JP2005211935A - Transfer feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transfer feeder which has a crossbar capable of easily avoiding interference with dies without increasing the cost while ensuring the productivity. <P>SOLUTION: A transfer feeder 1 does not use a known straight crossbar but a crossbar 4 of a deformed shape provided with a recess part 42. Interference with an upper die 100 can be avoided by the recess part 42. Thus, there is no need to ground the upper die 100, lower the productivity, set any unreasonable feeder motion, or change the slide operation mode from the continuous operation to the intermittent operation. The interference of the upper die 100 with the crossbar 4 can be easily and economically avoided while an original press body and the upper die 100 are used without change. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a transfer feeder, for example, a transfer feeder used in a transfer press.

  Conventionally, a transfer press provided with a plurality of processing stations in a press body is provided with a transfer feeder so as to sequentially convey a workpiece to each processing station. Such a transfer feeder includes a pair of parallel lift beams arranged on both sides in the workpiece conveyance direction, and a straight cross bar is installed between the lift beams (for example, Patent Documents). 1).

The crossbar is provided with a vacuum cup for holding the workpiece, and is attached to the lift beam via a carrier that moves along the longitudinal direction of the lift beam. The workpiece is transferred to the next process while being held by the vacuum cup.
The movement of the crossbar at this time is a so-called rectangular motion. In other words, the workpiece is held down by a vacuum cup at a pick-up point, lifted by a relatively large lift and moved to advance motion, and released at a release point in the next process to release the workpiece. After a relatively small lift, it moves to return motion.

By the way, FIG. 9 schematically shows the entire outline of the molds (upper mold 100 and lower mold 200) installed in the press body.
In FIG. 9, prismatic heel guides 101 and 201 protrude from four corners of an upper mold 100 and a lower mold 200 in a substantially rectangular plane so as to face each other in the vertical direction. Of these heel guides 101 and 201, first, the heel guide 201 of the lower mold 200 is in contact with the active surfaces 301 at the four corners of the draw ring (wrinkle presser for the workpiece W) 300 provided on the lower mold 200. The heel guide 201 guides the vertical movement of the draw ring 300.
On the other hand, the heel guide 101 of the upper mold 100 gradually comes into contact with the active surface 301 of the draw ring 300 when the upper mold 100 is lowered together with a slide (not shown), while the slide reaches the bottom dead center. The upper surface 100 is guided by the activity surface 301 so that it does not rattle.

  In other words, as a result of the heel guide 101 of the upper mold 100 being guided by the active surface 301, when the slide is at the bottom dead center position, as shown in FIG. At the same time, the active surface 301 of the drawing 300 is in contact with the heel guides 101 and 201 of the upper mold 100 and the lower mold 200 in the vertical direction. As a result, the heel guides 101 and 201 are opposed to each other in the vertical direction and can be pressed in a state in which no rattling occurs in the mold.

JP 9-314258 A

In FIG. 10, in addition to the above-described mold, the trajectory of the cross bar 400 is indicated by a one-dot chain line. The upper closed loop locus represents the rectangular motion of the crossbar 400.
The lower locus represents the interference curve I between the upper mold 100 and the crossbar 400. The interference curve is a curve representing the positional relationship between the slide and the upper mold when the viewpoint is placed on the crossbar. That is, it is a curve for verifying whether or not the upper mold 100 and the crossbar 400 interfere when the crossbar 400 is driven with the illustrated rectangular motion.

In the case shown in FIG. 10, the interference curve I overlaps with the heel guide 101 of the upper mold 100, which means that the cross bar 400 collides with the heel guide 101 during the rectangular motion. This state will be described with reference to FIG. 11 (cross section XI-XI in FIG. 9). When the slide starts to rise from the bottom dead center position, the crossbar 400 is in the middle of return movement, but the upper mold 100 In order to hold the workpiece W before it fully rises, it tries to enter the mold, so that it collides with the heel guide 101 of the upper mold 100 before entering.
In addition, when the workpiece W is released from the vacuum cup 500 and is withdrawn from the mold, the heel guide 101 of the lower mold 100 and the cross bar 400 may interfere with each other.

In such a situation, the following method is usually used to avoid interference between the mold (in this case, the upper mold 100) and the crossbar 400.
A: The interfering heel guide 101 is cut and removed to make an irregular shape.
B: The slide stroke is increased, and the cross bar 400 is moved in and out in a state where the clearance from the mold is ensured.
C: The slide is changed from continuous operation to intermittent operation, and the crossbar 400 is moved in and out while the slide is stopped at the top dead center side.

  However, the above method A is uneconomical because it requires labor and cost for cutting. In the method B, since the time during which the crossbar 400 stays in the interference area with the mold is shortened, the production speed cannot be increased. Also, if the motion of the feeder is determined in accordance with the production speed of the press, the acceleration applied to the crossbar 400 increases, causing misfeeding. Furthermore, in the method C, since the slide is stopped at the top dead center for each shot, the productivity is deteriorated.

  An object of the present invention is to provide a transfer feeder including a crossbar that can easily avoid interference with a mold without incurring costs while ensuring productivity.

  The transfer feeder according to claim 1 of the present invention includes a pair of lift beams arranged in parallel along the flow direction of the workpiece, and a cross bar movably mounted on these lift beams along the longitudinal direction thereof. The crossbar is provided with a relief portion for avoiding interference with the mold side.

  The transfer feeder according to claim 2 of the present invention is the transfer feeder according to claim 1, wherein the escape portion of the crossbar is bent in the middle in the longitudinal direction of the crossbar. .

  A transfer feeder according to a third aspect of the present invention is the transfer feeder according to the second aspect, wherein the escape portion of the cross bar is bent in a substantially vertical plane.

  A transfer feeder according to a fourth aspect of the present invention is the transfer feeder according to the second aspect, wherein the escape portion of the cross bar is bent in a substantially horizontal plane.

  The transfer feeder according to claim 5 of the present invention is the transfer feeder according to any one of claims 2 to 4, wherein the escape portion of the crossbar is bent by the thickness of the crossbar. And it forms by joining the outer peripheral surfaces of a pair of crossbar formation member which has the same thickness.

  The transfer feeder according to claim 6 of the present invention is the transfer feeder according to claim 5, wherein the escape portion of the cross bar is reinforced by a reinforcing plate straddling the pair of cross bar forming members. It is characterized by.

  According to the first aspect of the present invention, since the deformed crossbar provided with the escape portion is used instead of the straight conventional crossbar, the escape portion can avoid interference with the mold. Therefore, there is no need to cut the mold, reduce productivity, set an unreasonable feeder motion, or change the slide operation mode from continuous operation to intermittent operation. As it is, the interference between the mold and the cross bar can be easily avoided.

  According to the second aspect of the present invention, the relief portion is a simple structure obtained by providing a bent shape in the middle of the crossbar in the longitudinal direction. In addition, due to the simple structure, even when a new crossbar is required to correspond to different molds, it can be handled with a design change such as changing the position of the bent portion.

  According to the invention of claim 3, since the escape portion is bent in a substantially vertical plane, for example, as shown in FIG. 9, interference with a heel guide or the like protruding in the vertical direction from the mold side is avoided. Therefore, new entry / exit of the cross bar with respect to the mold is surely performed.

  According to the invention of claim 4, since the relief portion is bent in a substantially horizontal plane, for example, as shown in FIG. 8, it protrudes toward the mold side near the pick-up point of the work (near the center of gravity of the work). When there is a portion, the workpiece is picked up reliably while avoiding interference with the protruding portion.

According to the invention of claim 5, instead of actually bending one crossbar forming member to provide a bent-shaped relief portion, two crossbar forming members having the same thickness are used. Since it is provided in a bent shape by shifting the ends and joining the outer peripheral surfaces together, a bending amount corresponding to the thickness of the crossbar is easily ensured. Therefore, when a large amount of bending is not necessary, that is, when the amount of bending corresponding to the thickness of the crossbar forming member is sufficient, the manufacturing becomes easy and is particularly useful.
In addition, since the amount of bending is equal to the thickness of the crossbar, it is possible to satisfactorily counter the moment generated during the transfer of the workpiece, and there is no fear that the posture will be unstable due to a large twist.

  According to the sixth aspect of the present invention, since the joint portion of the two crossbar forming members is reinforced by the reinforcing plate, it is possible to more reliably counter the moment, and when carrying a heavy workpiece or the crossbar It can be sufficiently applied to high-speed movements.

[First Embodiment]
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment of the invention will be described with reference to the drawings.
FIG. 1 is a perspective view illustrating main components of the transfer feeder 1 according to the first embodiment. In FIG. 1, the press main body and the mold of the transfer press are not shown, but the upper mold 100 and the lower mold 200 shown in FIG. 9 are assumed as the mold.

  In FIG. 1, the transfer feeder 1 includes a pair of lift beams 2 and 2 arranged in parallel along the conveying direction of the workpiece W (FIG. 9), and a carrier that moves along the longitudinal direction of the lift beams 2 and 2. 3 and 3 and a crossbar 4 that is fixed to the carrier 3 at both ends so as to be movable to the lift beams 2 and 2 via these carriers 3 and 3.

The lift beam 2 and the carrier 3 have a configuration conventionally used.
For example, the lift beam 2 can be of a continuous type over the entire length of the transfer press line or can be divided into a plurality of types, and is provided so as to be lifted up and down by any drive means such as a servo motor.
One carrier 3 is moved along the lift beam 2 by a linear motor or the like. That is, a primary coil is provided on the carrier 3 side, and a secondary conductor or secondary permanent magnet is provided on the lift beam 2 side so as to face the primary coil, thereby constituting a linear motor.

  The cross bar 4 includes a center-side work holding portion 41 and both end-side escape portions 42, and the work holding portion 41 is provided with a plurality (four in this embodiment) of vacuum cups 500. . Since the vacuum cup 500 that is generally used can be applied, description thereof is omitted here.

  Specifically, as shown in FIG. 2 in an enlarged manner, the work holding portion 41 is formed by a first crossbar forming member 44 having a square cross section and a hollow shape. The size of one side of the first crossbar forming member 44 is not particularly limited, but is about 150 mm in the present embodiment. Both ends of the first crossbar forming member 44 are cut obliquely at an angle of about 30 ° (60 °), and the opening at the end is closed by welding of the closing member 45 or the like. However, it may be possible to leave the opening portion open in order to break the air supply tube of the vacuum cup 500.

  The escape portion 42 is provided in a bent shape with respect to the workpiece holding portion 41. That is, the escape portion 42 is bent downward in the vertical plane. However, actually, the first crossbar forming member 44 is not provided by bending, but the second crossbar forming member 46 having the same cross-sectional shape and cross-sectional dimension (thickness) The crossbar 4 is formed by joining to the lower surface of the crossbar forming member 44 by welding or the like, so that it is apparently bent by the thickness of the crossbar 4.

  At this time, the joining end side of the second crossbar forming member 46 is also obliquely cut at 30 ° (60 °), and the crossbar forming members 44 and 46 abut each other on the outer peripheral surface on the 30 ° cutting side. It is joined in the state of letting. Although not shown, the opening of the end of the second crossbar forming member 46 is also closed as necessary, and the other end is detachably connected to the carrier 3 by a connecting means (not shown).

  A rhombus-shaped reinforcing plate 47 is straddled at the joint portion between the crossbar forming members 44 and 46, and the joint portion is reinforced from both sides. Such a reinforcing plate 47 is also joined by welding or the like. In the crossbar 4 having such a configuration, the workpiece holding portion 41 passes between the heel guides 101 of the upper mold 100 and the escape portion 42 passes below the heel guide 101 during the movement. The cross bar 4 and the upper mold 100 can avoid interference with each other.

  That is, according to the interference curve I shown in FIG. 3, the solid line portion representing the trajectory of the work holding portion 41 of the crossbar 4 is certainly drawn so as to overlap with the heel guide 101. In order to pass between the heel guides 101, there is no interference. Further, the alternate long and short dash line portion indicating the locus of the escape portion 42 does not overlap with the heel guide 101 of the upper mold 100 because it is shifted downward with respect to the workpiece holding portion 41, meaning that it does not interfere. In FIG. 4, the rectangular motion locus of the crossbar 4 is drawn. As is clear from this figure, even if the work holding portion 41 moves into the mold in this state, the heel guide 101 does not move. Similarly, the escape portion 42 does not interfere because it passes below the heel guide 101.

According to this embodiment, there are the following effects.
(1) That is, in the transfer feeder 1, the crossbar 4 having a deformed shape including the escape portion 42 is used instead of the straight conventional crossbar. Interference can be avoided. Therefore, there is no need to cut the upper die 100, reduce productivity, set an unreasonable feeder motion, or change the slide operation mode from continuous operation to intermittent operation. While using the mold 100 as it is, the interference between the upper mold 100 and the crossbar 4 can be easily avoided, which is economical.

(2) Since the escape portion 42 has a simple structure provided in a bent shape in the middle of the crossbar 4 in the longitudinal direction, the escape portion 42 can be easily manufactured simply by joining the two crossbar forming members 44 and 46. . In addition, since the structure is simple, even when a new crossbar 4 is required to correspond to different upper molds 100, it is possible to easily cope with a design change such as changing the position of the bent portion.

(3) The escape portion 42 has a shape that is bent in a substantially vertical plane with respect to the work holding portion 41, and thus the escape portion 42 passes below the heel guide 101 that protrudes vertically from the upper mold 100. Accordingly, interference with the heel guide 101 can be avoided particularly in the upper mold 100, and the carrying-in / out of the cross bar 4 with respect to the mold can be reliably performed.

(4) The escape portion 42 is not formed by bending a single crossbar forming member, but using two crossbar forming members 44 and 46 having the same thickness. Since these end portions are shifted and joined at the outer peripheral surfaces, they are provided in a bent shape. Therefore, the bending amount corresponding to the thickness of the crossbar 4 can be easily secured, and the manufacture can be facilitated.

(5) Moreover, since the bending amount is small by the thickness of the cross bar 4, it can well resist the moment generated during the transfer of the workpiece W and prevent the posture from becoming unstable due to a large twist. it can.

(6) Furthermore, since the joint portion of the two crossbar forming members 44 and 46 is reinforced by the reinforcing plate 47, it is possible to more reliably counter the moment and transport a heavy workpiece W or cross The present invention can be applied to high speed movement of the bar 4 and the like.

[Second Embodiment]
A second embodiment of the present invention will be described with reference to FIGS.
The crossbar 4 used in the present embodiment is provided corresponding to the mold shown in FIG. In this mold, two sets of the upper mold 100 and the lower mold 200 are used in one process. That is, it is a two-casting mold that takes two products W by carrying two workpieces W in one process and processing with two separate molds. Also in these molds, heel guides 101 and 201 are provided at the four corners of the upper mold 100 and the lower mold 200, and the crossbar 4 of the present embodiment also interferes with the heel guide 101 of the upper mold 100 in particular. It is provided to avoid.

  That is, as shown in FIG. 6, such a crossbar 4 has a structure in which escape portions 42 are provided at both ends and the center in the longitudinal direction, and two work holding portions 41 are provided between the escape portions 42. The structures of the work holding part 41 and the escape part 42 are substantially the same as those in the first embodiment. The center relief portion 42 is, of course, provided to avoid the heel guides 101 and 101 of the two upper molds 100 that are close to each other.

  Even when the crossbar 4 having such a configuration is used, the above-described effects (1) to (6) of the first embodiment can be similarly obtained.

[Third Embodiment]
A third embodiment of the present invention will be described with reference to FIGS.
In the crossbar 4 of the present embodiment, as shown in FIG. 7, the escape portion 42 is bent in a substantially horizontal plane with respect to the carrier mounting portions 48 on both sides, that is, on the upstream side in the center of the crossbar 4. It is provided in an offset state (however, an offset toward the downstream side is also conceivable). Therefore, in this embodiment, the vacuum cup 500 is provided in the escape portion 42. In the present embodiment, the escape portion 42 is formed by actually bending one crossbar forming member 49, and the bending amount is larger than the thickness of the crossbar 4, and the carrier mounting portion The escape portion 42 is largely offset from 48.

  Although such a crossbar 4 is not considered to interfere with the heel guide 101 as a matter of course, for example, as shown in FIG. 8, even when the position corresponding to the center of gravity of the workpiece W protrudes largely upward. The lift portion is provided so as not to interfere with the protruding portion. In other words, when the conventional straight crossbar having no escape portion 42 is used, if the lower mold 200 has the protruding portion 202, when the workpiece W is picked up, it interferes on the lower mold 200 side and the workpiece W Cannot be held. However, according to the cross bar 4 of the present embodiment, since the escape portion 42 is provided so as to be offset in the horizontal direction, there is no such problem.

(7) According to the present embodiment, since the escape portion 42 is bent in a substantially horizontal plane, the protruding portion 202 is provided on the lower mold 200 side near the pickup point of the workpiece W (near the center of gravity of the workpiece). Even if it is, the workpiece W can be picked up while avoiding interference with the protruding portion 202, and the workpiece W can be transported without hindrance.

In addition, this invention is not limited to the said embodiment, Including other structures etc. which can achieve the objective of this invention, the deformation | transformation etc. which are shown below are also contained in this invention.
For example, in the third embodiment, the carrier attachment portion 48 and the escape portion 42 are formed by actually bending one crossbar forming member 49. However, the carrier attachment portion 48 and the escape portion 42 are also formed. As in the first and second embodiments, two types of crossbar forming members 44 and 46 may be used.
On the contrary, even if the escape portion 42 bent in the vertical plane as in the first and second embodiments is formed by the single crossbar forming member 49 as in the third embodiment, it is included in the present invention. It is.

Further, although not shown, a plurality of escape portions 42 offset in the horizontal direction may be provided in the middle of the longitudinal direction of the crossbar 4. In the third embodiment, the protrusions are formed by the escape portions 42 offset in the horizontal direction. However, when the protruding amount of the protruding portion 202 is small, the escape portion 42 may be provided in a bent shape so as to escape upward. In this case, the overall shape of the crossbar 4 is substantially similar to that of the first embodiment, but the central portion of the crossbar 4 is merely the escape portion 42 and both sides thereof are carrier mounting portions 48.

  The number and shape of the relief portions according to the present invention are not limited to the above embodiment, and may be arbitrarily determined in consideration of the shape on the mold side. Therefore, for example, in addition to the heel guides 101 and 201 in which interference is a problem, in the case where the protruding portion 202 of the lower mold 200 as shown in FIG. 8 exists, the first escape portion bent in the vertical plane, It is also conceivable that a second relief portion bent in the horizontal plane is provided.

  Furthermore, the transfer feeder of the present invention may be applied to a transfer press in which a slide is provided for each process. Further, in a tandem press line in which a plurality of presses are arranged in a row, it can also be applied as a transfer feeder installed between the presses.

The best configuration, method and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this. That is, the invention has been illustrated and described primarily with respect to particular embodiments, but may be configured for the above-described embodiments without departing from the scope and spirit of the invention. Various modifications can be made by those skilled in the art in terms of quantity, other details, and the like.
Therefore, the description limited to the shape, quantity and the like disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such restrictions is included in this invention.

  The cross bar used in the transfer feeder of the present invention is a cross bar constructed between lift beams provided independently for each process in addition to a cross bar constructed between lift beams continuous over the entire transfer press line. It can also be applied to bars.

The perspective view which shows the main structural members of the transfer feeder which concerns on 1st Embodiment of this invention. The perspective view which expands and shows a main structural member. The figure for demonstrating the interference state in 1st Embodiment. The figure for demonstrating the interference state in 1st Embodiment. The perspective view which shows the metal mold | die used by 2nd Embodiment of this invention. The perspective view which shows the main structural members of the transfer feeder which concerns on 2nd Embodiment. The top view which shows the main structural members of the transfer feeder which concerns on 3rd Embodiment of this invention. The figure for demonstrating the interference state in 3rd Embodiment. The perspective view which shows the metal mold | die conventionally used. The figure for demonstrating the conventional interference state. The figure for demonstrating the conventional interference state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Transfer feeder, 2 ... Lift beam, 4 ... Crossbar, 42 ... Escape part, 44 ... 1st crossbar formation member, 46 ... 2nd crossbar formation member, 47 ... Reinforcement plate, 100 ... Upper mold | type, 200 ... Lower mold, W ... Workpiece.

Claims (6)

In the transfer feeder,
A pair of lift beams (2) arranged in parallel along the flow direction of the workpiece (W);
These lift beams (2) are provided with a cross bar (4) movably installed along the longitudinal direction thereof,
A transfer feeder (1) characterized in that the crossbar (4) is provided with an escape portion (42) for avoiding interference with the mold (100, 200) side. Transfer feeder (1) according to claim 1,
The relief part (42) of the cross bar (4) has a shape bent in the middle of the longitudinal direction of the cross bar (4). The transfer feeder (1). Transfer feeder (1) according to claim 2,
The transfer feeder (1), wherein the relief portion (42) of the crossbar (4) is bent in a substantially vertical plane. Transfer feeder (1) according to claim 2,
The transfer feeder (1), wherein the relief portion (42) of the cross bar (4) is bent in a substantially horizontal plane. In the transfer feeder (1) according to any one of claims 2 to 4,
The escape portion (42) of the crossbar (4) has a shape bent by the thickness of the crossbar (4), and the outer periphery of a pair of crossbar forming members (44, 46) having the same thickness. A transfer feeder (1) characterized in that it is formed by joining the surfaces together. In the transfer feeder (1) according to claim 5,
The relief portion (42) of the cross bar (4) is reinforced by a reinforcing plate (47) straddling the pair of cross bar forming members (44, 46). ).

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