JP4472244B2 - Transfer feeder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a transfer feeder of a transfer press. More specifically, the present invention relates to a transfer feeder that is characterized by its drive mechanism.
[0002]
[Prior art]
Transfer presses are used to make metal panels for automobiles and the like from raw material plates. A transfer press is a device that arranges multiple presses in series and processes a complex press-shaped product at once by pressing multiple presses (hereinafter referred to as workpieces) sequentially. is there. The transfer press is disclosed in Patent Document 1, for example.
[0003]
[Patent Document 1]
JP-A-3-47639
[0004]
The transfer press includes a plurality of press devices, a transfer feeder, and a mold. The plurality of pressing devices are arranged at predetermined intervals in the front-rear direction. The transfer feeder is a device that sequentially feeds workpieces to the pressing devices arranged in the front and rear, and is set in each pressing device, and is arranged so that a plurality of presses are combed back and forth. The molds are a pair of upper and lower molds for pressing a work, and are installed in this press apparatus. For convenience of explanation, they are referred to as front and rear, left and right, and up and down from the workpiece loading position to the loading position.
[0005]
The transfer feeder includes a two-dimensional operation type transfer feeder and a three-dimensional operation type transfer feeder. The two-dimensional motion type transfer feeder combines movements in two directions, a front-rear direction (hereinafter referred to as a feed direction X) and a vertical direction (hereinafter referred to as a lift direction Y), on an arm portion that holds a workpiece. Move the workpiece to convey it. The three-dimensional motion type transfer feeder has an arm portion for holding a workpiece on a front and rear direction (hereinafter referred to as a feed direction X), a vertical direction (hereinafter referred to as a lift direction Y), and a left and right direction (hereinafter referred to as a clamp direction Z). The work is transported by combining the movements in the three directions.
[0006]
The structure of a conventional two-dimensional motion type transfer feeder will be described with reference to the drawings. FIG. 4 is a perspective view of a conventional two-dimensional motion type transfer feeder.
[0007]
The two-dimensional motion type transfer feeder 310 includes a pair of feed bars 330, a plurality of pairs of work holding mechanisms 320, a set of feed driving mechanisms 340, a pair of lift driving mechanisms 350, and a plurality of pairs of carriers 360.
The feed bar 330 is an integrated rod-like structure, and has a length that allows the workpiece 10 to be conveyed from the transfer position of the transfer press 100 to the discharge position. A pair of left and right feed bars 330 are arranged on the left and right so as to penetrate through the press frames of the series of press devices 100.
The feed drive mechanism 340 is a device that moves the pair of left and right feed bars 330 in the front-rear direction, and is disposed at the front or rear end of the transfer press 100. The feed driving mechanism 340 reciprocates the front or rear end of the feed bar 330 in the feed direction X while supporting the front or rear end of the feed bar 330 so as to be transportable in the lift direction Y.
[0008]
The lift drive mechanism 350 is a device that moves the pair of left and right feed bars 330 in the vertical direction, and is disposed on the feed bar 330. The lift drive mechanism 350 includes a plurality of pairs of lift devices 351 and a pair of lift bars 352. The pair of lift bars 352 are integral rod-shaped guide rods, and are provided on the top of the pair of feed bars 330. The lift device 351 includes a plurality of pairs of counter balances and servo motors, and reciprocates the lift bar 352 in the lift direction Y while restraining the movement in the feed direction X and the movement in the clamping direction Z.
[0009]
The plurality of pairs of carriers 360 are devices that connect the feed bar 330 to the lift bar 352 so as to be movable back and forth. The plurality of pairs of carriers 360 are supported by the lift bar 352 such that the feed direction X is movable. The plurality of pairs of carriers 360 are arranged at a predetermined interval in the front-rear direction of the feed bar 330 and connected to the feed bar 330 by a predetermined mechanism.
[0010]
The plurality of workpiece holding mechanisms 320 are mechanisms that hold the workpiece 10. The work holding mechanism 320 is supported by a plurality of pairs of carriers 360. The work holding mechanism 320 includes a single cross bar 321 and a vacuum chuck 322. The plurality of cross bars 321 are bar-like structures extending in the left-right direction, and both ends thereof are connected to the lower portions of the left and right carriers 360. The vacuum chuck 322 has a vacuum cup and is supported by the cross bar 321 so as to match the shape of the workpiece 10 to be held.
[0011]
[Problems to be solved by the invention]
The transfer press described above conveys a workpiece from one press to the next in one action. The workpiece is conveyed in the feed direction X and the lift direction Y in a single action along a predetermined path. In the structure of a transfer feeder of a conventional transfer press, a set of feed drive mechanisms and a pair of lift drive mechanisms move a pair of feed bars and a plurality of work holding structures supported by the feed bars as a unit. . Therefore, the movement paths in the feed direction X and the lift direction Y of the plurality of workpiece holding mechanisms are all the same, and the predetermined trajectories drawn by the plurality of workpieces are all the same.
However, the size of the mold set in the press may differ from station to station. For example, when the molds have different heights, it is impossible to transport the workpiece from press to press in one action. In this case, in order to convey the workpiece by two actions, it is necessary to provide an idle station between the press and the next press.
Further, since the drive housing 340 is provided, the installation area is large. Therefore, there is a problem that the entire length of the transfer press cannot be shortened.
[0012]
In order to solve the above-described problems, the present invention aims to provide a transfer press transfer feeder capable of manufacturing a transfer press with a small installation area, instead of the transfer transfer for a conventional transfer press.
[0013]
  To achieve the above purposeAccording to the present invention,A transfer feeder capable of sequentially moving a plurality of workpieces in a transfer press,
  A plurality of workpiece holding mechanisms capable of holding workpieces;
  A plurality of pairs of feed drive mechanisms capable of moving each of the plurality of workpiece holding mechanisms in the front-rear direction;
  A plurality of lift drive mechanisms capable of moving each of the plurality of workpiece holding mechanisms in the vertical direction,
  A plurality of pairs of lift drive mechanisms are arranged at predetermined intervals in the front-rear direction in the transfer press with the left and right as a pair,
  A workpiece holding mechanism moved by a pair of lift driving mechanisms and another workpiece holding mechanism moved by another lift driving mechanism arranged immediately before or after the lift driving mechanism alternately hold or release a workpiece at a specific position. Is possible,
  Move the work holding mechanism so that the feed drive mechanism and the lift drive mechanism draw a predetermined locus in synchronization,
  The lift drive mechanism has a linear actuator and a linear guide,
  The linear motion guide is arranged with its longitudinal direction extending in the front-rear direction,
  The linear actuator is arranged so that it can move the linear guide up and down,
  The feed drive mechanism is supported by the linear guide so as to be movable in the longitudinal direction,
  A pair of left and right lift drive mechanisms is used as a first lift drive mechanism pair, and another pair of left and right lift drive mechanisms arranged immediately before or after the first lift drive mechanism pair is used as a second lift drive mechanism pair. The linear motion guide of one lift drive mechanism of the drive mechanism pair is shifted from the linear motion guide of one lift drive mechanism of the second lift drive mechanism pair to the left and right sides, and the other of the first lift drive mechanism pair The linear motion guide of the lift drive mechanism is also shifted from the linear motion guide of the other lift drive mechanism of the second lift drive mechanism pair to the one side of the left and right, thereby causing the linear motion of the first lift drive mechanism pair. With guideSecond lift drive mechanism pairThe linear motion guide has an end portion whose longitudinal position overlaps while being shifted from each other on the left and right sides,
  The work holding mechanism supported by the feed drive mechanism located at the end can grip or release the work at the specific position,
  Each work holding mechanism extends to the left and right so as to be supported by the corresponding pair of left and right linear motion guides via the corresponding feed driving mechanism.A transfer feeder is provided which is characterized by.
[0014]
  With the configuration of the present invention, a plurality of work holding mechanisms can hold a work, a plurality of pairs of feed drive mechanisms move the work holding mechanisms in the front-rear direction, and a plurality of pairs of lift drive mechanisms move the work holding mechanisms in the vertical direction Since the work holding mechanism is moved so that the feed driving mechanism and the lift driving mechanism draw a predetermined locus in synchronization with each other,
  A plurality of pairs of feed drive mechanisms and a plurality of pairs of lift drive mechanisms are synchronously drawn so as to draw a predetermined trajectory in which the work held in the work holding mechanism is a combination of the movement in the front-rear direction and the movement in the left-right direction. Can be transported.
A plurality of pairs of lift drive mechanisms are arranged at predetermined intervals in the front-rear direction in the transfer press with the left and right as a pair,pairThe workpiece holding mechanism moved by the lift drive mechanism and another workpiece holding mechanism moved by another lift drive mechanism arranged immediately before or after the lift drive mechanism can alternately hold or release the workpiece at a specific position. Because
The work holding mechanism that is moved by the pair of lift drive mechanisms can grip or release the work located at a specific position in the transfer press, and further, another pair of lifts arranged immediately before or after the pair of lift drive mechanisms. Another work holding mechanism that the drive mechanism moves can grip or release the work located at that particular position in the transfer press.
  Further, the linear motion guide of the lift drive mechanism is arranged with its longitudinal direction extending in the front-rear direction, the linear motion actuator of the lift drive mechanism is arranged so as to move up and down the linear motion guide, and the feed drive mechanism is The lift guide mechanism is supported by the linear guide so as to be movable in the longitudinal direction, and can move in the vertical direction while the feed drive mechanism is movable in the front-rear direction.
The linear motion guides of the pair of lift drive mechanisms and the linear motion guides of the other pair of lift drive mechanisms arranged immediately before or after the lift drive mechanism have overlapping end portions in the longitudinal direction. A workpiece holding mechanism supported by a feed driving mechanism located at the position can grip or release the workpiece at the specific position;
  A workpiece holding mechanism supported by a feed driving mechanism supported at the ends of linear motion guides of a pair of lift driving mechanisms can grip or release a workpiece located at a specific position in the transfer press, and further, the pair of lifts The workpiece holding mechanism supported by the feed drive mechanism supported at the end portion of the straight path guide of another pair of lift drive mechanisms arranged immediately before or after the drive mechanism is positioned at the specific position in the transfer press. The workpiece to be gripped or released.
[0015]
In the transfer feeder according to the present invention, the lift drive mechanism supports the feed drive mechanism, and the feed drive mechanism supports the work holding mechanism.
With the above-described configuration of the present invention, the lift drive mechanism supports the feed drive mechanism, and the feed drive mechanism supports the work holding mechanism. Therefore, the lift drive mechanism and the feed drive mechanism can form an integrated mechanism.
[0017]
In addition, the transfer feeder according to the present invention has a linear motor as a feed drive mechanism, and the linear motor generates a thrust force in the front-rear direction that can move the work holding mechanism in the front-rear direction.
According to the configuration of the present invention, the linear guide of the feed driving mechanism generates a longitudinal thrust force that can move the workpiece holding mechanism in the front-rear direction, and the feed driving mechanism causes the workpiece holding mechanism to move forward and backward by the thrust force of the linear guide. Can be moved to
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In each figure, common portions are denoted by the same reference numerals, and redundant description is omitted. The embodiment is an example in which the present invention is applied to a two-dimensional operation type transfer feeder for transfer press in which three press devices are interlocked. FIG. 1 is a perspective view of an embodiment of the present invention. FIG. 2 is a partial front sectional view of the embodiment of the present invention. FIG. 3 is a route diagram of workpiece conveyance. In this embodiment, the die position of the press device is the specific position of the workpiece. For convenience of explanation, the workpiece is referred to as a first specific position 200a, a second specific position 200b, and a third specific position 200c in order from the workpiece loading position 210 side. The unloading position 220 is in front of the third specific position 200c.
[0019]
The two-dimensional motion type transfer feeder 110 includes a plurality of work holding mechanisms 120, a plurality of pairs of feed driving mechanisms 130, and a plurality of pairs of lift driving mechanisms 140.
The lift drive mechanism 140 is a device that moves the feed drive mechanism 130 that supports the workpiece holding mechanism 120 in the vertical direction. The plurality of pairs of lift drive mechanisms are arranged with a predetermined interval in the front-rear direction inside the transfer press 100 with the left and right as a pair.
Each of the left and right lift drive mechanisms 140 includes two lift devices 141 and one lift bar 142. The lift bar 142 is an integral rod-shaped guide rod, and is provided with the axial center line in the front-rear direction. The lift device 141 is a vertical actuator and supports two front and rear portions of the lift bar 142. The vertical actuator reciprocates the lift bar 142 in the lift direction Y while restraining the movement in the feed direction X and the horizontal movement.
[0020]
The pair of lift drive mechanisms 140 arranged inside the transfer press 100 are arranged in order from the rear, the first lift drive mechanism 140a, the second lift drive mechanism 140b, the third lift drive mechanism 140c, and the fourth lift drive mechanism. 140d.
The axis of the first lift bar 142a of the first lift drive mechanism 140a is located on the right side of the axis of the second lift bar 142b of the second lift drive mechanism 140b, and the front end of the first lift bar 142a And the rear end portion of the second lift bar 142b overlap each other by a predetermined length L in the front-rear direction.
The axis of the second lift bar 142b of the second lift drive mechanism 140b is located on the left side of the axis of the third lift bar 142c of the third lift drive mechanism 140c, and the front end of the second lift bar 142b The rear end portion of the third lift bar 142c overlaps with a predetermined length L in the front-rear direction.
The axis of the third lift bar 142c of the third lift drive mechanism 140c is located on the right side of the axis of the fourth lift bar 142c of the fourth lift drive mechanism 140d, and the front end of the third lift bar 142c. And the rear end of the fourth lift bar 142d overlap by a predetermined length L in the front-rear direction.
[0021]
The pair of feed drive mechanisms 130 are devices that move the work holding mechanism 120 in the front-rear direction. The one feed driving mechanism 130 includes a linear motor 131 and a carrier 132 and is disposed so as to hang from the lift bar 142 of the lift driving mechanism 140. One carrier 132 is provided in one lift bar. The carrier 132 is supported by the lift bar 142 of the lift drive mechanism 140 so as to be movable in the feed direction X while restraining movement in the lift direction Y and movement in the left-right direction. The linear motor 131 of the feed driving mechanism 130 has a secondary conductor 131r and a stator 131s. The secondary conductor 131r is fixed to the surface of the carrier 132 facing the lift bar 142, the stator 131s is fixed to the surface of the lift bar 142 facing the carrier 132, and the interval between the secondary conductor 131r and the stator 131s is predetermined. To maintain the dimensions of
The first feed drive mechanism 130a is supported by the first lift drive mechanism 140a, the second feed drive mechanism 130b is supported by the second lift drive mechanism 140b, and the third feed drive mechanism 130c is supported by the third lift drive mechanism 140b. Supported by the drive mechanism 140c, the fourth feed drive mechanism 130d is supported by the fourth lift drive mechanism 140d.
[0022]
The plurality of workpiece holding mechanisms 120 are mechanisms that hold the workpiece 10. The one workpiece holding mechanism 120 is supported by a pair of feed driving mechanisms 130 at both ends. One work holding mechanism 120 includes one cross bar 121 and a vacuum chuck 122. The plurality of cross bars 121 are rod-like structures extending in the left-right direction, and both ends thereof are connected to the lower portions of the left and right carriers 132. The vacuum chuck 122 has a vacuum cup and is supported by the cross bar 121 so as to match the shape of the workpiece 10 to be held.
The first workpiece holding mechanism 120a is supported by the first feed driving mechanism 130a, the second workpiece holding mechanism 120b is supported by the second feed driving mechanism 130b, and the third workpiece holding mechanism 120c is supported by the third feed. Supported by the drive mechanism 130c, the fourth work holding mechanism 120d is supported by the fourth feed drive mechanism 130d.
[0023]
The first work holding mechanism 120a supported by the first feed drive mechanism 130a located at the front end of the first lift bar 142a can open the work 10 to the first specific position 200a, and the second lift bar The second workpiece holding mechanism 120b supported by the second feed driving mechanism 130b located at the rear end portion of 142b can grip the workpiece 10 at the first specific position 200a.
The first work holding mechanism 120b supported by the second feed drive mechanism 130b located at the front end of the second lift bar 142b can open the work 10 to the second specific position 200b, and the third lift bar The third work holding mechanism 120c supported by the third feed driving mechanism 130c located at the rear end of 142c can grip the work at the second specific position 200b.
The third work holding mechanism 120c supported by the third feed drive mechanism 130c located at the front end of the third lift bar 142c can open the work 10 to the third specific position 200c, and the fourth lift bar The fourth work holding mechanism 120d supported by the fourth feed driving mechanism 130d located at the rear end of 142d can grip the work 10 at the third specific position 200c.
[0024]
Next, the operation of the feed driving mechanism of the two-dimensional operation type transfer feeder will be described.
When a moving magnetic field is generated in the stator 141s of the linear motor 141, a thrust force is generated between the stator 141s and the secondary conductor 141r. The secondary conductor 141 r is moved by the thrust force, and the carrier 142 is moved in the feed direction X along the lift bar 152. The pair of left and right linear motors generate 2 × S thrust force, move the carrier 132 and the workpiece holding mechanism 120, and convey the workpiece 10.
[0025]
A work transfer procedure in one action of the two-dimensional motion type transfer feeder 110 of the embodiment will be described.
A description will be given from a state in which the slides of the plurality of press devices are raised and the lower mold and the upper mold are opened. The workpiece that has been pressed once is on the lower mold in a state of being detached from the lower mold. The pitch between molds is set to 2H. The feed driving mechanism is stopped so that the workpiece holding mechanism 120 is positioned at an intermediate position between the mold and the mold (hereinafter referred to as a retreat position 230).
The feed driving mechanism 130 moves the work holding mechanism 120 backward while the lift driving mechanism 140 moves the work holding mechanism 120 upward from the retracted position. The lift drive mechanism 140 moves the work holding mechanism 120 downward until the work holding mechanism 120 moves backward by H. The workpiece holding mechanism 120 holds the workpiece 10 by the vacuum chuck 122 and lifts the workpiece 10.
[0026]
The feed driving mechanism 130 moves the work holding mechanism 120 forward while the lift driving mechanism 140 moves the work holding mechanism 120 upward. The lift drive mechanism 140 moves the work holding mechanism 120 downward until the work holding mechanism 120 moves forward by 2H. The work holding mechanism 120 releases the work 10 by the vacuum chuck 122. The workpiece 10 is conveyed forward and placed on the lower lower mold.
The feed driving mechanism 130 moves the work holding mechanism 120 rearward while the lift driving mechanism 140 moves the work holding mechanism 120 upward. By the time the workpiece holding mechanism 120 moves backward by H, the lift drive mechanism 140 moves the workpiece holding mechanism 120 downward and positions it at the retreat position 230.
By performing this procedure once, one action of transferring the workpiece from the press to the next press is completed.
When the workpiece is set on the lower mold, the press cylinder press-molds the workpiece 10. Sequentially, the action is repeated according to the press of the press device, and the workpiece 10 is conveyed forward.
[0027]
Paying attention to the state of conveyance of one workpiece, the conveyance and pressing procedures will be described.
First, the workpiece 10 is at the loading position 210. In the first action, the first work holding mechanism 120a conveys the work from the carry-in position 210 to the first specific position 200a. The workpiece 10 is subjected to the first press work at the first specific position 200a. In the second action, the second work holding mechanism 120b transports the work 10 from the first specific position 200a to the second specific position 200b. The workpiece 10 is subjected to the second press work at the second specific position 200b. In the third action, the third work holding mechanism 120c conveys the work 10 from the second specific position 200b to the third specific position 200c. The workpiece 10 is subjected to the third press work at the third specific position 200c. In the fourth action, the fourth work holding mechanism 120d conveys the work 10 from the third specific position 200c to the carry-out position 220. The workpiece 10 is placed at the unloading position 220 and conveyed to a subsequent process such as an inspection process.
[0028]
If the transfer feeder of the above-described embodiment is used, a small drive mechanism can be arranged in the vicinity of each work holding mechanism, so that a conventional large feed drive mechanism becomes unnecessary, and the entire length of the transfer press can be shortened.
Further, since the individual work holding mechanisms are separately moved in the lift direction by a plurality of pairs of lift drive mechanisms, the lift distance for each of the plurality of work holding mechanisms can be set separately.
Further, since the individual work holding mechanisms are separately moved in the feed direction by a plurality of pairs of feed driving mechanisms, the feed distances for the plurality of work holding mechanisms can be set separately.
Therefore, the movement trajectory of the workpiece can be set for each workpiece holding mechanism. Moreover, the idle station which was conventionally required can be omitted, and the interval between presses can be shortened.
In addition, since the electric motor that generates a small thrust force required for one work holding mechanism can be individually arranged in the feed driving mechanism, the feed driving mechanism can be reduced in size.
Further, since the arrangement of the plurality of drive mechanisms can be devised, a flexible layout is possible.
In addition, since a linear motor is used for the electric motor, it is suitable for a feed drive mechanism that directly operates the work holding mechanism, eliminating the need for a device that converts rotational motion to direct operation, and further reducing the size of the feed drive mechanism. Can be
[0029]
The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the scope of the invention.
The type of the linear motor is not limited, and may be, for example, a synchronous type or an induction type. Further, the arrangement of the secondary conductor and the stator of the linear motor is not limited to the embodiment.
Further, one lift driving mechanism is not limited to having two lift devices, and may have only one lift device.
In addition, the lift device is not limited to a structure that catches the lift bar. For example, the lift device may support the lift bar from below.
The present invention is not limited to application to a two-dimensional motion type transfer feeder, and may be applied to, for example, a three-dimensional motion type transfer feeder.
Further, the pair of lift drive mechanisms is not limited to the structure supporting the pair of feed drive mechanisms, and for example, the pair of lift drive mechanisms may support a plurality of pairs of feed drive mechanisms.
[0030]
【The invention's effect】
As described above, the transfer feeder that can sequentially advance and convey the workpiece in the transfer press according to the present invention has the following effects due to its configuration.
A plurality of pairs of feed drive mechanisms and a plurality of pairs of lift drive mechanisms can be conveyed so as to draw a predetermined trajectory in which the movement in the front-rear direction and the movement in the left-right direction are combined in synchronization with the work held by the work holding mechanism,
The work holding mechanism that is moved by the pair of lift drive mechanisms can grip or release the work located at a specific position in the transfer press, and further, another pair of lifts arranged immediately before or after the pair of lift drive mechanisms. The other work holding mechanism that the drive mechanism moves can grip or release the work located at a specific position in the transfer press, so that the work follows a predetermined trajectory in which the movement in the front-rear direction and the movement in the left-right direction are combined. It is conveyed so as to be drawn, opened to a specific position by a work holding mechanism moved by a pair of lift drive mechanisms, and further conveyed so as to draw a predetermined trajectory in which the movement in the front-rear direction and the movement in the left-right direction are combined, Grip by a workpiece holding mechanism moved by another pair of lift drive mechanisms arranged immediately before or after the pair of lift drive mechanisms It is.
In addition, since the lift drive mechanism and the feed drive mechanism can form an integrated mechanism, the lift drive mechanism and the feed drive mechanism can be combined in a compact manner.
Further, the lift drive mechanism can move in the vertical direction while the feed drive mechanism is movable in the front-rear direction, and is supported by the feed drive mechanism supported by the ends of the linear motion guides of the pair of lift drive mechanisms. Can hold or release a workpiece located at a specific position in the transfer press, and is supported at the end of a straight path guide of another pair of lift drive mechanisms arranged immediately before or after the pair of lift drive mechanisms. The workpiece holding mechanism supported by the feed driving mechanism can grip or release the workpiece located at a specific position in the transfer press, so that the workpiece is a predetermined combination of the movement in the front-rear direction and the movement in the left-right direction. Workpiece holding that is conveyed so as to draw a trajectory and supported by the feed drive mechanism supported by the ends of the linear motion guides of the pair of lift drive mechanisms Depending on the structure, the feed drive mechanism is opened at a specific position in the transfer press and is supported at the end of the straight path guide of another pair of lift drive mechanisms disposed immediately before or after the pair of lift drive mechanisms. The workpiece holding mechanism supported by the robot can be gripped at a specific position in the transfer press and conveyed so as to draw a predetermined trajectory in which the movement in the front-rear direction and the movement in the left-right direction are combined.
Further, since the feed drive mechanism moves the workpiece holding mechanism in the front-rear direction by the thrust force of the linear guide, the feed drive mechanism does not require a rotation / linear motion conversion device.
As described above, it is possible to separately select a combined conveyance path for the movement in the feed direction and the lift direction of each work for each action, and it is possible to realize completely independent motion for each work holding mechanism.
In addition, a workpiece transfer route that requires a high lift amount can be easily realized, and transfer from one press to the next can be performed with a single action, so a transfer press that does not require an idle station can be planned.
Further, it is not always necessary to make the intervals between the press devices equal, and an optimum layout of the press device can be selected.
Therefore, the transfer feeder for transfer press which can manufacture the transfer press with a small installation area can be provided.
[Brief description of the drawings]
FIG. 1 is a perspective view of an embodiment of the present invention.
FIG. 2 is a partial front sectional view of an embodiment of the present invention.
FIG. 3 is a conveyance path diagram of a workpiece in the embodiment of the present invention.
FIG. 4 is a perspective view of a conventional two-dimensional transfer feeder.
[Explanation of symbols]
10 work
100 transfer press
110 Two-dimensional motion type transfer feeder
120 Work holding mechanism
120a First work holding mechanism
120b Second work holding mechanism
120c Third work holding mechanism
120d Fourth work holding mechanism
121 crossbar
122 vacuum chuck
130 Feed Drive Mechanism
130a First feed holding mechanism
130b Second feed holding mechanism
130c Third feed holding mechanism
130d Fourth feed holding mechanism
131 linear motor
131r Secondary conductor (rotor)
131s Stator
132 Carrier
140 Lift drive mechanism
140a First lift holding mechanism
140b Second lift holding mechanism
140c Third lift holding mechanism
140d Fourth lift holding mechanism
141 Lifting device
142 Lift Bar
200 Specific position
200a First specific position
200b Second specific position
200c Third specific position
210 Loading position
220 Unloading position
310 Two-dimensional motion type transfer feeder
320 Work holding mechanism
321 Crossbar
322 Vacuum chuck
330 Feed bar
340 Feed drive mechanism
350 Lift drive mechanism
351 Lifting device
352 lift bar
360 career

Claims (3)

A transfer feeder capable of sequentially moving a plurality of workpieces in a transfer press,
A plurality of workpiece holding mechanisms capable of holding workpieces;
A plurality of pairs of feed drive mechanisms capable of moving each of the plurality of workpiece holding mechanisms in the front-rear direction;
A plurality of lift drive mechanisms capable of moving each of the plurality of workpiece holding mechanisms in the vertical direction,
A plurality of pairs of lift drive mechanisms are arranged at predetermined intervals in the front-rear direction in the transfer press with the left and right as a pair,
A workpiece holding mechanism moved by a pair of lift driving mechanisms and another workpiece holding mechanism moved by another lift driving mechanism arranged immediately before or after the lift driving mechanism alternately hold or release a workpiece at a specific position. Is possible,
Move the work holding mechanism so that the feed drive mechanism and the lift drive mechanism draw a predetermined locus in synchronization,
The lift drive mechanism has a linear actuator and a linear guide,
The linear motion guide is arranged with its longitudinal direction extending in the front-rear direction,
The linear actuator is arranged so that it can move the linear guide up and down,
The feed drive mechanism is supported by the linear guide so as to be movable in the longitudinal direction,
A pair of left and right lift drive mechanisms is used as a first lift drive mechanism pair, and another pair of left and right lift drive mechanisms arranged immediately before or after the first lift drive mechanism pair is used as a second lift drive mechanism pair. The linear motion guide of one lift drive mechanism of the drive mechanism pair is shifted from the linear motion guide of one lift drive mechanism of the second lift drive mechanism pair to the left and right sides, and the other of the first lift drive mechanism pair The linear motion guide of the lift drive mechanism is also shifted from the linear motion guide of the other lift drive mechanism of the second lift drive mechanism pair to the one side of the left and right, thereby causing the linear motion of the first lift drive mechanism pair. The guide and the linear motion guide of the second lift drive mechanism pair have ends that overlap with each other in the longitudinal direction while being shifted from each other to the left and right.
The work holding mechanism supported by the feed drive mechanism located at the end can grip or release the work at the specific position,
Each of the work holding mechanisms extends to the left and right so as to be supported by the corresponding pair of left and right linear motion guides via the corresponding feed driving mechanism.   The transfer feeder according to claim 1, wherein the lift drive mechanism supports the feed drive mechanism, and the feed drive mechanism supports the workpiece holding mechanism. Has a linear motor as a feed drive mechanism,
3. The transfer feeder according to claim 1, wherein the linear motor generates a thrust force in the front-rear direction that can move the work holding mechanism in the front-rear direction.

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