JPS6115658B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cable storage device, and mainly relates to a cable storage device.
The present invention relates to a cable storage device for electrically connecting devices provided on a rotating mount side and a fixed mount side of a wire device.

For example, in an X-ray apparatus, since it is necessary to perform fluoroscopic imaging of a patient from all directions, the X-ray tube and imaging device are rotated to take various positions. For this reason, cables for electrically connecting the control equipment installed on the fixed mount side and the equipment installed on the rotating mount side are designed so that the cables between the two devices can be moved smoothly. Designed to ensure distance. When the device is used, it is rarely used at the maximum distance, and in most cases, a distance shorter than that is sufficient. For this reason,
Usually, there is slack in the cable, and there is a problem in that this slack becomes a hindrance to operation or causes an unfavorable result in terms of safety. Therefore, by absorbing the slack of the cable,
Various devices for storing cables have been proposed, one of which is the device shown in FIGS. 1a and 1b. Figure a is a schematic plan view, and figure b is a sectional view taken along the line X-X'.
This cable storage device includes a central cylindrical portion 1 provided around the axis of a rotating disk 1 connected to a rotating shaft 16.
a (a rotating pedestal 30 is provided above the rotating disk 1 corresponding to the cylindrical portion 1a along the rotating axis)
Then, one end of the cable 2 led out from the rotating frame 30 or put into the duct hose is fixed with the fixing band 3, the slack part of the cable 2 is wound around the central cylindrical part 1a several times, and then the cable 2 is The other end is fixed with a fixing band 5 to a bottomed fixed cylindrical tube 4 (hereinafter referred to as fixed cylindrical tube) connected to the fixed mount 21 side, and one end of a leaf spring 6 inserted between adjacent cables is fixed. It is fixed to a part of the central cylindrical part 1a with a screw 7, and the other end is fixed to a part of the fixed cylindrical tube 4 with a screw 8. In addition, the rotating shaft 16
is rotatably supported by a fixed frame 21 via a bearing 20, and the end thereof is designed to mesh with a gear 18 provided on the rotating shaft of a drive motor 19 (actually, a reduction gear is attached). A gear 17 is provided and is rotationally driven by a motor 19. With such a configuration, when slack occurs in the cable 2 disposed between the rotary pedestal 30 and the fixed pedestal 21, the cable 2 disposed between the central cylindrical portion 1a and the fixed cylindrical tube 4 may become slack. The central cylindrical portion 1a is guided by the leaf spring 6.
This allows the slack to be taken up and stored. That is, when the rotary disk 1 rotates clockwise (in the direction of the arrow A in the figure), this rotating direction becomes the winding direction, and the cable 2 is wound around the central cylindrical portion 1a. On the other hand, when the rotating disk 1 rotates counterclockwise (in the direction of the arrow B in the figure), it is in the rewinding direction. In this case, one end of the cable 2 is connected to the central cylindrical part 1
a, and the other end is fixed to a fixed cylindrical tube 4 that serves as a cable holder, so that when rotation in the unwinding direction occurs, the cable 2 spreads toward the periphery in the cable storage section. However, if this spreading operation is performed uniformly in all parts, the cable 2 will maintain ideal equal spacing as shown in Figure 2a by rotating in the unwinding direction. It will spread to However, in reality, due to uneven friction between the cable 2 and the back surface of the rotating disk 1 or the bottom surface of the fixed cylindrical tube 4, or due to the weight of the cable 2, the swirl of the cable 2 may cause the spiral of the rotating disk 1 to The cable 2 does not spread evenly around the periphery, and in this state, the cable 2 near the center of the spiral is unwound together with the central cylindrical portion 1a, resulting in a meandering condition as shown in Figure 2b. . For this reason, there was a problem in that the cable 2 was partially bent to an extreme degree, causing an accident such as a breakage of the wire core.

The present invention has been made in view of the above circumstances, and when the relative distance between the rotating frame and the fixed frame changes, it is possible to smoothly separate the cables connected between the rotating frame and the fixed frame, thereby improving the cable core. The object of the present invention is to provide a cable storage device that does not cause wire breakage, etc., and for this purpose, a rotating cylindrical body having a cable winding part and a flange-shaped part,
An angled portion is formed concentrically with the rotating cylindrical body and protrudes toward the center at the edge of the opening, and a spaced apart portion is formed between the tip of the angled portion and the tip of the flange-like portion of the rotating cylindrical body. a fixed cylindrical body disposed so as to rotate; a cable storage section defined by the fixed cylindrical body and the rotating cylindrical body; and a rotating circle rotatably provided on a rotation axis of the rotating cylindrical body. a plate, and two connecting rods that are slidably arranged side by side on the same circumference near the circumferential side of the rotating disk and that are formed so as to protrude so that their tips are positioned in the cable storage part through the spaced apart part; , two pulleys attached to the tip of the connecting rod and arranged so that the distance between them corresponds to the diameter of the cable;
a first gear mechanism for decelerating the rotational force of the rotating cylindrical body and transmitting it to the rotating disk; and a first gear mechanism for decelerating the rotational force of the rotating cylindrical body and interlockingly rotating the two pulleys in mutually opposite directions. The present invention is characterized by comprising a second gear mechanism configured to cause

The present invention will be specifically explained below using Examples.

Figures 3a and 3b show an embodiment of the cable storage device of the present invention, in which figure a is a schematic plan view and figure b is a sectional view taken along the line X-X'. Moreover, FIGS. 4a to 4c are partial perspective views for explaining the main parts thereof. still,
Components similar to those in FIG. 1 will be described with the same reference numerals. In the figure, reference numeral 9 denotes a rotating cylindrical body (hereinafter referred to as a rotating cylindrical tube), and a flange-like partitioning disk 9c with a large diameter and a flange-like partitioning plate 9c that cuts longitudinally through the approximate center of this cylindrical tube connects a lower cylindrical portion 9a and an upper cylindrical portion. 9b. Moreover, this partitioning disk 9c has a rotating shaft 1 on the lower surface.
6 and is configured to be rotationally driven by a motor 19 via gears 17 and 18. This rotating shaft 16 is pivotally supported by a fixed frame 21 via a bearing 20. Reference numeral 10 denotes a fixed cylindrical tube, which includes a bottom plate portion 10b that revolves around the rotating shaft 16 and is connected to the fixed frame 21, a side angle portion 10c, and a portion extending from the angle portion 10c to the vicinity of the partition disc 9c. A protrusion 10a is provided to protrude so as to reach. A room 22 defined by the fixed cylindrical tube 10 and the rotating cylindrical tube 9 becomes a cable storage section, and a separating section 23 defined by the partitioning disk 9c and the protrusion 10a will be described later. It becomes the moving part of the connecting rod of the movable pulley.

The upper cylindrical portion 9b of the rotary cylindrical tube 9 is connected to the rotary pedestal 30, and has a gear 11 connected to its outer peripheral surface as shown in FIG. 4a. 13
is a rotating disk, and as shown in FIG. 4c, an external gear 13a is formed protruding from its center notch,
There are two connecting pipes 13 near the side edges of the disc part on the opposing surface.
b and 13c are formed protrudingly on concentric circles at appropriate intervals. Pulleys 15A, 15B are rotatably attached to the ends of the connecting pipes 13b, 13c. Connecting pipe 13 in the rotating disk 13
A gear mechanism 14 is provided on the surface opposite to the surface on which b and 13c are attached. That is, this gear mechanism 1
4 meshes with a gear 11 provided on the upper cylindrical portion 9b of the rotating cylindrical tube 9, and has a central axis that is connected to the rotating disk 1.
A gear 14a fixed to a part of 3, and the gear 14
The rotational force of the pulley 14b is transferred to the pulley 14b and the pulley 14d is connected to the shaft 13g provided in the connecting pipe 13b.
belt 14c and pulley 14d for transmitting data to
a gear 14e provided on the same axis as the gear 1;
4e and a gear 14f connected to a shaft 13h provided in the connecting pipe 13c.
The pulley 1 is attached to the tips of the shafts 13g and 13h.
5A and 15B are attached. Therefore, due to the meshing of gears 14e and 14f, pulley 15
A and 15B are rotated in opposite directions. Such a rotating disk 13 is attached so as to be in contact with the circumferential surface of the upper cylindrical portion 9b of the rotating cylindrical tube 9 via a bearing 24 provided on the inner surface of the external gear 13a. At this time, the two connecting pipes 13b,
13c is inserted into the separation part 23, and the pulleys 15A and 15B provided at the tips thereof are arranged so as to be located in the cable storage part 22.

The rotating disk 13 is connected to a gear 11 of the cylindrical portion 9b of the rotating cylindrical tube via a gear mechanism 12. That is, as shown in FIG. 4b, this gear mechanism 12 includes a gear 12a that meshes with the gear 11 of the upper cylindrical portion 9b, a gear 12b provided coaxially with this gear 12a, and a gear 12b that meshes with the gear 12b. a gear 12c, a gear 12d coaxially provided with the gear 12c, and a gear 12e meshing with the gear 12d.
The central axis of each gear is fixed to a mounting plate 12f erected on the fixed frame. The gear 12e is the gear 1 of the rotating disk 13.
By being arranged so as to mesh with 3a,
The rotational force of the rotating cylindrical tube 9 is reduced in speed by the gear mechanism 12 and transmitted to the rotating disk 13,
As a result, the pulleys 15A and 15B are moved by a predetermined amount, and the pulleys 15A and 15B are moved by a predetermined amount through the gear mechanism 14.
15B can be rotated in opposite directions. Therefore, if one end of the cable is fixed to the lower cylindrical portion 9a of the rotary cylindrical tube 9 and the other end is fixed to the fixed frame by passing it between the pulleys 15A and 15B,
The cable is guided by the pulleys 15A and 15B and is unraveled.

Here, a case will be described in which the relationship between the diameters of the pulleys 15A and 15B and the speed change gear ratio of each gear of the gear mechanisms 12 and 14 is set. These are determined by the maximum inner diameter of the fixed cylindrical tube 10, the maximum outer diameter of the lower cylindrical portion 9a of the rotating cylindrical tube 9, and the thickness of the cable 2. That is, for example, as shown in FIG. 5, the movable pulley 15A when the maximum inner diameter of the fixed cylindrical tube 10 is R ₁ , the maximum outer diameter of the lower cylindrical portion 9a is R ₂ , and the thickness of the cable 2 is D ₁ , The diameter D ₂ of 15B is determined by the following equation (1).

D ₂ =R ₁ −R ₂ −3D ₁ (1) Moreover, the reduction ratio n of the gear mechanism 12 may be set to the following relationship. In other words, a predetermined reduction ratio is determined such that the winding circumference length of the cable 2 wound around the lower cylindrical portion 9a and the rotation circumference length along the separation portion 23 of the pulley 15A are equal. . However, the cable 2 is turned back at the pulley 15A, and the amount of movement of the pulley is
Since it becomes 1/2, the rotating circumference length needs to be multiplied by 2.

Therefore, the following equation holds true.

2π{R ₂ + (1/2)・D ₁ }= 2π{R ₁ −D ₁ − (1/2)・D ₂ }×n×2 Substituting the above equation (1) into this and solving The following equation (2) is obtained, and the reduction ratio n of the gear mechanism 12 is determined by this equation (2).

n=(2R ₂ +D ₁ )/(2R ₁ +2R ₂ +2D ₁ )...(2) Furthermore, the reduction ratio n ₂ of the gear mechanism 14 is determined by the following equation (3).

n ₂ = n ₁ × 2 (R ₂ +2D ₁ +D ₂ )/D ₂ (3) In short, the rotating disk 13 rotates n ₁ times while the cylindrical portion 9a makes one rotation, and the pulleys 15A and 15B each rotate This will result in ₂ rotations. Here, pulley 15A
It is preferable that the distance between and 15B be slightly narrower than the above-mentioned D ₁ +D ₂ to improve the degree of crimping between the pulley and the cable.

The manner in which the cables 2 are sorted in the cable storage device having the above configuration will be explained with reference to FIGS. 4a to 4c and FIGS. 6a and 6b. In particular, Fig. 6a shows the rotating cylindrical tube 9.
shows the state in which the rotary cylindrical tube 9 is most wound up in the clockwise direction (direction A in the figure), and FIG. Hereinafter, the operation when the state shown in FIG. 6A changes to the state shown in FIG. 6B (that is, the operation when the cable 2 is rewound) will be explained as an example.

Now, assuming that the rotation of the rotating cylindrical tube 9 in the cable unwinding direction in FIG. 4a is in the C direction (arrow in the figure), the gear 12a in FIG. In the E direction (arrow in the figure),
Furthermore, the gear 12e rotates in the F direction (arrow in the figure). Then, the rotating disk 13 in the figure c rotates in the G direction (arrow in the figure), and along with this, the movable pulley 1
5 moves in the H direction (arrow in the figure). Since the gear ratio is such that the angular velocity of the rotating disk 13 is slower than the angular velocity of the rotating cylindrical tube 9, in the gear mechanism shown in FIG.
When the gear 14a rotates in the direction I, the gear 14e rotates in the I direction (arrow in the figure), and the gear 14e rotates in the J direction (arrow in the figure) via the pulley 14b, belt 14c, and pulley 14d.
The pulley 15A is finally rotated in the K direction (arrow in the figure). On the other hand, since the gear 14f meshes with the gear 14e, it rotates in the L direction (arrow in the figure), and finally rotates the pulley 15B in the M direction. That is, when the rotating cylindrical tube 9 rotates, the pulleys 15A and 15B themselves rotate in the direction of moving the cable, and rotate in the same direction as the rotating cylindrical tube 9 at a constant reduced angular velocity. As a result, the slack in the cable 2 caused by the transition from the state shown in FIG. 6a to the state shown in FIG. This will ensure that no slack is maintained at all times.

In addition, in FIG. 6, if the radius from the rotation center of the pulleys 15A and 15B to the center of the cylindrical portion 9a is R, the cable 2a located inside this radius R
is in contact with the circumferential surface of the rotating cylindrical tube 9, and the cable 2b located outside the radius R is placed on the fixed cylindrical tube 10, so there is no friction that may impede the movement of the cable. In addition, since the pulley itself rotates and pushes out the cable, the tension or compressive force applied to the cable itself is reduced, and breakage of the cable core is almost eliminated.

According to the present invention described in detail above, even if the relative positions of the rotating mount and the fixed mount change, the cable attached between them can be smoothly removed, and the cable core can be easily disconnected. This is a cable storage device that will not cause any problems.

[Brief explanation of the drawing]

Figures 1a and b are explanatory diagrams showing an example of a conventional device, in which figure a is a plan view, figure b is a sectional view taken along line X-X', and Figures 2a and b are explanatory diagrams of its operation. Diagram a
3 is a plan view showing an ideal state, FIG. 3 b is a plan view showing a state where sagging occurs, and FIGS. Figure b is a cross-sectional view taken along the line X-X', and Figure 4 a~
Figure c is a diagram showing the main parts of the device of the present invention, Figure a is a perspective view of the rotating cylindrical tube, Figure b is a perspective view of the gear mechanism,
Figure c is a perspective view of the rotating disk and pulley, Figure 5 is a plan view for explaining the relationship between the gear ratio of the gear mechanism and the diameter of the pulley, and Figures 6a and b are for explaining the operation of the device of the present invention. FIG. 1A is a plan view showing a state where the cable is most wound up, and FIG. 2B is a plan view showing a state where the cable is most unwound. 9... Rotating cylindrical tube, 10... Fixed cylindrical tube, 11
... Gear, 12 ... Gear mechanism, 13 ... Rotating disk, 14 ... Gear mechanism, 15A, 15B ... Pulley, 16 ... Rotating shaft, 17, 8 ... Gear, 19 ...
... Motor, 20 ... Bearing, 21 ... Fixed frame, 22 ... Cable storage section, 23 ... Separation section,
24...Bearing, 30...Rotating stand.

Claims (1)

[Claims] 1. A rotating cylindrical body having a cable winding part and a flange-like part, a protruding part disposed concentrically with the rotating cylindrical body and protruding toward the center at the edge of the opening, and a protruding part having a tip end thereof. a fixed cylindrical body arranged such that a spaced part is formed between the tip of the flange-like part of the rotating cylindrical body; and a cable storage section defined by the fixed cylindrical body and the rotating cylindrical body. ,
A rotating disk rotatably provided on the rotation axis of the rotating cylindrical body, and a cable that is slidably arranged side by side on the same circumference near the circumferential side of the rotating disk and whose tip ends pass through the spaced apart portion. Two connecting rods that are formed to protrude so as to be located in the storage part, and two connecting rods that are attached to the tips of the connecting rods and arranged so that the distance between the two is equivalent to the diameter of the cable. a first gear mechanism for decelerating the rotational force of the rotating cylindrical body and transmitting the rotational force to the rotating disk; A cable storage device comprising: a second gear mechanism configured to rotate in conjunction with the direction of the cable storage device.