JPS5827077B2 - drive device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive device of the type that uses a screw drive shaft to selectively move one or more units along its longitudinal axis, and in particular to The present invention also relates to a drive device suitable for a slitter for slitting a sheet-like object into a constant width dimension.

In this type of slitter driving device, a mechanism is desired that can easily and reliably determine and change the slitter width and has a simple structure.

In Patent Application No. 107498 of 1982 (see Japanese Patent Application Laid-Open No. 54-63473), the present applicant connects each slitter bracket to each female threaded body screwed onto a screw shaft for moving a slitter via a clutch. The movement of the slitter blade is achieved by rotating the screw shaft for moving the slitter and selectively energizing only the clutch of the slick bracket that requires movement, thereby mechanically connecting the slitter bracket and the female screw body. , thereby allowing the female threaded bodies of the selected slitter brackets to move rotationally relative to the slitter movement screw shaft, and thus only the female threaded bodies, and therefore the selected slitter brackets, are capable of rotationally moving relative to the slitter movement screw shaft. We have proposed a slitter drive device that is moved along the screw shaft.

This slitter drive device can selectively move the slitter blades by simply driving the common slitter movement screw shaft and selectively turning on and off each clutch, making the device structure very simple and inexpensive. However, even when the clutch is off, the female threaded body and the threaded shaft for moving the slitter are screwed together, and the female threaded body may move against the screw shaft due to the inertia of the female threaded body or the slight frictional resistance of the bearing. There may be a relative rotational movement, and it may not always be possible to obtain an accurate slitter width.

Further, this slick drive device requires a separate device as a rotation drive device for each slick blade from a drive device for the screw shaft for moving the slitter.

In view of these points, the present applicant proposed in Patent Application No. 100392 of 1978 (see Japanese Unexamined Patent Application Publication No. 56-27794) that for slitter blades that do not require movement, the screw shaft and female threaded body are definitely connected. For slitter blades that require movement, the internal threaded body can be completely fixed to the slide base, allowing the slitter width to be determined and changed accurately and easily at all times. We have proposed a simple and inexpensive slitter driving device.

Furthermore, in the aforementioned patent application, the present applicant also proposed a structure of a slitter drive device in which the movement of the slitter blade and the rotational drive of the slitter blade can be performed by a very simple mechanism using the same drive source.

These slitter drive devices are a revolutionary improvement in that they can reliably and accurately determine and change the slitter width, and can move and rotate the slitter blades using the same drive source. In the structure of the embodiment described in the specification and drawings of the above-mentioned patent application, a rotary joint is used to connect an air clutch and an air pressure source for coupling and separating the screw shaft and the female threaded body. It is a thing,
If there is such a rotating contact part, there will be no particular problem when driving at low speeds, but when driving at high speeds, there may be a problem with heat generation at the rotating contact part, although it is completely satisfactory. do not have.

SUMMARY OF THE INVENTION In view of the above circumstances, it is an object of the present invention to be able to reliably and accurately determine and change the position of one or more units such as slitter knives with a very simple and inexpensive configuration, and to ensure that the same It is an object of the present invention to provide a drive device which can move each unit and drive itself by a drive source, and which does not cause any problem of heat generation even during high-speed operation.

Next, the present invention will be described in detail with regard to embodiments of the present invention based on the accompanying drawings.

FIG. 1 is a longitudinal sectional view showing a portion of an embodiment of the driving device of the present invention applied as a slitter driving device, and reference number 1 indicates a slitter driving screw shaft extending in the horizontal direction.

A slide keyway 2 extending in the axial direction is formed around the screw shaft 1.

This screw shaft 1 is adapted to be rotationally driven by an appropriate drive source (not shown).

The female screw body 4, which has a female thread 4A that is screwed into one male thread of the screw shaft 1, is rotatable within the lower blade slide base 3 by bearings 5A and 5B.

This lower blade slide base 3 is movable on a slide beam 31.

A lower blade rotation shaft 9 is provided at the upper part of the lower blade slide base 3 so as to be rotatable with a bearing 8.

A lower slitter blade 10 is removably attached to the left end (in the figure) of the lower blade rotating shaft 9.

A pulley 11 for hanging a belt (not shown) is provided at the right end of the lower blade rotating shaft 9.

This belt is hung between a pulley 13, which will be described later.

An air clutch 16 is attached to the lower blade slide base 3 using a tool 14 for attachment and a bolt 15 for tightening.

The air clutch 16 is supplied with air pressure from an appropriate air pressure source through a supply passage 17 provided in the base 3, an air conduit 1B, and a solenoid switching valve 30.

When no air pressure is applied to this air clutch 16, as shown in the figure, the brake shoe 1
6A is separated from each other, the base 3 and the screw acid screw body 4 are separated from each other, but when air pressure is applied, the brake shoe 16A contacts the outer peripheral wall of the backlash adjustment screw 6 at a predetermined pressure. This acts to integrally connect the screw body 4 and the base 3.

This backlash adjustment screw 6 is provided with a screw cleaner 12.
Reference numeral 2 is for engaging with and cleaning the trough of one male screw of the screw shaft 1.

Further, a spline shaft 19 is engaged with the screw shaft 1.

This spline shaft 19 is provided with a slide key 20, and this slide key 20 fits into the slide key groove 2 of the screw shaft 1.

Furthermore, a keyway 19A extending in the longitudinal direction is formed on the outer periphery of the left end (in the drawing) of the spline shaft 19.

A key groove 19A of the spline shaft 19 is provided with an actuating body 23A of the air clutch so as to be engaged with the key groove.

A brake shoe 23B is provided on the conical surface at the left end (in the figure) of the actuating body 23A.

Further, the right end (in the figure) of this actuating body 23A is coupled to an actuating piston 23D of the air clutch via a ball bearing 23C.

The operating piston 23D is moved in the longitudinal direction by an air clutch cylinder 23E formed in the base 3.

The spline shaft 19 and the actuating body 23A are rotatable within the base 3 via bearings 21 and 23C.

With such a configuration, the spline shaft 19 can slide along the slide key groove 2, that is, in the axial direction of the screw shaft 1, and when the screw shaft 1 is rotationally driven, the spline shaft 19 can slide through the slide key 20. can be rotated together with the screw shaft 1.

Air pressure is supplied to the air clutch cylinder 23E from an air pressure source through a passage 26 provided in the base 3, a supply passage 24, an air conduit 27, and a solenoid switching valve 30.

The operating body 23A of this air clutch is a cylinder 23E.
When no air pressure is applied to the piston 23D, the piston 23D is shifted to the right by the biasing force of the countersunk spring 23F. The spline shaft 19 and the screw threaded body 4 are spaced apart from the inner circumferential surface 4B.
and are separated from each other.

However, when air pressure is applied to the cylinder 23E, the biston 23D is moved to the left (in the figure) against the biasing force of the disk spring 23F, and therefore the actuating body 23
A also connects the spline shaft 19 via the bearing 23C.
The brake shoe 23B contacts the conical inner circumferential surface 4B of the screw threaded body 4 with a predetermined pressure, and the screw acid threaded body 4 and the spline shaft 19 are integrally combined.

A pulley 13 is attached to the right end (in the figure) of the spline shaft 19 for rotating the lower blade rotation shaft 9 by hanging a belt between it and the pulley 11 provided on the lower blade rotation shaft 9. There is.

Next, the operation of the slitter driving device configured as described above will be explained.

First, when determining or changing the slit width, if it is desired to move the slitter lower blade 10 along the axial direction of the screw shaft 1, the solenoid switching valve 30 is switched, air pressure is applied to the air clutch 16, and the air clutch It is assumed that no air pressure is applied to the cylinder 23E.

In this state, when the screw shaft 1 is driven to rotate, the backlash adjustment screw 6 and the screw acid screw body 4 are integrally connected to the lower blade slide base 3 via the air clutch 16, so that the screw acid screw body 4 and the screw shaft 1, and as a result, the screw thread body 4, and therefore the slide base 3 and the lower slitter blade 10, move relative to the fixed screw shaft 1.

At this time, the air clutch actuating body 23A is deenergized and the spline shaft 19 is separated from the screw threaded body 4, so the bearings 21 and 23C are rotated as the screw shaft 1 rotates separately from the screw threaded body 4. As the base 3 moves, the slide key 20 slides in the slide key groove 2 and moves in the axial direction of the screw shaft 1.

If the direction of rotation of the screw shaft 1 is reversed, the lower slitter blade 1
It will be clear that 0 can be moved in the opposite direction in the axial direction of the screw shaft 1.

If you do not want the slitter lower blade 10 to move when the screw shaft 1 is driven to rotate, switch the solenoid switching valve 30.
The state is such that air pressure is applied to the air clutch cylinder 23E and no air pressure is applied to the air clutch 16.

In this state, as the screw shaft 1 rotates, the spline shaft 19 is rotated together with the screw shaft 1 within the base 3 as before.

At this time, the spline shaft 19 and the screw acid screw body 4 are integrally connected by the air clutch operating body 23A, and on the other hand, since the air clutch 16 is deenergized, the backlash adjustment screw 6 and the screw acid screw body 4 are integrally connected. A screw body 4 is separated from the base 3.

Therefore, the spline shaft 19, the air clutch operating body 23A, the screw acid screw body 4, and the backlash adjustment screw 6 rotate together with the screw shaft 1 within the base 3 at the bearings 21223c, 5B, and 5A.

In this way, the screw thread body 4 and the screw shaft 1 rotate together at the same speed, so even if the female thread 4A and one male thread are screwed together, there is no relative rotation between them. No movement occurs, and therefore, the rotation of the screw shaft 1 completely prevents the screw acid screw body 4, and therefore the base 3 and the lower slitter blade 10, from moving in the axial direction of the screw shaft 1. .

In this case, as in the illustrated embodiment, the rotational movement of the screw body 4 is controlled by the spline shaft 19 and the pulley 13.
If the rotational force is transmitted to the lower blade rotating shaft 9 via a belt (not shown) and a pulley 11, the lower blade 10 can be rotationally driven by the rotational drive of the screw shaft 1.

At this time, by hooking the belt to the pulley 11 via a one-way clutch, it is possible to prevent the slitter blade from rotating in the opposite direction to the moving direction of the strip of paper or the like to be slit. This makes it possible to cut the strip smoothly even while the slitter is moving.

In the above description, only a mechanism for one lower slitter blade has been described, but the slitter apparatus includes a similar lower slitter blade mechanism and a corresponding upper slitter blade mechanism.

Each of these mechanisms is similar to the mechanism shown in the figure, and by controlling the air clutches 16 and 23A to 23F of each mechanism on and off as described above, each slitter blade is moved in the axial direction of the screw shaft and stopped. By setting S, the interval between each slitter blade can be appropriately determined or changed.

In the embodiment described with reference to FIG. 1, since it was considered that the lower blade 10 is rotated by the rotation of the screw shaft 1, the spline shaft 19 and the air clutches 23A to 23F are
Although its structure is somewhat complicated as shown in FIG. It can be done.

FIG. 2 is a longitudinal cross-sectional view showing a portion of another embodiment of the present invention, and since the structure is the same as that of the embodiment shown in FIG. 1 except for the points described below, a description thereof will be omitted.

In the device of the embodiment shown in FIG.
A was provided so as to be slidably engaged with the keyway 19A of the spline shaft 19, but this second
In the illustrated embodiment, components such as the spline shaft 19 are omitted since there is no need to provide transmission for the rotation of the lower blade.

Therefore, in the embodiment shown in FIG.
3A' is provided with a slide key 20', and this slide key 20' is fitted into the slide key groove 2 of the screw shaft 1, so that the air clutch actuating body 23A' is directly connected to the screw shaft 1. It is attached around 1.

Furthermore, this air clutch actuating body 23A' can rotate with the rotation of the screw shaft 1 within the base 3 by means of the needle bearing 32, and can also move relative to the base 3 in the direction of the longitudinal axis of the screw shaft 1. It is connected to the base 3 as shown in FIG.

Reference number 33 indicates an oil seal.

The rest of the structure is the same as the embodiment shown in FIG. 1, and because of this structure, the air clutch operating body 23A' is
It can be slid along the slide key mechanism 2, that is, in the axial direction of the screw shaft 1, and when the screw shaft 1 is rotationally driven, it can be rotated together with the screw shaft 1 via the slide key 20'.

This air clutch actuating body 23A' is a cylinder 23E.
When no air pressure is applied to the piston 23D, the biasing force of the disc spring 23F shifts the piston 23D to the right. It is spaced apart from the inner circumferential surface 4B and separates the actuating body 23A' and the screw body 4 from each other.

However, when air pressure is applied to the cylinder 23E, the piston 23D is moved to the left (in the figure) against the biasing force of the disc spring 23F, and therefore the actuating body 23A
' is also slid to the left along the slide keyway 2 of the screw shaft 1 via the bearing 23C, and the brake shoe 23
B comes into contact with the conical inner circumferential surface 4B of the acid screw threaded body 4 under a predetermined pressure, thereby integrally coupling the acid screw threaded body 4 and the air clutch operating body 23A'.

Next, the overall operation of the slitter driving device shown in FIG. 2 will be explained.

First, when determining or changing the slit width, if you want to move the slitter lower blade 10 along the axial direction of the screw shaft 1, switch the solenoid switching valve 30 so that no air pressure is applied to the air clutch 16. state.

In this state, when the screw shaft 1 is driven to rotate, the backlash adjustment screw 6 and the screw acid screw body 4 are integrally connected to the lower blade slide base 3 via the air clutch 16, so that the screw acid screw body 4 and the screw shaft 1, and as a result, the screw thread body 4, and therefore the slide base 3 and the lower slitter blade 10, move relative to the fixed screw shaft 1.

At this time, the air clutch operating body 23A' is deenergized and is separated from the screw threaded body 4, so the bearing 23C and the It rotates within the base 3 by the needle bearing 32, and as the base 3 moves, the slide key 20' slides in the slide key groove 2 and moves in the axial direction of the screw shaft 1.

If the direction of rotation of the screw shaft 1 is reversed, the lower slitter blade 1
It will be clear that 0 could be moved in the opposite direction in the axial direction of the screw shaft 1.

If you do not want the slitter lower blade 10 to move when the screw shaft 1 is driven to rotate, switch the solenoid switching valve 30.
The state is such that air pressure is applied to the air clutch cylinder 23E and no air pressure is applied to the air clutch 16.

In this state, as the screw shaft 1 rotates, the air clutch actuating body 23A' is rotated together with the screw shaft 1 within the base 3 as before.

At this time, the air clutch operating body 23A' has been moved to the left and the brake shoe 23B is in contact with the conical inner circumferential surface 4B of the screw acid threaded body 4 with a predetermined pressure, so that it is integrated with the screw acid threaded body 4. on the other hand,
Since the air clutch 16 is deenergized, the backlash adjustment screw 6 and the screw acid screw body 4 are connected to the base 3.
separated from.

Therefore, the air clutch actuating body 23A', the screw acid screw body 4, and the backlash adjustment screw 6 are connected to the needle bearing 32, the bearings 23C, 5B, and 5A.
It rotates together with the screw shaft 1 within the base 3.

In this way, the screw thread body 4 and the screw shaft 1 rotate together at the same speed, so even if the female thread 4A and one male thread are screwed together, there is no relative rotation between them. No movement occurs, and therefore, the rotation of the screw shaft 1 completely prevents the screw acid screw body 4, and therefore the base 3 and the lower slitter blade 10, from moving in the axial direction of the screw shaft 1. .

The device of the embodiment shown in FIG. 2 has a simplified structure because the transmission mechanism for rotating the lower blade can be omitted.

In this embodiment, the lower blade rotation shaft 9 is rotationally driven by a separate drive mechanism.

As is clear from the above, according to the configuration of the drive device of the present invention, the slitter blade can be moved by rotating the screw shaft, and for those who do not want the slitter blade to move, the screw shaft can be moved Since it is possible to prevent the entire slitter from moving despite the rotational drive, the slitter width can always be set accurately.

Furthermore, since the slitter blade can be rotationally driven by the rotational drive of the screw shaft, the structure of the entire slitter drive device can be made simple, compact, and inexpensive.

Furthermore, in the drive device of the present invention, since rotating contact parts such as rotary joints are completely eliminated, there is no problem of heat generation even during high-speed operation.

Although the drive device of the present invention has been described as a slitter drive device, the present invention is not limited to this, and the present invention is not limited to this. This is effective when applied to a type of drive device that selectively moves the above units.

[Brief explanation of the drawing]

FIG. 1 of the accompanying drawings is a longitudinal sectional view showing a part of an embodiment of a slitter driving device to which the present invention is applied, and FIG. 2 is a longitudinal sectional view showing a part of another embodiment of the slitter driving device to which the invention is applied. It is a diagram. 1... Screw shaft for driving the slitter, 2...
Slide keyway, 3...lower blade slide base,
4...Screw acid screw body, 5A, 5B...
... Bearing, 6 ... Backlash adjustment screw, 7 ... Backlash adjustment bold,
8...Bearing, 9...Lower blade rotating shaft, 10...Slitter lower blade, 11°13.
...Pulley, 16...Air clutch,
17... Supply passage, 18... Air conduit, 19... Spline shaft, 20, 20'
......Slide key 21...Bearing, 23A, 23A'...Air clutch operating body, 23C...Bearing, 23D...
Piston, 23E...Cylinder, 23F...
... disc spring, 24 ... supply passage, 26 ...
...Aisle, 27...Air conduit, 30...
... Solenoid switching valve, 31 ... Slide beam, 32 ... Needle bearing.

Claims (1)

[Scope of Claims] 1. A drive device of the type that selectively moves one or more units along the axial direction using a drive screw shaft, the drive shaft extending through the slat base of the unit and extending in the peripheral axial direction. The slide base includes a driving screw shaft having a slide key groove extending into the screw shaft, and a drive source for rotationally driving the screw shaft, and the slide base has a recess surrounding the screw shaft. , further comprising a conical inner peripheral surface provided in the recess of the slide base, screwed onto the screw shaft, rotatable with respect to a peripheral inner wall of the recess of the slide base via a bearing, and at one end in the axial direction. a screw threaded body having a structure, and a screw threaded body disposed between a peripheral inner wall of the recess of the slide base and an outer peripheral wall of the screw threaded body, and fixed to the peripheral inner wall side and actuated in the radial direction of the screw shaft. an air clutch that connects and separates the slide base and the screw screw body; and an air clutch that connects and separates the slide base and the screw screw body; a clutch actuating body that is rotatable with respect to the peripheral inner wall of the recess via a bearing and has a conical surface at one axial end capable of engaging with the conical inner peripheral surface of the screw threaded body; and the slide. By moving the clutch actuating body along the extension direction of the slide keyway in a manner that allows the rotation of the clutch actuating body, the conical surface of the clutch actuating body is moved by the screw acid. The clutch actuating body is engaged with the conical inner circumferential surface of the screw body to couple the clutch actuating body with the screw acid screw body, or the conical surface of the clutch actuating body is engaged with the conical inner circumference of the screw acid screw body. an air clutch actuating mechanism for separating the clutch actuating body from the screw acid screw body by separating the clutch actuating body from the surface; and a control means for controlling energization/deenergization of the air clutch and the air clutch actuating mechanism. A drive device characterized by: 2. The drive device according to claim 1, wherein the clutch actuating body is slidably key-fitted directly into the slide keyway, and is coupled to the slide base via a needle bearing. 3. The clutch actuating body is slidably keyed into the slide keyway and slidably keyed into the spline shaft coupled to the slide base via a bearing in the axial direction of the screw shaft. A drive device according to claim 1.