JPH0539788Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) This invention relates to an improvement of a feed bar device in a transfer processing machine that performs two-dimensional or three-dimensional transfer processing on a workpiece.

(Prior Art) In transfer processing machines such as transfer presses, the feed bar is divided into three parts: a workpiece loading side, a workpiece unloading side, and a bolster section, since this causes trouble when changing molds.

Generally, these divided parts are usually connected by bolts, etc., and each time the mold is replaced, the bolts are removed and the feed bar is divided into a bolster section, a feed bar on the workpiece loading side, and a feed bar on the unloading side.

(Problem to be solved by the invention) However, there was a problem in that it required a lot of labor and time to attach and detach the feed bar each time the mold was replaced.

Furthermore, when connecting the divided feed bars, a driving device such as an air cylinder is required to move the feed bar in the longitudinal direction of the feed bar, which is expensive.

The purpose of this invention is to provide a feed bar device for a transfer processing machine that can easily and reliably connect and divide the feed bar in a short time when changing molds, in order to improve the above-mentioned problems. It is in.

[Structure of the idea]

(Means for Solving the Problems) In order to achieve the above object, this invention divides the feed bar into a center feed bar at the center and side feed bars at both ends of the center feed bar. , and a feed bar device configured such that the center feed bar and each side feed bar can be freely connected to each other, and each connecting plate fixed to the end of each side feed bar has both ends of the center feed bar attached to the tip of each connection plate. An engagement pin that can be freely engaged and disengaged is provided in a first engagement hole in a direction perpendicular to the longitudinal direction provided near the center feed bar, and a longitudinal A hydraulic cylinder is attached to each of the connection plates, and includes a wedge-shaped portion that is reciprocally movable and biased in the engaging direction.

(Example) Hereinafter, an example of this invention will be described in detail based on the drawings.

Referring to FIG. 6, a transfer press 1 as a transfer processing machine that performs two-dimensional feeding or three-dimensional feeding, for example, includes a frame 3 and a bolster 5 to which a lower die (not shown) can be attached.
A ram 7 to which an upper die (not shown) can be attached is provided so as to be movable up and down. A first actuating device 9 is attached to the left side of the bolster 5, and a second actuating device 11 is attached to the right side.

The first actuating device 9 supports one end of a feed bar 13 that extends in the left-right direction and is provided in parallel, and the second actuating device 11 supports the other end of the feed bar 13 and operates the feed bar 13. .

The first actuating device 9 and the second actuating device 11 have almost the same structure for operating near the end of the feed bar 13, and are already well known, so a detailed description of the structure will be omitted. Although omitted, the feed bar 13 is configured to perform clamp-unclamp, advance-return, and lift-down operations during three-dimensional feeding.

The first actuating device 9 includes a transmission shaft 17 that is operatively connected to an eccentric shaft 15 for raising and lowering the ram 7.
It is interlocked and connected so as to operate in synchronization with the eccentric shaft 15 via the eccentric shaft 15. The first actuating device 9 and the second actuating device 11 are provided with first and second synchronizing shafts (not shown) that are eccentric in the left-right direction and rotatably supported by the frame 3 so as to operate synchronously. are interlocked and connected via.

The feed bar 13 includes a center feed bar 13C of the bolster 5, and side feed bars 13R and 13L on the workpiece loading and unloading sides that are detachably connected to both sides of the center feed bar 13C.
It is made up of.

Since the connection state of the center feed bar 13C and the side feed bars 13R, 13L is almost the same, the connection state of the center feed bar 13C and side feed bar 13R will be explained, and the connection state of the center feed bar 13C and side feed bar 13L will be explained. Explanation will be omitted.

The right end of the center feed bar 13C is detachably connected to the left end of the side feed bar 13R. More specifically, as shown in FIGS. 1, 2, and 3, a tapered portion 19 with a step is formed at the upper right end portion of the center feed bar 13C. An engagement hole 21 as an engaged portion is formed in this tapered portion 19, and a bush 23 is mounted in this engagement hole 21.

As shown in FIGS. 1, 2, and 4, an engagement hole 25 as an engaged portion is formed in the side of the right end of the center feed bar 13C. The matching hole 25 is provided with an engaging pin 27 having a flat portion 27S formed therein.

On the other hand, the side feed bar 13R is provided so as to be slidable in the left-right direction in FIG. 1 while being guided by a guide rail 29 by a drive device (not shown). A connecting block 31 is attached to the upper left surface of the side feed bar 13R with bolts 33, and a connecting plate 35 extending in the left-right direction is attached to the connecting block 31 with a plurality of bolts 37.

Approximately in the center on the left side of the connection plate 35 is an engagement pin 3 to be engaged with the engagement hole 21.
9 is attached with screws 41. Further, the side feed bar 1 is provided at the bottom of the connection plate 35.
Hydraulic cylinder 4 is in contact with the left end of 3R.
3 is attached with a plurality of bolts 45.

A lid portion 47 having a protrusion 47T at its axial center is attached to the rear portion of the hydraulic cylinder 43. A cylinder chamber 49 is formed in the hydraulic cylinder 43 in front of the lid portion 47 (on the left side in FIG. 1), and a piston having an inclined surface 51K as a wedge-shaped portion at the tip thereof is formed in the cylinder chamber 49. 51 is provided so as to be slidable in the left and right direction.

A hole 53 is formed in the axial center of the piston 51, and this hole 53 and the protrusion 47 of the lid portion 47
A spring 55 is interposed between T and T to normally bias the piston 51 to the left.

As shown in FIGS. 1 and 5, on the front side (left side in FIG. 1) of the cylinder 43, the inclined surface 51K of the piston 51 engages with the flat portion 27S of the engagement pin 27. A sensor 57 such as a proximity switch is mounted from above the connection plate 35 to detect whether the connection plate 35 is connected or not.

In the cylinder chamber 49, oil passages 59 and 61 for sliding the piston 51 in the left and right direction are formed in the lid portion 47 and the hydraulic cylinder 43, and the oil passages 59 and 61 have joints 63 and 65, respectively. It is connected to a hydraulic pressure supply source (not shown) via the hydraulic pressure supply source.

Note that a cover 69 is attached to the connecting plate 35 with screws 67, and the connecting plate 35
is covered.

With the above configuration, when the side feed bar 13R is connected to the center feed bar 13C, the side feed bar 13R is located above the center feed bar 13C, as shown by the two-dot chain line in FIG. By lowering the side feed bar 13R, the engagement pin 39 attached to the left side of the connecting plate 35 is inserted into the engagement hole 21 provided at the right end of the center feed bar 13C via the bush 23. inserted and engaged.

Next, pressure oil is supplied to the cylinder chamber 49 of the hydraulic cylinder 43 via the oil passage 59 from a hydraulic supply source (not shown).
1, the piston 51 slides to the left in FIG. As a result, piston 5
1 is inserted into the engagement hole 25 of the center feed bar 13C, and engages while contacting the flat part 27S of the engagement pin 27 provided in the engagement hole 25. . That is,
A wedge effect is obtained by the action of the flat portion 27S of the engagement pin 27 and the inclined surface 51K of the piston 51, and the connection is ensured.

In this way, the upper and side parts of the right end of the center feed bar 13C are similar to the side feed bar 1.
It can be connected to 3R easily, reliably and in a short time more firmly than before. Moreover, since the right end of the center feed bar 13C is engaged from above, a small hydraulic cylinder can be used for connection from the side, rather than a large one, and the connection plate can be compactly formed. It can be provided at the bottom of 35.

Further, the connected state of the side feed bar 13R to the center feed bar 13C can be detected by a sensor 57 provided on the front side of the hydraulic cylinder 43, and operation due to disconnection can be prevented.

The side feed bar 13R can be removed from the center feed bar 13C by performing the reverse operation of the above-described operation. When pressure oil is supplied to the cylinder chamber 49 through the oil passage 61, the piston 51 moves to the right in FIG. slide. As a result, piston 5
The inclined surface 51K, which is the tip of the engagement pin 27, separates from the flat part 27S of the engagement pin 27 and also comes out of the engagement hole 25. Next, by lifting the side feed bar 13R upward, the engagement pin 39 is inserted into the engagement hole 2.
The side frame 13R is removed from the center feed bar 13C by being removed from the center feed bar 13C via the bush 23 and then moving the side feed bar 13R to the right in FIG. 1 while being guided by the guide rail 29.

Although the state of connection and removal of the side feed bar 13R with respect to the center feed bar 13C has been described, the structure and operation of the side feed bar 13L with respect to the center feed bar 13C are almost the same, so the explanation will be omitted.

In this way, the upper and side portions at both ends of the center feed bar 13C are connected to the side feed bars 13.
They are detachably connected by R and 13L. Furthermore, the attachment/detachment operation can be performed more easily, more reliably, and in a shorter time than in the past.

Note that this invention is not limited to the embodiments described above, and can be implemented in other forms by making appropriate changes.

[Effect of idea]

As can be understood from the description of the embodiments above, the present invention is based on the long feed bar 13.
, with the center feed bar 13C on the center side,
A feed bar device is formed by dividing the center feed bar 13C into side feed bars 13R, 13L on both end sides, and in which the center feed bar 13 and each side feed bar 13R, 13L are configured to be freely connectable. A first engagement hole 21 in a direction perpendicular to the longitudinal direction is provided near both ends of the center feed bar 13C at the tip of each connection plate 35 fixed to the end of each side feed bar 13R, 13L. A wedge-shaped portion 51 that can be freely engaged and disengaged from the longitudinal direction is provided with an engagement pin 39 that can be engaged and disengaged from the second engagement hole 25 provided on both end surfaces of the center feed bar 13C.
A hydraulic cylinder 43 having a reciprocating cylinder K is attached to each of the connecting plates 35.

As is clear from the above configuration, in the present invention, at the tip of each connection plate 35 fixed to the end of each side feed bar 13R, 13L, there is a first feed bar provided near the end of the center feed bar 13C. An engagement pin 39 is provided in the engagement hole 21 and can be freely engaged and disengaged. A hydraulic cylinder 43 is provided with a wedge-shaped portion 51K that can freely engage and disengage from the longitudinal direction of the engagement hole 25 provided in the end surface of the center feed bar 13C and is biased in the direction of reciprocation and engagement.
is attached to the connection plate 35.

Therefore, according to the present invention, the engagement pin 39 is inserted into the first engagement hole 21 of the center feed bar 13C.
By engaging each side feed bar 1
Positioning is performed in the longitudinal direction of 3R and 13L and in the direction orthogonal to the longitudinal direction. The center feed bar 13C is fixed to each of the side feed bars 13R and 13L by engaging the wedge-shaped portion with a second engagement hole 25 provided on the end surface of the center feed bar 13C and holding it under pressure. It is. That is, since the center feed bar 13C is in a state where both wedge portions on both ends engage with the second engagement hole 25 and are pressed from both ends, when the feed bar is driven, the hydraulic cylinder 43 is temporarily pressed. It is safe even if the pressure drops for some reason.

That is, according to the present invention, the positioning function is achieved by the engagement between the first engagement hole 21 and the engagement pin 39, and the fixing function of the center feed bar 13C is achieved by the engagement between the second engagement hole 25 and the wedge-shaped portion. Since these are separate, the center feed bar 13C can be accurately positioned with respect to both side feed bars 13R, 13L, and each feed bar 13R,
The connection between the feed bar 13L and the feed bar 13C is reliably and firmly established, and the above-mentioned effects can be obtained.

[Brief explanation of the drawing]

Fig. 1 is an enlarged sectional view of the I arrow section in Fig. 5, Fig. 2 is a plan view in Fig. 1, Fig. 3 is an enlarged sectional view taken along the - line in Fig. 1, and Fig. 4 is an enlarged sectional view taken along the - line in Fig.
The figure is an enlarged sectional view taken along the - line in Fig. 1, Fig. 5 is an enlarged sectional view taken along the - line in Fig. 1, and Fig. 6 is a front view of a transfer press according to an embodiment of this invention. It is a schematic diagram. 1... Transfer press, 5... Bolster, 13... Feed bar, 13C... Center feed bar, 13R, 13L... Side feed bar, 21, 25... Engaging hole (engaged part), 27,
39...Engaging pin (engaging part), 27S...Flat part,
35... Connection plate, 43... Hydraulic cylinder,
49...Cylinder chamber, 51...Piston, 51K
... Inclined surface, 57 ... sensor.

Claims (1)

[Scope of utility model registration request] The long feed bar 13 is divided into a center feed bar 13C on the center side, side feed bars 13R on both ends of the center feed bar 13C,
13L, and the center feed bar 13 and each side feed bar 13R, 1.
3L, and the respective side feed bars 13R, 1.
At the tip of each connection plate 35 fixed to the end of the center feed bar 13C, a first plate in a direction perpendicular to the longitudinal direction is provided near both ends of the center feed bar 13C.
An engagement pin 39 that can be engaged and disengaged from the engagement hole 21 is provided, and a wedge-shaped portion 51K that can be engaged and disengaged from the longitudinal direction is provided in each of the second engagement holes 25 provided on both end surfaces of the center feed bar 13C. A feed bar device for a transfer processing machine, characterized in that a hydraulic cylinder 43 is attached to each of the connection plates 35 and is reciprocally movable and biased in the direction of engagement.