JP3841511B2 - Press machine change retainer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a change retainer for a press machine, and more particularly, a retainer for holding a punch or die in a holder, and when the punch or die is used for press working, the punch or die is removed from the holder. The present invention relates to a change retainer capable of increasing the amount of protrusion and switching the amount of protrusion so as to reduce the amount of protrusion when not used for press working.
[0002]
[Prior art]
The above press machine change retainer is also called a select retainer set or pierce punch switching device. Depending on the type of workpiece when sheet metal working with multiple sets of punches and dies attached to one press machine This is for selecting a set of punch dies to be used. That is, the punch and die set used for machining is made to protrude from each holder with a large amount of protrusion, and the punch and die set not used for machining is both of the punch or the die. The amount of protrusion is reduced so that it does not hit the workpiece.
[0003]
The basic components of such a change retainer that changes the amount of protrusion of the punch and die are the float part that moves up and down integrally with the punch or die, the casing that guides the raising and lowering, and the back surface of the float part in the lateral direction. These are three select bars that slide up and down to raise and lower the float portion and switch the amount of protrusion.
[0004]
As shown in FIG. 12 and FIG. 13, the conventional one has a flat back surface of the float part a, and a select bar b is formed with a convex part c and a concave part d, and the concave part c and the convex part d. Are connected by a slope. As shown in FIG. 12, the state in which the float portion a is in contact with the convex portion c of the select bar b is a large amount of protrusion, and the state of protruding in the concave portion d as shown in FIG. 13 is a small amount of protrusion. In this state, the punch or die is switched between a state in which the protrusion amount is large and a state in which the protrusion amount is small by the advance / retreat of the select bar b. The float portion is provided with a return spring (not shown) for changing the protrusion amount from a large amount to a small amount.
[0005]
Further, a cylinder device is employed as the drive means for the select bar, but the piston rod is usually connected to the select bar via a plate or the like.
[0006]
[Problems to be solved by the invention]
(1) However, in the conventional change retainer, the stroke L of the select bar b needs to be longer than the diameter of the float part a in order to switch the protrusion amount of the punch and die. For this reason, the change retainer becomes large, and it takes time to switch the protruding amount, which hinders improvement in productivity. Furthermore, when a plurality of change retainers are attached to the holder, there is a problem that the degree of freedom regarding the arrangement of punches and dies is lowered due to the problem of interference between the change retainers.
[0007]
(2) The need to place a return spring around the float is also a factor in increasing the size of the change retainer. Further, since it is necessary to overcome the resistance of the return spring to advance and retract the select bar, the driving means for that purpose has become large, and it has been necessary to cope with the problem of malfunction of the spring.
[0008]
(3) The necessity of interposing a connecting plate between the piston rod of the drive cylinder and the select bar is also a factor in increasing the size of the change retainer. Further, in order to check the drive cylinder, etc., it is necessary to remove the entire change retainer from the holder, and there is a problem that it takes time for maintenance.
[0009]
[Means for Solving the Problems]
The invention of this application is such that when the punch or die is held in the holder and the punch or die is used for pressing, the amount of protrusion from the holder of the punch or die increases and when not used, the amount of protrusion decreases. A change retainer for a press machine that switches the protrusion amount to
A guide that is attached to the holder and supports the punch or die so as to freely advance and retract so that the amount of protrusion changes;
A float that is provided on the back of the punch or die and moves forward and backward together with the punch or die;
A select bar that slides the back surface of the float portion laterally to move the float portion back and forth between a use position where the protrusion amount is large and a non-use position where the protrusion amount is small;
The back surface of the float part and the select bar are formed with recesses and protrusions that can be fitted to each other.
The select bar has a position where the convex portion of the select bar abuts on the convex portion of the float portion so that the protrusion amount of the punch or die increases, and the select bar and the float portion so that the protrusion amount decreases. A drive means for lateral movement at a position where the concave portion and the convex portion of each other fit,
One member of the float part and the select bar is formed with an engagement hole that opens into the recess of the one member, and faces the inner surface of the engagement hole opposite to the other member. In addition, an engaging surface that is inclined so as to move toward the tip side of the float portion as the moving direction of the select bar when the protrusion amount is reduced is formed, and one end of the engaging surface is positioned on the side surface of the recess,
The other member of the float portion and the select bar protrudes from the side surface of the recess of the other member toward the center of the recess with an inclination corresponding to the engagement surface of the one member, and the The protrusion of the other member protrudes toward the one member, and as the select bar moves to reduce the protrusion amount, it abuts on the engagement surface and slides on the engagement surface. Thus, an engagement protrusion is provided to allow the float portion to be moved toward the select bar.
[0010]
Here, the float part may be formed integrally with the punch or die (a part of the punch or die), and is a separate float part to which the punch or die is attached. May be used.
[0011]
In the invention of this application, not only the select bar but also the float is uneven, so the protrusion of the select bar protrudes only by laterally moving between the recess of the float and the protrusion. It will advance and retreat to a state where the amount is large and a state where the amount of protrusion is small, and it is not necessary to move laterally over the entire length of the diameter of the float portion, and the stroke becomes shorter than before.
[0012]
As a result of the lateral movement of the select bar, the engaging projection provided on the other member engages and slides on the engaging surface provided on one member of the float part and the select bar. Since the float portion is moved toward the select bar, the punch or die can be pulled to a state where the protrusion amount is small without being provided with a return spring, and can be held on the select bar.
[0013]
<Regarding unevenness of float and select bar>
Concerning the irregularities of the float part, by forming a concave part in the center of the back surface of the float part, the front and rear parts of the concave part are formed in a relatively projecting convex part. The convex portion is arranged so as to be symmetrical with respect to the center of the float portion, and with respect to the concave and convex portions of the select bar, a concave portion extending in the same direction as the concave portion on the back surface of the float portion is formed and the lateral movement of the concave portion is performed. What is necessary is just to make it form in the convex part which protruded the site | part before and behind the direction relatively.
[0014]
In other words, in this case, the protrusion of the punch or die is reduced by fitting the convex part before or after the select bar into the concave part on the back surface of the float part, and each of the convex parts before and after the select bar is formed on the float part. The protrusion amount is increased by contacting the front and rear projections. Accordingly, the stroke of the select bar is ½ or less of the diameter of the float portion. Further, since the front and rear convex portions of the float portion are supported by the select bar, the state during use becomes stable.
[0015]
Concerning the irregularities of the float part, three or more concave parts are formed on the back surface so as to be arranged at a constant pitch in the lateral movement direction of the select bar, and are formed as convex parts relatively projecting between adjacent concave parts. On the other hand, with respect to the unevenness of the select bar, the protrusion amount of the float portion is increased by abutting on each protrusion portion of the float portion, and the protrusion amount of the float portion is decreased by fitting into each recess portion. Three or more convex portions can be formed so as to be aligned at the same pitch as the concave portions of the float portion in the lateral movement direction.
[0016]
In this case, the float part is formed in an elongated shape, and a plurality of punches or dies are arranged side by side in the horizontal movement direction of the select bar and supported by the float part, and this punch or die is advanced and retracted simultaneously and stably. In addition, even when one punch or die is supported on the float portion, the distance between the concave portion and the convex portion of the float portion is shortened, which is further advantageous for shortening the stroke.
[0017]
<Relationship between select bar and driving means>
In another invention of this application, when the punch or die is held in the holder and the punch or die is used for press working, the protrusion amount from the holder of the punch or die becomes large, and the protrusion amount is small when not used. A change retainer for a press machine that switches the protruding amount so as to be,
A guide that is attached to the holder and supports the punch or die so as to freely advance and retract so that the amount of protrusion changes;
A float that is provided on the back of the punch or die and moves forward and backward together with the punch or die;
A select bar that slides the back surface of the float part laterally to move the float part back and forth between a use position where the protrusion amount is large and a non-use position where the protrusion amount is small;
Drive means for laterally moving the select bar;
The guide is formed in a cylindrical shape, the float portion is inserted into the guide so as to be movable forward and backward, and the select bar is inserted so as to be laterally movable.
A cylinder in which the driving means includes a cylinder fixed to a side surface of the guide, and a piston rod coupled to a piston sliding in the cylinder and inserted into the guide through a through hole in the side surface of the guide. Formed by the device,
A T-shaped connecting portion including a wide portion at the tip and a narrow portion following the wide portion is formed at the tip portion of the piston rod,
At the base end portion of the select bar, a narrow groove portion that opens to the end surface and fits the narrow portion of the piston rod, and a wide groove portion that fits the wide portion of the piston rod are connected in a T-shaped cross section, and at least A T-shaped connecting groove with one end open is formed,
The piston rod and the select bar are connected by fitting the connecting portion and the connecting groove,
In the through hole on the side surface of the guide, the cylinder device is translated in a direction orthogonal to the advancing / retreating direction of the piston rod so that the T-shaped connecting portion of the piston rod is moved with respect to the T-shaped connecting groove of the select bar Allowing attachment / detachment from the open part at one end of the connecting groove and inserting / removing the piston rod into / from the guide are allowed. Thus, a part of the through hole was enlarged in the parallel movement direction with a width comparable to the diameter of the piston rod. An extension is formed.
[0018]
In such a structure, it is not necessary to use a connecting plate or a screw for connecting the piston rod and the select bar, and assembling is facilitated, and the space required for arranging the cylinder device and the select bar can be reduced. it can.
[0019]
Further, in such a structure, the cylinder device can be removed from the guide while the select bar is accommodated in the guide and the guide is attached to the holder, and the maintenance becomes easy.
[0020]
【The invention's effect】
According to the invention of this application, the convex portion of the select bar is formed on the back surface of the float portion and the select bar by forming the concave and convex portions in the advancing and retreating direction and moving the select bar laterally. The protrusion of the punch or die is increased in contact with the convex portion of the die, and the protruding portion is reduced in a position where the concave portion and the convex portion of the select bar and the float portion are fitted together, and the float portion The engagement portion is formed on one member of the select bar and the engagement protrusion is provided on the other member, and the float portion is formed so that the punch or die is in a small protruding amount by the engagement of both. Since it is designed to be pulled and held by the select bar, it is not necessary to move the select bar laterally over the entire length of the float part, and the stroke can be shortened. It is possible to reduce the size of the engine retainer, which is advantageous for improving productivity, and further increases the degree of design freedom regarding the arrangement of punches and dies, and further eliminates the need for a return spring, thereby reducing the size of the change retainer. In addition, the driving force required for the select bar can be reduced.
[0021]
According to the structure in which a recess is formed in the center of the back surface of the float part, the stroke of the select bar can be reduced to 1/2 or less of the diameter of the float part, and the select bar with a large protrusion amount of the punch or die. The support state by becomes stable.
[0022]
When three or more concave portions are formed on the back surface of the float portion so as to be arranged at a constant pitch in the horizontal movement direction of the select bar, a plurality of punches or dies are arranged in the horizontal movement direction of the select bar and supported by the float portion. Thus, it is advantageous for advancing and retreating these punches or dies simultaneously and in a stable state, and it is advantageous for shortening the stroke by shortening the distance between the concave portion and the convex portion of the float portion.
[0023]
A T-shaped connecting portion is formed at the distal end portion of the piston rod of the cylinder device as the driving means, and a T-shaped connecting groove is formed at the proximal end portion of the select bar, both of which are connected to the connecting portion and the connecting groove. And by connecting the cylinder device with the parallel movement of the cylinder device, the T-shaped connecting portion of the piston rod is connected to the T-shaped connecting groove of the select bar. By attaching and detaching from the open part at one end of the connecting groove and inserting and removing the piston rod into the guide, the assembly of the cylinder device and the piston rod select bar is facilitated and the change is made. This is advantageous in reducing the size of the retainer, and the cylinder device is removed from the guide while the select bar is accommodated in the guide and the guide is attached to the holder. Rihazusu it can, its maintenance is easy.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
<Embodiment 1>
This embodiment is shown in FIGS. In FIG. 1, 1 is a punch holder of a press machine, 2 is a die holder, 3 is a presser that presses the workpiece 4 toward the die holder 2, 5 is a change retainer that holds the punch 6 on the punch holder 1, and 7 is a die holder 2. It is a die provided. A spring (not shown) is provided between the punch holder 1 and the presser 3 to urge the presser 3 downward from the punch 6. The presser 3 is moved downward by the punch holder 1. Prior to lowering and holding the workpiece 4 to the die holder 2 side, the punch 6 comes into contact with the workpiece 4 and the punching connection structure and the through-hole structure are combined for the first time by the present invention, and adopted in the change retainer. It has come to give.
[0025]
The change retainer 5 includes a float 8 that holds the punch 6 on the front surface (lower surface in the drawing), a casing (guide) 9 that supports the float 8 so as to be movable up and down, and a position where the float 8 is lowered relative to the casing 9 (punch 6 A selection bar 11 for advancing and retreating to a raised position (a state in which the projection amount is small), and a driving air cylinder device 12 for moving the selection bar 11 laterally. It is equipped with. An engagement pin 13 is fixed to the float 8.
[0026]
As shown in FIG. 2, the float 8 is formed in a columnar shape, and pin holes and bolt holes (both not shown) are opened on the lower surface for positioning and holding the punch 6. On the side of the float 8, a step portion 16 is formed that abuts against an end plate 15 that regulates the descending end of the float 8. A concave groove 17 extending in a direction orthogonal to the stroke direction (lateral movement direction) of the select bar 11 is formed in the center of the upper surface of the float 8 as shown in FIG.
[0027]
The casing 9 has a guide hole 21 penetrating in the vertical direction for guiding the lifting and lowering of the float 8 at the center. A fitting recess 22 in which the end plate 15 is fitted is opened on the lower surface of the casing 9, and a screw hole for attaching the casing 9 to the punch holder 1 is opened. A side surface of the casing 9 is formed on a mounting surface for mounting the cylinder 23 of the cylinder device 12, and a horizontally long through hole 25 for inserting the select bar 11 and advancing and retreating the piston rod 24 of the cylinder device 12 at the center of the mounting surface. Is formed. Further, an extension portion 26 described later is formed in the through hole 25. Further, the upper surface of the casing 9 is closed by a backing plate 27, and the center knock pin 10 is disposed at the center of the packing plate 27 (center of the float 8).
[0028]
The select bar 11 is plate-shaped, and a concave groove 28 perpendicular to the stroke direction is formed at the center of the lower surface. An engagement hole 29 described later is formed in the concave groove 28. A T-shaped coupling groove 31 for coupling to the piston rod 24 of the cylinder device 12 is formed at the base end portion of the select bar 11, and a T-shaped coupling portion 32 corresponding thereto is formed at the distal end portion of the piston rod 24. The select bar 11 and the piston rod 24 are connected by fitting the connecting groove 31 and the connecting portion 32 together.
[0029]
In FIG. 2, 33 is a dust seal plate for a cylinder device, and 34 is a packing.
[0030]
As shown in FIGS. 4 and 5, the float 8 has a concave groove 17 formed at the center of the upper surface thereof, so that the front and rear portions (front and rear in the stroke direction of the select bar 11) sandwich the concave groove 17. It is formed on the convex portions 41 and 41 that protrude relatively downward. Both convex portions 41, 41 are arranged symmetrically with respect to the center of the float 8. Further, both side surfaces of the recessed groove 17 are inclined so as to gradually expand as the groove width increases. Similarly, with respect to the select bar 11, the portions in the stroke direction before and after the recessed groove 28 are formed in convex portions 42 and 43 that protrude relatively upward. Both side surfaces of the concave groove 28 are also inclined so as to gradually expand as the groove width goes downward. Further, the periphery of the upper surface of the float 8 is chamfered so as to be an inclined surface having the same angle as the rear inclined surface of the concave groove 28 of the select lever 11.
[0031]
The concave groove 17 of the float 8 and the concave groove 28 of the select lever 11 are symmetrical, and the concave groove 17 of the float 8 and the convex portion 42 on the front side (front end side) of the select lever 11 are mutually connected. It is formed in a fitting shape.
[0032]
The engagement pin 13 of the float 8 and the engagement hole 29 of the select lever 11 facilitate the transition from a state in which the punch 6 is projecting to a state in which the projecting amount is small and the projecting amount is small by mutual engagement. It is possible to hold in. The engaging pin 13 protrudes from the side surface of the convex portion 41 on the rear side of the concave groove 17 of the float 8, that is, upward from the side surface of the concave groove 17 and obliquely forward, that is, toward the center of the concave groove 17. The inclination angle is the same as the inclination angle of the side surface of the groove 17. The engagement hole 29 is formed at a position closer to the front of the concave groove 28 of the select lever 11 and opens into the concave groove 28, and the inner peripheral surface on the front side of the engagement hole 29 is inclined with respect to the engagement pin 13. The engaging surface 29a is inclined at the same angle as the angle. That is, the engagement surface 29a faces away from the float 8 and moves upward as it goes forward of the stroke of the select bar 11, in other words, the rear of the stroke (selection when the projection amount is made small). It is inclined so as to go to the tip side (downward) of the float 8 as it goes in the direction of movement of the bar 11. One end (lower end) of the engagement surface 29 a is positioned on the side surface of the groove 28.
[0033]
The T-shaped connecting portion 32 of the piston rod 24 is formed by vertically chamfering a portion near the tip of the piston rod 24 having a circular cross section, and as shown in FIG. The narrow portion 32a has a narrow width and the wide portion 32b has a relatively wide tip. The T-shaped connecting groove 31 of the select bar 11 includes a narrow groove portion 31a into which the narrow portion 32a of the T-shaped connecting portion 32 is fitted, and a wide groove portion 31b into which the wide portion 32b of the T-shaped connecting groove 32 is fitted. Become. The narrow groove portion 31a is open to the base end face of the select bar 11, and the wide groove portion 31b is continuous in a T-shaped cross section on the bottom side of the narrow groove portion 31a. Both ends of the T-shaped connecting groove 31 are open to the upper and lower surfaces of the select lever 11.
[0034]
As shown in FIG. 7, the extended portion 26 formed in the through hole 25 of the casing 9 can translate the piston rod 24 downward to remove the connecting portion 32 from the connecting groove 31 of the select bar 11. to be able to do, A part of the through hole 25 is expanded in the parallel movement direction with a width comparable to the diameter of the piston rod 24; Located below the through hole 25. That is, the connecting portion between the connecting portion 32 of the piston rod 24 and the connecting groove 31 of the select bar 11 is not inside the casing 9 but within the thickness range of the wall of the casing 9 on the cylinder device side. In the formed through hole 25, the above Extension 26 is formed, the piston rod 24 can be removed from the select bar 11 by translating the entire cylinder device 12 downward. The expansion part 26 is formed in a size that allows the piston rod 24 to be inserted and removed.
[0035]
Therefore, as shown in FIG. 4, the state in which the select bar 11 is advanced and the front and rear convex portions 42 and 43 and the front and rear convex portions 41 and 41 of the float 8 face each other is as shown in FIG. The float 8 is lowered, so that the punch 6 is in a use state in which the protruding amount is increased. Therefore, when the punch holder 1 is lowered, the punch 6 hits the workpiece 4 and punches it.
[0036]
When the select lever 11 is moved backward, as shown in FIG. 5, the front convex portion 42 is in a positional relationship in which it fits into the concave groove 17 of the float 8, and the float 8 rises together with the punch 6 to a non-use state. . At this time, even if the punch holder 1 is lowered, the punch 6 does not hit the workpiece 4 and the workpiece 4 is not processed.
[0037]
The rise of the float 8 involves the engagement pin 13 and the engagement hole 29, and as the select bar 11 moves backward, the front end of the engagement pin 13 is inclined and the engagement surface 29 a is inclined to the front side of the engagement hole 29. The retracting force of the select bar 11 is converted into a force that raises the float 8 by sliding on the engaging surface 29 a, and the float 8 is lifted together with the punch 6.
[0038]
The float 8 is held on the select bar 11 together with the punch 6 by the engagement between the engagement pin 13 and the engagement surface 29a. Therefore, it is not necessary to separately provide a return spring for raising the float 8. When the select bar 11 is moved forward from the state shown in FIG. 5, the front inclined surface of the front convex portion 42 of the select bar 11 slides on the front inclined surface of the concave groove 17 of the float 8. When the inclined surface on the rear side of the groove 28 of the select bar 11 (the inclined surface on the front side of the rear convex portion 43) slides on the chamfered portion of the upper edge of the float 8, the float 8 is lowered. become.
[0039]
Therefore, in order to move the float 8 up and down, it is sufficient that the convex portion 42 on the front side of the select bar 11 moves between the convex portion 41 on the front side of the float 8 and the groove 17, and its stroke L is equal to the diameter of the float 8. Less than half.
[0040]
In order to assemble the change retainer, the float 8 and the select bar 11 are assembled in the casing 9, and then the piston rod 24 of the cylinder device 12 is inserted from the expansion hole 26 of the through hole 25, and the cylinder device 12 is parallel to the through hole 25 side. The T-shaped connecting portion 32 of the piston rod 24 is fitted in the T-shaped connecting groove 31 of the select bar 11. Thereafter, the cylinder 23 may be fixed to the casing 9. A dust seal plate 33 is interposed between the cylinder 23 and the casing 9.
[0041]
For maintenance of the cylinder device 12, if the cylinder 23 and the casing 9 are uncoupled and the entire cylinder device 12 is translated downward together with the dust seal plate 33, the piston rod 24 enters the expansion portion 26 and the T Since the character-shaped connecting portion 32 is disengaged from the select bar 11, the entire cylinder device 12 may be retracted as it is. That is, it is not necessary to remove the entire change retainer from the punch holder 1.
[0042]
Moreover, in the said embodiment, since the float 8 and the selection bar 11 are accommodated in the casing 9, and since the cylinder 23 of the cylinder device 12 is directly connected to the casing 9, the change retainer is small as a whole, Moreover, the rigidity is high. Further, since the cylinder 23 is directly connected to the casing 9, it is advantageous for preventing foreign matter from entering the cylinder 23.
[0043]
In addition, since the knock pin 10 is arranged at the center of the backing plate 27, the change retainer can be attached to the punch holder 1 by being arranged at an arbitrary angle of 360 degrees with the knock pin 10 as the center. The degree becomes higher.
[0044]
In the above example, the engagement pin 13 is provided. However, as shown in FIGS. 8 and 9, the engagement pin and the engagement hole (engagement surface) may not be provided between the float 8 and the select bar 11. is there. In this case, a return spring for making the float 8 in a state where the punch protrusion amount is small is provided as necessary.
[0045]
<Embodiment 2>
This embodiment is shown in FIG. 10 and FIG. In the figure, 51 is a float, 52 is a casing, and 53 is a select bar.
[0046]
The float 51 is formed in an elongated shape so that a plurality of punches can be mounted in a line, and a large number of concave grooves 54 extending in a direction perpendicular to the stroke direction of the select bar 53 are fixed in the same stroke direction on the upper surface thereof. The protrusions 55 are formed so as to be aligned at a pitch, and are formed on the ridges 55 that relatively protrude between adjacent grooves. The casing 52 is provided with a rectangular guide hole 52 a for guiding the float 52.
[0047]
The select bar 53 has a plurality of ridges 56 that increase the protruding amount of the punch by abutting against the protruding ridges 55 of the float 51 and reduce the protruding amount by fitting into the concave grooves 54. It is formed so as to be arranged at the same pitch as the concave groove 54 of the float 51 in the stroke direction.
[0048]
Further, engagement pins 57, 57 similar to those of the first embodiment are provided at both ends of the float 51, and engagement holes 58 each having an engagement surface 58a corresponding to both ends of the select bar 53 are formed. Has been.
[0049]
As a means for driving the select bar 53, two cylinder devices 59, 59 are connected to the select bar 53. That is, the support plates 60 and 60 are fixed to both ends of the casing 52, and the cylinder 61 of the cylinder device 59 is fixed to the support plate 60 and the casing 52. The piston rod 62 protrudes toward the center through a hole formed between the casing 52 and the support plate 60 and is connected to the select bar 53. Both support plates 60, 60 are stoppers that determine the stroke end of the select bar 53.
[0050]
Therefore, in the case of this embodiment, the state of FIG. 11 is a non-use state in which the protrusion 56 of the select bar 53 is fitted in each concave groove 54 of the float 51 and the punch protrusion amount is small, and the engagement pin 57 and the engagement hole 58 are not in use. The float 51 is held by the select bar 53 by the engagement with the engagement surface 58a. From this state, for example, when one cylinder device 59 is in an open state in which no air pressure acts and the other cylinder device 59 is operated to move the select bar 53 laterally (to the left in FIG. 11), the float 51 and the protrusions 55 and 56 of the select bar 53 come into contact with each other, and the float 51 is in a use state in which the protrusion amount of the punch is increased. In order not to use it, the other cylinder device 59 may be opened and the one cylinder device 59 may be operated.
[0051]
In addition, although each said embodiment is an example which attaches a punch to a change retainer, if this change retainer is turned upside down, it can be used for attachment of die | dye. In the above embodiment, the cylinder device 59 is connected to each of both ends of the select bar 53. However, the cylinder device 59 may be provided only at one end.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a press machine.
FIG. 2 is an exploded perspective view of a change retainer.
FIG. 3 is a perspective view showing the change retainer with a part cut away.
FIG. 4 is a cross-sectional view showing a float and a select bar when using a punch.
FIG. 5 is a cross-sectional view showing a float and a select bar when the punch is not used.
FIG. 6 is a plan view showing a connecting portion between a piston rod and a select lever.
FIG. 7 is a cross-sectional view of a through hole of a casing and an expanded portion thereof.
FIG. 8 is a cross-sectional view showing another example of a float and a select bar when using a punch.
FIG. 9 is a cross-sectional view showing another example of the float and the select bar when the punch is not used.
FIG. 10 is a bottom view showing another embodiment of the change retainer.
11 is a cross-sectional view taken along line AA in FIG.
FIG. 12 is a cross-sectional view showing a float and a select bar when using a conventional punch.
FIG. 13 is a cross-sectional view showing a float and a select bar when a conventional punch is not used.
[Explanation of symbols]
1 Punch holder
2 Die holder
4 Work
5 Change retainer
6 Punch
7 die
8 Float
9 Casing (guide)
11 Select bar
12 Cylinder device (drive means)
13 Engagement pin
17 Groove (concave)
21 Guide hole
23 cylinders
24 piston rod
25 Through hole
26 Extension
28 Groove (concave)
29 engagement hole
29a engagement surface
31 T-shaped connecting groove
32 T-shaped connecting part
41 Convex
42 Convex
43 Convex
32a Narrow part
32b Wide part
31a narrow groove
31b Wide groove
51 Float
52 Casing
53 Select bar
54 Concave groove
55 Projections (convex parts)
52a Guide hole
56 Projections (convex parts)
57 engaging pin
58 engagement hole
58a engagement surface
59 Cylinder device (drive means)
62 Piston rod

Claims (4)

When the punch or die is held in the holder and the punch or die is used for pressing, the amount of protrusion from the holder of the punch or die is increased, and the amount of protrusion is switched so that the amount of protrusion is reduced when not used. A press machine change retainer,
A guide that is attached to the holder and supports the punch or die so as to freely advance and retract so that the amount of protrusion changes;
A float that is provided on the back of the punch or die and moves forward and backward together with the punch or die;
A select bar that slides the back surface of the float portion laterally to move the float portion back and forth between a use position where the protrusion amount is large and a non-use position where the protrusion amount is small;
The back surface of the float part and the select bar are formed with recesses and protrusions that can be fitted to each other.
The select bar has a position where the convex portion of the select bar abuts on the convex portion of the float portion so that the protrusion amount of the punch or die increases, and the select bar and the float portion so that the protrusion amount decreases. A drive means for lateral movement at a position where the concave portion and the convex portion of each other fit,
One member of the float part and the select bar is formed with an engagement hole that opens into the recess of the one member, and faces the inner surface of the engagement hole opposite to the other member. In addition, an engaging surface that is inclined so as to move toward the tip side of the float portion as the moving direction of the select bar when the protrusion amount is reduced is formed, and one end of the engaging surface is positioned on the side surface of the recess,
The other member of the float portion and the select bar protrudes from the side surface of the recess of the other member toward the center of the recess with an inclination corresponding to the engagement surface of the one member, and the The protrusion of the other member protrudes toward the one member, and as the select bar moves to reduce the protrusion amount, it abuts on the engagement surface and slides on the engagement surface. A change retainer for a press machine, characterized in that an engagement protrusion is provided so that the float portion is moved toward the select bar. In the change retainer of the press machine according to claim 1,
A concave portion is formed in the center of the back surface of the float portion, and a front and rear portion of the back surface of the float portion in the lateral movement direction of the select bar is formed as a relatively protruding portion, and both the front and rear convex portions are the float. While arranged symmetrically with respect to the center of the part,
The select bar is formed with a recess corresponding to the recess on the back surface of the float portion, and the front portion and the rear portion of the recess in the select bar lateral movement direction are formed on the front and rear protrusion portions on the back surface of the float portion. It is formed on a relatively protruding convex part that increases the protruding amount by abutting,
A change retainer for a press machine, wherein the protrusion is reduced by fitting a convex portion in front of or behind the select bar into a concave portion on the back surface of the float portion. In the change retainer of the press machine according to claim 1,
While three or more concave portions are formed on the back surface of the float portion so as to be arranged at a constant pitch in the lateral movement direction of the select bar, while the adjacent concave portions are formed as convex portions protruding relatively,
The select bar has three or more protrusions that increase the protrusion amount by abutting against the protrusions of the float portion and reduce the protrusion amount by fitting into the recesses in the lateral movement direction. A change retainer for a press machine, wherein the retainer is formed so as to be arranged at the same pitch as the concave portion of the float portion. When the punch or die is held in the holder and the punch or die is used for pressing, the amount of protrusion from the holder of the punch or die is increased, and the amount of protrusion is switched so that the amount of protrusion is reduced when not used. A press machine change retainer,
A guide that is attached to the holder and supports the punch or die so as to freely advance and retract so that the amount of protrusion changes;
A float that is provided on the back of the punch or die and moves forward and backward together with the punch or die;
A select bar that slides the back surface of the float part laterally to move the float part back and forth between a use position where the protrusion amount is large and a non-use position where the protrusion amount is small;
Drive means for laterally moving the select bar;
The guide is formed in a cylindrical shape, the float portion is inserted into the guide so as to be movable forward and backward, and the select bar is inserted so as to be laterally movable.
A cylinder in which the driving means includes a cylinder fixed to a side surface of the guide, and a piston rod coupled to a piston sliding in the cylinder and inserted into the guide through a through hole in the side surface of the guide. Formed by the device,
A T-shaped connecting portion including a wide portion at the tip and a narrow portion following the wide portion is formed at the tip portion of the piston rod,
At the base end portion of the select bar, a narrow groove portion that opens to the end surface and fits the narrow portion of the piston rod, and a wide groove portion that fits the wide portion of the piston rod are connected in a T-shaped cross section, and at least A T-shaped connecting groove with one end open is formed,
The piston rod and the select bar are connected by fitting the connecting portion and the connecting groove,
In the through hole on the side surface of the guide, the cylinder device is translated in a direction orthogonal to the advancing / retreating direction of the piston rod so that the T-shaped connecting portion of the piston rod is moved with respect to the T-shaped connecting groove of the select bar. A part of the through hole has a width comparable to the diameter of the piston rod so as to allow attachment / detachment from the open portion at one end of the connection groove and insertion / removal of the piston rod into / from the guide. A change retainer for a press machine, characterized in that an extended portion that is enlarged in the parallel movement direction is formed.

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