JP2003265549A - Drive roll for tensioning rigging - Google Patents

Abstract

(57) [Summary] Even if lubricating oil adheres to a twisted rope with a small rope made of cotton yarn, hemp yarn or chemical fiber yarn, the rope can be fed out via a guide roll. A driving roll (1) in a means (B1) for clamping a rope between a pressing roll (2) and a driving roll (1) and rotating the driving roll (1) to feed the rope (3) to tension the rope (3) on the non-delivery side. Is provided with a cutting edge 21 that enters the concave portion 22 of the rope 3 immediately before being pinched,
At the moment when the cutting edge 21 and the rope 3 collide, the cutting edge 2
1 pushes down the lower slope of the recess 22,
The rope 3 can be fed out via a guide roll.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tensioning means for a cord, which relates to a care assist device.

[0002]

2. Description of the Related Art Conventionally, as a nursing assistance device for changing the body position of a patient by vertically moving a cord, Japanese Patent Application No.
There is a care assistance device according to 225178.

FIG. 8 shows a partial cross-sectional front view of a care assisting device according to Japanese Patent Application No. 2001-225178. In the conventional care assisting device, one side end of a sheet on which a patient is placed is referred to as a lower end of a rope. Tilt the patient near 45 degrees by connecting and lifting the lower end of the rope, then raise the patient sideways by the caregiver grasping and pulling on the end of the rope or seat while lowering the lower part of the rope. It is something that can be set up.

In order to slowly return the patient standing sideways to the original state after standing the patient sideways with the conventional care assisting device, lean the patient against the seat and "raise the rope. "Below" must be lowered. In addition, in order to roll a patient standing sideways and lay it on his back like in the original state, lower the lower end of the rising rope before rolling the patient and spread the seat back to the original state. There must be.

When the "lower end of the rope being raised" is lowered, the rope is pulled downward by the weight of the patient when the patient leans against the seat as in the former case. Guided by the guide roll, the lower end of the guide roll descends smoothly.

In the conventional care assisting device, like the former case, even if the upper part of the rope is continuously loosened in a state where the rope is not pulled downward by the weight of the patient, the rope above the guide roll slackens and stays. For this reason, a tensioning means D1 and a tensioning means D2 for tensioning the rope above the guide roll are provided so that the situation in which the rope below goes down does not occur. Therefore, even if the rope is not pulled downward by the weight of the patient, the lower end of the rope can be smoothly lowered.

However, since each of the tensioning means D1 and the tensioning means D2 has a structure in which the rope is pinched by the pressing roll and the driving roll 32, when the lubricating oil leaks, the lubricating oil adheres to the rope. I have something to do.

In order to directly contact the caregiver and the patient, the rope is twisted with a material that is light and comfortable to touch from the viewpoint of safety, for example, a twisted rope made of cotton thread, hemp thread or chemical fiber thread. Are used. Therefore, if the lubricating oil adheres to the rope, the rope will be impregnated with the lubricating oil by a capillary phenomenon.

For this reason, in the rope to which the lubricating oil has adhered, the drive roll 32 slips even if the surface of the drive roll 32 is carved with knurls or the gear-like fine grooves are provided, and the rope is moved downward. There is a problem that the rope has to be replaced with a rope to which no lubricating oil adheres, because the rope is no longer fed out and malfunctions.

[0010]

[Problems to be solved] Even if the lubricating oil adheres to a rope twisted with a small rope made of cotton thread, hemp thread or chemical fiber thread, the rope can be fed out through a guide roll. .

[0011]

Means for Solving the Problems A rope is pinched by a pressing roll and a drive roll, and the drive roll in a means for tensioning the rope on the opposite payout side by paying out the rope by the rotation of the drive roll, A blade tip is provided to enter the concave portion of the rope on the verge of being clamped, and the blade tip pushes down the lower slope of the concave portion so that the rope is fed out via the guide roll.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic view of a tensioning means B1 using a drive roll of the present invention, in which 1 is a drive roll, 2 is a pressing roll, 3 is a rope, and 11 is a decelerating member. It represents a motor with a machine, the rope 3 is clamped by the drive roll 1 and the pressing roll 2, the drive roll 1 is fixed to the output shaft 18 of the motor 11 with a speed reducer, rotates in the direction in which the rope 3 is paid out, and is pressed. The roll 2 presses the rope 3 against the drive roll 1 by the extension force of the spring 12 via the shaft 15 and the bearing 16.

FIG. 2 shows the relationship among the driving roll 1, the rope 3 and the pressing roll 2 according to the present invention, whereas the position of the output shaft 18 of the driving roll 1 is fixed.
The pressure roll 2 follows the movement of the contact position between the rope 3 and the drive roll 1 and moves toward and away from the drive roll 1.

The drive roll 1 has a plurality of blades (19a, 19b, 19c, 19) as shown in FIG.
d) and the rotating body 17 which is the roll body, and each blade 19 projects from the outer peripheral surface 33 of each rotating body 17 in the tangential direction to the rotating shaft 18 and is fixed by a bolt 20.

Since the rope 3 is made by twisting a small rope made of cotton thread, hemp thread or chemical fiber thread, the ropes are spirally formed into a recess 22 between the small ropes over the entire length. The top is a convex portion 23 and is located in a spiral shape.

FIG. 3 shows a state in which the rope 3 is clamped between the blade 19 and the pressing roll 2 of the drive roll 1 of the present invention. In the drive roll 1, as shown in FIG. 3, the rotating body 17 has a substantially square shape, and the blade edge 21 of the plate-shaped blade 19 has the outer peripheral surface 3 of each rotating body 17.
3 in the tangential direction to the output shaft 18, and when the lower slope 25 of the concave portion 22 of the rope 3 is pinched by the blade edge 21 and the pressing roll 2, the upper portion of the blade edge 21 has the concave portion 22. It does not come into contact with the upper slope 24 of the.
It should be noted that the rotating body 17 is not limited to being a substantially quadrangular shape, and may be a substantially triangular shape of any of a substantially triangular shape and a substantially hexagonal shape.

When the upper part of the cutting edge 21 comes into contact with the upper sloped surface 24 of the concave portion 22 of the rope 3, the upper sloped surface 24 is pushed away by the rotation of the cutting edge 21, so that the feeding force of the rope 3 is impaired. Each blade 19
The upper part of the cutting edge 21 at is not contacted with the upper slope 24 of the recess 22.

Since the drive roll 1 has the above-mentioned structure,
When the output shaft 18 of the motor 11 with a speed reducer rotates, the pressing roll 2 is released via the rope 3 every time the cutting edge 21 of the blade 19 comes into contact with either the convex portion 23 or the concave portion 22 of the rope 3. . And the pressing roll 2 is the rope 3
Each time the cutting edge 21 of the blade 19 abutting against the rope 3 separates from the rope 3, the rope 3 approaches the drive roll 1 while pushing the rope 3 with the extension force of the spring 12.

For this reason, the blade edge 21 of the rotating blade 19 collides with the rope 3 which is pushed and approaches the drive roll 1. Therefore, the rope 3 is impacted and the blade edge of the blade 19 is impacted. It will be pinched by 21 and the press roll 2.

When the cutting edge 21 of the blade 19 collides with the lower slope 25 of the concave portion 22 of the rope 3, as shown in FIG. 3, the lower slope 25 is recessed and the lower slope 25 thereof is depressed.
Therefore, a large frictional resistance is instantaneously generated between the blade edge 21 and the rope 3.

Therefore, even if the rope 3 is impregnated with lubricating oil, the rope 3 is slack and is not restrained, so that the blade edges 21 of the rotating blades 19 momentarily have a large frictional resistance. At the same time as it occurs, the concave portion 2 of the rope 3
Since the lower slope 25 of 2 is pushed downward, the rope 3 is fed out although the length is a little.

Although the length of the rope 3 which the blade edge 21 of the single blade 19 feeds is short, the drive roll 1 equipped with the blade 19 rotates and feeds intermittently little by little. Can be offered.

The number of blades 19 in the drive roll 1 is four in this embodiment, but the number of blades 19 is not limited to four. It is determined by factors such as the separation speed, the approaching speed, the rotation speed of the blade 19, the rotation radius of the cutting edge 21, and the like. From the experimental results, the rope 3 has the blade 19
When the number of is within the range of 3 to 6, it is sometimes stably fed.

In FIG. 4A, the blade 29 is connected to the output shaft 18
On the other hand, the relationship between the drive rolls provided in the radial direction and the rope 3 is represented, and the blades 29 provided in the radial direction are in contact with the rope 3 substantially.

FIG. 4B shows the relationship among the blade 29, the rope 3 and the pressing roll 2 when the blade 29 provided in the radial direction is rotated.
While pressing the pressing roll 2, the surface of the rope 3 is slid and rotated. Immediately before leaving the rope 3, the blade 29 pushes the rope 3 away while stroking the surface of the rope 3 which is slippery with lubricating oil, as indicated by the solid line in the figure. Immediately after the blade 29 separates from the rope 3, the next blade 29 contacts substantially along the rope 3 approaching the drive roll, as indicated by the chain double-dashed line in the figure.

Therefore, the blades 2 provided in the radial direction
No. 9 cannot generate any special force for paying out the rope 3 downward from the rope 3 which is slippery by the lubricating oil.

On the other hand, since the blade 19 of the drive roll 1 of the present invention is provided in the tangential direction to the output shaft 18, the lower slope of the concave portion 22 of the rope 3 is recessed so that the rope 3 is It has a special feature of generating a force in the payout direction, and is significantly different from the blades 29 provided in the radial direction.

In addition to the structure in which the blade 19 is provided tangentially to the output shaft 18 as shown in FIG. There is a drive roll 26 of the present invention shown in a).

FIG. 5A shows the relationship among the driving roll 26, the rope 3 and the pressing roll 2 of the present invention.
As shown in the drawing, the drive roll 26 has an arcuate outer peripheral surface 34 and a height from the outer peripheral surface 34 that abuts above the lower slope 25 of the recess 22 of the rope 3. The blades 27 having the corner ridges 28 are alternately arranged in the circumferential direction.

Therefore, if the rope 3 is impregnated with the lubricating oil, the drive roll 26 holds the rope 3 between the arcuate outer peripheral surface 34 and the pressing roll 2 while the outer peripheral surface 34 is being pressed. I slip around and turn around.

In FIG. 5B, the drive roll 26 rotates,
The situation where the blade 27 protruding from the arcuate outer peripheral surface 34 reaches the rope 3 and collides with the lower slope of the concave portion 22 at the portion where the angular ridge 28 at the tip of the blade 27 begins to be clamped is shown. There is.

The horizontal component force acting on the pressing roll 2 due to the collision is small because the collision direction is tangential to the pressing roll 2. Therefore, the rope 3 at the moment of collision is scraped off from the corner edge 28 of the tip of the blade 27 before being pushed away.

Therefore, immediately before the blade 27 is squeezed by the arc-shaped outer peripheral surface 34 of the drive roll 26 and the pressing roll 2, the lower slope 25 of the recess 22 of the rope 3 is momentarily recessed, and Since a rotational force is applied to the concave portion, a force in the unwinding direction is momentarily applied to the portion of the rope 3 that is being pressed.

Since the rope 3 is slack and is not restrained, the frictional resistance of the portion of the rope 3 being pinched is reduced by the lubricating oil impregnated in the rope 3, so Due to the momentary force in the unwinding direction, the rope is slightly unwound.

Therefore, the rope 3 is intermittently and gradually extended by continuing to rotate the drive roll 26, so that the slack portion of the rope 3 is sequentially extended.

The number of blades 29 provided on the drive roll 26 is four in this embodiment, but the number is not limited to four, and an appropriate number is determined by the radius of the outer peripheral surface 34 and the rotation speed. From the experimental results, the rope 3 is stably fed out when the number of the blades 29 is in the range of 3 to 5.

The corner edge 28 of the blade 27 in the drive roll 26 of the present invention has the blade 2 provided in the radial direction.
9 does not generate a force in the direction in which the rope 3 slides in the concave portion 22 of the rope 3 but does not generate a force in the direction of extending to the rope 3, but it is a special case in which the lower slope of the concave portion 22 of the rope 3 is concave to generate a force in the direction of extending in the rope 3. Therefore, it is significantly different from the blades 29 provided in the radial direction.

[0038]

[Embodiment 1] FIG. 6 is a partial sectional front view of a care assisting device A using a tensioning means B1 and a tensioning means B2 provided with a drive roll 1 of the present invention.

In the care assisting device A, even if the pulling nut 10 is rotated to the motor 8 side with the reduction gear and brought closer to the motor 8 side, the rope 3 above the guide roll 5 is moved above the guide roll 6 by the tensioning means B1. The rope 4 in is the tension means B
The rope 3 and the rope 4 do not slack because they are fed downward by 2.

FIG. 7 (a) shows a sketch of the tensioning means B1, in which the curved ⇒ indicates the rotation direction of the drive roll 1, the straight line ⇒ indicates the unwinding direction of the rope 3, and the straight line →
And ← indicate the moving direction of the pressing roll 2.

The pulling nut 10 is moved to the side of the motor 8 with the anti-reduction gear by reversing the screw rod 9 to move the rope 3 and the rope 4 together.
When the rope 3 is lifted, the rope 3 pushes the pressing roll 2 away from the drive roll 1 like the tensioning means B1 shown in FIG. 7B, and the rope 4 also moves in the same manner as the tensioning means B1. The pressing roll 2 of the tension means B2 is pushed to separate from the drive roll 1.

Therefore, when the ropes 3 and 4 are separated from the respective drive rolls 1 under load,
Since the drive rolls 1 are not scratched, the drive rolls 1 are not abraded, so that the service life is extended. Even when the drive roll 26 is required, the rope 3 and the rope 4 similarly have the effect of extending the life.

[0043]

[Effect] The drive roll 1 and the drive roll 26 of the present invention
Since the rope 1 is fed downward with the above configuration and principle, whether the rope 1 is impregnated with lubricating oil or not, the rope 1 is pinched by the pressing roll 2 You can go to.

Therefore, the tensioning means B1 and the tensioning means B2 which require the driving roll 1 of the present invention can be applied to the care assisting device A shown in FIG. The failure caused by the leakage of is eliminated. Further, the drive roll 26 of the present invention is replaced with the drive roll 1
Similarly, the care assisting device A used instead of the above eliminates the failure due to the leakage of the lubricating oil.

Further, the tensioning means B1 and the tensioning means B2 which require the driving roll 1 or the driving roll 26 of the present invention.
As in the case of the care-assisting apparatus A, the conventional care-assisting apparatus eliminates the failure due to the leakage of the lubricating oil.

[Brief description of drawings]

FIG. 1 shows a schematic view of a tensioning means using a driving roll of the present invention.

FIG. 2 shows a relationship between a blade, a rope, and a pressure roll of a drive roll of the present invention.

FIG. 3 shows a state in which a rope is clamped between a blade of a drive roll of the present invention and a pressure roll.

FIG. 4 (a) shows a relationship between a blade provided in a radial direction and a rope. (B) represents the situation when the radial blades are rotating.

FIG. 5 (a) shows an embodiment of a drive roll of the present invention. (B) Shows the relationship between the drive roll and the rope of the present invention.

FIG. 6 is a partial cross-sectional front view of a care assisting device using the drive roll of the present invention.

FIG. 7A shows the relationship between the drive roll and the rope when the rope is being lowered. (B) shows the relationship between the drive roll and the rope when the rope is hoisting an object.

FIG. 8 shows a partial cross-sectional front view of a conventional care assisting device.

[Explanation of symbols]

A ‥‥‥‥‥‥‥ Care assistance device B1 ‥‥‥‥‥ Tension means B2 ‥‥‥‥‥ Tension means C1 ‥‥‥‥‥ tension means C2 ‥‥‥‥‥ Tension means D1 ‥‥‥‥‥ Tension means D2 ‥‥‥‥‥‥ Tensioning means 1 ………………………… Drive roll 2 ‥‥‥‥‥‥‥ Press roll 3 ‥‥‥‥‥‥‥‥ rope 4 ‥‥‥‥‥‥‥ Rope 5: Guide roll 6 ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 7 ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 8 ‥‥‥‥‥‥‥ Reducer motor 9 ‥‥‥‥‥‥‥ 10 ‥‥‥‥‥ Tow nut 11 ... Motor with reduction gear 12 ... Spring 13: Shaft 14: Shaft bearing 15 …………………… Axis 16: Bearing 17 ... Rotating body 18 ‥‥‥‥‥ Output shaft 19: Blade 19a, 19b, 19c, 19d ... Blade 20 ... bolts 21 ‥‥‥‥‥ 22 ‥‥‥‥‥ Cavity 23 …………………… Projection 24 ... upper slope 25 .................................. Lower slope 26 ... drive roll 27 ‥‥‥‥‥‥ Blade 28 ‥‥‥‥‥ Kakuryo 29 ‥‥‥‥‥‥ Blade 30 ‥‥‥‥‥‥ 31 ‥‥‥‥‥‥ Center of rotation 32 ... drive roll 33 ‥‥‥‥‥ Peripheral surface 34 ‥‥‥‥‥ Peripheral surface

Claims (2)

[Claims] 1. A means for pinching a rope between a pressing roll and a driving roll, and tensioning the rope on the side opposite to the feeding side by feeding the rope by rotation of the driving roll, wherein the roll main body is substantially triangular or approximately six. Any one of the polygons, the blade edge of the plate-shaped blade is protruding tangentially to the output shaft from the surface of the outer periphery of the roll body, and the blade edge and the pressing roll of the rope. A drive roll, wherein the upper part of the cutting edge does not contact the upper slope of the recess when the lower slope of the recess is pressed. 2. A means for pinching a rope between a pressing roll and a driving roll, and for tensioning the rope on the side opposite to the feeding side by feeding the rope by the rotation of the driving roll, the arc-shaped outer peripheral surface and the corner ridge. And the height of the protrusions from the outer peripheral surface abutting above the lower slope of the concave portion of the rope immediately before being pinched. Drive roll characterized by being