JPH0480199A - balance winch - Google Patents

Abstract

PURPOSE:To artificially adjust elongation of a rope and efficiently life and bring down a net by automatically adjusting tension of a rope wounnd with a winch through movement due to rotational movement of arms of rolls as weight dancers, and moving the guide roll of an adjust roll. CONSTITUTION:Rolls as weight dancers 22a,22b are respectively provided over and under a winch 26, the weight dancers 22a,22b on the extreme ends of rotationally moving arms 23a,23b are rotationally moved at generating looseness on a rope 5, tension is always applied on the rope 5 to keep winding tension of the rope 5 around the winch 26, and slip is not generated. Further, by moving the guide roll 31 of an adjust roll 30, even at generation of elongation of the rope 5, it can be adjusted to absorb it. Hereby, lifting and bringing down of a net can be efficiently performed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to golf courses, golf practice ranges, baseball fields, etc., where a ball protection net for preventing abnormal fly balls is raised and lowered using a lifting rope. This invention relates to a balance winch that is extremely useful for use.

[Prior Art] In golf courses, golf practice ranges, and even baseball fields, heights of 3.
A ball-prevention net stretching from 0 to 40 meters has been erected. The design standard for this kind of ball protection net is that the strength of the pillars is 30 m.
The net is designed to be able to withstand wind speeds of 20 to 25 m/sec, and the net is to be pulled down to avoid damage from the wind when the wind speed reaches 20 to 25 m/sec.

Therefore, when a typhoon comes or strong gusts blow, the net must be lowered, but when the wind speed is 20 to 25 m/s
When the net reaches EE, a large amount of wind pressure is applied to the net, and when trying to lower the net, there is considerable resistance from the wind, and the net often does not come down easily. As a result, there have been occasional accidents where the nets have not been lowered and concrete supports have broken due to wind pressure.

Therefore, in recent years, there have been many cases in which a method is adopted in which an electric winch is used to lower the net, instead of using the net's own weight to lower it manually.

However, installing an electric winch to each support column increases equipment costs, so in many cases one winch is installed for every three supports.

Figures 3 and 4 show two specific examples of how the conventional lifting rope 16 is attached when the ball protection net 1 on three pillars is lifted and lowered by one winch 10. It is.

The net 1 is configured to be raised and lowered by a lifting rope 16 that reciprocates between an upper guide pulley 11 and a lower guide pulley 12, and the lifting rope 16 is moved back and forth by an electric winch 10 provided on a central column. . That is, when lowering the net 1, if the electric winch 10 is driven so that the lifting rope 16 moves in the direction shown by the arrow in each figure, the net 1 can be lowered by the electric winch 10 without depending on the net's own weight. It can be forcibly pulled down.

However, in the conventional configuration described above, in addition to the upper and lower guide pulleys 11 and 12, the horizontal guide auxiliary pulley 13.13 and the upper and lower guide auxiliary pulley 14
．． 14 or a large number of winch section auxiliary pulleys 15 are arranged, and the number of pulleys is as large as 12 in the case of Fig. 3 and 14 in the case of Fig. 4. The method of installing the mount is very complicated.

Furthermore, due to the complicated rope installation as mentioned above, the length of the rope becomes long (if the height is 40 m and the spacing between the supports is 10 m, the total length will be about 300 m), and the rope length will increase due to changes in temperature. There was also the problem that the net had a large amount of expansion and contraction, and a negative-shaft type winch would slip, making it difficult to raise and lower the net.

Therefore, the applicants proposed a separate method for attaching the lifting rope 5 using a simpler method, as shown in FIG. 2, and reducing the number of pulleys compared to the above-mentioned conventional example.

A guide rope 2 is stretched between the top of the support and the ground side, and a guide piece 6, such as an 8-shaped tube, can support and guide a lifting rope 5 for raising and lowering the net. 6 is attached so that the lifting rope 5 can be moved up and down along the guide rope 2, and the lifting rope 5
Fix the top of the net 1 to a part of the upper pulley 3. ．．
32 and lower guide pulley 4. ．． A vertical guide auxiliary pulley 8□, 82 is provided at a position spaced apart from the lifting surface of the net 1 between the upper guide pulley 31 and the upper guide pulley 31.
From there, through the vertical guide auxiliary pulley 8, through the lower guide pulley 42, and then through the pulley 32→82→43→
33 → A continuous lifting rope 5 is installed in a loop that passes through the horizontal auxiliary pulley 9, and the net can be lifted and lowered by moving the lifting rope 5 in forward and reverse directions using power. It is composed of:

[Problem to be solved by the invention] According to the method for installing the above-mentioned lifting rope, the number of columns is 3.
Not limited to books, lifting ropes can be freely looped and installed around 1 to 5 pillars, making it possible to raise and lower the net very efficiently.

However, of course, as the number of supports increases, a considerably stronger tension is applied to the winch when raising and lowering the net 1, and as mentioned above, when the length of the rope reaches 300 m, it is difficult to raise and lower the net. It is difficult to maintain tension on the rope at all times, and as the rope gradually stretches during use, the length must be adjusted quite frequently. Moreover, if too strong tension is applied, there is a risk that the concrete support will bend.

If the tension is weakened to avoid the problems mentioned above, other problems will occur, such as the rope slipping on the drum and making it difficult to raise and lower the net. The current situation is that - exists.

An object of the present invention is to solve the above-mentioned problems of the prior art in an extremely appropriate manner, to prevent slipping during winding on a winch even without applying strong tension over the entire length of the rope, and to prevent slippage during winding of the rope during use. The objective is to provide a new balance winch that makes it possible to adjust elongation or linear expansion and elongation due to seasons and temperature differences between day and night.

[Means for Solving the Problems] The present invention provides a winch configured to wrap a rope around a winch drum and apply tension to the rope in the forward and reverse directions by rotating the drum forward and backward. One tension adjustment unit is provided with a roll serving as a weight dancer installed at the end of an arm rotatably supported on the shaft, and the roll is wound around the winch by movement based on the rotation of the arm of the roll serving as a weight dancer. The tension of the rope can be automatically adjusted, and the amount of extension of the rope can be artificially adjusted by moving a guide roll of an adjustment roll provided below the winch.

[Function] When the net is pulled up and down, slack occurs in the rope above and below the winch, which reduces the winding tension of the rope around the winch and is the biggest cause of slippage. Therefore, rolls that act as weight dancers are installed above and below the winch, and when the rope becomes slack, the weight dancer at the end of the rotating arm rotates to constantly apply tension to the rope. If there is, the tension on the rope around the winch will be maintained and no slipping will occur.

Furthermore, by moving the guide roll of the adjust roll, even if the rope stretches, it is possible to absorb and adjust it.

[Examples] The present invention will be specifically described below with reference to Examples.

FIG. 2 shows a balance winch 20 according to the present invention installed as a drive source for the lifting rope 5 of a ball protection net, which is formed by arranging the lifting rope 5 in a loop shape, according to an installation method separately proposed by the applicant. FIG. 2 is an explanatory diagram showing the situation.

If the lifting rope 5 is wound in the direction of the dotted arrow by the balance winch 20, the net 1 will rise, and if it is wound in the direction of the solid arrow, the net 1 will be lowered.

Conventionally, problems have been caused by slippage of the rope on the circumference of the drum as described above during winding movement of the lifting rope 5, excessive tension load, or expansion and contraction of the rope due to elongation over time or temperature difference. There were always problems with slack and over-tensioned ropes.

Specifically, the balance winch 20 according to the present invention has a first
It consists of the configuration shown in the figure.

In the figure, 27 in the winch part 26 is a drum-shaped capstan that serves as a winch drum for applying tension, and the rope 5 is wound around the capstan 27 multiple times as necessary. It is rotated in forward and reverse directions, thereby applying tension to the rope 5 in the direction of the solid line or the direction of the dotted line.

In the present invention, a fixed base 29 is provided on the column body 21 (concrete post, steel tower, etc.), and the winch portion 26
is installed, while dancer supports 25a are installed above and below it.
, 25b are installed, and each dancer support 25a, 25
A dancer arm 23a123b having stoppers 24a and 24b is rotatably supported on b, and weight dancers 22a and 22b having a certain amount of weight and also serving as guide rolls for the rope 5 are mounted at the tip of the dancer arm 23a123b as shown in the figure. and said dancer support) 25a.

The weight dancer 22a122b is configured to be movable about the fulcrum 25b as shown by the arrow in the figure.

The winch section 26 may be installed on separate bases rather than on the same base. It is preferable that the stoppers 24a and 24b have a built-in compression spring. Having these stoppers 24a and 24b has the effect of facilitating the movement of the dancer 22a from (a) to (b) or the movement of the dancer 22b from (c) to (d) in accordance with the raising and lowering of the net. .

In the figure, in the situation shown by the solid line direction, the winch 2
6 is rotated and the wire rope 5 is moving upward,
It is in the direction of lowering the ball protection net.

In that case, since a strong tension is applied to the rope 5 below the winch 26, the dancer 22b is pushed back to the point where the stopper 24b is effective, and the dancer 22b is pushed back to the winch 26 in a straight line.
6. On the other hand, while the dancer 22a moves in the direction (a) to (b), the wire moves upward while absorbing the overall excess length.

Next, if the winch 26 is rotated in the direction to raise the net, that is, in the direction shown by the dotted line, the rope 5 will move in the direction shown by the dotted line, and tension will be applied to the rope 5 above the winch 26, causing the dancer 22a to move (a). is returned to the position. The lower dancer 22b moves from (c) to (d) under the action of the spring built into the stopper 24b, absorbing the extra length of the rope 5 and applying a slight tension to the rope 5. be able to.

This prevents the tension of the rope 5 on the winch 26 from becoming loose when the net is raised or lowered, and slipping on the capstan 27 can be completely prevented.

In addition, in FIG. 1, 30 is an adjustment roll,
By moving the position of the guide roll 31 between (e) and (e), it is possible to absorb and adjust the elongation when the rope 5 has elongated due to long-term use. be.

As a technique related to the present invention, an effective winch can be designed, for example, by separating the dancer from the winch and installing it at an appropriate location when pulling a truck sideways.

[Effects of the Invention] As described above, the winch according to the present invention can exhibit the following effects.

(1) It is a simple mechanism for raising and lowering a ball protection net at golf courses, golf practice ranges, and baseball fields, and can be used with peace of mind without requiring maintenance costs.

(2) It can be used safely even when used in conjunction with an anemometer.

(3) Since no abnormal tension is applied to the rope in the entire system, the wire will not be bent excessively, so there is no risk of the wire breaking or the ball collapsing.

(4) Rope elongation due to temperature differences in summer, winter, and day and night can be fully absorbed by the dancer's movements, but if the adjuster roll is used in conjunction with the wire rope, it can be easily adjusted even if the wire rope becomes abnormally elongated due to long-term use.

(5) Even if the number of columns in a combination of concrete posts is large, such as 1, 2, or 4, 5, or 6, any combination can be used because the wire can be easily stretched.

(6) Since the device is simple, it is inexpensive and has the advantage of being easy to install.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the operation of the embodiment according to the present invention, and FIG.
The figure is an explanatory diagram showing how the winch according to the present invention is attached to a ball protection net lifting device, and FIGS. 3 and 4 are explanatory diagrams showing two embodiments of the conventional ball protection net lifting device. 1: Net, 5: Lifting rope, 20: Balance winch, 21: Column, 22a, 22b: Weight dancer 23a, 23b: Dancer arm, 24a, 24b: Stopper 25a, 25b: Dancer arm, 26 : winch part, 27: hourglass capstan, 28 two guide rolls, 29: fixed base, 30 near-jast roll, 31 two guide rolls. 41-41 Lower part Id pulley 5: Lifting rope 6゛6-shaped tube 8x+8* Vertical direction or A Auxiliary boo 99' Horizontal direction A P Auxiliary pulley 20: Paran λ winch Fig. 2 Fig. 3 Fig. 4

Claims (1)

[Claims] (1) In a winch configured to wrap a rope around a single-wheel winch drum and apply tension to the rope in the forward and reverse directions by rotating the drum forward and backward, the shaft is rotatable up and down the winch drum. One tension adjustment unit with a roll acting as a weight dancer is installed at the end of each supported arm, and the tension of the rope wound around the winch can be automatically adjusted by movement based on the rotation of the arm of the roll acting as a weight dancer. The balance winch is configured such that the amount of stretch of the rope can be artificially adjusted by moving a guide roll of an adjustment roll provided below the winch.