JPH0527963Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> This invention increases the durability of the expanded metal that makes up the movable floor, and also allows the movable floor to deform as it moves up and down into a smooth curved surface.
The present invention also relates to a golf practice device designed to simplify assembly work.

<Prior art and its problems> The best way to improve your golf skills is to practice on a golf course, but due to geographical, time, or economical issues, it is difficult to play golf partially. Exercise equipment that allows this has already been developed.

For example, the putter practice device shown in FIG. 7 is one such device, in which artificial turf b is stretched over a table a having fixed undulations, and a cup c is formed in a part. According to this, although the structure was extremely simple and suitable for mass production, there was a problem that the undulating state could not be changed, the pattern could not be specified, and the effect of practice could not be expected. For example, as a method that changes the ups and downs,
50-13176, JP-A-52-540, JP-A-Sho
63-262165 and Japanese Patent Application Laid-Open No. 63-51876, there are artificial turfs that partially rise in the shape of a cone, or that move up and down. The movable floor often has ridgelines, creating a situation that is quite different from that of a green field.

Therefore, in order to solve the above-mentioned problems, the inventors of the present invention proposed a golf practice device in which artificial turf is arranged on the upper surface of a movable floor that partially moves up and down. In this method, the movable floor is made of expanded metal so that the uneven surface changes continuously, thereby eliminating the appearance of ridge lines on the artificial grass surface and restoring the natural undulations that exist on the green. They developed a golf practice device that gave the impression of being on the green in terms of shape and feel on the soles of the feet, but subsequent experiments revealed the following problems: discovered. That is, as shown in FIG. 8, an air cylinder e was used to move the expanded metal d that constitutes the movable floor up and down, and the tip of the piston rod f was connected to the expanded metal d. The connection between the piston rod f and the expanded metal d is, so to speak, at a point, and as a result, no matter how expanded the metal is, when it is partially raised by the operation of the air cylinder e, the raised state forms an appropriate curved surface. not have a conical shape, and the piston rod f and the expanded metal d.
Due to the small contact area with the metal, local bending stress was generated, and as this process was repeated, cracks occurred in the expanded metal d. In addition, the expanded metal was supposed to be fixedly connected to the machine frame with bolts at its side edges, but when attempting to connect with bolts in this way, the bolt pitch and the mesh pitch of the expanded metal d do not necessarily match. They do not match and misalignment occurs, and as a result, in order to allow the bolt to pass through, a part of the expanded metal d (if expanded metal is likened to a net, the net leg or joint part) must be cut out, or the bolt must be bypassed. Such deformation processing had to be performed in advance, which was extremely complicated and was also a factor in deteriorating the function of the expanded metal.

<Means for Solving the Problems> Therefore, in order to solve the above-mentioned problems, the golf practice device according to the present invention is a golf practice device in which artificial turf is arranged on the upper surface of a movable floor that partially moves up and down. , the movable floor is formed of expanded metal, the side edges of the expanded metal are freely movable from above and below, and a lifting device for moving the movable floor up and down has a relatively large area on the lower surface of the expanded metal. A circular curved plate is disposed in contact with the curved plate, and a part of the expanded metal located on the upper surface of the curved plate is cut out to eliminate or minimize bending stress caused by vertical movement of the expanded metal, In addition, by clamping the expanded metal instead of fixing it with bolts, there is no need to consider the bolt pitch and the mesh pitch of the expanded metal, and the deformation caused by the vertical movement of the movable floor due to the cylinder can be suppressed. The face plate provides a smooth curved surface.

<Example> Next, an example of the golf practice device according to this invention will be described based on the drawings, of which Figure 1 is a partially cutaway perspective view. 2 is a rubber sheet placed on the bottom surface. Further, 3 is a movable floor disposed below the movable floor, and 4 is a fixed floor. The artificial turf 1, the rubber sheet 2, and the movable floor 3 are each bonded and connected by a desired means such as adhesive or Velcro fasteners, and the movable floor 3 is shown in FIG. It is made of expanded metal as shown. As shown in the diagram, expanded metal is an elastic material formed with continuous diamond-shaped cells, and is a material that can expand and contract in the vertical and horizontal directions. Other shapes may be used as long as they fall within this category. Furthermore, the movable floor 3 and the fixed floor 4 are both arranged on a frame 5 formed under these floors. and the others may be fixed beds 4. As a means for arranging the expanded metal constituting the movable floor 3, as shown in FIG. The holding body 6 is arranged so that the side edges of the expanded metal are held in a floating state from above and below. In this case, the above-mentioned holding body 6 is
Although it may be formed integrally, it also includes one that is constructed using several parts and as a result forms a substantially U-shape. The movable floor 3 is movable up and down, and its configuration is as shown in FIG. 4. That is, in the same figure, 7 is an air cylinder (other than hydraulic cylinders, electric jacks, etc., in short, the type is not particularly important as long as it is an elevating device. The same applies hereinafter), and the tip of the piston rod 8 of this air cylinder 7 are connected and fixed to the center of the movable floor 3 by screws from above the rubber sheet 2. Reference numeral 9 denotes a circular curved plate disposed on the piston rod 8 of the air cylinder 7, and this curved plate 9 is disposed in contact with the lower surface of the movable floor 3 made of expanded metal over a relatively wide area. In addition, the upper surface has a curved shape. Further, the expanded metal at the position relative to the curved plate 9 is cut out 10 as shown in FIG. 5 to the extent that the expanded metal does not separate from the curved plate 9 even if it moves up and down. This eliminates or reduces the bending stress caused by vertical movement of the expanded metal. A piston is disposed at the other end of the piston rod 8, and a magnet is fitted into a circumferential groove formed on the periphery of the piston. And 11 is air cylinder 7
These sensors are arranged at appropriate intervals on the outer periphery of the movable bed for elevating and lowering the movable bed, and have the function of detecting the position of the magnet and detecting the extended position of the piston rod 8, that is, the height of the movable bed 3.

Figure 6 shows the structure of the cup device.
In the figure, reference numeral 12 is a circular cup with a hole formed in a part of the movable floor 3, and reference numeral 13 is a cup lid for opening and closing the cup 12. This cup lid 13
The rubber sheet 2 and the artificial grass 1 are laminated and bonded in this order to the upper surface of the substrate 14, and this cup lid 13
is connected to the tip of the piston rod 8' of the air cylinder 7' located below. A plurality of the cup 12, cup lid 13, etc. are arranged at different positions, and one of them is used depending on the purpose. In addition, 15 in the figure
1 is a ball recovery chute, which is used to recover out-of-burns (OB) balls, 16 is an air compressor, 17 is an operation panel, and 18 is a club rack.

<Function> First, let us talk about the vertical movement of the movable bed 3. When air is sent below the piston of the air cylinder 7, the piston is pressed and the piston rod 8 rises. rises from the part connected to,
The rubber sheet 2 and artificial grass 1 present on the upper surface also rise. In this case, the movable floor 3 is made of expanded metal, and this expanded metal is raised by the curved plate 9, so that when raised, the raised state forms a gentle curved surface. It will become. Conversely, the movable floor 3 can be lowered by operating the air cylinder 7 in the opposite direction. This movable floor 3 may be one piece that covers the entire surface of the golf practice device, but if it is divided into multiple pieces and connected together, it is possible to form a continuous curved surface as a whole, and the green It is possible to form an undulation that is infinitely close to . Furthermore, in any of the above cases, the vertical movement of the piston rod 8 is not limited to two types of upper and lower limits, but is stopped at several intermediate points due to the action of the magnet provided on the piston and the movable floor lifting/lowering positioning sensor 11. You can also do it. In addition, by operating the air cylinder 7 in this way, the expanded metal constituting the movable floor 3 is partially moved up and down. The portion will reciprocate slightly along the clamping body 6. In other words, since this expanded metal moves freely within the range of the holding body 6, no strong tension is applied to the expanded metal.

Further, the cup lid 13 can be opened and closed by operating the air cylinder 7'. That is, when the piston rod 8' is lowered by operating the air cylinder 7', the cup lid 13 is lowered and the cup 12 is opened, and when the cup lid 13 is raised by the air cylinder 7', the cup 12 is closed. be.

Of course, the above action can be performed by operating each air cylinder 7, 7' individually, but it is possible to perform the above action by operating each air cylinder 7, 7' individually, but it is possible to perform the above action by operating a single air compressor 16 and a solenoid valve connected to each air cylinder 7, 7'. The cup lid 13 can be operated sequentially by a combination of
By computer-controlled opening and closing, an endless variety of combinations can be created. That is, the height of the vertical movement of the piston rod 8 in the air cylinder 7 is detected by the sensor 11 for positioning the movable floor elevation, and the opening and closing of the cup lid 13 is detected by the sensor for confirming the elevation and descent of the cup lid. This makes it possible to form various undulations under computer control.

<Effects of the invention> As described above, according to the golf practice device according to the invention, in the golf practice device in which artificial turf is arranged on the upper surface of a movable floor that partially moves up and down, the movable floor is formed of expanded metal. At the same time, a circular curved plate that contacts the lower surface of the expanded metal over a relatively wide area is installed in the lifting device for freely holding the side edges of the expanded metal from above and below and moving the movable floor up and down. In addition, since a part of the expanded metal located on the upper surface of the curved plate is cut out, the bending stress caused by vertical movement of the expanded metal is eliminated or becomes very small, and the method of fixing the expanded metal with bolts is also improved. There is no need to consider bolt pitch and mesh pitch of expanded metal at all, and the curved board creates a smooth curved surface and ridge lines appear on the surface of the artificial turf. It is designed to restore the natural undulations that exist on the green, and has the effect of providing a sense of realism on the actual green in terms of shape and feel to the soles of the feet. be.

[Brief explanation of the drawing]

The drawings show an embodiment of the golf practice device according to this invention, and FIG. 1 is a partially cutaway perspective view, FIG. 2 is a plan view with the artificial grass and rubber sheet partially removed, and FIG. Figure 3 is a sectional view showing the sandwiched state of the side edges of the movable floor, Figure 4 A is a sectional view showing the relationship between the curved plate, the movable floor, and the air cylinder, Figure B is a plan view of the curved plate, and Figure 5 6 is a sectional view of the cup device, FIG. 7 is a perspective view of the conventional example, and FIG. 8 is a sectional view of the conventional example. 1...Artificial grass, 2...Rubber sheet, 3...Movable floor, 4...Fixed floor, 5...Frame, 6...Holder, 7, 7'...Air cylinder, 8, 8'...
Piston rod, 9...Curved plate, 10...Removed portion, 11...Sensor for positioning movable floor elevation, 1
2...cup, 13...cup lid, 14...board, 15...ball collection chute, 16...air compressor, 17...operation panel, 18...club rack.

Claims (1)

[Scope of utility model registration request] In a golf practice device in which artificial turf is arranged on the upper surface of a movable floor that partially moves up and down, the movable floor is formed of expanded metal, and the side edges of the expanded metal are sandwiched from above and below so as to be freely movable, In addition, a circular curved plate that abuts a relatively wide area on the lower surface of the expanded metal is disposed in the lifting device for moving the movable floor up and down, and a part of the expanded metal located on the upper surface of the curved plate is cut away. A golf practice device characterized by: