JPS6363341B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a workpiece conveyance device that sequentially conveys workpieces between a loading/unloading station and a plurality of processing stations.

This type of workpiece conveyance device is equipped with a workpiece jig equipped with a clamper and a knock pin on an index table facing the loading/unloading station and each processing station, and a rotary valve is installed in the center of the index table to provide a hydraulic power source. The clamper of the workpiece jig facing the loading/unloading station unclamps and the cylinders of each workpiece jig (clamper cylinder, knock pin cylinder), and the clamper of the workpiece jig facing each processing station clamps them. Operated communication devices are known.

However, with this structure, the clamper of the workpiece jig facing each processing station cannot be unclamped, so poorly machined workpieces, erroneous workpieces, etc. cannot be removed and are transported to the next processing station, improving work efficiency. It is bad and has defects.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to provide a workpiece conveyance device that allows the clamper and knock pin of any work jig to be independently clamped, unclamped, and moved in and out of the knock pin. That's true.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view, FIG. 2 is a vertical sectional view, and FIG. 3 is a front view _. B ₂ and B ₃ are provided at 90 degree intervals, and the index table 1 has
Second, third, fourth workpiece jigs 2 ₁ , 2 ₂ , 2 ₃ ,
2 ₄ are provided at 90 degree intervals.

The work jig 2 includes a clamper 4 that is clamped and unclamped by a clamp cylinder 3, and a knock pin 6 that is moved in and out by a knock pin cylinder 5. 4, the workpiece C is clamped and fixed.

A rotary valve 7 is provided at the center of rotation of the index table 1, and around the rotary valve 7 are first, second, third, fourth switching valves 8 ₁ ,
8 ₂ , 8 ₃ , and 8 ₄ are provided to supply pressure oil to each of the clamp cylinders 3 and pin cylinders 5 to control their operations.

The rotary valve 7 includes a piston rod 9 erected and fixed on the fixed side, and a cylindrical housing case 10 rotatably fitted to the piston rod 9,
Housing case 10 is index table 1
The upper large diameter part of the piston rod 9 has first and second ports 12, 13 and an inlet port 1.
4, a drain port 15 is formed, and each port has first, second, and
It is connected and communicated with the third and fourth vertical holes 16, 17, 18, and 19.

First to fourth grooves 2 are provided on the circumferential surface of the piston rod 9.
0, 21, 22, 23 and the first to fourth notches 24,
25, 26, and 27 are formed with intervals in the vertical direction.

The first vertical hole 16 is connected to the first notch 2 in the oil passage 28.
4, the second vertical hole 17 opens to the second notch 25 at the oil passage 29, and the second vertical hole 18 opens to the oil passage 30 and 31.
and 32 open into the second groove 21, the third notch 26, and the fourth groove 23, respectively, and the fourth vertical hole 19
The oil passages 33, 34, and 35 open into the first groove 20, the third groove 22, and the fourth notch 27, respectively.

On the other hand, the first
- First, second, third, and fourth holes 36, 37, 38, and 39 are formed at 90-degree intervals at positions facing the fourth groove and notch, respectively. For convenience of explanation, (1), (2), (3), and (4) are added to each symbol to clarify each hole in the vertical direction.

Each of the switching valves 8 includes a cylindrical body 40 bolted to the flat part 10a of the housing case 10, and a piston 41 rotatably inserted into the cylindrical body 40. The piston 41 is provided with a handle 42. In addition, the boss 43 of the handle 42 and the cylindrical body 40
A positioning mechanism 45 is provided between the holding plate 44 bolted to the upper end surface of the holding plate 44 .

The positioning mechanism 45 includes a ball 47 that is pressed down and held on a boss 43 by a spring 46, and a presser plate 44.
The piston 41 is rotated by the handle ₄₂ to the first, _second , third position, _etc. It is now possible to perform positioning operations.

The cylindrical body 40' of the first switching valve 8 ₁ has first to fourth communication ports 49' ₁ , 49' ₂ to which the first holes 36 ₁ , 36 ₂ , 36 ₃ , 36 ₄ are connected. ,49′ ₃ ,4
9' ₄ are formed with intervals in the vertical direction.

In addition, the first to fourth communication ports 49' ₁ to 49' 4 in the piston 41' are located opposite to the first to fourth communication ports 49' 1 to 49' ₄ .
One side grooves 50' ₁ to 50' ₄ and first to fourth other side grooves 51' ₁ to 51' ₄ are formed, and the first one side groove 50' ₁
and the second other side groove 51' ₂ communicate with each other through the first oil hole 52', and the first other side groove 51' ₁ and the second one side groove 50' ₂ communicate with each other through the first oil hole 52'.
is communicated with the second oil hole 53', and the third first side groove 5
_0'3 is the third oil hole 54' and opens into the fourth other side groove _51'4 , and the third other side groove _51'3 is the fifth oil hole 55' and opens into the fourth one side groove _50'4. It is open to

The first other side concave groove 51' ₁ is connected to the first port 5.
6' ₁ , the second other side concave groove 51' ₂ is the second port 56' ₂
, the third first side groove _50'3 is connected to the third port _56'3 ,
The fourth one-side grooves 50' ₄ open to the fourth ports 56' ₄ , respectively.

The first port _56'1 is connected to the extension chamber _51a of the pin cylinder 51 of the first work jig ₂₁ , the second port _56'2 is connected to the contraction chamber _51b , and the third port _56'2 is connected to the contraction chamber 51b. 56′ ₃
is the first workpiece jig 2 ₁ clamping cylinder 3 ₁
The expansion chamber 3 ₁ a and the fourth port 56' ₄ are the contraction chamber 3 ₁ b.
are connected to each.

The first and second ports 12 and 13 are solenoid valves 60
The inlet port 14 is connected to the pump 61, and the drain port 15 is connected to the tank 62.

Note that the second, third, and fourth switching valves 8 ₂ , 8 ₃ ,
Since 8 ₄ is the same as the first switching valve 8 ₁ , the reference numerals ``'''', ``'', and ``'''' will be added and the explanation will be omitted.

Next, the operation will be explained.

In the illustrated state, the first workpiece jig 2 ₁ is facing the loading/unloading station A, and the second, second, and fourth workpiece jigs 2 ₂ , 2 ₃ , and 2 ₄ are the first, second, and third workpiece jigs. The handle 42 of each switching valve 8 is in the third position in a state facing the processing stations B ₁ , B ₂ , and B ₃ .

If the solenoid valve 60 is set to the first position in this state,
The discharge pressure oil of the pump 61 flows from the first port 12 and the first vertical hole 16 to the first notch 24, and from the first hole 36 ₁ through the first communication port 49' ₁ to the first switching valve 8 ₁ . It flows into the groove 50' ₁ on one side, from the first oil hole 52', through the groove 51' ₂ on the other side, and from the second port 56' ₂ into the pin cylinder 5 ₁ of the first work jig 2 _1. The knock pin 6 is supplied to the reduction chamber _51b and enters the workpiece C. At this time, the extension chamber _51a is connected to the first port _56'1 → the first
Other side groove 51' ₁ → second oil hole 53' → second one side groove 50' ₂ → second communication port 49' ₂ → second hole 36 ₂ → second
It flows out into the tank 62 from the notch 25 → second vertical hole 17 → second port 13.

On the other hand, the pressure oil flowing in from the inlet port 14 is
Vertical hole 18 → third notch 26 → third hole 36 ₃ → third communication port 49' ₃ → third other side groove 51' ₃ → fourth oil hole 5
5'→Fourth one-side concave groove _50'4 →Fourth port _56'4 is supplied to the clamping cylinder ₃₁ reduction chamber _31b , and the clamper 4 clamps the workpiece C. At this time, the extension chamber 3 ₁ a is connected to the third port 56' ₃ → third one side groove 50' ₃ → third oil hole 54' → fourth other side groove 51' ₄
→4th communication port 49' ₄ →4th hole 36 ₄ →4th notch 2
7 → the fourth vertical hole 19 → flows out from the drain port 15 to the tank 62.

Moreover, when the solenoid valve 60 is set to the second position from the above-mentioned state, the pressure oil of the pump 61 flows to the second port 13 and the first port 12 is connected to the tank 62, so that the pressure oil flows in the opposite direction as described above. The cylinder 5 for the dowel pin is extended and the dowel pin 6 is attached to the workpiece C.
Get out more.

Furthermore, when the solenoid valve 60 is in the first position and the handle 42 ₁ is in the second position, the piston 41' of the first switching valve 8 ₁ is rotated 45 degrees to the position shown by the dashed line in FIGS. 6 to 9. As described above, the pressure oil flowing from the first port 12 is supplied to the reduction chamber _51b of the dowel pin cylinder ₅₁ , and the dowel pin 6 enters the workpiece C. On the other hand, the pressure oil flowing in from the inlet port 14 flows through the third vertical hole 18 into the third one-side concave groove 50' ₃
from the third port 56' ₃ to the clamp cylinder 3.
The pressure oil in the contraction chamber _{3 1} b flows directly into the expansion chamber 3 ₁ a of the 4th port 56' ₄ , passes through the 4th concave groove 50' ₄ on the first side, and flows from the fourth vertical hole 19 to the drain port 15. The clamper 4 becomes unclamped.

Furthermore, when the handle 42 ₁ is set to the first position, the piston 41' of the first switching valve 8 ₁ rotates 45 degrees to the position shown by the two-dot chain line in FIGS. 6 to 9, and the pressure flowing from the first port 12 Oil flows from the first vertical hole 16 to the first
The pressure oil in the contraction chamber _51b is directly supplied from the first port 56'1 through the concave groove _50'1 on one side to the extension chamber _51a of the dowel pin cylinder ₅₁ , and the pressure oil in the contraction chamber _51b is supplied to the second port _56'2 , the 2
Since it flows out from the second port 13 through the second vertical hole 17 from the concave groove 50' ₂ on one side, the dowel pin 6 slips out from the workpiece C.

On the other hand, the pressure oil flowing in from the inlet port 14 flows into the extension chamber 3 ₁ a of the clamping cylinder 3 ₁ from the third port 56' ₃ as described above, and the pressure oil in the contraction chamber 3 ₁ b flows as described above. Similarly, it flows from the fourth port _56'4 to the drain port 15 via the fourth vertical hole 19.
Clamper 4 becomes unclamped.

In this way, the clamper 4 and knock pin 6 of the first workpiece jig ₂₁ facing the loading/unloading station A can perform clamping, unclamping, workpiece loading, and workpiece loading by switching the solenoid valve 60 and the first switching valve ₈₁ . I can move out.

Further, the switching valves 8 ₂ , 8 ₃ , 8 ₄ of the workpiece jigs 2 ₂ , 2 ₃ , 2 ₄ facing each processing station B are all the same, and the operation of only the second switching valve 8 ₂ will be explained.

Pressure oil flowing in from the inlet port 14 flows into the third vertical hole 1
8 → Oil passage 30 → Second groove 21 → Second hole 37 ₂ → Second communication port 49″ ₂ → Second first side groove 50″ ₂ → Second oil hole 53″ → First other side groove 51 ″ ₁ → 1st port 56″ ₁
Pressure oil is supplied to the extension chamber 5 ₂ a of the cylinder 5 ₂ for the dowel pin, and the pressure oil in the contraction chamber 5 ₂ b is supplied to the second port 56″ ₂
→ Second other side groove 51″ ₂ → First oil hole 52″ → First first side groove 50″ ₁ → First communication port 49″ ₁ → First hole 37 ₁
→The first groove 20→The oil passage 33→The fourth vertical hole 19 flows out to the drain port 15, so the knock pin 6
escapes from work C.

On the other hand, the pressure oil flowing in from the inlet port 14 is
Vertical hole 18 → oil hole 32 → fourth groove 23 → fourth hole 37
₄ → 4th communication port 49″ ₄ → 4th other side groove 51″ ₄ → 3rd vertical hole 54″ → 3rd first side groove 50″ ₁ → 3rd port 56″ Extension of clamp cylinder 3 ₂ from ₃ The pressure oil flows into the chamber 3 ₂ a, and the pressure oil in the reduction chamber 3 ₂ b flows into the fourth port 56″ ₄
→Fourth first side groove 50″ ₄ →Fourth vertical hole 55″→Third other side groove 51″ ₃ →Third communication port 49″ ₃ →Third hole 37 ₃
→The third groove 22→the oil hole 34→the fourth vertical hole 19 and flows out to the drain port 15, so the clamper 4 becomes unclamped.

When the handle 42'' is moved to the second position from the above state, the piston 41'' rotates 45 degrees to the position shown in dashed lines shown in FIGS. Pressurized oil flows into the extension chamber _52a of the cylinder ₅₂ for the dowel pin from the port _{56''1, and the pressure oil in the contraction chamber 52b flows} out from the second port _56''2 to the drain port 15, and moves the dowel pin 6 to the workpiece C. Extract more.

On the other hand, the pressure oil flowing in from the inlet port 14 is
The pressure oil in the extension chamber 32a flows from the concave groove 50" ₄ on one side through the fourth port 56" ₄ into the contraction chamber _32b of the clamping cylinder ₃₂ , and the pressure oil in the extension chamber _32a flows from the third port 56" ₃ to the fourth port 56"4. The clamper 4 clamps the work C because it flows out to the drain port 15 through the concave groove _50''3 on one side.

Furthermore, when the handle 42'' is placed in the first position, the piston 41'' rotates 45 degrees to the position shown by the two-dot chain line in FIGS. Groove 50″ ₂ from 2nd port 5
Reduction chamber 5 ₂ b for cylinder 5 ₂ for dowel pin from 6″ ₂
The pressure oil in the extension chamber _52a flows into the first port _56''1
Drain port 1 via the first groove 50″ ₁
5, the knock pin 6 enters the workpiece C.

On the other hand, the pressure oil flowing from the inlet port 14 flows into the reduction chamber 3 ₂ b of the clamping cylinder 3 ₂ as described above.
The pressure oil in the extension chamber _32a flows out to the drain port 15, so the clamper 4 clamps the workpiece C.

In this manner, by switching the second switching valve ₈₁ , the clamper 4 and the knock pin 6 of the workpiece jig ₂₂ facing the first processing station _B1 can be operated to clamp, unclamp, insert a workpiece, and take out a workpiece.

Note that the second and third processing stations B 2 and B ₂ can also be switched by switching the third and fourth switching valves 8 ₃ and 8 ₄ .
Clamp, unclamp, and clamp the clampers 4 and knock pins 6 of the workpiece jigs 2 ₃ and 2 ₄ facing B ₃ .
Workpiece entry and workpiece output operations are possible.

Also, the index table 1 is rotated 90 degrees so that the fourth workpiece jig 2 ₄ faces the loading/unloading station A, and the third, second, and first workpiece jigs 2 ₃ , 2
₂ , 2 ₁ to the first, second and third processing stations B ₁ ,
By facing B ₂ and B ₃ , the fourth work jig 2 ₄ can operate in the same manner as the first work jig 2 ₁ described above, and the third, second, and first work jig 2 _3,2
2 and 2 ₁ can be operated in the same manner as the second workpiece jig 2 ₂ described above.

In other words, the workpiece jig 2 facing the loading/unloading station A can be operated by the switching valve 8 and the solenoid valve 60.
A workpiece jig 2 facing the processing station B can be operated by a switching valve 8.

The present invention is as described above, and by switching the switching valve 8, the clamping cylinder 3 and the knock pin cylinder 5 of the workpiece jig 2 can be expanded and contracted, and the workpiece jig 2 facing any station A or B can be operated.
The clamper 4 and knock pin 6 can be clamped, unclamped, and loaded into and taken out of the workpiece.

Therefore, it is possible to remove workpieces that have been processed incorrectly or have been incorrectly assembled.

[Brief explanation of drawings]

The drawings show embodiments of the present invention.
The figure is an overall plan view, Figure 2 is a vertical sectional view, Figure 3 is a front view, Figure 4 is a plan view of the rotary valve, Figure 5 is a vertical sectional view, Figures 6, 7, and 8. , Figure 9 shows the - line, - line, - line, - of figure 5.
FIG. 1 is an index table, 2 is a work jig, 3 is a clamp cylinder, 4 is a clamper,
5 is a cylinder for the dowel pin, 6 is the dowel pin, and 7 is the dowel pin cylinder.
is a rotary valve, and 8 is a switching valve.

Claims (1)

[Claims] 1 A loading/unloading station A and a plurality of processing stations B are arranged at equal intervals around an index table 1, and a plurality of workpiece jigs 2 facing each of the stations A and B are arranged on the index table 1. At the same time, the workpiece jig 2 has a structure including a clamper 4 which is clamped and unclamped by a clamping cylinder 3, and a knock pin 6 which operates to insert and extract a workpiece by a cylinder 5 for dowel pins, and each of the cylinders 3, 5 The structure is such that pressure oil is supplied to the rotary valve 7 through a rotary valve 7 provided at the rotation center of the index table 1, and the cylinder 3 of each work jig 2 of the rotary valve 7,
A switching valve 8 is provided in each port connected to the extension chambers 3a, 5a and contraction chambers 3b, 5b of No. 5, respectively, and the switching valve 8 is used to reverse the flow of pressure oil.
A workpiece conveyance device characterized by being switchable between two positions.