JPS58220398A - Cable-drawing device in x-ray photographing device - Google Patents

Abstract

PURPOSE:To obtain a highly reliable cable-drawing device in an X-ray photographing device in which cables can be drawn smoothly even when the displacements of the first and the second frames are different according to the difference between the displacements, and in which any disconnection or breakdown of the cables can be prevented. CONSTITUTION:Outer frames 19a and 19b used as guides for the ends 12b and 12a of an arm support 9, are attached slidable. An X-ray-tube-16-side and an I.I-part-14-side cable 24a and 24b are clamped to ends of the outer frames 19a and 19b by means of cable clamps 23a and 23b. The cables 24a and 24b are drawn to the center of the arm support 9 by means of pulleys 25a and 25b respectively, in such a manner that the cables 24a and 24b are flexible and slidable. The pulleys 25a and 25b are made rotatable by being supported by bearings 29, which are connected to the ends of the pulleys 25a and 25b by means of shafts 28 fixed to attachment plates 26 and 27.

Description

[Detailed description of the invention] [Technical field of invention] This invention is applicable to cardiovascular system XIII diagnosis.

An X-ray system capable of performing a so-called combined imaging system for circulatory system X-ray diagnosis, which can quickly perform both direct and indirect imaging of coronary arteries, brain, abdomen, lower extremity angiography, etc. with a single device. The present invention relates to a cable handling device for a photographing device.

[Technical background of the invention]

In cardiovascular angiography, K
(α) Indirect photography of the front, side, first oblique, and second oblique positions is required in the axial cross section shown in figure (A).
) Indirect photography is required at multiple positions, such as frontal and oblique, in the axial longitudinal section of the figure. In addition, in cerebral angiography, for example, in frontal photography of the carotid artery in the head, Figure 1 (
As shown in c), the center line of the X-ray beam is directly photographed at a predetermined angle β with respect to the orbit orbital line It. Furthermore, in vertebral artery photography, the beam is projected 25 degrees toward the foot with respect to the orbital line IK. Photographing at this position is called the semi-axial position or the Town method. According to this photographing method, the X-ray tube irradiates the horizontal film plane 7 with X-rays as shown in Figure 1. It is necessary to project from the oblique direction of angle (α+β) in C). Also, Figure 1 (
What is C)? In recent years, the imaging method in which X-rays are projected obliquely from below the top plate on which the subject is placed using a reverse K (See Figure 1(d)).

In general, in angiography, imaging is required under fluoroscopy, and when dynamic observation is required, such as in cardiac or coronary angiography, an X-ray image detection device, such as an image intensifier, is used to Direct photography is performed using a film changer. In addition, in the lower extremity angiography, x is performed without moving the patient at all.
While intermittently moving the m-tube and film changer in parallel,
It is preferable to continuously photograph the lower limbs (Fig. 1 (-)
reference).

Conventionally, as this type of X-ray imaging apparatus, a bifurcated arm is rotatably supported by a support rotatably supported on a mount, and a first movable arm that can be reciprocated by a moving mechanism is attached to both ends of the bifurcated arm. An X-ray tube and an X-ray image detection device are attached to the second outer frame so as to sandwich the subject placed on the top plate, and are connected thereto in synchronization with the movement of these. In an X-ray apparatus configured to move a cable, a strip extending along the forked arm and stretched between the first and second outer frames; and a strip attached to one end of the strip. an abutting piece, a detector attached to the outer frame in the vicinity of the abutting piece, and an urging member that normally urges the abutting piece and the detector in a direction to separate them. Equipped with Xl1lil
When an abnormality occurs in the mutual operation between the tube and the X-ray image detection device, the contact piece of the strip is moved against the biasing force of the biasing member to contact the detector and detect this. In the cable handling device in the X-ray imaging apparatus, the amount of movement of the first outer frame connecting the X-ray tube cable and the second outer frame connecting the IeI@ cable is 1.
= 1.

[Problems with background technology]

However, when the amount of movement is configured in a one-to-one ratio like this, normally it moves one-to-one, but sometimes the amount of movement differs, causing problems such as breakage or damage of the cable. There was a point.

[Purpose of the invention]

This invention has been made based on the above-mentioned circumstances, and when the amount of movement between the first frame and the second frame is different, that is, between the X-ray tube side and I@I side cables. Even if the movements of the cables do not correspond one-to-one, breakage or damage to the cable can be prevented, and
It is an object of the present invention to provide a cable handling device for an X-ray imaging apparatus that has an extremely simple configuration and is highly reliable.

[Summary of the invention]

In this invention, a pulley for guiding each cable is provided at both ends of a forked arm, and a guide rod is installed between both ends, and a pair of cable clamp fittings holding an intermediate portion of the cable are attached to the guide rod. A biasing member is installed between both cable clamp fittings to keep the tension of each cable constant, so that the cables can be moved smoothly even if the amount of movement of the outer frame attached to the forked arm is different. It is characterized by the fact that it can be handled easily.

[Embodiments of the invention]

This invention will be described with reference to an embodiment shown in the drawings.

Fig. 2 is a front view showing an embodiment of an X-ray imaging apparatus to which the cable handling device of the present invention is applied, Fig. 3 is a view taken in the X direction of Fig. 2, and Fig. 4 is a view in the Y direction of Fig. 3. 5 is a Z direction arrow view in FIG. 4, FIG. 6 is an enlarged sectional view of the cable guide roller at the cable bending part in FIG. 5, and FIG. 7 is a cable fixing and moving bracket in FIG. 4. Fig. 9 is an enlarged sectional view taken along the I-X line of the cable fixing and moving bracket on the opposite side of Fig. 4, and Fig. 1 is an enlarged sectional view taken along the IT-n line.
Figure 0 is a diagram showing the cable handling state when the first frame and the second frame are stretched by the maximum amount, Figure 11 is a diagram showing the cable handling state when the first frame and the second frame are also contracted by the maximum amount, and Figure 12.
The figure shows a state when the first frame is stretched by the maximum amount and the second frame is contracted by the maximum amount. In each figure, 1 is
This X@photographing apparatus 1, which is a line photographing apparatus, is equipped with a pair of guide rails 6α and SA on the ceiling 2 at a desired interval. Note that it may be configured so that it can be moved on the floor or wall instead of on the ceiling 2. Said guide rail 3
In cL and 3hK, a running frame 5 is arranged so as to be able to reciprocate in the direction of arrow A via running rows 24 on the sides. Further, a column mount 7 is attached to the traveling frame 5 via a rotation mechanism 6, and the column mount 7 is configured to rotate in the direction of arrow B. This is achieved by rotating the strut 8 and the U-shaped arm 9 into the catheter table (not shown).
This is to park the subject so that it does not get in the way when diagnosing the subject placed on the machine using other equipment.

A column 8 is fixed to the lower part of the column mount 7, and a middle column 10 is installed inside this column 8 with a lead screw mechanism (
(not shown) so that it can freely move up and down in the direction of arrow C. This is because the height of the ceiling from the floor varies depending on the building, to maintain an appropriate positional relationship with the catheter table, and to prevent the U-shaped arm from interfering with the floor.

A support member 11 for rotating the U-shaped arm 9 in the direction of the arrow is fixed to the lower part of the middle pillar 10, as shown in FIG. 1 (α).
As shown in , it is now possible to take images of the transverse section of the body axis. This support member 11 incorporates a bearing (not shown), a motor, and a speed reducer that allow the U-shaped arm (hereinafter also referred to as arm support) 9 to freely rotate.
It is configured to be freely rotatable in the direction of the arrow via a shaft (not shown) fixed to. And this arm support 9
A first oblique entry mechanism and a parallel movement mechanism 13. 1.1 part 14 and X-ray continuous imaging device (hereinafter also referred to as film changer) 15 through f
is installed. Further, an X-ray tube 16 is attached to the other end portion 12A of the arm support 9 via a second oblique insertion mechanism and a parallel movement mechanism 13B (not shown).
The first section 14, the film changer 15, and the X-ray tube are arranged to face each other so as to sandwich a subject placed on a top plate (not shown). The 1@1 section 14 and the film changer 15 are attached to the same metal fitting, and can be arranged to face the X-ray tube 16 by rotating approximately 90 degrees from the rotation center OK.

In addition, 17 in the figure is a rotation angle meter of the arm support 9, and 18
α is an optical system, 18h is a 1°V camera, 18C is a cine camera, and 18d is an XIM movable member.

The first and second outer frames 196.19A are movable in parallel in the directions of arrows E and F, respectively. Thus, each said outer frame, 19α.

Axial centers x6 and 'J of bearings 201 and 2OA provided in 19A.

can each move by 1 + -2 + 91 + '1 m, and the X-ray tube 16, 1.1 section 14, and film changer 15 can be arranged facing each other within this moving distance. That is, x
6:y6, Js:yz, xl:yl, xl
: xl, 2t: yl combination allows for opposing arrangement. In the figure, 22 is the mounting bracket for the 2Hi X-ray tube 16.
-1 part 14 and film changer 15 mounting metal fittings. Also, the first and second oblique entry mechanisms, parallel movement mechanisms 13A, 1371? For example, the patent application 1986-114
The structure described in the specification of No. 982 can be mentioned, and a detailed explanation of its structure can be omitted.

Next, the cable handling device will be explained with reference to FIGS. 4 to 12. The outer frames 19α and 19b are slidably attached as guides for one end portions 12b and 12α of the arm support 9, and the outer frame 1
5) Cable clamp 2 on one end of each of E, 19A
3a, 23AK J: ') X Wi tube 1641A and TJ I-1 section 14 side cables 24g, 24.6 are clamped, respectively. These respective cables 24α, 24
The cable h is arranged in the center of the arm support 9 by pulleys 25α and 25h so as to be able to bend and slide. The pulleys 25α, 25h are rotatable by shafts 28 fixed to mounting plates 26 and 27, supported by bearings 29 fitted to both ends of each of the pulleys 25α, 25b.
There is. Cables 24α are attached to the mounting plates 26 and 27.

The guide rods 60 and 61 of the cable 24h are fixed via fixing fittings 32 and 36, and the cable clamp fitting 64 of the cable 24α is connected via the cable guide rods 30 and 61.
A cable clamp fitting 65 of the cable 24h is slidably attached. As shown in FIGS. 7 and 8, the cable clamp fitting 65 has a slide bearing 67 fixed to a slide fitting 66, and the guide rod 60 is inserted into the slide bearing 67, allowing the slide fitting 66 to slide in the axial direction. It makes it possible. on the other hand,
The guide rod 61 is fitted into a groove 66α of the slide fitting 36 to prevent the slide fitting 66 from rotating. This groove 36α
Sheets 68 made of nylon or the like are attached to both sides of the seat so that they can easily slide. The cable 24h is firmly attached to the slide fitting 66 via a cable clamp 69.

Further, the side surface of the slide fitting 66 is fixed with a mounting plate 40 which is the end face of a constant load type spiral spring to be described later, so that the cable 24h is always pulled at the center of the arm support 9 with a constant tension. On the other hand, a trap slide bearing 42 is fixed to the slide fitting 41 that fixes the cable 24α, as shown in FIG. 9, and a guide rod 60 is inserted inside this slide bearing 42. The slide fitting 41 is made slidable along the guide rod 60. On the other hand, the other guide rod 61 is fitted into the groove 41α to prevent the slide fitting 41 from rotating. Sheets 38 made of nylon or the like are attached to both sides of this groove 41a in the same way as described above to make it easy to slide. The cable 24α is firmly fixed to the slide fitting 41 by a cable clamp 43. Further, a constant force type spiral spring unit 44 serving as a biasing member is firmly fixed to the slide fitting 41 similarly to the cable clamp 43.

Then, as explained in FIG.
It is configured to keep the tension at tt and 24h constant. Thus, the cables 242, 2 that have been handled in this way
4A is the first frame 19α and the second frame 197!
Insert the cable into the cable hole 45 in the center of the arm support 9, leaving enough room for the amount of movement of 1, and attach the cable clamp 4 at the entrance.
6, and is connected to a predetermined device etc. through the hollow part of the main rotating shaft 47 of the arm support 9 (4th and 5th
(see figure).

Next, referring to FIGS. 10 to 12, the cable 24
a, 24hf) Explain the state of handling. Figure 10 shows frame 19. This is the state of cable separation when Z and 19A are extended, and at this time, as the frames 19α and 19h move, the cables 24g and 24h are pulled, and the cable clamp fitting 34 holding these cables 24a and 24h is .35 clamp fitting 36.41 is the guide rod 3
0 and t 31 in the direction of separation against the biasing force of the spring 44.

FIG. 11 shows how the cables are handled when the frames 19a and 19A are shrunk; in this case, the cable 24α.

Cable clamp fitting holding 24h - 34,3
The slide fittings 36.41 of No. 5 move toward each other along the guide rod 60 by the biasing force of the spring 44, and the cables 24α, 24b located between the slide fittings 36.41 and the cable clamps 23α, 23h are tensioned. It will be hung.

FIG. 12 is a diagram showing the state when the first frame 19α is extended and the second frame 19A is contracted, and this is a diagram showing the cable clamp fitting 34 holding the cable 24α.
．． 35 slide fittings 36 move along the guide rod 30 in a direction away from the sliding fittings 41. On the other hand, the opposite case and the state where the X11J pipe 16 and the I-1 section 14 are in the center will be omitted.

It should be noted that the above embodiment is merely an example, and it goes without saying that each member can be replaced with another member having the same function. For example, although a pair of guide rods 30 and 31 are shown, one may be used as long as the slide fittings 36 and 41 can be prevented from rotating.

〔Effect of the invention〕

Since the present invention is constructed as described above, even if there is a difference in movement between the first frame and the second frame, the cable can be smoothly handled accordingly, thereby preventing disconnection or damage to the cable. be able to. Moreover, the structure is extremely simple, and it has excellent effects such as being able to supply highly reliable products at low cost.

[Brief explanation of drawings]

Figures 1 (a), (h), (c), (d), and (-) are explanatory diagrams showing the xIm imaging site and angle of the subject, respectively, and Figure 2 is an X1m imaging device to which the cable handling device of the present invention is applied.・Front view showing one embodiment, FIG. 6 is X in FIG.
4 is a view in the Y direction of FIG. 6, FIG. 5 is a view in the Z direction of FIG. 4, and FIG. 6 is an enlarged view of the cable guide roller at the cable bend in FIG. 5. Cross-sectional view, Figure 7 is the 4th
Figure 8 is an enlarged sectional view taken along line I-X of the cable fixing and moving bracket shown in the figure, Figure 8 is a side view of the same side, and Figure 9 (1) is the cable fixing and moving bracket on the opposite side of Figure 4 taken along the Fig. 10 is an enlarged cross-sectional view of the cable when the first frame and the second frame are stretched to the maximum extent, and Fig. 11 is the same (the cable is disposed of when the first frame and the second frame are shrunk to the maximum extent). 12 is a diagram showing the state when the first frame is extended by the maximum amount and the second frame is contracted by the maximum amount. 9... U-shaped arm, 14... 1.1 part, 1
6...X-ray tube, 19a, '+9h-...Outside 7
Ray A% 24!124A1.・Cable, 25α,
25b...Pulley, 26,27...Mounting plate,
30.31... Guide plate, 34.35... Cable clamp fitting, 36.41... Slide fitting, 68... Sheet, 45... Cable hole. Figure 2 B 2 3050643b q8tI ■ 5B-220398 (6) Figure 3 6 ) B 4 □ , / 7 capital h Figure 4 78 questions 1982-220398 (7) Figure 5 Figure 6 25b No. 8 Figure 241) Figure 7 4b Figure 9

Claims (1)

[Claims] A bifurcated arm is rotatably supported on a support that is rotatably supported by a pedestal, and first and second outer frames that can be reciprocated by a moving mechanism are attached to both ends of the bifurcated arm. The X-ray tube, the X-ray image detection device, and the Xl1m continuous imaging device are arranged facing each other so as to sandwich the subject between the first and second outer frames, and are connected to these in synchronization with the movements of these. In an X-ray imaging apparatus adapted to move cables, a pulley fixed to both ends of the forked arm and guiding each cable;
A guide rod installed between both ends of the forked arm, a pair of cable clamp fittings that are movable along the guide rod and hold each of the cables, and a trap tension between the cable clamp fittings. 1. A cable handling device for an X-ray imaging apparatus, characterized in that the cable handling device is provided with a biasing member for keeping the tension of the cable constant.