JPH0735719Y2 - Work transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a work transfer device, and can be used, for example, as a device for transferring a workpiece to be processed to a processing device such as a machine tool.

[Conventional technology]

Prior to machining a complex workpiece to be machined at a machining station, the conventional workpiece conveyor uses a transfer device to clamp the workpiece on the pallet at the mounting station as a preparation. Was being transported to the processing station.

[Problems to be solved by the device]

When a pallet is used as in the workpiece transfer device, a pallet is required, and in addition, a jig for fixing the work is required on the pallet. The work is transferred by the transfer device and the work is unfixed. There is also a problem that a pallet return device for returning empty pallets is required.

An object of the present invention is to provide a workpiece transfer device capable of transferring a work from a mounting station to a processing station or from a processing station to a next processing station without using a conventional pallet.

[Means for Solving the Problems]

The work transfer apparatus of the present invention is a work transfer apparatus for moving a work by moving between at least two stations, and a passage portion provided between the stations and a movement movably supported in the passage portion. A base portion, a swinging arm supported by the moving base portion so as to be swingable about an axis parallel to the passage portion, and a movement drive portion that reciprocates the moving base portion along the passage portion between the stations, A guided portion provided at one end of the swing arm, a work holding portion provided at the other end of the swing arm for detachably holding a work by swinging of the swing arm, and a parallel portion with the passage portion. Forward guides and return guides that are slidably guided to guide the guided portion of the swing arm, and both ends of the forward guides and return guides are provided to move both of the moving bases. In, the first and second engaging portions that engage with the guided portion of the swing arm, and the first and second engaging portions are selectively positioned at positions that match the forward guide and the backward guide. It consists of a rocking device.

[Operation and effect of device]

In the work transfer device of the present invention, at one station, the rocking device is operated to rock the rocking arm to switch the guided portion of the rocking arm from the backward guide to the forward guide. Then, the work is held by the holding unit. Next, the work is moved from one station to another station by moving the table part forward along the passage part while being guided by the outward guide. At another station, the holding of the work by the holding part is released, and the rocking device is operated to switch the guided part from the forward guide to the backward guide. This causes the holding part to separate from the work. Then, by moving the platform while the swing arm is guided by the return guide, the swing arm can be returned to one station without interfering with the work.

According to the workpiece transfer apparatus of the present invention, when a work to be processed is transferred from the attachment station to the processing station or from the processing station to the next processing station, it is not necessary to place it on a pallet and transfer it.

Therefore, it is not necessary to mount or remove the work on the pallet, and the pallet return device for returning the empty pallet is not required, so that the installation space can be reduced and the structure of the machine can be simplified. Further, since the swing arm that conveys the work swings at each guided portion, the work holding portion can be moved toward or away from the work. Since they move in a separated state, interference between the work holding portion and the work can be avoided.

〔Example〕

An embodiment of the work transfer apparatus of the present invention will be described with reference to FIGS.

As shown in FIGS. 1 and 4, a work carrier according to an embodiment of the present invention includes a passage portion 1, a set of forward guides 20 and return guides 21, a base portion 3, a swing arm 4, and a swing arm 4. , First and second rocking devices 50 and 51.

The workpiece transfer apparatus of this embodiment transfers the work 6 between the mounting station A1 and the processing station B1 shown in FIG. 4 by moving the swing arm 4 that holds the work 6 along the passage 1. It is a thing.

The passage portion 1 is a rail-shaped member that is long in the left-right direction in FIG. 4, and guides the moving base portion 30 that supports the swing arm 4 in the left-right direction in FIG. The passage portion 1 is fixed to a mounting member (not shown) at a horizontal position with a constant space therebetween, and upper and lower two first and second guide plates 12 and 13, and first and second guide plates. First and second sliding guide surfaces 120 and 130 formed in the widthwise central portions of the facing surfaces 12 and 13 facing each other, and a pair disposed on both sides of each sliding guide surface 120 and 130. Of the fixed position guide rollers 121, 121 and 131, 131.

As shown in FIG. 1, the fixed position guide rollers 12 of each set.
A long moving base portion 30 that constitutes the base portion 3 is located between the first and the second fixed position guide rollers 131 and 131. As a result, the movable base 30 is guided so as to be movable in the left-right direction in FIG. The moving base 30 is vertically guided and supported by the first and second sliding guide surfaces 120 and 130.

A pair of the outward guide 20 and the return guide 21 are formed in the downward direction of the elongated guide member 2 fixed in a position parallel to the passage portion 1 by a holding member (not shown) and extend in the left-right direction of FIG. It is formed as two grooves having a concave cross section. The forward path guide 20 and the backward path guide 21 slidably guide a moving roller 40 that serves as a guided portion of the swing arm 4 described later. The plurality of guide members 2 are arranged in series in the left-right direction in FIG. 4, and guide spaces 23 and 24 are formed at both ends of each guide member 2 in a direction crossing the forward guide 20 and the backward guide 21. Therefore, both ends of the outward guide 20 and the return guide 21 are communicated with each other by these guide spaces 23 and 24.

As shown in FIGS. 1 and 4, the base portion 3 includes a moving base portion 30 that supports the swing arm 4 via a central shaft 31, and a moving base portion 30.
And a drive unit 32 for moving along the passage 1.

The moving base 30 includes a first holding plate 300 having a U-shaped cross-section that is guided by the passage portion 1 and has a long shape, and a plurality of fixed first holding plates 300 that are fixed to the first holding plate 300 at intervals in the lengthwise direction. Second holding plate 304
Consists of. The upper and lower horizontal walls 301 and 303 of the first holding plate 300 are
The upper and lower horizontal walls 301 and 303 are slidably guided by the first and second sliding guide surfaces 120 and 130 of the passage portion 1, and both end surfaces of both ends of the upper and lower horizontal walls 301 and 303 are fixed position guide rollers 121, 121 and 131, respectively. Guided by 131. Also, the vertical wall between the upper and lower horizontal walls 301 and 303.
As shown in FIG. 1, a second holding plate 304 is fixed to the 302 with screws and is engaged and recessed. A pair of vertical walls 306 for fixing and holding the central shaft 31 are attached to both ends of the second holding plate 304 so as to extend in the horizontal direction. Each of the pair of vertical walls 306 has an axial hole 306a as shown in FIG. 4, and a short pipe-shaped guide cylinder 306b is coaxially formed with the axial hole 306a on the surface facing the pair of vertical walls 306. It is fixed.

The movement drive unit 32 is a cylinder body fixed to a base (not shown).
320, and a piston shaft 321 held in the cylinder body 320 so as to be capable of reciprocating. One end of the piston shaft 321 is connected to one end of the first holding plate 300 of the moving base 30.

As shown in FIGS. 1 and 4, the swing arm 4 has a moving roller 40 as a guided portion at one end and two work holding members 41 at the other end, and the platform is provided between the one end and the other end. It has a swinging cylinder portion 42 slidably inserted and held with the central shaft 31 of the portion 3. The moving roller 40 can be interlocked with the first swinging device 50 at the position of the guide space portion 23 of the mounting station A1 shown in FIG.
Further, the second swinging device 51 can be engaged with the second swinging device 51 at the position of the guide space 24 of the processing station B1.

Each work holding portion 41 holds the work 6 by the engaging claws 416.
It is gripped from the inside, and the engaging claw 416 is operated by the clamp drive unit 45. That is, as shown in FIG. 2 and FIG.
Has a cylindrical portion 41 inserted into the attachment hole 60 of the work 6 at its tip.
Have two. An operating rod 413 is swingably housed in the cylindrical portion 412. This clamp drive unit 45 is
By swinging the operating rod 413, the engaging claw 146 is advanced and retracted by a wedge engagement described later. That is, the wedge engagements are arranged at equal angular intervals in the circumferential direction of the operating rod 413, and the three wedge members 414 swingable in the axial direction of the operating rod 413, the wedge members 414, It is composed of a spring 415 compressed between the rod 413 and the rod 413. When the slant surface of the wedge member 414 engages with the slant surface at the end of the engaging claw 146, the wedge member 414 slides via the spring 415 due to the sliding of the operating rod 413.
Moves in the radial direction of the operating rod 413 to grip the work 6.

Further, as shown in FIG. 1, a swing lever 420 rotatably supported by a support shaft S is provided at one end of the operating rod 413.
One end 421 is engaged. Further, as shown in FIGS. 1 and 4, a transmission member 430 for transmitting the driving force of the clamp driving portion 45 is engaged with the other end 422 side of the swing lever 420. The clamp drive unit 45 includes a piston shaft 451 and a cylinder body 450 that holds the piston shaft 451 in a reciprocating manner.
Consists of. The transmission member 430 is pivotally supported at the tip of the piston shaft 451 by a pin 451a so as to be swingable. Also the piston shaft
A swing restricting member 440 is fixed to the tip of the 451. An adjusting bolt 440a and a fixing nut 440b that restrict the swing of the transmission member 430 are attached to both ends of the swing restricting member 440.

As shown in FIGS. 1 and 4, the first and second rocking devices 5
0 and 51 are cylinder bodies 5 fixed to a mounting portion (not shown)
00 and 510, and piston shafts 501 and 511 held by cylinder bodies 500 and 510 so as to be capable of reciprocating. Engaging grooves 502a and 512a having the same cross-sectional shape as the forward guide 20 or the backward guide 21 are formed at the tips of the piston shafts 501 and 511.
Engaging portions 502 and 512 having the above are continuously provided at both ends of the forward guide 20 and the backward guide 21. The engaging portions 502 and 512 are engaged grooves.
The guide rollers 20 are arranged in the guide space portions 23 and 24 of the forward guide 20 and the backward guide 21 so as to be movable while the moving rollers 40 are engaged with the moving guides 502a and 512a. Therefore, the engaging portions 502 and 512 can guide the moving roller 40 from one of the forward guide 20 and the backward guide 21 to the other in conjunction with the advance and retreat of the piston shafts 501 and 511.

At the mounting station A1 shown in FIG. 4, a clamping device 7 for clamping the workpiece 6 at a fixed position is installed as shown in FIG. The clamp device 7 is a work receiving jig 70 that is held by a base (not shown) and receives the work 6.
A work holding jig 71 for clamping the work 6 on the work receiving jig 70, work guide members 72, 73, 74 for holding the work 6 at the work receiving jig 70 position, and a work holding jig 71.
And a jig driving section 75 for driving the. Jig drive
75 is a cylinder body 750 fixed to a base not shown,
A piston shaft 751 is held by the cylinder body 750 so as to be capable of reciprocating and one end of which is connected to the work holding jig 71.

Further, the processing station B1 shown in FIG. 4 is provided with a positioning device 8 for positioning the workpiece 6 conveyed by the swing arm 4 at the processing reference position as shown in FIG. The positioning device 8 is provided with a positioning device 8 for positioning the work 6 at a machining reference position. The positioning device 8 has a holding member 80 having a holding hole 800 for holding the work 6 in a fixed position, and the holding hole 80 for the work 6 held by the swing arm 4 with the positioning member 80.
A drive unit 81 for moving and approaching in the axial direction of 0 is installed. The drive unit 81 includes a cylinder body 810 fixed to a base (not shown), and a piston shaft 811 which is reciprocally held by the cylinder body 810 and has one end connected to the positioning member 80.

The case where the workpiece 6 is transferred from the station A1 to the processing station B1 by the workpiece transfer apparatus of the present embodiment is
This will be described with reference to FIG. 4, FIG. 4 and FIG.

An unprocessed work 6 is received by a work receiving jig 70 at a mounting station A1 position shown in FIG. Then, by driving the jig driving unit 75, the work holding jig 71 abuts and presses the work 6, and the work 6 is clamped at a fixed position. When the first rocking device 50 is driven to advance the piston shaft 501 at this mounting station A1 position, the engaging portion 502 moves in the guide space portion 23 and the rocking arm 4 is moved.
The moving roller 40 at one end of the moving roller 40 is moved from the backward guide 21 side to the forward guide 20 side (first movement of the moving roller 40). Then, the swing arm 4 swings counterclockwise around the swing tube portion 42 as the swing center to insert the work holding portion 41 into the mounting hole 60 of the work 4. In this state, when the clamp driving unit 45 is driven and the piston shaft 451 is advanced, this acting force is
The actuating rod 413 is moved in the axial direction through the swinging restricting member 440, the transmission member 430, and the swinging lever 420. As shown in FIG. 2, the operating rod 413 moves the wedge member 414 forward against the urging force of the spring 415, and the engaging claw 416 advances in the radial direction of the mounting hole 60 of the work 6 to mount the mounting hole. It abuts and engages with the inner peripheral portion of 60. As a result, the mounting hole 60 for the workpiece 6
Are clamped to the work holding portion 41 of the swing arm 4.
In this state, the jig drive unit 75 in FIG. 5 is driven to drive the piston shaft.
751 is retracted, the work pressing jig 71 is moved in the vertical direction to be separated from the work 6, and the work 6 is clamped to the work receiving jig 70. After this, the movement drive unit 32 of FIG. 4 is driven to retract the piston shaft 321 and interlock the movement base 30 of the base 3. Then the moving base 30
Is guided by the passage portion 1 and moves along with the swing arm 4 to the fourth
Processing station B1 from the position of mounting station A1 in the figure
Move to the position. At this time, the moving roller 40 at one end of the swinging arm 4 moves the forward path guide 20 from the engaging groove 502a of the first swinging device 50 and is positioned in the engaging groove 512a of the second swinging device 51 (moving roller Second move of 40). Also swing arm 4
The work holding portion 41 at the other end of the position is located on the same axis as the holding hole 800 of the positioning member 80 in FIG. 1 while holding the work 6. Next, the drive unit 81 is driven and the piston shaft 811
When is advanced, the positioning member 80 interlocked with this moves toward the direction of approaching the work 6. As a result, the outer peripheral portion of the work 6 is inserted into the holding hole 800 of the positioning member 80. After that, when the clamp driving unit 45 of the swing arm 4 is driven, the operating rod 413 moves in a direction away from the work 6, and the engaging claw 416 in FIG. 2 separates from the inner peripheral surface of the work 6. . In this state, the workpiece fixing jig device (not shown) is driven to press and clamp the workpiece 6 from the direction of the swing arm 4 to the position member 80 shown in FIG. Subsequently, the second rocking device 51 is driven to retract the piston shaft 511. Then, the engaging portion 512 switches the position of the moving roller 40 at one end of the swing arm 4 from the forward guide 20 side to the backward guide 21 side (third movement of the moving roller 40). As a result, the swing arm 4 swings clockwise around the swing tube portion 42. Along with this, the work holding member 41 of the swing arm 4 is disengaged from the mounting hole 60 of the work 6 shown in FIG. Then, the movement drive unit 32 shown in FIG. 4 is driven, the piston shaft 321 is advanced, and the base unit 3 is moved.
When the moving base portion 30 of FIG. 5 is interlocked, the moving base portion 30 is moved by being guided by the passage portion 1, and the swing arm 4 is moved from the position of the processing station B1 shown in FIG. 4 to the mounting station shown in FIG.
Return to position A1. At this time, the moving roller 40 at one end of the swing arm 4 is guided by the engaging groove 512a of the second swing device 51 from the return path guide.
21 is moved to be positioned in the engaging groove 502a of the first swinging device 50 and is in the initial state (fourth movement of the moving roller 40). Similar swing arms (not shown) are attached to the left side of FIG. 4 at each reciprocating pitch of the base portion 3, and the workpiece 6 machined at the machining station by the swing arms has the same operation as described above. It is conveyed to the next processing station by operation. This transfer is performed simultaneously with the transfer by the swing arm 4 on the right side in FIG.

As described above, according to the work transfer apparatus of the present embodiment, the swing arm 4 is swung at the mounting station A1 and the swing arm 4 is moved.
When the moving roller 40 of is moved from the backward guide 21 to the forward guide 20, the swinging of the swinging arm 4 is used to make the work holding portion 41.
Can be moved toward or away from the work 6. Further, by moving the moving base portion 30 of the base portion 3 forward along the passage portion 1, the moving roller 40 of the swing arm 4 is guided by the forward guide 20 to move the swing arm 4 and the work 6 to the processing station B1. Can be transported. Furthermore, from the processing station B1 of the swing arm 6 to the mounting station
The movement to A1 and the clamping and unclamping of the work 6 of the work holding portion 41 of the swing arm 4 can be automatically performed. Therefore, it is not necessary to provide a jig for fixing the work on the pallet and a pallet return device as compared with the conventional type in which the work is placed on the pallet and conveyed.

[Brief description of drawings]

1 to 6 are drawings showing a comparative example of the present invention. FIG. 1 is a vertical cross-sectional view showing an operating state of essential parts. FIG. 2 is a partially enlarged vertical sectional view showing the work holding portion. FIG. 3 is a sectional view taken along the line AA in FIG. FIG. 4 is a front view in which a part is longitudinally cut. FIG. 5 is a vertical cross-sectional view showing the operating state of the main parts of the mounting station. Sixth
FIG. 1 is a perspective view showing a main part in FIG. 1 ... passage part, 3 ... stand part 4 ... swing arm, 5 ... swing device 6 ... work 20 ... return guide, 21 ... return guide

Claims (1)

[Scope of utility model registration request] 1. A workpiece transfer apparatus for transferring a work by moving between at least two stations, a passage portion provided between the stations, and a moving base portion movably supported in the passage portion. A swing arm supported by a moving base so as to be swingable around an axis parallel to the passage, a movement drive unit that reciprocates the movement base between the stations along the passage, and the swing arm. A guided part provided at one end of the rocking arm, a work holding part that is held at the other end of the rocking arm so as to detachably hold the work by rocking of the rocking arm, and arranged in parallel with the passage part. A forward guide and a backward guide that slidably guide the guided portion of the swing arm, and the forward guide and the backward guide, which are disposed at both ends of the forward guide and the backward guide, respectively, at both moving ends of the moving base. First and second engaging portions that engage with the guided portion of the moving arm, and an oscillating device that selectively positions the first and second engaging portions at a position aligned with the forward guide and the backward guide. A workpiece transfer device consisting of.