JPH074106Y2 - Work centering device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a centering device for positioning a work on a pallet so that the center of the work coincides with the center of a work mounting portion.

(Prior Art) As a work centering device, a pair of claw members that bring the work toward the center of the work placing portion are provided on both sides of the work placing portion of the pallet, and the work is placed on the work placing portion. It is generally known that the work is centered by operating both the pawl members at the same time.

As a means for actuating the two claw members, a pair of rods are arranged in series so as to be movable in directions away from each other, and the pair of claw members are actuated by the movement of both rods. There is a cylinder device in which a wedge-shaped actuating body is inserted between the opposite ends of the rods to move in the separating direction.

(Problems to be solved by the invention) However, in the case of the centering means, in order to make both of the pawl members act on the work on a line passing near the center of gravity of the work, the rod for activating the pawl members is provided at the center of gravity of the work. It must be placed underneath, which makes placement of the work support member difficult. Further, when a through hole is formed in the pallet and the work is punched from below the pallet through the through hole, the tool of the processing machine easily interferes with the rod.

Further, in order to perform centering of the work, it is necessary to apply a relatively large force to the work. Therefore, it is necessary to use a large cylinder device for moving the rod. There is a problem in that it causes an increase in size.

An object of the present invention is to rotate a pair of pulling arms respectively supported on a support shaft to center a work, and to use the actuating body and a pair of rods to turn the pulling arms, It is possible to dispose the rod at a position away from the bottom of the work and to perform centering of the work with a relatively small driving force.

(Means for Solving the Problem) In order to solve such a problem, the present invention provides a rotating shaft parallel to a supporting shaft of the moving arm instead of directly connecting the rod to the moving arm. By rotating the moving shaft with a rod and transmitting the driving force to the arm via the rotating shaft,
By providing the rotating shaft, the rod can be arranged at a position distant from the moving arm in the axial direction thereof, and it is not necessary to dispose the rod under the work, while the rotating shaft can be moved by the rod. When rotating, an arm part is provided on the rotating shaft and a rod is applied to the tip of this arm part to double the driving force from the rod to the rotating shaft and transmit it, and centering of the work with a relatively small driving force. It enables you to do.

That is, the means is a centering device for positioning the work so as to match the work placement part of a preset pallet, and a pair of parallelly arranged at predetermined intervals on the pallet. A pair of pivot arms that are rotatably supported by the support shafts and that abut the work from both sides so that the work comes to the set position of the work placement part, and the both support shafts on the pallet. The first and second arms are provided in parallel and rotatably, one end of which is connected to the moving arms via a link member, and the other end of which is provided with a second arm. Between the pair of rotary shafts that are moved to the side, and the second arm portions of the rotary shafts, one end is brought into contact with each second arm portion in a direction orthogonal to the rotary shaft, and the other ends are opposed to each other. A pair of rods movably in the direction to be separated from each other and urged in directions opposite to each other, and to push the second arm portion by the movement in the directions to separate from each other to rotate the rotating shaft; An operating body which is provided between the opposite ends of the two rods so as to be able to advance and retreat in a direction orthogonal to the rod, and which moves the rods in a direction away from each other by an advancing movement. It is a thing.

(Operation) In the centering device, when the actuating body is moved forward by the driving means, the pair of rods simultaneously move in the directions in which they are separated from each other, and the respective rotary shafts receive the force of the respective rods by the second arm portion. Rotate. As a result, the first of both rotary shafts
The arm part rotates, and the pair of pulling arms receives the turning force of the first arm part via the link part, and simultaneously rotates from both outer sides of the work to center the work.

Then, each of the rods can be applied to the second arm portion at the end of the rotating shaft at a position apart from the position of the pulling arm in the axial direction thereof. The position of the rod can be shifted from below the work. Further, since the rod causes the rotation shaft to rotate via the second arm portion, the driving force is doubled and transmitted from the rod to the rotation shaft by the second arm portion.

(Effect of the invention) Therefore, according to the present invention, a rotary shaft parallel to the support shaft of the approaching arm is provided, and the rotary shaft is rotated by the rod through the arm portion. Since the approach arm can be rotated, it is not necessary to dispose the rod under the work, and the work supporting member can be easily arranged.
Even when machining the lower surface of the workpiece, the tool does not interfere with the rod, which facilitates machining.
Since the work can be centered with a relatively small driving force, it is possible to prevent the centering device or the pallet from increasing in size.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a pallet 1 used in a production line for processing and assembling parts on a work (engine intake manifold) W shown in FIG. In the case of this embodiment,
In the production line, milling of the mounting surface (front surface) 2 of the work W to the cylinder head, bolt hole processing of the mounting surface 2, processing of screw holes 3 on the upper surface, upper and side pipes 4
Holes for press-fitting, press-fitting of pipes into the holes, screw holes on the rear surface and the lower surface, and the like are performed.

That is, the pallet 1 has positioning reference holes 10 at four corners into which reference pins of the conveyor, the processing section or the assembly section are fitted,
Three receiving members 11, 12, 12 for receiving the work W from below,
The center of the work W is made to coincide with the center of the worm mounting portion of the pallet 1, that is, the centering means 13 for positioning the work W left and right, and the front-back positioning means 23 for positioning the work W forward and backward. , 3 means for holding the work W on the receiving members 11, 12, 12 from above
It has 24,25,25.

One receiving member 11 is composed of a head portion of a bolt screwed to a bracket in the substantially central portion of the pallet 1. The other two receiving members 12, 12 are arranged on both sides of the pallet 1 at intervals. The both receiving members 12 have a receiving surface 12a for supporting the work W from below as shown in FIGS.
Rising surface 1 from the rear end (upper side in FIG. 1) of this receiving surface 12a
With 2b.

The centering means 13 is arranged in the vicinity of the receiving members 12, 12 and moves the work W to the center of the pallet 1 so that the center of the work W comes to the center of the work placing portion.
And a pair of parallel support shafts 1 that support the moving arms 14, 14.
5,15, a pair of rotating shafts 16,16 for rotating the moving arms 14,14, a pair of rods 17,17 for rotating the rotating shafts 16,16, and both rods 17,17. And the cylinder device 19 for moving the actuator 18 forward and backward.
It has and.

That is, the both support shafts 15 and 15 are arranged in the front-rear direction below the receiving members 12 and 12, and the pushing portion 14a at the upper end of the intermediate portion of the moving arms 14 and 14 in the vertical direction is received by the receiving surface 12a. , 12a are supported so as to rotate inward from both outer sides. Also,
A connecting portion in which the lower ends of the pulling arms 14 and 14 projecting downward from the support shafts 15 and 15 are connected to a link member 20 described later.
It is 14b. On the other hand, the rotary shafts 16 and 16 are provided on the pallet 1 so as to be rotatable in parallel with the both support shafts 15 and 15 and about the axis, and the front end thereof has a connecting portion of the shifting arm 14.
A first arm portion 21 connected to 14b via a link member 20 is provided, and a second arm portion 22 is provided at the rear end.

The two rods 17, 17 are arranged between the second arms 22, 22 of the rotary shafts 16, 16 and have their outer ends respectively arranged in a direction perpendicular to the rotary shafts 16, 16. 2nd arm part 22,22
Are urged in a direction in which the inner ends are opposed to each other so as to be movable in the direction in which they are separated from each other, and are biased by springs 38, 38 in the direction in which they are opposed to each other. 2 Rotating axis by pushing the arm part 22,322
It is designed to rotate 16,16. The opposite inner ends are formed with inclined surfaces that are diagonally forward and opposite to each other.

The actuating body 18 is provided between the inner ends of the rods 17 and 17 so as to be movable back and forth in a direction orthogonal to the rods 17 and 17, and is inclined in mutually opposite directions at the front end portion in contact with the inner ends. Is provided with a pair of inclined surfaces 18a, 18a, the rear end of which is the cylinder device 1
It is connected to the piston rod 9 and is adapted to move the rods 17, 17 in a direction away from each other through the pair of inclined surfaces 18a, 18a by the advancing movement.

The front-rear positioning means 23 is a bracket fixed to the pallet 1.
A pad member 27 pivotally supported on 26 and a cylinder device 28 (see FIG. 5) for rotating the pad member 27 back and forth,
The abutting member is brought into contact with a part of the work W from the front to push the work W rearward, and the rising surface 12 of the receiving member 12, 12 is pushed.
By bringing them into contact with b and 12b, the front and rear positioning of the work W on the work mounting portion is performed.

Further, one clamp means 24 is arranged near the center of the pallet 1, and the clamp arm 29 is connected to the cylinder device.
It is adapted to be rotated up and down by 30 to hold the rear part of the work W from above. Further, the other two clamp means 25, 25 are arranged on both outer sides of the above-mentioned moving arms 14, 14, and as shown in FIG. 3, the clamp arm 32 pivotally supported on the bracket 31 is attached to the cylinder device 33. The work W is moved up and down to press both sides of the work W from above.

Further, in FIG. 1, reference numeral 34 is a conversion device with a check valve for converting air pressure into hydraulic pressure to act on each of the cylinder devices, including a joint 35 of the air supply pipe, an air pressure release lever 36, and Is equipped with. In this case, when the air pressure is released, the movable member of each cylinder device is returned to its original position by the return spring. Further, in FIGS. 1 and 5, 37 is a through hole formed in the pallet 1 for processing the lower surface of the work.

FIG. 6 shows the overall structure of the production line.

That is, this line is clockwise on the drawing,
A first transfer line 41 having a loading / unloading section 40 for the work W, and a second transfer line connected at a right angle to the first transfer line 41.
42, a third transfer line 43 connected at a right angle to the second transfer line 42, and a fourth transfer line 44 connected at a right angle to the third transfer line 43 to form a rectangular closed loop. . Further, the work W of this example is an intake manifold of the engine, and is positioned and fixed to the pallet 1 and can be transferred only in the transfer direction at each connection portion of the transfer lines 41 to 44 without changing the attitude and direction at the time of transfer. The pallet 1 is changed to be carried around the production line once.

In the first transfer line 41, following the loading / unloading section 40, a first front surface processing section 52 for milling the front surface of the work W with a milling machine 51, and a second boring machine for drilling the front surface with a drilling machine 53 The front surface processing unit 54, the first upper surface processing unit 56 for performing the upper surface milling of the work W by the milling machine 55, and the second and third upper surfaces for performing the turret cutting on the upper surface by the vertical turning type turret type machine tools 57, 58, respectively. The machining parts 59, 60, the fourth upper surface machining part 62 for drilling the work W from the obliquely upper side by the drilling machine 61, and the first lower surface machining part 64 for drilling the lower surface of the work W by the drill device 63 are arranged. It is set up. An idle section 65 is provided at the corner between the first transfer line 41 and the second transfer line 42.

In the second transport line 42, following the idle section 65, second and third lower surface processing sections 68, 69 for making holes in the lower surface of the work W by the drilling devices 66, 67, respectively, are horizontally swiveled. Type turret type machine tools 70, 71 for turreting the left side of the work W, first and second side surface machining parts 72, 73, and a drill device 74 for drilling the bottom surface of the work W for the fourth bottom surface A processing part 75 is provided. An idle section 76 is provided at the corner between the second transfer line 42 and the third transfer line 43.

In the transfer line 43 shown in FIG. 3, following the idle part 76, the first rear surface processing part 78 for milling the rear surface of the work W with the milling machine 77, and the rear surface of the horizontal turning turret type machine tools 79 to 81, respectively. Second to fourth rear surface processing parts 82 to 84 for performing turret shaving, a deburring part 86 including a deburring device 85, a cleaning part 88 including a cleaning water circulator 87, and a drying part including a hot air generator 89. 90, and the unprocessed detector 91 are provided. An idle section 92 is provided at the corner between the third transfer line 43 and the fourth transfer line 44.

In the fourth transfer line 44, the component press-fitting machines 93-
First with 96 and backup means 97-100 for press-fitting
〜Fourth component assembly parts 101-104 and idle part 105 are provided, and the first to fourth component assembly parts 10 are provided.
Parts Stocker 106 for 1 ~ 104, Parts Feeder 10
7, material handling 108-110 is provided. A leak detecting unit 111 is installed at a corner between the fourth transport line 44 and the first transport line 41, and the leak detecting unit 111 and the loading / unloading unit 40 are not provided on the first transport line 41. Assembly detector 11
2, a cleaning unit 113 is provided.

Then, in the first transfer line 41, the respective processing machines are arranged inside the closed loop, and in the second transfer line 42, the machine tools 70, 71 of the side surface processing parts 72, 73 are arranged outside the closed loop. ,
In the third transfer line 43, the processing machine and the like are arranged inside the closed loop. In the fourth transport line 44, the component press-fitting machine 93 is arranged outside the closed loop in the first component assembly part 101, and the second lower surface processing part 68 of the second transport line 42 is provided.
Parts are press-fitted into the holes formed in. Further, in the second component assembling section 102, the component press-fitting machine 94 is arranged inside the closed loop so that the components are press-fitted into the holes formed by the side surface processing portions 72, 73 of the second transport line 42. It has become. Further, component press-fitting machines 95 and 96 are arranged outside the closed loop in the third component assembling section 103 and inside the closed loop in the fourth component assembling section 104, respectively, so that the components can be press-fitted into the machined holes. It has become.

Further, for the transfer of the work W, a shuttle type transfer claw that feeds a pitch is applied to the free flow conveyor between the loading / unloading section 40 and the deburring section 86.
Transfer from 86 to cleaning section 88, drying section 90 to raw detection section 91
A pusher is applied to each of the conveyance to the cleaning unit 113 and the conveyance to and from the loading / unloading unit 40.
A ceiling-suspended transfer robot is applied between 91 and the fourth transfer line 44 to the cleaning unit 113.

Therefore, when processing the work W and assembling the parts,
First, the work W is placed on the receiving members 12, 12 of the pallet 1,
An air supply pipe is connected to the joint 35 of the conversion device 34 to supply air pressure. As a result, hydraulic pressure is supplied to the cylinder device 19 of the centering means 13, the actuating body 18 moves forward, and the inclined surfaces 18a, 18a at the tip of the actuating body 18 move the pair of rods 17, 17 in directions away from each other (left and right). As a result of this movement, the rotary shafts 16, 16 are attached to the second arms 22, 22 by the rods 17, 17.
The first arm portions 21 and 21 rotate the coupling arms 14 and 14 via the link members 20 and 20 by receiving the moving force from the first arm portions 21 and 21. That is, the pushing arms 14 and 14 push the work W toward the center of the pallet 1 by the pushing portions 14a and 14a at the upper ends thereof to perform centering.

Further, the front-rear positioning means 23 receives hydraulic pressure in its cylinder device 28 to move its piston rod upward,
By rotating 27 backward, the work W is pressed against the rising surface 12b of the receiving members 12, 12 and the front and rear of the work W is positioned. On the other hand, the clamp means 24 receives hydraulic pressure in its cylinder device 30 to move the piston rod upward, thereby rotating the clamp arm 29 to press the vicinity of the rear part of the work W from above, and the clamp means 25, 25 cylinder device thereof. By receiving hydraulic pressure from 33 and moving the piston rod downward, the clamp arm 32 is rotated to press both front portions of the work W from above.

After clamping the work W, the air pressure release lever 10
The work W and the pallet 1 are loaded into the loading / unloading section 1 of the first transport line 41 by removing the air supply pipe with 6 as the lock position. in this case. The pallet 1 is positioned in the conveyor, the processing section, or the assembling section by fitting the positioning reference holes 80 at the four corners to the reference pins provided on each of them.

Then, in the above production line, the unprocessed work W
Is milled and drilled on the front side with the milling machine 51 and the drilling machine 53 from the side of the first transfer line 41 in the front side processing sections 52 and 54, and on the top surface with the top surface processing sections 56, 59, 60 and 62. The shaving, the turret shaving, and the drilling from the obliquely upper side are performed, and the lower surface processing portion 64 performs the lower surface drilling processing through the through hole 37 of the pallet 1 to reach the idle portion 65.
The turret type machine tools 57, 58 arranged in the upper surface processing parts 59, 60 are those in which the turning axis of the turret is horizontal, but the work W is processed only on the upper surface of the work W. It is not necessary to change the posture of the pallet 1 while it is fixed.

Next, in the second transfer line 42, the lower surface of the work W is perforated by the lower surface processing sections 68, 69, and the side surface processing sections 72, 7 are formed.
In 3, horizontal turret type machine tools 70, 71 turret the left side of the work W, and the lower surface processing part 75 perforates the lower surface of the work W to reach the idle part 76. The turret type machine tools 70, 71 are those in which the turning axis of the turret 73 is made vertical, but are responsible for machining only the side surface of the work W.
Since the respective tools 83 of 73 can be horizontally swiveled in a horizontal state to be positioned at the machining position on the side surface of the workpiece W, even if the workpiece W is supported from below by the machining portion via the pallet 1. The side surface can be processed without interfering with W or the jig of the pallet 1, and it is not necessary to change the posture of the work W.

That is, the first transport line 41 and the second transport line 42 have different workpiece transport directions, but the workpiece W has the same orientation itself, and thus the surfaces of the workpiece W facing the sides of the line are different from each other. Therefore, the front surface processing section 5 of the first transfer line 41
2, 54 and the side surface processing sections 72, 73 of the second transfer line 42, the work W is placed on the pallet 1 without changing the orientation of the tool or the orientation of the work while the processing machines are arranged horizontally. While fixed, it is possible to machine different surfaces of the workpiece from the side of the line.

Next, in the third transfer line 43, the rear surface processing parts 78, 82-8
At 4, the rear surface of the workpiece W is milled and turreted, and the deburring section 86 deburring and cleaning the workpiece W.
The work W is washed with washing water at 88, the work W is dried at the drying unit 90 with hot air, and the unprocessed portion and the defective processing portion are detected at the unprocessed detection unit 91, and the idle unit 92 is reached.

In the third transfer line 43, the work transfer direction is different from that of the second transfer line 42, but the direction of the work W is the same. Therefore, the surface of the work W facing the line is It is the rear surface of the work W unlike the two transfer lines 41, 42. Then, the horizontal turning type turret type machine tools 79 to 81 of the rear surface processing parts 82 to 84 are those in which the turning axis of the turret 73 is made vertical, but are responsible for processing only the rear surface of the work W, Like the machine tools 70 and 71 for side surface machining, the side surface can be machined without interfering with the workpiece W or the jig of the pallet 1, and the workpiece W needs to change its posture while the pallet 1 is fixed. There is no.

Further, in the first and third transfer lines 41, 43,
Since the direction of the work W is the same and the transport direction is opposite,
In the transfer line 41, the front surface of the work W faces the inner side of the closed loop, and in the third transfer line 43, the rear surface of the work W faces the inner side of the closed loop. Workpiece W placed inside the closed loop
Different surfaces can be machined, and the space in the closed loop can be used for installing a machine, etc., and the space required for the entire machining / assembly line can be reduced.

Next, in the fourth transfer line 44, the necessary parts are assembled in the processed portion of the work W processed in the first to third transfer lines 41 to 43, and the leak detection unit 111 and the unassembled parts are assembled. It reaches the loading / unloading section 40 via the attachment detection section 112 and the cleaning section 113. In this case, the fourth transport line 44 and the preceding second transport line 42 for processing have opposite transport directions, but the first and second component assembling parts 101 and 102, and the second transport line 42. Second
Since the orientation W of the workpiece W is the same in the lower surface processing portion 68 and the side surface processing portions 72, 73, the corresponding processing machines 66, 70,
71 and the parts press-fitting machine 93, 94, one is inside the closed loop,
The other is arranged outside the closed loop. In other words, this reduces the interference with the processing machines and the like of the other transfer lines 41 and 43, while effectively utilizing the space between the two transfer lines 42 and 44 for the processing machine and the installation space of the assembly machine. The overall layout is easy and the space is small.

Further, since the same pallet 1 as the processing line portion of the work W is used in the fourth transfer line 44, the positioning reference hole 10 of this pallet 1 makes the processing reference and the assembly reference the same, and It is easy to prevent deviation between the position and the assembly position of the parts. Then, when an assembly defect due to a processing defect occurs, the processing standard and the assembly standard are the same as described above, so that the state at the time of processing can be reproduced in the assembly line portion, and the cause of the processing defect is immediately. As will be understood, it is possible to issue a command such as tool change to the machining line side.

[Brief description of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is a plan view of a pallet, Fig. 2 is a plan view of a work, Fig. 3 is a front view of the pallet, Fig. 4 is a side view of a part of the pallet, and 5 The figure is a longitudinal sectional view of a part of the pallet, and FIG. 6 is a plan view of the production line. 1 ... Pallet, 12 ... Receiving member, 13 ... Centering means, 14 ... Shifting arm, 14a ... Pushing part, 14b ... Coupling part, 15 ... Support shaft, 16 ... Rotating shaft, 17 …… Rod, 18 ……
Actuator, 18a ... Slope, 19 ... Cylinder device, 20 ...
Link member, 21 ...... first arm part, 22 ... second arm part, 38 ... spring, W ... work

Claims (1)

[Scope of utility model registration request] 1. A centering device for positioning a work so as to match a work placement portion of a preset pallet, the pair of supports being arranged in parallel on the pallet at a predetermined interval. A pair of pivot arms that are rotatably supported by the shafts and that abut the work from both sides so that the work comes to the set position of the work placement part, and parallel to the both support shafts on the pallet. And rotatably provided with a first arm portion at one end that is connected to the moving arm via a link member and a second arm portion at the other end, and each rotating arm is rotated toward the center side. Between the pair of rotating shafts for moving the rotating shafts and the second arm parts of the rotating shafts, one end is brought into contact with each second arm part in a direction orthogonal to the rotating shaft, and the other ends are opposed to each other and separated from each other. A pair of rods that are movably provided in the opposite direction and are biased in opposite directions, and that push the second arm portion to rotate the rotation shaft by moving in the directions away from each other; A work centering, which is provided between the opposite ends of the rod so as to be able to advance and retreat in a direction orthogonal to the rod, and which moves the rods in a direction in which they are separated from each other by an advancing movement. apparatus.