JPH081236B2 - Rope winding transmission device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention provides a rope winding transmission device for converting the tension of a rope or the like into a rotational force, and in particular, provides resistance for an evacuation rope and slowly moves from a high place to the ground. The present invention relates to a suitable slow-moving device used for descending to the ground.

[Prior Art] Conventionally, in slow-moving devices, there are pulleys and winding drums as a method of transmitting the tension applied to the evacuation rope to the braking portion of the slow-moving device as a rotational force. The difference between the pulley and the winding drum is that in the case of the pulley, the rope makes contact within less than one rotation of the pulley, but in the case of the winding drum, the rope makes contact at one rotation or more. When the tension of the rope is transmitted to the pulley and the winding drum, the magnitude of the transmission force depends on the friction coefficient between the rope and the pulley and the winding drum, the contact length, and the reverse tension applied to the opposite side of the rope tension. In the case of size and pulley, it is strongly affected by the angle of the V-shaped groove that holds the rope. In order to increase the transmission force, in the case of a pulley, the diameter of the pulley may be increased to increase the contact length, but the outer diameter of the device becomes large and the weight becomes heavy. In addition, the number of rotations of the output shaft that supports the pulley is reduced, and the braking efficiency of the brake unit is reduced. There is an optimal grip angle for the rope, and if it is less than that, the rope will bite into the V-shaped groove of the pulley and the rope will not come off the pulley, or the rope will be damaged. The method of applying reverse tension complicates the structure of the device.

There are two ways to wind a winding drum, one of which is, as is well known, a method of winding the rope several times in the axial and radial directions of the winding drum and winding most of the rope into the winding drum. Is. In this method, when the entire long rope is wound around the winding drum, the diameter and volume of the winding drum portion increase, and the shape of the device increases.
Also, when several layers of rope are wound around the winding drum, if the layers change, the position of the rope and the distance to the axis of the output shaft that supports the winding drum will change, and the couple will change. As it moves out of the barrel, the couple applied to the winding drum decreases, and the descent speed decreases. Further, the rope in the upper layer wound around the winding drum bites between the rows of ropes in the lower layer due to the tension, and the rope may not come off the biting portion during use, and the rotation of the winding drum may stop. Moreover, since one end of the rope is fixed to the winding drum, the slow-down device cannot be used in a fishing bottle type. On the other hand,
Until the rope is cut, the winding cylinder and the rope do not run idle, so the force transmission is reliable. Alternatively,
There is a method of winding the winding drum in the axial direction of the winding drum in a more orderly and orderly manner several times or more. In this method, the rope can be moved in a fishing bottle type without tying one end of the rope to the winding drum, but the rope winding part of the winding drum moves in the axial direction every time the rope moves, so the movement distance of the rope is reduced. If the length is long, a long winding cylinder is required in the axial direction, and the device becomes large and heavy.

The present invention has been made in order to solve the above-mentioned problems, and by incorporating the advantages of the pulley and the winding drum, and by adopting an intermediate structure between them, it is small and reliable, and the rotational force of the rope tension is small. It is an object of the present invention to provide a rope winding transmission device that can be replaced with a rope.

[Means and Actions for Solving the Problems] A rope winding transmission device according to the present invention includes a winding cylinder 1 rotatably supported by a main body 4, and a winding cylinder 1 arranged adjacent to the winding cylinder 1. 4, which includes a counter shaft 5 supported by 4 and, once the rope 3 is brought into contact with the counter shaft 5, the winding drum 1 and the counter shaft 5 are openly belted in an orderly manner over several rows, and finally the counter shaft 5 is attached to the counter shaft 5. When the rope 3 is contacted again, the winding direction of the rope 3 around the counter shaft 5 at the first and last contact with the counter shaft 5, and the counter shaft 5 of the rope 3 by the intermediate open belt hanging except the first and last contact. The tension generated in the rope 3 is transmitted to the winding drum 1 as the rotational force of the winding drum 1, and the collar 6 is arranged on the counter shaft 5 at a predetermined interval, and the collar 6 is wound. Open the belt between the body 1 and counter shaft 5 It is positioned between the ropes 3 arranged in order in several rows to prevent the ropes 3 wound around the auxiliary shaft 5 from being overlapped with each other, and the collar 6 of the auxiliary shaft 5 is in contact with the rope 3. It is characterized in that a rotatable ring 7 is separately provided on the outer circumference of the sub shaft 5 divided by, and the contact between the sub shaft 5 and the rope 3 is a rolling contact.

In this way, the rope 3 is brought into contact with the auxiliary shaft 5 and then wound around the winding drum 1, and the rotatable ring 7 is provided in the portion of the auxiliary shaft 5 that comes into contact with the rope, so that the rope 3 is securely attached. The device can be wound around and the device can be downsized.

[Embodiment] The structure of the device of the embodiment will be described below with reference to the drawings. The rope 3 comes into contact with the winding drum 1 from the outside of the apparatus, and separates from the winding drum 1 and makes contact with the counter shaft 5 before making one revolution. Before making one revolution on the counter shaft 5, it separates from the counter shaft 5 and contacts the winding cylinder 1. After coming into contact with the winding cylinder 1, the rope 3 comes into contact with the auxiliary shaft 5 again before making one revolution. In this way, the winding cylinder 1 and the counter shaft 5 are alternately reciprocated, and when viewed from the side, they are hung like an open belt (in this way, except for the first and last contact, it is hung around with an oven belt). (Opening (pseudo) modoki)), it is wound several times in an orderly manner so that the ropes do not overlap each other, and finally the rope 3 appears in the direction opposite to the direction in which it entered the device, that is, away from the device. Go on. The winding drum 1 is pivotally supported and connected by an output shaft 2. The output shaft 2 connects the winding drum 1 and the brake portion, and is rotatably supported by the main body 4 at both ends of the winding drum 1. Both ends of the sub shaft 5 are rotatably supported by the main body 4. This device has the above structure, and if one end of the rope 3 is pulled, the rope 3
Reciprocates while sliding between the winding cylinder 1 and the counter shaft 5, and comes out of the winding cylinder 1 while rotating the winding cylinder 1 and the counter shaft 5. The rope 3 at the other end gradually approaches the winding drum 1 as the winding drum 1 rotates. By alternately pulling both ends of the rope 3, the rope 3 reciprocates like a fishing bottle. The feature of this structure is that by increasing the number of times the rope 3 is hung between the counter shaft 5 and the winding drum 1,
Since the contact length can be increased to any extent, the transmission force can be adjusted arbitrarily. Since the length of the winding drum 1 may be increased in order to increase the contact length, the diameter of the winding drum 1 can be made significantly smaller than the diameter of the pulley. As for the length of the winding drum, the rope 3 has the winding drum 1 and the counter shaft 5.
Since it moves in the axial direction of the winding drum every time it reciprocates between the ropes, the length of the winding drum 1 in the axial direction is the product of the rope diameter and the number of ropes 3 multiplied by each other regardless of the length of the rope 3. Therefore, the length of the winding drum can be significantly shortened as compared with the direction in which the winding drum 1 is wound in a single layer in the axial direction in an orderly manner. Moreover, the torque is constant regardless of the length of the rope used, and the rope 3 can be used in a fishing bottle type. Winding drum 1
It will be theoretically explained below that a large transmission force can be obtained by increasing the contact length between the rope 3 and the rope 3.

In FIG. 5, a minute portion PQ between a point P at a length s measured along the column surface from the point A and a point Q at s + Δs is taken out from FIG. The frictional force acting along the surface is R. Now, considering the case where it is about to start sliding from P to Q, the tangential balance equation is −T (s + Δs) cos (Δθ / 2) + T (s) cos (Δθ / 2) + μ ₀ N = 0 The equilibrium equation in the normal direction is −T (s + Δs) sin (Δθ / 2) −T (s) sin (Δθ / 2) + N = 0. If Δθ is sufficiently small, N = T (s) Δθ is obtained from the second equation, so by substituting this into the first equation and rearranging, T ′ (s) Δs = μ ₀ T (s) Δθ Then, when T is considered as a function of the angle formed by the tangent line at P at A, dT / ds · ds / dθ = dT / dθ, and thus dT / dθ = μ ₀ T is obtained. This solution is T = T ₁ e ^μ0θ (Mechanics: Tadao Miki, Asakura Shoten, _1st edition of 1937, see P35). However, T ₁ is the tension when θ = 0, that is, at the point A. For example, assuming that the friction coefficient between aluminum and nylon ropes is μ ₀ = 0.7, T ₂ / T ₁ = e ^{0.7 × 2π} ≈ 81 when one turn is wound, that is, 1/1 of the force at the other end of the rope. The power of 81 can support this.
According to the above theoretical formula, the larger the θ is, that is, the longer the contact length between the rope and the winding drum, that is, the greater the number of times the rope 3 reciprocates between the winding drum and the auxiliary shaft 5, the larger the transmission force becomes.

Next, as in the present embodiment, the gap between the winding cylinder 1 and the sub shaft 5 is brought close to the rope diameter, and after the rope 3 comes into contact with the sub shaft 5 from the outside, the sub shaft is subtended at right angles to the tension direction. Bending along the shaft 5, immediately contacting the winding drum 1 and rotating along the winding drum 1, the contact length between the winding drum 1 and the rope 3 is greater than when contacting the winding drum 1 without contacting the auxiliary shaft 5. Can be increased. Similarly, when the rope 3 goes out of the winding cylinder 1, the rope 3 bends at a right angle along the counter shaft 5 from the winding cylinder 1, comes in contact with the counter shaft 5, and then goes out to make the rope 3 and the winding cylinder 1 separate. The contact length of can be increased. By increasing the contact length, the transmission force can be increased as described above.

Next, the collar 6 is provided between the ropes of the counter shaft 5 in this embodiment.
The advantages of installing the are described below. Several ropes 3 are laid in parallel between the winding cylinder 1 and the counter shaft 5 in an open-belt fashion, and move in the same direction at high speed.
While the rope 3 is being used, fluff is generated around the rope 3, and the rope 3 is caught by the rope 3 next to it or sandwiched between them, and the ropes 3 overlap with each other and the winding drum 1 does not move. There are cases. This kind of situation is very dangerous. Therefore, by installing the collar 6 between the ropes of the counter shaft 5, adjacent ropes 3 cannot overlap each other at the counter shaft 5, which is very effective in preventing accidents.

Next, as in the present embodiment, when the ring 7 is installed on the portion of the counter shaft 5 that contacts the rope 3, the ring 7 is rotatable with respect to the counter shaft 5, so that the rope 3 is attached to the outside of the ring. Since the ring 7 rotates in the same direction and at the same speed, the tension before and after the contact of the rope 3 is the same,
Hard to damage the rope 3. Without the ring 7, the rope 3 comes into direct contact with the counter shaft 5, but the movement of the counter shaft 5 and the movement of the rope 3 are not always constant in direction and size, so the rope 3 is easily damaged. Damage to the rope 3 can cause serious accidents when using the slow down device.

Next, as in the present embodiment, the rope 3 in which the space between the winding cylinder 1 and the counter shaft 5 is pseudo-belt is wound around the winding cylinder 1 and the counter shaft 5.
To the outside of the rope 3 so that the
By attaching the rope 3, the contact angle of the rope 3 with the winding drum 1 is increased, so that the contact length is increased and the rotation transmission force can be increased. In addition, the winding cylinder 1 and the counter shaft 5
The rope 3 is about to start contacting the
It has an effect of preventing being caught between the winding drum 1 and the winding drum 1 and diving under the adjacent rope 3 to be overlapped with each other. Both ends of the presser bar 8 are rotatably supported by the main body 4. When the rotatable collar 9 pivotally supported by the presser bar 8 is installed on the outer periphery of the presser bar 8, the collar 9 moves in the same direction and at the same speed as the rope 3, so that the rope 3 comes into contact with the collar 9 smoothly. There are few scratches on the rope 3.

Next, the advantages of installing the sliding plate 10 in the gap between the winding drum 1 and the main body 4 in this embodiment will be described below. When the rope 3 is wound several times between the winding drum 1 and the counter shaft 5 by open belt quasi, the rope 3 causes a kind of screw action to generate a thrust force in the winding drum 1 in the axial direction. Therefore,
When the side surface of the winding drum 1 and the main body 4 are brought into direct contact with each other, the side surface of the winding drum 1 and the main body 4 may be damaged due to point contact due to unevenness of the contact surfaces of the winding drum 1 and the main body 4. Therefore, by installing the sliding plate 10 between them, it is possible to prevent the contact surfaces of the winding drum 1 and the main body 4 from being damaged.

INDUSTRIAL APPLICABILITY The present invention has the above-described structure, configuration, and effect, and when actually used, the evacuee hangs at one end of the rope 3 to generate a couple force in the winding drum 1 and the winding drum 1 rotates. On the side where the rope 3 enters the device, the ropes 3 enter the device one after another by the rotation of the winding cylinder 1, and reciprocate between the auxiliary shaft 5 and the winding cylinder 1 several times. After that, by leaving the winding cylinder 1 and repeating this operation continuously, people can be evacuated from a high place. After the first person descends, the other end of the rope 3 moves to a high place where the device is located, so that evacuees from the next time onward can evacuate to the ground in a fishing bottle manner. Further, the present device is not limited to a slow-moving device, but there are many fields in which it can be used for fishing reels, winches, machine tool transmission devices, and the like.

[Effects of the Invention] As described above, according to the present invention, since the device has an intermediate structure between the pulley and the winding drum, a small size and reliable operation can be obtained.

[Brief description of drawings]

FIG. 1 is a front view in vertical section of a rope winding transmission device of a slow-moving device according to the present invention, FIG. 2 is its plan view, and FIG.
Right side view, Fig. 4 is an oblique view, Fig. 5 is an explanatory view showing the effect of friction when a rope is wound around the winding drum and tension is applied, and Fig. 6 shows that the rope and winding drum are It is an enlarged view of a minute portion which is in contact. 1 ... Winding drum, 2 ... Output shaft, 3 ... Rope, 4 ... Main body, 5 ... Secondary shaft, 6 ... Collar, 7 ... Ring, 8 ... Holding rod, 9 ... Collar, 10 …… Slip plate.

Claims (4)

[Claims] 1. A winding cylinder 1 rotatably supported by a main body 4, and a counter shaft 5 arranged adjacent to the winding cylinder 1 and also supported by the main body 4, the rope 3 being a sub shaft. After contacting the shaft 5 once, the winding drum 1 and the sub shaft 5
With an open belt hanging in between, it is tidily wrapped over several rows,
Finally, by contacting the counter shaft 5 once more, the winding direction of the rope 3 around the counter shaft 5 at the first and last contact of the rope 3 with the intermediate open belt hanging except the first and last contact The rope 3 is wound around the counter shaft 5 in the opposite direction, and the tension generated in the rope 3 is transmitted to the reel 1 as the rotational force of the reel 1, and the flange 6 is arranged on the counter shaft 5 at predetermined intervals. , The collar 6 is positioned between the winding drum 1 and the counter shaft 5 between the ropes 3 which are arranged in an orderly manner by an open belt so that the ropes 3 wound around the counter shaft 5 overlap each other. In addition, a rotatable ring 7 is separately provided on the outer periphery of the auxiliary shaft 5 divided by the collar 6 at the portion of the auxiliary shaft 5 that comes into contact with the rope 3, and the contact between the auxiliary shaft 5 and the rope 3 is rolled. Characterized by contact Rope winding conducting device to. 2. The device according to claim 1, wherein the gap between the ring 7 provided on the outer circumference of the counter shaft 5 and the winding cylinder 1 is brought close to the diameter of the rope 3, and the rope 3 is first moved to the counter shaft 5.
When it comes into contact with the rope 3, the rope 3 bends along the counter shaft 5 at a substantially right angle, immediately contacts the winding cylinder 1, and finally when it comes into contact with the counter shaft 5, the rope 3 makes a substantially right angle along the counter shaft 5. A rope winding transmission device characterized by bending into 3. The device according to claim 1 or 2, wherein the rope 3 wound between the winding cylinder 1 and the counter shaft 5 by an open belt is wound around the winding cylinder 1 and the counter shaft 5 from the outside. A rope winding transmission device, characterized in that a pressing rod 8 for pressing is provided. 4. A rope winding transmission according to any one of claims 1 to 3, characterized in that a sliding plate (10) is installed between the winding drum (1) and the main body (4). apparatus.