JPH04107353A - Reciprocating mechanism and support mechanism - Google Patents

Abstract

PURPOSE:To change the position of output reciprocating movement without changing the position of an input reciprocating motion by exerting an input reciprocating motion on an input point by means of a link and causing an output reciprocating motion of a first member by means of the one end part. CONSTITUTION:Engagement of a link 3, having an input point 4 which is located in the middle and on which an input reciprocating motion is exerted, with a first member 1 is a rolling contraposition where the surface, crossing a first linear line L1 at right angles, of the first member 1 forms a rolling surface 1a. Engagement of the link 3 with a second member 2 is a rolling contraposition where the surface, crossing a second linear line L2 at right angles, of the second member 2 forms a rolling surface 2a. A link 3 is supported to a third member 5, movable over a third linear line L3 paralleling the first linear line L1, by a rotating contraposition where the input point 4 is supported by means of a bearing. This constitution changes the position of an output reciprocating motion without changing the position of an input reciprocating motion regarding a reciprocating mechanism which is incorporated in a machine device and performs an output reciprocating motion by exerting an input reciprocating motion.

Description

[Detailed Description of the Invention] [Summary] This invention relates to a reciprocating mechanism that is incorporated into a mechanical device and performs an output reciprocating motion by applying an input reciprocating motion, and a support mechanism using the same, without changing the position of the input reciprocating motion. The purpose of the reciprocating mechanism is to make it possible to change the position of output reciprocating motion, and the reciprocating mechanism includes a first member that is movable on a first straight line and performs output reciprocating motion, and a first member that is movable on a first straight line and that performs output reciprocating motion, and a second member that can be fixed at any position on the second straight line, one end of which is engaged with the first member, the other end of which is engaged with the second member, and an input point provided in the middle; a link to which an input reciprocating motion is applied;
The engagement of the link with the first member is a rolling pair whose rolling surface is a surface provided on the first member perpendicular to the first straight line, and the engagement of the link with the second member is a rolling pair. second to the member
A rolling couple whose rolling surface is a surface provided perpendicular to the straight line, and the link includes a third link that is movable on a third straight line parallel to the first straight line by the rolling couple that pivots on the input point. The link is configured to be supported by the second member, or the link is configured to be engaged with the second member in a rotating pair that pivotally supports the link, and is configured to be supported by the second member, In the support mechanism, the two former reciprocating mechanisms face each other with the first and second straight lines in common, and a cam is disposed between them to symmetrically apply an input reciprocating motion to the two input points. , and claws provided on each of the two first members to clamp the workpiece as the mutual interval narrows as the output reciprocates.

[Industrial application field]

The present invention relates to a reciprocating mechanism that is incorporated into a mechanical device and performs an output reciprocating motion by providing an input reciprocating motion, and a support mechanism using the reciprocating mechanism.

A mechanical device such as a lead frame handling device used in the manufacture of semiconductor devices incorporates the reciprocating mechanism or a support mechanism using the reciprocating mechanism for operations such as laterally holding a lead frame as a workpiece. In order to enable handling even when lead frames have different widths, it is desired to be able to change the position of the output reciprocating motion.

[Conventional technology]

FIG. 4 is a schematic block diagram of a conventional example of the above-mentioned reciprocating mechanism, and FIG. 5 is a schematic diagram of a support mechanism that is an example of use of the conventional example.

In FIG. 4, this conventional reciprocating mechanism has a movable member 11 that is movable on a straight line, and by applying an input reciprocating motion X, ゎ to an input point 12 provided on the movable member 11, the movable member 11 is the output reciprocating motion X. This is for performing uL.

This reciprocating mechanism is used, for example, as a support mechanism in a lead frame separation mechanism previously proposed by the applicant of the present invention in Japanese Patent Application No. 1-184147.

As shown in FIG.
A cam 14 having an axisymmetric shape is arranged between the rollers 12a provided at each input point 12, and a tension spring 13 is applied between the movable members 11A and IIB. Due to the rotation of the moving member 11A, II
B is symmetrically reciprocated to move the moving member 118.

The claws 15A and 15B provided on the lead frame 11B are designed to sandwich the workpiece, the lead frame 10, from the lateral direction.

[Problem to be solved by the invention]

However, in this support mechanism, the interval between the claws 15A and 15B that reciprocate symmetrically is regulated by the dimensions of the cam 14,
Lead frames 10 that can be used are limited to those with a specific width. For this reason, if the width of the lead frame 10 differs depending on the lot, there is a problem in that a different size of cam 14 must be prepared for each width.

In order to solve this problem, for example, it may be possible to change the interval between the pawls 15A and 15B that reciprocate symmetrically without changing the cam 14. This is a matter regarding the positional relationship between the input reciprocating motion (X, .) and the output reciprocating motion (X.ut).

Therefore, an object of the present invention is to provide a reciprocating mechanism that performs an output reciprocating motion by applying an input reciprocating motion, in which the position of the output reciprocating motion can be changed without changing the position of the input reciprocating motion. It is an object of the present invention to enable the above-mentioned support mechanism to be used in common even when the widths of the workpieces to be held are different.

[Means to solve the problem]

In order to achieve the above object, the reciprocating mechanism of the present invention includes a first member that is movable on a first straight line and performs an output reciprocating motion;
a second member that can be fixed at any position on a second straight line parallel to the first straight line; one end engages with the first member, the other end engages with the second member, and an intermediate and a link to which an input reciprocating motion is applied to a provided input point, and the engagement of the link with the first member is a rolling pair whose rolling surface is a surface provided on the first member perpendicularly to the first straight line. and the engagement of the link with the second member causes the second member to have a second
A rolling couple whose rolling surface is a surface provided perpendicular to the straight line, and the link includes a third link that is movable on a third straight line parallel to the first straight line by the rolling couple that pivots on the input point. It is characterized by being supported by a member.

Alternatively, the link is characterized in that the engagement with the second member is a rotating pair that pivotally supports the link, and is supported by the second member.

Preferably, the second member is screwed into a feed screw arranged parallel to the second straight line, and the fixing position is determined by operating the feed screw.

Further, in the support mechanism, the two former reciprocating mechanisms face each other with the first and second straight lines in common, and are disposed between them to symmetrically apply input reciprocating motion to the two input points. It is characterized by having a cam and claws provided on each of the two first members to clamp the workpiece as the mutual interval narrows as the output reciprocates.

[For production]

The above link shows that if input reciprocating motion is applied to the intermediate input point,
Operating as a lever using the other end as a fulcrum, the one end causes the first member to perform an output reciprocating motion. However, the position of the fulcrum changes depending on the fixed position of the second member.

Note that the above-mentioned rotating pair or rolling pair is a term indicating the form of the bearing part (pair) in a link mechanism. A rolling couple is one in which one of the two members is pivotally supported and the shaft is movable parallel to the rolling surface of the other member, allowing the two members to swingably engage each other. .

Therefore, the reciprocating mechanism described above can change the position of the output reciprocating motion without changing the position of the input reciprocating motion by changing the fixed position of the second member.

The use of the feed screw facilitates adjustment when changing the fixing position of the second member.

Therefore, the support mechanism using this reciprocating mechanism can be used in common even when the widths of the workpieces to be held are different, as will be described later.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 3. FIG. 1 is a schematic diagram of the first embodiment, FIG. 2 is a schematic diagram of a support mechanism that is an example of the use of the first embodiment, and FIG. 3 is a schematic diagram of the second embodiment.

In FIG. 1, 1 is a first line that can move freely on a first straight line L+
A member corresponding to the moving member 11 of the conventional example, 2 is the first
A second member 3 that can be fixed at any position on a second straight line L2 parallel to the straight line L1 has one end 3a engaged with the first member 1 and the other end 3b engaged with the second member 2. and input point 4 in the middle
This is a link with .

The link 3 is connected to the first
It is supported by a third member 5 that is movable on a third straight line parallel to the straight line. The engagement of the end portion 3a with the first member l is a rolling pair in which the surface provided on the first member 1 perpendicular to the first straight line L1 is the rolling surface 1a, and the engagement with the second member l of the end portion 3b is a rolling pair. 2, the second member 2 is engaged with the second straight line L.
This is a rolling pair in which a surface provided orthogonally to 2 is a rolling surface 2a.

The second member 2 is threadedly engaged with a feed screw 6 arranged parallel to the second straight line L2, and is moved by rotation of the feed screw 6 and fixed at an arbitrary position.

Further, a tension spring 7 is applied to the first member 1 so that the rolling pairs of the end portions 3a and 3b operate correctly.

In the embodiment configured as described above, if an input reciprocating motion X in in the direction of the third straight line L3 is applied to the input point 4 while the second member 2 is fixed at an appropriate position, the first member 1 At a position determined by the fixed position of the second member 2, an output reciprocating motion X.ut is performed in the first straight line L1 direction with a movement amount that is [(A+B)/B1 times the input reciprocating motion X i fi [However, A
is the distance from the end 3a to the input point 4, and B is the distance from the input point 4 to the end 3b]. However, the similarity is always maintained between the input reciprocating motion X in and the output reciprocating motion X out . Then, when the fixed position of the second member 2 is changed, the position of the first member 1 is changed, resulting in an output reciprocating motion X. The position of at changes, and the above state also holds true in that state.

Therefore, if this embodiment is used in the support mechanism described in FIG. 5, it can be used in common even when the width of the lead frame 10 (workpiece) differs depending on the loft.

An exemplary support mechanism for its use is shown in FIG.

That is, two first members 1 (indicated by LA and IB, respectively) are placed on a first straight line, and two second members 2 (indicated by 2A and 2B, respectively) are opposed to each other on a second straight line L2. Then, the link 3 as described above is arranged in each pair of the first member 1Δ or IB and the second member 28 or 2B, and an axially symmetrical cam is placed between the rollers 4a provided at the respective input points 4. 8, and a tension spring 7 is hooked between the second members 2A and IB. The second members 2A, 2B are parallel to the second straight line L2, and are threadedly engaged with a feed screw 6 having one right-hand thread and the other left-hand thread, and are mutually opened or closed by rotation of the feed screw 6. It can be moved and fixed at arbitrary intervals. Furthermore, claws 9A and 9B are provided on the first members IA and IB.

Then, as the cam 8 rotates, the first members 1Δ, IB perform symmetrical output reciprocating motion, and when the distance between the first members 1Δ, IB narrows, the claws 9A, 9B engage the lead frame 10.
is held from the side. At that time, the first member 1Δ, IB
It is necessary that the interval between the lead frames 10 and 10 matches the width of the lead frame 10, and the interval can be adjusted by rotating the feed screw 6.

Therefore, this support mechanism can be used in common by operating the feed screw 6 even when the lead frames 10 have different widths.

Next, in FIG. 3, this second embodiment is a simplified version of the first embodiment, in which the third member of the first embodiment is omitted and the link 3 is supported by the second member 2. , the engagement of the end portion 3b with the second member 2 is a rotating pair that pivotally supports the end portion 3b. Therefore, the movement locus of the input point 4 is an arc with the end 3b as the center and the distance B as the radius.

As a result, if an input reciprocating motion X, ゎ along the circular arc is applied to the input point 4 with the second member 2 fixed at an appropriate position, the first member 1 will move from the fixed position of the second member 2. At the determined position, the input reciprocating motion X, , approximately [(A+
8) Output reciprocating motion X in the direction of the first straight line with a travel amount that is 1 times /B. Do ut. Then, when the fixed position of the second member 2 is changed, the position of the first member 1 is changed, resulting in an output reciprocating motion X. u
The tO level changes.

However, compared to the first embodiment, the input reciprocating motion
i n and output reciprocating motion X. There is a difference in that the similarity between the second member 2 and ut is inaccurate, and the aspect of the deviation differs depending on the fixed position of the second member 2.

From this, the use of the first embodiment or the second embodiment should be selected based on the requirements of the target mechanical device, and the output reciprocating motion X. . If there is no need to strictly define aspects during the process, the second embodiment, which has a simpler configuration, is more advantageous.

In the above description, the usage example of the embodiment is shown in FIG. 2 in which two parts are opposed to each other, but it is often sufficient to use them alone, for example, when feeding a handling object with a claw. In addition, in the case of the support mechanism used in the above usage example, the input reciprocating motion X1. Although the cam 8 is used as the drive source for boat fishing, an actuator other than the cam, such as an air cylinder or a solenoid, may be used as the drive source for boat fishing.

〔Effect of the invention〕

As explained above, according to the present invention, regarding a reciprocating mechanism that is incorporated in a mechanical device and performs an output reciprocating motion by applying an input reciprocating motion, the position of the output reciprocating motion is changed without changing the position of the input reciprocating motion. In addition, the support mechanism that uses a reciprocating mechanism to hold the workpiece can be used in common even when the width of the workpiece is different, for example. When used as a handling device for laterally holding lead frames used for assembling semiconductor devices, the device can be used commonly for lead frames of different widths.

[Brief explanation of drawings]

Figure 1 is a schematic configuration diagram of the first embodiment, Figure 2 is a schematic diagram of the support mechanism that is an example of the use of the first embodiment, Figure 3 is a schematic diagram of the second embodiment, and Figure 4 is the conventional FIG. 5 is a schematic diagram of a support mechanism used in a conventional example. In the figure, 1, LA, IB are the first members, 2.2A, 2B are the second members, 1a, 2a are rolling surfaces, 3 is a link, 3a, 3b are ends, 4 is a human power point, 4a is a roller, 5 is the third member, 6 is the feed screw, 7 is the tension spring, 8 is the cam, 9A, 9B are the claws, 10 is the lead frame (work), L+ is the first straight line, L2 is the second straight line, L3 is the third straight line Straight line, X8. , is the input reciprocating motion, and X out is the output reciprocating motion. 1: first member 2-second member 1△, IB: first member la, λa: this-3 is 9 surface 2A, 2B: second member 3: link 1: first member 1a rolling surface 3α, 3b゛f # 3 part 6: Feed screw 8 D - 9 ``Ko 1 Ward 刹亘L: Straight line Xjn Niji\Kai master revenge! b 1 Kaoru J^ Toshi 7
1st 4th concave 2: 11th member 3-link 4; Before input 7:51 Zhang Bazi/, -Ji E1G1 famous phrase

Claims (1)

[Claims] 1) a first member that is movable on a first straight line and performs output reciprocating motion; a second member that is freely fixed at any position on a second straight line parallel to the first straight line; a link whose end part engages with the first member and whose other end part engages with the second member so that an input reciprocating motion is applied to an input point provided in the middle; the first member of the link; The engagement of the link is a rolling pair in which the rolling surface is a surface provided on the first member perpendicular to the first straight line, and the engagement of the link with the second member is a rolling pair where the surface provided on the first member is perpendicular to the second straight line. The link is a rolling pair whose rolling surface is a surface provided with the input point.
A reciprocating mechanism characterized by being supported by a third member that is movable on a third straight line parallel to the straight line. 2) A first member that is movable on a first straight line and performs output reciprocating motion, a second member that is freely fixed at any position on a second straight line parallel to the first straight line, and one end of which is the first member. and a link whose other end engages with the second member to apply an input reciprocating motion to an input point provided in the middle, and the engagement of the link with the first member is caused by the first member. The link is a rolling pair whose rolling surface is a surface provided perpendicularly to the first straight line on one member, and the engagement of the link with the second member is a rotating pair that pivotally supports the link. , a reciprocating mechanism characterized in that it is supported by a second member by the rotating pair. 3) The second member is screwed into a feed screw arranged parallel to the second straight line, and the fixing position is determined by operating the feed screw. Reciprocating mechanism. 4) a cam in which two reciprocating mechanisms according to claim 1 face each other with the first and second straight lines in common, and is disposed between them to symmetrically apply input reciprocating motion to the two input points; A support mechanism characterized by having claws provided on each of the two first members to clamp the workpiece as the mutual interval narrows as the output reciprocates.