JPH0429604Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a compression band device for compressing a region to be imaged during X-ray imaging.

(Prior art) In order to reduce the leakage of secondary rays as much as possible during X-ray imaging and to ensure the clarity of the image, a device called a compression band is used that compresses the area to be imaged to reduce its thickness. However, the structure is such that the distal end side of the band body pulled out from a winding device fixed to one side of the bed is locked to the other side of the bed, and the proximal end side of the band body is pulled out by the winding device. The object to be imaged is compressed by winding up the camera, and a ratchet mechanism is used as the winding device.

(Problem that the invention aims to solve) However, since conventional compression bands use a ratchet mechanism as a winding device, the manufacturing cost of the gears increases, which increases the cost of the entire device and reduces pressure. The disadvantage was that the force was adjusted in stages, making it impossible to finely adjust the compression force in the middle.

In addition, for subjects whose bodies are under pressure, the sound of the ratchet claws engaging can be heard eerily, creating a feeling of pressure, which is inconvenient, and when releasing the pressure, the handle must be used to move the winding shaft further in the winding direction. Since the ratchet pawl must be opened by rotating the winding shaft in the winding direction, there is a drawback that a feeling of pressure increases due to further rotation of the winding shaft in the winding direction.

The purpose of this invention is to eliminate the above-mentioned conventional drawbacks,
It is an object of the present invention to provide a compression band device which can reduce the cost of the entire device, is easy to operate, and allows stepless compression adjustment.

(Means for Solving the Problems) The compression band device according to the present invention includes a take-up shaft for winding up the compression band by operating a handle, and a locking means for locking the rotation of the take-up shaft in the unwinding direction. and a switching mechanism for switching between locking and unlocking by pushing in or pulling back the knob, the retracting shaft is shaped like a pipe, and the inside thereof has a knob fixed to the end of the shaft. A slide shaft that slides when pushed or pulled back is disposed through the housing, and a housing that slides in cooperation with the slide shaft is provided on the bearing stand side of the winding shaft, and its operation is controlled by a click mechanism. A roller bearing type one-way clutch is disposed within the housing, and the shaft end of the winding shaft is inserted into the housing, and the stroke of the slide shaft is adjusted to the above-mentioned position. The length is set to approximately half the length of the rollers that make up the one-way clutch.

(Function) When the winding shaft of the winding device fixed to one side of the X-ray imaging bed is locked from rotating in the unwinding direction by a roller bearing type one-way clutch, When you slide the slide shaft located inside the take-up shaft, the switching mechanism releases the lock and allows it to rotate freely, so you can pull out the band body from the take-up shaft, cover the area to be photographed, and lock its tip. Lock the metal fittings to the other side of the bed.

When the slide shaft is slid in the other direction by operating the knob, the one-way clutch is activated by the switching mechanism, and the rotation of the winding shaft in the unwinding direction is locked. It is possible to press the area to be photographed by winding it up.
Even if a hand is released from the handle at a position where a predetermined compression state is obtained, the winding shaft remains at that position without being rewound.

If you want to apply more pressure when adjusting the pressure, simply rotate the handle, but even if the take-up shaft is slightly rotated at this time, the locking means is a roller bearing type one-way clutch.
The winding shaft is locked steplessly. In addition, when unwinding when adjusting or releasing pressure, apply a slight load to the winding shaft in the winding direction using the handle, and then slide the slide shaft smoothly. This allows the switching mechanism to The lock of the one-way clutch to the winding shaft is released. In addition, when adjusting the pressure for rewinding, after rewinding to a predetermined position with the lock released, slide the knob in the other direction to lock it again at that position.

(Example) An example of the compression cuff device according to the present invention will be described based on the drawings. FIG. 1 is a partially removed external perspective view, FIG. 2 is a partially sectional front view, and FIGS. Fig. 4 is an enlarged sectional view showing the bearing portion of the winding shaft, Fig. 5 is an enlarged sectional view showing the one-way clutch in an operating state, Fig. 6 is an enlarged sectional view showing the one-way clutch in an inoperative state, and Fig. 7 is a right side view. , FIG. 8 is a cross-sectional view taken along the line A-A in FIG. 4, FIG. 9 is a partially removed perspective view showing how the band body is attached to and removed from the winding shaft, and FIG. 10 is a diagram showing the configuration of the tip of the band body. FIG. 2 is an exploded perspective view with a portion removed.

In the figure, A shows the entire compression cuff device, and the band main body 30 is pulled out from the winding device 1 fixed to one side 1B of the bed B for X-ray photography, and the distal end side 3
With the locking fitting 40 of No. 2 locked to the locking portion on the other side 2B of the bed, the base end 31 of the band main body 30 is wound up by the winding device 1 to compress the area to be photographed. It is configured to do so.

In the present invention, the configuration of the winding device 1 includes a lock on the shaft end side of the winding shaft 2, which is rotated by rotating the handle 12, to prevent the winding shaft 2 from rotating in the unwinding direction. A one-way clutch 20 is disposed for the winding shaft 2, and a slide shaft 3 is disposed within the winding shaft 2 so as to be slid by pushing or pulling back the knob 13, and switching is made by sliding the slide shaft 3. The one-way clutch 20 is configured to be activated or deactivated using a mechanism 4.

To explain the above structure in detail, the winding shaft 2 is constructed by fitting and fixing shaft end members 5 and 6 to both ends of a pipe-shaped shaft main body. A drive arm 10 having a handle 12 is fixed to one shaft end member 5, and the winding shaft 2 is rotated by operating the handle.

The slide shaft 3 is arranged to pass through the inside of the winding shaft 2, and is located on the side where the handle 12 is arranged (the second
It slides by pushing or pulling back a knob 13 fixed to the shaft end (on the right side of the figure).

The one-way clutch 20 is of a well-known roller bearing type, and to explain the relationship between this and the switching mechanism 4, a support stand 14 is fixed to the bearing stand 9 side. A housing 15 that accommodates the one-way clutch 20 is slidably arranged. By fixing the tip of the slide shaft 3 to the housing 15, the slide shaft 3 slides by a stroke l in cooperation with the slide shaft 3.
8 holds its working and non-working positions. That is, the ball 16, which is disposed on the support stand 14 side by a spring 17 so as to be freely protrusive and retractable, is attached to the housing 15.
It is click-locked by fitting into two fitting recesses 19 formed on the bottom surface side.

As schematically shown in FIG. 8, the one-way clutch 20 has a structure in which a roller arrangement part having a slope 21 is formed in a divided manner inside the race, and a large number of rollers 22 are arranged in each part. , into which the shaft end portion 23 of the winding shaft 6 is inserted. Further, the stroke l is set to approximately half the length of the roller 22, and on the other hand, the shaft end portion 23 of the shaft end member 6 of the winding shaft 2 has a small diameter portion 24 formed on the tip side. The length of the small diameter portion 24 is approximately equal to the stroke l.

When the slide shaft 3 is in the state shown in FIG. 5, the one-way clutch mechanism 20 is operating, but when the slide shaft 3 is pushed into the position shown by the imaginary line 15' in FIG. 5, it is in the state shown in FIG. In this state, each roller 22 moves to the position of the small diameter portion 24 of the shaft end 23 and rotates idly. In this state, the one-way clutch 20 is inactive and the slide shaft 3 is moved in the winding direction. (2F direction) and rewind direction (2F direction).

Next, when the slide shaft 3 is pulled back to the state shown in FIG.
becomes operational. In addition, in the figure, 26 is a cover that covers the entire switching mechanism 4.

In the configuration described above, the one-way clutch 20 is deactivated by pushing in the knob 13, allowing the take-up shaft 2 to rotate freely, and is activated by pulling back the knob. It goes without saying that the actuator may be actuated by twisting the actuator and deactivated by pulling it back.

The winding device 1 configured as described above is placed on the bed B.
In the illustrated example, the mounting bracket 27 for fixing to the bed B has a substantially "U"-shaped cross section, but the mounting form itself differs depending on the shape of the mounting bracket provided on the bed B. Furthermore, conventionally, as a means for fixing the base end 31 of the band body 30 to the winding shaft 2, a slit was formed in the winding shaft 2 and the base end was inserted into this. It was a hassle.

Therefore, in this invention, as shown in Figure 9,
One cloth piece 28 of the loop fastener is attached to the outer periphery of the winding shaft 2, and the other cloth piece 29 is attached to the belt main body 3.
The band body is sewn to the base end 31 of the band 0 so that the band main body can be easily attached and detached. Since the base end of the band main body 30 is wound around the winding shaft 2 and is not unwound to the base end in a normal form, attachment using a loop fastener is sufficient.

Furthermore, since the band body comes into direct contact with the body, it must be clean, but the conventional locking metal fittings placed at the tip of the band body 30 are fixed to the tip 32 of the band body 30. Therefore, even if the proximal end of the band body is removed, the band body cannot be washed as it has a locking metal fitting at the tip, and for this reason, even if the band body becomes dirty, it is still used as is. be.

Therefore, in the present invention, as shown in FIG. 10, bearing parts 41 are formed at both ends of the locking metal fitting 40, and a shaft insertion part 33 is formed at the tip of the band main body 30, and a shaft pin 42 is inserted through it. The belt main body 30 can be washed as a whole by removing the base end 31 from the winding shaft 2 and also removing the locking fitting 40 on the front end side. Note that there are many cases in which metal fittings for mounting the take-up device and metal fittings for engaging the locking metal fittings are arranged on both sides of the bed B, and since both fittings usually have a symmetrical shape, In the embodiment, the shape of the locking metal fitting 40 corresponds to the shape of the mounting metal fitting 27 described above. However, the shape of this locking metal fitting also differs depending on the bed.

(Effect of the invention) According to the compression band device according to the invention, since the locking means for locking the rotation of the winding shaft in the unwinding direction on which the compression band is to be wound is a roller bearing type one-way clutch, the winding The shaft can be locked steplessly.

Further, the take-up shaft has a pipe shape, and a slide shaft is disposed inside the winding shaft to be slid by pushing in or pulling out a knob, and a housing in which the one-way clutch is housed is arranged along with the slide shaft. The one-way clutch is adapted to move and slide, and its operating and non-operating positions are held by a click mechanism, and the stroke of the slide shaft is approximately half the length of the roller constituting the one-way clutch. Since it is set to , by sliding the slide shaft by operating the knob, you can very smoothly switch the direction of rotation of the take-up shaft to free or lock the rotation in the rewind direction. Moreover, it is possible to reliably hold the slid position.

As mentioned above, the winding operation of the band body and the unwinding operation during compression adjustment are easy, and the compression adjustment can be made steplessly, allowing for fine adjustments. Since it is not used, it has excellent effects such as being able to reduce manufacturing costs.

[Brief explanation of drawings]

The drawings show an embodiment of the compression band device according to the present invention, in which Fig. 1 is a partially removed perspective view of the exterior, Fig. 2 is a partially sectional front view, and Figs. 3 and 4 show the bearing of the winding shaft. FIG. 5 is an enlarged sectional view showing the one-way clutch in an operating state, FIG. 6 is an enlarged sectional view showing the one-way clutch in an inoperative state, FIG. 7 is a right side view, and FIG. 8 is an enlarged sectional view showing the one-way clutch in an inoperative state. FIG. 9 is a partially removed perspective view showing how the band body is attached to and removed from the winding shaft, and FIG. 10 is a partially removed exploded perspective view showing the configuration of the tip of the band body. It is. A... Entire compression band device, B... Bed, 1...
Winding device, 2... Winding shaft, 3... Slide shaft, 4
...Switching mechanism, 12...Handle, 13...Knob, 15...Housing, 18...Click mechanism, 20...One-way clutch.

Claims (1)

[Scope of Claim for Utility Model Registration] A winding shaft for winding up a compression band by operating a handle, a locking means for locking the rotation of the winding shaft in the unwinding direction, and a push-in or pull-back operation of a knob. In the compression band device equipped with a switching mechanism for switching between locking and unlocking, the take-up shaft is pipe-shaped, and inside thereof is a slide shaft that slides by pushing or pulling back a knob fixed to the end of the shaft. is disposed so as to pass through the winding shaft, and a housing is provided on the bearing stand side of the winding shaft and slides in cooperation with the slide shaft, and the operating position and non-operating position thereof are maintained by a click mechanism. A roller bearing type one-way clutch is disposed within the housing, and the shaft end of the winding shaft is inserted into the housing, and the stroke of the slide shaft constitutes the one-way clutch. A compression band device characterized in that the length is set to approximately half the length of the roller.