JPH036800Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a rope winding machine for pulling out and winding up sheets attached to windows of poultry houses, livestock houses, etc., or curtains attached to skylights, etc.

Conventionally, in the above-mentioned rope winding machine used for drawing out and winding up sheets or curtains, etc., as shown in FIG. 2 is rotatably supported, a first drum 3 is fixed inside the case 1 of the rotating shaft 2, and a second drum 4 is fixed to the extension part, so that the driving means, that is, the rotating shaft 2 is rotatably supported. A double winch that rotates the first drum 3 and the second drum 4 by a bevel gear 5 attached to the other end, a pinion 6 meshing with the bevel gear 5, and a handle 7 operating the pinion 6. are using. Then, the other end of the rope 8 with one end attached to the first drum 3 is attached to the tip of a sheet or curtain (hereinafter referred to as curtain) 9, and the other end of the rope 10 with one end attached to the second drum 4 is attached. The other end is connected to the winding shaft 11 of the curtain 9.
The third drum 12 is fitted onto one end of the third drum 12.
The drum 12 is mounted crosswise to the second drum 4 so that it rotates in the opposite direction, and the curtain 9 is pulled out and rolled up by rotating the handle 7 in the forward or reverse direction. .

Therefore, with the above configuration, the winding diameter of the curtain 9 gradually increases from the start to the end of the winding, so that the winding speed becomes faster.
When the curtain 9 is pulled out, the winding diameter of the curtain 9 gradually decreases, so the winding speed of the curtain 9 and the rotation speed of the winding shaft 11 change, such as the rotational speed of the winding shaft 11 becoming faster. do.

However, since the two drums 3 and 4 of the conventional double winch always have a constant effective diameter and rotate at a constant speed, the winding speed of the two ropes 8 and 10 and the curtain 9 Since the winding speed and the rotational speed of the winding shaft 11 are different, the ropes 8, 10 and the curtain 9 may become slack or overtensioned.

In other words, in order to always apply a constant tension to the ropes 8, 10 and the curtain 9, this type of rope winding machine pulls out the curtain 9 to the maximum extent, and when the winding diameter is at its minimum, the winding shaft 11 is pulled out. The diameter of each drum is set so that the speed at which the curtain 9 is wound is equal to or higher than the speed at which the rope 8 unravels from the first drum 3. Therefore, when the curtain 9 is wound up in this state, the winding diameter of the curtain 9 gradually becomes larger, and since the rotation of the winding shaft 11 is constant, the curtain 9 is rolled up. Winding speed becomes faster. However, since the speed of the rope 8 being unwound from the first drum 3 is constant, the rope 8 and the curtain 9 will be pulled by the winding shaft 11. Therefore, it becomes difficult to operate the handle 7 when winding up the curtain 9, and there is a risk that the curtain 9, ropes 8, 10, etc. may be damaged due to excessive tension.

Also, when pulling out the curtain 9, the rope 10 is faster than the pulling speed of the curtain 9 by the rope 8.
Because the rotational speed of the winding shaft 11 is high, the rope 8 and the curtain 9 become slack, causing the rope 8 to be wound around the first drum 3 and the curtain 9 to be wound unevenly when being re-wound. There were flaws.

Furthermore, in the conventional rope winding machine, adjustment for elongation of the ropes 8, 10, etc. over time must be made at each rope attachment portion each time, which is troublesome.

Therefore, the present invention was made in view of the above-mentioned conventional problems, and it has the following features:
A rope winding machine that can absorb errors in curtain drawer and winding speeds, automatically correct for elongation of ropes over time, and always maintain a constant tension on ropes and curtains. The purpose is to provide the following.

For this purpose, in the present invention, the rope winding machine is provided in such a way that the first drum of a double winch type rope winding machine is rotatably fitted around the rotating shaft, and one side of the first drum of the rotating shaft is rotatably fitted. The first drum is locked with respect to the rotating shaft when the first drum rotates in the direction of untying the rope with one end attached to the first drum, and becomes free when the first drum rotates in the direction of winding the rope. 1
a second roller clutch acting in a direction opposite to that of the first roller clutch is fitted on the other side of the first drum of the rotating shaft; A second clutch is fixed to the case, and the first clutch is engaged with the first drum so as to rotate at the same time as the first drum, and the second clutch is connected to the second drum as an extension of the rotating shaft. A plurality of disc springs are loosely fitted to the outside of the second drum through a washer, and a presser nut that presses the disc springs from the outside is screwed into the second drum. The desired purpose is achieved by having a structure in which a disc spring and a washer are pressed and clamped.

The present invention will be described below with reference to illustrative embodiments.

A is a double winch type rope winding machine used for drawing out and winding up the curtain b, which includes a case 21, a rotating shaft 22 rotatably supported by the case 21, and a rotary shaft 22 inside the case 21. a first drum 23 that is located and rotatably loosely fitted to the rotating shaft 22;
, a second drum 24 located outside the case 21 and rotatably loosely fitted to the rotating shaft 22, and first and second roller clutches 25, 26 fitted to bearings on both sides of the case. and the second drum 2
4, a disc spring 28, a retaining nut 29, and a driving means 30 for rotating the first drum 23.

The case 21 is formed in a substantially U-shape and is attached to a pillar (not shown) of a structure or the like with bolts 31 or the like with the open end facing toward you. Near the open end of the opposite side walls of the case 21,
Shaft holes 21a, 2 that rotatably support the rotating shaft 22
1b is drilled.

The rotating shaft 22 is inserted into the shaft holes 21a, 2 of the case 21.
1b via sliding bearings 32a, 32b, and one side of the rotating shaft 22 is connected to the case 21.
a second drum 24 extending outwardly from the drum 24;
is rotatably fitted loosely. The rotating shaft 22 has the sliding bearings 32a and 32b.
Retaining rings 33a and 33b that come into contact with the outer surfaces of the case 21 are fitted to prevent the case 21 from coming off. Further, an external thread 22b is formed on the extension of the rotating shaft 22, and a step part 22a for locking a washer 27, which will be described later, and a male thread 22b are screwed into each other, and a presser nut 29 is screwed into the extension part.
A bar insertion hole 22c for inserting a bar (not shown) for preventing co-rotation with the holding nut 29 is bored at the other end of the rotating shaft 22.

The first drum 23 is located within the case 21 and is rotatably fitted around the rotating shaft 22 with play.
Large diameter drum flanges 34a and 34b are integrally formed at both ends of the first drum 23. Furthermore, an engaging pawl 23a is formed at one end of the first drum 23 to engage a first roller clutch 25, which will be described later. 23b is a rope through hole bored in the first drum 23, and 35 is a rope set screw screwed into the through hole 23b.

The second drum 24 is rotatably fitted loosely into the extension of the rotation shaft 22 via a washer 27 that engages with a step 22a formed on the extension of the rotation shaft 22,
A plurality of disc springs 28 are loosely fitted on the outside, and a presser nut 29 for pressing the disc springs 28 is screwed onto the outside. Therefore, the second drum 24 is held in pressure contact with the washer 27 and the disk spring 28, and rotates together with the rotating shaft 22 due to the pressure contact force. This pressing force is adjusted by adjusting the pressing force of the disc spring 28 depending on the tightening force of the holding nut 29.

The first roller clutch 25 includes a roller 36 and a roller bearing 37, and is provided on one side of the first drum 23 of the rotating shaft 22 with a first roller clutch 25 disposed on one side of the first drum 23 of the rotating shaft 22.
The drum 23 is locked when it rotates in the direction of untying the rope 38 attached at one end to the first drum 23 (in the embodiment, clockwise when viewed from the drive means 30 side), and the first drum 23 is locked. They are fitted so that they become free when rotated counterclockwise. Further, an engagement groove 37a is formed in the roller receiver 37 of the first roller clutch 25.
The engagement claw 23a of the first drum 23 is engaged with the engagement claw 23a of the first drum 23. Therefore, the first roller clutch 25 is assembled to rotate at the same time as the first drum 23.

The second roller clutch 26 consists of a roller 39 and a roller receiver 40, and acts in the opposite direction to the first roller clutch 25, i.e., becomes free when the first drum 23 rotates clockwise. , the rotating shaft 2 is rotated so that the first drum 23 is in a locked state when it rotates counterclockwise.
The roller receiver 40 is fitted onto the other side of the first drum 23 of No. 2, and the roller receiver 40 is fixed to the case 21 with bolts 41.

Note that the second roller clutch 26 is omitted and only the first roller clutch 25 is used to operate the first drum 2.
3 may be held on one side, but in this case, the clearance between the first drum 23 and the rotating shaft 22 causes the first roller clutch to be 25, and it is also difficult to select the clearance between the first drum 23 and the rotating shaft 22.

Therefore, as in the present invention, the first drum 23
It is preferable to provide roller clutches 25, 26 on opposite sides of the roller clutch 25, 26 acting in opposite directions. Also, the first drum 23 is connected to roller clutches 25 and 26 from both sides.
By holding the roller clutch 25,
No radial load is applied directly to 26.

The driving means 30 includes an internal gear 43 attached to the outer drum flange 34b of the first drum 23 by a rivet 42, a pinion 44 meshing with the internal gear 43, and a shaft 45 of the pinion 44 that can be detachably attached to the pinion 44. It consists of a handle 46 to which it is attached. The shaft 45 is rotatably fitted into a slide bearing 48 which is rotatably fitted into a bearing bush 47 fixed to the case 21.
It is held by a retaining ring 50 that is fitted into the slide bearing 48 and contacts the sliding bearing 48 via a washer 49. Further, the slide bearing 48 is held by a set screw 51 screwed into the bearing bush 47. The reason why the internal gear 43 is used as the gear attached to the first drum 23 is to make the direction of rotation of the handle 46 and the direction of rotation of the first drum 23 the same, thereby improving operability.

One end of the rope 38 is attached to the first drum 23, and the other end of the rope 38 is attached to a support rod 52 attached to the tip of the curtain b, and its middle portion is fixed to the upper frame (not shown) of the structure, etc. It is hung on a guide roller 53 that is Further, one end of the rope 54 is attached to the second drum 24 so as to be wound in the opposite direction to the rope 38, and the other end of the rope 54 is rotatably attached to the lower stile (not shown) of the structure via a bracket 55. The third drum 57 is attached to one end of the take-up shaft 56 of the curtain b, which is rolled up, so as to cross over the third drum 57. Therefore, the third drum 57 rotates in the opposite direction to the second drum 24.

The drum diameters of the drums 23, 24, and 57 are determined in order to correct the difference in the operating speed of the rope 38 and the curtain b, and to always apply a constant tension to the rope 38 and the curtain b. When the curtain b is pulled out to the maximum extent and the winding effective diameter of the winding shaft 56 becomes the smallest, the winding speed of the curtain b wound around the winding shaft 56 and the winding speed of the rope 38 unraveled from the first drum 23 are determined. It is set to be as fast or faster. This can be expressed as a formula as follows.

D ₁ ≦D ₄ min×D ₂ /D ₃ D ₁ ; Effective diameter of the first drum 23 D ₂ ; Effective diameter of the second drum 24 D ₃ ; Effective diameter of the third drum 57 D ₄ ; Curtain b The effective diameter of the winding shaft 56 when it is pulled out to the maximum extent and reduced to the smallest.And in order to fully operate the speed correction function and brake function of pulling out (unwinding) the rope 38 and curtain b, , D ₁ <D ₄ min×D ₂ /D ₃ . This is because the greater the difference in speed between the rope 38 and the curtain b, the greater the braking effect.

Next, a description will be given of the operating state of the rope winder a constructed as described above when the rope winder a is used to pull out the curtain b.

First, rotate the handle 46 counterclockwise,
The first drum 23 is rotated counterclockwise to wind up the rope 38. At this time, the first roller clutch 25 rotates counterclockwise together with the first drum 23, but since it is free with respect to the rotating shaft 22, the rotating shaft 22 does not rotate. Further, even if the rotating shaft 22 attempts to rotate, when the rotating shaft 22 rotates counterclockwise, the second roller clutch 26 fixed to the case 21 is in a locked state with respect to the rotating shaft 22. Therefore, rotation of the rotating shaft 22 is reliably prevented. Therefore, the rotating shaft 22
There is no rotation of the second drum 24 due to this.

As the rope 38 is wound around the first drum 23 as described above, the curtain b is drawn out. As the curtain b is drawn out, a clockwise rotational force is applied to the winding shaft 59 and the third drum 57, and this rotational force is applied to the second drum 24 via the rope 54 as a clockwise rotational force. It is conveyed as follows. When the rotational force becomes larger than the pressing force of the disc spring 28, the second drum 24 rotates counterclockwise against the pressing force, and the third drum 57 rotates clockwise.

Therefore, the curtain b is pulled out together with the ropes 38 and 54 under constant tension due to the pressing force of the disc spring 28.

Next, the operating state of the rope winder a during the winding operation of the curtain b will be explained.

First, the handle 46 is rotated clockwise, the first drum 23 is rotated clockwise, and the rope 38 is rotated clockwise.
I will solve it. At this time, the first roller clutch 25 is in a locked state with respect to the rotating shaft 22,
Further, since the second roller clutch 26 is in a free state, the rotating shaft 22 is rotated clockwise together with the first drum 23 by the first roller clutch 25 which rotates at the same time as the first drum 23. By the rotation of the rotating shaft 22, the second drum 24, which is held in pressure contact with the extension of the rotating shaft 22 by the washer 27 and the disc spring 28, is rotated by the pressing force of the disc spring 28. It also rotates clockwise.

As the second drum 24 rotates clockwise, the third drum 57 is rotated through the rope 54.
rotates counterclockwise, the winding shaft 56 also rotates counterclockwise, and the curtain b is wound up on the winding shaft 56.

During the winding operation, the speed of the rope 38 unraveled from the first drum 23 is constant, but as the curtain b is wound up, its effective diameter gradually increases, so the winding speed increases. I'll come. Therefore, the rope 38 is gradually pulled more strongly by the curtain b. This tensile force causes the disk spring 28
When the pressing force becomes larger than the pressing force of the disc spring 28 and the second
Rubbing occurs between the drum 24 and the drum 24. Therefore, the curtain b is always wound up together with the ropes 38 and 54 under a constant tension.

As described above, according to the present invention, the first drum and the second drum are rotatably fitted around the rotating shaft, and the roller clutch is interposed between the first drum and the rotating shaft. When pulling out the curtain, the rotating shaft is not rotated, and the second drum is held between a washer and a disc spring, and the second drum is slid and rotated by the pressing force, and a constant tension is always applied to draw out or wind the curtain. This not only makes it possible to eliminate random winding of the curtain or rope and prevent damage due to over tension, but also automatically adjusts the elongation of the rope over time.

Further, according to the present invention, the winding directions of the ropes of the first drum and the second drum are opposite, and moreover, the second drum is pressed and clamped by the pressing force of the disc spring. Therefore, a brake mechanism is not required.

Furthermore, according to the present invention, even if the curtain is blown up by a gust of wind and excessive tension is applied to the curtain or rope when the curtain is being drawn out, the tension is absorbed by the friction between the disc spring and the second drum. Since it can be absorbed by water, it has the effect of preventing damage and improving safety.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a curtain equipped with a conventional rope winder, Figure 2 is a perspective view of a curtain equipped with a rope winder according to the present invention, and Figure 3 is an enlarged view of the rope winder according to the present invention. 4 is an enlarged sectional view showing the relationship between the first drum, the first roller clutch, and the rotating shaft, and FIG. 5 is an enlarged perspective view of the same. a is a rope winder, b is a curtain, 21 is a case, 22 is a rotating shaft, 23 is a first drum, 23a
24 is the second drum, 25 is the first roller clutch, 26 is the second roller clutch, 2
7 is a washer, 28 is a disc spring, 29 is a presser nut, 3
0 is a driving means, 38 and 54 are ropes, 37a is an engagement groove, 56 is a winding shaft, and 57 is a third drum.

Claims (1)

[Scope of utility model registration request] A first drum is rotatably supported on the case by a rotating shaft, one side of the rotating shaft is extended to the outside of the case, a second drum is attached to the extended portion, and the first drum One end of the rope is attached to the second drum, and the other end of the rope is attached to the tip of the sheet or curtain, and the other end of the rope is attached to one end of the winding shaft of the sheet or curtain. It is attached in a cross-hinged manner to the third drum attached to the
A double winch type rope winding machine that draws out and winds up a sheet or curtain by rotating the first drum and the second drum by a driving means, wherein the first drum
The drum is rotatably fitted loosely on the rotating shaft, and
One side of the first drum of the rotating shaft is locked when the first drum rotates relative to the rotating shaft in the direction of untying a rope, one end of which is attached to the first drum. A first roller clutch that becomes free when rotating in the winding direction is engaged;
Further, on the other side of the first drum, a second roller clutch is provided on the other side of the first drum.
a roller clutch is engaged, the second roller clutch is fixed to the case, and the first roller clutch is engaged with the first drum to rotate at the same time as the first drum. At the same time, the second drum is rotatably and loosely fitted to the extension of the rotating shaft via a washer, and a disc spring is loosely fitted to the outside of the second drum, and the disc spring is also fitted to the outside of the second drum. A rope winding machine for sheets, curtains, etc., characterized in that a presser nut for pressing the drum is screwed together, and the second drum is held in pressure contact with a disc spring and a washer.