JPH0532182B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a tool selection device of a type in which a plurality of tools protrude radially from a turret, and a suitable tool is selected by rotating the turret. Vacuum suction collets are often used as tools in the electronic circuit board assembly process.

(B) Prior Art An example of a tool selection device as described above in which a vacuum suction collet is used as the tool is coupled to an electronic component mounting device is disclosed in Japanese Patent Application Laid-open No. 197329/1983. In this example, a total of four tools are projected at 90° intervals from a turret that rotates around a horizontal arm, and the tools facing straight down are used to pick up parts. One of the four tools is selected by rotating the turret, but after selection,
It is necessary to lock the turret to prevent the tool from wobbling. Therefore, a lock pin biased by a spring in the direction of engagement with the turret is supported on the upper surface of the arm, and when the turret is rotated, the lock pin is slid against the bias force to release the lock. In this configuration, since the lock pin is overlapped on the upper surface of the arm, the arm needs to be longer than a certain degree, making it difficult to design it with high rigidity.

(c) Problems to be Solved by the Invention The present invention provides a tool selection device that selects a tool by rotating a turret, in which the arrangement of the turret lock pin does not conflict with ensuring the rigidity of the device, and the lock pin is The aim is to provide a configuration that is easy to access.

(d) Means for Solving the Problems In the present invention, one end surface of the turret is provided with a rotationally transmitted portion, and the other end surface is provided with a plurality of engaging portions corresponding to each of the tools. The turret is rotatably mounted on a mounting shaft protruding from a support member. The support member also supports a locking pin, which is biased by a spring to engage one of the engaging portions.
Insert the lock release pin into the center of the mounting shaft where it will engage with the lock. One end of the lock release pin protrudes toward the side where the rotationally engaged part is located, and the other end is connected to the lock pin via a connecting body. A rotation transmitting member and a pressing member are arranged on the outside of the turret at positions facing the rotation transmitted portion and the lock release pin, respectively.

(e) Effect When changing tools, the rotation transmitting member connects to the rotation transmitted part, and the pressing member pushes the lock release pin. As the lock release pin slides, the lock pin also moves and is removed from the engagement portion. This results in
The turret is now free to rotate and obtains a predetermined angle of rotation from the rotation transmission member to place the new tool in a position for use.

(f) Example In the figure, 1 has four tools 2, 3, 4, 5.
These are turrets that protrude radially at 90° intervals.
The tools 2, 3, 4, and 5 are vacuum suction collects, and each has a different shape so that it can handle a wide variety of electronic components. Each of the tools 2, 3, 4, and 5 can be retracted toward the center of the turret 1, and is normally pushed to the maximum protruding position by a spring 6.
Each tool 2, 3, 4, 5 is associated with an independent vacuum suction passage 7. As shown in FIGS. 4 and 5, the vacuum suction passage 7 is bent at a right angle from the tool axis direction, and then bent again at a right angle to open at the back surface of the turret 1. A rotation transmitted portion 8 is provided on the front side of the turret 1. This consists of spur gears. A total of four engaging portions 9 are provided on the back surface of the turret 1, corresponding to the respective tools 2, 3, 4, and 5. This is done by stacking and fixing the disk 10 on the turret 1, and making a 90° angle around it.
It is constructed by forming grooves at intervals. Note that identification marks 11, 12, 13, and 14 are attached to the front surface of the rotationally transmitted portion 8 at positions corresponding to the respective tools 2, 3, 4, and 5. The identification marks 11, 12, 13, and 14 are constituted by coded dot patterns having one to three drill holes.

20 is a support member that supports the turret. A horizontal mounting shaft 21 projects from the support member 20, and the turret 1 is rotatably supported on the outside of this mounting shaft 21 via two ball bearings 22. The support member 20 is suspended from a rotary index table (not shown) by a rod 23 and rotates in a horizontal plane. The mounting shaft 21 faces outward when viewed from the center of rotation. Note that the rod 23 also provides vertical movement to the support member 20. The support member 20 supports the lock pin 24 in parallel to the mounting shaft 21. The lock pin 24 is slidable in the axial direction, has a connecting body 25 fixed near the center, and is biased toward the turret 1 by a compression coil spring 26 inserted between the connecting body 25 and the support body 20, so that it is engaged. It engages with one of the joints 9 and fixes the turret 1 without rattling. The connecting body 25 holds a vacuum suction pipe 27, and when the lock bin 24 is engaged with the engaging portion 9, the vacuum suction pipe 27 is held.
The suction cup 28 at the tip of is in close contact with the back of the turret 1,
It communicates with the tools 2, 3, 4, and 5 facing directly below through a vacuum suction passage 7. The vacuum suction pipe 27 is connected to a vacuum source (not shown) via a hose 29. The end of the connecting body 25 is thinly shaved, and a slotted groove 3 is formed at the rear end of the mounting shaft 21.
It's getting to 0. The mounting shaft 21 is hollow,
A lock release pin 31 is inserted into the center hole. The lock release pin 31 is stepped, and a tapered tip protrudes from the side where the rotationally transmitted part 8 is located. The rear end of the lock release pin 31 is in contact with a connecting body 25 inserted into the mounting shaft 21.

40 is a support frame installed at a particular work station. The main purpose of the support frame 40 is to support a rotationally transmitted member 41 connected to the rotationally transmitted portion 8 and a pressing member 42 that presses the lock release pin 31, and the related structure will be described below. The rotationally transmitted member 41 is a spur gear, and is supported by a rotating shaft 44 at the tip of the lever 43 . The lever 43 swings in a vertical plane using the shaft portion 45 as a fulcrum. A tension coil spring 46 stretched between the tip of the lever 43 and the support frame 40 pulls the lever 43 downward, and a connecting rod 47 connected to the middle part of the lever 43 pulls the lever 43 upward. It's summery. The upper end of the connecting rod 47 is connected to a cam device (not shown), which applies rocking motion of a predetermined stroke to the lever 43 at a predetermined timing. Behind the lever 43, a driven timing pulley 48 is fixed to the rotating shaft 44, a driving timing pulley 49 is fixed to the shaft portion 45, and both are connected by a timing belt 50. Drive timing pulley 4
9 is rotated by an electric motor (not shown), and transmits rotation of a predetermined angle to the driven timing pulley 48. The pressing member 42 is fixed to the lower end of the seesaw lever 51. The seesaw lever 51 swings in a vertical plane with the shaft portion 52 as a fulcrum like the lever 43, but the direction of its swinging surface is perpendicular to the swinging surface of the lever 43. A tension coil spring 5 is installed between the upper end of the seesaw lever 51 and the support frame 40.
3 is stretched, and this causes the seesaw lever 51
is biased in a direction to swing out the lower end pressing member 42 toward the turret 1. Seesaw lever 51
An arm 54 having a roller 55 at its tip protrudes from the back side of the holder. The roller 55 is pushed up by a roller 56 at the tip of the lever 43. Lever 4
3 is in the raised position, the seesaw lever 51
takes the position of separating the pressing member 42 from the turret 1, and when the lever 51 shifts to the lowered position, the position of the seesaw lever 51 also changes and the pressing member 42 is moved away from the turret 1.
approaches turret 1. 57 is a stopper that limits the rotation range of the seesaw lever 51. 58
are identification marks 11, 12, 1 on the front of turret 1.
This is an identification sensor consisting of a total of three optical fiber sensors installed at positions facing one of the sensors No. 3 and 14.

The above device operates as follows. When the turret 1 arrives and stops when the lever 43 is in the raised position as shown in FIG. . Here, when the connecting rod 47 is lowered, the lever 43 swings downward, the rotation transmission member 41 is connected to the rotation transmitted part 8 as shown in FIG. 3, and the seesaw lever 51 is pulled by the spring 53 and swings. Then, push the lock release pin 31 with the pressing member 42. The lock release pin 31 pushes the connecting body 25 as it retreats and releases the lock pin 24 from the engagement portion 9. The suction cup 28 also separates from the turret 1. At this time, the suction action of the vacuum suction pipe 27 is cut off by the action of a valve device (not shown). As a result, the turret 1 is completely rotatable, and the rotation transmitting member 41 can impart rotation to the turret 1 through a predetermined angle.
The identification sensor 58 confirms whether the tool according to the command is ready for use. When the lever 43 is raised after the tool changing operation is completed, the rotation transmitting member 41 and the pressing member 42 are separated from the rotation transmitted part 8 and the lock release pin 31, and the lock pin 24 moves forward and engages with the new engaging part 9. , the suction cup 28 also comes into close contact with the turret 1 to form a connection with the downwardly directed tool.

(G) Effects of the Invention According to the configuration of the present invention, the lock pin is arranged parallel to the turret mounting shaft, but since it is not necessary to overlap the lock pin on the top surface of the mounting shaft, it is possible to attach the mounting shaft from a hanging support member. Even with a protruding configuration, there is no need to extend the mounting shaft long to secure a space for arranging the lock pin, and the degree of protrusion can be kept to a minimum, making it easy to achieve a highly rigid design. Also, since the lock release pin protrudes from the end face of the turret, there is no need to wrap the lock release member around the back side of the turret.
The layout design of such operating members is also easy.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, with FIG. 1 being a front view of the turret, FIGS. Figures 4 and 5 are partially cutaway bottom views of the turret and support member in different operating states, Figure 6 is a partial perspective view, and Figures 7 and 8 are schematic views showing different operating states. It is a partially broken front view. 1... Turret, 2, 3, 4, 5... Tool, 8
... Rotation transmitted part, 9 ... Engagement part, 20 ... Support member, 21 ... Mounting shaft, 24 ... Lock pin, 2
6... Spring, 31... Lock release pin, 25...
Connecting body, 41... Rotation transmission member, 42... Pressing member.

Claims (1)

[Claims] 1. A tool selection device having the following configuration. (a) While making multiple tools protrude radially,
(b) A turret having a rotationally transmitted part on one end face and a plurality of engaging parts corresponding to each of the tools on the other end face, protruding from the support member and allowing the turret to freely rotate. A mounting shaft (c) supported by the support member so as to be slidable in the axial direction parallel to the mounting shaft, and engaged with one of the engaging portions of the turret under the force of a spring. (d) A lock release pin that is inserted into the center of the mounting shaft so as to be able to slide in the axial direction, and has one end protruding toward the side where the rotationally transmitted part is present; (e) A lock release pin that is inserted into the center of the mounting shaft so as to be able to slide in the axial direction; a connecting body (f) that connects the lock pins so that a pressing force that resists the biasing force of the spring is applied from the lock release pin to the lock pin;
Rotation transmitting member (g) that is connected to the rotation-transmitted part and gives rotation of a predetermined angle to the turret during tool conversion.It is placed in a position facing the protruding end of the lock release pin, and is used to engage the lock pin by pushing the lock release pin during tool conversion. A pressing member for separating from the joint.