JPS5814319Y2 - Support drive mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a support drive mechanism for moving a supported body in the vertical or horizontal direction.

Conventionally, when an X-ray tube or the like is supported and moved vertically in an X-ray tube support device, for example, a lead screw 1 that is rotationally driven by a drive source (not shown) is used, as shown in FIG. Generally, a mechanism is used to vertically drive a holder 3 that integrally fits and holds a nut 2 that engages with the holder 3.

In this case, the supported body 4 such as the X-ray tube is held in the holder 3.
The holder 3 is supported by a roller 5 provided thereon in contact with a traveling guide 6, and is supported by the traveling guide 6 so as to be slidable in the vertical direction.

In such a device, since the mechanical relationship is extremely unbalanced, for example, the nut on the holder 3 or the lead screw 1 may be damaged due to warpage, deflection, or inclination of the lead screw 1 or the running guide 6. The holder 3 and the nut 2 may
, there are problems in that excessive force is locally applied to these fitting parts, causing noise in these parts and causing wear to the lead screw 1, nut 2, holder 3, etc. Ta.

In other words, the longer the lead screw 1 is, the greater the warpage, deflection, etc., will occur, and the parallelism with the running guide 6 cannot necessarily be adjusted correctly when installing the lead screw 1.

Therefore, in the past, it was necessary to spend a lot of time managing and adjusting the lead screw 1 and installing the holder 3, and even if this was done, there would be effects such as changes over time, and the noise and wear would be reduced. I couldn't escape completely.

This invention was developed based on these circumstances.
The purpose of the present invention is to provide a support drive mechanism that can ease the conditions for adjustment, parts management, etc. for mounting each component, and can effectively prevent noise, wear, and the like.

That is, a feature of the present invention is that a means for allowing the support member to tilt and rotate with respect to the slide movement direction is interposed between the support member that supports the supported object and the drive transmission mechanism.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 2 shows an embodiment of the present invention, and the same parts as in FIG. 1 are given the same reference numerals and detailed explanation thereof will be omitted.

That is, in this embodiment, a spherical bearing 7 is interposed between the nut 2 and the holder 3 to allow the holder 3 to tilt and rotate with respect to the nut 2.

Although not clearly shown in the figure, the spherical bearing I and the nut 2 are connected to the lead screw 1 with respect to the holder 3.
Appropriate anti-rotation means are provided to prevent rotation in the direction of rotation.

With this configuration, when the holder 3 travels on the travel guide 6 due to the rotation of the lead screw 1, even if the nut 2 changes its tilt with respect to the holder 3 due to deflection of the lead screw 1, etc. Also, holder 3
Even if the inclination changes with respect to the nut 2 due to unevenness of the traveling guide 6, the inclination is allowed while the nut 2 and the holder 3 are always in contact with each other over a wide surface by the spherical bearing 7, and the holder 3 has no support for this inclination. Since this is mainly carried out by the traveling guide 6, no excessive force is applied to any part, and no noise is generated.

In other words, this means that there is no need to pay much attention to warpage and deflection of the lead screw 1, the inclination of the lead screw 1 during installation, the state of the running surface of the roller 5, that is, the surface of the running guide 6, and the installation of the holder 3. This means that there is no need for subsequent adjustments to noise or replacement of the nut 2 or holder 3 due to wear.

Therefore, it also improves work efficiency and ensures ease of cutting.

The present invention is not limited to the embodiments described above and shown in the drawings, but can be implemented with various modifications without changing the gist thereof.

For example, in the above embodiment, the spherical bearing 7 is used to allow tilting rotation, but if there is no need to allow tilting rotation in a particularly wide range of directions, the tilting rotation that should be allowed can be changed. A normal bearing whose axis is in the axial direction of the nut 2 may be interposed between the holder 3 and the nut 2.

Further, the driving force transmission mechanism may be a mechanism other than the mechanism using the lead screw 1.

Furthermore, the same method can be applied even when the sliding direction of the supported object is not the vertical direction but the horizontal direction.

As described above, according to the present invention, it is possible to provide a support drive mechanism that can ease the conditions for adjustment, parts management, etc. when installing each component, and can effectively prevent noise and wear. can.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part showing the structure of a conventional device, and FIG. 2 is a sectional view of a main part showing the structure of an embodiment of the present invention. 1...Lead screw 2...Nut, 3...Holder, 4...Supported body,
5...Roller, 6...Travel guide, 7
・・・・・・Spherical bearing.

Claims (1)

[Scope of utility model registration request] A holder 3 that supports a supported body 4 is arranged so as to be slidable relative to a guide member 6, and a driving force transmission member 1 that is disposed in the sliding direction and that slides the holder 3 is attached to the holder 3. In the support drive mechanism in which the holder 3 and the drive force transmission member 1 are fitted together,
A support drive mechanism characterized in that tilting rotation permitting means 2 and 7 for permitting tilting rotation of the holder 3 with respect to the slide movement direction are interposed in the fitting portion with the holder.