JP2006167300A - C-shaped arm and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing a C-shaped arm so as to reduce the cost of producing a C-shaped arm supported by a supporting body such that the C-shaped arm can rotate while sliding in the longitudinal direction along a curve of the arm in an X-ray radiographic apparatus for image diagnosis. <P>SOLUTION: An aluminum extruded member 6 having a cross section shown in Fig.(b) is formed by an aluminum extrusion molding method. The aluminum extruded member 6 is hollow and has support channels on both sides. Each of the support channels has inner side channel sections 14 and an inner bottom channel section 15 on its opposing inner side faces 16 and on an inner bottom face 17 along the full length of the support channel. Inner side reinforcing boards 7 made of a steel strip and inner bottom reinforcing bar 9 made of a steel bar having a circular cross section are inserted into the channel sections along the full length of the support channels. The aluminum extruded shape 6 is then subjected to bending processing to be bent into an almost C shape. The C-shaped arm 1 is produced by cutting both the ends and by finishing the end portions. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method of manufacturing a C-arm that holds an X-ray tube and an X-ray detector facing each other in an X-ray imaging apparatus for image diagnosis.

  In the C-arm X-ray imaging apparatus for diagnostic imaging, the C-arm with the X-ray tube and the X-ray detector opposed to each other is bent in the arm longitudinal direction along with the X-ray tube and the X-ray detector. It is configured to be supported by an arm support so as to be slidable along the X-ray imaging direction by the slide rotation of the C-arm.

  The C-shaped arm has a hollow tubular structure, and an X-ray tube disposed at both ends and a power cable for supplying driving power to the X-ray detector, and transmission / reception of electric signals are contained therein. The signal cable for performing is installed (for example, refer patent document 1).

Conventionally, the C-type arm as described above is manufactured by any one of the following methods (1) to (3).
(1) Two steel materials having a substantially U-shaped cross section cut to a predetermined length and two steel plates cut to the same length as the steel material are both substantially C-shaped with the same curvature. After bending in such a manner, they are combined and welded to obtain a substantially C-shaped arm member having support grooves on both side surfaces. A sectional view of the obtained arm member is shown in FIG. After that, an annealing process is performed on the substantially C-shaped arm member, and the inner bottom surface of the support groove and the opposite inner surface are finished for each of the support grooves on both sides supported by the support by the slide rotation mechanism described later. A C-arm 1 is manufactured.
(2) After annealing the substantially C-shaped aluminum casting having the cross section shown in FIG. 5 obtained by casting aluminum, the support grooves on both sides supported by the support by the slide rotation mechanism described later are supported. The C-type arm 1 is manufactured by machining the inner bottom surface of the groove and the opposite inner surface, and further performing putty treatment on the other surface of the aluminum casting.
(3) Supporting each of the support grooves on both sides of the substantially C-shaped aluminum extruded member 6 obtained by forming the extruded aluminum member 6 having the cross section shown in FIG. Screw hole processing is performed at appropriate intervals on the inner bottom surface of the groove and the inner surface facing the groove. Then, the inner side reinforcing plate 7 and the inner bottom reinforcing plate 8 having the same strength as the length of the support groove and having the necessary strength when supported by the support by the slide rotation mechanism described later are respectively connected to the opposing inner side surface and inner side surface. The C-arm 1 is manufactured by screwing and fixing to the bottom surface.

  The support mechanism using the C-arm support using the slide rotation mechanism described above will be described with reference to FIGS. 2 and 3 by taking the case of using the C-arm manufactured by the method (3) as an example. .

  In FIG. 2, the C-type arm 1 is slid and rotated on a C-type arm support 2 fixed to, for example, the ceiling suspension 3 by two sets of inner side slide rotation mechanism 4 and inner bottom slide rotation mechanism 5 having the same configuration. An example that is supported as possible is shown.

  3A is a cross-sectional view taken along the line AA in FIG. 2 for explaining the inner surface slide rotation mechanism 4, and FIG. 3B is a view taken along the line B- in FIG. It is B sectional drawing. Here, the C-shaped arm 1 shown in FIG. 2 has an extruded aluminum member 6 having a cross-section shown in FIG. It is composed of two inner side reinforcing plates 7 and one inner bottom surface reinforcing plate 8 each having the same length as the entire length of the support groove and fixed to the opposing inner side surfaces by screws.

  As shown in FIG. 3A, the inner side surface slide rotation mechanism 4 includes two support shafts fixed vertically to the inner surface of the C-type arm support 2 at positions opposed to the inner surface of the C-type arm support 2. A11 is composed of two rollers A10 that are rotatably attached to each other, and inner side reinforcing plates 7 that are attached to opposite inner side surfaces of the support grooves on both sides of the aluminum extruded profile 6, respectively. One of the inner surface reinforcing plates 7 having two rollers A10 each having an outer diameter slightly shorter than the distance between the surfaces of the opposing inner surface reinforcing plates 7 corresponding to the groove width of the supporting groove. The C-arm 1 is supported so as to be slidable by rotating while being in contact with the surface.

  When the C-arm 1 performs the above-described slide rotation, one of the support shaft A11 or the roller A10 on either side is placed on the surface of the inner bottom surface reinforcing plate 8 attached to the inner bottom surface of each of the support grooves on both sides. An inner bottom slide rotation mechanism 5 is provided so that the parts do not come into contact with each other and hinder smooth slide rotation of the C-arm 1.

  That is, as shown in FIG. 3B, the inner bottom surface slide rotation mechanism 5 has two pieces fixed in parallel to the inner surface of the C-type arm support 2 at positions opposed to the inner surface of the C-type arm support 2. It is composed of two rollers B12 rotatably attached to the support shaft B13, and inner bottom reinforcing plates 8 attached to the inner bottom surfaces of the support grooves on both sides of the aluminum extruded shape member 6, respectively. When the arm 1 performs the above-described slide rotation by the inner surface slide rotation mechanism 4, before the contact shaft A11 or a part of the roller A10 on either side contacts the surface of the inner bottom surface reinforcing plate 8 facing, The roller B12 on the same side rotates while being in contact with the surface of the inner bottom surface reinforcing plate 8 facing the outer peripheral surface, thereby maintaining a smooth sliding rotation of the C-arm 1.

JP 2004-223059 A

However, the methods (1) to (3) for producing the C-shaped arm have the following problems.
(1) Since many processes such as machining, bending, welding, annealing, and finishing are required, the manufacturing cost increases.
(2) The manufacturing cost increases because it is difficult to manufacture the hollow aluminum casting itself and a large number of man-hours are required for the putty treatment on the surface.
(3) Since a C-type arm manufactured by bending an aluminum extruded shape member can be manufactured by a relatively simple process, the C-type manufactured by the method (1) or (2) at this stage. Inexpensive compared to the arm. However, in order to attach an X-ray tube and an X-ray detector of about 30 kg at both ends and hold the bearing so as to be able to rotate, the both inner side surfaces and inner bottom surface of the support groove are insufficiently hardened so that these surfaces are reinforced. A steel plate must be attached, and many man-hours are required for screw hole machining and screwing work in many places, resulting in an increase in manufacturing cost.

  In view of the above circumstances, the present invention provides a manufacturing cost for a C-shaped arm that is supported by a support so that an X-ray tube and an X-ray detector are opposed to each other at both ends and is slidably rotatable along the bending of the arm in the longitudinal direction of the arm. It aims at reducing.

  In order to achieve the above object, the present invention provides a method of manufacturing a C-type arm that holds a weight body at both ends and is supported by a support body so as to be slidably rotatable along the bending of the arm in the longitudinal direction of the arm. A first step of forming an extruded shape member having a support groove supported by a support and a groove provided on the surface of the support groove over the entire length in the longitudinal direction by an extrusion molding method, and a reinforcing member is inserted over the entire length of the groove A second step of installing, a third step of bending the entire extruded shape member having undergone the second step so as to be substantially C-shaped, and a second step of finishing both ends of the extruded shape member having undergone the third step. It consists of four steps, and each step is simple and the cost can be reduced.

  Further, in order to achieve the above object, the present invention provides a method for manufacturing a C-shaped arm that holds a weight body at both ends and is supported by a support body so as to be slidable and rotatable along the bending of the arm in the longitudinal direction of the arm. A first step of forming an extruded shape member having a support groove supported by the support over the entire length in the longitudinal direction on both sides and a groove portion extending over the entire length in the longitudinal direction on the opposite inner surface of the support groove by an extrusion method. And a second step of inserting and installing a reinforcing member over the entire length of each groove, a third step of bending the entire extruded shape member that has undergone the second step so as to be substantially C-shaped, and the third step. It consists of a fourth step of finishing both ends of the extruded shape member, and each step is simplified and the cost can be reduced.

  Furthermore, in order to achieve the above-mentioned object, the present invention relates to a method of manufacturing a C-type arm that holds a weight body at both ends and is supported by a support body so as to be slidably rotatable along the bending of the arm in the longitudinal direction of the arm. An extruded shape having a support groove supported by the support over the entire length in the longitudinal direction and a groove extending over the entire length in the longitudinal direction on each of the inner bottom surface and the opposite inner surface of the support groove is formed by an extrusion method. A first step, a second step in which a reinforcing member is inserted and installed over the entire length of each groove, a third step in which the entire extruded shape member that has undergone the second step is curved so as to be substantially C-shaped, and both ends thereof And the fourth step of performing the finishing process, each step is simple and the cost can be reduced.

  According to the present invention, an X-ray tube and an X-ray detector are opposed to each other at both ends, and a C-type arm that is supported by a support so as to be slidable and rotatable along the bending of the arm in the longitudinal direction of the arm is simpler than before. Since it can be manufactured by the method, the manufacturing cost can be reduced.

  Further, by inserting and installing a reinforcing member over the entire length of the groove portion on the inner surface facing the support groove of the C-arm, the opposing inner surface of the support groove supported by the support body so as to be slidable is reinforced. The rotation function can be maintained for a long time.

  Furthermore, by inserting and installing a reinforcing member over the entire length of the inner bottom surface of the support groove of the C-type arm and the inner surface facing the C-arm, the inner bottom surface of the support groove supported by the support so as to be slidable and the opposite inner side surface Since it is reinforced, the slide rotation function can be maintained for a longer period of time.

  Hereinafter, an embodiment of the present invention will be described with reference to FIG. FIG. 1A is a view showing a cross section of a C-shaped arm 1 manufactured by the method of the present invention, and FIG. 1B is a view for manufacturing a C-shaped arm 1 having the cross section shown in FIG. It is a figure which shows the cross section of the aluminum extrusion shape member 6 shape | molded by the aluminum extrusion molding method.

  When the C-arm 1 is manufactured by the method of the present invention, an aluminum extruded shape 6 having a cross section shown in FIG. 1B is first formed by an aluminum extrusion method.

  The aluminum extruded profile 6 is hollow and has support grooves surrounded by an inner bottom surface 17 and opposing inner side surfaces 16 on both sides, and an inner side surface made of a strip-shaped steel plate on both opposing inner side surfaces 16 for each of the support grooves on both sides. An inner side surface groove portion 14 is provided for allowing the reinforcing plate 7 to be inserted over the entire length of the support groove. Similarly, for each of the support grooves on both sides, an inner bottom surface made of a steel rod having a circular cross section on the inner bottom surface 17. It has an inner bottom groove portion 15 for allowing the reinforcing rod 9 to be inserted over the entire length of the support groove. Further, both the inner side surface groove portion 14 and the inner bottom surface groove portion 15 are opened toward the support groove so that a part of the inserted inner side surface reinforcing plate 7 and inner bottom surface reinforcing rod 9 is exposed to the support groove space. .

  Next, with respect to each of the support grooves on both sides of the aluminum extruded shape member 6, the inner side surface groove portion 14 and the inner bottom surface groove portion 15 provided on both the inner side surface 16 and the inner bottom surface 17 facing each other have the same length as the length of the support groove. An inner side reinforcing plate 7 made of a strip-shaped steel plate and an inner bottom reinforcing rod 9 made of a steel rod having the same length as the support groove and a circular cross section are inserted.

  Next, after bending the aluminum extruded shape member 6 into a substantially C shape by bending the aluminum extruded shape member 6 with the inner side surface reinforcing plate 7 and the inner bottom surface reinforcing bar 9 inserted into each groove portion, both ends are cut and end-cut. The C-arm 1 having the cross section shown in FIG. 1A is obtained by finishing the part.

  A C-type arm 1 having the cross section shown in FIG. 1A manufactured by the method of the present invention is a C-type arm support of the C-type arm 1 using the slide rotation mechanism described with reference to FIGS. The support mechanism according to 2 has the same function as the C-arm 1 manufactured by the method described in the above (3) and having the cross section shown in FIG.

  According to the method of the present invention, the mounting operation of the surface reinforcing member of the support groove, which has been the cause of the cost increase in the manufacturing method described in the above (3), Since the screwing operation is performed, it is only necessary to insert a band-shaped or bar-shaped surface reinforcing member into the groove formed over the entire length of the support groove at the time of extrusion molding, before bending into a substantially C shape. The C-arm 1 can be manufactured at a low cost as compared with any of the methods (1) to (3).

  The present invention relates to a method of manufacturing a C-arm that holds an X-ray tube and an X-ray detector facing each other in an X-ray imaging apparatus for image diagnosis.

It is sectional drawing of the C-type arm and aluminum extrusion shape material for demonstrating the Example of this invention. It is a figure for demonstrating the support mechanism by the support body of a C-type arm using a slide rotation mechanism. It is a figure for demonstrating a slide rotation mechanism. It is sectional drawing of the C-type arm manufactured by the conventional method. It is sectional drawing of the C-type arm manufactured by the conventional method. It is sectional drawing of the C-type arm manufactured by the conventional method.

Explanation of symbols

1: C-type arm 2: C-type arm support body 3: Ceiling suspension part 4: Inner side surface slide rotation mechanism 5: Inner bottom surface slide rotation mechanism 6: Aluminum extrusion profile 7: Inner side surface reinforcing plate 8: Inner bottom surface reinforcing plate 9 : Inner bottom reinforcing bar 10: Roller A
11: Spindle A
12: Roller B
13: Spindle B
14: Inner side groove 15: Inner bottom groove 16: Inner side 17: Inner bottom

Claims (3)

In a manufacturing method of a C-type arm that holds a weight body at both ends and is supported by a support body so as to be slidably rotatable along the bending of the arm in the longitudinal direction of the arm, the support groove and the support groove supported by the support body A first step of forming an extruded shape member having a groove provided on the surface thereof over the entire length in the longitudinal direction by an extrusion molding method, a second step of inserting and installing a reinforcing member over the entire length of the groove, and the second step. A C-shaped process comprising: a third step of bending the entire extruded shape member so as to be substantially C-shaped; and a fourth step of finishing both ends of the extruded shape member that has undergone the third step. The manufacturing method of an arm. In a manufacturing method of a C-type arm that holds a weight body at both ends and is supported by a support body so as to be slidable and rotatable along the bending of the arm in the longitudinal direction of the arm, the support groove supported by the support body is formed in both longitudinal directions. A first step of forming an extruded shape member having a groove portion extending over the entire length in the longitudinal direction on the opposing inner surface of the support groove by an extrusion molding method, and inserting and installing a reinforcing member over the entire length of each groove portion A second step of performing, a third step of bending the entire extruded shape member that has undergone the second step so as to be substantially C-shaped, and a fourth step of finishing both ends of the extruded shape member that has undergone the third step. A method of manufacturing a C-arm, comprising: a step. In a manufacturing method of a C-type arm that holds a weight body at both ends and is supported by a support body so as to be slidable and rotatable along the bending of the arm in the longitudinal direction of the arm, the support groove supported by the support body is formed in both longitudinal directions. A first step of forming an extruded shape member having a groove portion extending over the entire length in the longitudinal direction on each of the inner bottom surface and the opposite inner side surface of the support groove by an extrusion molding method, and reinforcement over the entire length of each groove portion. A second step of inserting and installing the member, a third step of bending the entire extruded shape member having undergone the second step so as to be substantially C-shaped, and finishing of both ends of the extruded shape member having undergone the third step And a fourth step of performing a C-arm.

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