JPH0428663Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a mechanism for feeding workpieces for press processing to a plurality of press machines arranged at intervals.

(Conventional technology) Generally, when pressing a workpiece, different pressing processes are performed continuously using multiple press machines.
Obtain the final pressed product. When performing such press working, the press machines are arranged at a predetermined interval from each other, and the workpieces for press work are sequentially fed to each press machine by a workpiece feeding mechanism. In this case, the workpiece feeding mechanism is arranged between adjacent press machines so as not to interfere with press processing by each press machine and setup change work for each press machine.

The conventional feeding mechanism has a guide body attached to the main body frame so as to be movable up and down, a slide arm supported by the guide body so as to be movable left and right, and workpiece holding parts provided at both ends of the slide arm. are doing. A fixed table is installed in the center between each press machine.

In the process of the slide arm moving between the two presses, one workpiece holder sends the workpiece placed on the fixed table to the press machine for the next process, and the other workpiece holder sends the workpiece to the press machine for the previous process. The work is carried out from the machine and placed on the fixed table.

(Problem that the invention is trying to solve) In the above configuration, each work holding part must be moved back and forth between each press machine and the fixed table in the center, and the movement stroke of the slide arm is relatively long. , It took time to transport the workpiece, and the efficiency of press processing was poor. Also, in order to prevent the workpiece holding part from interfering with the press machine during press processing using the press machine, the gap between the fixed table and the press machine must be made wider than necessary, and from this point of view, the slide arm The movement stroke became longer, causing a decrease in machining efficiency.

(Means for Solving the Problems) The present invention was made to solve the above problems, and its gist is to transport workpieces to multiple adjacent press machines one after another from the previous process to the next process. In the feeding mechanism, a first loading section is disposed at a position close to the previous process press machine between the previous process press machine and the first next process press machine; a second mounting section disposed at a position close to the next-process press machine between the first next-process press machine and a second next-process press machine that is further subsequent to the first next-process press machine; a third mounting section disposed at a position close to the press machine for the first next step between the two, and transferring the workpiece placed on the first mounting section to the second mounting section. A transfer device having a transfer means, a guide body attached to a main body frame so as to be movable up and down, a slide arm supported horizontally movably on the guide body, and a slide arm provided at one end of the slide arm of the guide body. Along with the vertical movement and the horizontal movement of the slide arm, a first holding section that holds the workpiece on the second mounting section and transports it to the first next-process press machine, the slide arm, etc. A second section is provided at the end and holds the workpiece on the press machine for the next step in the first step and transports it to the third loading section in accordance with the vertical movement of the guide body and the horizontal movement of the slide arm. and a pivot provided between each end of the slide arm and the first and second workpiece holding parts to enable rotational displacement of the first and second workpiece holding parts. A workpiece feeding mechanism for press working, characterized in that it comprises a conveying device installed behind the processing section of each of a plurality of adjacent press machines, from a previous process to a next process, and then to the next process. .

(Function) As the slide arm moves, one workpiece holding section transports the workpiece from the second mounting section to the first press machine for the next process, and the other workpiece holding section transports the workpiece from the second mounting section to the first press machine for the next process.
The workpiece is transferred from the press machine for the next process to the third mounting section, and during press processing, the slide arm is in the central rest position and both workpiece holding sections are rotated by the rotating mechanism to move the mold of the press machine. It is rotating and retreating. Further, the workpiece is moved from the first mounting section to the second mounting section by the transfer device.

(Example) Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 8.

In FIGS. 1 to 3, reference numeral 1A indicates a press machine for the previous process, and 1B indicates a press machine for the next process. These press machines 1A and 1B are lined up with a gap 2 in between. Each press machine 1A, 1B has a lower mold 4 having a workpiece mounting surface 3, and an upper mold 5 that moves up and down. A work for press processing is fed to each of the press machines 1A, 1B by a work feed mechanism 10, which is the gist of the present invention.

The workpiece feeding mechanism 10 will be described in detail below.

Each press machine 1A, 1B, 1C has a conveying device 1.
A main body frame 11 of 0a is arranged. In particular, among these three press machines 1A to 1C, the center press machine 1B will be explained. A guide body 12 is supported on the main body frame 11 so as to be movable up and down. A long slide arm 13 is slidably supported on the guide body 12, and a pair of workpiece holders 14a and 14b are rotatably supported at both ends of the slide arm 13.

As shown in FIG. 6, each workpiece holding section 14a, 14b has a substrate 15, four arms 16 fixed to this substrate 15, and a suction cup 17 fixed to the tip of this arm 16. have. The suction cup 17 is designed to be able to suction a workpiece by means of a vacuum action. In addition, the work holding part 14a,
14b may be configured to hold the workpiece using a magnet.

Each workpiece holder 14a, 14b can be rotated by a rotation mechanism 20 shown in FIG. That is, the case 22 is fixed to the end of the slide arm 13 mentioned above via the support member 21. A shaft 24 is rotatably supported within the case 22 by a bearing 23. A pinion 25 is fixed to the shaft 24. On the other hand, the case 22 has a cylindrical hole 22a.
A cylindrical rack 26 that engages with the pinion 25 is slidably housed in the hole 22a. A pair of air cylinders 27 are housed in the hole 22a so as to sandwich the rack 26 therebetween, and both ends of the rack 26 are fixed to piston portions (not shown) of each air cylinder 27. Above shaft 2
4 protrudes from the case 22, and a rotating plate 28 is fixed to this lower end. The above-mentioned work holding parts 14a, 14 are attached to this rotary plate 28.
The substrate 15 of b is fixed. By the operation of the air cylinder 27, the work holding parts 14a and 14b are rotated through the meshing action of the rack 26 and the pinion 25.

Further, a transfer device 10b is installed in the gap 2 between each press machine 1A, 1B. This transfer device 10
As shown in FIGS. 7 and 8, b includes a pair of movable tables (first and second mounting sections) 36, 36. This movable table 36 is adapted to perform operations described below by means of a drive mechanism 30. Drive mechanism 30
has a support 31, and a long guide body 32 extending horizontally is fixed to the upper end of the support 31. A pair of carriages 33 are supported by the guide body 32 so as to be movable in the horizontal direction.
That is, the guide body 32 is formed with a projection 32a extending in the longitudinal direction. Further, four rollers 33a are rotatably provided on the traveling platform 33, and the guide body 32 is disposed between these rollers 33a.
The protrusion 32a is inserted.

One end portion of a support arm 34 is rotatably connected to each carriage 33 . The other ends of the pair of support arms 34 are connected to each other by a connecting link 35. The above-mentioned movable table 36 is fixed to each support arm 34 in parallel with the support arm 34 . Each movable table 36 has a workpiece support surface 36a, 36b, respectively. When each moving table 36 is in a horizontal state, one workpiece support surface 36a is in a first support position close to the press machine 1A of the previous process, and the other workpiece support surface 36b is close to the press machine 1B of the next process. in the second supporting position. Each workpiece support surface 36a, 36b is provided with a suction cup (not shown), and the workpiece is supported by this suction cup. still,
In FIGS. 1 to 3, in order to simplify the drawings, only the workpiece support surfaces 36a and 36b are shown, and the drive mechanism 30 is omitted.

A pair of support shafts 38 are rotatably supported by the support column 31, and one end portion of a rotation link 39 is fixed to these support shafts 38. The other end portions of these rotation links 39 are rotatably connected to intermediate portions of the support arm 34, respectively. Further, the pair of support shafts 38 are connected to a pair of gears 4 that mesh with each other.
It is designed to be linked by 0.

A driving link 41 is fixed to one of the support shafts 38, and a tip end of a rod 42a of an air cylinder 42 is rotatably connected to this driving link 41. When the air cylinder 42 contracts and the drive link 41 rotates clockwise in FIG. 8, this rotational force is transmitted to the rotation link 39 via each support shaft 38. As a result, each rotation link 39
rotates as shown by the arrow in FIG.
The horizontal state shown in FIGS. 7 and 8 changes to the vertical state shown by the imaginary line in FIG. 8, and the moving table 36 also changes from the horizontal state to the vertical state. Next, when the air cylinder 42 is extended and the driving link 41 is rotated in the opposite direction, the movable table 36 returns from the vertical state to the normal horizontal state.

The operation of the press processing apparatus having the above configuration will be explained in detail. When pressing is performed by lowering the upper mold 5 of the press machine 1B, the workpiece feeding mechanism 10 is configured as shown in FIG. 3. That is, the slide arm 13 is resting at approximately the center of the press 1B, and the pair of workpiece holding parts 14a and 14b are rotating away from the upper die 5 of the press 1B.

After the press processing of press machine 1B is completed, the first
As shown in the figure, while moving the slide arm 13 to the left in the figure,
In the process of movement, the pair of workpiece holding parts 14a and 14b are rotated by the turning mechanism 20 to open outward. Incidentally, the movement of the slide arm 13 and the rotation of the work holding parts 14a and 14b may be started in the process of the upper mold 5 being raised, as shown in FIG.

Next, by moving the guide body 12 downward, the first workpiece holding part 14a on the left side moves from the first workpiece holding part 36a of the press machine 1A in the previous process to the second workpiece holding part 36a of the press machine 1B in the next process. The workpiece transferred to the storage section 36 is sucked, and the workpiece of the press machine 1B is sucked by the second workpiece holding section 14b on the right side.

Next, after raising the guide body 12 and lifting the workpiece, the slide arm 13 is moved to the right as shown in FIG.
while lowering each work holding section 14a, 14.
Release the workpiece suction state caused by b. As a result, the work carried by the work holding part 14a on the left side is placed on the work placement surface 3 of the press machine 1B, and the work carried by the work holding part 14b on the right side is placed on the work mounting surface 3 of the press machine 1B. It is placed on the third placing section 36 on the right side. In addition, the press machine 1 of the previous process
A workpiece is carried and placed on the workpiece placement surface 3 of A by a conveyance device (not shown) located on the left side.

As mentioned above, the work is transferred to each press machine 1A,
The first and second transfer devices 10b between 1B and 1C
Each press machine 1A, 1
B, and since the movement stroke of the slide arm 13 is shorter than that of the conventional method, the time for transporting the workpiece can be shortened. Moreover, as will be described later, the transfer device 10b transfers a workpiece from one movable table 36 to the other movable table 36, for example, during press processing by the press machines 1A and 1B. Therefore, the downtime of the presses 1A, 1B does not become longer due to the transfer of the workpiece from one movable table 36 to the other movable table 36. Therefore, slide arm 13
The machining efficiency of the press machines 1A and 1B can be improved by the amount of time required to convey the work by shortening the movement stroke of the press machines 1A and 1B.

Next, the guide body 12 is raised and the slide arm 13 is returned to the central rest position as shown in FIG. During the movement of the slide arm 13, the rotating device 20 is driven to rotate the pair of workpiece holders 14a and 14b to move them away from the upper mold 5 of the press machine 1B.

Next, the upper die 5 of the press machine 1B is operated to perform press working. During this press working, assuming that the workpiece holding parts 14a, 14b remain open inward and do not rotate, each workpiece holding part 14a, 14b
As shown by the imaginary line in FIG. Therefore, some of them interfere with the lowering upper mold 5. but,
Actually, the work holding parts 14a and 14b rotate away from the upper die 5 of the press 1B as shown by the solid line, so they do not interfere with the upper die 5.

As shown in FIG. 4, the above-mentioned lowering of the upper mold 5 starts during the horizontal movement of the slide arm 13 and the rotation of the work holding parts 14a and 14b.

During press working by the press machines 1A and 1B, the transfer device 10b performs the operations shown in FIGS. 5a to 5c. That is, before press working, the movable table 36 is in a horizontal state as shown in FIG.
The workpiece X carried from the press machine 1A in the previous process is placed and sucked by the workpiece holding section 14a on the left side. Then, when the above-mentioned press working is started, the air cylinder 42 is
By retracting, each moving platform 36 is placed in the vertical position shown in FIG. 5b. In the state shown in FIG. 5b, the pair of moving tables 36 are close to each other, and in this state, the workpiece Transfer to. After this, air cylinder 4
2, each moving platform 36 is returned to a horizontal state as shown in FIG. 5c. As a result, the workpiece X is turned over and the press machine 1 in the previous process
The press machine 1 for the next process is moved from the moving table 36 close to A.
It is transferred to a moving table 36 close to B. As is clear from this content, the pair of moving tables 36, 36 and the drive mechanism 30 constitute a transfer means. Note that the operating time period of this drive mechanism 30 is the fourth
As shown in the figure, the operating time period is the same as the operating time period of the presses 1A and 1B, but it can be arbitrarily selected within a range that does not overlap with the workpiece conveyance time period by the workpiece holding sections 14a and 14b.

That is, as shown in FIGS. 1 and 2, as the slide arm 13 moves left and right, one of the workpiece holding parts 14a moves to become the second mounting part located on the left side of the press 1B. The workpiece placed on the workpiece support surface 36b of the stand 36 is transferred to the press machine 1B, and the other workpiece holding section 14b is moved to the press machine 1B.
The workpiece placed on the press machine 1B is transferred to the workpiece support surface 36A of the movable table 36, which is the third mounting section located on the right side of the press machine 1B. At this time, the workpiece holding parts 14a and 14b are inwardly facing each other,
Transport the work as described above. Next, during press processing, as shown in FIG. 3, the slide arm 13 is located at the center of the press machine 1B, and the work holding parts 14a and 14b mutually pivot outward.
Avoid interference with the upper mold 5.

(Effects of the invention) As explained above, according to the invention, in order to transport the workpiece from the first mounting section to the second mounting section using the transfer device, the slide arm is moved by the distance corresponding to this transfer distance. The travel stroke can be shortened. Moreover, since the workpiece is transferred from the first mounting section to the second mounting section while the press machine is in operation, the time taken to transfer the workpiece by the transfer device may affect the operating efficiency of the press machine. There is no Therefore, the workpiece transport time can be shortened by the amount that the stroke of the slide arm is shortened. Since it is placed integrally with the press machine behind the processing section of the press machine, there is no need for installation work or centering work when installing it outside the press machine separately from the press machine, etc. In addition, as the work holding part rotates, it retreats from the interference area of the press machine, so there is no need to widen the gap between the press machines more than necessary, and from this point of view, the movement stroke of the slide arm can be shortened. be able to.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIGS. 1 to 3 are schematic plan views explaining the operation of the feeding mechanism in order, FIG. 4 is a time chart, and FIG.
Figures a to c are schematic front views illustrating the step-by-step process of reversing the workpiece using the moving table, Figure 6 is an enlarged sectional view showing the workpiece holding part and its turning mechanism, and Figure 7 is the moving table and drive A plan view of the mechanism, and FIG. 8 is a front view thereof. 1A, 1B, 1C...Press machine, 2...Gap,
10...Work feeding mechanism, 10a...Transport device,
10b... Transfer device, 11... Body frame, 1
2... Guide body, 13... Slide arm, 14
a, 14b...first and second work holding parts, 20
... Rotating mechanism, 30 ... Drive mechanism, 36 ... Moving table (first, second, third mounting table), X ... Workpiece.

Claims (1)

[Scope of utility model registration request] In the workpiece feeding mechanism that transports workpieces from the previous process to the next process to multiple adjacent press machines one after another,
a first mounting section disposed at a position close to the previous process press machine between the previous process press machine and the first next process press machine;
a second mounting section disposed at a position close to the first next-process press machine between the first next-process press machine and the second next-process press machine that is further subsequent to the first next-process press machine; A third press machine located at a position close to the press machine of the first next process between the press machine of
a transfer device having a transfer unit for transferring a workpiece placed on the first placement unit to a second placement unit; a guide body attached to a main body frame so as to be movable up and down; A slide arm is supported by a guide body so as to be movable in the horizontal direction, and the slide arm is provided at one end of the slide arm. A first holding part that holds the workpiece and transports it to the first next-process press machine, which is provided at the other end of the slide arm, and is moved along with the vertical movement of the guide body and the horizontal movement of the slide arm. , a second holding part that holds the workpiece on the press machine for the first next step and transports it to the third loading part, and each end of the slide arm and the first and second workpieces. Each of the first and second workpiece holding parts is provided between the workpiece holding part and the second workpiece holding part, and has a turning mechanism that enables rotational displacement of the first and second workpiece holding parts. A workpiece feeding mechanism for press processing, characterized by comprising a conveyance device installed behind the processing section of each press machine.