JPH04299900A - Positioning mechanism - Google Patents

Abstract

PURPOSE:To obtain a positioning mechanism for stepwise driving a plurality of tools in an automatic insertion equipment of electronic parts. CONSTITUTION:An engaging member 3 moving in a recessed part 1 of a first moving member 2 is made to move between a second moving member 4 moving in the same direction as the first moving member 2 and a fixing member 6. The first moving member 2 is selectively linked with the second moving member 4 and the fixing member 6. Thereby the first moving member 2 is linked with the second moving member 4, or fixed to the fixing member 6 to perform positioning. The first moving member 2 is equipped with a recessed part 1 extending in the direction almost perpendicular to the moving direction of the first moving member 2. The second moving member 4 is equipped with an engaging part 7 containing cam surface 8 and a regulation part 10 regulating the movement of the engaging member 3 in the recessed part 1. The engaging part 7 accepts an engaging member 3, engages the second moving member 4 and the first moving member 2 in the moving direction, and gives activation force for moving the engaging member 3 along the recessed part 1. The fixing member 6 is equipped with a regulation part 5 and a positioning part 11, and forms a cam surface 12.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a positioning mechanism. More specifically, the present invention relates to a positioning mechanism suitable for use as a positioning mechanism for driving a tool in stages in an automatic component insertion device or the like that automatically mounts components such as resistive elements on printed circuit boards.

0002

[Prior Art] Automatic component insertion equipment used when mounting electronic components (axial components) with coaxial lead wires, such as resistive elements, on printed circuit boards (for example, Utility Model No. 62-92685). In this method, multiple tools for cutting, bending, and inserting lead wires are simultaneously lowered and stopped and fixed at their respective predetermined positions to perform predetermined processing on the lead wire portions of electronic components. This enables automatic mounting on printed circuit boards. for example,
As shown in FIG. 8, a shearing tool 101 cuts a lead wire 105 of an electronic component 104 to a predetermined length using taping 106, and a bending tool bends the lead wire 105 aligned to a predetermined length at predetermined intervals. 102 and the insertion tool 103 for inserting the bent lead wire 105 into the hole 108 of the printed circuit board 107 are simultaneously lowered and stopped at predetermined positions one after another as shown in FIGS. 8(A) to 8(C). It is installed to perform a series of processing operations.

[0003] In such a mechanism, as a means for sequentially positioning a plurality of tools at predetermined positions, a method as shown in FIGS. 9(A) and 9(B) can be considered, for example. In the case of the mechanism shown in FIG. 9(A), the first moving member 201 and the second moving member 202, each of which has a tool attached thereto, are held by a fixed guide member 203 and are provided to be movable in the vertical direction, while the second The moving member 202 is moved up and down by a driving means (not shown), and the first moving member 20
1 is constantly lowered by the spring force of a tension spring 205 stretched between it and a fixing member 204. The second moving member 202 is provided with an engagement pin 206 that protrudes toward the first moving member 201 side.
1 is provided with a long hole 207 that is long in the direction of movement. Then, by passing the engagement pin 206 of the second moving member 202 through the elongated hole 207 of the first moving member 201, the first
The moving member 201 and the second moving member 202 are engaged in the moving direction, interlocked, and movable independently of each other within a certain range within the elongated hole 207. Therefore, when the second moving member 202 is pushed down by the driving means, the first moving member 201 connected to the second moving member 202 by the engagement pin 206 hooked on the upper edge of the elongated hole 207 is activated by the spring. They receive the force and descend together. And the stopper of the fixed member 208
When the first moving member 201 comes into contact with 209, the first moving member 201 stops descending and is positioned. Furthermore, when the second moving member 202 is lowered, the engagement pin 20
6 moves within the elongated hole 207 of the first moving member 201, and only the second moving member 202 further descends. Then, the second moving member 202 is stopped from lowering and positioned at a position determined by the driving means before or simultaneously with the engagement pin 206 coming into contact with the lower edge of the elongated hole 207.

Furthermore, the mechanism shown in FIG. 9(B) is provided with driving means 303 and 304 for each moving member 301 and 302, respectively, and drives the two moving members 301 and 304 separately.
, 302 are moved simultaneously, and one is positioned first and the other is positioned later. For example, the first and second moving members 301 and 302 are connected to the guide member 30
Cam levers 311 and 312, which are movably supported by a fixed member 306 and connected to these movable members 301 and 302 via links 309 and 310, are moved by two types of cams 307 and 308 having different displacement amounts and displacement positions. I try to drive them separately.

[0005]

[Problem to be solved by the invention] However, Fig. 9 (
In the case of the mechanism A), since the spring 205 is used as part of the drive source of the first moving member 201, problems arise in durability and positioning accuracy due to aging deterioration. Further, since the first moving member 201 is actuated by the force of the spring 205, a large external force such as galling or sticking between the guide member 203 and the first moving member 201 may occur. 1st case
There is a problem that the first movable member 201 cannot be moved and positioning cannot be performed, and even after positioning, if an upward force greater than the force of the spring 205 is applied to the first movable member 201, the tool may move. Furthermore, if the force of the spring 205 is increased, the entire mechanism including the first and second moving members 201, 202, the engagement pin 206, the driving means, etc. must be increased in size and made stronger.

Furthermore, in the case of the mechanism shown in FIG. 9(B), since driving means 303 and 304 are required for each moving member 301 and 302, there is a problem that the mechanism becomes complicated and large. Moreover,
When trying to drive the two driving means 303, 304 with one driving source, for example, the motor 313, the driving means 303,
304 For example, cams 307, 308, cam lever 311,
312, links 309, 310, a return spring (not shown), etc., and the inertia (inertial force) increases, so the motor 313 that rotates the camshaft 314
This has the disadvantage that it requires a large amount of torque, making it unavoidably large.

SUMMARY OF THE INVENTION An object of the present invention is to provide a positioning mechanism that can reliably perform positioning without being affected by external forces.

[0008]

[Means for Solving the Problems] In order to achieve the above object, the positioning mechanism of the present invention includes a first movable member having a recess extending in a direction substantially perpendicular to the direction of movement, and a first movable member that is inserted into the recess. an engaging member movable along the recess; and a driving means that moves in the same direction as the first moving member and engages the engaging member in the moving direction, and moves the engaging member along the recess. an engaging portion including a cam surface that applies a biasing force to move the engaging member; and the recess of the engaging member that comes into contact with the engaging member when the engaging member moves within the recessed portion by the cam surface and is separated from the engaging portion. a second movable member having a regulating portion that regulates movement along the second movable member; It has a regulating part that regulates movement along the recess, receives the engaging member and engages in the moving direction, fixes and positions the first moving member, and moves the engaging member into the recess. and a fixing member having a positioning portion including a cam surface that applies a biasing force to move along the position.

[0009]

[Operation] Therefore, when the second moving member is moved in a predetermined moving direction by the driving means, the first moving member is moved through the engaging member.
A moving member is coupled to a second moving member and moves together. At this time, the movement of the engaging member that has engaged with the engaging portion of the second movable member is regulated by the regulating portion of the fixed member. When the engaging member reaches the positioning portion of the fixed member, the cam surface of the second moving member moves the engaging member to the second position.
The first moving member is pushed out from the engaging portion of the first moving member, moves along the recess, and engages with the positioning portion of the fixed member to fix and position the first moving member to the fixed member. Thereafter, the regulating part of the second movable member prevents the engaging member from moving along the recess, that is, prevents the fixing member from separating from the positioning part of the fixing member, so that only the second movable member can move. do. The second moving member moves to a predetermined position determined by the drive means and its movement is stopped.

On the other hand, when the second movable member is returned to its original position by the driving means, only the second movable member slides between the engagement member and the engagement member of the second movable member. When the part reaches the position of the engaging member, the engaging member biased by the cam surface of the positioning part of the fixed member moves toward the engaging part of the second movable member, and the second movable member moves through the engaging member. The first moving member and the second moving member are connected and begin to move together. At this time, the movement of the engaging member is regulated by the restricting portion of the fixed member, so that the engaging member does not separate from the engaging portion of the second movable member.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the structure of the present invention will be explained in detail based on embodiments shown in the drawings.

FIG. 1 shows the principle of the positioning mechanism of the present invention. This positioning mechanism includes a first moving member 2 having a recess 1 extending long in a direction substantially perpendicular to the direction of movement, an engaging member 3 that is fitted into the recess 1 and movable along the recess 1, and a driving means. (not shown), a second moving member 4 moves in the same direction as the first moving member 2, and a regulating part (surface) that regulates and guides the movement of the engaging member 3 when the second moving member 4 moves. ) 5, and a fixing member 6 for fixing the first moving member 2 in a predetermined position. This positioning mechanism engages the engaging member 3 moving within the recess 1 with the second moving member 4 or the fixed member 6 while moving the second moving member 4 in the moving direction by the driving means. and the first moving member 2 are selectively connected.

The engaging member 3 is a rod-shaped piece capable of moving within the recess 1 and simultaneously engaging with the second moving member 4 or the fixed member 6, and employs, for example, a cylindrical roller such as a dowel pin. This engaging member 3 is provided so that one end thereof is accommodated in the recess 1 and can roll or slide within the recess 1. In the case of this embodiment, a cylindrical roller is used as the engaging member 3, but it is not limited to rollers in particular.
A sphere, square prism, polygonal prism, etc. can also be used as long as it spans between two members.

[0014] The first moving member 2 includes the first moving member 2
A recess 1 consisting of a long hole extending in a direction substantially perpendicular to the direction of movement of the
is formed. This recess 1 allows the first moving member 2 and the engaging member 3 to engage with each other in the moving direction of the first moving member 2, and in the case of this embodiment, it is constituted by an oval groove with a bottom. However, the present invention is not particularly limited to this, and even a long hole penetrating the first member in the thickness direction can be used.

On the other hand, the second moving member 4 is provided with an engaging portion 7 for receiving the engaging member 3 moving within the recess 1. The engaging portion 7 is composed of, for example, a groove opened in the longitudinal direction of the recess 1, and the engaging member 3 is inserted into the engaging portion 7.
A cam surface 8 is included which applies a force to extrude from the surface. The shape of the engaging portion 7 is not particularly limited to that shown in the drawings, but the engaging surface 9 and the engaging member engage when the engaging member 3 moves on the regulating portion 5 of the fixed member 6. 3 and a cam surface 8 that applies a force to push out from the engaging portion 7. Further, when the engaging member 3 engages with the engaging portion 7 of the fixed member 6, the engaging member 3 is located above the engaging portion 7 of the second movable member 4 (closer to the driving means side). A regulating portion 10 is provided that regulates movement along the recessed portion 1. This regulating portion 10 is constituted by, for example, a surface on which the engaging member 3 rolls or slides.

The fixed member 6 also has an engaging portion 7 of the second movable member 4 when the first movable member 2 reaches a predetermined position.
A positioning portion 11 is provided for receiving the engaging member 3 therefrom. This positioning part 11 is, for example, the second moving member 4
The cam surface 12 is formed of a groove facing the engaging portion 7, and is provided with at least a cam surface 12 that moves within the recess 1 relative to the engaging member 3 and pushes it out of the engaging portion.

The first moving member 2 and the second moving member 4
For example, as shown in FIG. 2, the engaging members 3 are arranged in the longitudinal direction (direction perpendicular to the plane of the drawing), with the first moving member 2 at one end of the engaging member 3 and the first moving member 2 at the other end. 2 moving member 4
and the fixing members 6 are arranged to face each other. One end of the engaging member 3 engages with the recess 1 of the first moving member 2, and the other end engages with either the engaging portion 7 of the second moving member 4 or the positioning portion 11 of the fixed member 6. Set up to get.

With the above configuration, positioning is performed as follows.

First, the second moving member 4 is moved by the driving means.
is moved in a predetermined direction, for example, in the direction of the arrow shown in FIG. 1(A). Note that a motor, a cylinder, etc. can be used as the driving means. The engaging member 3 is the engaging portion 7 of the second moving member 4
is in contact with the cam surface 8 of the fixing member 6 and the regulating portion 5 of the fixing member 6, and slides or rolls on the regulating portion 5 of the fixing member 6. As the second moving member 4 moves, the first moving member 2 connected via the engagement member 3 also descends. When the first movable member 2 comes into contact with a stopper 14 fixed to the device main body 13 or the like, the positioning portion 1 of the fixed member 6
1, the engaging member 3 reaches the engaging portion 7 of the second moving member 4
The engaging member 3 moves within the recess 1 toward the positioning portion 11 by the action of the cam surface 8 , and is pushed into the positioning portion 11 of the fixing member 6 . Then, while the engaging member 3 moves along the cam surface 12 of the positioning part 11, the first moving member 2 is pushed down, and the first moving member 2 is brought into contact with the perforator 14 to complete positioning. Then, upon completion of the engagement between the engaging member 3 and the positioning portion 11 of the fixing member 6, the fixing member 6 is fixed to the first moving member 2 via the engaging member 3. The tool 15 fixed to the first moving member 2 is then positioned.

Although the above-described embodiment is an example of a preferred implementation of the present invention, the present invention is not limited thereto, and various modifications can be made without departing from the gist of the present invention. For example, depending on the shape of the groove of the positioning portion 11, the perforator 14 provided on the device main body side or the mating member can be omitted. For example, like the engaging part 7, a contact part may be formed on the edge of the positioning part 11 of a member such as the fixing member 6, on which the positioning part 11 is provided, so as to protrude toward the other member. Further, in this embodiment, the structure shown in FIG. 1 is the minimum unit, and it is also possible to combine a plurality or a large number of them.

Furthermore, when the second movable member 4 is moved by the driving means, since the first movable member 2 is connected to the fixed member 6 side via the engagement member 3, the second movable member 4 is moved. only moves in the direction of the arrow in FIG. 1(A). Then, the position is determined by stopping the driving means. The stop position of the second moving member is determined in advance by the driving means, and is detected by a sensor or the like provided on the driving means side or near the tool 16 attached to the second moving member 4.

[0022] Next, the driving means is reversed and the drive means shown in Fig. 1(B)
When the second moving member 4 is driven in the direction shown by the arrow, only the second moving member 4 starts moving in the direction of the arrow. Next, when the contact surface 9 of the engaging part 7 of the second moving member 4 abuts against the engaging member 3 fitted into the positioning part 11 of the fixed member 6,
The engaging member 3 is pressed against the cam surface 12 of the positioning portion 11 and is pushed out toward the engaging portion 7 side of the second moving member 4 . As a result, the engaging member 3 moves within the recess 1 and fits into the engaging portion 7 of the second moving member 4, thereby connecting the first moving member 2 to the second moving member 4. Then, the first moving member 2
The connection relationship between the and second movable member 4 is such that the engagement member 3 is not pushed out from the engagement portion 7 of the second movable member 4 by sliding or rolling on the regulating portion 5 of the fixed member 6. In order to move, the second moving member 4 and the first moving member 2 move together in the direction of the arrow and return to the initial position state.

Next, a more specific example in which the positioning device of the present invention is implemented in an automatic component insertion device is shown in FIGS. 3 to 7. In this embodiment, two sets of positioning devices of the present invention are combined and applied to an automatic component insertion device, so that three tools are simultaneously moved and positioned individually.

This positioning mechanism includes a first moving member 21 to which a lead wire shearing tool (cutter) 26 is attached, a second moving member 22 to which a bending tool 27 is attached, and an insertion tool 28 to which is attached. The device includes a third moving member 23, a fixed member 20, a guide member 24 that holds the first moving member 21 movably in a predetermined direction, and a device main body 25 that supports them. A first moving member 31 is provided between the first moving member 21, the second moving member 22, and the third moving member 23, and a fixed member is provided between the second moving member 22, the first moving member 21, and the third moving member 23. A second engaging member 32 is provided between the first and second engaging members 3 and 20, respectively.
The movable members 21, 22, 23 are interlocked to a predetermined position by movement within the concave portions 33, 34 of No. 1, 32, and thereafter only an arbitrary movable member is further moved. The first moving member 21, which the first engaging member 31 straddles, is provided with a positioning portion 35, and the third moving member 23 is provided with an engaging portion 36. Further, the second moving member 22 that the second engaging member 32 straddles has an engaging portion 3 .
7, the fixing member 20 is provided with a positioning portion 38. Then, the second engaging member 32 accommodated in the recess 33 formed in the first moving member 21 moves between the fixed member 20, the positioning part 38, and the engaging part 37 of the second moving member 22. , the first engaging member 32 accommodated in the recess 34 formed in the second moving member 22 is between the engaging part 36 of the third moving member 23 and the positioning part 35 of the first moving member 21. is set up to move. Moreover, between the fixed member 20 and the second moving member 22, between the second moving member 22 and the third moving member 23, between the third moving member 23 and the first moving member 21, and First moving member 21 and guide member 2
Guide rollers 30 are installed between the first
, second and third moving members 21, 22, and 23 are attached to the gantry main body 25 so as to be able to move smoothly in the same direction. In addition, the device main body 25 includes a first moving member 21.
A stopper 43 is provided for positioning the second moving member 22 , and a stopper 44 for positioning the second moving member 22 is formed on the first moving member 21 . Note that the positioning of the third moving member is normally performed by a driving means. Further, reference numerals 39, 40, 41, and 42 are regulating portions.

A cutter 26 is provided on the bottom of the first moving member 21, a bending tool 27 is provided on the bottom of the second moving member 22, and an insertion tool 2 is provided on the bottom of the third moving member 23.
8 are fixed respectively. The tip 29 of the driving means is fixed to the third moving member 23, and the driving means 29
6(A) and 6(B) guided by the guide roller 30.

Furthermore, recesses 33 and 34 are formed in the first moving member 21 and the second moving member 22, and the recesses 33 and 34 are formed of elongated holes extending perpendicularly to the direction of movement of these members. The engaging portions 36, 37 of the second movable member 22 and the third movable member 23 or the fixed member 20 and the first
It is provided to selectively engage with either of the positioning parts 35, 38 of the moving member 21 to have a connection relationship in the moving direction, and to be interlocked or fixed. In this embodiment, only one set of each of the first and second engaging members 31 and 32 is shown for convenience of explanation, but two or more sets of each of the first and second engaging members 31 and 32 are usually arranged symmetrically.

With the above structure, the third moving member 23 is moved as shown in FIG. 6(A) by the operation of the driving means 29.
When pushed down in the direction of the arrow, the engaging member 32 that engages with the engaging portion 37 of the second moving member 22 and the engaging member 31 that engages with the engaging portion 36 of the third moving member 23 move the 1, the second and third moving members 21, 22, and 23 are connected and simultaneously lower to simultaneously move the cutter 26, bending tool 27, and insertion tool 28 toward the electronic component 45 and shear block 47 below. Move (see Figure 6(A))
. Then, when the cutter 26 reaches the position of the shear block 47 that supports the lead wire 46 of the electronic component 45, the second engaging member accommodated in the recess 33 of the first moving member 21 as shown in FIG. 32 is pushed out by the cam surface 49 of the engaging portion 37 of the second moving member 22, and the fixed member 20
to the positioning section 38 side. And the positioning part 3
The second engaging member 3 is pushed along the cam surface 51 of 8.
After the first movable member 21 is pushed down to a predetermined position and positioned by the movement of step 2, the fitting of the second engaging member 32 into the positioning portion 38 is completed, and the first movable member 21 is moved to the fixed member 20. Fixed to. Note that the first moving member is the device main body 2.
It is positioned by contacting the contact part 43 of No. 5 (Fig. 6 (
See B). This allows the cutter 26 to cut the electronic component 45.
The lead wire 46 is cut to a predetermined length and bent slightly. Reference numeral 48 is a jig that supports the electronic component 45.

Next, when the third moving member 23 is further pushed down, since the first moving member 21 and the fixed member 20 are connected by the second engaging member 32, the second moving member 22 and Only the third moving member 23 is lowered together. Then, the first engaging member 31 accommodated in the recess 34 formed in the second moving member 23 is pushed by the cam surface of the engaging portion 36 of the third moving member 23, and the first engaging member 31
is pushed into the positioning part 35 of. At this time, the second moving member 22 is positioned by coming into contact with the abutting portion 44 on the first moving member 21, similar to the movement of the first moving member 21 described above. Therefore, the bending tool 27 fixed to the second moving member 22 is pushed down to a predetermined position, and is supported by the insertion tool 28 between it and a bending jig (not shown) installed at a predetermined position. Lead wire 46 of electronic component 45
Fold the part (see Figure 7(C)).

Furthermore, the third moving member 23 is a driving means 29
When pushed down by the first and second engaging members 3
The first and second moving members 2 fixed by 1 and 32
Only the third moving member 23, leaving the members 1 and 22, descends. Then, the electronic component 45 held by the insertion tool 28 is inserted into a predetermined hole on a printed circuit board (not shown) and mounted. After that, although not shown, the portion of the printed circuit board that has passed through is bent using a bending jig or the like.

Each tool is returned to its original position by pulling up the third moving member 23 by the driving means 29. First, the first engaging member 31 is pressed against the cam surface of the positioning part 35 of the first moving member 21 with the force of the engaging part 36 of the third moving member 23, and the third moving member is moved from the positioning part 35 23 into the engaging portion 36 to release the fixation of the second moving member 22. At the same time, the third moving member 23 and the second moving member 22 are connected by the first engaging member 31 and raised together. Then, the second engaging member 32 that engages the first moving member 21 and the fixed member 20 is pushed up by the abutment part 50 of the engaging part 37 of the second moving member 21, and the positioning part of the fixed member 20 is pushed up. 38 and the engaging portion 37 of the second moving member 22 is pressed against the cam surface 51 of the second moving member 22 from the positioning portion 38
The second engaging portion 32 is moved to release the connection between the first moving member 21 and the fixed member 20. At the same time, the first moving member 21 and the second moving member 22 are connected to the second engaging member 32.
Connect by. Then, the first and second moving members 21 and 22 are returned to the predetermined positions together with the third moving member 23.

[0031]

As is clear from the above description, the positioning mechanism of the present invention allows a plurality of movable members to be separated by a fixed member and a movable member using an engaging member that is movable and straddles between them. Since the device is selectively connected to the device for interlocking or positioning, it is possible to reliably position the device without being affected by external force from sources other than the external force driving means. In addition, by driving one moving member, all the moving members are interlocked and positioned and fixed at arbitrary positions, so the driving section becomes compact and simple.

[Brief explanation of drawings]

FIG. 1 is a principle diagram of a positioning mechanism of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG. 1;

FIG. 3 is a plan view of a component insertion device implementing the positioning mechanism of the present invention.

4 is an explanatory diagram showing the relationship between an engaging member, an engaging portion, and a positioning portion of the positioning mechanism shown in FIG. 2. FIG.

FIG. 5 is an enlarged plan view of the main part of FIG. 2;

FIG. 6 is a sectional view taken along the line VI-VI in FIG. 2;

7 is an explanatory diagram showing a state in which the cutter has been lowered to a predetermined position in the component insertion device of FIG. 6; FIG.

FIG. 8 is an explanatory diagram showing the operating state of each tool in the component insertion device.

FIG. 9 is a schematic diagram of a conventional positioning mechanism that separately operates two moving members.

[Explanation of symbols]

1 Recessed part 2 First moving member 3 Engagement member 4 Second moving member 5 Regulation Department 6 Fixed member 7 Engagement part 8 Cam surface 9 Regulatory Department 10 Regulatory Department 11 Positioning part 12 Cam surface

Claims (1)

[Claims] 1. A first movable member having a recess extending in a direction substantially perpendicular to the direction of movement; an engaging member that is fitted into the recess and movable along the recess; an engaging portion including a cam surface that moves in the same direction as the moving member, engages the engaging member in the moving direction, and applies a biasing force to move the engaging member along the recess; a second moving member having a regulating portion that comes into contact with the engaging member when the engaging member moves within the recessed portion by the cam surface and disengages from the engaging portion and restricts movement of the engaging member along the recessed portion; , a regulating portion that comes into contact with the engaging member when the engaging member is engaged with the engaging portion of the second movable member and restricts movement of the engaging member along the recessed portion; A fixing device having a positioning portion including a cam surface that receives a member, engages in the moving direction, fixes and positions the first moving member, and applies a biasing force to move the engaging member along the recess. A positioning mechanism characterized by comprising a member.