ES2628440T3 - Clamp - Google Patents

Abstract

A fixing bracket (1) for attaching an accessory in a separable and adjustable way by means of the position of a suitable fixing support (2), said fixing bracket (1) comprising - an axis (3) that is supported on the support ( 2) fastener that is arranged to serve as structure of said fastener clamp; - a clamp (4) that includes two adjacent clamp elements, a first and a second clamp element (41, 42), a space (43) with a diameter (b) between the clamp elements, said space defining the width of the opening in the rest position of said clamp (4), said clamp containing, in addition, a first spring element (44); space (43) in which there is arranged a channel (5) for the support bar (T) of an accessory for fixing said accessory to the clamp and to the fixing clamp; - first and second elements (6; 61, 62) of toothed crown arranged in a mutually coincident position; - a second spring element (7; 71) between the toothed crowns (6; 61, 62); and - a clamp actuator (8); said clamp (4), said toothed crown elements (6; 61, 62) and said second spring element (7; 71) being mounted in an intermediate space (23) of the fixing support and interconnected by means of an axis ( 3) that passes at right angles through its central region; and at the first end (31) of said shaft (3), outside the fixing support (2), a clamp actuator (8) is fixed to press the clamp elements (41, 42) of the clamp (4) each other, and respectively to open them to fix the support bar (T) in the channel (5) and respectively to separate it from the channel (5); the shaft (3) is in the region of the clamp (4) provided with two projections (33, 34) that are separated from each other at a distance (a), the first (33) of said projections being disposed outside the clamp (4), towards the outer surface (41 b) of the first clamp element (41), and the second (34) being arranged inside the clamp, towards the inner surface (42a) of the second element (42) of clamp, and having, between said second clamp element (42) and the fixing support (2), toothed crown elements (6; 61, 62) mutually arranged, and a second spring element (7; 71) , the distance of the projections (33, 34) being shorter than the summed length of the diameter (b) (in the resting position of the clamp) of the space (43) and the thickness (c) of the first element (41) clamp, that is, a <b + c; characterized in that - the distance of the projections (a) is greater than the thickness (c) of the first clamp element (41), - the clamp actuator (8) is an eccentric lever (81) with the eccentric lever (81) being provided ), especially the head (811) of the eccentric lever, of adjustment elements (9) for adjusting the position of the first end (31) of the shaft with respect to the head (811) of the eccentric lever, comprising the elements (9 ) adjusting a threaded part (91) disposed at the first end (31) of the shaft, and a crosshead nut (92) disposed on the head (811) of the eccentric lever, said crosshead nut (92) being provided with an opening (921) for the shaft, said threads of the threaded part (91) and the opening (921) of the shaft being mutually compatible; and a stop element (93) which is mounted in a hole (94), with right angles with respect to the opening (921) of the shaft of the cross nut (92), said stop element (93) being provided and hole (94) of mutually compatible threads, said stop element being arranged, by rotating it in one direction in the hole, to be pressed against the first end (31) of the shaft located in the opening of the crosshead nut (92) , in particular, against the threaded part (91), and to lock the shaft (3) in place with respect to the head of the eccentric lever, and respectively, by rotating the stopper element in an opposite direction, to release the first end (31) of the shaft, so that both the shaft and the eccentric lever can be mutually rotated in the threads of the threaded part and of the shaft opening and adjusted in position.

Description

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DESCRIPTION

Fixing clamp

The invention relates to a fixing clamp according to the preamble of claim 1.

In the prior art, fixing devices are known, in particular fixing clamps, the purpose of which is to attach accessories for example to surgical tables, among others by patent publications US2008 / 0312509A1, GB- 879,878 and US-4,383,351.

The surgical tables are equipped with several different accessories. Among these, for example, several different supports that are fixed to the surgical table in a detachable manner will be highlighted, and so that its position can be adjusted, supports by which the patient's limbs can be supported in a desired position, or supports by means of which various different accessories or their necessary parts in the operation can be fixed to the surgical table. You can also attach the corresponding accessories to other hospital furniture, such as bedside tables, accessories that can then be used to help the patient, for example, in various treatments.

With current fixing devices, the problem is often how to obtain sufficient clamping force. This is due to several different reasons, for example, that the appropriate clamping force must be created by a moderate manual force. It is also noted that the fixing accessory element has a generally circular cross-section, which also requires a high degree of friction between the fixing surfaces of the fixing element and the fixing part of the accessory to make a tight fixing grip.

The object of the invention is to eliminate the problems related to the known fixing devices currently used, in particular, the fixing clamps. Another object of the invention is to make a new fixing clamp that is suitable for fixing various accessories to hospital furniture, in particular, to surgical tables, fixing clamps that have a simple structure and reliable operation, thus holding the accessory in a desired position and locked in place.

The fixing bracket according to the invention is characterized by what is defined in the attached claim 1. The dependent claims define preferred embodiments of the fixing bracket according to the invention.

Among the advantages of the invention, there is a simple and solid structure, good blocking characteristics, modest space requirements and good ergonoirna.

Another advantage of the invention is a minimal need for compression force. In addition, the invention is economical to manufacture due to the simple structure, and is easy to maintain.

Among other advantages of the invention, a minimum need for adjustments will be highlighted, in particular, in an embodiment of the invention in which an eccentric lever is used as the clamp actuator.

Another advantage of the invention is that two different rotational movements are locked and released by a single lever, that is, an eccentric lever.

Another additional advantage of the invention is that the toothed crown elements are locked on the shaft by a separate projection, that is, a second projection. The force that presses the toothed crowns between each other is not transmitted through the clamp, but through the intermediation of the second projection of the shaft. This type of structure is solid and reliable.

A particular advantage of the invention is that it can be used to fix various accessories other than hospital furniture, but especially to surgical tables and the like. However, the invention is not restricted only to the attachment of accessories to surgical tables, but can be applied to many different objectives in which a reliable and easily fixed fixing device is needed.

Next, the invention and its additional advantages are described in more detail, with reference to the attached drawing, in which

Figure 1

Figure 2 Figure 3

Figure 4

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it is a schematic illustration of a side view of a delivery bed, in which the footrest of the parturient is fixed to the bed by means of a fixation clamp according to the invention; it is a side view illustration of the fixing clamp;

illustrates the fixing clamp in an open position and in a cross-sectional view along the line A-A of Figure 2;

illustrates the fixing clamp in a closed position and in a cross-sectional view along the line A-A; Y

illustrates a cross-sectional view of an eccentric lever.

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The drawings illustrate an advantageous clamp 1 for fixing according to the disclosure. Similar reference numbers are used in the drawings for similar parts of the clamp.

A fixing clamp 1 is designed to attach an accessory detachably to a hospital furniture, such as a surgical table and the like. By means of the fixing clamp 1, the accessory is fixed on the support bar T thereof, detachably and adjustable in position to a fixing support 2. Now, the fixing bracket 2 is arranged to serve as the structure of the fixing bracket 1.

Figure 1 shows an example in which the footrests 11 of the parturient are fixed, by means of a support bar T belonging to the footrest, by means of a fixing clamp 1 according to the disclosure to the lateral supports 12 arranged in both sides of the base 13 of the delivery bed 10, lateral supports that serve, therefore, as a structure and as a support 2 for fixing the fixing clamp.

A fixing clamp 1 according to the disclosure comprises an axis 3, a clamp 4 that includes a first spring element 44, two elements 6; 61, 62 toothed crown, a second spring element 7 and a clamp actuator 8.

The axis 3 of the fixing bracket is supported on the fixing bracket 2. The axis 3 is arranged to pass through the fixing support 2, in particular, through at least one lateral element 22, in the present embodiment, through both lateral elements 22, 23. Between the lateral elements 22, 33 , an intermediate space 24 is left, through which the axis 3 is arranged to pass. The majority of the fastening clamp elements is arranged in that part of the axis 3 which is located in the intermediate space 24.

The clamp 4 comprises two adjacent clamp elements, a first and a second clamp element 41, 42, a space 43 between the clamp elements and a first spring element 44. The spring element 44 is arranged in connection with the clamp elements, so that its elastic force separates the clamp elements 41, 42. In connection with the space 43, there is a fixing groove or a corresponding channel 5 for the fixing bar T, to fix it to the clamp and to the clamp.

The first and second elements 6; Toothed crown 61, 62 are arranged in a mutually coincident position. The second spring element 7, preferably a wavy spring 71, is disposed between the toothed crowns 6; 61, 62. The elastic force of element 7; Spring 71 is arranged to separate toothed crowns 6; 61, 62. In the open position of the fixing clamp 1, the toothed crowns are not in a mutually locked position, but only in the closed position.

The first element 6; Toothed crown 61 is connected, for example, by means of a first set of pins 63, removably in the longitudinal direction B-B of the axis 3, with the support 2; 21, in particular, with the other side element 23. The second element 6; Toothed crown 62 is connected respectively, for example by means of a second set of pins 64, removably in the longitudinal direction B-B of the axis 3, with the clamp 4, in particular with the second clamp element 42 of the same. Now, the first element 6; Toothed crown 61 cannot rotate around axis 3, while the second element 6; Toothed crown 62 is free to rotate with the second clamp element 42, in case the fixing clamp 1 is in the open position. Neither the first element 6; 61 toothed crown or the second element 6; Toothed crown 62 or the second clamp element 42 connected thereto, can rotate about axis 3 when the fixing clamp is in the closed position.

In the region of the clamp 4 (relatively close to the other end 32 of the shaft), the axis 3 of the clamp is provided with two projections 33, 34, separated at a mutual distance a. The first projection 33 is disposed outside the clamp, towards the first clamp element 41, that is, its outer surface 41 b. The second projection 34 is disposed within the clamp 4, towards the second clamp element 42, especially its internal surface 42a. Between the second clamp element 42 and the support 2; 23 fixing elements 6 are arranged; 61, 62 toothed crown facing each other, and between them the second spring element 7, such as a wavy spring 71.

The clamp actuator 8 is disposed at the first end 31 of the axis 3, outside the support 2; 21, especially outside the second lateral element 23. The clamp actuator 8 is used to affect the axis 3, so that the clamp elements 41, 42 of the clamp 4 can be pressed between sf and open, respectively, to fix the support bar T in the clamp channel 5, and to separate it, respectively, from the clamp channel 5. The axis 3 is arranged to pass through the fixing support 2, in this case through the second lateral element 23, so that said fixing support, that is, the second lateral element 23, in that case serves as a stationary support for clamp 4 and clamp.

When the clamp actuator 8 affects the axis 3, in particular its first end 31, so that it is pulled in the longitudinal direction B-B of the shaft, outwardly from the support 2; 23, in particular, from the second side element 23, the fixing bracket 1 is brought to the closed position in two stages. Due to the effect of the movement of the axis 3, in the first stage the second projection 34 of the axis compresses the second clamp element 42 and, thus, the second spring element 7 (at least partially), and blocks the

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first and second serrated crowns 6; 61, 62 between sf, so as to avoid the rotational movement of the clamp 4 and the bar T (in addition to an accessory, etc.) fixed thereto in a plane perpendicular to the longitudinal direction B-B. When it continues the movement of axis 3, in the second stage, the first projection 33 presses the first clamp element 41 of the clamp against the second clamp element 42 and compresses the space 43 that remains between them to make it smaller (and finally closed by complete), and so that the channel 5 in cross-section is made smaller than in the open position, that is, in the resting position of the clamp. Now, the support bar T is fixed by compression in place in the channel 5 and is locked to be immovable.

Respectively, when the clamp actuator 8 affects axis 3, in particular, its first end 31, so that it is pushed, in the longitudinal direction B-B of the shaft, into the support 2; 21, the fixing clamp 1 is carried in two stages, but in a reverse order, to the open position, and the support bar T of the channel 5 is released. Now, the support bar T can be moved in the longitudinal direction thereof, in channel 5; and / or the clamp 4 can be rotated, together with the support bar located in the channel 5, around the longitudinal axis B-B of the axis 3.

The distance of the projections 33, 34 is advantageously shorter than the added length of the diameter b (in the resting position of the clamp) of the space 43 of the clamp 4 and the thickness c of the first clamp element 41, that is, a <b + c. With these measures, the projections are made to function in a desired manner.

In a preferred embodiment of the invention, the projections 33, 34 are made on axis 3. In that case, axis 3 comprises three successive parts 3a, 3b, 3c. The first projection 33 is formed between the first axis element 3a and the second axis element 3b, and the second projection 34 is formed between the second axis element 3b and the third axis element 3c. Among the diameters of the axle elements 3a, 3b, 3c, the diameter has of the first axis element 3a is the longest, the diameter hb of the second axis element 3b is shorter and the diameter hc of the third axis element 3c It is the shortest. In addition, the diameter of the opening 45 provided in the first clamp element 41 for the axis 3 corresponds substantially to the diameter of the second axis element 3b, and the diameter of the opening 46 provided in the second clamp element 42 for the axis 3, corresponds substantially with the diameter of the first axis element 3a.

In a preferred embodiment of the disclosure, the clamp elements 41, 42 of the clamp 4 and the first spring element 44 together form a uniform U-shaped element, in which a space 43 is provided between the adjacent clamp elements . The curved bottom element of the U-shaped clamp is flexible and forms the spring element 44. In the environment of the union of the clamp elements 41, 42, a groove or a corresponding channel 5 is provided for the support bar T, for fixing it to the clamp. The shaft 3 is arranged to pass through the openings 45, 45 arranged in the central region of the clamp elements 41, 42 of the clamp 4.

A particular advantage of the above-described embodiment of the disclosure is the minimum compression force requirement of the actuator 8. The first spring element 44 has a light structure, and the compression point on the longitudinal axis B-B is relatively located away from the spring element 44 and the channel 5, in which case the compression force is transmitted to the support bar T intensely through the lever arm. In addition, the second spring element 7 has a light structure, and its only task is to separate the elements 6; 61, 62 toothed crown.

Another advantage is that the minimum compression force requirement prevents wear of the fixing clamp parts and therefore reduces the need to adjust it.

In a preferred embodiment of the disclosure, the actuator 8 of the clamp is an eccentric lever 81. It comprises an eccentric head 811 and a lever arm 812. The surface 811 a of the eccentric head is curved with respect to the pivot point E, so that the distance of the points on the surface 811 is increased / reduced when the angle of rotation of the eccentric head between the surface is increased / reduced release position C and lock position D.

Fixing clamp 1 works as follows. When the eccentric lever 81 is turned on the lever arm 812 to the locked position C, the eccentric head 811, due to its shape, drives the shaft 3 out of the support 2; 21, in this case, in particular, outside the second lateral support 23. Now, in the first stage, the second projection 34 of the shaft compresses the second clamp element 42 and, thus, the second element 7; 71, spring, so that it shrinks at least partially, so that the toothed crowns 6 are blocked; 61, 62 in a mutually coincident position, thus avoiding rotational movement. In the second stage, the first projection 33 presses the first clamp element 41 of the clamp against the second clamp element 42 and, thus, compresses the space 43 so that it becomes smaller, and simultaneously so that the channel 5 it is made smaller in cross section than in the rest position, so that the support bar T located in the channel is fixed by compression in place in the channel. Respectively, when the eccentric lever 81 in the lever arm 812 is rotated to the release position D, the eccentric head 811, due to its shape and the elastic forces of the spring elements 44, 7, releases the axis 3 back inside support 2; 21, in which case, in a reverse order with respect to the

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above description, the fastener clamp elements are released from each other, and the support bar of the channel 5 is released, so that the position and the rotation angle of the support bar T can be adjusted.

It is emphasized that no intense compression force of the eccentric lever 8 is required; 81. This allows the design of the eccentric head 811, so that the movement of the axis 3 in the longitudinal direction B-B between the blocking position C and the release position D, achieved by the eccentric lever, is large enough to guarantee a light but reliable operation of the clamp 1.

In a preferred embodiment of the disclosure, the eccentric lever 81, especially the head 811 of the eccentric lever, is provided with adjustment elements 9 to adjust the position of the first end 31 of the axis 3 with respect to the head 811 of the eccentric lever. At the same time, the compression force of the eccentric head can be adjusted so that it is suitable to make the eccentric lever light to use, and to thereby obtain a sufficient compression force, so that guarantee a reliable fixing operation.

In a preferred embodiment of the disclosure the adjustment elements 9 (cf. Figure 5) comprise a threaded part 91 disposed at the first end 31 of the axis 3, said threaded part being provided with an external thread; a crosshead nut 92 disposed on the head 811 of the eccentric lever, said crosshead nut 92 including an opening 921 of the shaft and an inner thread therein, and a stopper element 93. The threads of the threaded part 91 and the crosshead nut 92 are mutually compatible. The stopper element 93 is mounted in the hole 94, with right angles with respect to the opening 921 of the shaft of the crosshead nut 92. The stop member 93 and the hole 94 are provided with mutually compatible threads. The stopper element 93 is arranged, by rotating in one direction in the hole 94, to be pressed against the first end 31 of the shaft located in the opening of the crosshead nut 92, in particular, against the threaded part 91, and to lock axis 3 in place with respect to the eccentric lever head. Respectively, by turning the stop element 93 in the other direction, the first end 31 of the shaft is released, so that the axis 3 and the eccentric lever 81 can be mutually rotated in the threads of the threaded part and the opening of the axis and, therefore, the position of the stop element 93 can be adjusted.

In a preferred embodiment of the disclosure, the stop element 93 comprises a stop screw 931 and a locking pin 932, which is advantageously manufactured from nylon or some corresponding plastic material. In a blocking situation, the locking pin 932 is pressed, by rotating the stop screw 931, against the axis 3, in particular against the threaded part 91 of the axis and, respectively, in a release situation, the locking pin 931 by turning the stop screw 931 in the opposite direction.

The invention is not restricted only to the embodiments described above, but many modifications are possible within the scope of the inventive idea defined in the appended claims.

Claims (4)

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A fixing bracket (1) for attaching an accessory in a separable and adjustable way by positioning a suitable fixing bracket (2), said fixing bracket (1) comprising - an axis (3) that is supported on the fixing support (2) that is arranged to serve as structure of said fixing bracket; - a clamp (4) that includes two adjacent clamp elements, a first and a second clamp element (41, 42), a space (43) with a diameter (b) between the clamp elements, said space defining the width of the opening in the resting position of said clamp (4), said clamp containing, in addition, a first spring element (44); space (43) in which there is arranged a channel (5) for the support bar (T) of an accessory for fixing said accessory to the clamp and to the fixing clamp; - first and second elements (6; 61, 62) of toothed crown arranged in a mutually coincident position; - a second spring element (7; 71) between the toothed crowns (6; 61, 62); Y - a clamp actuator (8); said clamp (4), said toothed crown elements (6; 61, 62) and said second spring element (7; 71) being mounted in an intermediate space (23) of the fixing support and interconnected by means of an axis ( 3) what happens at right angles through its central region; and at the first end (31) of said shaft (3), outside the fixing bracket (2), a clamp actuator (8) is fixed to press the clamp elements (41, 42) of the clamp (4) between sf, and respectively to open them to fix the support bar (T) in the channel (5) and respectively to separate it from the channel (5); the axis (3) is in the region of the clamp (4) provided with two projections (33, 34) that are separated from each other at a distance (a), the first (33) of said projections being arranged outside the clamp (4), towards the outer surface (41 b) of the first clamp element (41), and the second (34) being arranged inside the clamp, towards the inner surface (42a) of the second element (42) of clamp, and having, between said second clamp element (42) and the fixing support (2), toothed crown elements (6; 61, 62) mutually arranged, and a second spring element (7; 71) , the distance of the projections (33, 34) being shorter than the summed length of the diameter (b) (in the resting position of the clamp) of the space (43) and the thickness (c) of the first element (41) clamp, that is, a <b + c; characterized because - the distance of the projections (a) is greater than the thickness (c) of the first clamp element (41), - the clamp actuator (8) is an eccentric lever (81) with the eccentric lever (81), especially the head (811) of the eccentric lever, having adjustment elements (9) for adjusting the position of the first end ( 31) of the shaft with respect to the head (811) of the eccentric lever, the adjusting elements (9) comprising a threaded part (91) disposed at the first end (31) of the shaft, and a crosshead nut (92) arranged at the head (811) of the eccentric lever, said crosshead nut (92) having an opening (921) for the shaft, said threads being mutually compatible with the threaded part (91) and the opening (921) From the axis; and a stopper element (93) which is mounted in a hole (94), with right angles with respect to the opening (921) of the shaft of the crosshead nut (92), said stopper element (93) being provided and hole (94) of mutually compatible threads, said stop element being arranged, by its rotation in one direction in the hole, to be pressed against the first end (31) of the shaft located in the opening of the crosshead nut (92) , in particular, against the threaded part (91), and to lock the shaft (3) in place with respect to the head of the eccentric lever, and respectively, by rotating the stopper element in an opposite direction, to release the first end (31) of the shaft, so that both the shaft and the eccentric lever can be mutually rotated in the threads of the threaded part and of the shaft opening and adjusted in position. 2. A fixing clamp according to claim 1, characterized in that the projections (33, 32) are made in the axis (3), so that the axis comprises three successive elements (3a, 3b, 3c), the first projection formed (33) of which between the first axis element (3a) and the second axis element (3b), and the second projection (34) is formed between the second axis element (3b) and the third element (3c) of axis, between whose diameters of the axis elements, the diameter (ha) of the first is the longest, the diameter (hb) is shorter and the diameter (hc) of the third is the shortest, and the diameter corresponding substantially the opening (45) of the first clamp element (41) provided for the shaft (3), with the diameter of the second shaft element (3b), and substantially corresponding to the diameter of the opening (46) of the first second element (42) ) provided for the shaft (3) with the diameter of the first shaft element (3a). 3. A fixing clamp according to claim 1 or 2, characterized in that the clamp elements (41, 42) of the clamp (4) and the first spring element (44) together form a uniform U-shaped element, providing between the adjacent clamp elements a space (43), and the lower part of said space, like the union of the clamp elements, is provided with a groove or a corresponding channel (5) for a bar (T) of support. 4. A fixing clamp according to claim 1, characterized in that the stop element (93) comprises a stop screw (931) and a locking pin (932), which is advantageously manufactured from nylon or some corresponding plastic material , locking pin which is in a locking situation pressed against the shaft, in particular, against the threaded part (91) of the shaft.