a conventional rotary work feeder.

FIG. 6 is a plan view of the lathe.

[Explanation of symbols]

1 ... Pallet feed table, 2 ... Pallet, 3a, 3b ... Vertical feed path, 4a, 4b ... Horizontal feed path, 9, 11, 13, 15 ... Air cylinder (pallet sequential feed device), Q ... Empty location, W
…work

Claims (1)

[Scope of utility model registration request] 1. A pallet feed which has two rows of vertical feed paths for supporting vertically a plurality of pallets for placing a work piece, and between the vertical feed paths, the pallet can be fed laterally at the end of the path. A pedestal is provided, and pallets are vacantly placed on this pallet feed table to place the pallets densely, and the pallets are placed densely on the both vertical feed paths and the horizontal feed path between both ends of these vertical feed paths. Work feeder equipped with a pallet sequential feeding device that pushes and moves pallets from the rear end of the array.