JP6928950B2 - A caster equipped with a seismic isolation device, its lock device, and a seismic isolation device. - Google Patents

Description

The present invention relates to a seismic isolation device provided on an attached body having legs and casters such as furniture and a floor head stand, a lock device thereof, and a caster provided with the seismic isolation device.

In general, floor heads placed near furniture and hospital beds are provided with casters at the bottom four corners. Such casters are equipped with a locking device that selectively operates the wheels of the casters in a locked state and an unlocked state in order to prevent furniture and floor heads from moving freely due to shaking during an earthquake, at a desired location. After installing the wheel, the wheel is locked by a locking device to prevent the furniture and floor head from moving even when it shakes.

In such a conventional caster locking device, the actuating contact pin supported by the caster body so as to be vertically movable is urged upward by a spring, and the actuating contact pin is moved up and down by an operation lever to move the ascending position and the descending position. The lock member is fixed to the operating communication pin and moved up and down integrally, and the first engaging portion of the locking member is engaged with the engaging body of the vertical shaft at the lowered position of the operating connecting pin. The turning is stopped, and the second engaging portion of the lock member engages with the engaging surface of the wheel to stop the rotation of the wheel. In this way, conventionally, casters provided on furniture and floor pedestals are designed to cope with shaking during an earthquake by stopping turning and wheel chocks. Further, a recessed portion having a different circumferential position is formed in an engaging plate attached to one end of the operating tool, an engaging pin is inserted into a pair of elongated holes formed in the support tool so as to be displaceable, and the recessed portion is formed by a spring. A locking device for holding the operating tool is provided in an urging manner (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2011-98657

However, in the caster locking device shown in Patent Document 1, although the wheels are locked in rotation and rotation with respect to the casters when locked, since the ground contact area of the wheels is small, furniture, floor heads, etc. are used in the event of an earthquake. When a large external force is applied to the attached body, there is a problem that the attached body slips on the floor or falls over with the wheels locked. Further, although the operating tool is locked, there is a problem that the lock is released when an impact is applied.

The present invention has been made to solve the above problems, and provides a seismic isolation device having a simple configuration, high safety and easy operation, and a lock device and an exemption that can be easily and reliably locked. The purpose is to provide casters equipped with seismic isolation devices.

The seismic isolation device according to claim 1 of the present invention is connected to a grounding device provided on the attached body and having an elastic grounding portion that can move up and down so as to be able to transmit an external force to the grounding portion of the grounding device. An operating mechanism that displaces the operating member to bring the grounded portion into contact with the floor, and a holding mechanism that holds the grounded portion at an upper non-grounded position and a lower grounded position according to the displacement of the operating member. It is characterized by having and.

In the seismic isolation device according to claim 1 of the present invention, a grounding device provided on the attached body and having an elastic grounding portion that can move up and down is connected to the grounding portion of the grounding device so as to transmit an external force. An operating mechanism that displaces the operating member to bring the grounded portion into contact with the floor, and a holding mechanism that holds the grounded portion at an upper non-grounded position and a lower grounded position according to the displacement of the operating member. By providing the above, when the operating member is displaced and held, the ground contact portion can be brought into contact with the floor to increase the ground contact surface, and the seismic isolation performance is improved.

In the seismic isolation device according to the present invention, the grounding device is fitted into a support member attached to the bottom surface of the attached body and the support member so as to be movable up and down by preventing the support member from falling off, and a grounding portion is provided at the lower end. The operating member is provided with a swinging member provided with a swinging member, and a swinging mechanism having a swinging member that is swingably supported by the support member and moves the moving member up and down, and the operating mechanism has the same axis as the swinging member. A shaft member connected on the core may be provided, and the operating member may be connected to the shaft member via a holding mechanism to rotate the shaft member. Further, the swing mechanism may have the swing end of the swing member engaged with the operating member. Further, in the swing mechanism, the swing end of the swing member is placed on the upper end of the motion member, and the motion member is always urged upward between the motion member and the support member. The first urging member may be provided to be configured. Further, a second urging member that urges the grounding portion downward may be provided between the operating member and the grounding portion.

Further, in the seismic isolation device according to the present invention, the holding mechanism is attached to a mounting member attached to the bottom surface of the attached body to pivotally support one end of the shaft member, and one end of the shaft member housed in the mounting member. An engaging member having a recess formed by being fitted, having one end connected to the operating member, and having a recessed portion formed at the outer edge of the other end at a different circumferential position with respect to the shaft member, and a mounting member. It is preferable that the slit is provided with a lock pin inserted so as to face the outer edge of the other end so as to be able to move forward and backward, and a spring for urging the lock pin toward the outer edge of the other end. Further, the holding mechanism is configured to lock the operating member at a predetermined position when the operating member is pressed in one direction to hold the grounding device in the grounded state, and lock the operating member when pressed. May be configured by a locking mechanism provided with an unlocking operating member that releases the grounding device to return it to its original position and puts the grounding device in a non-grounded state. Further, in the engaging member, the upper concave portion is formed in a curved shape in which the opening is widened, and the lower concave portion is formed so as to be inclined with almost the same width as the lock pin, so that the entire circumference of the lock pin can be accommodated. A long hole is formed, and a convex portion having an arc-shaped tip is formed between the upper concave portion and the lower concave portion, and the operating member is lowered from the non-grounded position. When pushed and tilted, the lock pin retracts against the urging force of the spring, the operating member reaches the ground contact position at a predetermined tilt angle, and when the slot and the slot match, the lock pin is pushed into the slot. It may be configured to be guided in and lock the operating member. Further, the unlocking operation member includes a rotating portion that is fitted to one end of the shaft member so as to be relatively rotatable, and an unlocking operating portion that extends outward from the rotating portion and projects outward from the attached body. And a bent part that extends inward from the rotating part and comes into contact with the lock pin, and when the unlocking operation part is pressed in one direction, the lock pin resists the urging force of the spring. It may be retracted and detached from the lower elongated hole of the engaging member.

Further, the seismic isolation device according to the present invention is a single unit in which a pair of grounding devices are provided at the outer edge corners of the attached body, and operating members are connected between engaging members of holding mechanisms corresponding to the grounding devices. It may be composed of an operating member. Further, at the outer edge corner of the attached body, another grounding device is provided on the side facing the pair of grounding devices so as to face each other at an equal distance from the pair of grounding devices, and these other grounding devices are provided. A transmission mechanism may be provided for each of the different rows, in which the shaft member is projected from the mounting member of the above and the shaft member of the pair of grounding devices and the shaft member of another grounding device are connected so as to be able to transmit an external force. Further, the attached body may be provided with legs or casters for ensuring a gap between the bottom surface of the attached body and the floor. The operating member may be provided on the same axis as the turning axis of the caster.

The lock device according to claim 14 of the present invention is rotatably supported by a shaft, one end of which is connected to an operating device, and a shaft member that switches the operating device between an operating state and a non-operating state, and is connected to the shaft member. It is equipped with an operating member that rotates the shaft member to operate the operating device, and also has a locking mechanism that locks the operating member at a predetermined position and holds the operating device in the operating state when the operating member is swung in one direction. The locking mechanism is provided with an unlocking operating member that unlocks the operating member when pressed to return it to its original position and puts the operating device in a non-operating state. ..

In the lock device according to claim 14 of the present invention, a shaft member that is rotatably supported by a shaft, one end of which is connected to an operating device to switch the operating device between an operating state and a non-operating state, and a shaft member connected to the shaft member. It is equipped with an operating member that rotates the shaft member to operate the operating device, and also has a locking mechanism that locks the operating member at a predetermined position and holds the operating device in the operating state when the operating member is swung in one direction. The locking mechanism is provided with an unlocking operating member that unlocks the operating member when pressed to return it to its original position and puts the operating device in a non-operating state. Since the unlocking operation member must be operated, the operation member can be firmly locked. Therefore, even if it receives an impact from the outside, it is difficult to release the lock.

In the locking device according to the present invention, the locking mechanism is fitted to a mounting member mounted on the bottom surface of the mounted body to pivotally support the other end of the shaft member and the other end of the shaft member housed in the mounting member. An engaging member having a recessed portion formed by being worn, one end swinging edge portion connected to the operating member, and the other end swinging edge portion formed at a different circumferential position with respect to the shaft member, and a mounting member. The slit formed in the above is provided with a lock pin that is inserted so as to be able to move forward and backward facing the other end swinging edge portion, and a spring that urges the lock pin toward the other end swinging edge portion side. In the engaging member, the upper concave portion is formed in a curved shape in which the opening is widened, and the lower concave portion is formed so as to be inclined with almost the same width as the lock pin, so that the entire circumference of the lock pin can be accommodated. Along with forming a long hole, a convex portion having an arc-shaped tip is formed between the upper concave portion and the lower concave portion, and the operating member is pushed downward from the non-operating position. When turned and tilted, the lock pin is retracted against the urging force of the spring, the operating member reaches the operating position at a predetermined tilt angle, and when the slot and the slot match, the lock pin is guided into the slot. It may be configured to lock the operating member. Further, the unlocking operation member according to claim 9 may be provided.

The caster provided with the seismic isolation device according to claim 17 of the present invention is rotatably attached to the attached body via a support member and rotatably supported by a caster main body having a swivel shaft and a caster main body. A grounding device equipped with wheels and an elastic grounding portion that can move up and down on the same axis as the swivel shaft is connected to the grounding portion of the grounding device so that an external force can be transmitted to displace the operating member. A seismic isolation device having an operating mechanism for bringing the grounding portion into contact with the floor and a holding mechanism for holding the grounding portion at an upper non-grounding position and a lower grounding position according to the displacement of the operating member. It is characterized by being equipped with.

In the caster provided with the seismic isolation device according to claim 17 of the present invention, the caster body is rotatably attached to the attached body via a support member and has a slewing shaft, and the caster body is rotatably supported by the caster body. A grounding device equipped with wheels and an elastic grounding portion that can move up and down on the same axis as the turning shaft is connected to the grounding portion of the grounding device so that an external force can be transmitted to displace the operating member. A seismic isolation device having an operating mechanism for bringing the grounding portion into contact with the floor and a holding mechanism for holding the grounding portion at an upper non-grounding position and a lower grounding position according to the displacement of the operating member. Since the seismic isolation device is built into the caster and integrally provided, it is not necessary to provide a turning lock mechanism or a wheel lock mechanism. Therefore, the caster can be simplified.

In the caster provided with the seismic isolation device according to the present invention, the grounding device has an upper end that prevents the support member from falling off and protrudes, and is slidably fitted into a swivel shaft and has a grounding portion at the lower end. Is provided with an operating member to which the moving member is attached and a swinging mechanism having a swinging member that is swingably supported by the supporting member and moves the moving member up and down, and the operating mechanism has the same shaft core as the swinging member. A shaft member connected above the shaft member may be provided, and the operating member may be connected to the shaft member via a holding mechanism to rotate the shaft member. Further, the swing mechanism according to claim 3 or 4 may be provided. Further, the second urging member according to claim 5 may be provided. It is preferable that the holding mechanism is the holding mechanism according to any one of claims 6 to 9.

The seismic isolation device according to the present invention is connected to a grounding device provided on the attached body and having an elastic grounding portion that can move up and down, and the grounding portion of the grounding device so as to transmit an external force to connect an operating member. It is provided with an operating mechanism that displaces the grounded portion to bring it into contact with the floor, and a holding mechanism that holds the grounded portion at an upper non-grounded position and a lower grounded position according to the displacement of the operating member. Therefore, when the operating member is displaced and held, the ground contact portion can be brought into contact with the floor to increase the ground contact surface, and the seismic isolation performance is improved.

Further, the lock device according to the present invention is rotatably supported by a shaft member, one end of which is connected to an operating device to switch the operating device between an operating state and a non-operating state, and a shaft member connected to the shaft member. It is provided with an operating member for operating the operating device by rotating the operating member, and also provided with a locking mechanism for locking the operating member at a predetermined position and holding the operating device in an operating state when the operating member is swung in one direction. Since the lock mechanism is provided with an unlocking operation member that unlocks the operating member when pressed to return it to its original position and puts the operating device in a non-operating state, even if an impact is applied to the operating member. It is difficult to return to the non-operating position, improving safety.

Further, the caster provided with the seismic isolation device according to the present invention includes a caster body that is rotatably attached to an attached body via a support member and has a slewing shaft, and wheels that are rotatably supported by the caster body. A grounding device having an elastic grounding portion that can move up and down on the same axis as the swivel shaft, and a grounding device that is connected to the grounding portion of the grounding device so that an external force can be transmitted to displace the operating member. A seismic isolation device having an operating mechanism for bringing the grounding portion into contact with the floor and a holding mechanism for holding the grounding portion at an upper non-grounding position and a lower grounding position according to the displacement of the operating member. Therefore, the ground contact surface can be increased as compared with the wheels, so that the seismic isolation performance is improved. Further, since the seismic isolation device is incorporated in the caster and integrally provided, it is not necessary to provide a turning lock mechanism or a wheel lock mechanism, and the number of parts can be reduced. Therefore, the structure of the caster can be simplified and the cost can be reduced.

FIG. 1 is a side view showing a receiving body provided with a seismic isolation device according to the first embodiment of the present invention. FIG. 2 is a perspective view showing the attached body and the seismic isolation device of FIG. FIG. 3 is a bottom view showing a seismic isolation device provided on the attached body. (A) to (D) of FIG. 4 are explanatory views showing the grounding device and the operation mechanism of the seismic isolation device, respectively, and (A) and (B) are front views and perspective views when not grounded, respectively. C) and (D) show a front view and a perspective view at the time of touchdown, respectively. 5A and 5B are explanatory views showing the operation of the grounding device and the swinging member, respectively, and FIGS. 5C and 5D are the operating member and the grounding during non-operation and operation, respectively. It is explanatory drawing which shows the state of a part. 6 (A) and 6 (B) are an explanatory diagram of a part of a main part showing a seismic isolation device provided on the attached body and an explanatory diagram of a transmission mechanism, respectively. FIG. 7 is a partially omitted explanatory view of a main part viewed from above in a state where the holding mechanism is attached to the attached body. It is explanatory drawing which shows the operation of a holding mechanism. 8A and 8B are explanatory views showing the operation of the holding mechanism and enlarged explanatory views showing the main parts of the engaging members of the holding mechanism, respectively. 9 (A) to 9 (D) are explanatory views showing the grounding device and the operating mechanism of the seismic isolation device according to the second embodiment of the present invention, respectively, and (A) and (B) are non-grounded, respectively. The front view and the perspective view at the time are shown, and (C) and (D) show the front view and the perspective view at the time of touchdown, respectively. 10A and 10B are perspective views and side views showing a modified example of the support member according to the first and second embodiments of the present invention, respectively. 11 (A) and 11 (B) are explanatory views of the seismic isolation device according to the third embodiment of the present invention when not grounded and when grounded, respectively. FIG. 12 is a perspective view of a main part of the seismic isolation device of FIG. FIG. 13 is an explanatory diagram showing a seismic isolation device according to a fourth embodiment of the present invention. FIG. 14 is a perspective view showing a main part of the seismic isolation device of FIG. FIG. 15 is a side view showing a part of the operation mechanism of the seismic isolation device of FIG. FIG. 16 is a perspective view showing the operation mechanism of the seismic isolation device of FIG. FIG. 17 is a perspective view showing a main part of the operation mechanism of the seismic isolation device of FIG. 18 (A) and 18 (B) are explanatory views showing the operation of the lock mechanism of the seismic isolation device of FIG. 13, respectively. FIG. 19 is a perspective view showing a main part of the operation mechanism of the seismic isolation device of FIG. 20 (A) and 20 (B) are perspective views and plan views showing a modified example of the seismic isolation device according to the fourth embodiment of the present invention, respectively. 21 (A) and 21 (B) are a plan view and a partially broken side view showing a caster provided with a seismic isolation device according to a fifth embodiment of the present invention, respectively. 22 (A) and 22 (B) are front views and perspective views of the caster provided with the seismic isolation device of FIG. 21 when not grounded, and FIGS. 22 (A) and 22 (B) are when the caster is grounded, respectively. It is a front view and a perspective view of.

Hereinafter, the seismic isolation device 2 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 7. As shown in FIGS. 1 to 3, the seismic isolation device 2 according to the first embodiment of the present invention is provided on furniture (attached body) 3 having a flat rectangular bottom used in hospitals, facilities, and the like. Be done. Legs 5 having the same height dimension T1 are provided at the four corners of the bottom surface 4 of the furniture 3. The seismic isolation device 2 includes a grounding device (operating device) 6, an operating mechanism 7, and a holding mechanism 8. Hereinafter, the same reference numerals indicate the same or corresponding parts.

As shown in (A) to (D) of FIG. 4 and (A) and (B) of FIG. 5, the grounding device 6 is a support member 10 (10FR, 10FL,) attached to the inside of the leg 5 of the furniture 3. 10RR, 10RL), an operating member 11 that is movably fitted into the support member 10, a seismic isolation member (grounding portion) 13 provided at the lower end of the operating member 11, and swinging into the support member 10. It is configured to include a swing mechanism 15 that is pivotally supported and has a swing member 14 that moves the moving member 11 up and down in response to the movement of the swing end 14A.

The support member 10 is formed by bending a metal fitting into a U-shaped cross section, and a flange portion 21 having a mounting screw hole formed on the upper end opening edge is provided on the lower side of the bottom portion 23 between the side walls 22A and 22B. Is provided with a cylindrical portion 24, respectively. A circular rod-shaped operating member 11 is fitted into the circular hole formed in the bottom 23 of the support member 10 so as to be movable up and down. The operating member 11 is provided with a retaining 12 at the upper portion, and a first spring (first urging member) 25 is disposed between the retaining 12 and the bottom 23, so that the operating member 11 is always upward. It is supposed to be urged to. Further, the operating member 11 is provided with a spring receiver 26 at an intermediate portion so as to be displaced in the cylindrical portion 24 according to the vertical movement of the operating member 11.

The seismic isolation member 13 is made of an elastic friction material made of circular rubber or synthetic resin. As shown in FIGS. 5C and 5D, a recessed portion 13A is formed on the upper surface of the seismic isolation member 13. The seismic isolation member 13 accommodates the lower end large-diameter portion 11B of the operating member 11 in the tubular body 28 provided in the recessed portion 13A, prevents the member from falling off, and is connected so as to be movable up and down. A second spring (second urging member) 27 is arranged between the recessed portion 13A and the spring receiver 26 so that the seismic isolation member 11 is always urged downward. That is, when the operating member 11 is not subjected to an external force, it is displaced upward by the urging force of the first spring 25 (see (A) and (B) in FIG. 4 and (A) in FIG. 5), and the operating member 11 Is pressed by the swing member 14 and displaced to the lower ground contact position against the urging force of the first spring 25, the seismic isolation member 13 is pressed against the floor F by the urging force of the second spring 27. (See (C) and (D) in FIG. 4 and (B) and (D) in FIG. 5). As described above, the grounding device 6 includes a second spring 27 that presses the seismic isolation member 13 against the floor F when the grounding device 6 is grounded (during operation).

The base of the swing member 14 is fitted into a sleeve 32 rotatably supported by a circular hole formed in both side walls 22A and 22B of the support member 10, and the swing end 14A is the upper end of the operating member 11. It is designed to be placed on 11A. The swing end 14A of the swing member 14 swings as the sleeve 32 rotates, and operates when a force that overcomes the urging force of the first spring 25 is applied from the sleeve 32 side. When the member 11 is pushed down and the external force is lost, the member 11 is returned to the original upper position by the urging force of the first spring 25. As described above, the swing mechanism 15 includes the swing member 14, the first spring 25, and the sleeve 32.

As shown in FIGS. 6 and 7, the operation mechanism 7 has one end connected to the same shaft core as the sleeve 32, and the other ends 40A and 40A are pivotally supported by the circular holes 42D and 42D of the mounting members 42 and 42. A member 40, 40 and an operation pedal (operation member) 41 connected to the other ends 40A, 40A of the shaft members 40, 40 via a holding mechanism 8 described later to rotate the shaft members 40, 40 are provided. It is composed. The attachment members 42, 42 are attached to the bottom surface 4 of the furniture 3, and are attached in pairs between the support members 10FL and 10FR provided in pairs on the front side 1 side 3A of the outer edge of the furniture 3.

As shown in FIGS. 7 and 8A, the mounting member 42 includes both side walls 42A and 42B and an intermediate wall 42C connecting the side walls 42A and 42B, and the upper end opening edges of the side walls 42A and 42B. Each has a flange portion 43 having a mounting screw hole formed therein. The lower side of the mounting member 42 and the outer edge side of the furniture 3 are open. An engaging member 44 having a U-shaped cross section is fitted to the other end 40A of the shaft member 40 so as to be integrally movable within the mounting member 42. The engaging member 44 includes both side wall portions 44A and 44B and an intermediate wall portion 44C that connects the two wall side portions 44A and 44B and faces the outer edge side of the furniture 3. That is, the intermediate wall portion 44C is arranged so as to face the intermediate wall 42C of the mounting member 42. Both end bent portions 41A and 41B of the operation pedal 41 are connected to the intermediate wall portion 44C of the engaging member 44. The operation pedal 41 is formed by bending a pipe material into a U shape. When the operation pedal 41 is oscillated, the shaft member 40 is rotated in the forward and reverse directions via the engaging member 44, and the oscillating member 14 is oscillated with this rotation.

Of the swinging ends of the side wall portions 44A and 44B of the engaging member 44, the side opposite to the intermediate wall portion 44C (the other end swinging edge portion) is as shown in FIGS. 8A and 8B. The upper concave portion 45 and the lower concave portion 46 are formed in a curved shape with widened openings, respectively, at different positions in the circumferential direction with respect to the axial center O1 of the shaft member 40. A convex portion 49 whose tip is formed in an arc-shaped curve is formed between the two concave recesses 45 and 46 so as to partition the two concave recesses 45 and 46. The convex portion 49 is formed to be shorter than the line connecting the upper edge protruding portion of the upper concave portion 45 and the lower edge protruding portion of the lower concave portion 46. Further, slits 42Aa and 42Ba are formed in the side walls 42A and 42B of the mounting member 42 in the horizontal direction at substantially the same height as the axial center O1 of the shaft member 40. A lock pin 47 is inserted through the slits 42Aa and 42Ba so that both ends of the slits 42Aa and 42Ba are moved forward and backward to prevent them from falling off. A spring 48 is provided between the lock pin 47 and the intermediate wall 42C, and the lock pin 47 is constantly urged toward the recessed portions 45 and 46 of the engaging member 44. When the lock pin 47 is received, the upper concave portion 45 and the lower concave portion 46 are shallow so that almost half of the entire circumference of the lock pin 47 comes into contact with each other. The curved surface 46A of the lower concave portion 46 is adapted to match the peripheral surface of the lock pin 47, and when the lock pin 47 is pressed against the lower concave portion 46, the engaging member 44 is held in that state. Will be done. That is, the operation pedal 41 is held at that position. When the operation pedal 41 is pushed and turned upward in the return direction from that state, the urging force of the second spring 27 of the grounding device 6 is received via the shaft member 40, so that the operation pedal 41 is pushed in the return direction with a slight force. Just by turning it, it is automatically rotated in the return direction. At this time, the lock pin 47 is extruded to the lower edge portion of the lower recessed portion 46, and is opposed to the urging force of the spring 48 in the slits 42Aa and 42Ba along the arcuate tip portion 49A of the convex portion 49. It retracts, separates from the lower recessed portion 46, and is guided to the upper recessed portion 45.

Therefore, when the operation pedal 41 is in a substantially horizontal position, the lock pin 47 is elastically urged and pressed against the upper recessed portion 45 by the spring 48 to hold the operation pedal 41 at that position. There is. At this time, the shaft member 40 is in a state of turning all the way to the restricted end in the clockwise direction with respect to the axial center O1 shown in FIG. It is designed to be located. Then, when the operation pedal 41 is pushed down by an external force, the lock pin 47 retracts against the urging force of the spring 48, is guided to the lower recessed portion 46, and is pressed by the spring 48. Therefore, the engaging member 44 and the operation pedal 41 are held in an inclined state. At this time, the shaft member 40 is in a state of turning all the way to the regulation end in the counterclockwise direction with respect to the axis O1 shown in FIG. 8A, and the swing end 14A of the swing member 14 is downward. It is pushed down, the operating member 11 is pushed down to a lower position, and the seismic isolation member 13 is pressed against the floor F by the second spring 27. As described above, the holding mechanism 8 includes a mounting member 42, an engaging member 44, a lock pin 47, and a spring 48.

The grounding device 6 is provided at the four corners of the bottom surface 4 of the furniture 3. That is, as shown in FIGS. 2 and 3, the pair of front grounding devices 6A and 6B are connected to the operation mechanism 7, and another pair is on the side facing the pair of grounding devices 6A and 6B. Grounding devices 6C and 6D are provided. These other pairs of grounding devices 6C and 6D are provided facing each other at equal distances from the pair of grounding devices 6A and 6B, respectively. The grounding devices 6A and 6C form a grounding device in the first row (grounding device in the right row), and the grounding devices 6B and 6D form a grounding device in the second row (grounding device in the left row). .. Then, the grounding devices 6A and 6C in the first row on the right side and the grounding devices 6B and 6D in the second row on the left side are connected to the pair of grounding devices 6A and 6B on the front side to the rear by the transmission mechanism 9, respectively. The external force is transmitted to another pair of grounding devices 6C and 6D on the side.

That is, as shown in FIGS. 6A and 6B, another pair of grounding devices 6C and 6D on the rear side have one end connected to the sleeves 32 and 32 on the same shaft core, respectively. 50 and 50 are provided. The shaft members 50, 50 are extended to the side where the other ends 50A, 50A face each other. Long and thin plate-shaped links 51 and 52 are provided at the shaft members 40 and 40 and the extension ends 50A and 50A of the shaft members 50 and 50, respectively. One end of one link 51 is rotatably fitted to the shaft member 40 and one end of the other link 52 is rotatably fitted to the extension end 50A so as to move integrally. Both ends of the connecting rod 53 are rotatably pivotally supported at the other ends of the links 51 and 52. Therefore, when the operation pedal 41 is swung, the rotation of the shaft members 40, 40 is transmitted to the grounding devices 6C, 6D on the rear side via the connecting rods 53, 53 in each row, and the seismic isolation member 13 , 13 is designed to move up and down. As described above, the transmission mechanism 9 includes the links 51 and 52 and the connecting rod 53.

Next, the operation of the seismic isolation device 2 will be described based on the operation of the seismic isolation device 2 according to the first embodiment. In the seismic isolation device 2 according to the present embodiment, when the furniture 3 is installed at a desired position, the operation pedal 41 is first pulled up to an upward horizontal position. Then, since the shaft member 40 is rotated to the restricted end position in the clockwise direction with respect to the axial center O1 shown in FIG. 8 (A), the swing member 14 swings as shown in FIG. 5 (A). The moving end 14A is located at the uppermost position, the operating member 11 is urged upward by the urging force of the first spring 25, and the upper end surface 11A is in contact with the lower surface of the swinging end 14A. At this time, the spring receiver 26 of the operating member 11 is located near the upper surface in the cylindrical portion 24, and the seismic isolation member 13 is brought into contact with the lower end surface of the cylindrical portion 24 by the second spring 27 (FIG. 5). (A), (C)). In this state, the seismic isolation member 13 is located above the lower end surface of the leg 5, and the grounding device 6 is in a non-operating state.

Next, when the seismic isolation device 2 is operated, when the operation pedal 41 is pushed downward from the horizontal position, the engaging member 44 is integrally moved, and the shaft member 40 is moved to the shaft shown in FIG. 8 (A). Rotate counterclockwise with respect to the center O1. As the shaft member 40 rotates, the swing member 14 swings, the swing end 14A presses the upper end surface 11A of the operating member 11, and an external force resisting the urging force of the first spring 25 is applied. Then, the operating member 11 is displaced downward. At this time, the external force from the operation pedal 41 is transmitted not only to the grounding devices 6A and 6B on the front side but also to the grounding devices 6C and 6D on the rear side through the connecting rod 53 of the transmission mechanism 9, and the operating member 11 is displaced downward. do. Therefore, by operating the operation pedal 41, the operating members 11 of the grounding devices 6A to 6D arranged at the four corners of the furniture 4 are displaced downward all at once. Then, when the operation pedal 41 reaches a predetermined lower position, it is held at that position by the lock pin 47. At this time, since the seismic isolation member 13 is urged by the second spring 27, the lower surface 13B is pressed against the floor F when trying to displace downward from the leg 5. At this time, since the lock pin 47 of the holding mechanism 8 is pressed against the lower recessed portion 46 of the engaging member 44 by the spring 48, the operating pedal 41 is tilted downward even when the foot is released from the operating pedal 41. Be retained. In this way, the seismic isolation member 13 is pressed against the floor F simply by operating the operation pedal 41 with one touch. Therefore, even if a shaking force is applied to the furniture 3 due to an earthquake or the like, the furniture 3 does not slip or fall, and the safety is improved. When the operation pedal 41 is pulled upward to release the grounding operation of the seismic isolation device 2, the operation pedal 41 is automatically returned to the original non-grounding position in combination with the urging force of the second spring 27. It is restored, and the grounding device 6 can be restored to the non-operating state. As described above, in the seismic isolation device 2 according to the present embodiment, since the seismic isolation member 13 is pressed against the floor F, even if the furniture 3 shakes due to an earthquake or the like, it is difficult to fall and slip. .. Therefore, the seismic isolation device 2 according to the present embodiment has the effect of having a simple configuration, high safety, and easy operation.

In the first embodiment, the grounding devices 6 (6A to 6D) of the seismic isolation device 2 are provided at the four corners of the furniture 3, and four are attached, but the weight of the furniture 3 is not limited to this. Depending on the size and size, two pairs may be provided, or only one may be provided alone.

Next, the seismic isolation device 102 according to the second embodiment of the present invention will be described. In the seismic isolation device 102 according to the first embodiment, in the seismic isolation device 2 according to the first embodiment, the swing end 14A of the swing member 14 is placed on the upper end surface 11A of the operating member 11. On the other hand, as shown in FIGS. 9A to 9D, the swinging end 114A of the swinging member 114 of the grounding device 106 is locked to the upper part of the operating member 111 and moves integrally. The seismic isolation device 2 according to the first embodiment has almost the same configuration as the seismic isolation device 2 except that the above-mentioned first embodiment is different.

That is, a through hole 114B is formed in the swinging end 114A of the swinging member 114 in the vertical direction, a small diameter portion 111A is formed in the upper portion of the circular rod-shaped operating member 111, and a large diameter portion 111B is formed in the lower portion. .. A through hole 114B of the swing end 114A is loosely fitted in the small diameter portion 111A, and a retaining 112 is attached to the upper end of the operating member 111 to prevent the swing end 114A from coming off. The swinging end 114A is displaceable up and down along the small diameter portion 111A and is in contact with the upper end surface 111C of the large diameter portion 111B. When the operation pedal 41 is in the upper horizontal position, the swing end 114A of the swing member 114 is located upward, the retaining 112 is arranged on the swing end 114A, and the operation member 111 is at the uppermost position. To position. At this time, the seismic isolation member 13 is held above the lower end of the leg 5.

When operating the seismic isolation device 102, when the operation pedal 41 is pushed downward from the upper horizontal position, the shaft member 40 is rotated counterclockwise with respect to the axis O1 and the swing end of the swing member 114. When 114A is displaced downward along the small diameter portion 111A, abuts on the upper end surface 111C of the large diameter portion 111B, pushes down the operating member 111 downward, and the operating pedal 41 reaches the lower restricting end, the operating member 111 Reaching the lowest position, the seismic isolation member 13 is pressed against the floor F. The operation pedal 41 is held by the lock pin 47 of the holding mechanism 8 in a state of being inclined downward. Then, when the operation of the seismic isolation device 102 is released, when the operation pedal 41 is pulled upward, the shaft member 40 is shown in FIG. 8 (B) in combination with the urging force of the second spring 27. Rotated clockwise with respect to the axial center O1, the swing end 114A lifts the retaining 112, and the operating member 111 is held at the uppermost position. As described above, in the seismic isolation device 102 according to the present embodiment, since the swing end 114A of the swing member 114 is locked to the operating member 111, it is not necessary to provide the first spring 25.

10A and 10B are perspective views and side views showing a modified example of the support member 10 of the seismic isolation devices 2 and 102 according to the first and second embodiments of the present invention, respectively. The support member 210 of the seismic isolation device 202 according to this modification is the support member 10 of the seismic isolation devices 2 and 102 according to the first and second embodiments, and the metal fitting is bent into a U-shaped cross section. A flange portion 21 having a screw hole for mounting is provided on the upper end opening edge, and a cylindrical portion 24 is provided on the lower side of the bottom portion 23 between the side walls 22A and 22B. The support member 210 of the grounding device 206 according to the above is formed so as to extend rearward from the opening of the half-split cylindrical main body 211 and the half-split cylindrical main body 211 so as to face each other, and the sleeve 32 is rotatably fitted. A pair of support portions 212A and 212B having circular holes 213 formed therein, and a cylindrical portion 224 formed at the bottom of the half-split cylindrical main body 211 through which the operating member 11 penetrates and accommodates the second spring 27. The difference is that it is integrally molded with synthetic resin. In the support member 210, a C-shaped flange portion 216 having a mounting hole 215 at the upper end portion is formed over the half-split cylindrical main body 211 and a part of the support portions 212A and 212B. In the seismic isolation device 202 provided with the support member 210 according to this modification, since the flange portion 216 is formed in an arc shape, not only can the bottom surface on the side to be attached be flat, but also a pipe having a flange can be used. It can also be applied to those provided. Therefore, versatility is improved.

Next, the seismic isolation device 302 according to the third embodiment of the present invention will be described. In the seismic isolation device 302 according to the present embodiment, in the seismic isolation devices 2, 102, 202 according to the first and second embodiments and the modified examples, the seismic isolation devices 2, 102 are provided on the furniture 3 having the legs 5. On the other hand, as shown in FIGS. 11A, 11B, and 12A, the difference is that the seismic isolation device 302 is provided on the furniture (attached body) 303 having the caster 305. It has almost the same configuration as the seismic isolation devices 2, 102, and 202 according to the first and second embodiments and the modified examples.

That is, the seismic isolation device 302 according to the third embodiment is provided on the furniture 303 having a rectangular flat plate-shaped bottom 303A. The casters 305 are rotatably attached to the four corners of the bottom 303A of the furniture 303, the caster main body 311 provided on the caster mounting member 310 via a swivel shaft (not shown), and both sides of the caster main body 311. It is configured to include wheels 312 that are rotatably provided. FIG. 11A is an explanatory diagram showing the seismic isolation device 302 when it is not grounded (when it is not operating), and FIG. 11B is an explanatory diagram showing when it is grounded (when it is operating). When the seismic isolation device 302 is not operating, the seismic isolation member 13 is held above the ground contact surface of the wheels 312 of the caster 305. During operation, the seismic isolation member 13 is pushed down by the second spring 27 below the ground contact surface of the wheels 312 of the casters 305 to support the furniture 303. As described above, the seismic isolation device 302 according to the third embodiment can be applied to furniture provided with casters 305 and a floor head stand. Moreover, since it is not necessary to provide a stopper mechanism on the caster 305, there is an effect of simplifying the structure of the caster 305 and reducing the cost.

Next, the seismic isolation device 402 according to the fourth embodiment of the present invention will be described. In the seismic isolation device 402 according to the present embodiment, in the seismic isolation devices 2, 102, 202, and 302 according to the first to third embodiments and the modified examples, the operation pedal 41 is composed of a single metal fitting. On the other hand, as shown in FIGS. 13 and 14, the operation pedals 461 and 462 are separated according to the operation, and the holding mechanism is a lock mechanism (locking device) that locks the operation pedal 461 when the operation pedal 461 is operated. ) 408 is different in that it is configured.

That is, in the seismic isolation device 402 according to the present embodiment, as shown in FIGS. 15 to 18, the operation mechanism 407 is a shaft member 440 and 440 connected on the same shaft core as the sleeve 32 of the rocking member 14. , The other end portions 440A and 440A of these shaft members 440 and 440, an operation pedal (operation member) 461 connected via a lock mechanism 408, and an unlock operation pedal (operation member, unlock operation member) 462, respectively. It is composed of. The other ends of the shaft members 440 and 440, 440A and 440A, are formed in a regular hexagonal cross section and are pivotally supported in the circular holes of the mounting members 442 and 442. Slits 442Aa and 442Ba are formed in the mounting members 442 and 442 in the horizontal direction at substantially the same height as the axial center O2 of the shaft member 440. The widths of the slits 442Aa and 442Ba are set to be slightly longer than the diameter of the lock pin 47.

An engaging member 444 having a U-shaped cross section is integrally movably fitted to the other end 440A of the shaft member 440. The engaging member 444 is configured to have a side wall portion 444A, 444B and an intermediate wall portion 444C that connects the side wall portions 444A and 444B and faces the outer edge side of the furniture 3. As shown in FIG. 17, regular hexagonal holes 442D and 442D are bored in both side wall portions 444A and 444B of the engaging member 444, and the other end portion 440A of the shaft member 440 is fitted. The operation pedal 461 is configured by molding a plate-shaped metal fitting into a U shape, and both end bent portions 461A and 461B are joined to the intermediate wall portions 444C and 444C of the engaging members 444 and 444 by welding.

As shown in FIGS. 17 and 18, the shaft of the shaft member 440 is attached to the open end portion (opposite side to the intermediate wall portion 444C, the other end swinging edge portion) of both wall side portions 444A and 444B of the engaging member 444. The upper concave portion 445 and the lower concave portion 446 are formed at different positions in the circumferential direction with respect to the center O2. A convex portion 449 having a curved tip formed into an arc shape is formed between the two concave recesses 445 and 446 to partition the two concave recesses 445 and 446. The convex portion 449 is formed so as to recede from the line connecting the upper edge protruding end 445A of the upper concave portion 445 and the lower edge protruding end 446A of the lower concave portion 446. The upper recessed portion 445 is formed so as to be curved and the opening is widened. The lower recessed portion 446 is formed in an elongated hole shape that is inclined with respect to the lower end surfaces of both wall side portions 444A and 444B and extends toward the axis O2, and the innermost portion matches the peripheral surface of the lock pin 47. It is formed in the shape of an arc. The width of the elongated hole portion of the lower recessed portion 446 is formed so as to substantially match the diameter of the lock pin 47, and the depth (depth) of the elongated hole portion is such that the entire circumference of the lock pin 47 is substantially accommodated. ing.

The unlock operation pedal 462 is configured by molding a plate-shaped metal fitting into a U shape, and is arranged above the operation pedal 461. The size of the arm portion 462C of the unlock operation pedal 462 is shorter than that of the arm portion 461C of the operation pedal 461. As shown in FIG. 17, the unlock operation pedal 462 is formed by bending the extension end of the arm portion 462C so as to incline downward, and the arm portions 462C and 462C of the bent portions 462A and 462B are formed on the arm portions 462C and 462C. Rotating portions 463, 463 are formed. The rotating portions 463 and 463 are arranged inside the engaging member 444. That is, circular holes 463A and 463A are formed in these rotating portions 463 and 463, respectively, in accordance with the cross-sectional shape of the other end portion 440A of the shaft member 440, and are fitted so as to be rotatable independently of the other end portion 440A. Will be done. In the unlock operation pedal 462, the bent portions 462A and 462B are urged by the spring 48 via the lock pin 47, and are always held in the upper horizontal position.

As shown in FIG. 15, the unlocking operation pedal 462 is used when the operation pedal 461 is tilted downward and is in the ground contact position (ground contact position of the ground contact devices 6, 106, 206) (see (B) in FIG. 18). When a pushing force is applied to the unlocking operation pedal 462 from the outside, the rotating portions 463 and 463 slide the other end portions 440A and 440A around the axial center O2 of the shaft member 440, and the bent portions 462A and 462B Displaced upward (counterclockwise in FIG. 6), the lock pin 47 was retracted against the urging force of the spring 48, and the lock pin 47 was forcibly disengaged from the lower recessed portion 446 of the engaging member 444. It is designed to lead to the upper recessed portion 445.

That is, as shown in FIG. 18A, when the operation pedal 461 is in the upper horizontal position (non-grounded position of the grounding devices 6, 106, 206), when a pushing force is applied from the outside, the operating pedal 461 is engaged. The open end on the opposite side of the intermediate wall portion 444C of the member 444 rotates upward, and the lock pin 47 retracts from the curved upper concave portion 445 along the convex portion 449 to move the top portion 449A of the convex portion 449. It passes through and reaches the entrance of the lower recessed portion 446. Then, when the elongated hole-shaped lower recessed portion 446, 446 overlaps the gaps of the slits 442Aa and 442Ba, the lock pin 47 is moved from the opening of the lower recessed portion 446, 446 to the innermost part of the lower recessed portion 446, 446 by the spring 48. It is pressed against the part. At this time, the operation pedal 461 is locked by being restricted from rotating by the lock pin 47. Therefore, even if an impact is received from the outside, the lock pin 47 is urged by the spring 48, so that the lock pin 47 is hard to come off from the lower recessed portion 446 and is securely locked. .. Then, in order to unlock the operation pedal 461, the unlock operation pedal 462 is pushed down by an external force from the upper horizontal position. Then, the bent portions 462A and 462B retract the lock pin 47 against the urging force of the spring 48 and push it toward the convex portion 449 side. When the lock pin 47 passes through the top of the convex portion 449, it is guided to the upper concave portion 445 by the urging force of the spring 48, and the operation pedal 461 is automatically combined with the urging force of the second spring 27. The operation pedal 461 is displaced to the original non-grounded position, and the operation pedal 461 returns to the upper horizontal position, that is, the non-grounded position together with the unlock operation pedal 462.

Although the unlock operation pedal 462 rotates independently of the shaft member 440, since the operation pedal 461 is arranged below the arms 462C and 462C, only the unlock operation pedal 462 is pushed down. At the same time, the unlocking operation pedal 462 and the operation pedal 461 can be pressed down. In either case, the grounding operation is canceled. Therefore, in any case, when the unlocking operation pedal 462 is pushed downward, the operation pedal 461 is also returned to the upper horizontal position, and the lock pin 47 is moved to the upper concave portion 445 of the engaging member 444. (See (A) in FIG. 18). Further, when the lock pin 47 is retracted and guided to the upper recessed portion 445 during the operation of the unlocking operation pedal 462, the engaging member 444 is rotated in the returning direction by the urging force of the second spring 27. However, the present invention is not limited to this, and a spring for urging in the return direction may be provided between the engaging member 444 and the mounting member 442.

Therefore, in the seismic isolation device 402 according to the present embodiment, from the time when the operation pedal 461 is in the upper horizontal position and the grounding devices 6, 106, and 206 are in the non-operating state, the operating state (grounding state) is set. When the operation pedal 461 is pushed downward with one touch, the lock pin 47 is elastically pressed against the elongated hole-shaped lower recessed portion 446 of the engaging member 444, and the engaging member 444 is moved downward to the operating position (grounding position). ) To be locked. At this time, since the lock pin 47 is urged by the spring 48, the lock pin 47 is difficult to separate from the lower recessed portion 446 even if an impact is received from the outside. On the other hand, when the operation pedal 461 is in the downward inclined position and the grounding devices 6, 106, and 206 are in the operating state (grounding state), the unlocking operation pedal 462 can be changed to the non-operating state (non-grounding state). When the lock pin 47 is pushed downward with one touch, the lock pin 47 is pushed out from the lower concave portion 446, guided by the convex portion 449, guided to the upper concave portion 445, and pressed by the spring 48. Therefore, the operation pedal 461 is held in the upper horizontal position. That is, the operation can be switched between the operating state (grounded state) and the non-operating state (non-grounding state) with one touch, and the operating member (operation pedal 461) can be locked in the operating state. During operation, even if an impact is received from the outside, the operating state can be reliably maintained.

In the present invention, the lock mechanism 408 is applied to the seismic isolation devices 2, 102, 202, 302, and 402, but the present invention is not limited to this, and the lock mechanism 408 can also be applied to those provided with other operating devices. Needless to say, the operating member may be reliably locked and used as a locking device capable of reliably maintaining an operating state even if an impact is received from the outside.

20 (A) and 20 (B) respectively relate to a modification of the seismic isolation device 402 according to the fourth embodiment of the present invention, and in the seismic isolation device 402 according to the fourth embodiment, the operation pedal The fourth embodiment described above is different except that the 461 is configured by molding a plate-shaped metal fitting into a U-shape, whereas the grounding operation pedal 481 is formed by molding a tubular metal fitting into a U-shape. It has almost the same configuration as the seismic isolation device 402 according to the form.

Next, the seismic isolation device 502 according to the fifth embodiment of the present invention will be described. In the seismic isolation device 502 according to the present embodiment, in the seismic isolation devices 2, 102, 202, 302, and 402 according to the first to fourth embodiments and the modified examples, the grounding device 6 is located near the leg 5 or the caster 305. , 106 and 206 are provided, whereas as shown in (A) and (B) of FIG. 21 and (A) to (D) of FIG. 22, the grounding device 506 of the seismic isolation device 502 is attached to the caster 505. The difference is that they are incorporated and provided integrally.

That is, in the seismic isolation device 502 according to the present embodiment, the operating member 511 of the grounding device 506 is housed inside the swivel shaft 530 of the caster 505 so as to be slidable in the vertical direction on the same axis. The caster 505 includes a support member 521 having a U-shaped cross section attached to furniture (attached body) (not shown), and a caster body 531 rotatably attached to the support member 521 via a hollow cylindrical swivel shaft 530. , The caster main body 531 is provided with wheels 533 and 533 rotatably provided on both sides via an axle 532.

The upper end of the swivel shaft 530 is threaded and fastened to the support member 521 by the screw fastener 534. The operating member 511 is slidably provided so as to penetrate the swivel shaft 530 and project vertically. The upper portion 511B of the operating member 511 projects upward from the bottom portion 521 of the support member 521, and the spring seat 512 is attached to the upper portion 511B. A first spring 525 is provided between the spring seat 512 and the bottom portion 521A of the support member 521, and the operating member 511 is constantly urged upward. The operating member 511 projects downward from the lower end opening of the swivel shaft 530, and a seismic isolation member (grounding portion) 513 is provided at the lower end. The seismic isolation member 513 is provided with a support guide 540 to guide the vertical movement of the seismic isolation member 513, and when the seismic isolation member 513 is grounded to the floor F, the seismic isolation member is subjected to an external force in the lateral direction. It is designed to support 513. The support guide 540 has a block portion 541 whose one surface is joined to the seismic isolation member 513, and long arm portions 543 and 543 which rise upward from both the left and right sides of the block portion 541 and have slots 542 and 542 in the vertical direction. It is configured with and. Both ends of the axle 532 are fitted in these slots 542 and 542, and the support guide 540 can be displaced relative to the axle 532 in the vertical direction. The operating member 511 is provided with a spring seat 526 on the lower large diameter portion 511C, and a second spring 527 is arranged between the spring seat 526 and the seismic isolation member 513. The second spring 527 brings the seismic isolation member 513 into pressure contact with the floor F when the operating member 511 is pushed down. The swing end 14A of the swing member 14 constituting the swing mechanism 15 is mounted on the upper end surface 511A of the operating member 511.

Therefore, when the seismic isolation device 502 is operated, when the operation pedals 41 (operation pedals 461 and 481) are pushed down from the upper horizontal position, the shaft member 40 (440) is rotated and the rocking member 14 is shaken. When the moving end 14A presses the upper end surface 511A of the operating member 511 and an external force is applied to overcome the urging force of the first spring 525, the operating member 511 is displaced downward. Then, when the operation pedals 41 (operation pedals 461 and 481) are further pushed down and held or locked at the ground contact position by the holding mechanism 8 or the lock mechanism 408, the operating member 511 reaches the lower ground contact position and is a seismic isolation member. The 513 is pressed against the floor F by the second spring 527. Therefore, even if a shaking force is applied to the furniture 503 due to an earthquake or the like, the furniture 503 does not slip or fall, and the safety is improved. Moreover, since the grounding device 506 of the seismic isolation device 502 is incorporated in the caster 505 and provided integrally, the number of parts can be reduced. As described above, since it is not necessary to provide the caster 505 with a turning lock mechanism or a wheel lock mechanism, the structure of the caster can be simplified and the cost can be reduced.

2 Seismic isolation device 3 Furniture (attached body)
6 Grounding device 7 Operation mechanism 8 Holding mechanism

Claims (18)

A grounding device provided on the attached body, the operating member having an elastic grounding portion provided at the lower end and capable of moving up and down, and a first urging member for urging the operating member upward. A swing member is provided which is connected to the operating member and can press the upper end of the operating member in response to a grounding operation on the operating member and push down the grounding portion from an upper non-grounding position to a lower grounding position. A grounding device with a swing mechanism and
It is provided with a holding mechanism for holding the grounding portion at an upper non-grounding position and a lower grounding position , respectively.
The holding mechanism holds the swinging member at an upper position corresponding to a non-grounding position above the grounding portion and a lower position corresponding to a grounding position below the grounding portion, thereby grounding the grounding member. A seismic isolation device characterized in that the portion is held at an upper non-grounded position and a lower grounded position, respectively. A grounding device provided on the attached body and having an elastic grounding portion that can move up and down is connected to the grounding portion of the grounding device so that an external force can be transmitted, and the operating member is displaced to place the grounding portion on the floor. It is provided with an operating mechanism for bringing it into contact with each other and a holding mechanism for holding the grounded portion at an upper non-grounded position and a lower grounded position according to the displacement of the operating member .
The grounding device includes a support member attached to the attached body bottom, with passed fitted vertically movably to prevent falling off the supporting member, the operation member on which the ground portion is provided on a lower end, said support It is provided with a swing mechanism that is pivotally supported by the member and has a swing member that moves the operating member up and down.
Said operating mechanism comprises a shaft member connected to said rocking member on the same axis, the operating member, characterized in that the turning operation of the shaft member is connected via a holding mechanism to the shaft member the seismic isolation devices you. The seismic isolation device according to claim 2, wherein the swing mechanism is such that the swing end of the swing member is engaged with the operating member. In the swing mechanism, the swing end of the swing member is placed on the upper end of the motion member, and the motion member is constantly urged upward between the motion member and the support member. The seismic isolation device according to claim 2, further comprising the urging member of 1. The exemption according to any one of claims 2 to 4, wherein a second urging member for urging the grounding portion downward is provided between the operating member and the grounding portion. Seismic isolation device. The holding mechanism is fitted to a mounting member that is mounted on the bottom surface of the body to be mounted and supports one end of the shaft member, and one end of the shaft member housed in the mounting member, and one end is connected to the operating member. An engaging member having a recessed portion formed at a different circumferential position with respect to the shaft member at the outer edge portion of the other end, and a slit formed in the mounting member, advancing and retreating facing the outer edge portion of the other end. The exemption according to any one of claims 2 to 5, wherein the lock pin is movably inserted and the lock pin is provided with a spring for urging the lock pin toward the outer edge of the other end. Seismic isolation device. The holding mechanism is configured to lock the operating member at a predetermined position when the operating member is pressed in one direction to hold the grounding device in the grounded state, and unlock the operating member when pressed. The seismic isolation device according to claim 6 , further comprising a lock mechanism including an unlocking operation member that returns the grounding device to the original position and puts the grounding device in a non-grounded state. The engaging member is formed so that the upper concave portion is curved so that the opening is widened.
The lower recess is formed so as to be inclined with almost the same width as the lock pin, and is formed in a recess that is shallow so that almost half of the entire circumference of the lock pin comes into contact with each other.
A convex portion having an arcuate tip is formed between the upper concave portion and the lower concave portion.
When the operating member is pushed downward from the non-grounded position and tilted, the lock pin is retracted against the urging force of the spring, the operating member reaches the grounding position at a predetermined tilt angle, and the slot and the slot match. The seismic isolation device according to claim 7, wherein the lock pin is introduced into the slotted hole to lock the operating member. The unlocking operation member includes a rotating portion that is fitted to one end of the shaft member so as to be relatively rotatable, and an unlocking operating portion that extends outward from the rotating portion and projects outward from the attached body. It is configured to include a bent portion that extends inward from the rotating portion and abuts on the lock pin.
The seismic isolation device according to claim 8, wherein when the unlocking operation portion is pressed in one direction, the lock pin is retracted against the urging force of the spring and is disengaged from the lower recessed portion of the engaging member. .. The claim is characterized in that a pair of grounding devices are provided at the outer edge corners of the mounted body, and the operating members are composed of a single operating member that connects the engaging members of the holding mechanisms corresponding to the grounding devices. The seismic isolation device according to any one of 6 to 9. At the outer edge corner of the attached body, another grounding device is provided on the side facing the pair of grounding devices so as to face each other at an equal distance from the pair of grounding devices.
In addition to projecting the shaft member from the mounting member of these other grounding devices,
The seismic isolation device according to claim 10, wherein a transmission mechanism in which a shaft member of a pair of grounding devices and a shaft member of another grounding device are connected so as to be able to transmit an external force is provided in different rows. The seismic isolation device according to any one of claims 1 to 11, wherein the attached body is provided with legs or casters for ensuring a gap between the bottom surface of the attached body and the floor. The seismic isolation device according to claim 12, wherein the operating member is provided on the same shaft core as the swivel shaft of the caster. It is provided with a caster body that is rotatably attached to the body to be attached via a support member and has a slewing shaft, and wheels that are rotatably supported by the caster body.
A grounding device provided on the attached body, the grounding portion having elasticity on the same axis as the swivel shaft is provided at the lower end and can move up and down, and the operating member is urged upward. The first urging member to be connected to the operating member, the upper end of the operating member is pressed in response to the grounding operation on the operating member, and the grounding portion is pushed down from the upper non-grounding position to the lower grounding position. A grounding device provided with a swinging mechanism provided with a swinging member capable of enabling the swinging member, and a holding mechanism for holding the grounding portion at an upper non-grounding position and a lower grounding position, respectively. By holding the grounding portion at an upper position corresponding to the non-grounding position above the grounding portion and a lower position corresponding to the grounding position below the grounding portion, the grounding portion is held at the upper non-grounding position and the lower portion, respectively. A caster equipped with a seismic isolation device, which is provided with a seismic isolation device having a holding mechanism for holding each of the grounding positions. It is provided with a caster body that is rotatably attached to the body to be attached via a support member and has a slewing shaft, and wheels that are rotatably supported by the caster body.
A grounding device equipped with an elastic grounding part that can move up and down on the same axis as the swivel shaft.
An operation mechanism that is connected to the grounding part of this grounding device so that an external force can be transmitted and displaces the operating member to bring the grounding part into contact with the floor.
The seismic isolation device is provided with a seismic isolation device having a holding mechanism for holding the ground contact portion at an upper non-grounded position and a lower grounded position according to the displacement of the operating member .
The ground apparatus, the upper end is protruded by preventing falling off the support member, slidably fitted passed through the pivot axis, and the operation member on which the ground portion is attached to the lower end, swinging on the support member It is provided with a swing mechanism that is pivotally supported and has a swing member that moves the moving member up and down.
Operating mechanism comprises a shaft member connected to said rocking member on the same axis, the operating member includes a feature that the rotating operation of the shaft member is connected via a holding mechanism to the shaft member caster equipped with the seismic isolation devices you. The caster provided with the seismic isolation device according to claim 15 , further comprising the swing mechanism according to claim 3 or 4. The caster provided with the seismic isolation device according to claim 16 , further comprising the second urging member according to claim 5. The caster provided with the seismic isolation device according to any one of claims 15 to 17 , wherein the holding mechanism is the holding mechanism according to any one of claims 6 to 9.

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