JPH0715632Y2 - Conveyor structure of press section - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a conveyor structure of a press unit provided in an assembly line or a processing line for parts and the like.

[Conventional technology]

In a factory that assembles or processes industrial products, etc., a press section is set in the middle of a series of conveyor lines such as an assembly line or a processing line, and a press machine is installed in this press section, and it is conveyed by the conveyor line. There is a case where the work of pressing the parts to be performed is performed, and an example of the conventional conveyor structure of the pressing section in such a conveyor line will be described below.

FIG. 4 is a perspective view showing an appearance of a conventional conveyor structure of a press section in a conveyor line, and FIG. 5 is a sectional view of a main part of FIG.

In the figure, 1 is a component such as a bearing, 2 is a component such as a housing into which the component 1 is press-fitted, 3 is a jig for holding the component 2 (component holding jig), and a predetermined jig on the jig 3 A knock pin 4 is provided at the position.

Reference numeral 5 is a rail having an L-shaped cross section, and two rails 5 are provided in parallel on a frame 6 arranged at a predetermined interval, and both side surfaces of each frame 6 are flat for stability. A conveyor line that is connected to each other by bars 7 and that includes the jig 3, the rail 5, the frame 6, the flat bar 7 and the like passes through various steps of assembly or processing. The tool 3 is conveyed on the rail 5 in the arrow a direction.

8 is a pedestal provided on one side of the press section set in the middle of the conveyor line, 9 is a press machine provided on the gantry 8, and 10 is attached to a vertically movable ram of the press machine 9. A punch 11 is a positioning stopper having a V-shaped groove 12 at its tip, and the positioning stopper 11 is movable in the direction of arrow b, which is orthogonal to the direction of arrow a in the previous term.

By the way, there are generally a tact feeding method and a free flow method as a method of conveying the jig 3 by the conveyor line, but here, it is assumed that the tact feeding method is adopted.

In this tact feeding method, as shown in FIG. 4, the jig 3 is closely placed so as to straddle the two rails 5, and the feeding means (not shown) arranged upstream in the conveying direction makes By pushing the jigs 3, all the jigs 3 are slid all together on the rails 5 in the direction of the arrow a. In FIG. 4, in order to clarify the configuration of the press machine 9, etc. Shows only two.

Further, in the tact feeding method, the jig 3 is conveyed in synchronization with each working process including the pressing process, and the jig 3 slides on the rail 5 by one length by one conveying operation. At this time, in the pressing portion, the positioning stopper 11 of the pressing machine is moved, and the V groove 12 is engaged with the knock pin 4 to position the jig 3, and then the pressing operation is started. It has become a thing.

Next, the operation of the above configuration will be described.

First, the jig 3 closely arranged on the rail 5 is conveyed in the direction of the arrow a by the feeding means, and the component 2 is placed on the jig 3 by a component supply device (not shown) or manual work in the preceding step of the pressing step. Supplied. The jig 3 is provided with a positioning means such as a positioning pin (not shown).
The supplied component 2 is positioned by this positioning means.

After that, when the jig 3 is further conveyed by the feeding means in the direction of the arrow a and enters the press portion where the press machine 9 is provided, the positioning stopper 11 advances in the direction of the arrow b and its V groove 12 is formed. The knock pin 4 of the jig 3 is engaged with the jig 3, so that the jig 3 is positioned immediately below the press 9.

Here, the component 1 is supplied from the direction of arrow c to the central portion of the component 2 on the jig 3 by a component supply device (not shown) or manually, and then the press machine 9 is operated to lower the punch 10 to move the component 1 Is press-fitted into the part 2.

When the press-fitting is completed by pressing in this way, the punch 10 rises, the positioning stopper 11 retracts and the V groove 12 is disengaged from the knock pin 4, whereby the jig 3 is released, and then the press-fitting becomes integrated as described above. Parts 1 to 2
Is conveyed to the next step on the rail 5 together with the jig 3.

The above method is generally the simplest method of press-fitting the component 1 into the component 2, but in this case, the larger the pressing force of the pressing machine, the larger the load applied to the jig 3 and the rail 5, In order to prevent the jigs 3 and rails 5 from warping and breaking due to the load, the jigs 3 and rails 5 may be increased in thickness or the number of frames 6 may be increased.
It is necessary to increase the rigidity of the conveyor and the jig 3 by taking measures such as arranging just under the position where the load is applied.

On the other hand, as another method other than this, there is a method of providing a load receiving mechanism below the rail 5 in the pressing portion.

FIG. 6 is a sectional view showing a conventional conveyor structure having the load receiving mechanism. In the figure, 13 is the load receiving mechanism,
The load receiving mechanism 13 is a jig receiving device which is arranged so as to face the punch 10 of the press 9 through the jig 3 on the rail 5.
14, a rod 15 to which the jig receiver 14 is attached, a drive source 16 such as an air cylinder for vertically moving the jig receiver 14 via the rod 15, and a mount 17 supporting the drive source 16. It has.

The conveyor and the press 9 are the same as those shown in FIGS. 4 and 5.

The operation in this configuration is as follows.

First, the jig 3 on which the component 2 is placed is conveyed to the press section, and the positioning stopper 11 moves forward to position the jig 3. Then, the drive source 16 of the load receiving mechanism 13 and the jig 15 together with the jig 15. The receiver 14 rises in the direction of arrow d, whereby the jig receiver 14 slightly lifts the jig 3 within the range of the clearance f between the rail 5 and the positioning stopper 11.

In this state, as in the case described above, the component 1 is supplied from the direction of the arrow c to the central portion of the component 2 on the jig 3, and then the press machine 9 is operated to lower the punch 10 to move the component 1 to the component 2 Press in.

Thereafter, as the punch 10 rises, the driving source 16 causes the jig receiver 14 together with the rod 15 to descend in the direction of the arrow e, the jig 3 rides on the rail 5 again, and the positioning stopper 11 retreats. The parts 1 and 2 which have become are conveyed to the next process together with the jig 3.

If the load receiving mechanism 13 is used as described above, the jig 3 can be received with a force larger than the load applied by the press machine 9, so that it is not necessary to increase the rigidity of the conveyor and the jig 3.

[Problems to be solved by the device]

However, according to the above-mentioned conventional technique, in the former conveyor structure, as the pressing force is increased, the thickness of jigs and rails is increased, or the number of frames is increased, or the frame is arranged directly below the position where the load is applied. Since it is necessary to take measures such as increasing the rigidity of jigs and rails, it not only increases the cost of the conveyor line, but also increases the weight of jigs, etc. At the same time as it is necessary to improve the strength of the entire length, it is necessary to increase the size of the feeding means for carrying the jig, which results in a significant increase in cost as a whole.

Also, in the latter conveyor structure using the load receiving mechanism,
Since it is possible to receive the jig with a force greater than the load applied by the press machine, it is not necessary to increase the rigidity of the jig or rail, but when using a large press machine with a large press force, the load receiving mechanism However, there is a problem in that the load receiving mechanism becomes expensive and mounting of the conveyor line becomes difficult because the size is increased according to the press machine.

The present invention has been made to solve such a problem, and it is not necessary to increase the rigidity of jigs or rails or provide a load receiving mechanism even when using a press machine having a large pressing force. It is an object of the present invention to realize a compact and inexpensive conveyor structure for a press section.

[Means for Solving the Problems]

In order to achieve this object, the present invention is a conveyor structure of a press section for pressing a component on a component holding jig conveyed on a rail of the conveyor line by a press machine of a press section arranged in the middle of the conveyor line. By dividing the rail in the press section from the front and rear rails, the rail is formed to have a length substantially equal to the length of the component holding jig,
A short rail movably supported in the operating direction of the press, short rail positioning means for positioning the short rail at a position connecting the front and rear rails before and after the operation of the press, and an end portion for holding the component. A load receiving jig formed to have a size penetrating through the through hole provided in the jig, the press machine operates, and the short rail moves as the parts on the parts holding jig are pushed and moved. The end portion of the load receiving jig penetrates the through hole of the component holding jig and abuts on the component.

[Action]

According to the present invention having such a configuration, when the component on the component holding jig positioned on the short rail is pushed by the operation of the press machine, the component holding jig and the short rail are moved together with the component on the load receiving jig side. The end of the load receiving jig is fitted into the through hole of the component holding jig and abuts on the component on the component holding jig.

After that, the component is pressed by further pressing the component by the operation of the press machine, and after the press, the short rail is moved to the original height by the short rail positioning means as the press machine returns to the original state. Will be returned.

Therefore, according to this, the load applied by the press machine when pressing the parts is applied to the load receiving jig, and almost no load is applied to the rail and the part holding jig. Therefore, a press machine having a large pressing force is used. Even with a simple configuration, it is possible to increase the rigidity of component holding jigs, rails, etc.
An inexpensive and small conveyor structure can be realized.

〔Example〕

 An embodiment will be described below with reference to the drawings.

FIG. 1 is a perspective view showing the appearance of a conveyor structure of a press section according to the present invention, and FIGS. 2 (I) to (IV) are operation process diagrams of the embodiment taken along the line AA of FIG.

In the figure, 1 and 2 are parts, 3 is a jig (part holding jig),
Reference numeral 4 is a knock pin, 5 is a rail, 9 is a press, 10 is a punch, 11 is a positioning stopper, and 12 is a V groove. These are the same elements as those of the conventional one (FIGS. 4 to 5). Although not described individually, the jig 3 in this embodiment
As shown in FIG. 2, a through hole 18 smaller than the outer diameter and smaller than the inner diameter of the component 2 is provided in the central portion of the.

Further, the rail 5 constitutes a conveyor line together with a frame, a flat bar and the like (not shown), and the stroke of the punch 10 by the press machine 9 is the dimension shown in FIG. The length is increased by l (the movable amount of the short rail 5a described later).

5a is two short rails, and these short rails 5a are formed independently of the front and rear rails 5 in the press section set in the middle of the conveyor line, and the length thereof is the same as that of the jig 3. The dimensions are almost the same.

Reference numeral 19 is a joint bar for maintaining the parallelism of the two short rails 5a, and the two short rails 5a are joined and fixed by the joint bar 19 at the front end portion and the rear end portion, respectively. Guide shafts 20 are erected at the four corners on both sides of the lower surface of the short rail 5a which are joined and fixed by a bar 19.

Reference numeral 21 denotes a pedestal arranged below the rail 5 in the pressing section, and the pressing machine 9 is installed at a position of one end of the pedestal 21, that is, a portion projected to the outside of the rail 5.

Reference numeral 22 is a guide bush for holding the guide shaft 20 so that it can move up and down.
It is embedded and fixed so as to penetrate through the plate thickness of the upper part of 21, and the short rail 5a is supported on the pedestal 21 by inserting the guide shaft 20 into the guide bushes 22, respectively.

Reference numeral 23 is a coil spring as an urging means attached to the outer periphery of each guide shaft 20 so as to be located between the short rail 5a and the guide bush 22, and 24 is the lower end of each guide shaft 20 protruding from the guide bush 22. It is a stopper attached by screwing or the like to the upper end of the short rail 5a, which is constantly urged upward by the coil spring 23, by the stopper 24 so as to be located at the same height as the rail 5. There is.

That is, the stopper 24, together with the coil spring 23 in this embodiment, constitutes short rail positioning means for positioning the short rail 5a at a position where the short rail 5a is connected to the front and rear rails 5 before and after the operation of the press machine 9.

Reference numeral 25 is a load receiving jig fixed on the pedestal 21, and the diameter of at least the upper end portion of the load receiving jig 25 is slightly smaller than the diameter of the through hole 18 provided in the jig 3. The upper end can be fitted into the through hole 18.

Next, the operation of the above configuration will be described.

First, the jigs 3 closely arranged on the rails 5 are conveyed in the direction of the arrow a by the feeding means (not shown) as in the conventional example, and the parts 2 are fed by a parts feeding device (not shown) or by a manual operation before the pressing step. Are supplied onto the jig 3. The jig 3 is provided with positioning means such as a positioning pin (not shown), and the supplied component 2 is positioned by this positioning means.

After that, when the jig 3 is conveyed in the direction of the arrow a by the feeding means to be mounted on the short rail 5a of the press section where the press machine 9 is provided, the jig 3 is shown in FIGS. 1 and 2 (I). As shown, the positioning stopper 11 advances in the direction of the arrow b and its V groove 12 engages with the knock pin 4 of the jig 3, whereby the jig 3 is positioned immediately below the press 9.

The punch 10 of the press 9 and the load receiving jig 25 on the pedestal 21
The shaft centers of the jigs 3 are aligned in advance, and when the jig 3 is positioned directly below the press machine 9, the jig 3 is placed on the load receiving jig 25.
The through hole 18 is located.

Here, the component 1 is supplied from the direction of arrow c to the central portion of the component 2 on the jig 3 by a component supply device (not shown) or manually, and then the press machine 9 is operated to lower the punch 10 to move the component 1 Abut and press.

As a result, the components 1, 2 and the jig 3 are lowered together with the short rail 5a against the urging force of the coil spring 23, and the lower end of the load receiving jig 25 causes the upper end portion of the load receiving jig 25 to move as shown in FIG. As shown in FIG. 4), it is fitted into the through hole 18 of the jig 3 and abuts the lower surface of the component 2.

After that, the punch 10 further descends, and as a result, as shown in FIG.
The component 1 is press-fitted into the component 2 as shown in I). Since the component 2 is in contact with the load receiving jig 25 as described above, the load of the press is not applied to the rail 5, the short rail 5a and the jig 3, but is applied to the load receiving jig 25.

When press-fitting is completed by pressing in this way, Fig. 2 (IV)
As shown in FIG. 5, the punch 10 rises, and the restoring force of the coil spring 23 pushes up the short rail 5a to a position where the short rail 5a and the rail 5 are aligned with each other.

As a result, the jig 3 is released, and the parts 1 and 2 integrated by the press-fitting are conveyed to the next step on the rail 5 together with the jig 3.

The above operation is repeated every time the jig 3 is sent onto the short rail 5a, but this series of operations is controlled by a controller (not shown).

Next, another embodiment will be described.

In the above-described embodiment, the component 1 is supplied from above the component 2 and then press-fitted by the press machine 9. However, the component 1 may be supplied from below the component 2 to perform press-fitting. .

FIG. 3 is a sectional view of an essential part showing an embodiment in the case of performing such press-fitting. In this embodiment, the vertical stroke of the short rail 5a is lengthened to extend from the lower surface of the short rail 5a to the upper surface of the load receiving jig 25. By increasing the distance between the parts 1, the component 1 can be directly supplied onto the load receiving jig 25, and the vertical stroke of the press machine 9 is lengthened accordingly.

According to this structure, the jig 3 to which the component 2 is supplied is fixed to the short rail by the positioning stopper 13 as in the above embodiment.
The component 1 can be press-fitted from below the component 2 by positioning on the 5a and supplying the component 2 onto the load receiving jig 25, and then lowering the punch by the press machine 9.

Also, other than this, by changing the vertical stroke of the short rail 5a and the press machine, it is possible to press-fit two parts (not shown) at the same time from the vertical direction of the parts (not shown) supplied to the jig 3. This is efficient because the parts on the jig 3 can be pressed in from two directions on the conveyor without inverting the parts.

In addition, although the above-mentioned embodiments have been described by exemplifying the press-fitting of the parts, the present invention is not limited to this, and when presses other than the press-fitting, such as bending, are performed on the parts on various jigs. It is also applicable to.

[Effect of device]

As described above, according to the present invention, the rail in the press section is divided into the front and rear rails so that the rail has a length substantially equal to the length of the component holding jig, and is supported movably in the operating direction of the press. Short rails, short rail positioning means for positioning the short rails at positions where the short rails are connected to the front and rear rails before and after the operation of the press machine, and the end portions are dimensioned to penetrate through holes provided in the component holding jig. As a configuration including the load receiving jig, the short rail moves as the component on the component holding jig is pushed and moves when the press machine operates, and the end portion of the load receiving jig is moved. The through hole of the component holding jig is penetrated to come into contact with the component.

Therefore, according to this, since the load applied by the press machine when pressing the parts is applied to the load receiving jig and the rail and the member holding jig are hardly applied, a press machine having a large press force is used. Even with a simple configuration, it is possible to realize a low-priced and compact conveyor structure compared to the conventional case where the rigidity of the component holding jig or rail is increased or a load receiving mechanism is installed. The effect of being able to do is obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing the appearance of a conveyor structure of a press unit according to the present invention, FIG. 2 is an operation process diagram of an embodiment taken along the line AA of FIG. 1, and FIG. 3 is another embodiment of the present invention. FIG. 4 is a perspective view showing the appearance of a conventional conveyor structure of a press section, FIG. 5 is a cross-sectional view of a main part of FIG. 4, and FIG.
FIG. 1 is a sectional view showing a conventional conveyor structure having a load receiving mechanism. 1,2: Parts, 3: Jig 4: Knock pin, 5: Rail 5a: Short rail, 10: Punch 11: Positioning stopper, 12: V groove 18: Through hole, 20: Guide shaft 21: Frame, 22: Guide Bush 23: Coil spring, 24: Stopper

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-61-191100 (JP, A) Actual development S58-144521 (JP, U) JP-B 56-11538 (JP, B2)

Claims (1)

[Scope of utility model registration request] 1. A conveyor structure of a press section for pressing a component on a component holding jig conveyed on a rail of a conveyor line by a press machine of a press section arranged in the middle of the conveyor line. Is divided into front and rear rails to have a length substantially equal to the length of the component holding jig, and a short rail movably supported in the operating direction of the press machine; Before and after the operation of, a short rail positioning means positioned at a position to be connected to the front and rear rails, and a load receiving jig formed to have an end portion penetrating a through hole provided in the component holding jig, As the pressing machine operates, the short rail moves as the component on the component holding jig is pushed and moves, and the end of the load receiving jig penetrates the through hole of the component holding jig. A conveyor structure for a press section, which is in contact with the component.