MOUNTING DEVICE

Abstract

 The subject of the invention is a mounting device applicable in particular to operating table tops. The mounting device comprises an active part (1) made of a deformable, thin-walled material and a passive mounting part (2). Said active part (1) consists of two opposite situated arms connected at one end with a yoke, so that there is a gap between the arms, and whereby the arms (3) and the yoke (4) are gas-filled and internally connected spatial cavities (6). The ends of arms (3) and yoke (4) are sealed with elastic bottoms (7). The arm (3) or yoke (4) is fitted with a stub pipe (8), with which gas is either pumped into the cavities (6) or pumped out. A passive mounting part (2) is fitted to the arms (3).

Description

[0001] The subject of the invention is a mounting device applicable in particular to operating table tops.

[0002] The mounting device for quick assembly and disassembly, especially for operating tables, is known from the publication of patent application CN103126847 A. The device includes a clamping block, a rotary clamping block, a locking sleeve, a knob and a knob handle, the locking sleeve being additionally equipped with a locking bar and the front part of the locking bar being equipped with an internal thread. The centre of the bar is provided with a through hole going up and down and the rear part of the locking bar is connected to the fixed block by a spring and have a groove below the rear part of the locking bar and the convex part is placed on the lower side of the rotary clamping block. The upper side of the rear part of the block is provided with a rear curved part that passes through the groove and the upper block is positioned between the rotating clamping block and the locking sleeve under the groove.

[0003] However, the description of patent application CA2688876 (A1) reveals a card holder, e.g. an identification card, containing two holding arms connected with a yoke to each other and defining a card slot between them. In order to be able to hold also cards of different thicknesses with the appropriate holding force by means of a clamp, at least one of the two holding arms is equipped with a pressure pad that bulges, at least in some sections, towards the opposite holding arm. The pressure pad shall be made of a different material than the material of the holding arms.

[0004] The publication of patent application GB1277071 shows a fixing device consisting of a component welded to a bracket, which is placed in a U-shaped elastic clamp hole.

[0005] The aim of the invention is to propose a solution for a mounting device that enables quick and easy assembly and disassembly, especially applicable in mounting various components into operating tables. These can be, in particular, different types of supports for upper or lower limb operations, or adapters for the assembly of e.g. drip stands, surgical instrument trays or any other holders for surgical tubes, medical device electrical wires, etc.

[0006] The essence of a mounting device consisting of an active part made of a deformable, thin-walled material and made of two opposite arms connected with a yoke at one end, so that there is a gap between the arms, is that, the arms and the yoke are made as gas-filled and internally connected spatial cavities, with the ends of the arms and the yoke sealed with bottoms. The arm or yoke is also equipped with a stub pipe which is used to pump gas into the cavities. The passive mounting part of the device is mounted to the arms. The clamping of the passive mounting part, constituting e.g. a limb support or an adapter for mounting other devices or surgical equipment, is therefore done by changing the cross section of the active part. By pumping or discharging gas, usually air, the device arms, which are connected by a yoke, expand or collapse, making it possible to install or remove the passive mounting part.

[0007] Preferably, the arms and the yoke are made of polymer fiber composite.
The components of the device made of polymer fiber composite are characterized by the deformability desired for assembly purposes. At the same time it is a lightweight and durable material.

[0008] One variant provides for the passive mounting part mounted on the arms as a clamp.
Under this variant, the arms including the yoke have preferably a circular shape in the cross section.
Preferably, the arms are coated on the outside with a friction increasing material.
Under this variant, the passive mounting part is clamped mainly by expanding the arms to which the gas is pumped. The advantage of the circular cross section is that it can be mounted at any angle - it is possible to rotate the passive mounting part which is a circular clamp.

[0009] In another variant, the passive mounting part is mounted in the gap between the arms.
Preferably, the gap has a spring, preferably with a circular cross section, formed from the yoke side.
Preferably, the arms are coated on the inside, at the place of the gap, with a material that increases friction.
Preferably, the arms form parallel planes on the gap side.
In this variant, the passive mounting part is clamped into the gap between the arms to which the gas is pumped. The spring formed in the gap facilitates the deformation of the active part, improving the pressure of the arms to the passive mounting part placed between them.

[0010] Regardless of the variant it is proposed to apply an elastomer layer, as a material increasing friction, without limiting the scope of the invention, applied to the arms of a polymeric fiber composite in one process during curing of its active part.

[0011] The tests and simulations carried out prove that the device works properly and provides a sufficiently stable fixation.

[0012] The subject of the invention is detailed in the embodiments of two variants on the drawing, where:

Fig. 1 shows the device in a variant in which the passive mounting part is mounted on the arms as a clamp;

Fig.2 shows the cross-section through the active part of the device in the variant from Fig.1;

Fig.3 shows the cross section of the device in the variant in which the passive mounting part is mounted in the gap between the arms;

Fig.4 shows the device as per Fig.3 covered with bottoms;

Fig.5 shows the device as per Fig.3 with simulation of stress and deformation distribution of the active part.

Variant 1

[0013] The mounting device consists of the active part 1 made of deformable, thin-walled material and 1 mm thick and passive mounting part 2. Active part 1 is made up of two opposite arms 3 connected at one end with yoke 4, so that there is a gap 5 between the arms. The arms 3 and yoke 4 are made as air-filled and internally connected spatial cavities 6. The arms 3 and yoke 4 are sealed at the ends with elastic bottoms 7. The arm 3 is equipped with a stub pipe 8 through which air is pumped into cavities 6, in case of assembly, or pumped out in case of disassembly. The arm 3 and yoke 4 are made of polymer fibre composite. Under this variant, the passive mounting part 2 is mounted on the arms 3 as a clamp. The arms 3 together with the yoke 4 have the shape of a circle in the cross section, which allows the passive mounting part 2 to be mounted at any angle. For a more stable fit of the passive mounting part 2, the arms 3 are coated on the outside with a friction increasing material, which is an elastomer layer applied during curing of the active part 1. The effect of the shape of the active part 1, and more specifically the height and length of the gap 5, on the stresses and displacements arising in it is shown below. The study determined how the shape of the active part 1 affects its deformation under pressure. For this purpose, a number of numerical simulations were conducted, the results of which are presented in the table in Fig. 6. The pressure value was 0.2MPa and the wall thickness of the active part 1 was 1 mm. The markings used in the table mean:

u - resultant displacement,

S11- normal stress in horizontal direction,

S22 - normal stress in vertical direction,

S12 - Tangential stresses in the plane.

Variant 2

[0014] The mounting device, identical to the above mentioned variant 1, consists of the active part 1, made of a deformable, thin-walled material 1 mm thick, and the passive mounting part 2. The active part 1 is made up of two opposite arms 3 connected at one end with yoke 4, so that there is a gap 5 between the arms. The arms 3 and yoke 4 are made as air-filled and internally connected spatial cavities 6, where at the ends of arms 3 and yoke 4 they are sealed with elastic bottoms 7. The arm 3 is equipped with a stub pipe 8, which is used to pump air into the cavities 6 in case of assembly or to pump it out in case of disassembly. Arm 3 and yoke 4 are made of polymer fibre composite. Under this variant, the passive mounting part 2 is mounted in the gap 5 between the arms 3. To improve the pressure, the gap 5 has a spring 9 with a circular cross section formed from the yoke side 4. Furthermore, the arms 3 form parallel planes from the gap 5 side. For a more stable fit of the passive mounting part 2, the arms 3 are coated on the inside, at the place of the gap 5, with a friction increasing material, which is an elastomer layer, applied during curing of the active part 1.

Claims

1. A mounting device consisting of an active part made of a deformable, thin-walled material and built of two opposite situated arms connected at one end with a yoke, so that there is a gap between the arms, characteristic in that the arms (3) and the yoke (4) are made as gas-filled and internally connected spatial cavities (6), wherein the ends of arms (3) and yoke (4) are sealed with elastic bottoms (7) and the arm (3) or yoke (4) is fitted with a stub pipe (8), with which gas is either pumped into the cavities (6) or pumped out and a passive mounting part (2) is fitted to the arms (3).

2. The device according to the claim 1, characteristic in that the arms (3) and the yoke (4) are made of polymer fibre composite.

3. The device according to the claim 1 or 2, characteristic in that the passive mounting part (2) is mounted on the arms (3) as a clamp.

4. The device according to the claim 3, characteristic in that the arms (3) including the yoke (4) have a circular cross-section.

5. The device according to the claim 3 or 4, characteristic in that the arms (3) are coated on the outside with a material which increases the friction.

6. The device according to the claim 1 or 2, characteristic in that the passive mounting part (2) is mounted in the gap (5) between the arms (3)

7. The device according to the claim 6, characteristic in that the gap (5) has a spring (9), preferably with a circular cross-section, formed from the yoke side (4).

8. The device according to the claim 6 or 7, characteristic in that the arms (3) are coated on the inside at the place of the gap (5) with a material that increases friction.

9. The device according to any of the claims 6 - 8, characteristic in that the arms (3) form parallel planes from the gap (5) side.

Drawing