JPH01266397A - Up and down moving pedestal - Google Patents

Abstract

PURPOSE:To restrain the occurrence of vibration and noise by keeping a movable support body in the floating state of non-contact with a fixed support body and at the same time, providing super electroconduction magnets and propulsion guide coils which give propulsion in an up and down direction. CONSTITUTION:A super electroconduction linear motor moving in propulsion a movable support body 3 in an up and down direction, is made up of both of super electroconduction magnets 10 and propulsion guide coils 8 provided relatively in opposition on the side of a fixed support body 2 and on the side of the movable support body 3. The movable support body 3 can be kept in the floating state of non-contact with the fixed support body 2 and moved up and down to any height position along the fixed support body 2 and also kept still at any position moved up or down, by means of the repulsive force or magnetism of the mutual magnetic field acting on a space between the super electroconduction magnet 10 and the propulsion guide coil 8, through the control of electrification against the linear motor.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention is applicable to image pickup devices such as television cameras, still cameras, movie cameras, video devices such as L monitors, and other desired devices, objects, and members. This invention relates to a vertically movable pedestal that supports a pedestal, moves the mounted object up and down, and holds it stationary at a desired height within the range of vertical movement of the device.

(Prior Art) For convenience, the vertically moving pedestal of a television camera will be described as an example.

FIG. 4 is a schematic diagram of the configuration of a one-down moving bezel of a conventional television camera. 21 is a pedestal with casters from Bedistal,
Reference numeral 22 denotes an outer cylindrical column fixedly erected on the pedestal, and 23 an equal tension spring fitting 2 fitted approximately concentrically into the outer cylindrical column.
1 lower i'fV with weight supported by I24! h, an inner cylindrical support; 25 is a vertically movable anti-friction roller of the inner cylindrical support; 26 is a pan head provided at the upper end of the inner cylindrical support; a television camera C is mounted and supported on this pan head; 27 is an operation handle.

The full weight of the vertically movable side, that is, the inner cylindrical column 23. Pan head including 2 operation handles 26. The entire weight of the TV camera C mounted on the pan head is supported, and this entire! By maintaining the balance between the amount of i and the supporting force of the equal tension spring device 24, the inner cylindrical column 23, which can be moved up and down with a slight force, and therefore the television camera C, can be moved up and down as desired within the vertical movable range of the column. It is designed to come to rest at a height of .

(Problems to be Solved by the Invention) However, the above-mentioned vertical motion bedistal has the following problems.

(1) Something that requires a large number of equal tension springs and is mounted on the bedistal! & Appropriate number of them by quantity: III
The mechanism has become complicated.

(2) Problems with weight and size remain due to the complexity of the mechanism.

(3) Problems such as vibration, noise, durability, and environmental resistance occur due to the presence of contact and sliding parts between the cylindrical columns on the fixed side and the movable side.

The present invention provides this type of vertically movable pedestal that solves the above-mentioned problems.

(Means for Solving the Problems) The present invention includes a fixed column which is erected and supported by a seat body, and which is fitted inside or outside the fixed column and can freely move downward along the fixed column. The aI movable strut body with the upper end side as the HSI & equipment R part is relatively provided facing the fixed strut body side and the movable strut body side, and the movable strut 41 is suspended in a non-contact floating manner with respect to the fixed strut body. It is a vertical motion bedistal that has a superconducting magnet and a propulsion guide coil that maintains the current state and provides propulsion force in the vertical direction.

(Function) In other words, the superconducting magnets and the propulsion guide coils, which are relatively provided opposite to each other on the fixed column side and the movable column side, together constitute a superconducting linear motor that propels and moves the movable column body in the vertical direction. Fully energize the linear motor
By this, the movable column is brought into contact floating state with respect to the fixed column by the repulsion or attraction of the mutual magnetic field acting between the superconducting magnet and the propulsion guide coil, and is moved up and down to any height position along the fixed column. It can also be held stationary at any desired height position by moving it up and down. That is, the GA object mounted and supported on the upper end side of the movable strut body can be moved up and down to any height position within the movable range along the fixed strut body of the movable strut body, and can be held stationary at that height position.

As mentioned above, the movable column is driven to move up and down along the fixed column in a non-contact floating state, and can also be moved up and down to any desired height position while remaining in a non-contact floating state. The contact area between the two pillars is held stationary at m! I
There is no Iw, therefore, vibration and noise are generated due to mutual contact and sliding between the fixed body side and the movable body side during the vertical movement process of the movable body, and durability and durability are reduced. Problems such as environmental resistance are resolved. The use of lubricants becomes unnecessary.

Even if the load is heavy, sufficient vertical propulsion force and stationary holding force can be secured, and the mechanism is simpler than that using a constant tension spring device, resulting in the overall small size of BEDISTAL. It becomes possible to reduce part costs and manufacturing costs.

wAe/Standing is controlled by electrical signals.

It becomes easier to control responsiveness, operability, and taste, improves stationary accuracy, and becomes a remote control or IT notepad.

(Example) Fig. 8R1 shows a schematic diagram of the configuration of a pedestal according to an embodiment, and this example is a vertically movable pedestal for a television camera.

2 is an enlarged cross-sectional view taken along line B--B in FIG. 1, and FIG. 3 is a vertical cross-sectional view taken along line C--C in FIG.

1 is a pedestal with casters serving as a pedestal seat; 2 is a cylindrical outer cylinder as a fixed support supported upright on the pedestal; 3 is a cylindrical outer cylinder that is approximately concentric with the inner circumferential surface of the outer cylinder; A cylindrical inner cylinder serving as a lower L movable column is fitted with a gap in between, and reference numeral 4 is a pan head provided at the upper end, on which a television camera C is mounted and supported. 5 is an operating handle.

6, 6, and 6 are the guide members 3 (1) disposed on the outer cylinder side. Each guide member is a vertically long plate material with a straight guide groove 7 along the yam inside. A guide concave groove 7 is formed on the peripheral wall of the outer cylinder 2 at three positions in the circumferential direction in the direction of the generatrix of the outer cylinder.
By fitting with the side facing inside, it can be integrally attached to the outer fli2. Propulsion guide coils 8, 8 are integrally disposed along the length of each of the longitudinally extending guide grooves on both sides of the groove.

Reference numerals 9, 9, and 9 are guide protrusions provided on the outer circumferential side of the interior 3 in the direction of the inner cylinder generatrix at three locations in the circumferential direction at approximately 120" intervals, and on both sides of each guide protrusion, there are guide protrusions along the longitudinal direction. The superconducting magnets 10 are integrally provided.

Then, the inner 1113 having the above structure is made to engage the three guide protrusions 9, 9, 9 on the outer side with the three guide grooves 7, 7, 7 on the inner side of the outer oil 2 having the above structure, so as to form an outer cylinder. 2, and the inner line 113 is freely movable in the vertical direction within the outer taz by the guide concave grooves and guide protrusions 7, 9.7, 9.7, and 9 that are engaged with each other. . In addition, the propulsion guide coils 8, 8 on the side of each guide groove 7 and the superconducting magnets lO on the side of the guide protrusion 9, which are engaged oppositely with the guide grooves.
10 are in a mutually opposing relationship. Incidentally, the outer cylinder 2 and the inner cylinder 3 in FIG. 1 are shown in a longitudinally developed cross section of the A-AkQ portion in FIG. 2.

The opposing pairs 8.1O of propulsion guide coils and superconducting magnets on the outer cylinder side and the inner side respectively propel the inner cylinder 3, which is a movable body, in the vertical direction relative to the outer cylinder 2, which is a fixed body. It constitutes a superconducting linear motor section, and since this linear motor section is located at three locations at approximately 120° intervals in the circumferential direction of the outer cylinder and inner cylinder, each linear motor section is The inner cylinder 3
In the outer cylinder 2, it can be maintained in a floating state by being positioned substantially concentrically with the outer cylinder without contacting the inner circumferential surface of the outer cylinder. Alternatively, each linear motor section is electrically controlled so that the inner tube 3 is held floating within the outer tube 2 so as to be positioned substantially concentrically with the outer tube without contacting the inner circumferential surface of the outer tube.

In addition, each linear motor section 8.
The movable inner cylinder 3 is moved upward or downward with respect to the outer cylinder 2 while maintaining a floating state without contacting the inner circumferential surface of the outer cylinder by the propulsive force generated at lO.

In other words, the TV camera, which is a mounted object mounted and supported on the pan head 4 on the upper end side of the cylinder, is moved upward and downward along the outer cylinder 2 of the inner cylinder 3.
It can be moved up to any height within the range and held stationary at that height.

Reference numeral 11 denotes an energization control box for each linear motor section 8, 10, which is placed at an appropriate location such as the base 1 or the outer base of the outer cylinder 2. 12 is a switch box communicating with the energization control box. In this example, the switches 12a and 12b in the switch box 12 are switched by moving the operating handle 5 around the spindle 5a, and by switching the switch, the energization control box A control circuit in the inner cylinder 11 is controlled to control the vertical movement direction and the vertical movement speed of the inner cylinder 3, which is a movable support column. A position sensor such as a potentiometer may be placed inside the switch box 12 to perform position control.The remote box 13 can be electrically connected to the energization control box 12 via the coat 13a.
! ! Inner cylinder 3, which is the IITfh pillar of Bediskuru,
It is also possible to remotely control the vertical movement of the

In this embodiment, the propulsion guide coil 8 is placed on the inner cylinder 3 side which is the movable column body, and the aX guide magnet 10 is placed on the outer tube side which is the fixed column side.
It may be arranged on the 42 side to constitute a linear motor part.The inner cylinder 3 may be a fixed support and the outer cylinder 2 may be a moving support.Outer jJ2 and inner n3 are not limited to cylindrical shapes. The angles M or the like may fit loosely into each other, and the inner movable or fixed struts may be solid bodies.

The linear motor section consisting of the propulsion guide coil 8 and the superconducting magnet lO is not limited to the circumferential direction of 120 @ 3 sets at intervals as in the embodiment, but may be 3 m or more, or may be composed of 2 sets of 1806 facing each other. be.

A pair of linear motor units may be provided as the vertical motion propulsion drive source.

(Effect of the invention) As described above, the vertically movable pedestal of the present invention.

The movable strut body is driven to move up and down along the fixed strut body in a floating state without contacting the fixed strut body.

It is held stationary at any height position by moving up and down in a non-contact floating state, and there is no contact or sliding part between the two pillars, so it is different from the conventional one using a constant tension spring device. Problems such as mutual contact between the fixed body side and the 6r moving body side during the vertical movement of the movable body, generation of vibration and noise due to WJ movement, and durability and environmental resistance are solved. The use of lubricants becomes unnecessary.

Even if the load is heavy, sufficient vertical propulsion force and stationary holding force can be secured, and the mechanism is simpler than those using equal tension spring devices, making the pedestal smaller overall. It becomes possible to reduce the weight, parts cost, and manufacturing cost.

To control driving and stopping using electrical signals.

It makes it easier to control responsiveness, operability, and taste, and improves stationary accuracy. Remote control becomes possible.

4. Explanation of 1111 width of 14th page 1st UA is a schematic diagram of the configuration of an embodiment of bedistal, 21st g
312 is an enlarged cross-sectional view taken along the line B-B in FIG. 1, 312 is a vertical cross-sectional view taken along the line C-C of the second UA, and FIG. It is.

1 is a pedestal, 2 is a fixed outer cylinder 43 is a movable inner cylinder, 4 is a pan head, 5
is the operation handle, C is the TV camera as a mounted object, 8
・Propulsion guide coil and superconducting magnet that make up the lO beam near motor section.

Claims (1)

[Claims] (1) A fixed column that is erected and supported by a seat body, which is fitted internally or externally to the fixed column and can move up and down freely along the fixed column, and is movable with the upper end as the mounting part for the loaded object. a superconducting magnet, which is provided relatively opposite to the fixed column and the movable column, keeps the movable column in a floating state in a non-contact manner with respect to the fixed column, and provides a propulsion force in the vertical direction; A vertically moving pedestal having a propulsion guide coil.