JP2005067758A - Hand winch device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hand winch device capable of being carried around easily and managing easily with different lifting heights. <P>SOLUTION: The hand winch device 1 is arranged so that the load W is fixed to one end of a rope R hung through a stationary pulley 3 and the winch device 1 is mounted on the other end of the rope R, and when the load W is to be lifted and put down, the rope R is set over between the first pulley 14 and the second pulley 15 so that it assumes S-form inside a casing 13 of the winch device 1. When a rotation handle 5 installed on the first rotary shaft 16 of the first pulley 14 is rotated in one direction continuously, the rope R moves in such a way as drawn in to the pulleys 14 and 15, and in association therewith the load gradually rises continuously. Even in case the operator puts off his hand(s) from the handle, the handle 5 is hindered from rotating oppositely by a check pawl 24 engaged with a ratchet wheel 23, and an occurrence of the load dropping during the lifting operation can be avoided even in case the operator puts off the hand(s) from the handle 5. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a manual winch device used for unloading at a high place.
[0002]
[Prior art]
Conventionally, as a technique in such a field, there is JP-A-11-43291. In the manual winch device described in this publication, unloading is performed by winding a wire around a drum while turning a handle, and the wire wound around the drum can be stopped at an arbitrary position by using a brake mechanism. At the same time, the load can be lowered at a predetermined speed.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 11-43291 [0004]
[Problems to be solved by the invention]
However, the conventional manual winch device described above has the following problems. That is, since the manual winch device used for raising and lowering the load is provided with a winding drum, it is difficult to carry it on site as the size of the device itself increases. Moreover, since the amount of wire wound is limited according to the diameter of the drum, the length of the wire that can be used for unloading is limited, and when the unloading height differs from site to site, it is difficult to respond to each site. There is.
[0005]
In particular, an object of the present invention is to provide a manual winch device that is easy to carry and can easily handle even when the unloading height is different.
[0006]
[Means for Solving the Problems]
A manual winch device according to the present invention includes a casing having a pair of side plates arranged in parallel to each other, a first pulley rotatably supported via a first rotation shaft arranged between the side plates, A second pulley that is rotatably supported via a second rotating shaft that is disposed between the side plates and that is disposed in series with respect to the first pulley, and a first pulley of the first pulley A rotary handle having one end attached to the rotary shaft, a ratchet wheel fixed to the first rotary shaft,
A check claw that engages with the ratchet wheel is provided.
[0007]
When lifting or lowering the load, the load is fixed to one of the ropes suspended via the fixed pulley, and the manual winch device is attached to the other of the ropes, and this rope becomes S-shaped in the casing of the manual winch device. Thus, it is bridged between the first pulley and the second pulley. When the rotary handle attached to the first rotary shaft of the first pulley continues to rotate in one direction, the rope continues to move so as to be pulled into each pulley, and the load gradually rises accordingly. to continue. In addition, even when the operator releases his hand from the rotary handle, the check pawl engaging the ratchet wheel prevents the rotary handle from rotating in the reverse direction, and the operator releases his hand from the rotary handle. However, the situation where the load falls during unloading is avoided. Furthermore, since the rope is merely bridged between the first pulley and the second pulley, it is possible to cope with each site having different unloading heights depending on the site. Furthermore, since this manual winch device does not require the use of a drum, the size of the device itself can be reduced, and it is excellent in portability and convenient to carry on site.
[0008]
In addition, it is preferable that the second rotation shaft positioned below is disposed so as to be shifted laterally with respect to the first rotation shaft positioned above. Such a configuration is optimal for loading and unloading loads in which a load in the vertical direction is applied to the rope in a state where the rope is bridged in an S shape between the first pulley and the second pulley.
[0009]
In addition, it is preferable to further include an auxiliary pulley disposed below the first pulley and an adjustment screw that advances and retreats toward a tapered guide groove provided annularly on the outer periphery of the auxiliary pulley. By adopting such a configuration, the rope can be passed between the tip of the adjustment screw and the guide groove of the auxiliary pulley, so that the rope can be firmly attached to the first pulley. The contact area and the frictional resistance of the rope with respect to the pulley are increased to reduce the slippage of the rope with respect to the pulley, thereby improving the work efficiency.
[0010]
Moreover, it is preferable that the inclined surfaces forming the V-shaped tapered guide grooves provided annularly on the outer circumferences of the first and second pulleys are provided with irregularities that appear alternately in the circumferential direction. As a result, the contact area and the frictional resistance of the rope with respect to the first and second pulleys can be increased, and the slipping of the rope with respect to the first and second pulleys can be reduced to improve the efficiency of the work.
[0011]
Moreover, it is preferable that friction powder for preventing slipping is attached to the inclined surface. As a result, the frictional resistance of the rope with respect to the first and second pulleys can be increased, and the slipping of the rope with respect to the first and second pulleys can be reduced to increase the efficiency of the work.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a manual winch device according to the present invention will be described in detail with reference to the drawings.
[0013]
A manual winch device 1 shown in FIG. 1 is used when delivering a load W from a worker on the ground to a worker on the top of the antenna tower 2, and a fixed pulley 3 is fixed on the top of the antenna tower 2. A single rope R is suspended from the pulley 3 so as to be hooked. A load W is bound to one end of the rope R, the other end of the rope R passes through the manual winch device 1 fixed near the ground of the antenna tower 2, and the surplus rope R is passed over the ground. The And it can be unloaded by continuing to rotate the rotating handle 5 of the manual winch device 1 in one direction, and can be unloaded by continuing to rotate the rotating handle 5 in the other direction.
[0014]
As shown in FIGS. 2 and 3, the manual winch device 1 has an upper hook portion 6 that hooks from above the upper horizontal frame F1 of the antenna tower 2 and a lower horizontal frame F2 from above. It has a lower hook portion 7 to be hooked. Further, in order to prevent the manual winch device 1 from falling off, the lower hook portion 7 is provided with a detachable screw 8. The attaching / detaching screw 8 is temporarily removed when the manual winch device 1 is attached to the antenna tower 2, and after the lower hook portion 7 is fitted into the horizontal frame 2, it is screwed to the lower hook portion 7. In this way, the manual winch device 1 is fixed to the antenna tower 2.
[0015]
Next, the structure of the manual winch device 1 will be described in detail. As shown in FIGS. 3 to 6, the manual winch device 1 has a casing 13 in which metal side plates 10 and 11 arranged in parallel to each other are connected by a plurality of pins 12, and is sandwiched between the side plates 10 and 11. The first and second pulleys 14 and 15 arranged in this manner are rotatably supported in the casing 13. The first pulley 14 located above is fixed to a first rotating shaft 16 extending so as to span between the side plate 10 and the side plate 11, and the first rotating shaft 16 is connected to the side plates 10, 11. Is rotatably supported by a bearing (not shown). Similarly, the second pulley 15 positioned below is fixed to a second rotating shaft 17 that extends so as to span between the side plate 10 and the side plate 11, and the second rotating shaft 17 is connected to the side plate. 10 and 11 are supported rotatably by bearings (not shown).
[0016]
Further, in order to interlock the rotation of the first pulley 14 and the second pulley 15, the first spur gear 21 is provided on the first rotating shaft 16 so as to be arranged in parallel with the first pulley 14. The second spur gear 22 is fixed to the second rotating shaft 17 so as to be juxtaposed with the second pulley 15, and the first spur gear 21 and the second spur gear 22 are connected to the casing 13. (See FIG. 8). Therefore, when the rotary handle 5 fixed to the tip of the first rotary shaft 16 is rotated in an arbitrary direction, the first pulley 14 and the second pulley 15 can be rotated in opposite directions.
[0017]
Further, in the manual winch device 1, the ratchet wheel 23 is fixed to the first rotating shaft 16 outside the casing 13 in consideration of work safety at the time of unloading, and the tooth portion of the ratchet wheel 23 is fixed to the side plate 10. A check claw 24 that engages with 23a is swingably attached. The check pawl 24 has a front end 24a urged to the ratchet wheel 23 by a spring (not shown), and the first rotating shaft 16 is stationary by the cooperation of the tooth portion 23a of the ratchet wheel 23 and the check pawl 24. It can only be rotated in one direction. Therefore, even when the operator releases his hand from the rotary handle 5 during unloading, the reverse claw 24 engaged with the ratchet wheel 23 prevents the rotary handle 5 from rotating in the reverse direction, and the load W falls midway. Such a situation is avoided. When unloading the load W from the antenna tower 2, the front end 24 a of the check claw 24 is removed from the ratchet wheel 23 while pushing the rear end 24 b of the check claw 24 with a finger, and the rotary handle 5 is rotated. The load W can be gradually lowered while being suppressed by hand.
[0018]
Further, the second rotary shaft 17 positioned below is disposed so as to be shifted laterally with respect to the first rotary shaft 16 positioned above. The rope R descending from above is hung on the lower second pool 15, and then hung on the first pulley 14 on the upper side so as to be S-shaped in the casing 13. It spans between the pulley 14 and the second pulley 15. Such spanning of the rope R is optimal for raising and lowering the load W such that a vertical load is applied to the rope R. That is, it is suitable for the case where the load W is raised and lowered using the fixed pulley 3.
[0019]
In this way, the manual winch device 1 merely spans the single rope R between the first pulley 14 and the second pulley 15, so that the unloading height depends on the height of the antenna tower 2. It is extremely easy to handle at different sites. In addition, the device 1 is downsized, has excellent portability, and is convenient to carry on site.
[0020]
Further, as shown in FIG. 7, a V-shaped tapered guide groove 30 is annularly provided on the outer periphery of the first and second pulleys 14, 15, and a pair of inclined surfaces 30 a, which form the guide groove 30, In 30b, irregularities appearing alternately in the circumferential direction are provided. And in each inclined surface 30a, 30b, the recessed part 32 and the convex part 33 appear alternately, and it protrudes in the other inclined surface 30b side so that the recessed part 32 which appeared in the one inclined surface 30a side may be faced. A concave portion 32 appears on the other inclined surface 30b side so that 33 appears and faces the convex portion 33 that appears on the one inclined surface 30a side. As a result, the guide grooves 30 of the first and second pulleys 14 and 15 meander in a zigzag shape in the circumferential direction. When the guide groove 30 having such a shape is employed, the contact area and the frictional resistance of the rope R with respect to the first and second pulleys 14 and 15 can be increased, and the rope with respect to the first and second pulleys 14 and 15 can be increased. R slippage can be reduced, and the efficiency of unloading work can be improved.
[0021]
In order to further increase the frictional resistance of the rope R with respect to the first and second pulleys 14 and 15, anti-slip friction powder (stainless powder) is attached to the inclined surfaces 30a and 30b. Thereby, the slip of the rope R with respect to the 1st and 2nd pulleys 14 and 15 is reduced, and further efficiency improvement of the unloading work is achieved.
[0022]
Further, in the manual winch device 1 described above, as shown in FIGS. 8 and 9, the auxiliary pulley 40 is disposed so as to be sandwiched between the side plate 10 and the side plate 11 just below the first pulley 14. The auxiliary pulley 40 has a smaller diameter than the first pulley 14 and is fixed to a third rotating shaft 41 extending so as to span between the side plate 10 and the side plate 11, and the third rotating shaft 41. Are rotatably supported by bearings (not shown) provided on the side plates 10 and 11. In order to interlock the rotation of the auxiliary pulley 40 and the second pulley 15, the third spur gear 43 is fixed to the third rotating shaft 41, and the second spur gear 22 and the third spur gear 43 are fixed. And mesh. As a result, the first pulley 14 and the auxiliary pulley 40 can be rotated in the same direction.
[0023]
Further, a V-shaped tapered guide groove 42 is annularly provided on the outer periphery of the auxiliary pulley 40, and a pair of inclined surfaces 42 a and 42 b (see FIG. 6) forming the guide groove 42 has a friction resistance of the rope R. In order to increase the friction, anti-slip friction powder (stainless powder) is adhered. As a result, slipping of the rope R is reduced, and the efficiency of the unloading work is further improved.
[0024]
Further, in order to appropriately press the rope R against the auxiliary pulley 40, the manual winch device 1 includes an adjustment screw 45 that moves forward and backward toward the guide groove 42. The adjustment screw 45 extends in the radial direction of the auxiliary pulley 40 and is screwed to a female screw portion 46 provided on the side plate 11 to allow arbitrary feeding to correspond to the diameters of various ropes R. . Therefore, the auxiliary pulley 40 can be used as a feed assist for the first pulley 14 by passing the rope R between the tip 45 a of the adjusting screw 45 and the guide groove 42 of the auxiliary pulley 40. Therefore, the rope R can be firmly attached to the first pulley 14, the contact area and the frictional resistance of the rope R to the first pulley 14 are increased, and the slip of the rope R with respect to the first pulley 14 is increased. To improve the efficiency of unloading work.
[0025]
The present invention is not limited to the embodiment described above. For example, the manual winch device 1 can be easily carried by making the rotary handle 5 detachable from the first rotary shaft 16. Furthermore, by providing a ratchet mechanism on the rotary handle 5 itself, only a rotational force in one direction can be transmitted to the first rotary shaft 16, and the efficiency of the unloading work can be further improved.
[0026]
【The invention's effect】
Since the manual winch device according to the present invention is configured as described above, the following effects are obtained. That is, a casing having a pair of side plates arranged in parallel to each other, a first pulley rotatably supported via a first rotation shaft arranged between the side plates, and a first pulley arranged between the side plates. The second pulley is rotatably supported via the two rotation shafts, and one end is attached to the first rotation shaft of the first pulley and the second pulley arranged in series with respect to the first pulley. By providing the rotary handle, the ratchet wheel fixed to the first rotary shaft, and the check claw that engages with the ratchet wheel, it is easy to carry and can easily handle even when the unloading height is different.
[Brief description of the drawings]
FIG. 1 is a front view showing an antenna tower equipped with a manual winch device according to the present invention.
FIG. 2 is a front view showing an embodiment of a manual winch device according to the present invention.
3 is a perspective view of the manual winch device shown in FIG. 1. FIG.
FIG. 4 is a front view showing a state in which a rotary handle is removed from a manual winch device.
FIG. 5 is a rear view showing the manual winch device.
FIG. 6 is a side view showing a manual winch device.
FIG. 7 is an enlarged view showing a pulley.
FIG. 8 is a front view showing a state in which one side plate is removed from the manual winch device.
FIG. 9 is a perspective view showing a relationship between an auxiliary pulley and an adjustment screw.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Manual winch apparatus, 5 ... Rotary handle, 10, 11 ... Side plate, 13 ... Casing, 14 ... 1st pulley, 15 ... 2nd pulley, 16 ... 1st rotating shaft, 17 ... 2nd rotating shaft , 23 ... ratchet wheel, 24 ... check claw, 30, 42 ... guide groove, 30a, 30b ... inclined surface, 32 ... concave part, 33 ... convex part, 40 ... auxiliary pulley, 45 ... adjustment screw.

Claims (5)

A casing having a pair of side plates arranged parallel to each other;
A first pulley rotatably supported via a first rotating shaft disposed between the side plates;
A second pulley that is rotatably supported via a second rotation shaft disposed between the side plates, and that is disposed in series with respect to the first pulley;
A rotary handle having one end attached to the first rotary shaft of the first pulley;
A ratchet wheel fixed to the first rotating shaft;
A manual winch device comprising a check pawl that engages with the ratchet wheel. 2. The manual winch device according to claim 1, wherein the second rotating shaft positioned below is disposed so as to be shifted laterally with respect to the first rotating shaft positioned above. 3. The auxiliary pulley disposed below the first pulley, and an adjustment screw that advances and retreats toward a tapered guide groove provided annularly on the outer periphery of the auxiliary pulley. Or the manual winch apparatus of 2 description. The inclined surfaces forming the V-shaped tapered guide grooves provided annularly on the outer circumferences of the first and second pulleys are provided with irregularities that appear alternately in the circumferential direction. Item 4. The manual winch device according to any one of Items 1 to 3. 5. The manual winch device according to claim 4, wherein anti-slip friction powder is adhered to the inclined surface.

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