JPS5854412B2 - Stroke adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a stroke device that allows adjustment of the amount of movement.

In recent industrial machinery, the demand has shifted from mass production using specialized machines to high-mix low-volume production using a single machine.

This is especially true when it comes to production equipment for automobile parts.

This means that when producing with a dedicated machine, there is only one type of product, so there is no adjustment work or time needed to change the type.

On the other hand, when the production type is changed in a high-mix, low-volume production system using a single machine, it is necessary to change and adjust the elements accordingly, and it takes time. If the number or operating time is constant, the production time will be shortened, resulting in a decrease in productivity.

Therefore, in order to improve the productivity of industrial machinery that performs high-mix, low-volume production with a single machine, it is necessary to facilitate the preparation work for changes and adjustments accompanying product changes and to shorten the preparation time.

Among them, the stroke adjustment of adjustable stroke devices has conventionally been as shown in FIGS. 1 and 2.

That is, in FIG. 1, the rod 01 makes a vertical stroke movement as shown through the hole 03 of the stopper block 02.

The stopper block 02 is fixed by a method not shown.

Stopper AO4 is fixed to rod 01 by set screw 06, but by loosening set screw 06, rod 0
It is movable in the axial direction of 1.

The stopper BO5 is fixed to the rod 01 by a method not shown.

FIG. 1 shows the lowest state, and FIG. 2 shows the highest state.

If the distance between the lower end of the rod 01 and the upper surface of the stopper block 02 is ld and lu in FIGS. 1 and 2, respectively, the stroke amount S of the illustrated stroke device becomes 1d-1u.

When changing the stroke amount S, loosen the set screw 06 in the state shown in FIG. 2 and move the stopper AO4 to an arbitrary position on the axis of the rod 01.

Then, a new stroke amount is determined using a measuring instrument such as a scale or a caliper, and the stopper AO4 is fixed to the rod 01 by locking the set screw 06 again.

However, the conventional device described above has the following drawbacks.

(1) Stroke adjustment is manual and takes time;
Adjustment accuracy varies or varies from person to person.

(2) If there are a plurality of adjustment devices or locations as shown in the figure, it will take more time and the adjustment accuracy will vary or vary from person to person.

This has a negative impact on the quality of the product produced, and the long preparation time reduces the productivity of the machine.

The present invention is provided to obviate the drawbacks of prior art devices.

In a pair of screws, which are one of the basic mechanical elements, by rotating one of the male or female threads, the amount of linear movement of the other is extremely accurate, as seen in micrometers, precision measuring instruments. This takes advantage of the fact that there is no problem in replacing the linear dimension with the rotation amount of the screw, and the gist is that the position can be adjusted with respect to the stroke member that moves linearly. In a stroke adjustment device consisting of a stopper attached to a stroke member and a stopper block fixed at a position where the stopper can come into contact, the stopper is screwed to the stroke member and a gear is formed on the outer periphery of the stroke member. An adjustment gear that meshes with the gear, a drive device that rotationally drives the adjustment gear, a screw shaft that is rotatably supported and that transmits rotation related to the rotation of the adjustment gear, and a screw shaft that is threaded onto the screw shaft. A holder that is fitted together and whose rotation is regulated and is slidable in the direction of the screw axis, generates a drive device stop signal when they approach each other, and one of them approaches the holder, and the other holder changes its position along the screw axis direction. An embodiment of the stroke adjustment device according to the present invention, which is characterized by comprising an adjustable detecting means, will be described with reference to the drawings shown in FIGS. 3 and 4.

In Figure 3, rod 1 has a right-hand male thread (pitch is Ta)
is cut, and stroke movement is made in the vertical direction through the round hole 3 of the stopper block 2 in the illustrated case.

The stopper block 2 is fixed by a method not shown.

The stopper A4 is a spur gear with a number of Ga teeth, and has a female thread in the center thereof that is the same size as the male thread of the rod 1, and is screwed into the rod 1.

The stopper B5 is fixed to the rod 1 by a method not shown.

A spur gear 6 having a number of teeth Gb is supported by a bearing 9 while meshing with a gear of a stopper A4.

The tooth width of the spur gear 6 has such a dimension that the stopper A4 does not come off from the spur gear 6 even when the rod 1, the stopper A4, etc. perform stroke movements and the amount of adjustment of the stopper A4 is included.

One side of the spur gear 6 is connected via a camp ring 1 to a geared motor 8 with a brake, which is a drive device of this device and is capable of forward and reverse rotation.

The brake of the geared motor 8 with a brake is configured such that the brake is released only when the motor is energized and rotates, and the brake is operated when the motor is not energized.

The rod 1 itself has a structure that does not rotate by a method not shown.

When the rod 1 makes a stroke motion in the vertical direction in the state shown in FIG. 3 (when the geared motor 8 with brake is not energized), the stopper A4 similarly makes a stroke motion along the tooth trace of the spur gear 6.

At this time, since the brake of the geared motor 8 with a brake is in effect, the spur gear 6 does not rotate and therefore the stopper A4 also does not rotate, so the stroke amount does not change.

On the other side of the spur gear 6 is a sprocket 1 having the number of teeth Na.
0 is attached and via a parallel chain 12,
It is connected to a sprocket 11 having an i number Nb attached to an end of a threaded rod 14.

A threaded rod 14 having a right-hand male thread (pitch Tb) is supported by a hole 15 in the frame 13 and is mounted so as to be rotatable without play in the axial direction.

A guide rod A17 and a guide rod B19 are attached to the frame 13 in parallel with the threaded rod 14.

A holder 16 having a female thread of the same size as the threaded rod 14 is threadedly engaged with the threaded rod 14 so as to move in the axial direction when the threaded rod 14 is rotated, and is guided by a guide rod A17.

A rimming switch 21 is attached to the holder 16, and an adjustment program 18 for operating the seat switch 21 is supported by a guide rod B19 in a manner not shown so that it can move only in the axial direction of the threaded rod 14. ing.

The set screw 20 is for fixing the adjustment block 18 to the guide rod B19.

The limit switch 22 is attached to the frame 13 and detects the maximum stroke that can be adjusted by the device according to the movement of the holder 16, and is activated when the holder 16 comes into contact with the limit switch 22.

The scale 23 has graduations based on the top surface of the stopper block 2, which represents the stroke amount of this device.

A scale 24 is also attached to the frame 13.

Now, with this device, when the rod 1 is stopped in the highest raised state by a method not shown, and the geared motor 8 with a brake is rotated in the direction of the arrow A shown in the figure, the stopper A4 that meshes with the spur gear 6 rotates and moves in the direction shown by the arrow A. move in the direction.

At the same time, the holder 16 moves in the two directions shown by the arrows as the sprocket 10 connected to the spur gear 6, the chain 12, and the threaded rod 14 connected via the sprocket 11 rotate in the directions shown by the arrows.

The numbers of teeth of the stopper A4 and the spur gear 6 are Ga and Gb, respectively.
, the number of teeth of sprocket 10 and sprocket 11 is N
a, Nb, and the thread pitch of rod 1 and threaded rod 14 are each T.
Since a and Tb, the following equation holds true.

Amount of movement of the holder 16 'rb-Na-Ga=c Amount of movement of the stopper A4 Ta-Nb-GbC is a ratio between the amount of movement of the stopper A4 and the amount of movement of the holder 16 caused by rotating the geared motor 8 with brake This shows that.

That is, when C=1, the stopper A4 and the holder 16 have the same amount of movement, and when C=2, if the amount of movement of the stopper A4 is 1, the amount of movement of the holder 16 is 2.

In FIG. 3, the pointer of the adjustment block 18 is on the scale 24.
This indicates that the stroke amount of the stroke device is O- on scale 23 or scale 24.
This means that it is a dimension between X.

Moreover, in FIG. 4, the male threaded part of the rod 1 in FIG. 3 has been changed to a rod 1a that is also provided at the bottom, and the stopper B5 fixed to the rod 1 has been changed to a stopper B5a that has the exact same shape as the stopper A4. Then, move stopper B5a to rod 1.
A is meshed with the spur gear 6a to allow it to rotate and move in the axial direction, and means for rotating the spur gear 6a in forward and reverse directions, a stroke adjustment device, etc. (partially not shown) are similar to the embodiment shown in FIG. This is another embodiment in which one set of stroke adjustment devices is similarly provided, and shows a case where the range of stroke amount change as a stroke adjustment device is expanded.

Next, referring to FIG. 3, a procedure for changing the stroke amount from the illustrated state will be described.

(1) When changing the stroke amount from 0-X to 0-Y on the scale 23 or 24, loosen the set screw 20 of the adjustment block 18, and then move the needle on the guide rod 19 to the Y of the scale 24. Move it until it matches the mark, and then tighten the set screw 20 to fix the adjustment block 18 to the guide rod 19.

The above preparation work can be done even when the stroke device such as the rod 1 is in operation, and it can be said that it is not included in the preparation time in production.

(2> Stop the rod 1 at the highest position shown in FIG. 3 by a method not shown.

(3) When the geared motor 8- with brake is rotated in the direction of the arrow A shown in FIG. 3, the stopper A4 and the holder 16 move in the direction of the opening and the direction of the arrow 2 shown in the figure, respectively.

Then, when the holder 16 is activated, the geared motor 8 with a brake is stopped.

In this case, the stopper A4 stops at the Z mark position on the scale.

This means that this is the maximum stroke amount for this device.

(4) When the geared motor 8 with brake is rotated in the direction opposite to the direction of the arrow A shown in FIG. 3, the stopper A4 and the holder 16 move in the direction opposite to the direction of the arrow and the direction shown in the figure.

Next, when the foot switch 21 attached to the holder 16 comes into contact with the adjustment block 18 whose setting was changed earlier and is activated, the geared motor with brake is stopped.

At this time, the lower surface of the stopper A4 matches the Y mark on the scale 23, and the stroke amount is changed.

By adding an electric control circuit and an operation panel (not shown) to the operation described above, it is possible to change and adjust the stroke amount only by moving the adjustment block 18 in FIG. 3 and pressing buttons on the operation panel (not shown). Become.

The present invention, which operates as described above with reference to the embodiments, has the following effects.

(1) Compared to conventional devices, it is divided into a part that actually performs stroke motion and a part dedicated to stroke amount adjustment, so the stroke amount adjustment section can be installed at any position in the machine.

(2) For example, in FIG. 3, the work of moving the adjustment block can be done even during operation, so work efficiency is improved.

[Brief explanation of the drawing]

1 is a front view showing a conventional device, FIG. 2 is a front view showing a state moved from the state shown in FIG. 1 to another stroke end, FIG. 3 is a front view showing an embodiment according to the present invention, and FIG. The figure is a front view showing another embodiment according to the present invention. 1... Rod, 2... Stopper block, 4... Stopper A, 5... Stopper B, 6... Spur gear, 8 ......Gard motor with brake, 10...Sprocket,
11...Sprocket, 12...Chain, 13...Frame, 14...Threaded rod,
16...Holder, 17...Guide rod A
118...Adjustment block, 19...Guide rod B, 21...---Limit switch,
22...Limit switch.

Claims (1)

[Claims] 1. In a stroke adjustment device consisting of a stopper whose position can be adjusted with respect to a stroke member that operates linearly, and a stopper block which is fixed at a position where the stopper can come into contact, the stopper is attached to the stroke member. an adjusting gear which is screwed into the adjusting gear and has a gear formed on its outer periphery, which meshes with the adjusting gear; a drive device which rotationally drives the adjusting gear; and a drive device which is rotatably supported and is related to the rotation of the adjusting gear. When a screw shaft to which rotation is transmitted and a holder screwed onto the screw shaft and whose rotation is regulated and is slidable in the axial direction of the screw shaft come close to each other, a drive device stop signal is generated. A stroke adjustment device characterized in that the holder includes a detection means, the other of which is provided so that its position can be adjusted along the axial direction of the screw shaft.