JPH02186695A - Picture visualizing turning gear at angle of 360 degree - Google Patents

Abstract

PURPOSE: To prevent vibration from an image carrying drum and to reduce the loads on a motor, by connecting a motor only through a drive part to the image carrying drum. CONSTITUTION: Load separation between an image carrying drum 10 and a motor 3 is achieved by supporting the image carrying drum 10 on a needle 12a. The needle 12a is fitted to a conical bearing hole 21 of a plate 1a of the image carrying drum 10. A drive force transmission part is a part from the motor 3a through a motor shaft to a drive wheel 4a, and the drive wheel 4a is frictionally connected with a friction surface 17 of a tubular shaft projection 18 of the lower plate 1a through a friction lining 5a. The motor 3a is connected to a torque control part 11 through a lead wire 32 along with a braking device 15. The torque control part 11 increases power supply to the motor 3a at the time of starting automatically or by a handle 33 and controls the reduction or change in a rated operation. Thus, the transmission of the vibration of the drum to the motor is reduced or eliminated, and the motor becomes convenient for a continuous operation.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a 360° angle image visualization rotation device. Even more particularly, in order to prevent vibration transmission from the image carrying drum and to reduce motor load, the motor is engaged with the image carrying drum only via the drive. The drive part is, for example, a drive wheel or a rubber
Metal fittings are fine. Suitably, the motor is connected to an electric rotational torque control which allows the rotational torque to be increased during starting. A braking device may also be provided for sudden stopping of the drum. In this case, the motor can preferably be switched to a load resistance during generator operation.

The present invention relates to a rotation device according to the preamble of claim 1. This type of device is described in European Patent Publication No. 20828
It is disclosed in No. 3. The European patent application and P
CT/CH8810OO98 and its Swiss Patent Application "Omni-directional display of 360° angular planar images" is considered as disclosed for the purposes of this specification.

European Patent Publication No. 208283 shows the principle of the device, while PCT/CH38100098 describes a second refinement and specification of the grid. This Swiss patent application concerns an improvement to a light source.

BACKGROUND OF THE INVENTION Several known devices corresponding to the preamble of claim 1 are highly effective with respect to the already implemented technical improvements corresponding to the originally mentioned patent application. However, there are problems in driving the image carrying drum.

The relatively high rotational speed of the rotating image-carrying drum and the resulting vibrations can cause damage to the bearing parts of the motor, especially during continuous operation.

Balancing the image carrying drum may be difficult. This is because at rotational speeds above 1500 revolutions per minute the material (for example Plexiglas) deforms to some extent and therefore conventional equilibrium limits cannot completely eliminate vibrations.

Particularly with relatively large drums, the starting moment of inertia indicates that the motor must be made substantially larger than is practically necessary for continuous operation. In fact, a considerable amount of energy is required during continuous operation. This is because image carrying drums are generally well supported and therefore experience essentially only support resistance.

[Problems to be Solved by the Invention] An object of the present invention is to provide a rotating device with a motor. In this device, the transmission of vibrations from the image carrying drum to the motor is reduced or eliminated, and the motor can be conveniently designed for continuous operation so that it can be virtually tuned to the rated speed and for starting operation. The above object is achieved in a satisfactory manner by the features of claim 1, without the need for particular oversizing. By applying a light initial shock during startup, the starting inertia, which is at its maximum when the speed is zero, can be overcome. The drive transmission unit according to the present invention includes a motor and an image transmission unit.
Any rotatable component that interrupts, inhibits or at least reduces direct vibration transmission between the carrying drums and that slightly moves the drum associated with the motor. For example, flexible shaft couplings, gears, gears, drive wheels, etc. are conceivable.

Various additional improvements are possible from the other embodiments and variants described in the dependent claims.

Owing to the features of claim 2, it is possible to isolate vibratory forces acting radially relative to the axis of rotation from the motor particularly quickly and, furthermore, the transverse configuration allows for a reduction in height so that the device can be constructed relatively flat.

The variant according to claim 3 is characterized by a simple structure and incorporates a so-called slip clutch. This slipping clutch is placed between the friction surface and the drive wheel to provide some degree of slippage. Furthermore, the motor characteristics can be optimally adjusted by deforming the shaft protrusion in the radial direction and deforming the drive wheel radius.

If the drive wheel is provided with a friction-enhancing lining as claimed in claim 4, it is advantageous to provide a further slipping clutch between the motor shaft of the drive motor and the drive wheel, in which the lining is It can reduce noise and driving noise. In this case, suitable slipping clutches may take the form of various known joints. For example, there are viscous clutches, magnetic couplings or simple friction-lined couplings, as well as conical or disc clutches.

The embodiment of claim 5 has been found to be advantageous by experiments, the actual rotational speed of the motor being unimportant. For example, DC motors are often substantially faster than asynchronous AC motors, but in some configurations they are also smaller;
Preferably used. 1 stated in the form of claim 5
The actual number of revolutions per minute is approximately 2000 to 3000 revolutions per minute. This is the optimum rotation speed. Naturally, lower values can be set corresponding to lower rotational speeds of the image carrying drum, but this may lead to blinking in the individual images. When attaching two images with their backs superimposed and composing a reflected light image, ftwo images mo
untedback to back and a r
reflected-1ight imagedesig
n) Even for still images, the above rotation speed can be halved.

Small motors that can be overloaded in a short period of time are advantageously combined by a variant of claim 6. A direct current motor with the characteristics according to claim 7 has proven particularly advantageous here. For example, increasing the voltage to the motor increases the rotational speed. In particular, regenerative braking control and/or rotational speed control is very easily possible with this method. Because of their small weight, they are easy to control, and in particular, DC motors with bell-shaped armatures can be used appropriately, at least if the device is not overly sized.

In conventional equipment, the motor simultaneously performs image carrying,
It has also been used as a bearing for the drum, which is disadvantageous for the purposes of the invention. In other words, this reduces the frictional forces and their losses.

However, according to the invention, the bearing having the features of claim 8 is particularly friction-free (and, in the embodiment of claim 9, thermally insulated between the rotary drive and the light source). This has the advantage that mutual heating of both critical elements of the device is reduced.

With the motor support according to the features of claim 8, the range of light incident on the image carrying drum can furthermore be made sufficiently large. This can be further extended by the following means.

When a completely transparent plate is used, a reflective coating is applied to the outer periphery of the root and the upper surface facing the grid. As a result, the entire surface of the lower surface of the plate becomes a light incident surface. Due to total internal reflection on the reflectively coated surface, most of the light from the half plate with the reflective coating on the top surface is reflected onto the parts of the plate that are not reflectively coated, so this light also enters the space behind the film. According to a variant of claim 10, in which the number of image printers can be individually set and the film is deflected, the number of image printers can be set individually, with the addition of interference fluctuations due to intensity fluctuations of the light source, which is a number of times in the range of the rotational speed of the image carrying drum. Depending on the effect, the number of blinks will be further strengthened. In this state, the light from the light source is clearly weakened or darkened (dark phase) around the rotation axis of the image carrying drum, resulting in an additional light effect.
narrow fluence effe
ct) occurs. This effect is very suggestive and impressive, especially in the case of long-term exhibitions and small amplitude intensities of light intensity fluctuations, which is often welcomed by advertising professionals.

The braking embodiment is particularly advantageous for systems in which film replacement is frequent. Due to the rotational speed of the drum, it may take up to 1-2 minutes for the image carrying drum to come to a stop without a brake. In this case, a configuration known as a single frame mechanism for large cameras (for example 16 mm) can be used.

Embodiments Other features, advantages and modifications will become apparent from the detailed description of the drawings below. The invention is illustrated in more detail without being restricted thereto.

The drawings are drawn in relation to each other. Identical parts have the same reference numbers, and similar parts have the same reference numbers but different indexes.

FIG. 1 shows a schematic cross-section of the device in the image plane.

FIG. 2 is a cross section taken in a plane perpendicular to the cross section of FIG. 1, and shows an apparatus in which a light source is provided outside the image carrying drum.

FIG. 3 shows a detailed conduction section as a variation of FIG.

FIG. 4 shows a detailed device with a flexible joint.

An essential feature of the invention is the image carrying drum 10.
and morph 3. Motor 3 is dedicated to generating the rotational movement of image carrying drum 10, but must be separated from the weight of image carrying drum 10 and its vibrations. .

According to the embodiment of FIG. 1, this is accomplished by supporting the image carrying drum 10 on the needle 12a. The needle 12a fits into a bearing hole 21 in the plate 1a of the image carrying drum 10. The bearing hole 21 has a conical shape and is connected to the rotation axis 2 of the image carrying drum 10.
Centered on 2. Although the needle 12a is drawn like a crank relative to the rotating shaft 22, it is completely placed on the rotating shaft 22. The needle 12a is housed in an area facing away from the plate 1a of the housing. External housing 28
is transparent like the image carrying drum 10, and each includes a lower plate 29a and an upper plate 29b.

The support portion of the needle 12a is a journal bin portion 31 between both upper plates 1b and 21b. Alternatively, as shown in FIG. 2, another needle 12b may be used as a support portion.

The weight support part in FIG. 2 is formed by a ball 12c and a bushing (a 5tep b
Placed on earingl 30. A bushing 30a is provided on the opposite side of the lower plate 1d of the image carrying drum 10. As a possible variant, instead of one ball, the image-carrying drum 10 may be provided with a plurality of balls, which are rotatable in a circumferential groove on the underside of the plate 1d, facing It rolls out into the stationary groove.

Such a configuration is known for use in pivot support devices for swing cranes, unloading devices for ships, and the like.

The bearing in the variant of FIG. 4 is a magnetic floating bearing 27, which is fixed on the one hand on the periphery of the lower plate 1e and on the other hand on a bearing ring 26 fixed to the outer housing 28. The vertical and radial supporting forces are obtained by the magnetic force generated by the magnets of the magnetic floating bearing section 27. The opposing surfaces 25a and 25b have the same magnetic poles and repel each other, and the deformation transmission section shown in FIG. Through the lining 5a, the friction surface 1 of the tubular shaft protrusion 18
Frictionally connects with 7. The shaft protrusion 18 is firmly connected to the lower plate 1a or is formed integrally therewith. A slip ring 24 electrically insulated from each other is provided around this outer periphery, and its carbon brush 23 is placed opposite to said slip ring.

The carbon brushes 23 have blades, are electrically insulated from each other by a known method (not shown), and are fixed facing the outer housing 28. These are connected to a power source (not shown) for the light source 2a via lead wires not shown in detail. The light source 2a is inserted into the plate 1a and connected to the slip ring 24 via a current path (not shown).

The motor 3a has a torque control section 11 equivalent to the braking device 15.
is connected to via a lead wire 32. Torque control section 11
is controlled automatically or by a handle 33. The control unit increases the power supply to the motor 3a at startup, and controls its decrease or change during rated operation. During rated operation,
As already mentioned, only the supporting force must be coupled to the needle 12a or the journal pin portion 31.

The friction losses of the slip ring 24 are negligible and can be reduced by material selection, for example by increasing the silver content.

The variant of FIG. 2 is driven by a laterally mounted motor 3b fixed to the top plate 29c. The plate 29c has a corresponding cutout and, in particular, a slot 34 through the drive wheel. The driving wheel is firmly connected to the motor 3b and fitted onto the upper side of the plate IC. Drive wheel 4b and plate 1
There may be frictional sliding between c. This allows the motor to reach its RPM more quickly during startup, resulting in
The starting torque of the carrying drum 10 does not thermally overload the motor. Such a configuration is particularly used when the device is turned on and off frequently. The motor 3b is held in pressure contact with the plate IC by a spring 35. This spring 35 and preferably adjustable spring elasticity allow the degree of slippage to be varied. The spring 35 is supported within the sheet metal ceiling 36 of the outer housing 28.

The motor 3b and needle 12b are fixed to the upper plate 29c.

The distance between the rotation axis 22 of the image carrying drum 10 and the drive wheel 4b is multiplied by the radius r of the drive wheel 4b, and is determined by the desired rotation speed of the image carrying drum 10, preferably 2000 to 3000 revolutions/min in most cases. It is determined by multiplying this by the motor's rated rotation speed n.

The power supply to the motor 3b and the light source 2b will not be described in detail, but is obvious to those skilled in the art and depends on a special configuration.

A DC motor is particularly suitable as the lateral motor 3b.

The light source 2b in FIG. 2 is the image carrying drum 10.
and is provided as a concentric annular lamp around the bushing 30. The irradiated light 13 passes through at least one side of the transparent plate 1d and reaches the rear space of the film 14. The side walls 37 of this space are reflectively coated. If the plate 1d is completely transparent, a reflective coating is applied to the upper surface 39 and the peripheral edge 40 that contact the grid 38. This achieves perfect reflection of the light source 2b and optimum utilization of the light.

In the space at the rear of the light source 2a in FIG. 1, which is visible from the front, the side walls 37 are coated with a reflective coating in order to increase the light utilization efficiency and prevent light from going outside in the direction away from the film.

Behind the light source 2a in FIG. 1, the space visible from the front is provided with a reflective coating on the side walls 37 to increase light efficiency and prevent light from leaking outside in the direction away from the film. There is.

The drive section in FIG. 3 corresponds to that in FIG.

A slip clutch 8 is provided between the motor shaft 7 and the drive wheel 4b to provide slippage at the time of starting, thereby reducing wear and tear on the lining 5b on the drive wheel 4b.

The motor 3c is supplied with power via the rotation speed setting section 41,
The external connection is connected to a braking device 15 with a load resistor 16 .

When the motor 3c is disconnected, the braking device 15 automatically switches the motor to the load resistor 16 during generator operation, so that the motor is electrically braked. The electrical configuration of the rotation speed setting unit 41 and the braking device 15 is obvious to those skilled in the art, and therefore will not be described in detail, but normal reverse current braking may be used. In this case, the motor is provided with counter-rotating torque until it reaches a minimum speed, eg, stationary state. Mechanisms of this type have already been proposed in the motion picture technology for stopping the shutter at a precise position.

In FIG. 3, a siren plate 19 having an opening 20 centered around a rotating shaft 22 is shown. This has a relatively high rotational speed and causes the air to vibrate and generate sound. The aperture 20 has tongues 9 that create appropriate air turbulence. Rotation speed setting section 4
1 may be configured to automatically change the rotation speed so that the sound from the plate 19 plays a melody. Plate 19 is preferably rotatably coupled directly to the image carrying drum below plate l, not shown.

Its shaft 42 serves as a support for the image carrying drum. On the other hand, rotation of such a plate can also be used to generate cold air for heat removal from the light source as well as the motor, in which case ventilation vanes are provided instead of the tongues 9.

The modification shown in FIG. 4 is driven by a motor 3d installed through the lower part of the image carrying drum 10 and centered on the rotating shaft 22. The motor shaft 7a is coupled to the plate 1e of the image carrying drum 10 via an elastic joint 4C. The elastic joint 4c is, for example, a rubber/metal joint. The side of the joint 4c that contacts the plate is either directly fixed to the plate 1e or coupled to the plate 1e via an intermediate portion (not shown).

Vibration of image carrying drum 10 is suppressed or reduced by coupling 4C. The weight of the drum 10 is supported by the magnetic floating bearing portion 27 as described above. Instead of the magnet floating bearing section 27, a ball bearing or a slide bearing may be provided. Furthermore, on the drive side, in front of the joint, a mechanical filter in the form of a rocker may be provided in order to dampen vibrations. This rocking body is separated when stopped.

Another possibility is an electronic filter using a speed control circuit, which includes a speedometer generator connected to the image carrying drum.

[Effects of the Invention] The present invention provides that the transmission of vibrations of the image carrying drum to the motor is reduced or eliminated, and the motor can be conveniently designed for continuous operation so that it can be substantially tuned to the rated speed; There is no need to particularly oversize it for start-up operation.

Furthermore, vibratory forces acting radially with respect to the axis of rotation can be separated from the motor particularly quickly, and, furthermore, the transverse configuration reduces the height so that the device can be designed relatively flat.

Furthermore, the motor characteristics can be optimally adjusted by deforming the shaft protrusion in the radial direction and deforming the drive wheel radius.

Furthermore, if the drive wheels are provided with friction-enhancing linings, it is advantageous to provide a separate slip clutch between the motor shaft of the drive motor and the drive wheels, in which case the linings provide noise reduction as well as driving noise reduction. obtain.

Furthermore, the bearing has the advantage of being particularly friction-free and thermally isolated between the rotary drive and the light source. Mutual heating of both critical elements of the device is thereby suppressed. Furthermore, the motor bearing allows the plane of light incidence on the image carrying drum to be sufficiently large.

[Brief explanation of the drawing]

FIG. 1 shows a schematic cross section of the device in the image plane, and the second
The figure shows a cross-section taken perpendicular to the cross-section of Figure 1, and shows a device with a light source provided outside the image carrying drum;
The figure shows a detailed conduction section as a modification of figure 2;
The figure shows a detailed device with a flexible shaft joint. la, d, e, d image carrying drum 1
0 lower plate lb c image carrying do 2a
b 3a, b, c. 4a, b,, c 5a, b 7, 7a Upper plate of ram 10 light source d Drive motor drive wheel, elastic joint lining surface motor shaft sliding clutch tongue image carrying drum rotation torque control part needle or pole irradiation light film braking Device load resistance friction surface shaft protrusion siren plate 25a, b 29a, b. 0a Open bearing hole Rotating shaft Carbon brush Slip ring Surface bearing ring Electromagnetic floating bearing section External housing Housing 28 plate Bushing Journal Bin section Lead wire handle Slot Spring Ceiling Drum side wall grid Upper surface Surrounding side wall Rotation speed setting section Axis of siren plate 19 Engraving of the drawings (no changes to the contents) KenFig, 2 Procedural amendment (Hogen December 26, 1999)

Claims (10)

[Claims] (1) a drum bounded at least at one end by a plate, the drum being rotatably arranged around a main shaft, directly abutting the film inside the drum, a light source, a drive motor having a shaft and the plate; A 360° image visualization rotation device characterized in that it has a drive member and said axis is disposed substantially perpendicular to said main axis. (2) 36 according to claim 1, characterized in that the motor is provided centrally spaced and preferably laterally;
Image visualization rotation device with 0° angle. (3) The 360° angle image visualization rotating device according to claim 1 or 2, wherein the plate has a rigid shaft protrusion having a friction surface that can directly contact the drive wheel. (4) The drive wheel has a friction-enhancing, preferably soft, noise-damping coating, and the drive wheel is directly coupled to the plate surface and, when necessary, connects the motor shaft of the drive motor with the drive wheel. Claim 1 characterized in that a slipping clutch is provided between the
4. The 360° angle image visualization rotation device according to any one of items 3 to 3. (5) The drive wheel touches the plate at a distance (a) from the axis of the image carrying drum, and the distance (a) is the drive wheel radius (r) according to the formula ^n_m_·_r/rpm.
, where rpm is the image carrying speed.
36. 36 according to claim 3 or 4, characterized in that the desired rotational speed of the drum ^n_m is the rated rotational speed of the motor and the distance (a) preferably corresponds to the drive wheel radius (r).
Image visualization rotation device with 0° angle. (6) The motor is connected to an electric rotational torque controller capable of increasing the rotational torque during starting and/or has a braking device for sudden stopping of the drum, and preferably the motor is driven by a generator. 5. 3 according to claim 1, characterized in that it is sometimes switchable to a load resistance.
Image visualization rotation device with 60° angle. (7) The motor is a DC motor, and has a rated voltage (
Um) and rated rotational speed (^n_m) can be reduced by approximately half by the rotational torque control unit after starting, and the rated rotational speed is halved.
The 360° angle image visualization rotation device according to claim 6, characterized in that (^n_m/2) is preferably 2000-3000 revolutions/min. 8. 360 according to claim 1, characterized in that the image carrying drum is supported concentrically on a needle or ball at one end and the motor is arranged at the other end. Image visualization rotation device with angle of °. (9) A light source is provided at the end of the drum that is deflected by the motor, and at least one side of the plate adjacent to the light source is transparent so that the irradiated light preferably passes through the film. 8. The 360° angle image visualization rotation device according to claim 8. (10) The number of rotations (^n_m) of the motor can be adjusted manually and/or by program control, and when necessary, a sound generation device is provided on a siren plate that can be rotated together. 10. A 360° image visualization rotation device according to any one of claims 1 to 9.