JP2000071028A - Die and die exchange device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To arrange plural stations at an above, bottom tables by freely arranging a desired die wherein a length of a mold is automatically changed. SOLUTION: This die has an engaging part which freely engages, releases the die against a die holder. In a die exchanging device, a die engagement releasing button 39 which switches the engaging part (a die lock pin 37) of the die in an engaging condition or in a released condition, and a die exchange unit 19 being equipped with a holding member to hold a die are installed freely movably in a longitudinal direction, and in upward/downward, forward/backward directions of tables 3, 5. The engaging part of a die furnished to the above, bottom tables 3 is switched to a released condition by the die engagement releasing button 39 of the die exchange unit, and is held by a finger member 53 of the die exchange unit 19. The die exchanging unit 19 is retracted in a mold retracting part of the press device by moving in a upward/downward, forward/backward and longitudinal directions so that a desired die is easily exchanged in the above, bottom tables 3, 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold used in a press machine and a mold changing apparatus.

[0002]

2. Description of the Related Art Conventionally, in a mold exchanging apparatus used for a press apparatus, for example, a plurality of molds laid out manually are stored in a mold storage section on the back side of an upper and lower table.
The plurality of dies are replaced and attached to the upper and lower tables at the time of repeat.

The lengths of a plurality of dies mounted on the upper and lower tables are automatically adjusted by a link-type die changing device in accordance with the length of a product to be processed.

[0004]

In the conventional mold changing apparatus, the length of the mold can be automatically set.
Only one station. Therefore, when the product to be processed requires a multi-station, the molds are manually laid out and stored in the storage section as they are, and the laid-out molds are taken out of the storage section at the time of repetition. There was a problem that the type of mold layout was limited.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and has as its object to automatically change the length of a mold, arbitrarily arrange a desired mold, and move a plurality of stations up and down. An object of the present invention is to provide a mold and a mold changing device that can be arranged on a table.

[0006]

According to a first aspect of the present invention, there is provided a mold having an engaging portion which can be disengaged from a mold holder. An engagement hole into which an engagement / disengagement switching means can be inserted is provided so as to bring the portion into an engaged state or a released state.

Therefore, since the engagement hole is provided in the mold,
The engagement portion of the mold holder is easily engaged or released by the engagement / disengagement switching means by inserting the engagement / release switching means into the engagement hole from any side of the mold.

According to a second aspect of the present invention, there is provided a mold exchanging apparatus in which the engaging portion of the mold is engaged with a mold having an engaging portion capable of being disengaged from the mold holder. Alternatively, a press unit is provided with a mold exchanging unit comprising: an engagement / release switching means for switching to a release state; and a gripping member for gripping the engagement / release switching means inserted into an engagement hole formed in the die. The mold changing unit is provided so as to be movable in the longitudinal direction of the table and in the vertical and longitudinal directions.

Therefore, the mold mounted on the upper and lower tables has its engaging portion switched to the released state by the engagement / disengagement switching means of the mold changing unit, and the mold is held by the gripping member of the mold changing unit. Is grasped. This gripped mold is pressed by the mold exchanging unit moving in one of the up and down directions and being detached from the upper and lower tables. Is stored in the storage unit.

The operation when the mold is mounted on the upper and lower tables is the reverse of the operation when the mold is removed.

When a plurality of split dies are used in combination in accordance with the length of a product to be processed, the selected dies are easily attached to the upper and lower tables from the storage section using a die changing unit. At the same time, unnecessary dies are easily stored in the storage section, so that a plurality of stations corresponding to the product length to be processed can be easily set on the upper and lower tables.

Further, even if a plurality of split dies are mounted on the upper and lower tables with an interval therebetween, the split dies on both ends are moved by using the gripping member of the die changing unit, thereby forming a plurality of split dies. The mold easily adheres to form a station.

According to a third aspect of the present invention, in the mold exchanging apparatus according to the second aspect, the engagement / disengagement switching means of the mold exchanging unit engages the engaging portion of the mold. An engaging claw for switching to a release state is provided, and the engaging claw is provided so as to be insertable into an engaging hole provided in the mold and to be movable in the front-back and up-down directions in the insertion direction. It is a feature.

Therefore, after the mold exchanging unit moves in the longitudinal direction and the front of the upper and lower tables and is positioned at the front surface of the desired mold, the engagement / disengagement switching means moves forward and the engaging claw is moved to the mold. The engaging claw moves up or down and retreats to engage with the engaging portion of the mold, thereby easily switching the mold to the released state.

Further, when the mold is mounted on the upper and lower tables, the state of engagement with the engaging portion of the mold can be switched simply by moving the engaging claw portion forward, so that the mold can be easily engaged. State.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a mold and a mold changing apparatus according to an embodiment of the present invention.

Referring to FIG. 3 to FIG. 5, in the press brake 1 according to the present embodiment, the mold including the punch P and the die D is formed by the mold mounting portions 7, 9 of the upper table 3 and the lower table 5. It is attached to.

As shown in FIG. 3, each of the mold mounting sections 7 and 9 is configured so that a plurality of dies can be combined in accordance with the bending length of the work W to form a plurality of stations. I have. Incidentally, in FIG. 3, three stations S
_A , S _B and S _C are formed.

A mold storage section 11 for storing and storing a plurality of dies is provided substantially at the center in the longitudinal direction of the upper and lower tables 3 and 5 of the press brake 1 as shown in FIG. As shown, a punch storage unit 13 for a plurality of punches P is provided on the back side of the upper table 3, and a die storage unit 15 for a plurality of dies D is provided on the back side of the lower table 5.

Although described later in detail, the mold storage unit 1
In this embodiment, reference numeral 1 denotes a vertically movable unit as shown in FIGS.

The press brake 1 has a mold for attaching and detaching the molds of the mold mounting portions 7 and 9 of the upper and lower tables 3 and 5 and replacing the molds with the mold of the mold storage portion 11 described above. An exchanging device 17 is provided. For example, an upper mold exchanging unit 19 for exchanging a punch P is provided on the upper table 3 so as to be movable on the back side of the upper table 3 in the left-right direction in FIGS. 3 and 4. The lower table 5 is provided with a lower mold exchanging unit 21 for exchanging the punch P so as to be movable on the back side of the lower table 5 in the left-right direction in FIGS.

In order to form a station having a length corresponding to the work W to be machined, the above-described mold changing device 17 is used to store a plurality of dies from the mold storage section 11 into the upper and lower tables 3,5. At the same time, unnecessary dies are attached to the mold storage sections 11 from the upper and lower tables 3 and 5, respectively.

A work W to be bent is positioned between a punch P and a die D at a station, and one of the upper table 3 and the lower table 5 is raised by an elevation drive cylinder (not shown) to move the punch P and the die. The work W is configured to bend in cooperation with D. In addition,
A bending robot 22 that is movable in the X-axis direction is provided at a front portion of the lower table 5, and the configuration and operation of the bending robot 22 are already known, and a detailed description thereof will be omitted.

Next, a mold comprising a punch P and a die D, which are main parts of the present embodiment, will be described with reference to the drawings.

Referring to FIG. 1, for example, an upper receiving member 23 as a mold holder having a mold mounting portion 7 is fixedly clamped to a lower end portion of the upper table 3 using a clamp piece 25. . A mold clamp pin 31 that fits into a groove 29 provided on both sides of the fitting portion 27 on the upper end side of the mold is provided in the mold mounting portion 7 by a biasing means such as a hydraulic cylinder. A mold engaging groove 33 is provided on the inner surface of the mold mounting portion 7 so as to be able to protrude and retract from the wall surface to the inside, and is engageable with a mold lock pin of a mold described later.

Also, referring to FIG.
For example, a lower receiving member 35 as a mold holder having a mold mounting portion 9 having a structure similar to that of the mold mounting portion 7 of the above-described upper receiving member 23 is fixedly clamped at the upper end of the upper receiving member.

It is to be noted that both the punch P and the die D can be mounted on the upper receiving member 23 and the lower receiving member 35. In the present embodiment, the punch P is mounted on the upper table 3 and the lower table 5 is mounted. A description will be given of a state in which the die D is mounted.

Referring to FIG. 1 again, the fitting portion 27 on the upper end side of the punch P is provided so as to be able to be fitted into and removed from the mold mounting portion 7, and the mold engaging groove portion of the upper receiving member 23. 33
For example, a mold lock pin 37 as an example of an engaging portion capable of engaging with the punch P is provided so as to be able to protrude and retract from the side surface of the punch P. The mold lock pin 37 is interlocked with a mold engagement release button 39 protruding from the side of the punch P below the fitting portion 27 of the punch P. When the mold engagement release button 39 is pressed inward, the mold lock pin 37 is locked. When the pin 37 sinks into the side surface of the punch P and the pressing of the mold engagement release button 39 is released, the mold lock pin 37 projects from the side surface of the punch P.

The above-mentioned mold release buttons 39 are provided on both side surfaces of the punch P, and are provided so as to interlock with the above-mentioned mold lock pins 37. The mold lock pins 37 can be provided on both side surfaces of the punch P, and the mold engagement release buttons 39 on both side surfaces are provided with the respective mold lock pins 37.
It may be configured to be linked to any one of the above.

The punch P is provided with an engagement hole 41 at a position below the fitting portion 27, for example, at a position below the die lock pin 37 so as to penetrate both sides of the punch P. Reference numeral 41 denotes an engagement / disengagement switching means provided in the upper mold exchanging unit 19, which will be described later.

As shown in FIG. 2, the die D constituting the mold is provided with a mold lock pin 37, a mold engagement release button 39, and an engagement hole 41 similarly to the punch P described above. Since it has the same structure as the fitting portion 27 of the punch P, detailed description is omitted.

Next, the mold exchanging device 17 which is a main part of the present embodiment will be described with reference to the drawings.

Referring to FIG. 1, the upper mold exchanging unit 19 is arranged such that the upper unit main body 43 extends in the longitudinal direction of the upper table 3 along the left and right linear guides 45 provided on the back surface of the upper table 3 (in FIG. It is provided so as to be movable and positionable in the X-axis direction (lateral direction). The upper unit main body 43 has a pinion 4 which meshes with a rack 47 provided on the upper table 3 as shown in FIG.
For example, a servo motor 51 is provided as X-axis driving means for rotating the pinion 49 via a rotation transmitting means.

FIG. 1 shows a state in which, for example, a finger member 53 as a gripping member and a hook member 55 as an engagement / release switching means are inserted into the engagement hole 41 of the punch P. , Upper mold exchange unit 1
9 travels in the longitudinal direction of the upper table 3, the finger members 53 and the hook members 55 are engaged with the engaging holes 41 of the punch P.
1 or the punch P is gripped by the finger member 53 and the hook member 55 and pulled out of the mold mounting portion 7 and is located on the left side in FIG. It is.

The upper unit main body 43 is provided with a back-and-forth moving support member 57 movably in the front-rear direction (the left-right Y-axis direction in FIG. 1) along the front-rear linear guide 59. 57 is a piston rod 6 of a Y-axis drive cylinder 61 provided on the upper unit main body 43.
3 driven.

A switching cylinder support member 65 is provided on the front-rear movement support member 57 so as to be movable vertically (along the Z axis in FIG. 1) along a vertical linear guide 67. The member 65 is driven by a piston rod 71 of a Z-axis drive cylinder 69 provided on the back-and-forth moving support member 57.

A hook member 55 driven by a hook moving cylinder 73 is provided on the switching cylinder support member 65 so as to be movable in the front-rear direction (the Y-axis direction in FIG. 1). Further, as shown in FIG. 1, the tip of the hook member 55 has a hook 75 as an example of an engaging claw that can be engaged with the above-described mold disengaging button 39 of the punch P or the die D. Are provided rotatably in the vertical direction via hinges 77.
Is provided so as to be able to be inserted into the engagement hole 41 of the mold.

The switching cylinder support member 65 includes a finger member 5 driven by a finger moving cylinder 79.
3 is provided movably in the front-rear direction (the Y-axis direction in the left-right direction in FIG. 1) along the lower surface of the hook member 55, and the top end of the finger member 53 is narrowed toward the front end. An inclined surface 81 is provided in the direction.

Referring to FIG. 2, the lower mold exchanging unit 21 has substantially the same structure as the above-described upper mold exchanging unit 19, and the lower unit main body 83 has a left-right linear Along the guide 85, the lower table 5 is provided so as to be movable and positionable in the longitudinal direction (X-axis direction in the left-right direction in FIG. 3) of the lower table 5 by an X-axis driving means (not shown).

A back-and-forth moving support member 87 is provided on the lower unit main body 83 so as to be movable in the fore-and-aft direction (the Y-axis direction in the horizontal direction in FIG. 2) along the fore-and-aft linear guide 89. 87 is a piston rod 9 of a Y-axis drive cylinder 91 provided on the lower unit main body 83.
3 driven.

A switching cylinder support member 95 is provided on the front-rear movement support member 87 so as to be movable vertically (along the vertical Z axis in FIG. 2) along a vertical linear guide (not shown). The cylinder support member 95 is driven by a Z-axis drive cylinder 97 provided on the back and forth movement support member 87.

A hook member 101 driven by a hook moving cylinder 99 is provided on the switching cylinder support member 95.
Are provided so as to be movable in the front-rear direction (the left-right Y-axis direction in FIG. 2). Further, as shown in FIG. 2, the distal end of the hook member 101 has a hook portion 103 which can be engaged with the above-described mold disengagement button 39 of the punch P or the die D is vertically moved via a hinge 105. The hook portion 103 is provided so as to be rotatable.
It is provided so that it can be inserted.

On the switching cylinder support member 95, a finger member 109 driven by a finger moving cylinder 107 is movable along the upper surface of the hook member 101 in the front-rear direction (the left-right Y-axis direction in FIG. 2). The tip end of the finger member 109 is provided with an inclined surface 81 in a direction in which the upper and lower surfaces become narrower toward the tip.

Referring to FIG. 7 and FIG. 8, the upper mold storage section 111 is provided on the back side of the upper table 3 with the storage section base 11.
A storage unit linear guide 115 is provided on the back surface of the storage unit base 113 and extends vertically. Along the storage unit linear guide 115, a storage unit main body 117 is provided to be vertically movable by a piston rod 121 of a storage unit cylinder 119 provided on the upper table 3. The lower part of the housing part 117 is provided with a housing die mounting part 123 to which a plurality of dies can be mounted. The structure of the storage die mounting portion 123 is such that the die engagement groove 33 similar to the die engagement groove 33 of the upper receiving member 23 of the upper table 3 is attached to the die lock pin 37 of the punch P or the die D. It is provided so as to be engageable.

With the above configuration, referring to FIGS. 9 (A) to 9 (D), FIGS. 10 (A) to 9 (D), FIGS. 11 (A) and 11 (B), the punch using the upper die changing device 17 is used. The operation for replacing the P will be described. The punch P already attached to the mold mounting portion 7 of the upper receiving member 23 of the upper table 3 is described.
The upper mold changing unit 19 is
The front / rear moving support member 57 is moved rightward in FIG. 1 by the operation of the Y-axis driving cylinder 61 to move closer to the front surface of the punch P to be removed by moving in the left-right direction by the rotational driving of the punch P.

Next, at this time, the hook member 55 is pushed forward by the hook moving cylinder 73 with the hook portion 75 inclined downward to the right in FIG. 9A, and the hook member 55 is engaged with the punch P. It passes through the hole 41.

Thereafter, when the finger member 53 is pushed forward by the finger moving cylinder 79 rightward in FIG. 9B, the lower surface of the hook portion 75 of the hook member 55 is lifted from the inclined surface 81 of the finger member 53 to the upper surface. Then, it is rotated upward from the inclined state to the horizontal state.

The hook member 55 is connected to the hook moving cylinder 73.
9 (C) to the left in FIG.
Is pulled in a horizontal state, the hook portion 75 presses the mold engagement release button 39 of the punch P inward, and at the same time, the mold lock pin 37 sinks into the side surface of the punch P and the punch P
The engagement between the and the upper receiving member 23 is released. At this time, since the hydraulic pressure of the hydraulic cylinder of the mold clamp pin 31 has been released before the mold replacement, the engagement state between the upper receiving member 23 and the punch P is completely released.

Next, the upper mold exchanging unit 19 is shown in FIG.
As shown in (D), the grip is held by the hook member 55 and the finger member 53, and in this gripped state, it is lowered by the operation of the Z-axis drive cylinder 69, and the punch P
Is removed from the mold mounting portion 7.

By the operation of the Y-axis drive cylinder 61, the back-and-forth moving support member 57 is moved backward in the left direction in FIG. At this time, the upper mold storage section 111 is
As shown in FIG.
9 and is waiting by lowering.

The finger member 53 and the hook member 55 of the upper mold exchanging unit 19 are raised by the operation of the Z-axis driving cylinder 69, as shown in FIG. It is fitted into the storage die mounting part 123 of the die storage part 111.

Next, the hook member 55 is pushed forward by the hook moving cylinder 73 to the right in FIG. 10D, so that the hook portion 75 moves forward and the pressing of the mold engagement release button 39 is released. . Therefore, the mold lock pin 37 protrudes from the side surface of the punch P and the upper mold storage portion 1
11 and is inserted into the mold engaging groove 33 and locked.

Thereafter, when the finger member 53 is pulled backward by the finger moving cylinder 79 to the left in FIG. 11A, the hook portion 75 of the hook member 55 is turned downward from the horizontal state to the inclined state. At the same time, the upper mold exchanging unit 19 is retracted by the action of the Y-axis drive cylinder 61 to a position where the hook member 55 and the finger member 53 are completely removed from the engagement hole 41 of the punch P.

As shown in FIG. 11B, the upper mold storing section 111 is raised to a predetermined position by the operation of the storing section cylinder 119, and the punch P is stored on the back side of the upper table 3.

As described above, the mold storing operation for storing the punch P mounted on the upper table 3 in the upper mold storing section 111 by the upper mold changing unit 19 has been described. The die setting operation of mounting the desired punch P on the desired die mounting portion 7 of the upper table 3 is the reverse of the above-described die storing operation.

The operation of storing the mold in the lower table 5 is substantially the same as the operation of storing the mold in the upper table 3 described above. The operation of installing the mold in the lower table 5 is the reverse of the operation of storing the mold in the lower table 5. Since the operation is performed, detailed description is omitted.

When actually processing a product, for example, a development view or a three-dimensional view of the bending process of the work W is created based on product information to be processed, such as a manufacturing drawing, and the bending process is performed and used. The mold is determined. When there is no mold that matches the product to be processed, a plurality of split punches P and split dies D are selected in combination with a predetermined length of the product. The mold layout in the press brake 1 is determined, for example, to three stations S _A , S _B , and S _C as shown in FIG.

Based on the determined mold information, the mold stored in the mold storage unit 11 is selected inside the control device.

The mold selected by the control device is moved from the mold storage unit 11 by the operation of the mold exchanging device 17 in accordance with a command from the control device, and the mold mounting unit 7 of the upper and lower tables 3 and 5 is moved. , 9 at predetermined positions. Unnecessary molds are stored in the upper and lower mold storage units 11 from the upper and lower tables 3 and 5.

[0060] As described above, the upper, after which is attached to a predetermined position of each die mounting portion 7 and 9 of the lower table 3 and 5, each as shown in station S _A of FIG. 12 The split punch P and the split die D are spaced apart.

[0061] Accordingly, the divided punches P and the divided dies D are similarly spaced the state shown in the station S _B of Figure 12 is the centering as eliminated. For example, in the plurality of split punches P attached to the upper table 3, the finger members 53 of the above-described upper die changing unit 19 are inserted into the engagement holes 41 of the split punches P on both ends, and the upper die changing unit 19 is formed. Are moved so as to be shifted from both the left and right ends, and the plurality of divided punches P are slid in the mold mounting portion 7 of the upper table 3 so that there is no space between them, and the divided punches P come into close contact with each other.

Thereafter, all the split punches P are moved to the upper table 3 by the operation of the hydraulic cylinder of the mold clamp pin 31.
It is locked to the station S _A.

In the same manner as in the case of the plurality of split punches P of the upper table 3 described above, the split dies D are narrowed. Station S _{A on} Table 5
It is attached to and locked.

As described above, the bending of the workpiece W is started at the station where the mold is automatically installed.

The present invention is not limited to the above-described embodiment, but can be embodied in other forms by making appropriate changes. In the present embodiment, a press brake has been described as an example of a press working machine, but other press working machines may be used.

[0066]

As can be understood from the above embodiments of the present invention, according to the first aspect of the present invention, since the engagement hole is provided in the mold, the engagement can be performed from any side of the mold. The engagement / release switching means is inserted into the engagement hole, and the engagement portion of the mold holder can be easily engaged or released by the engagement / release switching means.

According to the second aspect of the invention, the engagement portion of the mold attached to the upper and lower tables can be easily switched to the released state by the engagement / disengagement switching means of the mold exchanging unit. The mold can be gripped by the gripping member of the replacement unit. After moving the mold exchanging unit holding the mold in one of the upper and lower directions and removing it from the upper and lower tables, the mold exchanging unit is retracted and moved in the longitudinal direction and upward, thereby storing the press unit. Can be stored easily.

In addition, the mold of the storage section can be easily mounted on the upper and lower tables by reversing the above operation.

From the above, when a plurality of divided dies are used in combination in accordance with the length of the product to be processed, the selected dies can be easily stored in the upper and lower tables by using the die changing unit. In addition, since unnecessary dies can be easily stored in the storage section, a plurality of stations according to the length of a product to be processed can be easily installed on the upper and lower tables.

Even when a plurality of split dies are mounted on the upper and lower tables with an interval therebetween, the split dies on both ends are moved by using the gripping member of the die changing unit, whereby the plurality of split dies are moved. To form a station easily.

According to the third aspect of the present invention, after the mold exchanging unit is moved in the longitudinal direction and the front of the upper and lower tables and positioned at the front of a desired mold, the engagement / disengagement switching means is advanced to engage. The dovetail can be inserted into the engagement hole of the mold,
By moving the engaging claw part up or down and retreating, the engaging claw part can be engaged with the engaging part of the mold, and the mold can be easily switched to the released state.

When the mold is mounted on the upper and lower tables, the engagement state with the engagement portion of the mold can be switched simply by moving the engagement claw portion forward, so that the mold can be easily engaged. Can be switched to

[Brief description of the drawings]

FIG. 1, showing an embodiment of the present invention, is a side view of a mold exchanging apparatus including an upper mold exchanging unit.

FIG. 2, showing an embodiment of the present invention, is a side view of a mold exchanging apparatus including a lower mold exchanging unit.

FIG. 3 is a front view of a press brake used in the embodiment of the present invention.

FIG. 4 is a plan view of FIG. 3;

FIG. 5, showing an embodiment of the present invention, is an overall side view of a mold changing apparatus including upper and lower mold changing units.

FIG. 6 is a side view showing a left-right driving mechanism of the upper mold exchanging unit.

FIG. 7 is a front view showing the entire upper storage unit.

FIG. 8 is a side view of FIG. 7;

FIGS. 9A to 9D are operation explanatory diagrams showing the operation of the upper mold exchanging unit.

FIGS. 10A to 10D are operation explanatory diagrams showing the operation of the upper mold exchanging unit following FIGS. 9A to 9D.

11A and FIG. 11B are FIGS. 10A to 10D.
It is an operation explanatory view showing the operation of the upper mold exchanging unit subsequent to FIG.

FIG. 12 is an explanatory view showing a state in which a plurality of split dies are mounted on an upper table and a lower table using a die changing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Press brake 3 Upper table 5 Lower table 7 Die mounting part 9 Die mounting part 11 Die storing part 17 Die changing device 19 Upper die changing unit 21 Lower die changing unit 23 Upper receiving member (Die holder) 33 mold engagement groove 35 lower receiving member (mold holder) 37 mold lock pin (engagement part) 39 mold engagement release button 41 engagement hole 53 finger member (gripping member) 55 hook member (engagement / Release switching means) 75 Hook part (engaging claw part) 111 Upper die storage part 123 Storage die mounting part

Claims (3)

[Claims] In a mold having an engaging portion capable of being disengaged from a mold holder, an engaging / disengaging switching means can be inserted so as to set the engaging portion to an engaged state or a released state. A mold provided with a mating hole. 2. An engagement / disengagement switching means for switching the engagement portion of the mold to an engagement state or a release state with respect to a mold having an engagement portion capable of being disengaged from the mold holder. A mold exchanging unit comprising a holding member for holding an engagement / disengagement switching means inserted into an engagement hole formed in the mold, provided on at least one of the upper and lower tables of the press device; A mold exchanging device, wherein a mold exchanging unit is provided so as to be movable in the longitudinal direction of the table and in the vertical and longitudinal directions. 3. The engagement / release switching means of the mold exchanging unit includes an engagement claw for switching an engagement portion of the mold to an engaged / released state, and the engagement claw is provided on the mold. 3. The mold exchanging device according to claim 2, wherein said mold exchanging device is provided so as to be insertable into said engaging hole and to be movable in front and rear and up and down directions of said insertion direction.