JPH106099A - Slide rod device of press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lock a slide at an arbitrary lift position and to reduce a lifting stroke of a screw shaft and a requiring time when turning the screw shaft. SOLUTION: A twist mechanism 14 in order to turn a screw shaft 11 by 90 degree has a key groove 60 of the screw shaft 11, a key member 61 which is engaged to the key groove 60 freely sliding and supported relatively turning to a lock device body 10 through a ring member 65, and a pair of turn regulating parts to regulate the turn of >=90 degree of the key member 61 installed on the lock device body 10, and the screw shaft 11 is turned with the turning force of a nut member 40 through the friction force acting between the nut member 40 and the screw shaft 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide lock device for locking a slide with respect to a press body of a press so as to be unlockable and restricting a downward movement of the slide, and in particular, for rotating a screw shaft. And an improved twist mechanism.

[0002]

2. Description of the Related Art Conventionally, various types of slide locks have been used to lock a slide with respect to a press body so that the slide can be unlocked when the die of the press is repaired or when the die is replaced. The device has been put to practical use. The slide lock device includes a lock device main body, a vertically extending screw shaft that is disposed in a manner inserted through the lock device main body, and a locking member is attached to a distal end portion, an elevating drive mechanism for driving the screw shaft up and down, and a screw shaft. It has a twist mechanism for rotating by 90 degrees, the locking member is inserted into the locking hole of the locking portion formed on the slide side, and the screw shaft is rotated by 90 degrees to lock the locking portion with the locking member. Stop,
The slide is locked to the press body. Generally, the lifting drive mechanism is constituted by a nut member rotatably mounted on the lock device main body and screwed to the screw shaft, a rotation drive means for rotating and driving the nut member, and various types of twist mechanisms are applied. ing.

For example, a slide lock device 100 shown in FIG.
In, the drive motor 102, gears 103 to 105,
With the lifting drive mechanism 101 having the nut member 106,
The screw shaft 107 on which the locking member 108 is mounted is driven to move up and down. The twist mechanism 110 has a ring member 111 that can move relative to the screw shaft 107 and move relative to the screw shaft 107 and cannot rotate. Thus, the screw shaft 107 is rotated together with the ring member 111 via the gears 113 to 115. However, in the slide lock device 100, since the two motors, the drive motor 102 for driving the screw shaft 107 up and down and the drive motor 112 for rotating the screw shaft 107, are mounted, the device becomes large and the manufacturing cost increases. Will be very expensive.

On the other hand, a slide lock device 120 shown in FIG.
, The lifting drive mechanism 121 includes a drive motor 122,
It has gears 123 to 125 and a nut member 126, and is configured so that the screw member 127 provided with the locking member 128 is moved up and down by rotating the nut member 126. However, in the twist mechanism 130, Spiral groove 131a formed on the outer peripheral surface of screw shaft 127
And a twist engagement groove 131 comprising a straight groove 131b,
The lock device main body 1 is engaged with the twist
32, when the screw shaft 127 is moved up and down by the elevation drive mechanism 121, the screw shaft 127 is engaged with the spiral groove 131a through the engagement of the engagement pin 133 with the spiral groove 131a. It is configured to be turned.

[0005]

However, in the twist mechanism 130 of the slide lock device 120 shown in FIG. 10, the engagement of the engagement pin 133 with the twist engagement groove 131 by raising and lowering the screw shaft 127. The screw shaft 127 can be rotated only at a predetermined vertical position of the screw shaft 127 where the engaging pin 133 is engaged with the spiral groove 131a, and the slide is performed. Inability to lock in any elevating position, screw shaft 12
Screw shaft 127 when turning 7 by 90 degrees
However, there are problems such as an increase in the elevating stroke and the required time.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a slide lock device for a press, in which a slide can be locked at an arbitrary elevating position, reducing the elevating stroke of the screw shaft when rotating the screw shaft and the required time. And so on.

[0007]

According to a first aspect of the present invention, there is provided a slide lock device for locking a slide with respect to a press body of a press so that the slide can be unlocked and restricting a downward movement of the slide. A locking device main body fixed to the press main body side, a vertically extending screw shaft disposed in a manner inserted through the locking device main body, and provided at a lower end portion of the screw shaft, the sliding side when the screw shaft is in the unlocked position. A locking member that can be inserted through the locking hole of the locking portion formed in the locking member and locks the locking portion when the screw shaft is at a locking position rotated by a predetermined angle from the non-locking position; A nut member rotatably mounted and screwed to the screw shaft; and a rotation driving means for rotating and driving the nut member. An elevating drive mechanism for driving, in which a screw shaft with a twist mechanism for the predetermined angle rotated by the rotational force of the nut member during the rotation start of the nut member.

The lifting drive mechanism drives the screw shaft up and down in the non-locking position to lock the locking portion with the locking member, that is, the screw shaft is inserted into the locking hole and locked. When the nut member is rotated by the rotation driving means of the lifting / lowering drive mechanism from a state where the member is located slightly below the locking portion, the rotation of the nut member at the start of rotation of the nut member causes the nut member and the screw shaft to rotate. The screw shaft is rotated by a predetermined angle to the locking position via the frictional force acting therebetween, and the locking portion is locked by the locking member, and the slide is locked to the press body. That is, since the twist mechanism is configured to rotate the screw shaft by the predetermined angle by the rotation force of the nut member at the start of rotation of the nut member, the slide can be locked at an arbitrary elevation position, and the screw shaft can be locked. And the time required for rotating the screw shaft up and down, and the required time.

According to a second aspect of the present invention, in the press lock device according to the first aspect, the twist mechanism includes a straight key groove formed in an outer circumferential surface of the screw shaft in an axial direction, and a sliding groove formed in the key groove. The lock device includes a key member movably engaged and rotatably supported by the lock device main body, and a rotation restricting portion provided on the lock device main body and configured to restrict the rotation of the key member at a predetermined angle or more. is there. That is, by providing the key member and the rotation restricting portion, the screw shaft rotated by the rotational force of the nut member can be easily and reliably switched between the locked position and the non-locked position.

In a third aspect of the present invention, there is provided a slide lock device for a press, wherein a radial bearing rotatably supports a nut member on the lock device body;
An urging member for urging the outer race of the radial bearing upward is provided, and the inner race is slightly floated from the lock device main body through the urging by the urging member to contact the nut member. That is, when the slide lock device locks the slide and a load due to the slide lowering acts on the screw shaft, the load is supported by the lock device body via the nut member and the inner race, so that the radial bearing Can be reliably prevented from being damaged.

According to a fourth aspect of the present invention, in the slide lock device for a press according to the third aspect of the present invention, a break promoting portion for breaking the connection at a predetermined load or more is provided at a connection between the screw shaft and the locking member. Things. That is, when the slide is locked with respect to the press body and the slide is lowered by the driving force of the main motor of the press due to erroneous operation of the press, a large load acts on the slide lock device. By breaking the break promoting portion with a large predetermined load or more, it is possible to prevent the lock device body and various mechanisms and members attached to the lock device body from being damaged.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. The slide lock device of the press of the present embodiment is an example of a case where the present invention is applied to a slide lock device for locking the slide to the press body of the press so that the slide can be unlocked and restricting the downward movement of the slide. is there.

As shown in FIG. 1, a press 1 comprises a base 2,
A crown 3 (corresponding to a press body) having a crank drive mechanism, an upright 4 provided between the base 2 and the crown 3, and a slide 5 guided up and down by the upright 4 to be driven up and down by the drive mechanism. A pair of press slide lock devices 6 at both left and right ends of the crown 3.
(Hereinafter, referred to as a slide lock device), and a pair of locking portions 7 having locking holes 8 are provided on both right and left end surfaces of the slide 5, respectively.

As shown in FIGS. 2 to 7, the slide lock device 6 includes a lock device main body 10 fixed to the crown 3.
A vertically extending screw shaft 11 disposed in a manner inserted into the lock device main body 10, and a screw shaft 1
1 includes a locking member 12 provided at the distal end, an elevating drive mechanism 13 for driving the screw shaft 11 up and down, a twist mechanism 14 for rotating the screw shaft 11 by 90 degrees, and the like.

The locking device body 10 is fixed to the upper plate 20, the bottom plate member 21, the cylindrical member 22 provided between the upper plate 20 and the bottom plate member 21 and the upper end of the upper plate 20 by inner fitting. The top plate 20 and the bottom plate member 21 are connected by a plurality of bolts 24, and the tubular member 22 is
0 and the bottom plate member 21. A proximity switch 26 capable of detecting the lower limit position of the screw shaft 11 and a pair of proximity switches 27 capable of detecting the locked position and the unlocked position of the screw shaft 11 are mounted on the lid member 23.

Concentric holes 20a, 21a and 23a are formed in the upper plate 20, the bottom plate member 21 and the lid member 23, respectively.
The inside of the lid member 23 is formed in a concave portion 23b. Inside the lock device body 10, a ring member 65 is rotatably mounted on the hole 20a via a bearing 67, and a nut member 40 is mounted on the cylindrical member 22 via a pair of upper and lower radial bearings 43, 44. It is mounted rotatably. The upper part of the nut member 40 is the screw shaft 1
The lower portion is formed in a cylindrical portion 42 through which the screw shaft 11 can be inserted. The cylindrical portion 42 extends downward through the inside of the hole 21a, and has a lower end portion. The gear 56 of the rotation drive mechanism 50 is fixed.
Note that a cover member 57 that covers the gears 55 and 56 is attached to the lower surface of the bottom plate member 21.

The screw shaft 11 is inserted into the hole 23 a and the ring member 65, and
1 and extends downward through the cylindrical portion 42. Here, the screw shaft 11 is rotatably screwed to the screw portion 41 via a frictional force acting between the nut member 40 and the screw shaft 11 due to the rotational force of the nut member 40. A straight key groove 60 is formed on the outer peripheral surface of the screw shaft 11 in an axial direction, and a key member 61 fixed to a ring member 65 is slidably engaged with the key groove 60. In addition, the screw shaft 11
A head member 30 having a detected part which can be detected by the proximity switch 26 on the outer peripheral side surface is fixed to the upper end of the head member 30.

The bottom plate member 21 inside the tubular member 22
A ring 47 is vertically slidably fitted in an annular groove 49 formed at the upper end of the upper part, and is moved upward by four springs 48 (corresponding to urging members) arranged at four equally spaced positions in the circumferential direction. Has been energized. The outer race 45 of the radial bearing 44 is urged upward by a spring 48 via a ring 47, and the inner race 46 is slightly lifted from the bottom plate member 21 of the lock device main body 10 by the urging by the spring 48 so that the nut It is in contact with the locking portion 40a of the member 40.

As shown in FIG. 8, the screw shaft 1
The locking member 12 provided at the lower end of the lock member 1 is formed in an oval shape in a plan view, and can be inserted through the locking hole 8 of the locking portion 7 on the slide 5 when the screw shaft 11 is in the unlocked position. Further, the locking portion 7 is locked when the screw shaft 11 is at a locking position 90 degrees from the non-locking position. A bolt hole 35 is formed in the locking member 12, and a bolt 36 is inserted from the bolt hole 35 into the screw shaft 11.
, And the locking member 12 is connected to the tip of the screw shaft 11. The portion of the bolt 36 located inside the bolt hole 37 is a shaft portion 3 slightly smaller in diameter than the screw portion 38.
7, the shaft portion 37 constitutes a rupture accelerating portion 34 that ruptures at a predetermined load or more. The proximity switch 3 that can detect the position of the locking member 12 is provided on the locking portion 7 of the slide 5.
9 is mounted.

As shown in FIGS. 5 and 6, the lifting drive mechanism 13 for lifting and lowering the screw shaft 11 includes a nut member 40 rotatably mounted on the lock device body 10.
And a rotation drive mechanism 50 for rotating the nut member 40. The rotary drive mechanism 50 includes an input shaft 51 for inputting a driving force from a driving device (not shown), a bevel gear 52 fixed to a tip of the input shaft 51, and a driven shaft 54 meshed with the bevel gear 52 and driven vertically. Bevel gear 53 fixed to the upper end,
A gear 55 fixed to the lower end of the driven shaft 54;
5 has a gear 56 fixed to the tip of the nut member 40, and when the driving device is driven, the nut member 40 is rotated through a plurality of gears, and the screw shaft 11 screwed to the nut member 40 is rotated. It is driven up and down.

As shown in FIGS. 5 to 7, a twist mechanism 14 for rotating the screw shaft 11 by 90 degrees is provided with:
The key groove 60 of the screw shaft 11, the key groove 60
And slidably engages with the locking device body 10.
And a pair of rotation restricting portions 62a and 62b provided on the lock device main body 10 for restricting rotation of the key member 61 by 90 degrees or more.
The key member 61 is rotatably supported by the lock device main body 10 via a ring member 65, and the outer peripheral side portion of the key member 61 is movably fitted into a notch 66 of the lock device main body 10, and the notch 66 Of the rotation restricting portions 62a, 62
2b.

The operation of the slide lock device 6 will be described. When the nut member 40 is rotated in the direction of arrow a in FIG.
The rotation of the screw shaft 11 is restricted by the rotation restricting portion 62a, and the screw shaft 11 is driven downward while maintaining the state of the unlocked position. On the other hand, when the nut member 40 is rotated in the direction of arrow b in FIG. 6 by the lifting drive mechanism 13, the twisting mechanism 14 causes the nut member 40 to rotate with the nut member 40 at the start of rotation of the nut member 40. After the screw shaft 11 is rotated by 90 degrees through the frictional force acting between the screw shafts 11, the rotation of the key member 61 is restricted by the rotation restricting portion 62b, and the screw shaft 11 maintains the locked position. Is driven up.

That is, when the slide 5 is locked at an arbitrary elevating position, the screw shaft 11 is driven downward by the elevating drive mechanism 13 so that the screw shaft 11 is inserted into the locking hole 8 and the locking member 12 is locked. 7, the screw shaft 11 is slightly raised by the lifting drive mechanism 13, and the screw shaft 11 is rotated 90 degrees by the twist mechanism 14 to be in the locking position. The locking portion 7 of the slide 5 is locked by the locking member 12, and the slide 5 is locked with respect to the crown 3.

According to the slide lock 6, the twist mechanism 14 is rotated by the rotational force of the nut member 40 to rotate the screw shaft 11 by 90 degrees when the rotation of the nut member 40 is started.
The rotation of the screw shaft 11 can be locked at an arbitrary elevating position, and the elevating stroke of the screw shaft 11 and the time required for rotating the screw shaft 11 by 90 degrees can be reduced. Can be. The twist mechanism 14 includes a key groove 60 of the screw shaft 11, a key member 61 slidably engaged with the key groove 60 and supported to be relatively rotatable by the lock device main body 10, 10 has a very simple structure including a pair of rotation restricting portions 62a and 62b for restricting the rotation of the key member 61 by 90 degrees or more. The screw shaft 11 rotated by the rotational force of 40 can be easily and reliably switched between the locked position and the unlocked position.

Further, the nut member 4 is attached to the lock device body 10.
A radial bearing 44 for rotatably supporting the outer race 45 and a spring 48 for urging the outer race 45 of the radial bearing 44 upward are provided. The inner race 46 is slightly lifted from the lock device main body 10 by the urging by the spring 48. As a result, when the load is applied to the nut member 40 via the screw shaft 11 due to the descent of the slide 5, the nut member 40
Is supported by the lock device main body 10 through the inner race 46, so that the radial bearing 44 can be prevented from being damaged.

The slide 5 is locked with respect to the crown 3 because the joint between the screw shaft 11 and the locking member 12 is provided with a break promoting portion 34 for breaking the joint with a predetermined load or more. If the slide 5 is lowered by the driving force of the main motor of the press 1 due to erroneous operation of the press 1 in this state, a large load acts on the slide lock device 6. Is broken, it is possible to prevent the lock device body 10 and various mechanisms and members attached to the lock device body 10 from being damaged.

In addition to the rotation restricting portions 62a and 62b, a fixing means for fixing the key member 61 so as to be releasable may be provided in order to restrict the movement of the key member 61 with respect to the lock device main body 10. In this case, the screw shaft 11 can be moved up and down while being held at the unlocked position or the locked position. Further, in the upper radial bearing 43, the outer race is urged upward by the urging member, and the inner race is slightly floated from the lock device main body 10 through the urging by the urging member to contact the nut member 40. May be worn.

[0028]

According to the first aspect of the present invention, there is provided a slide lock device for a press, which includes a lock device main body, a screw shaft, a locking member, an elevating drive mechanism for driving the screw shaft up and down, and a twist mechanism for rotating the screw shaft. Since the twist mechanism is configured to rotate the screw shaft by the predetermined angle through the frictional force acting between the nut member and the screw shaft by the rotational force of the nut member at the start of rotation of the nut member, Can be locked at an arbitrary elevating position, and the elevating stroke of the screw shaft and the required time when rotating the screw shaft can be reduced.

According to the slide lock device of the second aspect of the invention, the same effect as that of the first aspect is obtained, but the twist mechanism includes a straight keyway formed in an outer peripheral surface of the screw shaft in an axial direction. A key member slidably engaged with the key groove and rotatably supported by the lock device main body; and a rotation restricting portion provided on the lock device main body for restricting rotation of the key member at a predetermined angle or more. The screw shaft, which is rotated by the rotational force of the nut member, can be easily moved between the locked position and the unlocked position.
Switching can be performed reliably.

According to the slide lock device of the third aspect of the invention, the same effect as that of the second aspect is obtained, but the radial bearing for rotatably supporting the nut member on the lock device main body and the outer race of the radial bearing are raised upward. The inner race is slightly lifted from the lock device main body through the urging by the urging member to abut against the nut member, so that the slide is locked by the slide lock device. If a load acts on the screw shaft due to the lowering of the slide, the load is supported by the lock device main body via the nut member and the inner race of the radial bearing, so that damage to the radial bearing can be prevented.

According to the slide lock device for a press of the fourth aspect, the same effect as that of the third aspect is obtained, but the connection between the screw shaft and the locking member is broken at a predetermined load or more. With the provision of the promoting portion, when the slide is locked to the press body and the slide is lowered by the driving force of the main motor of the press due to erroneous operation of the press, a large load acts on the slide lock device. However, by breaking the break promoting portion with such a large load or more, it is possible to prevent the lock device main body and various mechanisms and members attached to the lock device main body from being damaged.

[Brief description of the drawings]

FIG. 1 is a side view of a press equipped with a slide lock device according to an embodiment.

FIG. 2 is a side view of the slide lock device.

FIG. 3 is a plan view of the slide lock device.

FIG. 4 is a bottom view of the slide lock device.

FIG. 5 is a sectional view taken along line VV of FIG. 3;

6 is a sectional view taken along line VI-VI of FIG.

FIG. 7 is a sectional view taken along line VII-VII of FIG. 5;

FIG. 8 is a vertical cross-sectional view of a screw shaft tip and a locking member.

FIG. 9 is a longitudinal sectional view of a conventional slide lock device.

FIG. 10 is a longitudinal sectional view of a conventional slide lock device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Press 3 Crown 5 Slide 6 Slide lock device 7 Lock part 8 Lock hole 10 Lock device main body 11 Screw shaft 12 Lock member 13 Elevation drive mechanism 14 Twist mechanism 34 Break promotion part 40 Nut member 44 Radial bearing 45 Outer race 46 Inner Race 48 Spring 50 Rotation drive mechanism 60 Key groove 61 Key member 62a, 62b Rotation regulating part

Claims (4)

[Claims] 1. A slide lock device for unlocking a slide with respect to a press body of a press so as to unlock the slide and restricting a downward movement of the slide, comprising: a lock device body fixed to a press body side; A vertically extending screw shaft disposed in the body and inserted through a locking hole of a locking portion provided at a lower end portion of the screw shaft and formed on the slide side when the screw shaft is in a non-locking position. A locking member that is capable of locking the locking portion when the screw shaft is rotated by a predetermined angle from the non-locking position, and is rotatably mounted on the locking device main body and screwed to the screw shaft. An elevating drive mechanism for driving a screw shaft up and down, comprising: a nut member; and a rotation drive means for rotationally driving the nut member; Slide locking apparatus of a press, characterized in that it includes a twist mechanism for the screw shaft by the rotation force of the rotation start time of the nut member of wood is the predetermined angle rotation, the. 2. The twisting mechanism according to claim 1, wherein said twisting mechanism includes a straight keyway formed on an outer peripheral surface of the screw shaft in an axial direction, and slidably engages with the keyway and is relatively rotatable with respect to the lock device main body. The slide lock device for a press according to claim 1, further comprising a supported key member, and a rotation restricting portion provided on the lock device main body, the rotation restricting portion restricting rotation of the key member beyond the predetermined angle. 3. A radial bearing for rotatably supporting a nut member on the lock device main body, and a biasing member for biasing an outer race of the radial bearing upward, and the inner member is biased by the biasing member. The slide lock device for a press according to claim 2, wherein the race is slightly lifted from the lock device main body and is brought into contact with the nut member. 4. A slide lock device for a press according to claim 3, wherein a break promoting portion is provided at a connecting portion between the screw shaft and the locking member to break the connecting portion at a predetermined load or more. .