JPH0636052Y2 - winch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a winch, and more particularly to a winch that can be pulled in both forward and reverse directions.

[Prior Art] A winch, for example, can be used to move a bogie inside or outside the factory,
It is also used to move heavy doors. The truck is usually required to reciprocate, and the heavy door is required to open and close. Therefore, in the winch used for the above-mentioned applications, it is desirable that the winch and the heavy door can be pulled in both forward and reverse directions.

[Problems to be solved by the invention] However, in the winches that have been conventionally used,
There were the following problems.

FIG. 6 shows a bogie 4 using two winding drum winches 1 and 2.
1 schematically shows a state of reciprocating. Rope 3
Is wound around the outer circumference of the cylindrical drum of the winding drum winches 1 and 2. Therefore, the winding drum winches 1 and 2 can be pulled only in one direction. In the figure, the cart 4 is
When the rope 3 is to be moved in the direction, the rope 3 is wound around the cylindrical drum of the one winding drum winch 1, and at the same time, the rope 3 is unwound from the cylindrical drum of the other winding drum winch 2. On the contrary, when the carriage 4 is to be moved in the B direction, the rope 3 is wound around the cylindrical drum of the winding drum winch 2 and the rope 3 is unwound from the cylindrical drum of the winding drum winch 1.

FIG. 7 shows a state in which the carriage 4 is reciprocally moved by using two endless winches 5 and 6. In this figure, when the carriage 4 is to be moved in the direction A, one endless winch 5 is rotationally driven in the forward direction and the other endless winch 6 is rotationally driven in the reverse direction. Conversely, when the carriage 4 is to be moved in the B direction, the endless winch 6 is rotationally driven in the positive direction and the endless winch 5 is rotationally driven in the reverse direction.

Thus, when the bogie 4 is reciprocally moved using the conventional winding cylinder winches 1 and 2 and the endless winches 5 and 6, two winches are required. However, using two winches is disadvantageous, for example, in terms of maintenance or space.

FIG. 8 is a diagram schematically showing a capstan winch 7 used to reciprocate the carriage 4. If the capstan winch 7 is used, the bogie 4 can be reciprocally pulled by one winch. In the figure, when attempting to pull the carriage 4 in the A direction, the capstan winch 7 is rotated in the C direction, and the portion of the rope 3 near the capstan winch 7 located on the a side is manually operated. A pulling operation is necessary. Conversely, trolley 4
When pulling the rope in the B direction, it is necessary to rotate the capstan winch 7 in the D direction and pull the rope located on the b side by hand. in this way,
By carrying out an extra manual operation in addition to the rotation of the capstan winch 7, it becomes possible to reciprocate the carriage 4 by one capstan winch 7. However, the manual operation as described above is troublesome and requires a lot of labor.

Therefore, an object of the present invention is to provide a winch that can be towed in both forward and reverse directions with only one unit and does not require manual operation.

[Means for Solving Problems] A winch according to the present invention includes a case, a winding drum,
Rope, first gripping roller, first sheave, second
And a second sheave. The winding drum is rotatably supported by the case and is rotationally driven in the forward and reverse directions. The rope is wound around the outer peripheral groove of the winding drum, and one extension portion thereof serves as a pulling side that receives a load, and the other extension portion serves as a relaxation side. The first grasping roller is attached to the case and grasps the rope by pressing the rope against the outer circumferential groove of the winding drum when the winding drum is rotationally driven in the forward direction. The first sheave is attached to the case, and the rope on the pulling side is attached to the winding drum so that the rope can be grasped by the first grasping roller when the winding drum is rotationally driven in the forward direction. Guide to the outer groove. The second gripping roller is attached to the case,
The rope is grasped by pressing the rope against the peripheral groove of the winding drum when the winding drum is driven to rotate in the opposite direction. The second sheave is attached to the case, and the rope on the pulling side is attached to the winding drum so that the rope can be grasped by the second grasping roller when the winding drum is driven to rotate in the opposite direction. Guide to the outer groove.

[Operation] When the winding drum is rotated in either forward or reverse direction, the rope is guided to the outer circumferential groove of the winding drum by the sheave and grasped by the grasping roller. Specifically, when the winding drum is rotated in the forward direction, the rope guided by the first sheave is grasped by the first grasping roller. When the winding drum is rotated in the opposite direction, the rope guided by the second sheave is grasped by the second grasping roller. Thus, according to the present invention, since the common case has the pair of gripping rollers and the pair of sheaves,
It is possible to pull in the forward and reverse directions with one winch.

[Embodiment] FIG. 1 is not an embodiment of the present invention, but is a view showing the internal structure of a winch that can be pulled in both directions. The winch shown in the drawing has a winding drum 10, a rope 3, a roller chain 11 as a grasping means for grasping the rope 3, and a rope 3 which is attached to an outer peripheral groove of the winding drum 10 when the rope 3 is pulled in the opposite direction. It has a guide jive 12 as a guide means for guiding to.

The winding drum 10 is rotatably supported by a case 14 via a shaft 13. Further, a V-shaped groove is formed on the peripheral surface of the winding drum 10. The rope 3 is inserted into the case 14 through the through hole 31 and wound around the outer peripheral groove of the winding drum 10. One extension portion of the rope 3 is a pulling side that receives a load, and the other extension portion is a relaxation side.

Although not shown, a motor is arranged on the paper front side or the paper spine side of the winding drum 10, and the rotation of the motor is transmitted to the winding drum 10 via a reduction mechanism. In this way, the winding drum 10 is rotationally driven in both forward and reverse directions by the motor,
Tow the rope 3.

The roller chain 11 as a grasping means is composed of a plurality of rollers.
It is configured by combining a 15, a link 16 and a roller shaft 17, and one end 18 thereof is fixed to the case 14. And, it is arranged so as to extend along the peripheral surface of the winding drum 10 as a whole, and the other end 19 is provided with a case via a shaft 20.
It is attached to a lever 21 rotatably supported by 14. The lever 21 is connected via a pin 22 to a joint 24 attached to a frame 25 via a shaft 23.

On the rope lead-out side located near the fixed end 18 of the roller chain 11, a rope lead-out metal fitting 27 for guiding the rope 3 is provided.
Are fixedly attached to the case 14 via screws 26.

Further, as shown in the figure, in the vicinity of the lead-out portion of the rope 3,
A guide sheave 12 is arranged. This guide sheave 12
Holder fixedly mounted on frame 25 via shaft 28
It is rotatably held by a shaft 29 via a shaft 30.

The winch shown in the drawing can pull the rope 3 in both forward and backward directions. When the rope 3 is pulled in the direction of arrow C, the winding drum 10 is rotationally driven in the forward direction, that is, clockwise in the drawing. The rope 3 located on the towing side has a through hole 32 formed in the holder 29 and a through hole of the case 14.
After passing through 31, it reaches the outer peripheral groove of the winding drum 10 and then grasped by the roller chain 11. During this forward pulling, the through holes 31 and 32 serve as a guide means for guiding the rope 3 of the pulling side portion to the outer circumferential groove of the winding drum 10.

When the winding drum 10 is rotationally driven in the forward direction, the tension Wc acts on the rope 3 located on the pulling side in the right direction in the figure,
On the other hand, the tension W having the same magnitude as Wc acts on the joint 24 in the left direction in the figure. As a result, the lever 21 rotates about the shaft 20 in the clockwise direction in the figure, that is, in the direction indicated by the arrow E. Therefore, the roller chain 11 presses the rope 3 strongly against the outer circumferential groove of the winding drum 10,
Grasp firmly. The gripping force by the roller chain 11 is proportional to the magnitude of the load Wc.

Next, when the rope 3 is to be pulled in the direction indicated by the arrow D in the figure, the winding drum 10 is rotationally driven in the opposite direction, that is, the counterclockwise direction in the figure. Guide sheave 12
The rope 3 on the pulling side is guided to the outer circumferential groove of the winding drum 10. That is, the load from the rope 3 is first applied to the guide sheave 12 and then to the outer peripheral groove of the winding drum 10. At this time, a frictional force is generated between the outer peripheral groove of the winding drum 10 and the rope 3, and the rope 3 is slightly grasped by the frictional force. Therefore, if the tension of Wd acts on the rope 3 in the right direction in the figure, the winding drum 10 tries to move in the right direction in the figure, and as a result, the lever 21 rotates in the direction indicated by the arrow E. As the lever 21 rotates, the rope gripping force of the roller chain 11 increases,
It is possible to pull the rope 3 in the opposite direction.

In the illustrated winch, the case 14 that rotatably supports the winding drum 10 and the holder 29 that rotatably supports the guide sheave 12 are formed of different members, but they are integrally formed. May be

The same applicant as the present application filed in Japanese Patent Application No. 58-200359
-93098) disclosed a winch in which the gripping force on the rope increases or decreases depending on the load to be pulled. This winch could be towed in only one direction, but it can be towed in both forward and reverse directions by making the following improvements. FIG. 2 is a view showing the internal structure of such a winch and is an embodiment of the present invention.

The winch shown in the drawing is a case 40, a winding drum 41 that is driven to rotate in both forward and reverse directions, a rope 3 that is wound around an outer circumferential groove of the winding drum 41, and a rope 3 that is pressed by pushing the rope 3 into the outer circumferential groove of the winding drum 41. Grasp the roller chain 4
4, 45, sheaves 42, 43 that guide the rope 3 of the pulling side to the outer circumferential groove of the winding drum 41, and the sheaves 42, 43 that are rotatably held and roller chains 44, 45, respectively.
And connecting members 46 and 47 for connecting the sheaves 42 and 43 to each other.

The roller chains 44 and 45 are constructed by combining a plurality of pressing rollers, links, and roller shafts, like the winch shown in FIG. One end 48 of the roller chain 44 is fixed to the case 40, and the other end 49 is connected to the connecting member 46. The other roller chain 45 has one end 50
Is fixed to the case 40, and the other end 51 is connected to the connecting member 47.

The connecting members 46 and 47 rotatably hold the sheaves 42 and 43, respectively. The connection structure between the sheave 43 and the connection member 47 is
Since the connecting structure between the sheave 42 and the connecting member 46 is substantially the same, only the connecting structure between the sheave 42 and the connecting member 46 will be described below.

A bearing 52 is incorporated in the inner surface of the sheave 42.
The outer ring of the bearing 52 is fixedly connected to the sheave 42, and the inner ring is fixedly connected to the connecting member 46. The inner ring of the bearing 52 may be directly connected to the connecting member 46, but a sheave guide 53 is fixedly incorporated in the inner ring in order to secure a sufficient space for the connection. A connecting member 46 is connected to the above via a pin 54. In this way, the sheave 42 is rotatably held by the connecting member 46.

The connecting member 46 is the other end of the roller chain 44 as described above.
The connecting member connects the 49 and the sheave 42.
46 has a guide elongated hole 55 extending in the connecting direction. A guide post 56 supported by the case 40 is inserted through the long guide hole 55. The sheave guide 53 also has an elongated hole corresponding to the elongated guide hole 55.

The winch shown in FIG. 2 can be pulled in both forward and reverse directions, and its operation will be described below.

Now, assuming that tension acts on the rope 3 in the direction of arrow A,
The portion of the lobe 3 that is bent by the sheave 42 tries to extend straight. The force of the rope 3 trying to extend straight is transmitted to the sheave 42. Then. The sheave 42 and the connecting member 46 connected to the sheave 42 are urged by the force of straight extension of the rope 3 to guide the elongated guide hole.
It moves to the right in the figure along the length direction of 55. The displacement amount is substantially proportional to the load applied to the rope 3.

When the sheave 42 and the connecting member 46 move to the right, the gripping force of the rope by the roller chain 44 increases accordingly. The gripping force of the rope by the roller chain 44 is substantially proportional to the displacement amount of the sheave 42 and the connecting member 46. This means that the gripping force of the rope by the roller chain 44 is approximately proportional to the load applied to the rope 3.

Next, when trying to pull in the opposite direction to the above, the winding drum 41 may be rotationally driven in the opposite direction. That is, when tension acts on the rope 3 in the direction of arrow B, the sheave 43
And the connecting member 47 moves leftward in the drawing. As a result, the gripping force of the rope by the roller chain 45 is increased, and the rope can be reliably pulled.

FIG. 3 is a diagram schematically showing the internal structure of still another embodiment of the present invention. The winch shown is the case 60
The winding drum 61 that is driven to rotate in both the forward and reverse directions, the rope 3 that is wound around the outer circumferential groove of the winding drum 61, the roller chains 63 and 64 that grasp the rope 3, and the rope on the pulling side. Guide sheave that guides to the outer peripheral groove of the drum 61
It has 65 and 66. One end 63a of the roller chain 63,
It is fixedly attached to the case 60, and the other end is connected to the rotating member 67. The rotating member 67 is rotatably attached to the case 60 via a shaft 69. A joint 71 is attached to the rotating member 67. The other roller chain 64
The one end 64a is fixedly attached to the case 60, and the other end is connected to a rotating member 68 rotatably provided via a shaft 70. A joint 72 is also attached to the rotating member 68.

The winch shown can also be pulled in both forward and reverse directions. Now, assume that the winding drum 61 is rotationally driven in the clockwise direction in the drawing. At this time, tension acts on the rope 3 in the direction of arrow A, and tension in the opposite direction acts on the joint 71. That is, the tension in the direction indicated by the arrow B acts on the joint 71. As a result, the rotating member 67 rotates about the shaft 69 in the direction indicated by the arrow C. This rotating member
As the 67 rotates, the gripping force of the rope by the roller chain 63 increases.

Next, when pulling in the opposite direction to that described above, the winding drum 61 is rotationally driven in the counterclockwise direction. Tension in the direction indicated by arrow D acts on the rope 3, and arrow E acts on the joint 72.
Tension acts in the direction indicated by. As a result, the rotating member 68
Rotates in the direction indicated by the arrow F, and the gripping force of the rope by the roller chain 64 increases accordingly.

FIG. 4 is a diagram schematically showing the internal structure of still another embodiment of the present invention. The winch shown is the case 80
, A winding drum 81 that is driven to rotate in both forward and reverse directions, the rope 3 that is wound around the winding drum 81, and two rotating members 8
It has 2 and 83. The rotating member 82 is rotatably provided on the case 80 via a shaft 88. A gripping roller 84 that grips the rope 3 by pressing the rope 3 against the outer circumferential groove of the winding drum 81 is attached to one end of the rotating member 82. A guide sheave 86 is provided at the other end of the rotating member 82 for guiding the rope on the pulling side to the outer peripheral groove of the winding drum 81. Similarly, the other rotating member 83 is rotatably provided on the case 80 via a shaft 89. A grasping roller 85 is attached to one end portion thereof, and a guide sheep 87 is attached to the other end portion thereof. With the winch having such a configuration, it is possible to pull in both forward and reverse directions.

Now, suppose that the winding drum 81 is rotationally driven counterclockwise. Then, tension acts on the rope 3 in the direction indicated by the arrow A,
The part bent by the guide sheave 86 tries to extend straight. That is, the rope 3 presses the guide sheave 86, and as a result, the rotating member 82 rotates in the direction indicated by the arrow B. By the rotation of the rotating member 82, the grasping force of the rope by the grasping roller 84 increases.

Next, when pulling in the opposite direction to that described above, the winding drum 81 is rotationally driven in the clockwise direction. Then, tension in the direction indicated by the arrow C acts on the rope 3 to press the guide sheave 87. As a result, the rotating member 83 is moved to the arrow D.
The gripping force of the rope by the gripping roller 85 is increased by rotating in the direction indicated by.

In the embodiment shown in FIGS. 2 and 3, the roller chain is used to grasp the rope wound around the winding drum, but in the embodiment shown in FIG. 4, instead of the roller chain. Uses a grasp roller. The roller chain is a concept included in the grasping roller.

FIG. 5 schematically shows a state in which the bogie 4 is reciprocally moved using the winch according to the present invention. Winch 100
The rope 3 is wound around the winding drum. One end of the rope 3 is wound around the pulley 101 and then fixedly attached to the right end portion of the carriage 4. The other end of the rope 3 is attached to the left end portion of the carriage 4. When moving the carriage 4 in the direction indicated by the arrow A,
The winch 100 winding drum is driven to rotate counterclockwise in the figure. On the contrary, when the carriage 4 is to be moved in the direction indicated by the arrow B, the winding drum of the winch 100 is rotationally driven in the clockwise direction.

[Advantage of Invention] As described above, in this invention, the first case is formed on the common case.
And a second gripping roller and first and second sheaves. When the winding drum is rotationally driven in the forward direction, the rope guided by the first sheave is grasped by the first grasping roller. When the winding drum is driven to rotate in the opposite direction, the rope guided by the second sheave is firmly grasped by the second grasping roller. Therefore, it becomes possible to pull the rope back and forth with one winch without requiring manual operation.

The winch according to the present invention can be reciprocally towed by only one unit as compared with the conventional winch shown in FIGS. 6 and 7, which is advantageous in terms of maintenance and storage space. Become. Also, the labor is significantly reduced compared to the conventional capstan winch. Furthermore, the winch according to the invention allows the use of endless ropes, so that the tow length can be freely set. Further, the pulling direction can be freely set.

The winch according to the present invention having the above-described effects can be used to move a bogie inside or outside the factory, open or close a heavy door, open or close a hatch cover, or move a stage device (such as a large tool). It is effectively used to do.

[Brief description of drawings]

FIG. 1 is a view showing the internal structure of a winch capable of being pulled in both forward and reverse directions, which is not an embodiment of the present invention. FIG. 2 is a diagram showing the internal structure of the embodiment of the present invention. Third
The figure is a diagram schematically showing the internal construction of another embodiment of the present invention. FIG. 4 is a diagram schematically showing the internal structure of still another embodiment of the present invention. FIG. 5 is a diagram schematically showing a state in which the bogie is reciprocally moved using the winch according to the present invention. FIG. 6 is a diagram schematically showing a state in which a bogie is reciprocally moved by using two winding drum winches. FIG. 7 is a diagram schematically showing a state in which a bogie is reciprocally moved using two endless winches. FIG. 8 is a diagram schematically showing a state in which a bogie is reciprocally moved using a capstan winch. In the figure, 3 is a rope, 40 is a case, 41 is a winding drum,
42 and 43 are sheaves, 44 and 45 are roller chains as grasping rollers, 60 is a case, 61 is a winding drum, 63 and 64 are roller chains as grasping rollers, 65 and 66 are guide sheaves, 80 is a case, 81 is A winding drum, 84 and 85 are grasping rollers, and 86 and 87 are guide sheaves.

Claims (1)

[Scope of utility model registration request] 1. A case (40, 60, 80), a winding drum (41, 61, 81) rotatably supported by the case and rotationally driven in forward and reverse directions, and an outer periphery of the winding drum. A rope (3) wound around a groove, one extension portion of which is a pulling side for receiving a load and the other extension portion of which is a loosening side, which is attached to the case, and the winding drum is rotationally driven in the forward direction. A first grasping roller (44, 63, 84) for grasping the rope by sometimes pressing the rope against the outer circumferential groove of the winding drum, and the winding drum attached to the case and rotating in the forward direction. The first sheave (4) that guides the rope on the pulling side to the outer peripheral groove of the winding drum so that the rope can be grasped by the first grasping roller when
A second grip attached to the case to grip the rope by pressing the rope against an outer circumferential groove of the winding drum when the winding drum is driven to rotate in the opposite direction. A roller (45, 64, 85) and a pulling side attached to the case so that the rope can be grasped by the second grasping roller when the winding drum is rotationally driven in the opposite direction. The second sheave (4
3,66,87), and a winch.