JPS6115657B2 - - 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 pedestal 21 via a bearing 20, and at its end there is a gear 18 provided on the rotating shaft of the drive motor 19 (actually, a reduction gear is added) so as to be able to mesh with the gear 18. 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 plate provided between the central cylindrical portion 1a and the fixed cylindrical tube 4 The central cylindrical portion 1a is guided by the 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 spiral of the cable 2 is caused by the twisting of the rotating disk 1. 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, resulting in an accident in which the wire core was broken.

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 opening edge, and a spaced apart portion is formed between the tip of the angled portion and the flange-like portion of the rotating cylindrical body. a fixed cylindrical body arranged so as to be rotated; a cable storage section defined by the fixed cylindrical body and the rotary cylindrical body; a connecting rod having one end attached near the circumferential surface of the rotating disk and protruding so that the other end is located in the cable storage section through the spacing section; and a spring attached to the other end of the connecting rod. The present invention is characterized by comprising a pulley attached via a gear mechanism, and a gear mechanism for decelerating the rotational force of the rotating cylindrical body and transmitting the rotational force to the rotating disk.

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 the central partition notch, and a connecting rod 13b is formed protruding near the side edge of the disk portion on the opposing surface. ing. A spring 14 is attached to the tip of this connecting rod 13b, and this spring 1
A movable pulley 15 is attached to the tip of 4. Such a rotating disk 13 is attached to 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 connecting rod 13b is inserted into the spacing section 23, and the spring 14 and movable pulley 15 provided at the tip thereof are arranged so as to be located inside the cable storage section 22.

The rotating disk 13 is connected to a gear 11 on the upper cylindrical portion 9b of the rotating cylindrical tube 9 via a gear mechanism 12. That is, this gear mechanism 12 is shown in FIG.
As shown in the figure, a gear 12a meshes with the gear 11 of the upper cylindrical portion 9b, a gear 12b coaxially provided with the gear 12a, a gear 12c meshes with the gear 12b, and a gear 12c coaxially provided with the gear 12c. It consists of a gear 12d provided on the frame and a gear 12e meshing with the gear 12d, and the central axis of each gear is fixed to a mounting plate 12f erected on the fixed frame. The gear 12e is connected to the rotating disk 13.
By arranging it so that it meshes with the gear 13a, 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, whereby the movable pulley 15 can be moved by a predetermined amount. Therefore, one end of the cable is fixed to the lower cylindrical portion 9a of the rotating cylindrical tube 9, and the movable pulley 15
If the other end is fixed to a fixed pedestal along the circumferential surface of the movable pulley 15, the cable will be guided by the movable pulley 15.

Here, a case will be described in which the relationship between the diameter of the movable pulley 15 and the gear ratio of each gear of the gear mechanism 12 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 maximum inner diameter of the fixed cylindrical tube 10 is _R1 , the maximum outer diameter of the lower cylindrical portion 9a is _R2 , and the thickness of the cable 2 is _D1 . diameter
D ₂ 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 length of the winding circumference of the cable 2 wound around the lower cylindrical portion 9a is equal to the length of the rotation circumference of the movable pulley 15 along the separation portion 23. be. However, since the cable 2 is turned back at the movable pulley 15 and the amount of movement of the movable pulley is halved, the rotational circumference length must 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) See Figures 4 a to c and Figures 6 a and b for how the cables 2 are sorted in the cable storage device with the above configuration. and explain. 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 is pushed and moved in the H direction (arrow in the figure) (if the movable pulley 15 is located behind the connecting rod 13b in the rotational direction, it is pulled). That is, when the rotating cylindrical tube 9 rotates, the movable pulley 15 rotates in the same direction as the rotating cylindrical tube 9 and at a deceleration angular velocity determined by the reduction ratio. 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. As a result, it will always remain in a tensioned state.

When installing the cable 2, if the position of the movable pulley 15 is slightly rotated in the cable unwinding direction so that force is applied to the spring 14, the movable pulley 15 will always be pushed (or pulled). ), and the effect becomes even greater. Also, the 6th
In the figure, if the radius from the automatic center position of the movable pulley 15 to the center of the rotating cylindrical tube 9 is R, the cable 2a located inside this radius R is in contact with the circumferential surface of the rotating cylindrical tube 9. , , and since the cable 2b located outside the radius R is placed on the fixed tube 10, the friction that would be an obstacle to the movement of the cable is reduced, and therefore the tension area applied to the cable itself is reduced. Since the compressive force is reduced, there is almost no chance of the cable core breaking.

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 movable pulley, Figure 5 is a plan view for explaining the relationship between the gear ratio of the gear mechanism and the diameter of the movable pulley, and Figures 6a and b are of the device of the present invention. FIG. 3A is a plan view for explaining the operation, and FIG. 3B is a plan view showing the cable in the most twisted state, and FIG. 9... Rotating cylindrical tube, 10... Fixed cylindrical tube, 11
... Gear, 12 ... Gear mechanism, 13 ... Rotating disk, 14 ... Spring, 15 ... Moving pulley, 16 ... Rotating shaft, 17, 18 ... Gear, 19 ... Motor, 2
0...Bearing, 21...Fixed frame, 22...
Cable storage section, 23... Separation section, 24... Bearing, 30... Rotating frame.

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, one end of which is attached near the circumferential surface of the rotating disk, and the other end of which is located in the cable storage section via the spacing section. It includes a protruding connecting rod, a pulley attached to the other end of the connecting rod via a spring, and a gear mechanism for decelerating the rotational force of the rotating cylindrical body and transmitting it to the rotating disk. A cable storage device characterized by: