JP2006307916A - Horizontal movement device and base isolation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a horizontal movement device and a base isolation device of small number of components using a guide and a stopper in common and using small size balls and ball grooves. <P>SOLUTION: An upper side and a lower side plates have three or more groups of horizontal movement parts 41 which consists of ball grooves 4, 5 arranged above and below the balls 40. Guide grooves 102, 103 having T-shape cross section are provided on one of those and guides 101, 104 fitting to the guide groove are provided on another of those, contact of a bottom 109 of the guide groove and a tip part 108 of a guide is prevented at a center part C position. A bottom stepped part 111 of the guide groove and a tip stepped part 110 of the guide are made contact each other at a position to be ball groove ends 45a, 55a not to lift the balls. Depth of the ball groove gets gradually deeper as it separates from the both end part and gets deepest at a center part. Crossing angles θ are given to the ball grooves, and a bisector of the crossing angle and directions of the guide are made consistent. A horizontal movement member is arranged to make each guide (movement direction) crosse an upper part and a lower part of the intermediate member 124 at right angle respectively. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  Horizontal movement devices that move the loaded parts, as well as items such as computer servers, arts and crafts, and large items, buildings, etc., are protected from vibrations and vibrations, especially using balls and ball grooves. The present invention relates to an improvement in preventing a ball from jumping out at a ball groove end of a ball groove type horizontal movement device or a seismic isolation device.

An example of a horizontal movement device that enables horizontal movement by using a ball and a ball groove is a seismic isolation device. In such a seismic isolation device, in Patent Document 1, a base-isolated part in which a ball is movably interposed between linearly extending ball grooves arranged opposite to each other is used as a common intermediate plate (member). The grooves are arranged above and below the intermediate plate so that the direction of the grooves is a right angle. As a result, for example, the upper seismic isolation component can be rolled and moved in the X-axis direction, and the lower seismic isolation component can be rolled and moved in the Y-axis direction. Further, by increasing the depth of the central portion of the ball groove, the ball is automatically returned to the central position. In order to prevent the ball from jumping out at the end of the ball groove, the depth of the ball groove is increased to such an extent that the upper and lower plates do not come into contact with each other, or a stopper is provided at the end of the ball groove. Further, a guide is provided so that the upper and lower grooves do not rotate with each other. On the other hand, it is necessary to attenuate the shaking by a brake or the like in addition to the restoring force against the shaking of the earthquake. Therefore, an attenuation plate is provided on the intermediate plate to press the side surfaces of the upper plate and the lower plate to attenuate the oscillation.
JP 2001-173268 A

  However, in the thing of patent document 1, there existed a problem that a guide and a stopper were another structures and there were many number of parts. In addition, it is necessary to deepen the ball groove, and there is a problem that the height (thickness) of the component increases. Furthermore, since the damping plate pushes the side surface of the other side that relatively moves the attenuation against the earthquake, a constant frictional force can be given. However, there is a problem that a damping mechanism has to be provided in the longitudinal direction and the structure becomes complicated and adjustment is difficult. In addition, since the frictional force is controlled, there is a problem that when it is desired to obtain a frictional force proportional to the applied load amount, the frictional force must be adjusted each time according to the applied load amount.

  In view of the above-described problems, an object of the present invention is to share a guide and a stopper, reduce the number of parts, reduce the thickness, and reduce the size. Furthermore, it is providing the horizontal displacement apparatus and seismic isolation apparatus which can obtain a desired frictional force, without using a damping board etc.

  In the present invention, the upper guide portion having a ball groove provided in a linear shape extending in both longitudinal directions from the center portion on the lower surface side, and a ball provided in a linear shape extending in both longitudinal directions from the center portion on the upper surface side. A lower guide portion provided with a groove, and a ball fitted to the ball groove of the upper guide portion and the ball groove of the lower guide portion, and provided so as to be able to slide or roll between the both ball grooves. Horizontal moving parts, at least three or more sets of the horizontal moving parts, an upper plate provided with all the upper guiding parts of the horizontal moving parts, and a lower plate provided with all the lower guiding parts of the horizontal moving parts A horizontal movement device or a seismic isolation device having a side plate, the guide groove having a T-shaped cross section extending in a uniaxial direction formed on either the lower surface of the upper plate or the upper surface of the lower plate; T-shaped guide groove A guide formed in a plate opposite to the formed side, extending in the same direction as the guide groove and projecting in a slidable manner in the guide groove, and having a T-shaped cross section. A position where the bottom plate of the T-shaped guide groove and the tip end portion of the T-shaped guide are not in contact with each other at the center position of the plate and the lower plate, A moving device configured to be movable in a uniaxial direction so that the bottom step portion of the T-shaped guide groove and the tip step portion of the T-shaped guide are in contact with each other so that the ball does not float above the ball groove at a position beyond The problem mentioned above was solved by providing a seismic isolation device.

  That is, by arranging at least three horizontal moving parts with balls interposed between the upper and lower ball grooves, it is possible to prevent a horizontal inclination or the like of the upper plate with respect to the lower plate and to stabilize the horizontal moving device or the seismic isolation device. it can. Furthermore, a guide groove having a T-shaped cross section extending in a uniaxial direction between the opposing upper and lower plates and a guide can be slidably fitted to each other to be guided in a uniaxial direction. Furthermore, the upper plate and the lower plate are positioned at the center, so that the bottom of the T-shaped guide groove and the tip of the T-shaped guide are not in contact with each other. It is only intended to serve as a guide. Further, at the position where the upper plate and the lower plate are at or beyond the end of the ball groove, the bottom step portion of the T-shaped guide groove and the tip step portion of the T-shaped guide are in contact with each other so that the ball does not rise from the ball groove. Therefore, even if the upper plate and the lower plate are opened, the guide groove and the stepped portion of the guide are caught and do not open any further, so that the ball does not fall out or jump out of the ball groove. The moving direction of the horizontally moving component can be moved in the same direction as the guide groove and the sliding direction of the guide or in a restricted direction.

  When used in seismic isolation devices, it is preferable to have an automatic return function. Therefore, in the invention of claim 2, the depth of the bottom part of at least one of the opposing ball grooves gradually increases from both ends, and the depth of the bottom part of the central part is maximized. The horizontal moving device or seismic isolation device. In addition, if the deepest part is set to a part other than the center part, the position can be set as a position for automatic return, so the range of use for the horizontal movement device is widened.

  Furthermore, in the invention of claim 3, at least one set of the ball grooves arranged so as to face each other through the balls has an intersection angle of more than 0 ° and less than 90 ° when viewed from the vertical direction. In addition, a horizontal movement device or a seismic isolation device in which the bisector of the crossing angle is set in the same direction as the movement direction of the T-shaped guide groove and the T-shaped guide is used.

  That is, when the ball grooves are crossed with each other and moved along the guide in the bisector of the crossing angle, a friction coefficient substantially proportional to the crossing angle is obtained. Thereby, even if it does not provide an attenuation function outside, it provides a seismic isolation part with an attenuation function using a ball groove and a ball. When the longitudinal direction of the ball groove, the guide groove and the guide is the same direction, the crossing angle becomes 0 degree, pure rolling, the upper and lower ball grooves face each other in parallel, and the ball easily rolls between the upper and lower guide ball grooves. To do. The friction coefficient at this time is a rolling resistance with extremely low friction of about 0.001 to 0.002. On the other hand, if one of the ball grooves is at a right angle and the crossing angle is 90 degrees, the ball rolls along one of the ball grooves, and the other ball groove slides and rotates in a direction perpendicular to the ball groove. In this case, the friction coefficient between the ball and the upper and lower ball grooves is the friction coefficient on the side where the ball rolls and rotates when the ball rolls along one groove. It becomes about 0.20. The value of the friction coefficient is determined by the material of the ball or ball groove, surface hardness, surface treatment, lubricating oil, shape, and the like.

  If this crossing angle is changed between 90 degrees and 0 degrees, and the upper and lower ball grooves are moved relative to each other via the ball, the slip between the ball and the ball groove decreases as the crossing angle decreases, and rolling occurs. As it increases, the coefficient of friction gradually decreases. The friction coefficient with respect to the crossing angle is pure rolling at the above-described crossing angle of 0 degrees, and the friction coefficient is the lowest, and the crossing angle is the largest at 90 degrees. Thereby, the friction coefficient between the ball and the ball groove can be changed by changing the crossing angle from 0 degree to 90 degrees. Therefore, an arbitrary friction coefficient can be obtained by appropriately determining the crossing angle. In addition, since the combined friction of the roller sliding surface with respect to the ball and the ball groove that directly receives the loaded load becomes a damping mechanism of a constant friction coefficient type.

  More specifically, as shown in FIG. 1, the horizontally moving component 1 is provided with an upper guide portion 2 having a ball groove 4 provided in a straight line on the lower surface side (shown by a dotted line). Further, a lower guide portion 3 having a ball groove 5 provided linearly on the upper surface 3 b side is fixed to a base (a part of the lower plate) 13. A guide (not shown) is provided, and the upper guide portion 2 and the lower guide portion 3 are regulated so as to always have an intersection angle θ. Between the upper and lower ball grooves 4 and 5, there is provided a ball 6 which is fitted in both ball grooves and is slidable or rollable between both ball grooves. The vertical cross section of the ball groove (not shown) is such that the bottom portion is deepest at the centers 2c and 3c, and the ball is stable at the positions of the center positions 2c and 3c of the respective ball grooves.

  In such a configuration, when the upper guide portion 2 is moved relative to the lower guide portion 3, the crossing angle θ is always regulated to be constant, so that the ball 6 is placed at the center 3c of the lower ball groove 5 as shown in FIG. In some cases, the upper guide portion can move only in the direction of the upper ball groove 4 and can move only in the range indicated by the arrow A. Similarly, when the ball 6 is in the upper right end 5r as viewed in the lower ball groove 5, the range similarly indicated by the arrow B, and when the ball is in the lower left end 5s as viewed in the lower ball groove, the same applies. Since only the range indicated by the arrow C can move, the upper guide portion 2 eventually moves within the range surrounded by the two-dot chain line 10. That is, the lower guide portion 3 and the upper guide portion 2 can be relatively horizontally moved within a range surrounded by a two-dot chain line 10. The longest moving distance is the maximum moving distance L in the bisector direction of the intersection angle, and the minimum moving distance S in the perpendicular direction.

  The friction coefficient of the horizontally moving component 1 composed of the opposing linear ball grooves will be described. For example, the friction coefficient at the time of movement of the upper guide portion 2 indicated by an arrow A is rolling and sliding friction between the ball 6 and the upper ball groove 4 and sliding friction between the ball and the lower ball groove 5. Slip is 0 when the ball 6 moves along the ball grooves 4 and 5, and becomes maximum when the ball rotates at right angles to the ball grooves, and the slip decreases as the crossing angle θ of the ball grooves decreases. Therefore, the friction coefficient for each crossing angle θ was measured. The result is shown in FIG. The ball material is SUJ2 (bearing steel), and the upper and lower guides are the same. The material is a tempered material of S45C, and the ball groove has a gothic arch cross section with a radius of 52% of the ball diameter and a tolerance angle of 50 °. And the groove depth is about 40% of the ball diameter. In addition, four sets of horizontally moving parts were equally arranged at the four corners for stabilization and measured.

  As shown in FIG. 3, when the crossing angle θ = 90 degrees, 0.15 which is the friction coefficient due to the same slip as in the conventional case is shown, and at the crossing angle θ = 0, the conventional ball grooves are arranged in parallel and become pure rolling. The friction coefficient is about 0.001 to 0.002. When the crossing angle is greater than 0 ° and less than 90 °, the crossing angle θ = 30 °, the friction coefficient is 0.05, θ = 45 ° is 0.07, θ = 60 ° is 0.1, θ = 75 The friction coefficient is 0.12, and the friction coefficient is substantially equal to the value obtained by connecting the intersection angle 90 degrees and the intersection angle 0 degrees with the straight line F. Thus, it can be seen that the friction coefficient changes according to the crossing angle of the linear ball grooves, that is, the desired friction coefficient can be easily obtained by changing the crossing angle. In addition, when a higher friction coefficient is required, the friction coefficient may be increased by selecting the above-described surface treatment or material. When used as a seismic isolation device, the friction coefficient is preferably 0.03 to 0.08 (the crossing angle is approximately θ = 10 to 60 degrees, more preferably θ = 15 to 45 degrees). Thus, an appropriate friction coefficient can be easily obtained by appropriately selecting the crossing angle of the linear ball grooves.

  The ball groove may be straight and the crossing angle may be constant at all times, but the crossing angle may be changed halfway by bending the ball groove or drawing an arc. If the crossing angle is gradually increased, the friction coefficient is increased at the ball end to increase the braking performance, and the impact of the ball at the ball end, the impact between the guide groove and the stepped portion of the guide can be reduced.

  In the above-described horizontal movement device or seismic isolation device, the upper plate and the lower plate are relatively movable along one axis by a T-shaped guide groove and guide. Therefore, in a single horizontal movement device or seismic isolation device, the movement direction is only uniaxial. However, I want to move the XY axes in the horizontal direction by adding one more axis. Therefore, in the invention according to claim 4, the horizontal moving device or the seismic isolation device is formed as a first moving part by arranging the upper or lower plate of the horizontal moving device or the seismic isolation device above the intermediate member. An upper or lower plate is disposed below the intermediate member to form a second moving part, and the first moving part and the moving direction of the second moving part are arranged to be perpendicular to each other. The horizontal moving device or seismic isolation device.

  That is, according to the invention described in claim 4, with the intermediate member in between, the horizontal movement device or the seismic isolation device that is movable in the uniaxial direction is arranged vertically as the first and second moving parts, Since the moving direction, that is, the guide groove and the axial direction of the guide are arranged so as to be orthogonal to each other above and below the intermediate member, the movable range of the first and second moving parts complement each other, and the upper side of the first moving part The plate and the lower plate of the second moving part can be moved relative to each other in two directions of the X axis and the Y axis. This enables two-dimensional swing in the horizontal direction. Therefore, for example, if the upper plate of the first moving part is the loading side and the lower plate of the second moving part is the fixed side, the horizontal moving device that supports the fixed side and the loading side so as to be swingable in the horizontal direction. Or it can be a seismic isolation device.

  According to the horizontal movement device or the seismic isolation device of the present invention, a ball is interposed between the upper and lower ball grooves, and the guide groove and the guide having a T-shaped cross section extending in a uniaxial direction between the lower plate and the upper plate can slide with each other. As a result, the uniaxial guide and the ball jump-out prevention function are combined, so the number of parts is small, the structure is simple, and the size and weight are reduced. Further, the depth of the ball groove can be reduced, and the thickness can be reduced or the height can be reduced.

  In the invention according to claim 2, since the depth of the bottom of the center of the ball groove is made deeper than the both ends, and the natural return is possible after rocking such as an earthquake, a horizontal movement device capable of automatic return Or it can be a seismic isolation device.

  Furthermore, in the invention of claim 3, a crossing angle is given to the ball grooves arranged so as to face each other through the ball, and the bisector of the crossing angle, the T-shaped guide groove and the relative movement axis of the T-shaped guide Since the direction is coaxial, the friction coefficient according to the crossing angle can be obtained by the ball groove and the ball, and the desired frictional force can be obtained without using a conventional damping plate, etc. It became to provide a horizontal movement device and seismic isolation device. If the shape of the ball groove is changed and the crossing angle is changed, the friction coefficient can be changed according to the relative movement position.

  Furthermore, according to the invention described in claim 4, the horizontal movement device or the seismic isolation device is arranged vertically as the first and second moving parts with the intermediate member in between, and the movement direction, that is, the guide groove and the guide Since the axial direction is arranged so as to be perpendicular to each other, the upper plate of the first moving part and the lower plate of the second moving part can be moved relative to each other in the horizontal X and Y directions. It can be a swingable horizontal movement device or seismic isolation device. In addition, since the number of parts is small, small, thin, and low in height, a horizontal moving device or an exemption suitable for various placed articles such as small to large, low to high center of gravity, etc. A seismic device could be provided. Further, since the first and second moving parts can be the same part, the number of parts is small, and management, design, assembly, adjustment, and the like are facilitated.

  An embodiment when the present invention is applied to a seismic isolation device will be described with reference to the drawings. 4A and 4B are schematic views of a horizontal moving part showing the shape of the ball groove of the seismic isolation device of the present invention, wherein FIG. 4A is a plan view of the lower guide portion, FIG. 4B is a bottom view of the upper guide portion, and FIG. Is a plan view of the horizontally moving part at the neutral position of the vertical guide part, (d) is a plan view when the upper guide part is moved laterally (left), and (e) is a further horizontal movement of the upper guide part. 5 is a plan view when the ball is positioned at the end of the ball groove, FIG. 5 is a plan view of the base plate (the lower plate of the second moving part) (a) of the seismic isolation device using the horizontal moving part of FIG. ) A side view, (b) is a side view, (c) is a bottom view, (a) in FIG. 6 is a plane (upper) view of the intermediate plate, and a top view of the lower plate of the first moving part, (B) is a side view, (c) is a bottom view, and a bottom view of the upper plate of the second moving part, (d) is a rear view, and (a) in FIG. 7 is an upper plate (first movement). Flat (top) face view of an upper plate) of goods, (b) is a front view, (c) is a bottom view.

  8A is a perspective view of the seismic isolation device showing the embodiment of the present invention when the ball is in a neutral position, FIG. 8B is a plan view, and FIG. 9A is an intermediate (and upper) plate. Is a perspective view of the seismic isolation device when moved in the lateral (right) direction as seen in the figure, (b) is a plan view, and (a) in FIG. 10 is when the upper plate is moved in the vertical (up) direction as seen in the figure FIG. 11B is a plan view, and FIG. 11A is a plan view of the seismic isolation device when the lower plate moves in the horizontal (right) direction and the upper plate moves in the vertical (upward) direction. A perspective view and (b) are top views. In FIG. 9, the lower surface of the upper plate and the upper surface of the intermediate plate are not described. Further, in FIG. 10, the lower surfaces of the lower plate and the intermediate plate are not described.

  As shown in FIGS. 8 to 11, the seismic isolation device 121 of the present invention has four horizontal moving parts 41 shown in FIG. 4 arranged on the upper side of the intermediate plate (intermediate member) 124 and four sets on the lower side, for a total of eight sets. Is. In this embodiment, the seismic isolation device 121 includes an upper plate (upper plate of the first moving part) 122 on which a server to be seismically isolated and works of art are placed, and a lower plate (fixed to a base such as a fixed floor). The lower plate of the second moving part) 123, the intermediate plate 124 provided with linear ball grooves constituting the horizontal moving part 41 between the upper plate and the lower plate, respectively, and the eight balls 40; It is composed of

  As shown in FIG. 4A, the horizontal moving component 41 is bent on the upper surface 42a of the lower guide portion 42 in the vicinity of the linear portion 44 passing through the center C and the stroke end 44a of the linear portion. The second straight portion 45 is formed on both sides. The straight portion 44 and the second straight portion 45 are made point-symmetric with respect to the center C of the ball groove 43, and the second straight portion extends outward without returning to the center side. Here, the straight line portion 44 is raised to the right so as to have an angle of θ / 2 with respect to the guide direction. Further, as shown in FIG. 4 (b), on the lower surface 52a of the upper guide portion 52 of the horizontal moving part 41, the linear portion 54 of the linear ball groove 53 and the second linear portion 55 are linear in the lower guide portion. The ball groove 43 has the same shape. Further, the depths of the bottom portions of the upper and lower ball grooves 43 and 53 (not shown) are gradually increased from both end portions, and the depth of the bottom portion of the central portion is maximized. The ball groove has a Gothic arch cross section so that the ball can contact at two or more points. 4C to 4E, the lower guide portion 42 side is indicated by a solid line and the upper guide portion 43 side is indicated by a dotted line for the sake of explanation. In addition, in the relative movement of the vertical guide part, since one set of seismic isolation parts tilts, at least three sets of seismic isolation parts are arranged in the same moving direction so as not to tilt. Therefore, only one set will be taken up and explained. Further, the case of moving in the left direction will be described, but the same applies to the case of moving in the right direction.

  As shown in FIG. 4 (c), the lower guide portion 42 is fixed, and the upper guide portion 52 is movable along the guide 30 through the balls 40 to form the linear ball grooves of the upper and lower guide portions 42, 52. They are assembled so as to face each other at the center C. The guide 30 restricts the movement direction of the upper guide portion 52 so that it can move along a certain uniaxial direction in the horizontal direction. Accordingly, the straight portions 44 and 54 intersect with each other at an intersection angle θ, and the movement direction thereof coincides with the bisector direction. That is, it becomes the same state as FIG. 1 mentioned above. For this reason, the ball 40 has a combined friction of rolling and sliding, and moves with a friction coefficient corresponding to the crossing angle θ, so that the linear portions 44 and 54 can obtain a damping action due to large friction.

  Further, when the earthquake shake increases, the ball 40 reaches the second straight portions 45 and 55 as shown in FIG. At this time, the crossing angle θ2 of the ball grooves 43 and 53 is further increased, and a damping action due to a large friction is generated. In the horizontal moving part having such a shape, an appropriate frictional force that is less dependent on the load load can be obtained at the straight part (center side), and the seismic isolation performance is improved. Further, a larger friction is caused at the ball groove ends 45a and 55a side. Can be used to reduce the impact of excessive shaking. The relative movement of the vertical guide portion is possible up to the position shown in FIG.

  Such horizontal moving parts are arranged as follows. First, as shown in FIG. 5, the four corners of the upper surface 123a of the rectangular lower plate 123 (the upper surface 42a of the lower plate 42 shown in FIG. 4 and the upper surface of the lower plate provided with the lower guide portion of the horizontally moving component). The linear ball grooves 43 and 43 'are carved so as to be symmetrical (the horizontal moving parts are integrated with the upper plate, the lower plate and the intermediate plate, respectively). Further, a guide 101 having a T-shaped cross section that can be attached and detached is attached to the central portion with a plurality of bolts 200 in the lateral direction as seen in the figure. The linear ball grooves 43, 43 ′ are formed on both sides with straight portions 44, 44 ′ passing through the center C and second straight portions 45, 45 ′ bent near the stroke end 44 a of the straight portion. The straight portions 44, 44 'and the second straight portions 45, 45' are point-symmetrical with respect to the center C of the ball grooves 43, 43 ', respectively, and the second straight portion is outward without returning to the center side. It extends toward. Here, the linear portions 44 and 44 'are arranged at four positions symmetrically with respect to the guide 101 and the guide vertical axis, and obliquely arranged so as to have an angle of ± θ / 2 with respect to the direction along the guide (longitudinal direction). Has been.

    As shown in FIG. 6 (c), the four corners of the lower surface 124b of the rectangular intermediate plate 124 (the lower surface 52a of the upper plate 52 shown in FIG. 5 and the lower surface of the upper plate provided with the upper guide portion of the horizontal moving part). A linear ball groove 53, 53 'is carved on the surface. In addition, a guide groove 103 having an inverted T-shaped cross section is provided in the center portion in the lateral direction, and the linear ball grooves 53 and 53 ′ are perpendicular to the guide grooves 103 and the guide grooves. Are symmetrically arranged at four positions, and are obliquely arranged at an angle of ± θ / 2 with respect to the direction along the guide groove (longitudinal direction). That is, the linear ball grooves 53 and 53 'on the lower surface 124b of the intermediate plate (the lower surface of the upper plate) are the left and right reversed with respect to FIG. This is because when the upper surface of the lower plate (the upper surface of the lower plate) and the lower surface of the intermediate plate (the lower surface of the upper plate) face each other, the same shapes (43 and 53, 43 'and 53') face each other. It is to make it.

  As shown in FIG. 6A, linear ball grooves 153 and 153 at the four corners of the upper surface 124a of the square intermediate plate 124 (the upper surface 52a of the lower plate 52 and the upper surface of the lower plate shown in FIG. 5 described above). 'Is carved. Further, a guide groove 102 having an inverted T-shaped cross section is provided in the central portion in the vertical direction as viewed in the figure. The shape of the upper surface 124a is obtained by turning the lower surface 124b 180 ° so as to be the upper surface and rotating it 90 ° as it is.

  Further, as shown in FIG. 7C, linear ball grooves 143 are formed at the four corners of the lower surface 122b of the rectangular upper plate 122 (the upper surface 42a of the lower plate 42 and the lower surface of the upper plate shown in FIG. 5). 143 'is carved. Further, a guide 104 having a T-shaped cross section that can be attached and detached is provided in the central portion in the vertical direction as viewed in the figure. The upper plate 122 is exactly the same as the above-described lower plate, but is disposed so as to face the lower plate and is rotated by 90 ° relative to the lower plate. That is, the upper plate is obtained by turning the lower plate by 180 ° and rotating it 90 °. Further, the reference numerals of the linear ball grooves are given different numbers for distinction, but 43 and 143, 43 'and 143', 53 and 153, 53 'and 153' have the same shape, and 143 And 143 'and 153 and 153' are line symmetrical with each other. Accordingly, the lower plate and the intermediate plate, and the intermediate plate and the upper plate are vertically symmetrical if one of them is rotated by 90 °.

  As shown in FIGS. 5 to 7, the widths 105 of the tips of the T-shaped sections of the guides 101 and 104 are slightly smaller than the groove width 106 at the bottom of the guide grooves 102 and 103 and wider than the opening width 107, and are fitted to each other. It is made slidable by combining. In addition, a gap is provided in the vertical direction so that it can move up and down to some extent, but it is prevented from being separated from each other in the vertical direction. Further, the bottom depth of the upper and lower ball grooves 43, 43 ', 53, 53', 143, 143 ', 153, 153' (not shown) gradually increases from both ends, and the depth of the bottom at the center is the largest. It is made to return naturally, and it is made to spread between plates with respect to the motion of a ball | bowl. For this reason, when the ball 40 reaches the ball groove ends 45a and 55a when the ball 40 reaches the ball groove ends 45a and 55a when the ball 40 reaches the ball groove ends 45a and 55a. Are dimensioned so that the bottom step portion 111 of the T-shaped guide groove and the tip end step portion 110 of the guide are in contact with each other and the plate does not spread to the side away from each other.

  As shown in the upper half of FIG. 8A, the seismic isolation part having such a shape is such that first, the intermediate plate is on the floor and the guide 101 is not attached, and the linear ball grooves 43 and 53, 43 'and 53 respectively. The intermediate plate 124, the ball 40, and the lower plate 123 upside down are stacked so that the balls 40 are positioned substantially at the center of the ball groove. In this state, the guide 101 is inserted into the lower plate 123 and the guide groove 102, and the guide is fixed to the lower plate 123 with the bolt 200. In this state, it is turned upside down and arranged as shown in the lower half of FIG. Next, with the guide 104 not attached, the linear ball grooves 143 and 153 and 143 'and 153' are opposed to each other so that the ball 40 is positioned substantially at the center of the ball groove. 124, balls 40, and upper plate 122 are stacked. In this state, the guide 104 is inserted into the upper plate 122 and the guide groove 103, and the guide is fixed to the upper plate 123 with the bolt 200.

  As a result, as shown in FIG. 8, the seismic isolation device 121 is easily assembled, and the balls 40 are respectively inserted between the linear ball grooves 43 and 53, 43 'and 53', 143 and 153, and 143 'and 153'. The four horizontally moving parts are respectively sandwiched between the upper plate (upper plate) 122 and the upper side (lower plate) 124a of the intermediate plate, and the lower plate (lower plate) 123 and the lower side of the intermediate plate. (Upper plate) 124b is formed between the plates 101, 104 and the guide grooves 102, 103 so that the plates 122, 123, 124 can move relative to each other in the horizontal direction.

  In the seismic isolation device 121 having such a configuration, a case where the upper plate 123 is moved in the lateral (right) direction as viewed in FIG. 8 will be described. When the upper plate 122 receives a force to the right, the upper plate and the intermediate plate 124 cannot move due to the upper guide 104 and the guide groove 103 as shown in FIG. Therefore, the upper plate 122 and the intermediate plate 124 move integrally along the lower guide 101 and the guide groove 102 to the right. Moreover, it can move similarly to the left direction. At this time, the linear ball grooves 43 and 53, 43 'and 53'143 and 153, and the straight portions 44 and 54, 44' and 54 'of 143' and 153 'intersect each other at the intersection angle θ, 40 rolls and slides to obtain a predetermined coefficient of friction and a friction force effective against a presumed earthquake shake, and protects the load from the earthquake.

  Further, when receiving a large force, the ball 40 passes the straight portions 44, 54, 44 ', 54' and reaches the second straight portions 45, 55, 45 ', 55'. At this time, the second straight line portion also intersects, and the crossing angle θ2 is larger than θ, and a friction coefficient, a friction coefficient larger than the friction force, and a friction force at the straight line portion can be obtained. Can respond to the shaking of an earthquake. Further, in the case of large shaking, the ball 40 reaches the ball groove ends 45a and 55a. In the case of a larger shake, the stepped portions 110 and 111 of the T-shaped guides 101 and 104 fitted in the T-shaped guide grooves 102 and 103 come into contact with each other, and the ball 40 is sandwiched between the plates. 43 ', 53', 143 and 153, and 143 'and 153' are prevented from jumping out.

  Next, a case where the upper plate 122 is moved in the vertical (upward) direction as viewed in FIG. 8 will be described. When the upper plate 122 receives a force upward, similarly, as shown in FIG. 10, the upper plate 122 moves upward with respect to the intermediate plate 124 along the longitudinal guide 104 and the guide groove 103. . Therefore, the upper plate 122 moves upward. Similarly, it can move downward. The intermediate plate 124 and the lower plate 123 cannot move relative to each other in the vertical direction by the lateral guide 101 and the guide groove 102. The linear portions 44, 54, 44 ', 54' of the linear ball grooves 43, 53, 143, 153, 43 ', 53', 143 ', 153' intersect each other at an intersection angle θ, and have a predetermined friction coefficient, Frictional force can be obtained. Since the operation is the same as that in the lateral direction described above, description thereof is omitted.

  In this way, the upper plate 122 and the lower plate 123 can swing in the direction of 90 degrees with respect to the intermediate plate 124, so that the upper plate 122 and the lower plate 123 are horizontal as shown in FIG. It can be swung in the direction and works effectively as a seismic isolation device against shaking such as an earthquake. Further, the guide groove and the guide having a T-shaped cross section can prevent the uniaxial guide and the ball from jumping out, thereby reducing the size and space. In addition, since the crossing angle θ of the ball grooves can be selected as appropriate and the crossing angle can be changed, not only can the desired coefficient of friction be easily obtained, but it is also possible to cope with earthquakes that are larger than expected and various loads, regions, Can be widely used in places.

  In the embodiment, the upper and lower guides are set as a central set, but two sets on both sides or other forms may be used. Moreover, although the vertical guide part provided with the ball groove was directly processed into the plate, the vertical guide part may be attached to the plate as a separate member. In this embodiment, the case of moving in the biaxial direction has been described. However, if the upper or lower plate and the intermediate plate are combined, a uniaxial moving device or a seismic isolation device is obtained. For example, it can be used for moving or seismic isolation devices such as drawer tables, wall closets and fixtures. Furthermore, in the present embodiment, the case where it is used for a seismic isolation device has been described, but it goes without saying that it can be applied as a horizontal movement device such as a transport device, a single-axis table, a biaxial table, a display table, a drawer table, or the like.

  Further, the ball groove shape may be various forms such as a straight line other than a straight line. For example, a crossing portion is given at a crossing angle θ at the center and both ends, and the crossing angle between the center and the end is set to 0 ° or smaller than θ so that resistance is not applied at both ends and the center so as to prevent self-running. In the meantime, various forms are possible, such as a horizontally moving part for the positioning device that makes it easy to move by lowering friction. Further, the horizontally moving parts are not necessarily in the same shape, but may be combined in different forms. The materials of the balls, ball grooves, plates, etc. may be appropriately selected and combined with non-ferrous alloys such as aluminum alloys, resins, ceramics, etc., in addition to iron, steel, etc., depending on applications, loads, vibrations, operating conditions, and the like.

It is a top view of the seismic isolation component (horizontal movement component) which consists of an opposing linear ball groove. FIG. 2 is an operation explanatory diagram of FIG. 1. The result of measuring the friction coefficient for each crossing angle θ of the seismic isolation component (horizontal moving part) shown in FIGS. 1 and 2 is shown, the horizontal axis shows the crossing angle θ, and the vertical axis shows the friction coefficient μ. It is a schematic diagram of the horizontal movement component which shows the shape of the ball groove of the seismic isolation apparatus of this invention, (a) is a top view of a lower guide part, (b) is a bottom view of an upper guide part, (c) is an up-and-down guide. (D) is a plan view when the upper guide part is moved sideways (left), and (e) is a top view of the ball groove when the upper guide part is further moved laterally. It is a top view when a ball | bowl is located in FIG. 4A is a plan view (upper) of the lower plate (the lower plate of the second moving part), FIG. 4B is a side view, and FIG. FIG. (A) of the seismic isolation device using the horizontally moving component of FIG. 4 is a plan view (upper) of the intermediate plate, and a top view of the lower plate of the first moving component, (b) is a side view, c) is a bottom view and a bottom view of the upper plate of the second moving part, and (d) is a rear view. 4A is a plan view (up) of the upper plate (upper plate of the first moving component), FIG. 4B is a front view, and FIG. 4C is a bottom view. is there. FIG. 4A is a perspective view of the seismic isolation device showing the embodiment of the present invention when the ball is in the neutral position, and FIG. 4B is a plan view. 4A is a perspective view of the seismic isolation device when the intermediate (and upper) plate moves in the lateral (right) direction as viewed in the figure, and FIG. 4B is a plan view. It is. 4A is a perspective view when the upper plate moves in the longitudinal (upward) direction as viewed in the figure, and FIG. 4B is a plan view. 4A is a perspective view of the seismic isolation device when the lower plate is moved in the horizontal (right) direction and the upper plate is moved in the vertical (up) direction. FIG. 4B is a plan view.

Explanation of symbols

1, 41 Horizontally moving parts or seismic isolation parts 2, 52 Upper guide part 2c, 3c Central part 3, 42 Lower guide part 3b, 42a Lower guide part upper surface 4, 53, 53 ', 143, 143' Upper guide part ball Grooves 5, 43, 43 ', 153, 153' Ball grooves 6 and 40 of the lower guide part Balls 52a Upper guide part lower surface 45a and 55a Ball groove end 101, 104 Guide 102, 103 Guide groove 108 Guide tip part 109 Guide groove bottom part 110 Guide tip step portion 111 Guide groove bottom step portion 121 Horizontal movement device or seismic isolation device 122a Upper plate lower surface (lower surface of upper plate of first moving component)
123a Lower plate upper surface (lower plate upper surface of second moving part)
124 Intermediate plate (intermediate member)
124a Upper surface of intermediate plate (upper surface of lower plate of first moving part)
124b Lower surface of intermediate plate (lower surface of upper plate of second moving part)
C Center (part)
θ, θ2 crossing angle

Claims (4)

An upper guide portion provided with a ball groove provided in a linear shape extending in both longitudinal directions from the center portion on the lower surface side, and a lower guide provided with a ball groove provided in a linear shape extending in both longitudinal directions from the center portion on the upper surface side. A horizontally moving component comprising: a guide portion; a ball fitted to the ball groove of the upper guide portion and the ball groove of the lower guide portion, and provided so as to be able to slide or roll between the both ball grooves; At least three or more sets of the horizontally moving parts are arranged, and an upper plate provided with all the upper guiding parts of the horizontally moving parts, and a lower plate provided with all the lower guiding parts of the horizontally moving parts, A horizontal movement device or a seismic isolation device having a T-shaped guide groove extending in a uniaxial direction and formed on either the lower surface of the upper plate or the upper surface of the lower plate, and the T-shaped guide groove The side opposite the side where the is formed A guide formed in a plate and extending in the same direction as the guide groove and projecting in a slidable manner in the guide groove, and the upper plate and the lower plate are mutually connected At the center position, the bottom of the T-shaped guide groove and the tip of the T-shaped guide are not in contact with each other, and the ball is balled at a position where the upper plate and the lower plate are at or beyond the end of the ball groove. A horizontal movement device that is movable in a uniaxial direction, wherein a bottom step portion of the T-shaped guide groove and a tip step portion of the T-shaped guide are in contact with each other so as not to float above the groove, or Seismic isolation device. The depth of the bottom part of the ball groove of at least one of the opposing ball grooves gradually increases from both ends, and the depth of the bottom part of the center part is the largest. Horizontal movement device or seismic isolation device. At least one or more sets of the ball grooves arranged so as to face each other through the balls have a crossing angle of an angle of more than 0 ° and not more than 90 ° when viewed from the vertical direction. The horizontal movement device or seismic isolation device according to claim 1 or 2, wherein the dividing line is in the same direction as the movement direction of the T-shaped guide groove and the T-shaped guide. The upper or lower plate of the horizontal movement device or the seismic isolation device is arranged on the upper side of the intermediate member to be a first moving part, and the upper or lower plate of the horizontal movement device or the seismic isolation device is below the intermediate member. The first moving part and the moving direction of the second moving part are arranged so as to be at right angles to each other. Or the horizontal movement apparatus or seismic isolation apparatus of 3 description.

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