JPH0215460Y2 - - Google Patents

Description

[Detailed explanation of the invention] a. Purpose of the invention (field of industrial application) The therapeutic traction machine according to this invention is used in orthopedic departments of hospitals, etc. to treat whiplash or spinal injuries caused by traffic accidents or other causes. Used to treat injured patients.

(Prior Art) When treating whiplash or spinal injuries caused by traffic accidents or other causes, a therapeutic traction machine is used to stretch and stretch the injured area. Such a traction machine is used in conjunction with a treatment device as shown in FIG. The treatment device shown in Fig. 3 is equipped with two sets of treatment traction machines 1, 1, each of which is connected to a rope, so that whiplash treatment and spine treatment can be performed at the same time. I'm trying to pull 2,2. The end of the rope 2, which is pulled by a traction machine for whiplash treatment, hangs downward from a pulley 4 installed above the chair 3, and a tool 5 installed at the end is placed against the patient's chin and pulled upward. I'm trying to pull it. Furthermore, a locking device 6 that locks onto the patient's shoulder is provided at the end of the rope 2 that is pulled by a traction machine for spinal treatment. The patient undergoing spinal treatment lies on the bed 7, fixes the lower back with the restraint 8 provided at the end of the bed 7, and stretches the spine by pulling the shoulders with the above-mentioned locking device 6 at the end of the rope. I have to. In addition, in any treatment, the force with which the rope 2 is pulled by the traction machine 1 is changed over time as shown in FIG. 4.

By the way, the therapeutic traction machine 1 that is incorporated into such a therapeutic device and pulls the rope 2 has conventionally been a fifth
It was configured as shown in Figure 6. That is, the clutch piece 12 is externally fitted onto a shaft 11 which is rotated at low speed by a motor 9 via a worm reducer 10 so that it can freely slide only in the longitudinal direction of the shaft 11. A pin 19 is provided on the side of this clutch piece 12,
19 is planted, and this clutch piece 12
An annular groove 13 formed on the outer circumferential surface of the annular groove 13 has one end pivoted by a fixed shaft 14, and a spring 15 applying tensile elasticity to the other end, which tends to rotate counterclockwise in FIG. The middle portion of the rod 16, which is provided with a cylindrical shape, is engaged. The other end of the rod 16 is pivotally connected to the end of a tension rod 18 of a solenoid 17.
This solenoid 17 moves the tension rod 18 to the sixth position when energized.
This is to rotate the rod 16 clockwise in FIG. 6 by pulling it upward in the figure. A bearing 20 is located coaxially with the shaft 11 driven by the worm reducer.
A sprocket 22 and a swing arm 23 are rotatably provided on a shaft 21 which is rotatably supported by a sprocket 22 and a swing arm 23, respectively. A sprocket 22 provided at the end of the shaft 21 at a position facing the clutch piece 12 is integrally provided with a clutch receiver 25 having holes 24, 24 into which the pins 19, 19 of the clutch piece 12 are fitted. . Further, a shaft 27 is provided on the side surface of one end of the swinging arm 23, which rotatably supports a drum 26 around which the rope 2 is wound. A sprocket 28 is fixed to the side surface of the drum 26, and this sprocket 28 and the sprocket 2
Chain 29 is spanned between 2 and 2. Furthermore, a fifth swing arm 23 is attached to the other end of the swing arm 23.
A spring 30 that attempts to rotate clockwise in the figure;
A displacement meter 31 for detecting the amount of rotation of the swinging arm 23 is provided.

When treating a patient using a conventional therapeutic traction machine configured in this way, first the solenoid 1 is
7 is energized, the clutch piece 12 is moved upward as shown in FIG. 5 or the locking tool 6 is locked to a predetermined part of the patient. The drum 26 has a built-in spring that rotates the drum 26 in the direction of winding the rope 2, so if you let go of the rope 2 after locking the tool 5 etc. in a predetermined position, the rope 2 is wound around the drum 26 with a weak force and tensioned. Once the tool 5 etc. is locked, the power to the solenoid 17 is stopped and the clutch piece 1 is closed.
2 and the clutch receiver 25 are engaged, and the motor 9 is energized. When the motor 9 is energized, the drum 26 moves through the worm reducer 10, shaft 11, clutch piece 12,
Clutch receiver 25, sprocket 22, chain 2
9. It is rotated slowly and with a strong force through the sprocket 28, and the rope 2 is pulled strongly. The swinging arm 23 provided with a shaft 27 for pivotally supporting the drum 26 is rotated by a spring 30 at an angle proportional to the force pulling the rope 2.
It rotates counterclockwise in FIG. 5 against the elastic force of . Therefore, once the swinging arm 23 has rotated by an angle corresponding to a predetermined traction force, the power supply to the motor 9 is stopped, and the rope 2 is continued to be pulled with a constant traction force, and after a predetermined period of time, the motor 9 is turned off.
is reversed to weaken the traction force, and this process is repeated a predetermined number of times.

(Problems to be Solved by the Invention) However, the conventional therapeutic traction machine constructed and used as described above has the following disadvantages.

That is, the swinging arm 2 provided to detect the traction force
3 is arranged laterally, the installation area of the towing machine is large, making it difficult to install it in a narrow place.

In view of these circumstances, the present invention aims to provide a therapeutic traction machine that requires a small installation area.

b. Configuration of the invention (means for solving the problem) The therapeutic traction machine of the invention is constructed as shown in FIGS. 1 and 2.

That is, the output shaft 32 of the worm reducer 10 driven by the motor 9 is connected to the casing 3 of the reducer 10.
Rotatably supported by two bearings 35, 35 protruding from both sides of the base 34 and provided on the upper surface of the base 34,
An electromagnetic clutch device 3 is located in the middle of this output shaft 32.
7 drive unit is fixed. Further, a drum 26 for winding up the rope 2 is rotatably fitted to the output shaft 32, and a driven portion of an electromagnetic clutch device 37 is fixed to the side surface of the drum 26.

On the other hand, one end of a swinging arm 39 that can swing together with the casing is fixed to one side of the casing 33 of the worm reducer 10, to which the motor 9 is attached and which is rotatable together with the motor 9 about the output shaft 32. There is. A spring 38 is attached to the other end of the swing arm 39 to pull the swing arm 39 and rotate it clockwise in FIG. That is, as shown in FIG. 1, the rope 2 for pulling the tool 5 etc. (FIG. 3) is wound around the drum 26 from the right side of the output shaft 32, and the swinging arm 39 is fixed to the left side of the casing 33. In this case, the spring 38 is either a tension spring that pulls the swing arm 39 upwards or a compression spring that pushes the swing arm upwards. Conversely, when the swing arm 39 is fixed to the right side of the casing 33, the spring 38 pushes or pulls the swing arm downward. In this way, the elasticity of the spring 38 will act in the direction of pulling the rope 2 wound around the drum 26.

(Function) The action of the therapeutic traction machine of the present invention configured as described above is as follows.

Prior to treatment, the electromagnetic clutch device 37 is switched to disconnect the output shaft 32 of the worm reducer 10 and the drum 26, the rope 2 is pulled out, and the tool 5 or the locking tool 6 is attached to a predetermined part of the patient. This is the same as in the case of the conventional therapeutic traction machine shown in FIGS. 5 and 6. Although not shown in the drawings, the drum 26 incorporated in the therapeutic traction machine of the present invention also has a built-in spring for winding the rope 2, so that once the tool 5 etc. are attached and the user releases the rope 2, This rope 2
is wound around the drum 26 with a weak force.

When the rope 2 is wound up to such an extent that no slack is removed, the electromagnetic clutch device 37 is switched to the connected state, the motor 9 is started, the drum 26 is rotated at a low speed, and the rope 2 is wound up with a strong force. As the traction force applied to the rope 2 increases, the rope 2 pulls the casing 33 of the worm reducer 10,
The force to rotate the casing 33 about the output shaft 32 increases, and the casing 33 rotates counterclockwise in FIG. 1 against the elasticity of the spring 38. As the casing 33 rotates, the drive arm 41 of the displacement meter 31, which is connected via the swing arm 39 and the rod 40, rotates counterclockwise in FIG. rope 2
As the traction force of the rope 2 increases, the spring 38 is pulled downward via the drum 26, casing 33, and swing arm 39, and since the elasticity of the spring 38 at this time is proportional to the traction force of the rope 2, the spring 38 The rod 4 attached to the swinging arm 39 adjusts the amount of downward displacement of the lower end.
0 from the displacement meter 31, the traction force of the rope 2 can be known. So this displacement meter 3
When the amount of rotation of the drive arm 41 of the rope 1 becomes large enough to match the traction force to be applied to the rope 2, the motor 9 is stopped, and after maintaining the same traction force for a certain period of time, the motor 9 is reversed and the traction force is increased. Make smaller.

(Application Example) In the illustrated embodiment, the electromagnetic clutch device 37 that controls the connection and disconnection between the worm reducer 10 and the drum 26 is different from that of the conventional traction machine shown in FIGS. . In the case of the conventional clutch device mentioned above, it remains connected during a power outage, but if there is a power outage due to a fire or an earthquake, and it is necessary to evacuate, a rope is used to tightly pull a part of the patient's body. If the traction force 2 remains as it is, it will be difficult for the patient to escape on his or her own, so this is to avoid such a danger.

That is, as shown in detail in FIG. 7, the electromagnetic clutch device 37 incorporated in the illustrated therapeutic traction machine has an iron ring 42 formed on one side of the drum 26 with corrugated irregularities extending in the radial direction. The iron ring 42 and the drum 2
6 is rotatably fitted on the output shaft 32 of the worm reducer, and furthermore, the iron ring 42 is attached to the drum 26.
It is possible to freely move near and far. On the other hand, at a position facing the iron ring 42 in the middle of the output shaft 32, a fixing piece 43 is provided on the surface facing the iron ring 42 with wave-shaped unevenness that closely fits with the above-mentioned unevenness. It is fixed against. An electromagnetic coil 4 is fitted to the fixed piece 43 via a bearing 44, and a holding piece 45 fixed to a frame etc.
6 is provided.

When switching the electromagnetic clutch device 37 to the connected state, when the iron ring 42 is pulled by energizing the electromagnetic coil 46, the unevenness of the iron ring 42 and the fixed piece 43 mesh with each other, and the output shaft 3
The iron ring 42 together with the fixed piece 43 that rotates together with the iron ring 42
The drum 26 on which the drum 26 is mounted rotates.

Furthermore, if an attempt is made to rotate the drum 26 by pulling the rope 2 while the electromagnetic coil 46 is not energized, the surface of the corrugated concavities and convexities that mesh with each other when the electromagnetic coil 46 is energized will move the iron ring 42 toward the drum 26. Due to the elasticity of the return spring 36, the iron ring 42 and the drum 26 become rotatable relative to the output shaft 32. Therefore, in the event of a power outage, the traction force of the rope 2 is automatically weakened, making it easier for the patient to escape on his own.

c. Effects of the invention The therapeutic traction machine of the invention is constructed and operates as described above, but since it is constructed without using any members with particularly large lateral lengths, the installation area is small and it is suitable for narrow spaces. It is also easy to install.

[Brief explanation of drawings]

FIG. 1 is a side view showing the therapeutic traction machine of the present invention;
Fig. 2 is a view seen from the right side of Fig. 1, Fig. 3 is a side view of the treatment device incorporating the traction machine, Fig. 4 is a diagram showing changes in traction force during treatment, and Fig. 5. 6 is a side view of a conventional traction machine, FIG. 6 is a sectional view taken along line A-A in FIG. 5, and FIG. 7 is a sectional view of an electromagnetic clutch device. 1... therapeutic traction machine, 2... rope, 3... chair, 4... pulley, 5... tool, 6... locking tool,
7... Bed, 8... Holder, 9... Motor, 1
0... Worm reducer, 11... Shaft, 12... Clutch piece, 13... Groove, 14... Shaft, 15... Spring, 16... Rod, 17... Solenoid, 18
...Tension rod, 19...Pin, 20...Bearing, 21
... shaft, 22 ... sprocket, 23 ... rocking arm, 24 ... hole, 25 ... clutch receiver, 26 ...
Drum, 27...Shaft, 28...Sprocket, 2
9...Chain, 30...Spring, 31...Displacement meter,
32... Output shaft, 33... Casing, 34...
Base, 35...bearing, 36...return spring, 37...electromagnetic clutch device, 38...spring,
39... Swinging arm, 40... Rod, 41... Driving arm, 42... Steel ring, 43... Fixed piece, 44... Bearing, 45... Holding piece, 46... Electromagnetic coil.

Claims (1)

[Scope of utility model registration request] The output shaft 32 of the worm reducer driven by the motor 9 is made to protrude from both sides of the worm reducer casing 33 to which the motor 9 is attached.
A driving part of an electromagnetic clutch device 37 is fixed to the output shaft 32, and a driven part of the electromagnetic clutch device is connected to the output shaft 32.
The casing 3 is fixed to the side surface of the drum 26 which is rotatably fitted to the casing 3 and has one end fixed to one side surface of the casing 33 which is swingable about the output shaft 32.
3, a spring 38 is attached to the other end of the swinging arm 39 which can swing freely together with the drum 26, and a displacement meter 31 is installed to detect the amount of displacement of the swinging arm 39. A medical traction machine connected to a swinging arm 39.