JPH0531544A - Blank feeding device for press - Google Patents

Abstract

PURPOSE:To smoothly feed either blanks, magnetic or non-magnetic. CONSTITUTION:In the blank feeding device for the press, which is constituted of a sucking/lifting means 10 by which stacked blanks W are sucked and lifted with a vacuum cup and an intermediate conveying means 20 by which the blank taken from the vacuum cup 13 is conveyed, while being held, to the side of the press 1; the intermediate conveying means 20 is constituted of a fixed duct 21 which has plural sucking holes 22 on the lower side and is extended to the conveying direction, a movable duct 25 which has plural sucking holes 26 on the lower side and is extended to the conveying direction, a driving means 31 by which the movable duct is intermittently moved back and forth in the conveying direction, a means 41 by which the movable duct is moved up and down against the fixed duct, and a blower device 61 which is connected to both fixed and movable ducts and by which a negative pressure to suck in the air into the sucking holes of each duct is generated. The constitution is such that the blank which is taken out from a blanking press 7 via a take-out means 70 is conveyed directly to the side of the press.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blank material feeding device for a press machine.

[0002]

2. Description of the Related Art A suction / lifting means for sucking a topmost blank material among the blank materials stacked on a pallet with a vacuum cup and lifting it to a predetermined height, and a blank material withdrawn from the vacuum cup. A blank material supply device for a press machine, which comprises an intermediate transfer means for intermittently transferring to the press machine side (for example, JP-A-2-13312).
No. 4) is known.

[0003] Further, the press machine side is provided with holding means for taking out blank materials punched by a blanking press die for producing blank materials from coil materials one by one, and the blank materials received from the taking means. There is known a blank material feeding device for a press machine (for example, Japanese Patent Laid-Open No. 1-165131) that includes an intermediate feeding unit that feeds the sheet to the sheet.

The conventional structure of such an intermediate conveying means is generally formed by either a so-called shuttle system using a magnet or a vacuum cup capable of lateral transfer, or a system using a magnetic attraction belt conveyor. Is.

[0005]

However, a magnetic material irrespective of the method cannot deal with the non-magnetic blank material which has been increasing with the diversification. Moreover, it is very difficult to remove or prevent the adhesion of fine iron powder. Further, the one using a magnet easily scratches the blank, while the one using a belt conveyor is apt to damage the belt. On the other hand, in the case of using a vacuum cup, the number of vacuum cups that can be installed is practically limited due to space and maintenance problems. Therefore, in order to accommodate blanks having different shapes, for example, a rack or pinion mechanism is used. It is necessary to install some kind of position adjustment means such as incorporating Also,
There is a problem with the vacuum cup durability.

An object of the present invention is to provide a blank material supplying device for a press machine which has a simple structure and is highly durable and can smoothly convey non-magnetic blank material.

[0007]

According to a first aspect of the present invention, a suction / lifting means for sucking and lifting stacked stacks of blank material by a vacuum cup and a blank material pulled from the vacuum cup are held. In a blank material supply device for a press machine comprising an intermediate transfer means for transferring to the press machine side, the intermediate transfer means comprises a fixed duct having a plurality of suction holes on a lower surface side and extending in a transfer direction of the blank material, and a lower surface. A movable duct having a plurality of suction holes on the side and extending in the carrying direction; a reciprocating driving means for intermittently reciprocating the movable duct in the carrying direction; and a vertical driving means for vertically moving the movable duct with respect to the fixed duct. A blower device connected to the fixed duct and the movable duct to generate a negative pressure for sucking air in each suction hole.

Further, in the invention of claim 2, the blanking material punched out by the blanking press is taken out one by one, and the blank material received from this taking-out means is held and conveyed to the press machine side. In a blank material supply device for a press machine comprising a conveying means, the intermediate conveying means has a fixed duct having a plurality of suction holes on the upper surface side and extending in the conveying direction of the blank material, and a plurality of suction holes on the upper surface side. A movable duct that extends in the transport direction, and a reciprocating drive unit that intermittently reciprocates the movable duct in the transport direction;
And a blower device that is connected to the fixed duct and the movable duct to generate negative pressure for sucking air in the suction holes of the fixed duct and the movable duct. And

[0009]

According to the first aspect of the invention, the blank material lifted by the suction / lifting means is sucked to the lower surface side of the movable duct at the backward limit and the downward limit. When the reciprocating driving means moves (moves forward) through the movable duct, the blank material advances to the next stage while being adsorbed and held, and then is moved up by the vertical driving means together with the movable duct and delivered to the lower surface of the fixed duct. Then, the movable duct is moved back (retracted) and lowered. During this downward movement, the blank material that has been adsorbed and held in the fixed duct until then is peeled off from the fixed duct and adsorbed again to the lower surface of the movable duct. By repeating the above operation, the blank material received from the suction / lifting means can be conveyed to the final stage of the fixed duct while advancing by a predetermined pitch. The blank material conveyed to the final stage is conveyed to the mold by the fever of the transfer mechanism in the press machine.

Further, in the second aspect of the invention, the blank material is adsorbed from the take-out means to the upper surface side of the movable duct which is at the backward limit and the upward limit. When the reciprocating driving means moves forward (advance) in the movable duct, the blank material advances to the next stage while being adsorbed and held, and is then transferred from the upper surface of the movable duct lowered by the vertical driving means to the upper surface of the fixed duct. . Subsequently, the movable duct is moved back (retracted) and raised. During this ascending movement, the blank material that has been adsorbed and held on the upper surface of the fixed duct until then is peeled from the fixed duct and adsorbed again on the upper surface of the movable duct. By repeating the above operation, the blank material received from the take-out means can be transported to the final stage of the fixed duct while advancing by a predetermined pitch. The subsequent transportation to the press machine is the same as in the case of claim 1.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) As shown in FIGS. 1 and 2, the present apparatus comprises a suction / lifting means 10 and an intermediate transfer means 20, and the intermediate transfer means 20 includes a fixed duct (21) and a movable duct (2).
5), reciprocating drive means (31), vertical drive means (41) and blower device (61).

In FIG. 1, reference numeral 1 denotes a press machine, including a first die arranged on a first stage STG1, and second, third, ... dies arranged at a predetermined pitch (ST). . Each die has a pair of reciprocating movements (advance / return operation) in the left-right direction in FIGS. 1 and 2 and a clamping / unclamping operation (approaching in the up-down direction in FIG. 2) by a predetermined pitch (ST). The blank material W is sequentially supplied by the feed bars 2 and 2.

Numeral 10 is a suction / lifting means, which is composed of a cylinder 11, a piston rod 12, and a vacuum cup 13, and the blank materials W stacked below a predetermined position (first stage) P1 are moved upward one by one. It is a publicly known thing to be lifted.

The intermediate transfer means 20 moves the blank material W received from the suction / lifting means 10 (13) by a predetermined pitch (ST) in the transfer direction (to the right in FIG. 1) and moves to the fifth (final) position. ) It is formed so that it can be transported to the stage P5. The blank material W that has reached the final stage P5
Is dropped on the chute 3 shown in FIG. 1 and is held on the chute 3 until it is taken away by the feed bar 2.

First, as shown in FIG. 1, the fixed duct 21 forming a part of the intermediate conveying means 20 is fixed to the frame 5 by the post 6. In this embodiment, as shown in FIG. 2, a pair of left and right arranged in parallel is provided for a total of four units (21, 2).
1, 21, 21). Each fixed duct 21 is made of a hollow member extending in the carrying direction, and a plurality of small-diameter suction holes 22 are provided in a row on the lower surface side. On the other hand, a suction pipe 63 described later in detail is connected to the exhaust pipe 24 on the upper surface side.

The right end portion 23 of each fixed duct 21 is not provided with a suction hole 22. As described above, the blank material W conveyed to the final stage P5 is the shooter 3
This is because it is dropped upward and is carried into the press machine 1 side by the feed bars 2 and 2 here.

On the other hand, the pair of movable ducts 25, 25 are arranged in parallel between each pair of fixed ducts 21, 21 and are reciprocated (forward / backward) by a reciprocating drive means 31 and a vertical drive means 41 which will be described later. Moved up and down. Each movable duct 2
The reference numeral 5 is a hollow member that extends in the carrying direction like the fixed duct 21. Further, a plurality of small-diameter suction holes 26 are provided in two rows on the lower surface thereof. Both movable ducts 25, 25
Are connected by communication ducts 27 and 28, and a blower device 61 is connected to the communication duct 27 via a flexible suction duct 64.

As shown in FIG. 1, the vertical driving means 41 has a pair of left and right link bars 47, 59 having rollers 49, 59 fitted in the lateral grooves 29 (FIG. 2) of each movable duct 25. 57 and the link bars 47, 57 to the shafts 44, 5
It is composed of a cylinder device 42 and the like for rotating around 4.

Specifically, the link bar 47 (57) is rotatably supported on the frame 5 by the shaft 44 (54). Pins 4 are on the rollers 49, 59 side of both link bars 47, 57.
A connecting member 52 is connected via 8, 58 in a synchronous manner. The base end of the cylinder device 42 is rotatably supported by a bracket integral with the frame 5 via a pin 46, and the tip end of the piston rod 43 is connected to a link bar 47.
Is rotatably connected to the tip of the pin by a pin 45. Each roller 4
9, 59 can slide in the lateral groove 29.

Therefore, if the cylinder device 42 is driven (the piston rod 43 is projected and retracted), both link bars 47,
Since 57 rotates about the shafts 44 and 54, as a result, both movable ducts 25 and 25 can be moved up and down at the same time.

As shown in FIG. 3, which is represented by the locus of the lower surface of the movable duct, the vertical movement is the upper limit of the lower surface of the movable duct 25 above the lower surface of the fixed duct 21,
This is performed between the lower limit where the lower surface of the movable duct is below the lower surface of the fixed duct. The blank material W can be received from the vacuum cup 13 when the movable duct 25 is at the lower limit, and the blank material W held on the lower surface of the movable duct 25 is fixed while moving from the lower limit to the upper limit. The positional relationship is such that it can be delivered to the lower surface of the duct 21. On the other hand, the blank material W can be delivered from the fixed duct 21 to the movable duct 25 while moving from the ascending limit to the descending limit.

Next, the reciprocating driving means 31 is used for the movable duct 2
5 is a means for intermittently reciprocating (forward / backward) by a predetermined pitch (ST) in the conveying direction. In this embodiment, the advance / return operating force of the feed bars 2 and 2 is used as a power source. ing. That is, the reciprocating driving means 3
1 is a pair of slide guides 33, 33 connected to each feed bar 2 by columns 32, as shown in FIGS.
A pair of drive bars 34, 34 connecting the slide guide 33 (33) and the corresponding movable duct 25 (25).
(34, 34) and.

As shown in the lower side of FIG. 2, each drive bar 34 is mounted in a guide groove 33A of a slide guide 33 so as to be slidable in the vertical direction and positionally restricted in the horizontal direction in FIG. There is. Therefore, the feed bars 2, 2
Move forward (to the left in FIG. 2), both movable ducts 25, 2
It is also possible to move 5 forwards at the same time and backwards. That is, the two movable ducts 25, 25 are arranged at the predetermined pitch S.
It can reciprocate by T. At this time, the feed bars 2 and 2 are cranked and unclamped (approaching and separating in the vertical direction in Fig. 2).
Even if it operates, since each drive bar 34 slides in the guide groove 33A, it does not hinder the movable duct 25.

By driving and controlling the reciprocating driving means 31 and the vertical driving means 41 at a predetermined timing, both movable ducts 25, 25 can be simultaneously moved in parallelogram shown in FIG.

Next, as shown in FIG. 1, the blower device 61 comprises a blower 62, four suction pipes 63 and one flexible suction duct 64, and the tip of each suction pipe 63 is movable. Connected to the exhaust pipe 24 of the duct 21,
Moreover, the tip of the suction duct 64 is connected to the communication duct 27.

That is, by driving the blower device 61, negative pressure for air suction can be generated in the suction holes 22 and 26 of the fixed duct 21 and the movable duct 25, respectively. That is, the blank material W can be adsorbed and held on the lower surfaces of the ducts 21 and 25, and when the blank material W is adsorbed on the lower surfaces of the ducts 21 and 25,
Since a negative pressure is formed in each of the ducts 21 and 25, that is, on the upper surface side of the blank material W, and atmospheric pressure is applied to the lower surface side of the blank material W, the suction pressure can be securely held by suction due to the increase in the differential pressure.

The cylinder device 4 of the vertical drive means 41
2 can output the power that can peel off the blank material adsorbed and held in each duct 21, 25.

Next, the operation of the first embodiment will be described.
Consider a case where the movable duct 25 is at the backward limit and the downward limit shown in FIGS. Further, it is assumed that the blower device 61 is driven and a negative pressure is generated in each fixed duct 21 and movable duct 25, that is, each suction hole 22, 26.

At this point, one piece of blank material W is lifted up by the vacuum cup 13 of the suction / lifting means 10. Then, the blank material W is pressed against the lower surface of the movable duct 25 and, at the same time, sucked and held by the negative pressure. Since the negative pressure suction method is used, the non-magnetic blank material W can be surely sucked.

Subsequently, the feed bars 2 and 2 advance in the right direction by one pitch ST in FIG. 1, that is, the reciprocating driving means 31 works to move the movable ducts 25 and 25 forward by one pitch ST with the lower limit. . Therefore, the blank material W received by the first stage P1 can be conveyed to the second stage P2 while being suction-held on the lower surface of the movable duct 25.

Next, the cylinder device 4 of the vertical drive means 41
2 works to rotate the link bar 47 about the shaft 44. Then, the rollers 49 and 59 ascend while sliding in the side groove 29 to move the movable ducts 25 and 25 upward from the lower limit to the upper limit shown in FIG.

During this process, the blank material W adsorbed and held on the lower surfaces of the movable ducts 25, 25 is fixed to the fixed duct 21,
When it hits the lower surface of the 21, 21, 21, it is then peeled off from the movable duct 25 and adsorbed and held by each fixed duct 21. That is, the blank material W is delivered to the fixed duct 21 in the second stage P2. At this stage, the blank material W received from the suction / lifting means 10 is advanced by 1 pitch ST in the transport direction.

Next, when the feed bars 2 and 2 perform a return operation, that is, when the reciprocating drive means 31 moves back (backward),
The movable ducts 25, 25 are retracted by one pitch ST with the rising limit shown in FIG. Cylinder device 4 at the backward limit
2 reversely moves the movable ducts 25, 25 downward toward the lower limit. In the middle of this, first the fixed ducts 21 and 2
The first blank material W that has been adsorbed and held at the position corresponding to the second stage P2 of 1, 21, 21 is transferred to the lower surface of the movable ducts 25, 25 that descend.

Thus, the movable duct 2 which has reached the lower limit
The next (second) blank material W is pressed from the suction / lifting means 10 to the lower surfaces of the 5, 25. Therefore, at this stage, one pitch ST is formed on the lower surface of the movable ducts 25, 25.
The second and first blanks W, separated by only
W is adsorbed and held.

Next, when the movable ducts 25 are moved forward by one pitch ST again, the second blank material W moves from the first stage P1 to the second stage P2 and the first blank material W moves to the second stage P2. It is conveyed from the stage P2 to the third stage P3. Therefore, if the reciprocating driving means 31 and the up-and-down driving means 41 are similarly repeatedly operated, the blank material W can be conveyed one pitch at a time toward the fifth (final) stage P5.

In the fifth stage P5, the movable duct 2
When 5 and 25 move up, the blank material W adsorbed and held by this is abutted against the lower surface of each fixed duct 21, but since the suction hole 22 is not provided at the right end 23 thereof, it is peeled off. The blank material W is the lower shooter 3
Fall on.

The blank material W on the shooter 3 is then clamped by the feed bars 2 and 2 so that the feed bars 2 and
It is gripped by 2 and is carried to the mold in the press machine 1 by its advance operation.

According to the first embodiment, however, the intermediate conveying means 20 is composed of the fixed duct 21, the movable duct 25, the reciprocating driving means 31, the vertical driving means 41 and the blower device 61, and a plurality of suction holes are provided. Since the blank W is conveyed to the press machine 1 side while being suction-held by the negative pressure of 22, 26, even the non-magnetic blank W can be smoothly conveyed. Of course, since the magnetic blank material W can also be smoothly transported, it is possible to cope with a supply mode in which the magnetic blank material and the non-magnetic blank material are changed for each lot. Moreover, since it is the negative pressure suction method, it is possible to eliminate the damage of the blank material W by using the conventional magnet, the damage of the belt by the belt conveyor method, the adhesion of iron powder by the magnetic force, the attachment of the adjusting means by the vacuum cup method, etc., and the low cost. Can be downsized.

Further, the fixed duct 21 and the movable duct 25
Has a simple structure in which the suction holes 22 and 26 are provided in the hollow member, so that cost reduction can be achieved and the cause of failure is eliminated. Parts consumption is also eliminated. Moreover, regardless of the form of the blank W, stable adsorption is possible. Further, the suction surface (lower surface) of each duct 21, 25 can be cleaned by operating the blower device 61 in reverse.

Further, since the reciprocating drive means 31 is configured to utilize the advance / return operating force of the feed bars 2 and 2, the reciprocating (back and forth) movement of both movable ducts 25 and 25 is performed by the feed bars 2 and 2. The blank material W can be supplied to the press machine 1 at an optimum timing because it can be completely synchronized with the advance / return operation of.

Further, the blower device 61 includes the ducts 2
Since only one unit is required for 1, 21, 21, 21, 25, 25, the structure is simple, the size and cost are low, and the handling is extremely easy.

(Second Embodiment) The second embodiment is shown in FIG. This intermediate conveying means 20 is basically constructed so that the upper and lower sides are opposite to those in the case of the first embodiment. That is, the blank material W produced by the blanking press 7 is taken out one by one by the take-out means 70 (cylinder 71, piston rod 72, vacuum cup 73), and is fed directly to the press machine 1. It is supposed to form the device.

Therefore, the fixed duct 21, the movable duct 25, the reciprocating driving means 31, the vertical driving means 41, and the blower device 61 can be arranged upside down so that the respective constituent elements 21, 25, 31, Since they are basically the same as 41 and 61, their description is omitted except for the following differences.

That is, the suction holes 22 and 26 are provided on the upper surfaces of the fixed duct 21 and the movable duct 25, respectively. A suction hole 22 is also provided at the right end 23 of each fixed duct 21. In this embodiment, the blank material W is placed at the same position as the fifth stage P5 of the first embodiment.
This is because it is formed such that the blank material W is suction-held on the upper surface of the fixed duct 21 for posture stabilization, and the blank material W is gripped by the feed bars 2 and 2 and supplied into the press machine 1. Since the plan view corresponds to FIG. 2 (bottom view) of the first embodiment, it is omitted.

In the second embodiment having such a structure, the take-out means 7
0 is the blank material W received from the blanking press 7
When the blanks W are placed one by one on the upper surface of the movable duct 25 which is in the ascending limit and the retreating limit shown in FIG. 5, the blank material W is passed through the upper surface of the fixed duct 21 at a predetermined pitch ST side by the press machine 1 side. Can be transported to. Therefore, also in the case of the second embodiment, the same action and effect as in the case of the first embodiment can be obtained.

[0046]

As described above, according to the invention of claim 1,
A blank for a press machine consisting of a suction / lifting means for sucking and lifting the stacked blank materials with a vacuum cup and an intermediate transfer means for holding the blank material picked up from the vacuum cup and transferring it to the press machine side. In the material supply device, the intermediate conveying means, a fixed duct having a plurality of suction holes on the lower surface side and extending in the conveying direction of the blank material, and a movable duct having a plurality of suction holes on the lower surface side and extending in the conveying direction, Reciprocating drive means for intermittently reciprocating the movable duct in the carrying direction, vertical drive means for vertically moving the movable duct with respect to the fixed duct, and air suction holes connected to the fixed duct and the movable duct for sucking air. Since it is composed of a blower device for generating a negative pressure, the following effects are obtained. Even if the blank material is a non-magnetic material, it can be transported smoothly. In addition, it can accommodate switching between magnetic blank materials and non-magnetic blank materials, and has wide applicability. Since it is a negative pressure suction method using a duct having a plurality of suction holes, the blank material W is not damaged and the constituent elements (belts) are not damaged unlike the conventional belt conveyor method. That is, stable operation can be performed for a long period of time without wasting parts. Compared with the conventional method that uses magnetic force, there is no need to worry about the prevention and removal of iron powder, and it is easier to handle. In addition, the bottom surface (suction surface) of each duct can be easily cleaned by backflowing air. It is sufficient to increase or decrease the number of each duct according to the form of the blank material W, and it is not necessary to attach an adjusting means unlike the conventional vacuum method, so that the cost can be significantly reduced and the applicability is wide.

According to the invention of claim 2, the blank material punched out by the blanking press is taken out one by one, and the blank material received from this taking-out means is held and conveyed to the press machine side. In the blank material supply device for a press machine, which comprises an intermediate transfer means, the intermediate transfer means comprises a fixed duct having a plurality of suction holes on the upper surface side and extending in the transfer direction of the blank material, and a plurality of suction surfaces on the upper surface side. A movable duct having a hole extending in the carrying direction, a reciprocating driving means for intermittently reciprocating the movable duct in the carrying direction, a vertical driving means for vertically moving the movable duct with respect to the fixed duct, a fixed duct and a movable duct. It is composed of a blower device that is connected to the duct and generates negative pressure for air suction in each suction hole. The retrieved blank can be smoothly transported to a press machine as it is. That is, each duct can carry the blank material upward or downward. Of course, the same effect as that of claim 1 is achieved.

[Brief description of drawings]

FIG. 1 is a side view showing a first embodiment of the present invention.

FIG. 2 is a bottom view of the same as seen from the arrow line AA in FIG.

FIG. 3 is a diagram for explaining reciprocating / vertical movement of the movable duct.

FIG. 4 is a side view showing a second embodiment.

FIG. 5 is a diagram for explaining reciprocating / vertical movement of the movable duct.

[Explanation of symbols]

1 Press machine 2 Feed bar 5 frames 6 posts 7 Blanking press 10 Adsorption / lifting means 13 vacuum cup 20 Intermediate transport means 21 Fixed duct 22 Suction hole 23 Right edge 24 exhaust pipe 25 movable duct 26 Suction hole 27, 28 communication duct 29 lateral grooves 31 Reciprocating drive means 32 props 33 Slide guide 33A guide groove 34 Drive bar 41 Vertical drive means 42 cylinder device 43 Piston rod 44 axis 45,46 pin 47 link bar 48 pins 49 Laura 52 Connection member 54 axes 57 Ring Bar 58 pin 59 Laura 61 Blower device 62 Blower 63 Suction tube 64 Flexible suction duct 70 Removal means 73 Vacuum Cup

Claims (2)

[Claims] 1. A suction / lifting means (10) for sucking and lifting a stacked blank material (W) by a vacuum cup (13) and a blank material (W) taken from the vacuum cup (13). In a blank material supply device for a press machine, which comprises an intermediate transfer means (20) for transferring to the press machine (1) side while holding the intermediate transfer means (20), the intermediate transfer means (20) has a plurality of suction holes (22) on the lower surface side. A fixed duct (21) having a plurality of suction holes (2) on the lower surface side and having a fixed duct (21) extending in the conveying direction of the blank material (W).
A movable duct (25) having 6) and extending in the carrying direction;
Reciprocating driving means (31) for intermittently reciprocating the movable duct (25) in the carrying direction, and vertical driving means (4) for vertically moving the movable duct (25) with respect to the fixed duct (21).
1) with fixed duct (21) and movable duct (25)
A blower device (61) connected to the suction holes (22) and (26) for generating a negative pressure for sucking air.
And a blank material supply device for a press machine. 2. A take-out means (7) for taking out the blank materials (W) punched by the blanking press (7) one by one.
0) and an intermediate conveying means (20) for conveying the blank material (W) received from the take-out means (70) to the press machine (1) side while holding the blank material (W). The intermediate transfer means (20) includes a fixed duct (21) having a plurality of suction holes (22) on the upper surface side and extending in the transfer direction of the blank material (W), and a plurality of suction holes (2) on the upper surface side.
A movable duct (25) having 6) and extending in the carrying direction;
Reciprocating driving means (31) for intermittently reciprocating the movable duct (25) in the carrying direction, and vertical driving means (4) for vertically moving the movable duct (25) with respect to the fixed duct (21).
1) with fixed duct (21) and movable duct (25)
A blower device (61) connected to the suction holes (22) and (26) for generating a negative pressure for sucking air.
And a blank material supply device for a press machine.