JPH0553156B2 - - Google Patents

Description

[Detailed Description of the Invention] <Object of the Invention><Industrial Field of Application> The present invention relates to a ball protection device whose main component is a ball protection net that is installed, for example, at a golf driving range and prevents balls from flying to the outside. In particular, this invention relates to a novel configuration that allows the ball protection net to be reliably raised and lowered.

<Background of the Invention> As is well known, a golf driving range is connected to adjacent houses, etc.
To prevent the ball from flying out to other facilities,
A high ball-protection net is placed around the area. There are many types of these, ranging from those in which a ball-protection net is simply stretched over a support column to those in which the ball-protection net is pulled down in the event of strong winds. However, even if the conventional type is capable of being pulled down in case of strong winds, it has not been able to perform its function satisfactorily. That is, conventionally, for example, the upper edge of the ball-protecting net is suspended by a wire directly from a support or via a pulley, and by loosening the wire, the ball-protecting net is lowered and retracted by its own weight. And since there are almost no special measures beyond that, even if you actually try to pull down the ball net in strong winds, the ball net gets blown up by the wind and gets pushed against the support, creating a lot of resistance. In reality, in such a situation, it is no longer possible to withdraw. Of course, there is a method of forcibly pulling the ball net downwards instead of relying on its own weight, but as mentioned earlier, when the ball net is pressed against a support etc. If such a pulling operation is performed, the ball protection net that is hooked to the support will break, so it cannot actually be pulled down. For this reason, in the past, most ball protection nets that were once installed had to be maintained.
Except for maintenance, replacement, etc., it remains in place even during strong winds, and as a result, it is prone to damage and is required to be strong enough to support the ball protection nets that are blown up in strong winds. The load capacity of the equipment must also be large, resulting in a large-scale construction and increased equipment costs. In addition, although the strength of pillars, etc. is designed based on the expected maximum wind force and an appropriate safety factor, this is based on the premise that the wind will blow through between the ball shields, so for example, If signboards, vinyl sheets for agriculture and gardening, etc. become stuck to the ball-proof net due to air pollution, they will be subjected to significant wind pressure, which could lead to an unexpected situation such as the entire device collapsing.

<Prior Art> In view of this background, the present applicant has developed a new golf driving range, etc., which allows the ball net to be raised and lowered reliably at all times, and which is fully equipped with protection and safety measures for the ball net. He has made many attempts to develop ball protection devices and has already applied for a patent. For example, as shown in FIG.
A suspension beam B is provided in an overhanging manner from the upper end, and a guide wire G is stretched between the tip of the suspension beam B and the ground.The winch wire 16 is guided by the guide wire G. An elevating beam 9' suspended from the elevating beam 9' is provided, and a ball protection net 11' is suspended from the elevating beam 9'. In the case of such a configuration, if the ball protection net 11' bends toward the support column 3' due to the wind, an extremely large force is applied to the guide wire G, and as a result, the skeleton shown in Fig. 15b is As shown in Figure 2, a force F ₁ that pulls the tip of the suspension beam B downward acts as a force F 1 , which causes, for example, buckling stress on the main truss member a ₁ ′ on the fairway side of the support column 3 ′ to which the truss member is applied. On the other hand, the outer main truss member a′ is subjected to a tensile load F ₃ , so the main truss member a′ on the fairway side _in particular is Therefore, the pipe diameter of the support column 3' itself or the main truss member a', which is a component thereof, had to be extremely large.

<Technical matters attempted to be developed> The present invention is an attempt to improve the prior art as described above, and is designed to prevent such bending moment from being applied to the pillars even when the ball protection net is exposed to wind. This is an attempt to develop a ball protection device for golf driving ranges and the like that has a novel configuration that does not work.

<<Structure of the Invention>><Means for Achieving the Object> That is, the first invention of the ball protection device for a golf driving range, etc. according to the present application is a ball protection device for a golf driving range, etc., in which the external In this device, the support has a triangular cross section, and a support rail is provided along the support on the fairway side, and a number of slide pieces are secured to the support rail, and the slide piece is used to prevent a ball from flying into the air. At the same time, a ball-proof net is stretched between the pillars.
The ball-preventing net is characterized in that its upper end is suspended from the lifting beam.

In addition to the above-mentioned requirements, the second invention of the present application is characterized in that each of the pillars and the lifting beam has a truss structure.

Furthermore, in addition to the above-mentioned requirements, the third invention of the present application is characterized in that the upper end of the ball-prevention net protrudes toward the fairway side in the form of an eave.

These configurations are intended to achieve the above object.

<Operation of the Invention> In the present invention, the anti-ball net whose upper end is attached to the lifting beam is held at a position along the column via a slide piece to the guide rail attached to the column. Even if the ball net bends due to the wind, there is no bending moment applied to the support column due to the tension of the guide wire, unlike in conventional models.
The load on the pillars can be significantly reduced. Furthermore, since the slide piece is slidably attached to the guide rail, its lifting and lowering operations are performed smoothly. Also, as defined in claim 3,
When the upper edge of the ball protection net extends like an eave toward the fairway side of the golf course,
For example, if a golf ball has a lot of spin and the ball climbs over a ball net, the ball will be guided to fall onto the fairway side and will be completely prevented from flying out. Ru.

<Examples> The present invention will be specifically described below based on illustrated examples. Reference numeral 1 denotes a ball protection device according to the present invention, which is installed around a flight range of a golf driving range, for example. It goes without saying that the present invention itself is not limited to such golf driving ranges, but can be used to regulate the range of various other types of flying balls or other projectiles. When installing this ball protection device 1, first, a suitable foundation 2 made of concrete is provided on the ground, and a support 3 is erected on this foundation. A preferred embodiment of this foundation is one in which the lower part of the column 3a is housed in a submerged foundation box 2a as shown in Fig. 4, and concrete C is poured into it. The width required for this can be reduced to about 1/4 of the conventional width, and the site can be used more effectively. This support 3 is made of a high-tensile steel pipe that has been subjected to an appropriate anti-rust treatment such as hot-dip galvanizing, and is formed by dividing it into several stages depending on the height.
Connect them sequentially to form. Further, it is more preferable that these supports 3 have a triangular cross section and have a truss structure as defined in claim 2. In addition, when this support 3 is made into a truss structure,
The truss structure includes, for example, three main truss members a extending in the longitudinal direction, cross truss members b provided orthogonally to these members, and a brace truss member c formed between the cross truss members b. Of course, each truss member can be assembled in an appropriate manner. These columns 3 are connected to each other by a joint beam 5 at almost the upper end thereof, and as a result, each column 3 as a whole becomes a rigid frame structure, further improving the rigidity as a whole. let Of course, in terms of design, each support column 3 alone independently provides sufficient rigidity as a tower structure. Furthermore, as a characteristic configuration of the present invention, each support 3
Of the three main truss members a in
One main truss member _a1 located on the fairway side is provided with a guide rail 6 on the fairway side over almost its entire height. 6 is connected. The guide rail 6 has a T-shaped cross section as shown in FIG. 6, for example, and a number of slide pieces 7 having sliding surfaces surrounding the guide rail 6 are slidably fitted onto the guide rail 6. Attached to the state. Of course, in order to improve the sliding condition of both sliding surfaces, appropriate methods such as applying appropriate grease or the like, applying a synthetic resin coating without oiling, or interposing ball bearings, etc., can be used. can be taken. Of course this sixth
In addition to the embodiment shown in the figure, various embodiments may be adopted as described later. The lifting beam 9 is also guided by the guide rail 6.
As an example, an elevating beam 9 made of a three-dimensional truss with a triangular cross section is slidably held on the guide rail 6 via an elevating beam slide piece 9a attached to the back surface of the elevating beam 9. A ball protection net 11 directly responsible for the ball protection function is stretched below the lifting beam 9 so as to be suspended downward. This anti-ball net 11 is held at regular intervals in the vertical direction along the support 3 by a large number of slide pieces 7 attached to the guide rail 6 as a characteristic feature of the present invention. Specifically, it is Bokyu Net 11.
Clip 7a to core wire 11w in
Fixed by Regarding the relationship between this anti-ball net 11 and the pillar 3 to which a triangular cross-section truss is applied, as shown in an enlarged view in FIG. 6, the apex of the triangular cross section of the pillar 3 is on the anti-ball net 11 side. is desirable. This is because even if the net 11 bends due to the wind, contact between the ball protection net 11 and the support 3 can be prevented. Regarding the elevating and lowering mechanism of the elevating beam 9 that supports the ball protection net 11, the elevating and lowering mechanism is performed by a winch unit 13, and the winch unit 13 is connected to a reducer 14 and a motor _M1. A drive unit mainly consisting of
It is composed of a winch drum 15 as a main body and a winding part. That is, the output shaft of the reducer 14 is directly connected to the main shaft of the winch drum 15, and the winch wire 16 is wound around the winch drum 15, while the working end of the winch wire 16 is directed upward along the support 3. Then, it is guided by guide rollers 17 provided on the base end side and the distal end side of the upper part of the support column 3 so as to be bent in an appropriate direction by 90 degrees,
Its end is connected to the lifting beam 9. A limit switch 18 is attached to an appropriate position on the support 3 to set the top dead center and bottom dead center of the lifting beam 9. The member that touches the limit switch 18 to operate it is the winch wire 16.
Utilizes itself or an actuating piece attached to it. Furthermore, a wind/wind vane 20 is installed above the appropriate pillar, and this detects the surrounding wind condition. Based on this data, the elevating beam that suspends the ball protection net 11 is installed. It is also possible to automatically perform the lifting/lowering control of 9. Of course, it is also possible for the administrator to constantly monitor the data of the wind/wind vane 20 and set it manually.

Although the present invention is exemplified by the specific embodiments described above, various embodiments may be taken in terms of the entire structure or partial structure. First, in the overall configuration of the embodiment shown in FIG. 8, compared to the type already particularly shown and explained in FIGS. 1 and 2, the embodiment shown in FIG. different. In this case, the support 3 itself has sufficient rigidity, so there is no joint beam 5 at the upper end.
It has a shape in which the pillars 3 are installed independently. In addition, in the case of the type that does not include the joint beam 5, it is only necessary to install the supports 3 independently, so there is no need to set mutual dimensions extremely strictly, and the construction work is facilitated. This is preferable.

Furthermore, various embodiments may be employed in the interconnection structure of the guide rail 6, slide piece 7, and antiball net 11, which is a characteristic structure of the present invention. For example, the one shown in FIG. 9a is one in which a guide rail 6 is fitted to the open end side of a slide piece 7 which has a substantially U-shaped cross section in plan view, and a roller 7R is provided to press it from the back side. It is. Also, the roller 7R shown in Fig. 9b is
When viewed from above, four guide rails 6 are attached so as to sandwich them from both the back and front surfaces. Furthermore, the guide rail 6 shown in FIG.
It was supported in such a way that it was incorporated into the system. Even in such a case, it is possible to attach a bearing, a synthetic resin coating with an excellent sliding function, a roller, or the like to the sliding surface as appropriate. Furthermore, in the embodiment shown in FIG. 10, two guide rails 6 are attached in parallel to one support 3, so that slide pieces 7 can be attached alternately in the height direction. Incidentally, with this configuration, when the ball protection net 11 is completely lowered, it can fit more comfortably and the height can be set lower. Of course, such a technical idea may take the form of installing the guide rails 6 in parallel, or in parallel, front and back, as shown in FIG. 11. Furthermore, in the embodiment shown in FIG. 12, a pantograph-shaped link 10 is provided without directly supporting the ball protection net 11 on the slide piece 7 in order to prevent interference with the pillar 3 when the ball protection net 11 is raised and lowered. In this case, even if the ball protection net 11 is exposed to wind while being pulled up while being relatively unstrung, the ball protection net 11 will remain intact. It can be arranged to be sufficiently far away from the support column 3 so that there will be no interference therewith.

Furthermore, since the ball protection net 11 and the elevating beam 9 are guided by the guide rail 6 as in the present invention, for example, the elevating movement of the elevating beam 9 can be carried out using a suspension method using the winch wire 16. Elevating and lowering operations can be performed without lifting. That is, as shown in FIG. 13, a drive motor _M2 is attached to the lifting beam 9, and the drive motor M2 is transmitted to the pinion gear 30 via a suitable reduction gear, while a rack 31 is connected along the guide rail 6 correspondingly. It is also possible to provide a so-called rack and pinion mechanism to move up and down. Of course, the pinion gear 30 may be replaced with a normal spur gear or helical gear.
It may be in the form of a worm gear. In the case of such a configuration, power is supplied to the drive motor M ₂ by a cable line that follows the method of stretching the winch wire 16, or by arranging a trolley wire near the guide rail and, for example, using a brush-shaped terminal. It is also possible to adopt a configuration in which power is supplied while rubbing. Furthermore, as another embodiment, the following method can be used to extend the ball protection net 11. In other words, if the ball protection net 11 is simply stretched vertically, for example, when a golf ball hits near the top end and a rotational force or spin is applied to the golf ball, the golf ball will behave as if it were a golf ball. There are cases where the ball rolls up the vertical surface of the ball protection net 11 and flies out to the outside, and this is a countermeasure for such cases. That is, the upper end of the ball protection net 11 is configured to protrude like an eave toward the fairway side as shown in FIG. 14. Of course, as a specific example of projecting out like an eaves, as shown in FIG. By doing so, an eave-like projecting portion 11a that faces diagonally upward is formed. Of course, in addition to this, there is also an elevating beam 9 as shown in FIG.
A sub-frame is further provided at the upper end so that the anti-ball net 11 extends horizontally to form an eave-like projecting portion 1.
1a, or, as shown in FIG. 14c, a sub-frame may be horizontally projected from the lower end side of the lifting beam 9 to form an eave-like projecting portion 11a.

The specific structure of the ball protection device for a golf driving range or the like according to the present invention has the above-mentioned configuration, and operates as follows. For example, if we talk about a type in which the ball protection net 11 is raised and lowered by the winch wire 16, the ball protection net 11
When the winch drum 15 is fully lowered,
The winch wire 16 that is wound around the winding wire 16 is also in a state where most of it is unwound, leaving a loosely wound portion.
To stretch the ball protection net 11 from this state, start the motor _M1 by an appropriate switching operation,
The rotation is transferred to the winch drum 1 via the reducer 14.
5, and the winch wire 16 is sequentially wound. When doing this, the tip of the winch wire 16 rises, lifting and moving the lifting beam 9 upward. At this time, the anti-ball net 11 rises while being held at a position along each pillar 3 by a slide piece 7 that is slidably guided by a guide rail 6 provided along the pillar 3. I'm going to go.
In reality, each piece-shaped slide piece 7 is sequentially moved by the ball-protecting net 11 which is pulled up as the elevating beam 9 rises and falls. When the motor _M1 continues to be driven in this manner, the winch wire 16 contacts the limit switch 18 for detecting the top dead center at a position where the winch wire 16 is completely wound up, and the drive is stopped. Of course, it is not necessary to always tension the ball protection net 11 to the top dead center, and it is also possible to leave it stretched at an appropriate height. Even if the ball protection device 1 is exposed to excessive wind force in such a stretched state, the ball protection net 11 will remain in a state as if it were directly supported by the pillar 3 via the slide piece 7 and the guide rail 6. Therefore, at a position along the pillar 3, there is no possibility of bending toward the pillar 3. Therefore, the ball-prevention net 11 does not become entangled with the pillar 3, and can be reliably lowered in strong winds by performing the reverse operation of raising it.
Furthermore, in strong winds, the support columns 3 have a truss structure, which allows the wind to flow through them sufficiently, minimizing wind resistance. In the above-described embodiment, the fly ball range of the golf driving range is formed as one unit that is surrounded by a substantially U-shaped planar shape, but the ball protection net 11 is formed as a small unit in which the net 11 is further divided into a large number of parts. The desired shape may be obtained by appropriately combining the base numbers. In this case, the height of the ball protection net 11 can be set differently for each small unit.

<<Effects of the Invention>> The present invention has the configuration as described above, and the anti-ball net 11 is supported via the slide piece 7 with respect to the guide rail 6 fixed to the pillar 3. Even when the ball protection net is exposed to strong winds, no unreasonable stress is applied to the pillars 3, and as a result, the pillars 3 can be designed with a lower stress resistance. By the way, the 15th issue mentioned earlier
In the conventional type shown in the figure, when the ball protection net 11 is stretched at a height of 30 m, for example, the main truss member _a1 ' on the fairway side is constructed as shown in the two-dot chain line in Fig. 6. A high-tensile steel pipe with a diameter of approximately 165 mm was required, but in terms of design, the main truss member can be constructed from a high-tensile steel pipe with a diameter approximately half that diameter. This in turn can further reduce wind resistance to the struts 3, resulting in an overall more advantageous design. In addition, at the position along the pillar 3, the ball protection net 11 is in a state as if it were directly supported by the pillar 3, so the ball protection net 11 may become entangled with the pillar 3 etc. under strong winds or be intermittently stirred. The lifting and lowering operations can be performed reliably at all times without causing contact with other objects.
Significantly reduces its damage. This in turn reduces the cost of replacing and repairing the ball protection net 11, and since repair work can be done with the ball protection net 11 lowered, there is no need to work at heights, which also reduces work costs. These functions work synergistically to achieve a significant reduction in maintenance and management costs compared to conventional systems. Further, in the invention defined in claim 1, the supports 3 may be provided independently or may be connected to each other at the upper ends by the beams 5, but in the case where the supports 3 are provided independently, In this case, the columns 3 do not have to be precisely positioned with respect to each other at their upper ends, and the installation work can be performed extremely easily. Incidentally, when installing the beams 5, the upper ends of the columns 3 must be positioned accurately relative to each other, otherwise it will be impossible to connect the beams 5, and the assembly work will be extremely time-consuming. . Further, as defined in claim 1 or 2, when the support 3 and the like have a truss structure and have a triangular cross section, it is lightweight and has sufficient strength while minimizing wind resistance. The triangular cross section has superior torsional rigidity compared to, for example, a rectangular cross section, and a sufficient strength effect can be obtained with a minimum amount of materials. In particular, as already mentioned, since the bending moment applied to the main truss member a becomes smaller, the diameter of the main truss member a can also be made smaller, so this effect can be exerted more synergistically. . Furthermore, in the case of the present invention, especially when a trussed tower structure is used, sufficient strength can be obtained by itself, so the distance between the columns can be made sufficiently large.
Therefore, almost no radio wave interference occurs to the surrounding area. Furthermore, when the eave-like projecting portion 11a is provided so as to protrude toward the fairway side at the upper end of the ball-protecting net 11 as defined in claim 3, even if the golf ball is subject to spin, the golf ball This completely prevents the ball from climbing up the ball protection net 11 and falling to the outside.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing how the ball protection device of the present invention is used at a golf driving range, etc., Fig. 2 is a front view of the same as above, Fig. 3 is a side view showing an enlarged support column, and Fig. 4 is the basic structure. FIG. 5 is a side view showing an enlarged upper part of the support column; FIG. 6 is a cross-sectional view taken along the line shown in FIG. 5;
The figure is an enlarged perspective view showing the vicinity of the winch unit, FIG. 8 is a perspective view showing an embodiment of the ball protection device without a joint beam, and FIG. 9 is a perspective view showing various combinations of the guide rail and slide piece. FIG. 10 is a perspective view showing an example in which guide rails are provided in parallel; FIG. 11 is a cross-sectional view showing an example in which guide rails are provided in parallel before and after the same; FIG. 12 is a cross-sectional view showing an example. 13 is a side view showing an embodiment in which a pantograph-like link is attached, FIG. 13 is a side view showing an embodiment in which lifting and lowering operations are performed by a rack and pinion mechanism, and FIG. FIG. 15 is an explanatory diagram schematically showing various embodiments provided with a projecting portion, and FIG. 15 is a side view showing a conventional ball protection device, and an explanatory diagram showing a part thereof in an enlarged manner. 1...Ball protection device, 2...Foundation, 2a...Submarine foundation box, 3...Strut, 3a...Lower part of the support, 5
...Joint beam, 6...Guide rail, 6
a...Bracket, 7...Slide piece, 7a
...Clip, 7R...Roller, 9...Lifting beam, 9a...Slide piece for lifting beam, 10
... link, 11 ... ball protection net, 11a ... eave-like overhang, 11w ... core wire, 13 ... winch unit, 14 ... speed reducer, 15 ... winch drum, 16 ... winch wire , 17... Guide roller, 18... Limit switch, 20...
...Wind force/wind vane, 30...Pinion gear, 31...
...Rack, a, a ₁ ...Main truss member, b
...Cross truss member, c...Brace truss member, C...Concrete, _M1 ...Motor, _M2 ...Drive motor.

Claims (1)

[Scope of Claims] 1. In a device that prevents balls from flying to the outside by using a prop as a part of the support member and extending a ball prevention net, the prop has a triangular cross section, and a fairway is provided along the prop. A support rail is provided on the side,
A number of slide pieces are locked to this support rail, and the ball-prevention net is stretched to the support by the slide pieces, and the ball-prevention net is attached to the lifting beam at its upper end in a suspended state. A ball protection device for a golf driving range, etc., characterized by: 2. The ball protection device for a golf driving range or the like according to claim 1, wherein each of the pillars and the elevating beam has a truss structure. 3. The ball protection device for a golf driving range or the like according to claim 1 or 2, wherein the ball protection net has an upper end projecting like an eave toward the fairway side.