JPH0318742Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a fixing device for removably fixing, for example, a leg support, which is an accessory of an operating table, to a fixed frame of an operating table.

(b) Conventional technology Conventionally, this type of fixation device has been made of a sphere (ball).
There is a spherical fixation device that utilizes this.The structure is shown in Figure 4. A is a fixed side cylindrical case that is fixed to the fixed frame (not shown) of the operating table, and screws N are installed on the outside. A spacer C is slidably inserted inside the spacer C.

On the other hand, B is a cylindrical case that is removably screwed onto the screw N of the case A, has an opening at the upper part, and a sphere D is held between the spacer C and this case B. The sphere D is integrally attached with an accessory such as a support rod F of a support device.

The threaded part of the operating handle E is screwed into the case A from below, and when the handle is rotated and the spacer C is urged upward, the sphere D is clamped between both cases and fixed to the case A ( restraint). When handle E is loosened, spacer C is displaced downward, sphere D is released from both cases A and B, and support rod F is also free to tilt, so support rod F can be removably fixed and held. .

By the way, when this type of fixed instrument is used as an operating table device, it must be a rust-free device.
Stainless steel materials (SUS materials) are used for this purpose, but conventionally both cases A and B are engaged by threaded connection, and case B in particular has the drawback that it is difficult to machine as it has a large diameter thread. are doing. SUS
Machining large-diameter screws from materials is labor-intensive and costly.

In addition to the technique shown in Fig. 4, there is a technique for clamping and fixing a sphere in this way, as well as
-38217 ``Tripod'' and Utility Model Publication No. 56-7998 ``Drum fixing device,'' but the former is inconvenient to disassemble and reassemble, and the sphere cannot be loosened when assembled, and the latter has the disadvantage that the certainty of fixation is low. Therefore, it is not practical as a fixture for small parts.

(c) Purpose The present invention provides a spherical fixing device that has a simple structure, reduces processing costs, is easy to disassemble and assemble, is easy to operate, and can be securely fixed regardless of the material of the case. That is.

(d) Structure The fixing device of the present invention is characterized by the way the two cases are connected, but instead of using a screw method, they are engaged using locking teeth protruding at equal intervals around the circumference. That is, both cases are provided with locking teeth that mesh with the engaging cylindrical portions, and each tooth is tapered in the direction of the cylinder axis, so that when they are joined, the tapered surfaces are joined to ensure a strong joint. It is configured to be carried out. Further, it is configured to ensure the fixation and release of the sphere from the case.

(E) Embodiment FIG. 1 is a vertical cross-sectional view of the fixing device, and FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1. Moreover, FIG. 1 shows a BB cross section in FIG. 2.

In the figure, reference numeral 1 denotes a stationary side case, which has a cylindrical shape, and is fixed to a fixed frame (not shown) of an operating table through a mounting hole 1T through which a mounting bolt (not shown) or the like is passed. 2 is a cylindrical case that is engaged with and combined with the cylindrical part of case 1, and there is a support rod 4 in the center.
A through hole 2H is drilled to pass through.

Reference numeral 3 denotes a sphere housed in the cylindrical inner hole 1N of the case 1, which is releasably held under pressure by the combination of the cases 1 and 2, as will be described later. This sphere 3
A support rod 4 is integrally attached to the. 5 is a spacer inserted into the cylindrical inner hole 1N of the case 1;
It is interposed between the inner end of a screw rod 6N extending through the case 1 and the sphere 3. By operating the handle 6 that is integrated with the screw rod 6N, the sphere 3 is squeezed through the spacer 5, and the spacer 5 is formed with an annular engagement tooth 5K, which locks the sphere 3 in an annular manner. I'm starting to do that. The rotation of the handle 6 causes the spacer 5 to be vertically displaced by the screw feeding mechanism, and when the spacer 5 is displaced upward, the spherical body 3 is clamped between the cases 1 and 2. In this case, both cases 1 and 2 must be connected to each other. The sphere 3 is firmly fixed by the annular engagement tooth 5K of the spacer 5.

Furthermore, the present invention is also characterized by the way in which both cases 1 and 2 are combined. That is, the cylindrical portions of both cases 1 and 2 are provided with engagement locking teeth 1K and 2K at equal intervals in the circumferential direction, respectively. In the illustrated example, locking tooth 1
There are three K and 2K each, so they are protruded at 120° intervals, and in case 1 they are protruded from the outer circumferential surface 1C, and in case 2 they are protruded inward from the inner circumferential surface 2N. .

This state is also clear from FIG. FIG. 3 is an exploded perspective view of each component of the fixture.

Both meshing locking teeth 1K, 2K are formed with tapered surfaces in the cylindrical axial direction, and the tapered directions of the respective tapered surfaces are formed in opposite directions so as to be face-to-face with each other.

The circumferential width of the locking tooth 1K of case 1 is that of case 2.
Therefore, in the combination of both cases 1 and 2, each locking tooth 1K and 2K is inserted between the locking teeth of the other in the cylindrical axial direction. are displaced and then rotated 120° in opposite directions. Then, the locking teeth on the opposite side are aligned in the same phase position, resulting in the state shown in FIGS. 1 and 2. In this combination, sphere 3,
A spacer 5 is interposed between both cases 1 and 2.

In the assembled state, when the handle 6 is operated to push up the spacer 5 via the screw rod 6N and urge the sphere 3 toward the case 2, the sphere 3 comes into contact with the inwardly tapered surface of the through hole 2H of the case 2, and further pushes the spacer 5 up against the case 2. 2 is forced upward and the locking teeth 1K and 2K come into contact with each other. When the handle 6 is further operated to rotate the screw rod 6N, the sphere 3 is engaged with both cases 1 and 2 by the engagement teeth 5K of the spacer 5. As a result, the sphere 3 is firmly fixed to the cases 1 and 2.
Therefore, the support rod 4 is fixedly held on the fixed frame.

In order to release (release) this fixed holding, it is sufficient to operate the handle 6 in the opposite direction to the above, and by this operation the clamping pressure of the sphere 3 is released and both cases 1 and 2 are released.
is released. By this operation, the support rod 4 can be freely tilted and set at a desired position and direction.

The fixing device of the present invention is not limited to the illustrated example, and various modified embodiments are possible. For example, in the illustrated example, the case 1 is fixed to a fixed frame or the like, but the case 2 side can also be fixed. The number of locking teeth provided on the cylindrical portion of the case 2 is not limited to three, but may be two to four. However, it is not desirable to have too many pieces because it becomes difficult to process. Furthermore, the material of each component is not limited to stainless steel, and can also be used for purposes other than fixing instruments for operating table equipment.

(F) Effects According to the present invention, the structure of both cases, which constitute the main parts of the fixing device, is simple and easy to process.No screw processing is particularly required, and any material can be easily processed and can be provided at a low cost. This can also be achieved by simply machining a cast article. Furthermore, it is easy to disassemble and assemble, which solves the inconveniences of conventional fixtures, and the fixation is strong and extremely practical. That is,
Both cases are connected by a combination of a taper and an engaging portion, and the engagement between the sphere and the case is also a type of taper, so the double taper ensures secure fixation. Moreover, the spherical body is securely clamped and fixed by the annular engaging teeth of the spacer. In particular, the combination of the meshing portions of both cases and the annular engagement teeth formed by the spacer ensures a high degree of certainty in fixing the sphere. In addition, it has the advantage that the release operation can be easily performed. As described above, it is superior to the conventional method in terms of structural simplicity, economy, reliability of fixing function, and ease of operation, and is easier to implement.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of one embodiment of the present invention, Fig. 2 is a sectional view taken along line A-A in Fig. 1, Fig. 3 is an exploded view, and Fig. 4 is a longitudinal sectional view of an embodiment of the present invention.
The figure is a longitudinal sectional view of a conventional fixing device. 1, 2... Case, 1K, 2K... Locking tooth, 1
C...Outer circumferential surface, 2N...Inner circumferential surface, 3...Sphere, 4
... Support rod, 5 ... Spacer, 5K ... Engagement tooth, 6
...Handle, 6N...screw rod.

Claims (1)

[Scope of utility model registration request] One of the cases is fixed to a fixed frame.A part of one of the two cylindrical cases is fitted inside the other, and a sphere is releasably held under pressure inside the fitting part of both cases. In a fixing device that releasably fixes a member integrally attached to the sphere to the fixing frame, the inner side of the screw rod extending through the cylindrical inner hole of one case. A spacer having annular engagement teeth for locking the sphere is interposed between the end and the sphere, and
The inner circumferential surface of the fitting cylindrical portion of one of the cases and the outer circumferential surface of the fitting cylindrical portion of the other case are spaced at equal intervals in the circumferential direction and are oriented in opposite directions with respect to the cylinder axis direction. Forming a plurality of tapered locking teeth that can mesh with each other, both cases can be detachably combined by displacement in the direction of the cylinder axis and displacement in the rotational direction, and can be assembled into a spherical shape by operating the handle integrated with the screw rod. A spherical fixing device characterized in that a member integrated with a spherical body can be releasably fixed by compressing or releasing the spherical body.