JP2003246448A - Work spacing changing mechanism for conveying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems of failing to make fine adjustment of a space between holders besides requiring unnecessary time to change set-up due to being unable to make diverse change of a space between two holders in a conveying device for performing circulating conveyance of workpieces by two pieces each. <P>SOLUTION: The peripheral edge part of an indexing table 15 is provided with reference holders 17 on the same face orthogonal to a rotating shaft in each indexing angle position, and movable holders 43 are provided in an integrally rotatable manner being movable toward the rotation axis with respect to the reference holders 17. In a position where a cam follower 44 abuts on a cam top face 45a of a cylindrical cam 45, the space of the movable holder 43 to the reference holder 17 is positioned to a pitch = P1. In a position where the cam follower 44 abuts on the local cam face of a local cam 58, the space of the movable holder 43 to the reference holder 17 is positioned to a pitch = P2. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work space conversion mechanism for a transfer device that transfers two works at a time, and more specifically, a mechanism for converting a space between two works at a receiving position during rotation. It is about.

[0002]

2. Description of the Related Art As a conventional technique according to the present invention, for example, the invention disclosed in Japanese Patent Publication No. 8-9370 relating to an electronic component carrying device is known. The invention disclosed in this prior art publication has been made for the purpose of improving the transfer efficiency by transferring two electronic components at a time, and the intervals are provided at respective positions corresponding to the rotation pitch of the index table peripheral portion. Corresponding to two clamps that can be changed,
A slider, which is formed with a tapered portion (inclined surface) that can slidably contact two clamps and can be moved forward and backward, and a fixed cam that moves the slider forward and backward are provided.

With this structure, on the receiving side of the electronic component, two electronic components are clamped at the same time by setting the spacing between the clamping members by the fixed cam and the slider so as to match the supply pitch of the electronic component supply device. The index table is then conveyed at each rotation pitch. Then, on the delivery side of the electronic components, the slider is advanced and retracted by the fixed cam to adjust the interval between the holding tools to the pitch of the processing device, and the two electronic components are delivered simultaneously.

[0004]

However, in the invention of the prior art described in the above publication, the amount of forward and backward movement of the slider is constant due to the small diameter portion and the large diameter portion of the fixed cam, and the tapered portion of the slider is used. (Slope) is constant. Therefore, in order to cope with a change in the size of the work, even if the supply pitch of the supply device on the receiving side or the pitch of the processing device on the sending side is changed, the gap between the clamps must be changed unless the fixed cam or slider is replaced. Since the adjustment is not possible, there is a problem that unnecessary setup change time is required and the interval between the holding tools cannot be finely adjusted.

The present invention has been made in view of the above problems, and the object of the present invention is Japanese Patent Publication No.
In JP-9370, even if the pitch of the supply device or the processing device is changed, the interval between the holders cannot be adjusted, which requires an unnecessary setup change time, and the interval between the holders cannot be finely adjusted. It is intended to solve the problem.

[0006]

In order to solve the above-mentioned problems, the invention according to claim 1 of the present invention is to set the intervals between the works at a plurality of transfer positions of a transfer device for transferring two works by two. It is a conversion mechanism, and it is attached to the index table that can be rotated intermittently at the set indexing angle and the peripheral edge of each indexing angle position of this index table on the same plane orthogonal to the rotation axis of the index table. A reference holder that holds one of the workpieces and a reference holder that are arranged side by side in the direction of the axis of rotation so as to be individually changeable in space and integrally rotatable with the reference holder to hold the other workpiece. Movable holder, a cylindrical cam whose cam surface undulating in the direction of the rotation axis is formed on a cylindrical end surface centered on the rotation axis, and which cannot rotate with respect to the rotation axis, and the cylinder. A cam follower integrally provided with the movable holder so that the cam surface of the cam can roll, and a pressing spring for urging the cam follower to constantly contact the cam surface of the cylindrical cam. .

According to the first aspect of the present invention, the reference holder is attached to the peripheral portion of each indexing angular position of the index table and holds one work on the same plane orthogonal to the rotation axis of the index table. And a cylindrical cam that rotates integrally with the reference holder and is juxtaposed in the direction of the rotation axis with respect to the reference holder at each indexing angular position, and can be individually changed during indexing by a non-rotatable cylindrical cam. Since the movable holder for holding the other workpiece is provided, the distance between the workpieces at the plurality of transfer positions is based on the reference holder that rotates in a certain plane, such as a supply device, a processing device, and a transfer device. It is possible to easily and accurately set the position of the movable holding tool at the same interval as the mutual work interval.

According to a second aspect of the present invention, the index table is rotatably provided in a vertical plane, and the work holding axes of the reference holder and the movable holder are arranged radially. This is the work space conversion mechanism of the device.

According to the second aspect of the present invention, it is possible to easily change the posture of the work received in the horizontal posture to the vertical posture or the posture of the work received in the vertical posture to the horizontal posture.

According to a third aspect of the present invention, the cylindrical cam is provided so as to be movable in the direction of the rotational axis, and a cylindrical cam drive means and a positioning means for moving and positioning the cylindrical cam are provided. It is a work distance conversion mechanism of a transfer device capable of simultaneously adjusting the smaller distance and the larger distance of the movable holder with respect to the reference holder by the same amount.

According to the invention of claim 3, a supply device,
When changing the pitch of the processing device, the transfer device, etc., the gap between the movable holder and the reference holder can be easily adjusted by moving the cylindrical cam, so that the setup change time can be shortened. Further, since the distance between the movable holder and the reference holder can be finely adjusted, it is possible to deal with various works.

In the cam surface of the cylindrical cam of the invention according to the fourth aspect, the cam follower can roll continuously with the cam surface of the cylindrical cam on at least a part of at least one of the top and the bottom of the cam. A cam surface is formed, the cylindrical cam and a local cam relatively movable in the direction of the rotation axis are provided in an overlapping manner, and a local cam drive means and a positioning means for driving the local cam are provided. It is a work space conversion mechanism of a transfer device capable of adjusting a space between the movable holder and the reference holder facing the local cam.

According to the fourth aspect of the present invention, there is provided a local cam which is formed with a cam surface on which the cam follower can roll continuously with the cam surface of the cylindrical cam and which is movable relative to the cylindrical cam in the rotational axis direction. Since it is provided, it is possible to independently adjust only the distance between the reference holder and the movable holder facing the local cam with respect to the distance between the reference holder and the movable holder at other indexing angular positions. it can. Therefore, it is possible to convey the workpieces in various forms with different intervals.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a work space converting mechanism of a carrying device of the present invention will be described below with reference to FIGS. 1 is a plan view showing the conveying device, FIG. 2 is a side view in which a part of the space conversion mechanism is longitudinally sectioned, FIG. 3 is a sectional view taken along the line AA of FIG. 2, and FIG. 4 is a line BB of FIG. FIG. 5 is a plan view of a setting example for adjusting the pitch between the reference holding tool and the movable holding tool, and FIG. 6 is a combination table of setting examples for adjusting the pitch between the reference holding tool and the movable holding tool.

As shown in FIG. 1, the carrying apparatus of this embodiment has a table holding device 1 as a main part and an indexing device 2 for intermittently rotating an index table 15 of the table holding device 1 at a set indexing angle. And a work supply device 3 for supplying a work to the table holding device 1 shown in FIG.
It is installed on 1. First, the indexing device 2 is operated by an indexing mechanism (not shown) in the casing 21,
The output shaft 24 is intermittently rotated by ¼ rotation (90 degrees) with respect to one rotation (360 degrees) of the input shaft 23 driven by the electric motor (not shown) via the driven pulley 22.

Next, the table holding device 1 includes the substrate 11
A support plate 12 is erected upright, and a bearing cylinder 13 is attached through the upper part of the support plate 12 at the same axial center position as the output shaft 24 of the indexing device 2. A rotary shaft 14 is rotatably supported by the bearing cylinder 13, and one end of the rotary shaft 14 is supported by a joint 25 to provide an output shaft 24.
The index table 15 is integrally rotatably attached to the other end via a key 16 at the other end.

At the outer edge of the index table 15, a bank-like protrusion 15a is formed on the rear surface side (right side of FIG. 2), and the outer peripheral surface of the index table 15 is 9
As shown in FIG. 3, planes 15b, 15b, which are orthogonal to the normal line of the outer periphery, are arranged at the indexing angle positions (quarter position) every 0 degree.
15b and 15b are formed at equal distances from the center of the rotation axis. In addition, each of the planes 15b is on the same plane orthogonal to the axis of the rotation shaft 14 of the index table 15 and passes through the axis of the index table 15.
On the normal line of 5b, the reference holder holes 15c, 15c, 15
c and 15c are drilled. Then, a cylindrical bottomed reference holder 17, 17, 17, 17 in which the cylindrical work W can be inserted into each of the reference holder holes 15c and the center of the workpiece W is the work holding axis is an index table. 1
Each is attached so that it will not come off due to the centrifugal force caused by the rotation of 5.

Further, the shaft holes 15d and the spring holes 15e are equidistantly provided on both sides of the reference holder holes 15c, 15c, 15c, 15c shown in FIG.
Are drilled on the same axis parallel to the rotation axis of the paired index table 15. Each shaft hole 1
A pair of bearing cylinders 18 are erected on the front side of the index table 15 (on the left side of the drawing sheet of FIG. 1) on the same axis as 5d by drilling shaft holes (not shown). And
A guide shaft 19 is inserted into the shaft holes of the respective bearing cylinders 18 so as to pass through the shaft holes 15d of the index table 15 and the spring holes 15e, and the pair of guide shafts 19 and 19 are shown in FIG. The left end sides are connected by a connecting plate 20.

On the right end side of each pair of guide shafts 19 and 19 shown in FIG. 1, a compression spring 41 inserted in a spring hole 15e.
When the holder 42 is urged by the guide shafts 19, 19,
Are screwed so as to connect with each other. Each holder 42 has a movable holder hole 4 parallel to the reference holder hole 15c.
2a are arranged side by side in the direction of the rotation axis of the index table 15 and are radially provided. Each movable holder hole 4
A columnar movable holder 43 having a cylindrical shape can be inserted into 2a, and the center of the workpiece W can be used as a workpiece retaining axis.
Are attached so that they will not come off due to the centrifugal force due to the rotation of the index table 15.

A cam follower 44 is attached to each holder 42 rotatably on each radial axis parallel to each movable holder hole 42a. The movable holders 43 facing the reference holders 17 radially arranged at every 90 degrees at the peripheral edge of the index table 15 are rotated by the index table 15 being rotated and positioned at every 90 degrees. It reciprocates along the cam surface of the cylindrical cam 45 in the axial direction of 14. That is, by the action of the cam surface of the cylindrical cam 45, which will be described later, corresponding to each indexing angular position, each movable holding tool 43 is drawn together with the holder 42 via the cam follower 44 with respect to the reference holding tool 17 juxtaposed. Pitch shown in 2 is P1 and P2
Move back and forth between.

Next, the cylindrical cam 45 for reciprocating each movable holder 43 and its related mechanism will be described.
A guide stand 46 of a linear guide mechanism is mounted on the substrate 11 shown in FIG. 2 in parallel with the rotation axis of the index table 15,
A slider 47 is placed so as to sandwich the guide surface of the guide base 46 between the front side and the other side in the figure. The slider 47 is guided by the convex portion 46a of the guide surface of the guide base 46 and is movable back and forth in the axial direction of the rotary shaft 14,
A movable table 48 is attached to the upper surface thereof.

A cylindrical cam 45, which has a U-shaped cross section and has the same axis as the rotary shaft 14, is fixed to the moving base 48, and a cam top surface 45a and a cam valley bottom surface are attached to the left end surface thereof. 45c is formed. This cam top surface 45
2A can maintain the pitch = P1 shown in FIG. 2 when the distance between the movable holder 43 and the reference holder 17 is # 1 position (reception position), # 3 position and # 4 position shown in FIGS. 3 and 4. 1 and the cam slope 45b shown in FIG. 1 before and after the # 2 position (transfer position), and at the position corresponding to the # 2 position, the pitch = P2 shown in FIG.
Is continuous with the cam valley bottom surface 45c which is formed so as to be maintained.

A support plate 49 is erected on the opposite side (left side) of the support plate 12 erected on the base plate 11 shown in FIG. 2, and the operating rod 5 of the pneumatic cylinder 50 attached to the left side surface thereof.
0a is connected to the moving table 48. Therefore, the cylindrical cam 45 can be moved back and forth in the axial direction of the rotary shaft 14 by the operation of the pneumatic cylinder 50. The forward end position of the rotary shaft 1 is attached to the support plate 12.
The movable table 4 is attached to the stopper 51 whose position can be adjusted in the axial direction of 4
8 is positioned by contacting, and the retracted end position is positioned by contacting the movable table 48 with the stopper 52 which is attached to the support plate 49 and whose position can be adjusted in the axial direction of the rotary shaft 14, as shown in FIG. To be done.

Next, a local cam 58 for reciprocating the movable holder 43 positioned at the # 2 position (delivery position),
The related mechanism will be described. The guide shaft 5 shown in FIGS. 1 and 2 is provided on the rear surface side in the vicinity of the cam root 45c of the cylindrical cam 45.
5, 55 stand upright in parallel with the rotary shaft 14 of the index table 15, and a holding plate 56 is fixed to the right end portion thereof. A pneumatic cylinder 57 is attached to the holding plate 56 in parallel with the guide shafts 55, 55. Also, the guide shaft 5
A local cam 58 is inserted through an intermediate portion of the rollers 5, 55 so as to be movable back and forth. This local cam 58 is a cylindrical cam 45.
The outer periphery in the vicinity of the cam valley bottom surface 45c is cut out parallel to the rotary shaft 14, and the cutout outer peripheral surface and the cutout side surfaces 45d, 45 are formed.
d can be slidably contacted with the local cam surface 58 on the front end surface thereof.
a is formed.

Since the operating rod 57a of the pneumatic cylinder 57 is connected to the rear surface side of the local cam 58, the local cam 58 can be moved back and forth in the axial direction of the rotary shaft 14 by the operation of the pneumatic cylinder 57. . The forward end position is attached to the rear surface side (right side in FIG. 2) of the cylindrical cam 45 as shown in FIG. 2 so that the position can be adjusted in the axial direction of the rotary shaft 14 or the stopper 59A can be attached and detached. The local cam 58 body is positioned by abutting the connected stopper 59B, and at the retracted end position, the local cam 58 body abuts on the stopper 61 which is attached to the holding plate 56 and whose position can be adjusted in the axial direction of the rotating shaft 14. Positioned by touching.

Next, the work supply device 3 for supplying the work W to the reference holder 17 and the movable holder 43 of the table holder 1 will be described. The work supply device 3 is shown in FIG.
As shown in FIG. 3, a conveyor 31 capable of transferring the work W in a transfer direction parallel to the axis of the rotary shaft 14 of the table holding device 1.
And two push-out plates 32 that push out two works W on the conveyor 31 and supply them to the reference holder 17 and the movable holder 43 in a horizontal posture.

Subsequently, regarding the procedure and the operation of the work W conveyed by the apparatus of this example, setting examples 1 to 6 shown in FIG.
I will explain based on. In the setting example 1, the mutual distance between the works W received from the conveyor 31 shown in FIG. 1 is pitch = P1.
In this case, this is converted to pitch = P2 and handed over. In this case, the moving base 48 contacts the stopper 52 by the backward movement of the pneumatic cylinder 50 shown in FIG. 2, and the local cam 58 contacts the stopper 59B by the forward movement of the pneumatic cylinder 57. , Position it in advance.

First, when the reference holder 17 and the movable holder 43 are in the position # 1 shown in FIGS. 3 and 4, the cam follower 44 is in contact with the cam top surface 45a of the cylindrical cam 45. The distance between the movable holding member 43 and the movable holding member 43 is positioned at pitch = P1. Therefore, it is possible to receive the works W that are transferred on the conveyor 31 at a mutual interval of pitch = P1.

From this # 1 position, the reference holder 17 and the movable holder 43 together with the index table 15 # 2.
When rotated toward the position, the cam follower 44, which was in contact with the cam top surface 45a of the cylindrical cam 45, moves from the cam top surface 45a shown in FIG.
No. 8 because it rolls on the local cam surface 58a of FIG. 8 (FIG. 5a).
The distance between the movable holder 43 and the reference holder 17 positioned at the position is converted to pitch = P2 and positioned. After reaching the # 3 position from the # 2 position, the # 4 position is returned to the # 1 position, and the interval between them is positioned at pitch = P1 in all setting examples.

Next, setting example 2 is a case where the mutual interval of the works W received from the conveyor 31 is pitch = P1, and this is converted into pitch = P2 + b and delivered. In this case, the movable table 48 is the stopper 5 as in the setting example 1.
2 and the local cam 58 is shown in FIG.
FIG. 5 is a diagram in which b is moved to the right from the setting example 1 in (a).
It is preliminarily positioned so as to come into contact with the stopper 61 shown in (b). First, when the reference holder 17 and the movable holder 43 are at the # 1 position, the distance between the movable holder 43 and the reference holder 17 is the pitch =
Positioned at P1. Therefore, it is possible to receive the works W transferred at the mutual interval pitch = P1.

When the reference holder 17 and the movable holder 43 rotate from the # 1 position toward the # 2 position, the cam follower 44, which is in contact with the cam top surface 45a of the cylindrical cam 45, moves the cam slope 45b. After that, the setting example 1 in FIG.
Since it rolls to the local cam surface 58a of the local cam 58 shown in FIG. 5 (b) which has moved to the right side by b, the distance between the movable holder 43 and the reference holder 17 positioned at the # 2 position is pitch = Converted to P2 + b and positioned.

Next, setting example 3 is a case where the mutual interval of the works W received from the conveyor 31 is pitch = P1, and this is converted into pitch = P2-c and delivered. In this case, the movable table 48 is the stopper 5 as in the setting example 1.
2 and the local cam 58 is shown in FIG.
The stopper 59B of (a) is removed from the stopper 59A and is preliminarily positioned so as to come into contact with the stopper 59A shown in FIG. First, the reference holder 17 and the movable holder 4
3 is at the # 1 position, the distance between the movable holding member 43 and the reference holding member 17 is set to the pitch = P1 as in the setting example 1. Therefore, the mutual spacing is pitch = P
The work W transferred in 1 can be received.

When the reference holder 17 and the movable holder 43 rotate from the # 1 position toward the # 2 position, the cam follower 44, which is in contact with the cam top surface 45a of the cylindrical cam 45, moves the cam slope 45b. After that, the setting example 1 in FIG.
Since it rolls on the local cam surface 58a of the local cam 58 shown in FIG. 5 (c) that has moved to the left side by c more than c, the distance between the movable holder 43 and the reference holder 17 positioned at the # 2 position is pitch = Converted to P2-c and positioned.

Next, setting example 4 is a case where the mutual interval of the works W received from the conveyor 31 is pitch = P1 + a, and this is converted into pitch = P2 + a and delivered.
In this case, the moving table 48 is moved to the right by a in comparison with the setting example 1 shown in FIG.
In addition, the local cam 58 is previously positioned so as to contact the stopper 59B. First, when the reference holder 17 and the movable holder 43 are in the # 1 position, the cam follower 44 comes into contact with the cam top surface 45a of the cylindrical cam 45 that has moved to the right by a in comparison with the setting example 1 shown in FIG. Therefore, the distance between the movable holder 43 and the reference holder 17 is positioned at the pitch = P1 + a. Therefore, it is possible to receive the works W transferred at the mutual interval of pitch = P1 + a.

When the reference holder 17 and the movable holder 43 rotate from the # 1 position toward the # 2 position, the cam follower 44, which is in contact with the cam top surface 45a of the cylindrical cam 45, moves the cam slope 45b. After that, the local cam surface 58a of the local cam 58 moved to the right by a together with the cylindrical cam 45.
Therefore, the distance between the movable holder 43 and the reference holder 17 positioned at the position # 2 is Pitch = P2 + a.
Converted and positioned.

Next, in setting example 5, the mutual interval of the works W received from the conveyor 31 is the same as in setting example 4, pitch = P.
1 + a, which is converted to pitch = P2 + a + b and handed over. In this case, the movable table 48 contacts the stopper 51 at the same position as in the setting example 4, and the local cam 58 contacts the stopper 61 that is moved further rightward than the setting example 4 by b. In advance, position it.

First, when the reference holder 17 and the movable holder 43 are in the # 1 position, the cam follower 44 sets the setting example 4
Since it abuts on the cam top surface 45a of the cylindrical cam 45 at the same position, the distance between the movable holder 43 and the reference holder 17 is positioned at the pitch = P1 + a. Therefore, the work W transferred at the mutual interval of pitch = P1 + a
You can receive

When the reference holder 17 and the movable holder 43 rotate from the # 1 position toward the # 2 position, the cam follower 44, which is in contact with the cam top surface 45a of the cylindrical cam 45, moves the cam slope 45b. After that, the local cam surface 58a of the local cam 58 further moved to the right by b from the setting example 4.
Therefore, the distance between the movable holder 43 and the reference holder 17 positioned at the position # 2 is Pitch = P2 + a.
Converted to + b and positioned.

Next, in the setting example 6, the mutual interval of the works W received from the conveyor 31 is the same as that in the setting example 4, pitch = P.
1 + a, which is converted to pitch = P2 + a-c and handed over. In this case, the movable base 48 is brought into contact with the stopper 51 at the same position as in the setting example 4, and the local cam 58 is further moved to the left side of the setting example 4 by a distance c after removing the stopper 59B. Stopper 5
9A is preliminarily positioned so as to contact with 9A.

First, when the reference holder 17 and the movable holder 43 are at the # 1 position, the cam follower 44 sets the setting example 4
Since it abuts on the cam top surface 45a of the cylindrical cam 45 at the same position, the distance between the movable holder 43 and the reference holder 17 is positioned at the pitch = P1 + a. Therefore, the work W transferred at the mutual interval of pitch = P1 + a
You can receive

When the reference holder 17 and the movable holder 43 rotate from the # 1 position toward the # 2 position, the cam follower 44, which was in contact with the cam top surface 45a of the cylindrical cam 45, moves the cam slope 45b. After that, the local cam surface 58a of the local cam 58 further moved to the left side of the setting example 4 by c.
Therefore, the distance between the movable holder 43 and the reference holder 17 positioned at the position # 2 is Pitch = P2 + a.
Converted to -c and positioned.

Subsequently, another embodiment relating to the work space conversion mechanism of the carrying apparatus of the present invention will be described as follows with reference to FIG. FIG. 7 is a cross-sectional plan view of a part of the distance conversion mechanism showing another embodiment. In the above embodiment, the distance between the workpieces at the receiving position is changed so that the distance becomes larger, and the workpieces are conveyed. However, in another embodiment shown in FIG. Is converted so that the distance becomes smaller, and the distance is conveyed. The same components as those in the above embodiment are designated by the same reference numerals, and the description thereof will be omitted.

In FIG. 7, the mutual distance between the works W received from the conveyor 31 is pitch = P3, and the delivery pitch =
Since it is larger than P4, the local cam 58 and its related mechanism are provided at the position # 1 shown in FIGS. 3 and 4, and the interval of the movable holder 43 with respect to the reference holder 17 is the pitch of delivery = the pitch larger than P4 = It is set to P3. Therefore, the cylindrical cam 4 is different from the embodiment shown in FIGS.
5. The other embodiment shown in FIG. 7 can be constructed only by rotating the local cam 58 and its associated mechanism by 90 degrees. That is, the cylindrical cam 45 is rotated 90 degrees from the position shown in FIGS. 1 and 2 to the position shown in FIG. 7 or from the position shown in FIG. 7 to the position shown in FIGS. With this configuration, setup change can be easily performed.

The work space conversion mechanism of the carrying apparatus according to the present invention is not limited to the above-described embodiment, and can be configured in various forms without departing from the gist of the present invention. . For example, the indexing angle of the index table is not limited to 90 degrees, and the interval conversion between the works is not limited to the receiving position and the delivering position, and the interval conversion can be performed at other indexing angle positions. . Further, the pair of holders consisting of the reference holder and the movable holder is provided at each indexing position of the index table in the above-mentioned embodiment, but it is provided only at one place or at two opposite positions. Alternatively, it may be provided at a plurality of other locations. Further, in the above-described embodiment, the pneumatic cylinder is used as the cylindrical cam driving means for moving the fixed cam forward and backward and the driving means for moving the local cam forward and backward, but a servo motor may be used. In this case, the pitch between the reference holder and the movable holder can be set to an arbitrary size within a certain setting range.

[0045]

Since the present invention is constructed as described above, it has the following effects.

According to the first aspect of the present invention, a reference holder that is attached to the peripheral portion of each indexing angle position of the index table and holds one work on a plane orthogonal to the rotation axis of the index table, A cylindrical cam that rotates integrally with this reference holder and is juxtaposed in the direction of the rotation axis with respect to the reference holder at each indexing angular position, and is provided with the non-rotatable cylindrical cam so that the spacing can be changed individually during indexing Since the movable holder for holding the work is provided, the distance between the workpieces at the plurality of transfer positions is based on the reference holder that rotates in a certain plane, and the distance between the supply device, the processing device, the transfer device, etc. It is possible to easily and accurately set the position of the movable holder at the same interval as.

According to the second aspect of the invention, the index table is rotatably provided in the vertical plane, and the workpiece holding axes of the reference holder and the movable holder are arranged radially. The workpiece received in the horizontal posture can be easily changed to the vertical posture, or the workpiece received in the vertical posture can be easily changed to the horizontal posture.

According to the third aspect of the invention, the cylindrical cam is provided so as to be movable in the direction of the axis of rotation, and the smaller distance and the larger distance of the movable holder with respect to the reference holder are the same amount at the same time. Since the adjustment is possible, when changing the pitch of the supply device, the processing device, the delivery device, etc., the interval between the reference holder and the movable holder can be easily adjusted and the setup change time can be shortened. Further, since the distance between the holders can be finely adjusted, it is possible to handle various kinds of works.

According to the fourth aspect of the present invention, a local cam is formed which has a cam surface on which the cam follower can roll continuously with the cam surface of the cylindrical cam and which is relatively movable in the axial direction of the cylindrical cam. Since it is provided, only the distance between the reference holder and the movable holder facing the local cam is independently adjusted with respect to the distance between the reference holder and the movable holder at other indexing angular positions. You can Therefore, it is possible to convey the workpieces in various forms with different intervals.

[Brief description of drawings]

FIG. 1 is a plan view showing a transfer device according to the present invention.

FIG. 2 is likewise a side view in which a part of the space conversion mechanism is longitudinally sectioned.

FIG. 3 is likewise a sectional view taken along the line AA of FIG.

FIG. 4 is a sectional view taken along the line BB of FIG.

FIG. 5 is also a setting example for adjusting the pitch between the reference holder and the movable holder, and FIG.
2 "and (b) are plan views of" P2 + b "and (c) is" P2-c ".

FIG. 6 is likewise a combination table of setting examples for adjusting the pitch between the reference holder and the movable holder.

FIG. 7 is a plan view in which a part of a space conversion mechanism showing another embodiment is also shown in cross section.

[Explanation of symbols]

1 table holding device 2 indexing device 3 Work supply device 14 rotation axis 15 index table 17 Reference holder 18 Bearing tube 19 Guide shaft 41 compression spring 42 holder 43 Movable holder 44 Cam Follower 45 cylindrical cam 45a cam top surface 50 pneumatic cylinder 51,52 stopper 57 Pneumatic cylinder 59A, 59B, 61 stopper 58 local cams

Claims (4)

[Claims] 1. A mechanism for converting intervals between works at a plurality of transfer positions of a transfer device for transferring two works by two, and an index table capable of intermittent rotation at a set indexing angle, and this index table. A reference holder that is attached to the peripheral edge of each indexing angle position for holding one of the workpieces on the same plane orthogonal to the rotation axis of the index table, and in the direction of the rotation axis with respect to the reference holder. A movable holder, which is arranged side by side so that the distance can be individually changed and is integrally rotatable with the reference holder and holds the other work, and a cam surface which undulates in the direction of the rotation axis is centered on the rotation axis. A cylindrical cam which is formed on the end surface of the cylinder and is not rotatable with respect to the rotation axis, and a cam follower which is provided integrally with the movable holder so that the cam surface of the cylindrical cam can roll. A work space conversion mechanism for a transfer device, comprising: a pressing spring for urging the cam follower so as to always contact the cam surface of the cylindrical cam. 2. The transfer device according to claim 1, wherein the index table is rotatably provided in a vertical plane, and work holding axes of the reference holder and the movable holder are radially arranged. Work space conversion mechanism. 3. The cylindrical cam is provided so as to be movable in the direction of the axis of rotation, and a cylindrical cam drive means and a positioning means for moving and positioning the cylindrical cam are provided, and the movable means is movable with respect to the reference holder. 3. The work space conversion mechanism for a transfer device according to claim 1, wherein the smaller space and the larger space of the holders can be adjusted by the same amount at the same time. 4. The cam surface of the cylindrical cam is such that a cam surface on which the cam follower can roll is formed continuously with the cam surface of the cylindrical cam at a part of at least one of the top and the bottom of the cylinder. A cam and a local cam that is relatively movable in the direction of the rotation axis are provided in an overlapping manner, and a local cam driving means for driving the local cam and a positioning means are provided to face the local cam. The work space conversion mechanism for a transfer device according to any one of claims 1 to 3, wherein the space between the reference holder and the movable holder can be adjusted.