JP2572167B2 - Work transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work transfer apparatus for transferring a work, for example, a rocker arm to each station in order to perform a predetermined processing operation.

[0002]

2. Description of the Related Art For example, it is desired that rocker arms for operating valves of an automobile engine be efficiently mass-produced. A transfer device in which machines are arranged in a line is used.

Incidentally, the rocker arm is provided with a slipper surface which is in contact with a cam portion provided on the camshaft, and this slipper surface is manufactured with high precision in order to achieve a high surface pressure and a high sliding speed. There is a need. For this reason, in a conventional transfer apparatus, a configuration is adopted in which a work mounting jig is provided on a transfer conveyor as a work transfer apparatus, and the rocker arm is positioned and fixed to the work mounting jig by a clamp means.

[0004]

However, in the configuration in which the rocker arm is fixed to the work mounting jig by the clamp means as described above, it takes a considerable amount of time to attach / detach the rocker arm. It has been pointed out that a transfer apparatus having a station for use cannot achieve efficient transfer processing. Moreover, when processing various different rocker arms, the entire work mounting jig must be replaced in correspondence with each rocker arm, which is disadvantageous in that it is inferior in versatility. There is a problem that the work of attaching and detaching to and from the transfer conveyor becomes complicated, and the structure of the entire work transfer device becomes complicated.

The present invention solves this kind of problem and provides a work transfer device capable of easily and efficiently transferring various kinds of works and simplifying the structure. The purpose is to:

[0006]

In order to achieve the above object, the present invention provides an endless chain member which moves horizontally through an actuator, and an endless chain member on a workpiece transfer side.
The chain member is formed below the step side chain member.
The length of the chain member to support the rollers
A jig plate integrally provided at predetermined intervals on a guide rail disposed in a direction to the link member and a link member constituting the chain member;
It is arranged on both sides in the longitudinal direction, and the jig
A side plate having a guide groove for guiding the rate, low
At least one side has a V-groove extending horizontally.
And a notch groove on the other side crossing the side
Is formed and is detachably held by the jig plate.
And over click holding pallet, the provided on at least one side of the jig plate, it engages the V groove of the pallet and out collision <br/> toward the direction in and through the elastic body By
Positioning the pallet in the longitudinal direction of the chain member
For holding plunger and work station
Placed on the pallet via an actuator
The pallet is engaged with the notch groove, and the pallet is
Pressed against the side plate crossing the hand direction and having the guide groove
Positioning with positioning members
And a mechanism .

[0007]

With the above-described work transfer device according to the present invention, when the type of work is different, the pallet fixed to the jig plate by the plunger is removed from the jig plate and then corresponds to the desired work. Pallet
It is held on the jig plate under the pressing action of the plunger. Therefore, it is possible to easily and quickly respond to various different works only by changing the pallet, thereby obtaining an advantage of excellent versatility. Moreover, the jig plate itself forms a part of the chain member, and the structure of the entire chain member is simplified.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the work transfer device according to the present invention will be described in relation to a transfer device incorporating the work transfer device.
This will be described below with reference to the accompanying drawings.

In FIG. 2, reference numeral 10 denotes a transfer device. The transfer device 10 includes a work transfer device 12 according to the present embodiment and a work transfer device 12 holding a rocker arm (work) 14. Pallet 16 which is conveyed in the direction of arrow A through this, and other rocker arms which are detached from the pallet 16 and which are held by the work mounting jigs 18a to 18c of the first to third stations S1 to S3. 14 are provided.

The work transfer device 12 includes a rotary drive source 2
Endless chain member 2 that moves horizontally through
8, a jig plate 32 integrally provided at predetermined intervals on a link plate (link member) 30 constituting the chain member 28, and a conveying direction of the jig plate 32 (arrow A direction). Provided at both ends 34a, 34b,
A plunger P projecting inward via a coil spring (elastic body) C, and a work holding pallet 16 which is pressed and held by the jig plate 32 by the plunger P and is detachable from the jig plate 32. (See FIGS. 1 to 3).

A first sprocket 35 is connected to the rotary drive source 26, and a chain member 28 is engaged with the first sprocket 35 and the second sprocket 36. The chain member 28 includes a link plate 30 and a jig plate 32.
And a roller 38 for connecting them.

As shown in FIG. 4, on both sides in the longitudinal direction of the chain member 28, side plates 42a, 42 having guide grooves 40a, 40b for guiding the jig plate 32 at the upper end.
b, and a guide rail 44 for holding each roller 38 is provided below the chain member 28.
Is provided. Each station S is provided on the side plate 42a.
1, a positioning mechanism 46 is mounted at a position corresponding to S2. The positioning mechanism 46 includes a cylinder 48, and a positioning member 52 having a protruding tip is fixed to a rod 50 extending from the cylinder 48.

As shown in FIG. 5, a reference point F is provided on the end side of the pallet 16, and a predetermined distance L from the reference point F corresponding to the shape (curvature or the like) of the slipper surface M of the rocker arm 14. A positioning pin 54 is provided at a distance from the positioning pin 54, and a slotted positioning pin 56 is further provided at a predetermined distance from the positioning pin 54. Positioning pin 5
Reference numerals 4 and 56 are inserted into the holes H1 and H2 of the rocker arm 14, and the positioning pins 54 are provided with holes H1 through a plunger P that engages with a coil spring C.
A stopper means 58 for pressing the inner wall surface of the rocker arm 14 to fix the rocker arm 14 is provided. This pallet 1
6 is formed with a V-shaped notch groove 60 in which a positioning member 52 constituting the positioning mechanism 46 is freely engageable, and a plunger P of the jig plate 32 is provided on both end surfaces intersecting the end surface. A V-groove 61 for engagement is formed.

The turning loader 20 disposed at the first station S1 has a turntable 64 connected to a rotary drive source 62. On both sides of the turntable 64, the inner wall surface of the hole H2 of the rocker arm 14 is provided. An opening / closing chuck 66 that can be pressed and held is mounted. In the first station S1, a grinding machine 68 for grinding the slipper surface M of the rocker arm 14 is provided. This grinding machine 68
Is provided with a grinding unit 72 which is movable in the direction of arrow A and in the direction of arrow B intersecting the same via actuators 70a and 70b.
A grinding wheel 76 connected to 4 is rotatably mounted.

The turning loader 22 disposed in the second station S2 has the same configuration as the turning loader 20 described above, and a detailed description thereof will be omitted. In the second station S2, an inspection machine 80 for inspecting the grinding state of the rocker arm 14 is arranged.
Is a dial gauge (shown in the drawing) for engaging with the slipper surface M of the rocker arm 14 and measuring the distance between the slipper surface M and the center of the hole H2 to inspect the grinding state of the slipper surface M. ).

At the third station S3, there is arranged a posture changing unit 82 for separating the pallet 16 on the chain member 28 from the jig plate 32 and changing the pallet 16 from a horizontal posture to a vertical posture. This posture conversion unit 82
Is a movable table 84 which can move back and forth in the direction of arrow A and can move up and down.
And a pair of open / close claws 86 that can be freely opened and closed on the movable base 84.
a and 86b are provided swingably. The reversing loader 24 arranged in the third station S3 is configured by turning the above-mentioned revolving loader 20 into a horizontal type, and includes a main body 90 that can move forward and backward in the arrow A direction. A turntable 94 connected to a rotary drive source 92 is mounted on the main body 90, and open / close chuck sections 96 are mounted on both sides of the turntable 94, respectively.

The work mounting jig 18c to which the opening / closing chuck section 96 faces includes a clamp member 98 capable of fixing the rocker arm 14 in an upright state.
The rocker arm 14 is held so as to be swingable in the vertical direction through the arm. The drive mechanism 100 includes a rotary drive source 102
The swing arm 104 is connected to a rotating shaft (not shown) of the first embodiment, and an end of the swing arm 104 is engaged with the work mounting jig 18c.

At the third station S3, a horizontal oscillating grinder 106 for superfinishing the slipper surface M of the rocker arm 14 held by the work mounting jig 18c.
Is arranged. The horizontal swing grinding machine 106 includes a swing unit 108 that can swing horizontally, and a relatively soft grindstone 110 is mounted on the swing unit 108 (see FIG. 2).

Next, the operation of the work transfer device 12 configured as described above will be described in relation to the transfer device 10.

First, a desired pallet 16 is prepared corresponding to the type of the rocker arm 14, and this pallet 16 is
Each jig plate 32 is fixed via a coil spring C and a plunger P. Then, the rocker arm 1 is placed on the pallet 16 on the upstream side in the transport direction (the direction of arrow A).
4 is retained. Here, the hole H of the rocker arm 14
1, H2, the positioning pins 54, 56 of the pallet 16 are inserted, and the rocker arm 14 is inserted through stopper means 58 provided on the positioning pins 54.
Is positioned and fixed on the pallet 16.

The first and second sprockets 35, 3 are operated under the action of a rotary drive source 26 constituting the work transfer device 12.
6, the chain member 28 is driven, and the pallet 1 mounted on each jig plate 32 of the chain member 28
6 starts moving in the direction of arrow A. When the pallet 16 reaches the first station S1, the rotary drive source 26 is deenergized, and the cylinders 48 constituting the positioning mechanism 46 arranged corresponding to the first station S1.
Is driven. For this reason, the rod 50 protrudes toward the pallet 16, and the positioning member 52 provided on the rod 50 engages with the notch groove 60 of the pallet 16, and the rocker arm 14 held by the pallet 16 is in the first position. It will be located at station S1.

Next, the turntable 64 is rotated under the driving action of the rotary drive source 62 constituting the swing loader 20, and one of the opening / closing chuck portions 66 is disposed above the rocker arm 14 on the pallet 16. The opening / closing chuck 66 is lowered and inserted into the hole H2 of the rocker arm 14. And the opening / closing chuck part 66 is provided with the positioning pin 5.
6, the inner wall surface of the hole H2 of the rocker arm 14 is pressed and held. In this state, the opening / closing chuck 66 is moved up integrally with the rocker arm 14,
The rocker arm 14 is taken out of the pallet 16. Further, the turntable 64 is turned through the rotary drive source 62, and the rocker arm 1 held on the pallet 16 is rotated.
4 is carried into the work mounting jig 18a. on the other hand,
The rocker arm 14, which has been held by the work mounting jig 18 a and has been ground by the grinding machine 68, is conveyed onto the pallet 16 while being simultaneously held by the other opening / closing chuck 66.

After the rocker arm 14 is mounted on the work mounting jig 18a, the grinding unit 72 constituting the grinding machine 68 is driven to rotate while moving in the directions of arrows A and B via the actuators 70a and 70b. Under the action of the source 74, the grinding wheel 76 is rotated. For this reason,
Grinding is performed on the slipper surface M of the rocker arm 14 held in the work mounting jig 18a and swinging in the direction of the arrow.

The rocker arm 14, which has been subjected to the predetermined grinding at the first station S 1,
After being held on the pallet 16 via the pallet 16, when another rocker arm 14 is being ground at the first station S1, it is transported integrally with the pallet 16 in the direction of arrow A and It is carried into the station S2. In the second station S2, similarly, the positioning mechanism 46
The rocker arm 14 positioned via the rotary loader 22 is conveyed to the work mounting jig 18b while being held by the turning loader 22, while the other rocker arm 14 held by the work mounting jig 18b is 22
Are simultaneously moved to the pallet 16 side.

In the second station S2, a dial gauge (not shown) constituting the inspection machine 80 is mounted on the rocker arm 14 held by the work mounting jig 18b.
Is engaged with the slipper surface M and the hole H2.
Measure the distance from the center. As a result, if the distance is within the allowable range, it is determined that the grinding of the rocker arm 14 is good, and the next step, that is, the third station S3
Head for.

In the third station S3, the open / close claws 86a and 86b constituting the posture changing unit 82 are on standby on the chain member 28 in an open state. When the pallet 16 is carried into the third station S3, the opening / closing claw 8
6a and 86b are displaced close to each other, and the pallet 16 is positioned and held. Next, after the movable base 84 has risen to a predetermined height position, the opening / closing claws 86a and 86b rotate 90 ° integrally with the pallet 16, and the pallet 16 and the rocker arm 14 are held in a vertical posture.

When the movable table 84 moves toward the reversing loader 24 and is stopped, the main body 90 constituting the reversing loader 24 moves in the direction of arrow A, and is provided on the main body 90. Of the rocker arm 14 held by the pallet 16 in the vertical position.
2 to support the inner wall surface. This opening / closing chuck portion 96
After moving in a direction away from the pallet 16 integrally with the main body 90, it is turned 180 ° together with the turntable 94 via the rotary drive source 92 and arranged on the work mounting jig 18 c. At this time, the other rocker arm 1 which is held by the work mounting jig 18c and has been subjected to the super-finishing is completed.
4 is held by another opening / closing chuck portion 96 provided on the turntable 94 and is conveyed to the pallet 16 arranged above the chain member 28 in a standing posture.

After the rocker arm 14 is fixed to the work attaching jig 18c via the clamp member 98, the swing arm 104 swings under the action of the rotary drive source 102 constituting the drive mechanism 100, and the swing arm 104 swings. The work mounting jig 18c that engages with the moving arm 104 swings up and down. In synchronization with this, the swing unit 108 constituting the horizontal swing grinding machine 106 is displaced in the horizontal direction integrally with the grindstone 110. As a result, the slipper surface M of the rocker arm 14 is super-finished through the relatively soft grindstone 110.

The rocker arm 14, which has been subjected to the superfinishing at the third station S3, is conveyed to the standing pallet 16 via the reversing loader 24, and the pallet 1
6 is held. Next, after the movable base 84 constituting the posture conversion unit 82 moves in the direction of arrow A, the open / close claw 86
a and 86b are arranged in a horizontal posture. In addition, movable table 8
4 descends, the rocker arm 14 held by the open / close claws 86a, 86b is disposed on the jig plate 32 on the chain member 28, and the open / close claws 86a, 86b are displaced away from each other. The pallet 16 is held on the jig plate 32.

The jig plate 32 includes the rocker arm 14.
Is moved in the direction of the arrow A under the driving action of the chain member 28, and the rocker arm 14 is transported to the next work station or the like.

In this case, in this embodiment, the pallet 16 for positioning and holding the rocker arm 14 has V-grooves 61 formed on both end surfaces thereof and both end portions 34 of the jig plate 32.
a, 34b, and is detachably attached to the jig plate 32 via a plunger P projecting toward the V groove 61 via a coil spring C. Therefore, when the type of the rocker arm 14 is different, the pallet 16 corresponding to the shape of the rocker arm 14 is
Only by replacing the pallet 16 arranged on the jig plate 32, it is possible to easily cope with the problem. In particular, the work of attaching and detaching the pallet 16 is quickly performed,
6 can be efficiently performed at once.

In addition, since the jig plate 32 holding the pallet 16 and the link plate 30 and the roller 38 integrally form the chain member 28, the chain member 2
8 can be simplified. Further, only the pallet 16 needs to be exchanged for various different rocker arms 14, and the chain member 28 provided with the same jig plate 32 can be effectively used, and there is an effect that the versatility is excellent.

Further, the jig plate 32 is guided along guide grooves 40a and 40b formed in side plates 42a and 42b arranged on both sides of the chain member 28, and each roller constituting the chain member 28 is guided. 38 is held on a guide rail 44. Therefore, the chain member 28 is not loosened, and the pallet 16 can be transported accurately. Further, under the driving action of the positioning mechanism 46 disposed corresponding to the first and second stations S1 and S2, the positioning member 52 is engaged with the notch groove 60 of the pallet 16 in the direction of the arrow A of the pallet 16. Is determined. At this time, the pallet 16 is pressed by the side plate 42b and the positioning in the direction of the arrow B is performed at the same time, whereby the rocker arm 14 has an advantage that it is accurately positioned and arranged with respect to the first and second stations S1, S2. is there.

[0034]

According to the work transfer device of the present invention,
The following effects can be obtained.

When the type of work is different, the pallet fixed to the jig plate by the plunger and the pallet corresponding to the desired work can be easily and promptly dealt with simply by replacing the pallet. The advantage of using the jig plate is excellent in versatility. Moreover, the jig plate itself forms a part of the chain member, and the structure of the entire chain member is simplified.

[Brief description of the drawings]

FIG. 1 is an enlarged explanatory view of a main part of a work transfer device according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a transfer device incorporating the work transfer device.

FIG. 3 is a partial side view of the work transfer device.

FIG. 4 is a partial cross-sectional front view of the work transfer device.

FIG. 5 is a plan view of a pallet and a rocker arm.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Transfer device 12 ... Work transfer device 14 ... Rocker arm 16 ... Pallet 18a-18c ... Work mounting jig 20,22 ... Swivel loader 24 ... Reversing loader 26 ... Rotation drive source 28 ... Chain member 30 ... Link plate 32 ... Healing Ingredient plate 38 Roller 40a, 40b Guide groove 42a, 42b Side plate 44 Guide rail 46 Positioning mechanism 61 V groove 68 Grinding machine 80 Inspection machine 82 Attitude conversion unit 106 Horizontal swing grinding machine C Coil spring P… Plunger

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-229242 (JP, A) JP-A-60-71408 (JP, A) Real opening Sho-64-53115 (JP, U)

Claims (1)

(57) [Claims] An endless chain member that moves horizontally via an actuator and an upper chain member that is a workpiece transfer side are provided below a front chain member.
To support the rollers constituting the chain member.
Guide rails arranged in the longitudinal direction of the chain member
And Lumpur, the link member constituting the chain member, and the jig plate provided integrally spaced by a predetermined distance, when placed on both sides in the longitudinal direction of the chain member Tomo
A guide groove for guiding the jig plate to the upper end
And a V-groove extending horizontally in at least one side.
And a notch groove on the other side intersecting the said side
Part is formed and is detachably held by the jig plate.
A work holding pallet , provided on at least one side of the jig plate,
Before the pallet protruding toward the direction in and through the elastic body
By engaging the V-groove, the pallet is
A plunger for positioning and holding the longitudinal direction of the over down members are arranged corresponding to the working station, actuator
Through the notch groove of the pallet through the
Let cross the length of the chain member and
Positioning in the direction to press against the side plate with guide groove
A work transfer device comprising: a positioning mechanism having a positioning member .