JPH07155848A - Press apparatus - Google Patents

Abstract

PURPOSE:To enhance the reliability of a mechanism for rotating a rotary cam and to eliminate defective rotation or the like. CONSTITUTION:In a press apparatus 50, a shift bend is worked on the end of a planar material by engaging the shift bend blade 58x of a working cam 58, which is moved horizontally linked with the movement of an upper die 60, with the shift bend part 54f of a rotary cam 54 in a state that the rotary cam 54 attached to a lower die 52 is rotated to a prescribed position. Cam mechanisms 62, 54a, 54c are provided between the upper die 60 and the rotary cam 54 of the lower die 52; and by the operation of the cam mechanisms 62, 54a, 54c, the rotary cam 54 is rotated to the prescribed position at a prescribed timing linked with the movement of the upper die 60. Consequently, the reliability is high, and defective operation and the like are hardly generated compared with a method in which the rotary cam 54 is rotated by a air cylinder, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press device for bending and bending the ends of a plate-shaped material.

[0002]

2. Description of the Related Art A conventional press device relating to this is described in Japanese Patent Laid-Open No. 59-197318. As shown in FIG. 13, the press device 1 includes a lower mold 2, and a support surface 2s for supporting the plate-shaped material w from below is formed at a predetermined upper position of the lower mold 2. Further, a cam groove 2m having an arcuate surface is formed substantially horizontally at the center of the upper part of the lower mold 2, and the rotary cam 4 is housed in the cam groove 2m so as to be rotatable. The rotary cam 4 is housed in a close contact with the cam groove 2m, and an L groove 4n having a substantially L-shaped cross section is formed in the axial direction from the outer side surface to the center. The L groove 4 is formed on the outer surface of the rotary cam 4.
An end surface 4t that supports the panel w from below together with the support surface 2s of the lower mold 2 is formed in the vicinity of n. In addition, the rotary cam 4 is provided with a bending portion 4f which forms a side wall surface of the L groove 4n at a predetermined angle with the end surface 4t. Further, the L groove 4n functions as a rotation stopper of the rotating cam 4 in the clockwise direction in the drawing at a position facing the approaching bent portion 4f, and guides a processing cam 8 described later into the L groove 4n. The slide plate 4b is fixed.

The holding surface 2s of the lower mold 2 and the rotary cam 4
A pad 6 attached to the upper die holder 7 via a spring is disposed above the end surface 4t of the lower die 2 and the pad 6 is lowered by lowering the upper die holder 7 and the supporting surface 2s of the lower die 2. The end surface 4t of the rotary cam 4 can be brought into surface contact. As a result, the plate-shaped material w can be positioned between the pad 6 and the support surface 2s of the lower die 2 and the end surface 4t of the rotary cam 4. Further, above the slide plate 4b of the rotary cam 4, a suspension cam 8 (working cam 8) mounted on the upper die holder 7 in a state in which it is allowed to move in the lateral direction is arranged. The lower surface 8d of the processing cam 8 can come into surface contact with the slide plate 4b, and a tip end of the processing cam 8 is provided with a bending blade 8x that engages with the bending portion 4f of the rotary cam 4. Has been formed.

The bending of the end portion of the panel w using the pressing device 1 is performed in the following procedure. Lower mold 2
When the panel w is set on the support surface 2s formed on the upper surface, the upper die holder 7 starts to descend, and in the descending process, first, the lower surface 8d of the processing cam 8 moves the slide plate 4b of the rotary cam 4 downward. It is pushed down and the rotary cam 4 is rotated rightward in the figure.
When the slide plate 4b comes into contact with the wall surface 2w of the lower mold 2, the rotation of the rotary cam stops, and the end surface 4t of the rotary cam 4 is stopped.
Is a surface continuous with the supporting surface 2s of the lower mold 2, and its end surface 4t supports the plate-shaped material w from below together with the supporting surface 2s. In this state, next, the pad 6 comes into contact with the plate-shaped material w, and the plate-shaped material w is sandwiched between the pad 6 and the support surface 2s of the lower mold 2 and positioned at that position. When the upper die holder is further lowered from this state, the machining cam 8 moves obliquely downward following the slide plate 4b while the pad 6 is held at that position, and the shifting bending blade 8x of the machining cam 8 causes the rotary cam 4 to move. The plate-shaped material w
The ends of the are bent and bent.

[0005]

However, according to the above-described conventional pressing device 1, the rotary cam 4 is structured to be rotated by the lower surface 8d of the processing cam 8 pushing down the slide plate 4b. . Therefore, when the plurality of rotary cams 4 are arranged in the axial direction, it is very difficult to rotate the rotary cams 4 at different timings. Further, the press device 20 shown in FIG. 14 is a lower type press device in which the processing cam 28 is arranged on the lower die 22. The pressing apparatus 20 further includes the upper die 27 in a state where the inclined lower surface 29d of the fixed cam 29 attached to the upper die 27 is in surface contact with the inclined upper surface 28u of the processing cam 28.
Is moved down, the machining cam 28 traverses to a position where it engages with the rotary cam 24. Here, the rotation of the rotary cam 24 is performed by an air cylinder (not shown) before the processing cam 28 traverses. In the press device 20, the rotation of the rotary cam 24 is performed by the air cylinder at a predetermined timing. Therefore, when the plurality of rotary cams 4 are arranged in parallel, the rotary cams 4 are rotated at different timings. It is also easy to do. However, if the air cylinder malfunctions or the operation timing is deviated during the pressing, the processing cam 28 is not rotated to the specified position.
Will be rampant. As a result, the close bending blade 28x of the processing cam 28 and the close bent portion 14f of the rotary cam 14 are not smoothly engaged with each other, and the press device 20 may be damaged. The technical problem of the present invention is to enable a plurality of or a single rotating cam to reliably rotate to a specified position at a predetermined timing in conjunction with the upper mold,
The present invention is intended to prevent damage to the press device due to defective rotation of the rotary cam.

[0006]

The above-mentioned problems can be solved by a pressing device having the following features. That is, in the pressing device according to the present invention, the rotating cam mounted on the lower die is rotated to the specified position, and is moved laterally in association with the movement of the upper die with respect to the approaching bending portion of the rotating cam. In the press device for engaging and bending the edge of the plate-shaped material by engaging the moving and bending blades of the processing cam that is moved, a cam mechanism is provided between the upper die and the lower cam of the lower die. Due to the operation of the cam mechanism, the rotary cam rotates at a predetermined timing in conjunction with the movement of the upper die to a specified position.

[0007]

According to the present invention, the cam mechanism works to rotate the rotary cam in conjunction with the movement of the upper die. Therefore, as compared with the conventional method in which the rotary cam is rotated by an air cylinder or the like, the reliability is higher and the malfunction is less likely to occur. Further, by changing the guide shape of the cam of the cam mechanism to a shape according to the situation, it is possible to set the rotation timing and the rotation angle of the rotary cam with respect to the movement of the upper die to desired conditions. Further, even when a plurality of rotary cams are installed, each rotary cam can be rotated at a predetermined timing by providing the cam mechanism according to the number of rotary cams.

[0008]

【Example】

[First Embodiment] A press device 50 according to a first embodiment of the present invention will be described below with reference to FIGS. Here, FIG. 1 is a side view of a main part of the press device 50 according to the present embodiment when the press is completed, and FIGS. 2 to 6 are side views of the main part of the press device 50 during the press. The press device 50 includes a lower mold 52.
A support surface 52s that supports the panel w (plate-shaped material) from below is formed at a predetermined position above the. Further, a cam groove 52m having an arcuate surface is formed substantially horizontally on the upper left side of the lower mold 52, and the rotary cam 54 is housed in the cam groove 52m so as to be rotatable.

The rotary cam 54 has a cam groove 5 of the lower die 52.
It is stored in a close contact state with 2 m, and a U groove 54u having a substantially U-shaped cross section is formed in the axial direction from the outer surface to the center. Then, the U groove 54 is formed on the outer surface of the rotary cam 54.
An end surface 54t that supports the panel w from below together with the support surface 52s of the lower mold 52 is formed near u. Further, the rotary cam 54 has a U on the back side of the end surface 54t.
A bending portion 54f is provided so as to form a side wall surface of the groove 54u. Further, the U groove 54u functions as a rotation stopper of the rotating cam 54 in the clockwise direction in the drawing at a position facing the approaching bent portion 54f, and guides a processing cam 58 described later into the U groove 54u. The slide plate 54b (see FIG. 2) is fixed. A base end of an arm 54a protruding in the radial direction of the rotary cam 54 is fixed to the center of the end surface of the rotary cam 54, and a roller-like cam follower 54 is attached to the tip of the arm 54a.
c is attached.

Above the lower mold 52, an upper mold holder 60 connected to an elevator (not shown) is arranged, and on the outer surface of the upper mold holder 60, as shown in FIG. A plate-shaped driver cam 62 having an inclined surface 62f with an inclination and a vertical surface 62e is vertically fixed.
Then, together with the upper die holder 60, a driver cam 62
As shown in FIG. 2 and FIG.
The inclined surface 62f of the driver cam 62 contacts the cam follower 54c of the arm 54a fixed to the rotating cam 54,
The arm 54a is pushed down. As a result, the rotary cam 54 and the arm 54a are rotated clockwise in the figure, and the cam follower 54c attached to the arm 54a moves following the inclined surface 62f of the driver cam 62. Then, the cam follower 54c is provided with the inclined surface 6
At the stage of shifting from 2f to the vertical surface 62e, the driver cam 62 cannot push down the arm 54a, as shown in FIG.
The rotation of a stops. At this time, the slide plate 54b of the rotary cam 54 contacts the upper surface 52j of the lower die 52, and the end surface 54t of the rotary cam 54 becomes a surface continuous with the support surface 52s of the lower die 52. From this state, the upper die holder 60 further descends, but the cam follower 54c of the rotary cam 54 moves following the vertical surface 62e of the driver cam 62, so that the rotary cam 54 does not rotate but its position. Held in. That is, the driver cam 62, the arm 54a, and the cam follower 54c correspond to a cam mechanism that rotates the rotary cam 54 in conjunction with the lowering of the upper die holder 60. After the pressing is completed and the upper die holder 60 is raised, the rotary cam 54 is returned to the standby position by the air cylinder 55.

On the upper surface 52j of the lower die 52, a processing cam 58 is placed in a state in which it is allowed to move in the horizontal direction in the drawing. The machining cam 58 traverses to the left with the slide plate 54b of the rotary cam 54 in contact with the upper surface 52j of the lower die 52, so that the tip (the left end in the drawing) of the machining cam 58 has a U groove 54u of the rotary cam 54. Is designed to be inserted into
A bending blade 58x that engages with the bending portion 54f of the rotary cam 54 is attached to the upper end of the tip. Further, an inclined upper surface 58u is formed on the rear portion (right end in the figure) of the processing cam 58, and the upper die holder 6 is attached to the inclined upper surface 58u.
The inclined lower surface 68d of the fixed cam 68 fixed to 0 can come into surface contact. With this structure, the processing cam 5
When the upper die holder 60 is further lowered in a state where the inclined lower surface 68d of the fixed cam 68 is in surface contact with the inclined upper surface 58u of No. 8, the processing cam 58 traverses to the left by the sliding action of the inclined upper surface 58u and the inclined lower surface 68d. Then, the approach bending blade 58x of the processing cam 58 engages with the approach bending portion 54f of the rotary cam 54.

Further, a pad 66 is attached to the upper die holder 60 in a state in which the upper die holder 60 is allowed to move in the vertical direction. The pad 66 is attached to the upper die holder 60 via a suspension rod (not shown), and the pad 66 is attached around the suspension rod.
A spring (not shown) is attached which is biased in a direction of separating the upper mold holder 60 from the upper mold holder 60. As a result, when the upper die holder 60 descends to a predetermined position, the pad 66 comes into surface contact with the support surface 52s of the lower die 52 and the end surface 54t of the rotary cam 54. Then, the support surface 52s of the lower die 52 and the end surface 54t of the rotary cam 54.
With the panel w set on the pad 66,
When the panel w comes into surface contact with the panel w, the panel w is applied to the pad 66 and the support surface 52 by a force corresponding to the spring force of the spring.
It is sandwiched between s and the end surface 54t and positioned at that position.

Next, the operation of the press machine according to this embodiment will be described. First, with the upper die holder 60 at the upper limit position, the panel w is placed on the support surface 52s formed on the lower die 52.
When is set, the lifting device (not shown) is driven and the upper die holder 60 starts lowering. When the upper die holder 60 starts descending, as shown in FIG.
The inclined surface 62f of the driver cam 62 fixed to the upper die holder 60 contacts the cam follower 54c attached to the arm 54a of the rotary cam 54. In this state,
When the upper die holder 60 and the driver cam 62 descend, the driver cam 62 pushes down the arm 54a in the process of the cam follower 54c following the inclined surface 62f of the driver cam 62 as shown in FIG. The cam 14 and the arm 54a are rotated clockwise in the drawing. Then, as shown in FIG. 4, when the cam follower 54c moves from the inclined surface 62f of the driver cam 62 to the vertical surface 62e, the slide plate 54b of the rotary cam 54 contacts the upper surface 52j of the lower mold 52, The rotation of the rotary cam 54 stops. As a result, the rotary cam 5
The end surface 54t of No. 4 is a surface continuous with the support surface 52s of the lower die 52, and the panel w is the end surface 54t of the rotating cam 54 and the lower die 5.
It is supported from below by the two support surfaces 52s.

Further, when the pad 66 contacts the panel w while the upper die holder 60 continues to descend, the panel w is moved by the pad 66, the support surface 52s of the lower die 52 and the end surface 54t of the rotary cam 54. It is sandwiched and positioned at that position. Also, at almost the same timing,
Inclined lower surface 6 of fixed cam 68 fixed to upper die holder 60
8d makes surface contact with the inclined upper surface 58u of the processing cam 58. Then, when the upper die holder 60 further descends from this state, the fixed cam 68 descends while the pad 66 is held at that position, and the inclined lower surface 68d thereof.
And the slidable upper surface 58u of the processing cam 58,
The processing cam 58 traverses the lower mold 52 to the left. Then, as shown in FIG. 5, the distal end portion of the processing cam 58 is housed in the U groove 54u of the rotary cam 54, and
8 of the rotary bending blade 58x of the rotary cam 54
The panel w is bent and bent while being engaged with f.
When the bending process is completed in this way, as shown in FIG. 6, the upper die holder 60 is raised and the processing cam 58 and the rotating cam 54 are returned to the standby position.

As described above, the press device 50 according to the present embodiment.
According to the above, the driver cam 62, the arm 54a and the cam follower 5 are provided between the upper die holder 60 and the rotary cam 54.
A cam mechanism composed of 4c is provided. Therefore, as compared with the conventional method of rotating the rotary cam 54 with an air cylinder or the like, the reliability is higher and the malfunction is less likely to occur. As a result, the close bending portion 54f of the rotary cam 54 and the close bending blade 58x of the processing cam 58 are smoothly engaged with each other, and the press device 50 is prevented from being damaged. Further, by changing the guide shape of the driver cam 62 to a shape according to the situation, the rotation timing and the rotation angle of the rotary cam 54 with respect to the lowering of the upper die holder 60 can be set to desired conditions. Further, even when a plurality of rotary cams 54 are installed in parallel in the press device 50, by providing a cam mechanism according to the number of the rotary cams 54, each rotary cam 54 can be installed.
Can be rotated at predetermined timings.

[Second Embodiment] FIGS. 7 to 12 show a pressing apparatus according to a second embodiment of the present invention. As shown in FIG. 8, the press device 70 according to the present embodiment has three rotary cams (first rotary cam 174, second rotary cam 274, third rotary cam 174, and third rotary cam 174 arranged in parallel at a predetermined angle in the horizontal direction. And a rotary cam 374) for each rotary cam 1
74, 274 and 374 are adapted to be rotated at a predetermined timing. Here, FIG. 7 and FIG.
12A to 12A are VII-VII arrow views of FIG. 8, that is, the press device 70 viewed from the direction of the first rotating cam 174.
FIG. 9 is a side view of FIG. 9 and FIG.
2B shows a side view of the pressing device 70 at the position of the second rotating cam 274, that is, a view taken along the line IX-IX in FIG. In addition, the first rotation cam 174 and the third rotation cam 374.
Since they have the same structure and are rotated at the same timing, the first rotating cam 174 will be described as a representative.

The first rotating cam 174 has a cam groove 72m of the lower mold 72, as in the pressing device 50 according to the first embodiment.
The U groove 174u having a substantially U-shaped cross section is formed in the axial direction from the outer side surface to the center. An end surface 174t that supports the panel w from below together with the support surface 72s of the lower mold 72 is formed near the U groove 174u on the outer surface of the first rotary cam 174. In addition, the first rotary cam 174 includes the end surface 17
A bending portion 174f is provided on the back side of 4t so as to form the side wall surface of the U groove 174u. Further, in the U-groove 174u, at a position facing the bending portion 174f,
A slide plate 174b that serves as a rotation stopper of the first rotation cam 174 in the clockwise direction in the drawing and guides a processing cam 78 described later into the U groove 174u is fixed. Further, in the center of the end face of the first rotating cam 174,
The arm 1 protruding in the radial direction of the first rotary cam 174.
The base end of 74a is fixed and its arm 174a
A roller-shaped cam follower 174c is attached to the tip of the.

Also, on the outer surface of the upper die holder 80,
A driver cam 82 having an inclined surface 82f having a predetermined inclination and a vertical surface 82e is vertically fixed. Then, as the driver cam 82 descends together with the upper die holder 80, the inclined surface 82f of the driver cam 82 moves to the first position.
The arm 174a fixed to the rotating cam 174 comes into contact with the cam follower 174c, and the arm 174a is pushed down. As a result, the first rotary cam 174 and the arm 174a are rotated clockwise in the figure, and the cam follower 174c attached to the arm 174a moves following the inclined surface 82f of the driver cam 82. Then, when the cam follower 174c moves from the inclined surface 82f to the vertical surface 82e, the driver cam 82 cannot push down the arm 174a as shown in FIG. 10, and the first rotating cam 174 and the arm 174 are not able to be pushed down.
The rotation of a stops. At this time, the first rotating cam 17
The slide plate 174b of No. 4 abuts on the upper surface 72j of the lower die 72, and the end surface 174t of the first rotating cam 174 of the lower die 72 is in contact with the lower die 72.
The surface is continuous with the supporting surface 72s. After the pressing is finished and the upper die holder 80 is raised, the first rotary cam 174 is returned to the standby position by the air cylinder 75.

As shown in FIG. 9, the second rotating cam 274 is housed in the cam groove 72m of the lower die 72 in a close contact state, like the first rotating cam 174, and from the outer side surface thereof. A U groove 274u having a substantially U-shaped cross section is formed in the axial direction toward the center. The support surface 7 of the lower mold 72 is provided on the outer surface of the second rotary cam 274 in the vicinity of the U groove 274u.
An end surface 274t that supports the panel w from below is formed together with 2s. Further, the second rotating cam 274 is provided with a bending portion 274f which constitutes a side wall surface of the U groove 274u on the back side of the end surface 274t. Further, the U groove 274u functions as a rotation stopper in the clockwise direction of the second rotating cam 274 at a position facing the bending portion 274f and guides the processing cam 78 into the U groove 274u. The slide plate 274b is fixed. A second spring 72y is attached between the slide plate 274b and the lower mold 72 and is biased to hold the second rotary cam 274 at the standby position.
The end surface 274t of the second rotary cam 274 is a surface continuous with the support surface 72s of the lower die 72 in a state where the slide plate 274b is in contact with the upper surface 72j of the lower die 72.

As shown in FIG. 7, a fixed cam 88 is fixed to the upper die holder 80 at a predetermined position, and a machining cam 78 is connected to the fixed cam 88. The processing cam 78 has an inclined upper surface 78u that comes into surface contact with the inclined lower surface 88d of the fixed cam 88, and has a horizontal surface 78f (see FIG. 10) at its lower end. Further, at the tip of the processing cam 78, the first rotary cam 174 and the second rotary cam 174 are provided.
A bending blade 78x that engages with the bending portions 174f, 274f, 374f provided on the rotary cam 274 and the third rotary cam 374, respectively, is formed. With this structure, the slide plates 174b, 274b, 374b, which are the rotation stoppers of the rotary cams 174, 274, 374, respectively.
Is in contact with the upper surface 72j of the lower die 72, the processing cam 7
The horizontal plane 78f of 8 is the slide plates 174b, 274b, 3
When the upper die holder 80 descends from this state, the inclined upper surface 78u of the processing cam 78 and the inclined lower surface 88d of the fixed cam 88 cause the processing cam 78 to slide on the slide plate 174b. 274b and 374b are traversed to the left in the figure, and the bending cam 7 of the machining cam 78 is moved.
8x engages with the bending and bending portions 174f, 274f, and 374f of the rotary cams 174, 274, and 374, respectively.

Next, the operation of the press machine according to this embodiment will be described. First, with the upper die holder 80 at the upper limit position, the panel w is placed on the support surface 72s formed on the lower die 72.
When is set, the lifting device (not shown) is driven and the upper die holder 80 starts lowering. When the upper die holder 80 starts descending, first, the inclined surface 82f of the driver cam 82 fixed to the upper die holder 80 is attached to the arm 174a of the first rotary cam 174.
Abut on 74c. At the same time, the inclined surface of another driver cam (not shown) fixed to the upper die holder 80 comes into contact with the cam follower (not shown) of the third rotation cam 374. In this state, when the upper die holder 80 and the driver cam 82 are further lowered, the driver cam 82 pushes down the arm 174a while the cam follower 174c moves following the inclined surface 82f of the driver cam 82, and the first rotation cam 174 and the third rotation cam 374 (not shown) are rotated clockwise in the drawing. Then, as shown in FIG. 10A, at the stage where the cam follower 174c moves from the inclined surface 82f of the driver cam 82 to the vertical surface 82e, the first rotating cam 174 is moved.
The slide plate 174b comes into contact with the upper surface 72j of the lower die 72, and the rotation of the rotary cam 54 is stopped. Similarly, the third
The rotation of the rotation cam 374 is also stopped. By this, the first
The end surface 174t of the rotating cam 174 and the third rotating cam 374.
End surface (not shown) of the lower mold 72 is a support surface 72s
Is a continuous surface, and the panel w has both rotary cams 174, 3
It is supported from below by the end surface 174t of 74 and the support surface 72s of the lower mold 72.

Further, as the upper die holder 80 continues to descend, as shown in FIGS. 10 (B) and 11 (B), the horizontal plane 78f of the machining cam 78 is moved to the second rotary cam 2 as shown in FIG.
By pushing down the slide plate 274b of 74, the second rotating cam 274 is rotated clockwise in the figure against the spring force of the second spring 72y. Then, the second rotating cam 2
When the slide plate 274b of 74 abuts on the upper surface 72j of the lower mold 72, the rotation of the second rotary cam 54 is stopped, and the end surface 274t of the second rotary cam 274 becomes the supporting surface 7 of the lower mold 72.
It becomes a continuous surface for 2 seconds.

Next, when the pad 86 comes into contact with the panel w in the process of the lowering of the upper die holder 80, the panel w causes the pad 86, the supporting surface 72s of the lower die 72, and the rotary cams 174, 274 of each. , 374 end face 174
It is sandwiched by t, 274t, and 374t and positioned at that position. Further, in this state, the horizontal surface 78f of the processing cam 78 is moved to the rotary cams 174, 274, 374.
Surface contact with the slide plates 174b, 274b, 374b. Then, as shown in FIG. 12, by further lowering the upper die holder 80 from this position, the processing cam 7
The slanted upper surface 78u of the fixed cam 88 and the slanted lower surface 88d of the fixed cam 88 cause the working cam 78 to slide on the slide plate 174.
Cross over b, 274b, 374b to the left in the figure. Then, the approach bending blades 78x of the processing cam 78 are moved toward the approach bending portions 174f, 2 of the respective rotary cams 174, 274, 374.
The panel w is bent and bent while engaging with 74f and 374f. As described above, the pressing device 7 according to the present embodiment
0 means that even when a plurality of rotary cams 174, 274, 374 are installed side by side, the respective rotary cams 174, 274,
The 374 can be rotated at a predetermined timing.

[0024]

According to the present invention, the function of the cam mechanism is such that the rotary cam rotates in conjunction with the movement of the upper die. Therefore, the reliability is high and malfunctions are unlikely to occur.
Therefore, damage to the pressing device due to poor rotation of the rotary cam is prevented.

[Brief description of drawings]

FIG. 1 is a side view of a main portion of a pressing device according to a first embodiment of the present invention.

FIG. 2 is a side view of the main part of the pressing device according to the first embodiment of the present invention during pressing.

FIG. 3 is a side view of the main part of the pressing device according to the first embodiment of the present invention during pressing.

FIG. 4 is a side view of the main part of the pressing device according to the first embodiment of the present invention during pressing.

FIG. 5 is a side view of the main part of the pressing device according to the first embodiment of the present invention during pressing.

FIG. 6 is a side view of the essential parts of the pressing device according to the first embodiment of the present invention at the end of pressing.

FIG. 7 is a side view of the main parts of the pressing device according to the second embodiment of the present invention.

FIG. 8 is a plan view of a main portion of a press device according to a second embodiment of the present invention.

9 is a view taken along the line IX-IX in FIG.

FIG. 10 is a side view of the main part of the pressing device according to the second embodiment of the present invention during pressing.

FIG. 11 is a side view of the main part of the pressing device according to the second embodiment of the present invention during pressing.

FIG. 12 is a side view of the main part of the pressing device according to the second embodiment of the present invention during pressing.

FIG. 13 is a side view of a main part of a conventional pressing device.

FIG. 14 is a side view of a main part of a conventional pressing device.

[Explanation of symbols]

 w Panel (plate-shaped material) 50 Press device 52 Lower mold 54 Rotating cam 54a Arm (cam mechanism) 54c Cam follower (cam mechanism) 54f Shift bending part 58 Processing cam 58x Shift bending blade 60 Upper die holder 62 Driver cam (cam mechanism) 66 pad 68 fixed cam

Claims (1)

[Claims] 1. A machining cam that is moved laterally in association with the movement of the upper die with respect to the approaching and bending portion of the rotary cam mounted on the lower die while being rotated to a specified position. In a press device for engaging and bending an edge of a plate-shaped material by engaging an edge bending blade, a cam mechanism is provided between the upper die and the rotating cam of the lower die. A press device characterized in that the rotating cam is rotated to a prescribed position in conjunction with the movement of the upper die at a predetermined timing by the action of a cam mechanism.