JPH065661U - Golf practice table - Google Patents

Abstract

(57) [Summary] [Purpose] In a golf practice table where the platform can be tilted with a pantograph type jack to practice golf with the tip of the toe rising, play caused by vertical movement of the pantograph type jack. The purpose is to prevent. A pantograph type jack 7 is arranged at each of four diagonal corners of a lower plate 2, and inner arms 11 and 14 of these jacks are provided on outer side arms 12 and 13 of the same length.
While making it shorter, the operating portion 15 of the jack 7 is moved up and down by drawing an arc that curves inward, and the hinge member 3 forming a tilting fulcrum that can be engaged and disengaged is provided between the jacks 7. [Effect] In the jack 7, the operating portion 15 moves on an arc centered on the opposite side hinge member 3, and a smooth tilting movement can be performed without rattling, and the jack 7 can be stably held in any posture.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a golf practice table, and more particularly to a golf practice table that allows a golf practitioner to practice in various inclined states.

[0002]

[Prior art]

 This type of conventional golf practice table tilts the platform on which the golf practitioner rides forward or backward or left and right, and artificially creates various tilt states to enable practice on a sloped surface. Various proposals have been made from large-scale objects using jacks to relatively simple structures using pantograph-type jacks, but basically one side of the platform is raised and lowered while tilting to the other side. This is done by setting a fulcrum.

When a hydraulic jack is used as the lifting device, the working end side of the hydraulic jack moves smoothly in an arc centered around the tilting fulcrum of the tilting table, so that the bearing part forming the tilting fulcrum is biased. Wear is less likely to occur, and the table itself is stably held in an inclined posture without rattling.

However, when a pantograph-type jack is used as the lifting device, its working end does not form an arc centered on the tilt fulcrum of the table unlike the case of a hydraulic jack, and ascends and descends vertically, the tilt fulcrum of the table Twisting occurs in the bearing that makes up the bearing, and this causes rattling in the bearing, which causes the table to be supported not only in a tilted position but also in a flat position. . Especially on the golf practice table, the golf swing is practiced on the table. Therefore, even if there is some play on the table, the practitioner becomes anxious and cannot practice with peace of mind.

[0005]

[Problems to be solved by the device]

 The problem to be solved by the present invention is the occurrence of backlash in the bearing portion that forms the tilt fulcrum when a pantograph-type jack is used as a lifting device for tilting the table on which the practitioner rests.

An object of the present invention is to solve the above conventional problems and to provide a golf practice table that can stably maintain the table in any posture without play.

[0007]

[Means for Solving the Problems]

 The golf practice table which realizes the object of the present invention is designed so that the operating point of the pantograph type jack for tilt driving of the table on which the golf practitioner is placed can be moved according to the track on an arc centered on the tilt fulcrum of the table. It was done.

[0008]

[Action]

 Therefore, when the platform is tilted by the improved pantograph-type jack described above, stress is only applied to the tilt fulcrum only by the load, and the hinge member forming the tilt fulcrum is free from rattling. In any posture, the table can be stably held without rattling.

[0009]

【Example】

 1 to 5 show an embodiment of a golf practice table according to the present invention.

Reference numeral 1 is an upper plate formed in a rectangular shape for tilting for a practitioner to mount, and 2 is a lower plate that forms a base. The upper plate 1 and the lower plate 2 form a practice table body. There is.

Since the upper plate 1 is capable of tilting in a total of four directions in the front-rear direction and the left-right direction with respect to the lower plate 2 (so-called front-down, front-up, toe-up, toe-down), these four directions are possible. A pair of hinge members 3 serving as fulcrums for tilting are provided on each of the four sides of the practice table body. Of the hinge members 3 provided on the four sides of the practice table body, when the upper plate 1 is tilted, only the hinge member on the lower end side of the tilt functions as a hinge, and the hinge members that can be placed on the other three sides are hinges. It is required that it does not function as such and does not hinder the tilting of the upper plate 1.

As shown in FIG. 5, the hinge member 3 in the present embodiment has a receiving body 5 having a V-shaped concave portion 4 formed on the upper portion and fixed to the lower plate 2, and a concave portion 4 of the receiving body 5. When engaging the upper plate 1 with the engaging projections 6 fixed to the lower surface of the upper plate 1 and engaging in the vertical direction, the upper plate 1 is tilted, for example, as shown in FIG. 2, the supporting member 3-1 shown in FIG. 2 serves as a tilt fulcrum, the other supporting members are disengaged, and the receiving body 5 and the engaging projection 6 are separated vertically. Therefore, in order to incline the toe up from the state of descending to the front in FIG. 1, first return to the horizontal state shown in FIG. 4 and raise the right side of the upper plate 1 to raise the hinge member 3-on the opposite side. 2 becomes the fulcrum of tilting, and the engagement of the hinge members on the other three sides is naturally released.

In the lifting device for tilting the upper plate 1, pantograph type jacks 7 shown in FIG. 3 and the like are arranged at four corners of the lower plate 2 radially from the center of the lower plate 2. In the jack 7, the screw rod 10 is rotated by a motor 9 with a speed reducer supported by a balance spring 8 to tilt the arms 11, 12, 13, and 14 of the four-bar linkage structure so that the working portion 15 at the upper end is rotated. However, the two upper and lower inner arms 11 and 14 are made to move more than the other two outer arms 12 and 13 (these arms 12 and 13 are formed to have the same length). Formed short.

Therefore, when the screw rod 10 is rotated in the ascending direction, the actuating portion 15 does not vertically ascend, but ascends while drawing a constant arcuate trajectory that bends inward as determined by the length ratio of the arms. Will be done. Therefore, if the arc is determined so that the straight line connecting the fulcrum of tilting and one point of the operating portion 15 is the radius, the hinge member 3 forming the fulcrum of tilting is engaged with the recess 4 of the receiving body 5 by the engaging projection 6 Will engage without twisting. In the present embodiment, the ball portion 16 of the ball joint is attached to the portion forming the arcuate locus of the operating portion 15, and the bearing portion 17 of the ball portion 16 is attached to the lower surface of the upper plate 1 to adjust the inclination angle of the upper plate 1. The upper plate 1 can always be smoothly moved up and down by always drawing a predetermined trajectory regardless of the condition.

Further, the threaded rod 10 has a right-handed screw portion 10R and a left-handed screw portion 10L formed in halves to prevent the screw portion from moving to one side when moving upward, and the motor 9 does not move in the axial direction. The runout of the motor 9 due to the reaction force at the time of starting the motor is removed by the balance spring 8.

In the golf practice table according to the present embodiment having the above-mentioned structure, the upper plate 1 can be tilted in the above-mentioned four directions by drivingly controlling the four jacks 7 in a predetermined combination. 2, when the jacks 7-1 and 7-2 are driven in the ascending direction, the hinge member 3-3 serves as a tilting fulcrum, and the upper plate 1 is brought to the forward ascending state. On the contrary, when the jacks 7-3 and 7-4 are driven in the ascending direction, the hinge member 3-4 serves as the tilt fulcrum and the upper plate 1 comes to the front lowering state. Further, when the jacks 7-2 and 7-3 are driven in the ascending direction, the hinge member 3-2 serves as a tilt fulcrum and the upper plate 1 is in a state where the tip of the toe is raised, and conversely the jacks 7-1 and 7-4 are moved. When driven in the ascending direction, the hinge member 3-1 serves as a tilt fulcrum and the upper plate 1 is in a state where the toes are lowered.

In the present embodiment, when the upper plate 1 is tilted downward with the two jacks used for tilting drive, for example, the jacks 7-1 and 7-4, the other jacks 7-2 and 7-4 are The straight line connecting the fulcrums of the ball joint for connecting with the plate 1 and the fulcrum axis of the pair of hinge members 3-1 forming the supporting means on the lower inclined side of the upper plate 1 in this case are aligned. Therefore, as shown in FIG. 3, by simply moving the ball joints of the jacks 7-2 and 7-4 freely according to the inclination of the upper plate 1, these jacks can be moved in accordance with the inclination motion of the upper plate 1. It does not require the action of raising. In order to make this possible for the other three inclined postures, in the present embodiment, as shown in FIG. 2, the ball joints of the four jacks 7-1, 7-2, 7-3, 7-4 are provided. Fulcrums are arranged at the four corners of a square, and a pair of hinge members 3 are arranged between them.

The driving of these jacks 7 is carried out steplessly, and by stopping the energization of the motor at a tilt angle desired by the practitioner, the upper plate 1 is tilted unless the motor is rotated in the reverse direction. However, since the motor has a built-in braking mechanism, the upper plate 1 can be held more securely.

Further, since it is dangerous when the inclination angle of the upper plate 1 becomes large, for example, by providing a limit switch 20 having a nut member 10a screwed with the screw rod 10 of the jack 7 as a switch actuating body, a predetermined switch 20 is provided. Motor energization can be automatically stopped at the tilt angle. Of course, it is also possible to stop the energization of the motor at a predetermined inclination angle by another method such as an inclination sensor. Further, if a linear position sensor using sliding resistance or the like is attached between the nut members 10a and 10b of the jack 7, if a desired inclination angle is set, the position information from this position sensor is used. It can be automatically tilted to that angle.

Such a motor control can be performed, for example, by attaching an operation panel 23 to a corner of the upper plate 1. In this case, a practitioner can operate this operation panel with a golf club or the like, and the tilts are gradually separated. It is free from the inconvenience of setting the angle.

On the other hand, the upper plate 1 can produce inclinations only on the above-mentioned four kinds of inclined surfaces, but in reality, for example, it has to be hit with a combined inclined surface of the front descending and the toe descending inclined surfaces. Sometimes. In this case, the upper plate 1 cannot be tilted in conformity with this complex slope only by combining the four jacks 7. However, this is the case where the practice table body is fixedly installed in a fixed direction, and as shown in FIG. 2, a free wheel 18 is provided on each side of the lower plate 2 so that the practice table body can be set to an arbitrary position. By rotating in the direction, it becomes possible to create the above-mentioned compound slope. At that time, the own vehicle 18 can be moved up and down with respect to the lower plate 2 by means of a link mechanism or the like, and the practice table body can be fixed by retracting the free wheel into the lower plate 2 at a predetermined turning position. .

When installed in a golf driving range or the like, a bellows type cover may be provided between the upper plate 1 and the lower plate 2 to cover the inside and prevent a golf ball or the like from entering. It is desirable that a cushion rubber 20 is attached to the upper surface of the upper plate 1 and a combing 21 is provided around the cushion rubber 20 to prevent the golf ball from falling due to the inclination of the planting plate. Further, the ball cage 22 is fixed so as not to slip off. It is desirable to keep it.

[0023]

[Effect of device]

 As described above, according to the present invention, the upper plate on which the golf practitioner rests can be smoothly tilted, and when the conventional pantograph-type jack is used as a lifting device, the jack moves vertically up and down. As a result, the twisting fulcrum portion is not twisted and the upper plate can be stably held in any posture without backlash.

[Brief description of drawings]

FIG. 1 is an external perspective view showing an embodiment of a golf practice table according to the present invention.

FIG. 2 is a plan view showing a state where the upper plate of FIG. 1 is removed.

FIG. 3 is a side view of FIG.

FIG. 4 is a side view of the golf practice table shown in FIG. 1 in a flat posture.

FIG. 5 is a side view of a hinge member.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Upper plate 11-14 ... Arm 2 ... Lower plate 15 ... Operating part 3 ... Hinge member 16 ... Ball part 4 ... Recessed part 17 ... Bearing part 5 ... Receiving body 18 ... Free wheel 6 ... Engagement protrusion 20 ... Cushion rubber 7 … Jack 21… Combing 8… Balance spring 22… Ball basket 9… Motor 23… Operation panel 10… Screw rod

Claims (3)

[Scope of utility model registration request] 1. A golf practice table comprising the following practice table body A, a hinge mechanism B, and a lifting device C. Exercise table main body A (1) Having an upper plate and a lower plate that are vertically separated from each other Hinge mechanism B (1) Opposing in the front-rear direction that forms a fulcrum of tilting of the upper plate with respect to the lower plate in the front-rear direction. A front-rear direction hinge member provided and a left-right direction hinge member provided facing each other in the left-right direction forming a fulcrum of tilting in the left-right direction.
The hinge members are composed of a concave portion that engages and disengages in the vertical direction and an engaging portion that engages with the concave portion. Lifting device C (1) Radial from a substantially central position between the lower plate and the upper plate. The pantograph type electric jacks should be arranged at four places with appropriate intervals on the upper and lower sides. (2) In these pantograph type electric jacks, the upper and lower ends of the pantograph type electric jacks are attached to the upper plate through universal bearings, and the base part is the Be attached to a board (3) In these pantograph-type electric jacks, the length of the link members facing each other is shorter than the length of the outer link members. The practice table body A, the hinge mechanism B, and the lifting device described above. Composed of C. 2. The golf practice table according to claim 1, wherein the universal bearing forming the operation fulcrum of the pantograph type jack is arranged on the same axis as the fulcrum of the hinge member. 3. The golf practice table according to claim 1, wherein the practice table main body is provided with wheels capable of moving up and down on a lower plate thereof.