JP2009160604A - Holder for conveying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a holder for a work conveying device, which has a high degree of freedom in installation of an attachment and can be reduced in weight, and to which the attachment can be selectively and detachably connected. <P>SOLUTION: In the holder for a work conveying device, which is installed to the work conveying device of a press machine and allows the attachment 2 having a vacuum suction cup 53 to be detachably connected thereto, the holder for the work conveying device includes a holder body 1 and an engaging mechanism 3. The holder body 1 is substantially cubic, and has two circular through-holes H orthogonal to each other in the axial center. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a work transport device holder that is attached to a work transport device of a press machine and that can detachably connect an attachment having a vacuum suction cup.

2. Description of the Related Art Conventionally, when a work is carried in / out of a press processing line, a transport device having an attachment having a vacuum suction cup has been used.
However, when the shape or the like of the workpiece to be transferred is different, it is necessary to appropriately replace it with an optimal attachment accordingly.
Therefore, the attachment is normally detachably connected to the transfer device via the workpiece transfer device holder.

Therefore, in order to facilitate the replacement of the attachment, a so-called one-touch holder that can replace the attachment with one touch has been proposed (see Patent Document 1).
This one-touch holder is fixed to the transport device, and has a structure in which a holding arm having a suction device is connected via a one-touch boss.

The holder body of the one-touch holder is provided with a through-hole for inserting the boss part of the one-touch boss, and further presses the stop lever that prevents the one-touch boss from coming off and the upper part of the outer peripheral surface of the boss part. There is also a pivotable locking plate to fix.
JP-A-2005-59051

By the way, recently, in press working of automobiles and the like, the shapes of metal plate materials (that is, workpieces) to be processed have been diversified, and it is necessary to accurately cope with them.
Further, it is necessary to reduce the weight of the moving part of the arm of the work transfer device as much as possible in order to increase the transfer speed.
In particular, in order to attach a plurality of one-touch holders, the load per one should be as light as possible.

However, with the one-touch holder disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2005-59051), the attachment can be connected to the one-touch holder only in the axial direction of one through hole.
Therefore, there exists a problem that the shape and direction of the workpiece | work which can be conveyed are restrict | limited. Moreover, weight reduction is not necessarily achieved sufficiently.

The present invention aims to solve such problems.
That is, an object of the present invention is to provide a holder for a work transfer device that has a high degree of freedom in attachment attachment, that can be selectively detachably connected, and can be reduced in weight.

  As a result of earnest research under such a background, the present inventor unexpectedly leads to weight reduction if there is a space in which a through hole can be further provided in a direction perpendicular to the existing through hole. The present invention was completed based on this finding.

  That is, the present invention provides: (1) a holder for a work transfer device that is attached to a work transfer device of a press machine and detachably connects an attachment having a vacuum suction cup; The holder main body has a substantially cubic shape, and is provided in a holder for a workpiece transfer apparatus in which two circular through holes whose axis centers are orthogonal to each other are formed.

  The present invention also resides in (2) the holder for the workpiece transfer apparatus according to the above (1), wherein a detent portion for preventing rotation of the attachment is provided on the inlet side of each through hole.

  Moreover, this invention exists in the holder for workpiece conveyance apparatuses of the said (2) description which consists of a recessed part for (3) and a rotation stop part to insert a part of attachment.

  Moreover, this invention is for the workpiece conveyance apparatus of the said (3) description that the said recessed part is formed of the lower extension part extended from a lower end part, and the upper extension part extended from an upper end part. Lies in the holder.

  Further, the present invention is the above (5), wherein both end corners of the lower extension part are attached to the work transfer device by bolts, and the upper part located just above both end corners of the lower extension part. The workpiece conveying apparatus holder according to the above (4), in which both end corners of the extending portion are cut into a rectangle.

  Moreover, this invention exists in the holder for workpiece conveyance apparatuses of the said (1) description by which the through-hole S connected to each through-hole in the up-down direction is formed in the holder main body (6).

  Moreover, this invention exists in the holder for workpiece conveyance apparatuses of said (1) description with which the engaging mechanism for preventing the attachment from detaching is provided in the exit side of each through-hole (7).

  According to the present invention, (8) the engagement mechanism includes an engagement lever that elastically engages a groove formed in the attachment, a compression spring that applies an elastic force to the engagement lever, and an engagement release pin that moves the engagement lever. It exists in the holder for workpiece conveyance apparatuses of the said (1) description provided with.

  According to the present invention, in the holder for the workpiece transfer device according to (8), a recognition protrusion is formed on the engagement lever, and the engagement state can be confirmed by projecting or hiding the recognition protrusion from the holder body. Exist.

  Moreover, this invention exists in the holder for workpiece conveyance apparatuses of said (1) description to which the cover part for covering (10) and a latching mechanism is attached.

  According to the first aspect of the present invention, in the work transport device holder that is attached to the work transport device of the press machine and detachably connects the attachment having the vacuum suction cup, the work transport device holder includes: a holder main body; The holder main body has a substantially cubic shape, and has two vacuum through-holes whose axes are orthogonal to each other, thereby having the vacuum suction cup corresponding to the shape and orientation of the workpiece. An attachment can be selected and inserted into one of the two through-holes having a circular cross section perpendicular to the axis, and can be detachably connected to the holder for the workpiece transfer device.

Therefore, the shape and direction of the work that can be transported are not limited.
In addition, the holder body is reduced in weight by having two through holes.
The attachment is configured simply by inserting the attachment into the through-hole of the holder for the workpiece transfer device by providing a rotation-preventing portion for preventing the rotation of the body of the attachment on the inlet side of each through-hole. A cylindrical body portion that engages with the engaging lever, and positioning of the attachment and the holder for the work transfer device is performed by the anti-rotation portion.

By forming through holes in the holder body in communication with the through holes in the vertical direction, the inside can be easily cleaned from above through the through holes.
Further, since the through hole is formed to reduce the weight and the inertia, the work transfer device can be efficiently moved.
A recognition protrusion is formed on the engagement lever, and the engagement state is confirmed when the recognition protrusion protrudes or hides from the holder body.

A holder for a workpiece transfer device (hereinafter simply referred to as a holder) of the present invention is attached to a workpiece transfer device of a press machine, and an attachment 2 having a vacuum suction cup is detachable.
That is, a work transport device holder that is attached to a work transport device of a press machine and removably connects an attachment 2 having a vacuum suction cup,
The holder for the workpiece transfer apparatus includes a holder main body 1 and a hooking mechanism 3, and the holder main body 1 has a substantially cubic shape and is formed with two through holes H having a circular cross section whose axes are orthogonal to each other. It is.

The details will be described below.
A holder for a workpiece transfer apparatus according to the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing a holder according to an embodiment of the present invention.
FIG. 2 is a plan view showing the holder according to the embodiment of the present invention.
FIG. 3 is a side view showing the holder according to the embodiment of the present invention.
4 is an AA cross-sectional view of the holder shown in FIG. 2, in which (A) shows an engaged state and (B) shows an unengaged state.
FIG. 5 is a front view of a lid attached to the holder body.
6A and 6B are plan views of an attachment connected to the holder, where FIG. 6A is a side view and FIG. 6B is a plan view.
FIG. 7 is a side view showing a state in which the attachment is connected to the holder.
FIG. 8 is a schematic plan view showing the positional relationship between the attachment connected to the holder and the workpiece.

As shown in FIG. 1, the holder body 1 is attached and fixed to a work transfer device, and is a block body having a substantially cubic shape as a whole, and two central axes orthogonal to each other in the same plane at the center. Through holes H, H having a circular cross section are formed.
In addition, although the holder main body 1 consists of metal materials, an aluminum alloy is preferable from a light viewpoint.
These through holes H and H are sized so that a cylindrical body portion 22 of the attachment 2 to be described later can be mounted.
A through hole S communicating with the through holes H, H is formed from the upper surface to the lower surface of the holder body 1.

By forming the through hole S, the load on the holder main body 1 can be further reduced, and as a result, the inertia is reduced. Therefore, there is an advantage that the movement of the workpiece transfer device can be performed quickly and efficiently.
It is easy to clean.
On the inlet side (one end side of the opening) of each through hole H is provided with a detent portion for preventing the rotation of the cylindrical body portion 22 of the attachment 2.
This anti-rotation portion comprises a recess 1c into which a part of the attachment 2 is fitted.
And this recessed part 1c is formed of the lower extension part 1a extended from the lower end part of the holder main body 1, and the upper extension part 1b extended from the upper end part.

Holder attachment holes P1 are provided at both end corners of the lower extension portion 1a, and are attached to the work conveying device through the holes using bolts.
And the part located right above the both-ends corner part of this lower extension part 1a, ie, the both-ends corner part of this upper extension part 1b, is notched into the rectangle.
Therefore, the bolt can be easily inserted without being obstructed from directly above the holder mounting hole P1, and can be tightened with a tool or the like, which is extremely convenient.

On the other hand, the engagement mechanism 3 for preventing the attachment 2 from coming off is provided on the outlet side (the other end side of the opening) of each through hole H.
Since the same hooking mechanism 3 is provided on two adjacent surfaces of the holder body 1, the single-side hooking mechanism 3 will be described for convenience.

  As shown in FIG. 4, the engagement mechanism 3 includes an engagement lever 32 that elastically engages with an annular groove 22 b formed in the attachment 2, a compression spring 33 that applies elastic force to the engagement lever 32, and an engagement lever 32. The latch release pin 31 which moves is provided.

More specifically, the engagement mechanism 3 includes an engagement lever 32 that is elastically engaged with an annular groove 22b formed in the attachment 2, and a compression spring 33 (positioned by a screw 33a) that applies an elastic force to the engagement lever 32. ), And a latch release pin 31 that pushes and moves a part of the latch lever 32, and these are incorporated in the recess 1d of the holder body 1.
The compression spring 33 is positioned by a pin 33a.
Further, a lid 4 for covering (closing) the engagement mechanism 3 is attached using a bolt or the like, and a pair of screw holes P2 for that purpose is formed on the side surface of the holder body 1 (FIG. 4, (See FIG. 5).

The engaging lever 32 constituting the engaging mechanism 3 is a plate member having a constant width as a whole, and a rotation shaft pin 32b is inserted into a hole P formed in the lower part and a shaft hole P3 formed in the holder body. It can be pivotally attached.
The engaging portion of the engaging lever 32 with respect to the attachment 2 is formed in an arc shape or a dogleg shape.

  As described above, the engaging lever 32 is supported by the holder body 1 so as to be rotatable about the shaft pin 32b, but the holder is held by the above-described compression spring 33 so as to elastically contact the attachment 2. The main body 1 is biased in the direction toward the axial center of the through hole H.

Note that the engaging lever 32 hits a part of the holder main body 1 in the direction in which it is pressed against the attachment 2 and only performs a certain rotation.
Further, the engaging lever 32 rotates and accurately engages with an annular groove 22b formed in a cylindrical body portion 22 of the attachment 2, which will be described later, but a recognition protrusion 32a extending greatly outward on the opposite side of the engaging portion. Is formed.
The recognition protrusion 32a can protrude from the opening 1e of the holder body 1 to the outside.

On the other hand, the latch release pin 31 that constitutes the latch mechanism 3 is pushed against the latch lever 32 to be moved, and is disposed on the opposite side of the compression spring 33 across the latch lever 32 and slides on the holder body 1. Supported as possible.
The engagement release pin 31 releases engagement between the annular groove 22b formed in the cylindrical body portion 22 of the attachment 2 described later and the engagement lever 32.
The inner end of the latch release pin 31 is disposed so as to be able to contact the end of the latch lever 32.
The outer end of the latch release pin 31 protrudes outside the holder body 1 when the annular groove 22b and the latch lever 32 are engaged.

Now, when the head portion protruding to the outside of the latch release pin 31 is pushed inward, the inner end of the latch release pin 31 contacts and pushes the latch lever 32, and the latch lever 32 rotates the shaft pin 32b at the center of rotation. As a predetermined direction (counterclockwise).
Thereby, the engagement between the annular groove 22b of the cylindrical body portion 22 of the attachment 2 and the arc portion 4a of the engagement lever 32 is released.

  After the engagement mechanism 3 (that is, the engagement lever 32, the engagement release pin 31 and the compression spring 33) is assembled in the recess 1c of the holder body 1, the plate-like lid 4 is attached to the holder body 1 so as to cover them. It is attached via a set screw or the like.

The lid 4 is formed with a through hole 4H having the same diameter as the axis of the through hole H of the holder body 1, and a pair of holes P through which the mounting bolts are passed and a single hole P through which the shaft pin 32b is passed. Is formed.
The lid 4 is attached to the holder body 1 using attachment bolts or the like.

  And the holder 1 is fixed to a conveying apparatus (specifically arm base) using a mounting bolt etc. (refer FIG. 1, FIG. 8).

  Next, a specific example of the attachment 2 detachably connected to the holder 1 will be described with reference to FIG.

  The attachment 2 includes a substantially cylindrical manifold 21 and a cylindrical body 22 extending from the manifold 21. The cylindrical body 22 has a smaller diameter than the manifold 21.

An oblique chamfer 22 a and an annular groove 22 b are formed on the tip side of the cylindrical body 22, and a flat part 21 a is formed on the cylindrical body side of the manifold 21 in the vertical direction.
The upper and lower flattening portions 21a are fitted into the concave portions 1c formed between the lower extending portion 1a and the upper extending portion 1b of the holder main body 1, and the rotation of the attachment 2 is prevented.
A negative pressure passage V is formed inside the attachment 2 (manifold 21 and cylindrical body 22).

  The attachment 2 is attached with an end piece 52 including a communication pipe (not shown) that communicates with an air source that is a vacuum generation unit and a vacuum suction cup 53.

Next, the connection of the attachment 2 to the holder 1 will be described.
First, one through-hole H is selected from among the two through-holes H and H whose cross sections formed on the holder 1 are orthogonal to each other.
The cylindrical body 22 of the attachment 2 is inserted into the selected through hole H.
When the cylindrical body 22 is inserted, a chamfer 22a is formed on the tip end side thereof, so that the engaging lever 32 is pushed and receives a component force and rotates so as to open against the urging force of the compression spring 33.
And the cylindrical trunk | drum 22 protrudes ahead (state of FIG. 7).
Then, the engaging lever 32 is dropped and engaged with the annular groove 22 b of the cylindrical body portion 22 by the urging force of the compression spring 33.

In this case, the recognition protrusion 32a formed on the engaging lever 32 enters the holder main body 1 and is hidden, so that it cannot be visually recognized.
Thus, it can be sensed that the engaging lever 32 is engaged with the annular groove 22b of the cylindrical body 22.

  Incidentally, even if the cylindrical body 22 of the attachment 2 can be seen in this way, it is not always possible to recognize whether or not it is engaged. However, since the recognition protrusion 32a is hidden, the annular groove 22b and the engagement lever 32 can be securely connected. You can see that they are involved.

  Here, when the cylindrical body 22 is inserted into the through hole H, the flattened portion 21a of the manifold 21 of the attachment 2 is inserted so as to be aligned with the anti-rotation portion of the holder body 1, that is, the recess 1c. At the same time as being positioned with respect to 1, it is stopped.

On the other hand, in order to replace the attachment 2, in order to extract the attachment 2 connected to the holder 1, the head portion of the latch release pin 31 protruding outside the holder body 1 is pushed inward.
By pushing the latch release pin 31 inward, the latch release pin 31 rotates in a direction to open the latch lever 32 against the urging force of the compression spring 33.

Then, the engagement lever 32 comes out of the annular groove 22b of the cylindrical body portion 22 and the engagement is released.
Thereafter, the attachment 2 can be extracted from the holder 1.
After the attachment 2 is removed from the holder 1, the engagement lever 32 rotates in the closing direction by the urging force of the compression spring 33 and returns to the original position.
Note that the latch release pin 31 also moves in the original direction by the urging force of the compression spring 33 and returns to the original position protruding outward.

  As mentioned above, since the holder for workpiece conveyance apparatuses of this invention has the above structures, when attaching the attachment 2, not only a freedom degree arises in an attachment direction, but it is lightweight and very useful.

A usage form of the holder 1 (a state in which the holder is attached to the arm base 5 of the workpiece transfer device) will be described with reference to FIG. 8 (the connecting pipe is omitted).
FIG. 8A shows a case where attachments are connected using one of the two through holes H of the four holders.
FIG. 8B shows a case where attachments are connected using through holes in directions different from those of the four holders in FIG. 8A.
FIG. 8C shows a case where two of the four holders use one through hole and the other two connect the attachment 2 using the other through hole.
And as shown to FIG. 8 (A), (B), (C), it can fully respond also when the shape and direction of the workpiece | work W differ.

According to the holder 1 configured as described above, there is a degree of freedom in the mounting direction.
That is, the attachment 2 having the vacuum suction cup 53 corresponding to the shape and orientation of the workpiece W is inserted into the through-hole H by selecting one of the two through-holes H having a circular cross section whose axis is orthogonal. The holder 1 can be detachably connected.
Accordingly, it is possible to cope with various shapes of the work W that can be conveyed.

Further, by simply inserting the attachment 2 having the vacuum suction cup 53 into the through-hole H of the holder 1, the cylindrical body 22 constituting the attachment 2 is engaged with the engagement lever 32 and the attachment 2 and the holder 1 are connected by the detent portion 1c. Positioning is performed.
Further, the engagement of the engagement lever 32 can be released simply by pushing the engagement release pin 31 inward.

In this way, the attachment 2 having the vacuum suction cup 53 can be connected to or removed from the holder 1 simply by inserting the attachment 2 and pushing the engagement release pin 31.
Further, it can be easily confirmed by visually confirming whether the recognition protrusion 32a is hidden or not.
Further, since two through holes H are formed in the holder body 1, the weight is inevitably reduced.

Although the present invention has been described above, the present invention is not limited to the above-described embodiment, and can be modified as long as the object is met.
When the attachment 2 may rattle in the holder body 1, the cylindrical body 22 can be fixed to the holder body 1 with a rope or the like using the through hole S.
By doing so, not only the looseness is eliminated, but also the vibration is absorbed and stabilized by the rope.

FIG. 1 is a perspective view showing a holder according to an embodiment of the present invention. FIG. 2 is a plan view showing the holder according to the embodiment of the present invention. FIG. 3 is a side view showing the holder according to the embodiment of the present invention. 4 is an AA cross-sectional view of the holder shown in FIG. 2, in which (A) shows an engaged state and (B) shows an unengaged state. FIG. 5 is a front view of a lid member attached to the holder body. 6A and 6B are plan views of an attachment connected to the holder, where FIG. 6A is a side view and FIG. 6B is a plan view. FIG. 7 is a side view showing a state in which the attachment is connected to the holder. FIG. 8 is a schematic plan view showing the positional relationship between the attachment connected to the holder and the workpiece.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Holder main body 1a ... Lower extension part 1b ... Upper extension part 1c ... Recessed part (rotation prevention part)
DESCRIPTION OF SYMBOLS 1d ... Recess 1e ... Opening 2 ... Attachment 21 ... Manifold 21a ... Chamfer 22 ... Cylindrical trunk 22a ... Chamfer 22b ... Ring groove 3 ... Engagement mechanism 31 ... Engagement release pin 32 ... Engagement lever
32a ... recognition protrusion 32b ... shaft pin 33 ... compression spring 4 ... lid 4H ... through hole 5 ... arm base 52 ... end piece 53 ... vacuum suction cup S ... through hole P ... hole P1 ... holder mounting hole P3 ... shaft hole P2 ... Screw hole H ... Through hole V ... Negative pressure passage W ... Workpiece

Claims (10)

In a work transport device holder that is attached to a work transport device of a press machine and detachably connects an attachment having a vacuum suction cup,
The workpiece transfer device holder includes a holder body and a hooking mechanism,
The holder for a workpiece transfer apparatus, wherein the holder main body has a substantially cubic shape, and two circular through holes whose axis centers are orthogonal to each other are formed.   2. The holder for a workpiece transfer apparatus according to claim 1, wherein a rotation stopper for preventing rotation of the attachment is provided on the inlet side of each through hole.   The holder for a workpiece transfer apparatus according to claim 2, wherein the non-rotating portion comprises a recess for fitting a part of the attachment.   4. The work conveying apparatus holder according to claim 3, wherein the concave portion is formed by a lower extending portion extending from a lower end portion and an upper extending portion extending from an upper end portion.   Both end corners of the lower extension part are attached to the work transfer device by bolts, and both end corners of the upper extension part located right above the both end corner parts of the lower extension part are rectangular. The holder for a workpiece transfer apparatus according to claim 4, wherein the holder is cut into a notch.   The holder for a workpiece transfer apparatus according to claim 1, wherein a through hole S is formed in the holder body so as to communicate with each through hole in the vertical direction.   2. The holder for a workpiece transfer apparatus according to claim 1, wherein a hooking mechanism for preventing the attachment from being detached is provided on the outlet side of each through hole.   The engagement mechanism includes an engagement lever that elastically engages with a groove formed in the attachment, a compression spring that applies elastic force to the engagement lever, and an engagement release pin that moves the engagement lever. The holder for a workpiece transfer apparatus according to 1.   9. The holder for a workpiece transfer apparatus according to claim 8, wherein a recognition protrusion is formed on the engagement lever, and the engagement state can be confirmed by protruding or hiding the recognition protrusion from the holder body.   The holder for a workpiece transfer apparatus according to claim 1, further comprising a cover portion for covering the engaging mechanism.

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