JPS6353118B2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a winch device.

<Prior art and its problems> Conventionally, in a winch device for hoisting or unloading heavy objects, a winch device developed by Tokuko Showa is capable of winding a rope at almost constant speed from the start of winding to the end of winding. There is one described in Publication No. 54-30574.

The winch device described in this publication does not use one winding drum to wind and pull the rope, but instead uses two rotationally driven drums, wraps the rope around these drums several times and pulls the rope, and then pulls the rope around the drum. It is stored in a winding drum.

Therefore, since the parts that pull the rope are two rotatably driven drums whose outer diameter does not change sequentially during winding, the rope can be pulled at approximately constant speed.

However, in the winch device described in the publication, the mode in which the rope is wound around two rotating drums is
Since the rope is wound around the two drums in an oval shape, the contact surface of the rope with the drum during one winding, that is, the friction surface is small. Therefore, when an impact force is applied to the article being lifted, the rope may slip against the outer peripheral surface of the drum.

Therefore, in order to increase the friction surface of the rope against the drum, as described in Japanese Utility Model Publication No. 16708/1973, the rope was
It is conceivable to wrap it in a letter shape.

However, in this type of winch device, it becomes necessary to use ropes of different lengths depending on the height at which the heavy object is to be hoisted, and the ropes may have to be replaced. At that time, in conventional winch devices, including those described in the publication, both ends of the rotating shaft of the two rotatably driven drums are supported by bearing members, so as mentioned above, the two drums are When winding or unwinding a rope in an oval shape, it is necessary to wind or unwind the rope from the end of each drum one by one, making the work of installing and unwinding the rope time-consuming. Ta.

This invention solves the above problem, and in a winch device that can pull a rope at approximately constant speed, the rope can be easily attached and detached.
Another object of the present invention is to provide a winch device in which rope slippage is less likely to occur after the rope is attached.

<Means for Solving the Problems> The winch device according to the present invention has an output shaft whose tip protrudes from the side of the machine frame, and a winch whose tips protrude from the side of the machine frame parallel to the output shaft and which are linked to the output shaft. a winding drum connected to the tip of the output shaft and having a small diameter portion and large diameter portions on both sides of the small diameter portion; and a winding drum connected to the tip of the one rotating shaft and having a small diameter portion and a small diameter portion. an idler having a large diameter portion at both ends and having the large diameter portion located on a tangential extension line of the small diameter portion of the winding drum; a lever that is rotatable on a rotating surface of the lever and whose tip side is biased in a direction approaching the other rotating shaft; and a lever whose axes are parallel to each other, one of which is connected to the tip of the other rotating shaft , two winding rollers rotatably pivoted to the tip of the lever so that the other is close to one side, and the mutually close portions are arranged on the tangential extension line of the small diameter portion of the idler; , it is wound several times from the large diameter part to the small diameter part of the winding drum, then wrapped several times from the large diameter part to the small diameter part of the idler, and is further sandwiched and pulled by two winding rollers. This solves the above-mentioned problem.

<Operations and Effects of the Invention> In the winch device according to the present invention, the rope is attached to the winding drum/idler which is arranged protruding from the side of the machine frame, and between the two winding and feeding rollers, The rotary shaft (or rotating shaft) only protrudes from the side of the machine frame, and the tip side is not supported by a bearing member or the like. In addition, the other side of the two winding and feeding rollers that sandwich the rope is attached to the tip of a rotatable lever that is urged to approach the roller on one side, and when the lever is rotated, the winding is The gap between the rollers can be easily widened.

Therefore, when attaching a rope to a winch device, hold the middle part of the rope from the open side of the machine frame and connect it to the take-up drum, idler, and between the take-up rollers, which have been widened by operating the lever. It is possible to install the winding rollers by narrowing the distance between the winding and feeding rollers.

In addition, when removing the rope from the winch device, operate the lever on the open side of the machine frame to loosen the rope from between the winding and feeding rollers that have widened the gap, and then remove the rope from the idler and winding drum in sequence. It can often be removed by holding the middle part of the rope.

After the rope is attached to the winch device, the rope is held between rotating winding rollers, so it is possible to keep tension on the rope wound around the idler and winding drum at all times. In particular, since the rope is wrapped several times around each idler or take-up drum, the friction surface of the rope against the idler or take-up drum is increased, which increases the risk of rope slipping. It can be prevented.

Therefore, with the winch device according to the present invention, work can be done not at the end of the rope but at the intermediate portion, making it easy to attach and detach the rope. Since the rope is wrapped several times around the rope, it is difficult for the rope to slip.

<Example> Hereinafter, the configuration of the apparatus of the present invention will be explained with reference to the example shown in FIGS. 1 to 8.

M shown in FIG. 1 is a drive source fixed at a predetermined position of the first machine frame F1, such as a motor or an engine.
is a first pulley fixed to its output shaft, and 2 is fixed to a first rotating shaft 15 which is pivotally fixed to the first machine frame F1 and the third machine frame F3 (fixed inside the first machine frame F1). A second pulley (see FIG. 3), 3, is a belt wound around the first pulley 1 and the second pulley 2. 6 is the first
The idler is rotatably fitted onto a rotating shaft 7 supported on the machine frame F1, and 6A is a small diameter portion formed on the idler 6 as shown in Fig. 2, and 6B is a large diameter portion formed on both sides of the small diameter portion 6A. It is. 8 is a winding drum fixed to the output shaft PS of the worm type reducer G, 8A is a small diameter portion formed almost in the center, and 8B is a small diameter portion 8A.
The large diameter portions are formed on both sides of the diaphragm, and both are tapered from the large diameter portions 6B, 8B to the small diameter portions 6A, 8A. R is a rope, such as a steel wire rope or a fibrous rope, and the rope R is a winding drum 8.
It is wound several times from the large diameter part 8B to the small diameter part 8A of the idler 6, and then it is wound several times from the large diameter part 6B to the small diameter part 6A of the idler 6, and then passed between winding rollers 95 and 97 (not shown), which will be described later. It is wound onto a rotatable reel. F2 shown in FIG. 1 is a second machine frame fixed to the side of the first machine frame F1, and 11 is the second machine frame F1.
A first guide roller 13 is rotatably fitted on a fixed shaft 10 fixed to the second machine frame F2, and a pair of second guide rollers 13 are rotatably fitted on a fixed shaft 12 fixed to the second machine frame F2.

The rotation shaft 7 described above is horizontally fixed to the machine frame F1, and its tip protrudes from the side surface of the machine frame F1, and the idler 6 is attached to the tip. Similarly, the output shaft PS described above is horizontally fixed to the machine frame F1, and its tip protrudes from the side surface of the machine frame F1, and is fixed to the winding drum 8 at its tip.

Next, in FIGS. 3 and 4, 16 is a third pulley fixed to the first rotating shaft 15, and 18 is a third pulley.
A second rotating shaft installed in the first bearing member 41 vertically installed on the machine frame F3 and the first machine frame F1,
A fourth pulley 19 having a larger diameter than the third pulley 16 is fixed to one end of the sprocket 8, and a first sprocket 81 is fixed to the other end as shown in FIG.
is fixed. A belt 20 is wound around the third pulley 16 and the fourth pulley 19. Reference numeral 25 shown in FIG. 4 is a first petal that rotates around a pin 26 fixed to the first machine frame F1 as a fulcrum. This first
One end of a connecting rod 27 is rotatably connected to the tip of the petal 25, and the other end of the connecting rod 27 is rotatable about a pin 30 fixed to the first machine frame F1. One end of the arm 29 is rotatably connected. In addition, a small hole 33 and a first
A tension spring 3 is inserted between the pin 34 fixed to the machine frame F1.
5 is hung, and normally urges the arm 29 to rotate counterclockwise. Reference numeral 31 denotes a pin fixed to the arm 29, into which is fitted a tension pulley 32 that rotates while contacting the belt 20. Therefore, when the first petal 25 is depressed, the arm 29 rotates clockwise and tension is applied to the belt 20, so the rotational force of the third pulley 16 is
This is transmitted to the pulley 19, and when the first petal 25 is released, the arm 29 rotates counterclockwise from the position shown in FIG. 4 due to the biasing force of the tension spring 35. 32
The rotational force of the third pulley 16 is not transmitted to the fourth pulley 19.

Next, in FIGS. 3 and 5, 42 is a fifth pulley fixed to the first rotating shaft 15, 43 is a second bearing member 61 and a third
A sixth pulley 44 having substantially the same diameter as the fifth pulley 42 is fixed to one end of the third rotating shaft 43 mounted on the machine frame F3. 45 is the fifth pulley 42 and the sixth pulley 44
It is a belt wrapped around. Reference numeral 40 shown in FIG. 5 is a second petal that rotates about a pin 51 fixed to a support column 50 integrally formed with the first bearing member 41 as a fulcrum. One end of a connecting rod 52 is rotatably connected to the tip of the second petal 40, and a pin 47 fixed to the second bearing member 61 is connected to the other end of the connecting rod 52. One end of an arm 46 that rotates as a fulcrum is rotatably connected. A tension pulley 48 that rotates while contacting the belt 45 is fitted into a pin 49 fixed to the other end of the arm 46. Further, a bracket 52A is protruded from the connecting rod 52, and this bracket 52A and the first machine frame F
A tension spring 53 is hooked between 1 and 1. This tension spring 53 normally biases the arm 46 to rotate clockwise. Therefore, when the second petal 40 is depressed, the arm 46 rotates counterclockwise and tension is applied to the belt 45, so the rotational force of the fifth pulley 42 is transmitted to the sixth pulley 44.
Conversely, when the second pedal 40 is released, the arm rotates clockwise from the position shown in FIG. 5 due to the urging force of the tension spring 53, so that the belt 45
The fifth pulley 42 does not come into contact with the tension pulley 48.
The rotational force of is not transmitted to the sixth pulley 44. Further, a second sprocket 82 is fixed to the other end of the third rotating shaft 43, as shown in FIG.

Next, in FIGS. 3 and 6, 62 is a seventh pulley fixed to the first rotating shaft 15, and 63 is a fifth rotating shaft connected on the same axis as the input shaft GS of the worm type reducer G. It is pivotally supported by the third machine frame F3. An eighth pulley 64 having a smaller diameter than the seventh pulley 62 is fixed to one end of the fifth rotating shaft 63, and the other end is fixed to the input shaft GS.
is connected to. A belt 65 is wound around the seventh pulley 62 and the eighth pulley 64. Reference numeral 60 shown in FIG. 6 is a third petal that rotates around a pin 71 fixed to the third machine frame F3 as a fulcrum. This third
One end of a connecting rod 72 is rotatably connected to the tip of the petal 60, and the other end of the connecting rod 72 is rotatable about a pin 67 fixed to the third machine frame F3. The arm 66 is rotatably connected to one end of the arm 66. A pin 69 fixed to the other end of the arm 66 has a tension pulley 68 that rotates while contacting the belt 65.
is fitted. Further, a bracket 72A is provided protruding from the connecting rod 72.
A tension spring 73 is hooked between 2A and the first machine frame F1. This tension spring 73 normally biases the arm 66 to rotate clockwise. Therefore, when the third petal 60 is depressed, the arm 66 rotates counterclockwise and tension is applied to the belt 65, so that the rotational force of the seventh pulley 62 is transferred to the eighth
This is transmitted to the pulley 64, and conversely, when the third petal 60 is released, the arm 66 rotates clockwise from the position shown in FIG. The rotational force of the seventh pulley 62 is not transmitted to the eighth pulley 64. In addition, 2 shown in Figure 4 above.
4, 39 shown in FIG. 5 and 59 shown in FIG. 6 are insertion openings for the first petal 25, second petal 40, and third petal 60, respectively.

Next, the first sprocket 81 fixed to the second rotating shaft 18, the second sprocket 82 fixed to the third rotating shaft 43, and the third sprocket fixed to the input shaft GS.
A chain 84 is wound around the sprocket 83 and the like as shown in FIG. Therefore, the rotational forces of the fourth pulley 19, sixth pulley 44, and eighth pulley 64 are transmitted to the winding drum 8 via the worm type reduction gear G through the chain 84.

Next, 91 shown in Fig. 2 is a worm type reducer G.
4th sprocket fixed to output shaft PS, 92
93 is the sixth sprocket fixed to the rotating shaft 96 as shown in FIG. 8; 94 is the fourth sprocket fixed to the rotating shaft 7 of the idler 6 as shown in FIGS. 1, 2, and 3. 91, 5th
This is a chain wrapped around sprocket 92 and sixth sprocket 93. The rotating shaft 96 is horizontally fixed to the machine frame F1, and its tip protrudes from the side surface of the machine frame F1. 95 is a winding roller with a built-in ratchet attached to the tip of the rotating shaft 96, and 95A is a spur gear portion integrally formed with the winding and feeding roller 95. 97 is a winding and feeding roller with a built-in ratchet, and 97A is a spur gear portion integrally formed with the winding and feeding roller 97. Further, this winding and feeding roller 97 is fixed to a rotating shaft 97B, and this rotating shaft 97B is inserted into a lever 99 that is supported by a fixed shaft 98 fixed to the first machine frame F1. The winding and feeding rollers 95 and 97 are driven by the chain 94 only when winding the rope R, and have built-in ratchets that freely rotate when rewinding. 99A is a coil spring fixed to a support FS protruding from the first machine frame F1, which constantly biases the lever 99 to rotate counterclockwise in FIG. Due to the force, the spur gear portion 97A of the winding and feeding roller 97 meshes with the spur gear portion 95A of the winding and feeding roller 95, thereby strongly clamping the rope R.

Next, the operation mode of this invention device having the above-mentioned configuration will be explained. In this invention device, the drive source M is constantly rotating. Therefore, the rotational force of the first pulley 1 is transferred to the second pulley 2 by the belt 3,
Because it is transmitted to the first rotating shaft 15, the first rotating shaft 1
5 fixed to the third pulley 16, the fifth pulley 42,
The seventh pulley 62 is constantly rotating. When the first pedal 25 is depressed in this state, the belt 20 is tensed, so that only the fourth pulley 19 rotates at bottom speed. Therefore, when the first sprocket 81 rotates in the direction of arrow A shown in FIG.
2 and 83 also rotate in the same direction, and the worm type reducer G rotates. Therefore, the winding drum 8 fixed to the output shaft PS of the worm reducer G rotates at a low speed to wind up the rope R at a low speed. At this time, when the first petal 25 is released and the third petal 60 is depressed at the same time as necessary, the belt 65 is tensed, and when the eighth pulley 64 rotates at high speed, the winding drum 8 also rotates at high speed and the rope R can be wound more quickly than at low speeds. Next, when the third petal 60 is released, the belt 65 is relaxed and the winding of the rope R is stopped.

Further, when the second petal 40 is depressed, the belt 45 is tensed and the sixth pulley 44 is rotated. When the sixth pulley 44 rotates clockwise, the second sprocket 82 also rotates in the direction of the arrow B shown in FIG. As a result, the first and third sprockets 81 and 83 rotate in the opposite direction to the rotation direction when winding the rope R, and the rope R is rewound. At this time, the winding and feeding roller 97, which is pivotally supported by the lever 99, is rotated clockwise in FIG. 1 to freely rotate the winding and feeding roller 95. When this second petal 40 is released, the belt 45 is relaxed, so the rope R
rewinding stops.

In the embodiment, a winding drum 8 and an idler 6 to which the rope R is attached protrude from the side surface of the machine frame F1, two winding rollers 95,
97, and these shafts (output shaft PS and rotating shafts 7, 96) only protrude from the side surface of the machine frame F1, and their tips are not supported by bearing members or the like. Also, of the two winding and feeding rollers that sandwich the rope R, the roller 97 is the roller 95.
A rotatable lever 99 biased toward the
By rotating a lever 99, the gap between the winding and feeding rollers 95 and 97 can be easily widened.

Therefore, when attaching the rope R to the winch device, hold the middle part of the rope on the open side of the machine frame and
The winding drum 8, idler 6,
Then operate the lever 99 to arrange the winding rollers 95 and 97 with a wider gap, and then move the roller 9
It can be installed by narrowing the space between 5 and 97.

In addition, when removing the rope R from the winch device, operate the lever 99 to loosen the rope R from between the winding and feeding rollers 95 and 97, which have widened the gap, and sequentially remove the rope from the idler 6, the winding drum 8, and then the second guide roller. 13. It can be removed from the first guide roller 11 by holding the intermediate portion of the rope R.

After the rope R is attached to the winch device, the rope R is rotated by the winding and feeding roller 9.
5 and 97, tension can be constantly applied to the rope R wound around the idler 6 and take-up drum 8. Since the rope is wrapped around the idler several times separately,
This increases the friction surface of the rope R against the winding drum 8 and prevents the rope R from slipping.

Therefore, the winch device of this embodiment provides the same effects as described in the section of the functions and effects of the invention described above.

[Brief explanation of drawings]

The figures show an embodiment of the device according to the present invention, in which Fig. 1 is a front view, Fig. 2 is a sectional view taken along the arrow line A-A' shown in Fig. 1, and Fig. 3 is a partial rear view (the arm mechanism is not shown). (Omitted), Figure 4 is a cross-sectional view taken along the arrow line B-B' shown in Figure 3, Figure 5 is a cross-sectional view taken along the line C-C' shown in Figure 3, and Figure 6 is a cross-sectional view taken along the arrow line C-C' shown in Figure 3. 7 is a cross-sectional view taken along the arrow line D-D′ shown in FIG.
A cross-sectional view along the line of arrow E', Figure 8 is F shown in Figure 1.
-F' is a partial cross-sectional view taken along the arrow line. 6... Idler, 6A... Small diameter part of idler, 6B
... Large diameter part of idler, 8... Winding drum, 8A... Small diameter part of winding drum, 8B... Large diameter part of winding drum,
R...rope, M...drive source.

Claims (1)

[Scope of Claims] 1. An output shaft whose tip protrudes from the side surface of the machine frame; and two rotating shafts that are parallel to the output shaft and whose tips protrude from the side surface of the machine frame and rotate in conjunction with the output shaft. a winding drum connected to the tip of the output shaft and including a small diameter portion and large diameter portions on both sides of the small diameter portion; and a winding drum connected to the tip of the one rotating shaft and comprising a small diameter portion and large diameter portions on both sides of the small diameter portion. and an idler whose large diameter portion is disposed on a tangential extension line of the small diameter portion of the winding drum; a lever that is rotatable on a rotational surface and whose tip side is biased in a direction approaching the other rotational shaft, the axes of which are parallel to each other, and one of which is connected to the tip of the other rotational shaft; two winding rollers, the other of which is rotatably pivoted to the tip of the lever so that the other is close to the one side, and whose mutually proximate portions are located on a tangential extension line of the small diameter portion of the idler; The rope is wound several times from the large diameter part to the small diameter part of the winding drum, then wrapped several times from the large diameter part to the small diameter part of the idler, and is then held between the two winding rollers and pulled. A winch device consisting of: