JPH08323592A - Transfer device - Google Patents

Abstract

PURPOSE: To simplify the structure of a machining station with dispensing with the installation of a work locking mechanism separately from a transfer device in the case where a work is positioned at the specified machining position in the machining station, in this transfer device conveying the work among plural units of the machining station. CONSTITUTION: Four conveyor mechanisms 14a to 14d to convey works 13 are individually set up among four machining stations 11a to 11d. Each securing member 46 for positioning and securing the works 3 to machining positions of these machining stations 11a to 11d is installed in these conveyor mechanisms 14a to 14d. In a process of conveying the works 3 by the conveyor mechanisms 14a to 14d, the work 3 is pressed to a jig 48 in the machining stations 11a to 11d from the lower part by the securing member 46, positioning and securing it to the specified machining position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer device for transferring a work between processing stations.

[0002]

2. Description of the Related Art As a conventional transfer device of this type, one having a structure as shown in, for example, JP-A-61-257747 is known.

In this conventional device, in a processing line in which a plurality of processing stations are installed at predetermined intervals,
A transfer bar is extended along the processing station. Then, the transfer bar is reciprocated by the transfer stroke, so that the work is conveyed to each processing station in order, and the work is fixed to the jig at each of the processing stations, and the work is processed. It has become so.

[0004]

However, the conventional transfer device has the following problems because only one transfer bar is extended and arranged along a plurality of processing stations. .

(1) In each processing station, a work fixing mechanism for positioning and fixing the work at the processing position must be provided separately from the transfer device.
Moreover, in order to fix the work by this fixing mechanism, it is necessary to temporarily place the work from the transfer bar at a temporary predetermined position and then fix it by the fixing mechanism, which makes the structure of the processing station complicated.

(2) When the number of processing stations arranged in the longitudinal direction of the transfer bar is increased or decreased or the layout is changed, it is difficult to expand or contract the transfer bar, and the flexibility of the processing line layout is poor.

(3) Generally, when loading and unloading a workpiece to and from a processing station, it is necessary to extend the transfer bar while avoiding the processing area of each processing station, which makes it difficult to change the layout of the processing station. there were. For this reason, it is sometimes necessary to additionally provide a moving mechanism for moving the work from the transfer position by the transfer bar to the processing position of the processing station.

The present invention has been made by paying attention to the problems existing in such conventional techniques. A main object of the invention is to provide a transfer device which can simplify the structure of a processing station without the need to install a work fixing mechanism separately from the transfer device.

Another object of the present invention is to provide a transfer device in which the number of processing stations can be increased or decreased and the layout can be changed easily, and the layout of processing lines can be freely performed.

Another object of the present invention is to provide a transfer device in which the transfer mechanism can be easily arranged according to the layout of each processing station without interfering with the processing area of the processing station.

[0011]

In order to achieve the above object, in the invention of the transfer device according to claim 1, there is provided a transfer mechanism for transferring a work between a plurality of processing stations, and the transfer mechanism is provided in the transfer mechanism. Is provided with fixing means for positioning and fixing the work at the processing position of the processing station.

According to a second aspect of the present invention, in the transfer device according to the first aspect, the transfer mechanism is individually arranged between a plurality of processing stations. According to a third aspect of the present invention, in the transfer device according to the first or second aspect, a positioning pin of a jig for holding a work at a processing position is installed downward at each of the processing stations, and the fixing means is provided. Is for pushing and fixing the work by pushing it up against the jig from below.

According to the invention described in claim 4, claims 1 to 3
In the transfer device according to any one of the items 1 to 3, the fixing means is swingably attached to a transfer mechanism via an elastic member.

[0014]

[Operation] In the transfer device according to the first aspect, the work is sequentially transferred to the plurality of processing stations by the transfer mechanism, and the work is processed at each processing station. At this time, the workpiece is positioned and fixed at a predetermined processing position in the processing station by the fixing means provided in the transfer mechanism as needed. Therefore, there is no need to install a work fixing mechanism separately from the transfer device, and the structure of the processing station can be simplified.

In the transfer device according to the second aspect, the work is carried independently by the carrying mechanism between the processing stations. Therefore, the number of processing stations can be increased or decreased and the layout can be changed easily, and the layout of the processing line can be freely performed. Further, according to the layout of the processing station, the transport mechanism can be easily arranged without interfering with the processing area of the processing station.

In the transfer device according to the third aspect, the work is pushed up by the fixing means, so that the work is pressed from below onto the jig in the processing station and engages with the positioning pin of the jig. Easy and reliable positioning and fixing.

In the transfer device according to the fourth aspect, when the work is positioned and fixed at the processing position, even if an unreasonable force is applied to the work and the fixing means for fixing the work, the force is released. .

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. As shown in FIG. 2, the plurality of processing stations 11a, 11b, 11c, 11d are arranged at appropriate intervals on the processing line. Each of the processing stations 11a to 11d is composed of various processing devices for performing cutting, punching and the like. Intermediate station 1
2a, 12b, 12c are adjacent processing stations 11
Each processing station 11 is arranged in the middle of a to 11d.
Prior to the work 13 processed in a to 11d being carried into the adjacent processing stations 11a to 11d,
The intermediate stations 12a to 12c are temporarily placed.

The plurality of transfer mechanisms 14a to 14d are individually arranged corresponding to the processing stations 11a to 11d. By independently operating these transfer mechanisms 14a to 14d, the work 13 carried in by a loading device (not shown) is transferred from each processing station 11a to 11d to the intermediate station 12a to the rear.
It is continuously carried out to 12c.

Therefore, the transport mechanisms 14a to 14d will be described in detail. As shown in FIGS. 1 and 3, the frame 17 is arranged at each of the processing stations 11a to 11d.
A bracket 18 is attached to one side thereof. The first link 19 is rotatably supported on the bracket 18 via a rotary shaft 20, and a rotary lever 21 is attached to an end of the rotary shaft 20. The second link 22 is the first
The frame 17 is rotatably supported on the other side of the frame 17 via a mounting plate 23 so as to correspond to the link 19 at a predetermined distance.

The elevating bar 24 is rotatably installed between the tip ends of the first link 19 and the second link 22, and a guide groove 25 is formed on the side surface thereof. The transfer bar 26 is disposed on the elevating bar 24, and a pair of rollers 27, which are in contact with the upper surface of the elevating bar 24, are rotatably supported on a side of the transfer bar 26 via a support plate 28. The pair of guide rollers 29 are rotatably supported by each support plate 28, and the transfer rollers 26 are supported on the elevating bar 24 so as to be relatively movable in the longitudinal direction by engaging the guide rollers 29 with the guide grooves 25. ing.

The first moving body 30 is movably supported on the bracket 18 via a guide bar 31, and a fork portion 30a which is engageable with an engaging projection 21a at the tip of the rotating lever 21 is provided on the upper portion thereof. Are formed. The ball screw 32 is rotatably supported by the bracket 18 so as to extend parallel to the guide bar 31, and the first moving body 30 is screwed to the ball screw 32.

The lifting motor 33 is arranged on the bracket 18 and is connected to the ball screw 32. When the ball screw 32 is rotated by the lifting motor 33, the first moving body 30 is moved along the guide bar 31 and the rotating lever 21 is rotated to two positions shown by a solid line and a chain line in FIG. To be done. By this rotation of the rotation lever 21, the elevating bar 24 and the transfer bar 26 are moved up and down via the links 19 and 22 between the upper position shown in FIG. 6 and the lower position shown in FIG.

The second moving body 34 is movably supported on the bracket 18 via a guide bar 35, and an engaging groove 34a extending vertically is formed on the side surface thereof.
The connecting plate 36 is fixed to the end of the transfer bar 26,
An engagement protrusion 36a that slidably engages with the engagement groove 34a is formed at its tip. The ball screw 37 is rotatably supported by the bracket 18 so as to extend parallel to the guide bar 35, and the second moving body 34 is attached to the ball screw 37.
Are screwed together.

The moving motor 38 is disposed on the bracket 18, and has toothed pulleys 39 and 40 and a toothed belt 41.
It is connected to the ball screw 37 via. Then, when the ball screw 37 is rotated by the moving motor 38, the second moving body 34 is moved along the guide bar 35. By the movement of the second moving body 34, the transfer bar 26 is relatively moved on the elevating bar 24 via the connecting plate 36, and the first position P1 shown by a solid line in FIG. 1 and the second position shown by a chain line in FIG. P2 and FIG.
And the third position P3 indicated by the solid line.

In this embodiment, as shown in FIGS. 1 and 2, the intermediate stations 12a to 12c are arranged at the adjacent processing stations 11a to 11d.
The position is set to be half the arrangement interval S1. Further, the moving distance S2 from the first position P1 to the second position P2 of the transfer bar 26 is determined by the processing station 1
Intermediate stations 12 adjacent to 1a to 11d, respectively
a to 12c, that is, the processing station 11a
It is set so as to match a half of the arrangement interval S1 of 11d. In addition, the third transfer bar 26
The position P3 is set to be an intermediate position between the first position P1 and the second position P2, that is, a position that is half the movement distance S2 from the first position P1 to the second position P2.

The first and second supporting members 42 and 43 are provided on the transfer bar 26, and the processing stations 11a.about.
The locators 44 are arranged at intervals (S2) that are half of the arrangement interval S1 of 11d, and a plurality of locates 44 are provided on their upper surfaces in a protruding manner. Then, as shown in FIG. 1, the transfer bar 26 is moved to the first position P1 while the work 13 is held on the pair of holding bodies 45 in the processing stations 11a to 11d and the intermediate stations 12a to 12c in front of the work stations 11a to 11d. When moved, the support members 42 and 43 are arranged below the work 13 so as to face each other. In this state, the transfer bar 26 is lifted from the lower position to the upper position, so that the work 13 after processing at the processing stations 11a to 11d is supported on the first support member 42, and at the same time, the intermediate stations 12a to 12c. The work 13 before processing is supported on the second support member 43.

Thereafter, as shown by the chain line in FIG. 1, the transfer bar 26 is moved from the first position P1 to the second position P2, so that the work 13 after processing on the first support member 42 is moved to the rear intermediate position. It is carried out to the stations 12a to 12c. At the same time, the unworked workpiece 13 on the second support member 43 is carried into the processing stations 11a to 11d. Then, the transfer bar 26 is moved to the second position P2.
When the workpieces 13 are lowered from the upper position to the lower position, the workpieces 13 are transferred onto the holding bodies 45 of the intermediate stations 12a to 12c and the processing stations 11a to 11d.

The fixing member 46 which constitutes the fixing means is arranged on the transfer bar 26 so as to be positioned between the two supporting members 42 and 43, and a plurality of push-up protrusions 47 are formed on the upper surface thereof. . As shown in FIG. 5, the fixing member 46 includes a support rod 46a, and the support rod 46a
Is loosely inserted in the support hole 26a of the transfer bar 26 with a predetermined gap. A disc spring 52 as an elastic member is interposed between the fixed member 46 and the transfer bar 26 around the support rod 46a. That is, the fixing member 46 is swingably attached to the transfer bar 26 via the disc spring 52.

As shown in FIGS. 4 and 6, when the transfer bar 26 is retracted from the second position P2 to the third position P3, the fixing member 46 is moved to the processing station 1 by the fixing member 46.
The workpieces 1a to 11d are arranged to face each other below the work 13. In this state, the transfer bar 26 is lifted from the lower position to the upper position again, so that the push-up protrusion 47 of the fixing member 46 contacts the lower surface of the work 13, and the work 13 moves from below the jig 48 to the jig 48. Pressed against. The jig 48 is installed downward corresponding to the processing position in each of the processing stations 11a to 11d.
Positioning pins 49 are provided on the lower surface. Then, the positioning pin 49 of the jig 48 engages with the locate hole of the work 13 to position and fix the work 13 at a predetermined processing position, and in this state, the work 13 performs predetermined processing on the work 13. .

After the processing is completed, the transfer bar 26 is in the third position.
At the position P3, the work 13 after processing is moved from the upper position to the lower position, so that the processed work 13 is transferred to the processing station 11.
It is delivered onto the holders 45 a to 11 d. Then, the transfer bar 26 is moved to the first position P1.

As shown in FIG. 1, the first sensor 50 is arranged facing the intermediate stations 12a to 12c,
A detection signal is output when the work 13 is loaded into the intermediate stations 12a to 12c.

Next, the operation of the transfer device configured as described above will be described. Now, in this transfer device, as shown in FIG.
4d, the transfer bar 26 is moved up and down integrally with the lifting bar 24 by the lifting motor 33. At the same time, the transfer motor 26 shown in FIG. 3 relatively reciprocates the transfer bar 26 on the elevating bar 24 between the first position P1 and the second position P2.

As a result, the processing stations 11a-1
The processed work 13 located at 1d is supported by the first support member 42 on the transfer bar 26 and is carried out to the rear intermediate stations 12a to 12c. At the same time, the unworked work 13 positioned at the front intermediate stations 12a to 12c is supported by the second support member 43 on the transfer bar 26, and the working stations 11a to 1c are processed.
It is loaded into 1d.

When the transfer bar 26 is retracted from the second position P2 to the third position P3 in the process of transferring the work 13, the work 13 is moved from below the jig 48 by the fixing member 46 as shown in FIG. It is pressed against the jig 48 and positioned and fixed at a predetermined processing position. Therefore, it is not necessary to install a work fixing mechanism for positioning and fixing the work 13 in each of the processing stations 11a to 11d separately from the transfer device, and the structure of the processing station can be simplified.

In particular, in this embodiment, the positioning pin 49 of the jig 48 is installed downward at each of the processing stations 11a to 11d. Then, the work 13 is simply pushed up by the fixing member 46 on the transfer bar 26, is pressed against the jig 48 from below the jig 48, and is engaged with the positioning pin 49 to be positioned and fixed. Therefore, the work 13 can be positioned and fixed easily and reliably with a simple structure without providing a special work fixing mechanism.

Moreover, in this embodiment, the fixing member 46 is swingably attached to the transfer bar 26 via the disc spring 52. Therefore, when the work 13 is positioned and fixed at the processing position, the work 13 and the jig 48 or the fixing member 46 for fixing the work 13 due to a slight positional deviation between the jig 48 and the transfer bar 26 or the like. Even if it takes an unreasonable force, it will be released. Therefore, the work 13 can be properly positioned and fixed at a predetermined processing position, and there is no fear that the work 13, the jig 48, the fixing member 46, and the like will be loaded and damaged.

Further, in the transfer device of this embodiment, the transport mechanisms 14a to 14d are individually arranged between the processing stations 11a to 11d, and the transport of the work 13 is performed independently by the transport mechanisms 14a to 14d. It is supposed to be. Therefore, processing station 1
1a ~ 11d increase or decrease, processing station 11a ~
If you need to change the layout of 11d,
These changes can be easily made, and the layout of the processing line can be freely performed.

Further, since the respective transport mechanisms 14a-14d are driven independently, the respective processing stations 11a-11
According to the layout of d, the transport mechanisms 14a to 14d can be operated so as not to interfere with the processing areas of the processing stations 11a to 11d, and can be easily arranged.

The present invention can be modified and embodied as follows. (1) The configurations of the transport mechanisms 14a to 14d should be changed appropriately. (2) Change the structure of the fixing means appropriately.

(3) First and second moving bodies 30, 34
Is configured to be driven by a cylinder.

[0042]

Since the present invention is constructed as described above, it has the following effects. According to the invention described in claim 1, when the work is positioned and fixed at a predetermined processing position in the processing station, it is not necessary to install a work fixing mechanism separately from the transfer device, and the structure of the processing station is simplified. You can

According to the second aspect of the present invention, it is easy to increase or decrease the number of processing stations and change the layout, and the layout of the processing line can be freely performed. Further, according to the layout of each processing station, the transport mechanism can be easily arranged without interfering with the processing area of the processing station.

According to the third aspect of the present invention, since the work is pressed against the jig from below to perform the positioning and fixing, the positioning and fixing can be performed with a simple structure without providing a special work fixing mechanism. It can be done easily and reliably.

According to the invention as set forth in claim 4, when the work is positioned and fixed at the processing position, even if an unreasonable force is applied to the work and the fixing means for fixing the work, the force is released. Therefore, the work can be properly positioned and fixed, and there is no fear that the work, the fixing means, or the like will be loaded and damaged.

[Brief description of drawings]

FIG. 1 is a front view of a main part showing an embodiment of a transfer device according to the present invention.

FIG. 2 is a front view of a state in which a transfer device is arranged between a plurality of processing devices.

FIG. 3 is a plan view of a main part of the transfer device shown in FIG.

FIG. 4 is an enlarged front view showing a holding state of a work in a processing device.

FIG. 5 is a partially enlarged front view showing a mounting structure of a fixing member.

FIG. 6 is a front view of the main part showing the operating state of FIG.

[Explanation of symbols]

11a to 11d ... Machining station, 13 ... Work piece, 1
4a to 14d ... Transport mechanism, 19 ... First link, 22 ... Second link, 24 ... Elevating bar, 26 ... Transfer bar,
33 ... Elevating motor, 38 ... Moving motor, 42 ... First
Supporting member, 43 ... Second supporting member, 46 ... Fixing member as fixing means, 48 ... Jig, 49 ... Positioning pin, 52 ...
Belleville spring as an elastic member.

Claims (4)

[Claims] 1. A transfer device comprising a transfer mechanism for transferring a work between a plurality of processing stations, wherein the transfer mechanism is provided with a fixing means for positioning and fixing the work at a processing position of the processing station. 2. The transfer device according to claim 1, wherein the transfer mechanism is individually arranged between a plurality of processing stations. 3. A positioning pin of a jig for holding the work at a processing position is installed downward at each of the processing stations, and the fixing means pushes the work against the jig from below by pushing up the work. The transfer device according to claim 1, wherein the positioning and fixing are performed. 4. The transfer device according to claim 1, wherein the fixing means is swingably attached to a transfer mechanism via an elastic member.