JP2017077837A - Caster operation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a caster operation device capable of improving safety of a bedside table.SOLUTION: A lock mechanism 40 of a caster 5 is provided on furniture, and an operation device 2 of a caster performs on/off operation of lock by displacing an operation member 11 connected to the lock mechanism 40. The operation device 2 of the caster comprises a failsafe mechanism 50 for holding the operation member 11 at a lock position always to regulate the displacement, allowing displacement to a lock release position when the operation member 11 is displaced against regulation, by an operation of a user, and returning the operation member 11 to a lock position when an operation force of the user vanishes. The operation member 11 is held at the lock release position by a stopper, and displacement from the lock release position is regulated.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a caster operating device that locks or unlocks casters provided on furniture, bedding, floor-tops, and the like.

  In general, a floor head stand arranged in the vicinity of a hospital bed is provided with a caster operating device that selectively operates casters provided at the four corners at the bottom in a locked state and an unlocked state. The caster operating device is connected to the caster lock mechanism via an operation transmitting member such as a wire, and is provided in a place where the floor head stand is easy to operate and is easy to see.

  In such a conventional caster operating device, a frame body is provided on the upper edge of the side plate of the floor head base, and the handle portion is attached to the frame body so that the handle portion can be pulled upward, and when the rotation lock of the wheel is released, The handle portion is pulled upward to protrude, and the lock member of the release maintaining mechanism is locked to the handle portion by a spring to maintain the unlocked state, and the lock release button is protruded upward by this lock member. . When locking the rotation of the wheel, push down the unlock button to unlock the handle, push the handle down and place it inside the frame, and hold the handle while holding the The handle portion and the unlock button that are pushed down by sliding are covered (for example, see Patent Document 1).

JP 2010-88490 A

  However, in the caster operation device disclosed in Patent Document 1, when unlocking the caster, first, the operation unit cover is slid to expose the handle unit and the lock release button, and the handle unit is pulled up by an external force. When the lock member of the release maintaining mechanism is engaged with the handle portion, the unlocked state is maintained. For this reason, at the time of release, two operations of sliding the operation unit cover and pulling up the handle unit are required, and there is a problem that the operation becomes complicated. In addition, since the handle portion is hidden when the wheel is locked, there is a problem that when operating for the first time, it is confusing how to operate to release. Furthermore, since the handle is locked at the unlock position of the wheel and the displacement is restricted, the floor lock remains unlocked at all times unless the wheel is locked from this state. If you touch the floor head without touching it, there is a risk of the floor head suddenly moving, which is a safety issue. In addition, when the wheel is unlocked, the handle portion protrudes upward, and thus there is a problem that it becomes an obstacle when a television or daily necessities are placed on the floor head.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a caster operating device that has high safety, good operability, and can be used effectively without obstructing the use space. .

  A caster operating device according to claim 1 of the present invention is a caster operating device that is connected to a caster locking mechanism provided on a mounted body and that displaces the operating member to perform an on / off operation of the lock. Is always held in the lock position to restrict the displacement, and when the operating member is displaced against the restriction by an external force, the displacement to the unlocking position is allowed, and when the external force is lost, the operating member is returned to the locked position. The present invention is characterized by providing fail-safe means.

  In the caster operating device according to claim 1 of the present invention, the caster is unlocked only when the user displaces the operating member to the unlock position by hand, and the user can operate the caster. When the hand is released from the member, it immediately returns to the locked position, so that the wheel can always be kept in a safe locked state. For this reason, it will not be in a lock release state by forgetting to operate.

  In the caster operating device according to claim 2 of the present invention, the fail-safe means is provided so as to be displaceable in the lock mechanism, and locks the caster at one of the upper and lower lock positions, and releases the lock at the other unlock position. A lock operation member, a first spring for elastically urging the lock operation member to the lock position, a frame provided in the mounted body and accommodating the operation member in a vertically movable manner, and a lower end of the lock mechanism The lock operation member includes an operation transmission member having an upper end connected to the operation member.

  In the caster operating device according to claim 2 of the present invention, the operation member is connected to the lock operating member via the operation transmitting member by the above configuration, and the lock operating member is always operated by the first spring. Since the spring is biased to the lock position, the operating member remains in the lock position and is restricted unless it receives an external force against the spring force of the first spring. Since the operation member is accommodated inside the frame so as to be movable up and down, it does not protrude upward from the frame.

  In the caster operating device according to claim 3 of the present invention, when the operating member reaches the unlocked position, the displacement of the operating member is regulated by an external force, and when the regulating of the operating member at the unlocked position is released by the external force, An operation member restricting means for allowing the displacement of the member is provided.

  In the caster operating device according to claim 3 of the present invention, with the above configuration, when the user displaces the operating member to the caster unlocking position by hand, the user manually operates the operating member regulating means. When operated, the displacement of the operating member can be restricted at the unlocked position, and the unlocked state can be maintained. When returning to the locked state, when the user manually operates the operating member restricting means to cancel the restriction on the displacement of the operating member, the operating member returns to the locked position and enters the locked state. For this reason, the user can arbitrarily enter the unlocked state.

  In the caster operating device according to a fourth aspect of the present invention, the operating member restricting means includes a locking portion formed at the top of the operating member with the tip projecting in the lateral direction, and the upper portion of the frame penetrating vertically. Characterized in that it is provided with a stopper that is provided slidably in the direction and is formed with a knob portion exposed on the upper surface of the frame body and a receiving portion capable of receiving the locking portion inside the upper portion of the frame body. To do.

  In the caster operating device according to claim 4 of the present invention, with the above configuration, when the user pushes up the operating member to the upper unlocking position and slides the knob portion of the stopper toward the locking portion. The receiving portion of the stopper is locked to the locking portion, the operation member is restricted from being displaced downward, and the unlocked state is maintained. When the user returns the knob portion of the stopper, the restriction of the operation member is released, the lock member returns to the locked position, and the locked state is established. For this reason, when the operating member is displaced to the unlocking position, it can be kept in the unlocked state or temporarily unlocked depending on whether or not the stopper is operated.

  In the caster operating device according to claim 5 of the present invention, the operating member regulating means is displaced from the lower locked position to the upper unlocked position against the elastic force of the first spring by the external force. Then, the displacement of the operation member is restricted at the unlocking position.

  In the caster operating device according to claim 5 of the present invention, the above configuration allows the user to simply push up the operating member to the upper unlocking position against the elastic force of the first spring. The displacement of the operating member is restricted at the position, and the unlocked state of the caster is maintained. When in the unlocked state, the user operates the operating member restricting means to apply an external force, the restriction of the displacement of the operating member is released at the unlocked position, and the operating member returns to the locked position and enters the locked state. .

  In the caster operating device according to claim 6 of the present invention, the stopper receiving portion is constituted by a step portion on which the locking portion can be placed, and the lower end surface of the step portion is inclined to slide the protruding end of the locking portion. An inclined portion that is brought into contact with the stepped portion is provided, and a second spring that urges the stopper in the lateral direction is provided between the stopper and the frame body.

  In the caster operating device according to claim 6 of the present invention, with the above configuration, when the user pushes up the operating member to the upper unlocking position, the locking portion slides on the inclined portion to the stepped portion. The guided operation member is restricted from being displaced downward. When the user returns the stopper against the urging force of the second spring, the engaging portion is detached from the stepped portion, and the operation member returns to the locked position and enters the locked state.

  In the caster operating device according to the seventh aspect of the present invention, the step portion is constituted by a recessed portion having an arcuate cross section capable of receiving the engaging portion, and the lower side surface of the recessed portion is continuously curved and locked to the recessed portion. A curved portion is provided in which the protruding end of the portion is slidably brought into contact with the recessed portion.

  In the caster operating device according to claim 7 of the present invention, with the above-described configuration, when the user pushes up the operating member to the upper unlocking position, the locking portion slides on the curved portion into the recessed portion. The guided operation member is restricted from being displaced downward. When the user returns the stopper against the urging force of the second spring or pulls down the operating member against the urging force of the second spring, the locking portion is released from the recessed portion, and the operating member Returns to the locked position and enters the locked state.

  The caster operating device according to claim 8 of the present invention is characterized in that the first spring is provided in at least one of the lock mechanism or between the frame and the operating member.

  In the caster operating device according to claim 8 of the present invention, the above configuration increases the degree of freedom of the arrangement space of the first spring, thereby increasing the degree of freedom of design.

  The caster operating device according to claim 9 of the present invention is characterized in that an opening is formed in the frame, and the operating portion of the operating member is constituted by a recess or a protrusion exposed to the outside from the opening. It is what.

  In the caster operating device according to claim 9 of the present invention, the above-described configuration allows the operating member to be operated without projecting from the frame, thereby avoiding interference with the mounted object.

  In the caster operating device according to the tenth aspect of the present invention, at least one of the upper and lower sides of the operating portion of the operating member is provided with a display portion indicating a locked state or an unlocked state, Either one of the lock release positions is displayed.

  In the caster operating device according to claim 10 of the present invention, the above configuration allows the user to know at a glance whether the locked state or the unlocked state, and can be used safely.

  According to an eleventh aspect of the present invention, there is provided a caster operating device comprising: a frame body having a L-shaped cross section; and a guide groove formed on the inner side of the frame facing the left and right sides of the opening. The guide member is provided with protrusions that can be fitted in the guide grooves of the guide side wall on both sides of the operation member, and the operation member is mounted between the guide side walls so as to be movable up and down. It is what.

  In the caster operating device according to the eleventh aspect of the present invention, by adopting the above-described configuration, it is possible to reduce the thickness of the frame body that accommodates the operating member, thereby achieving compactness.

  A caster operating device according to a twelfth aspect of the present invention is characterized in that the frame is attached to an accommodating portion formed by recessing a part of the attached body.

  In the caster operating device according to the twelfth aspect of the present invention, since the frame is configured as described above, the frame body is integrally attached to the attached body, so that the compactness can be achieved.

  In the caster operating device according to claim 13 of the present invention, the caster lock mechanism is a lock mechanism of a plurality of casters for locking the plurality of casters attached to the mounted body, and is provided at a corner of the bottom surface of the mounted body. The brake rod is accommodated in a caster body that is disposed and pivotably mounted on the mounted body, and the caster body on which the wheel is rotatably supported. The upper end protrudes outside, and the brake rod is displaced. Caster lock means for locking or unlocking at least one of the turning of the caster or the rotation of the wheel by swinging the lock member, and the mounting member arranged at the front and rear, respectively, and the shaft center is the same and can be rotated freely Each shaft provided with one end of the lock operation member attached to one side and attached with one end is attached to each shaft, and the swing end is attached to the brake rod. An actuating arm that contacts and operates the brake rod; and a transmission link that connects different shafts and transmits the rotation of one shaft to the other shaft in the same direction. And interlocking means for transmitting to the brake rod.

  In the caster operating device according to the thirteenth aspect of the present invention, with the above configuration, all casters can be locked and unlocked at the same time. For this reason, the locking is surely performed at the time of locking.

  A caster operating device according to a fourteenth aspect of the present invention is a caster operating device that is connected to a caster lock mechanism provided on a body to be mounted and that displaces the operating member to perform an on / off operation of the lock. Is always held in the unlocked position to restrict the displacement, and when the operating member is displaced against the restriction by an external force, the displacement to the locked position is allowed, and when the external force is lost, the operating member is moved to the unlocked position. Temporary locking means for returning is provided.

  In the caster operating device according to the fourteenth aspect of the present invention, the above-described configuration makes it possible to always obtain the unlocked state according to the use of the mounted body, and to temporarily hold the locked state only when necessary. Can improve versatility.

  A caster operating device according to the present invention is a caster operating device that is connected to a caster locking mechanism provided on a mounted body and that displaces an operating member to perform an on / off operation of the lock. Fail-safe means for holding the position and restricting the displacement, allowing the operation member to move to the unlocking position when the operation member is displaced against the restriction by an external force, and returning the operation member to the lock position when the external force is lost Therefore, there is no unlocking state due to forgetting to operate, and safety is improved.

FIG. 1 is an overall perspective view showing a floor head table provided with a caster operating device according to a first embodiment of the present invention. FIG. 2 is an explanatory view showing the connection between the caster operating device of FIG. 1 and the caster lock mechanism. FIGS. 3A and 3B are cross-sectional views showing a lock mechanism of a caster when unlocking and when locking, respectively. FIG. 4 is a side view showing a locking member of the caster operating device. FIG. 5 is an explanatory diagram showing a state in which the caster operating device is attached to the floor head. FIG. 6 is an explanatory view of the caster operating device as seen from the back side. FIG. 7 is a perspective view showing a connection portion of the operation member. FIGS. 8A and 8B are perspective views showing the front surface side and the back surface side of the frame body of the operating device for casters, respectively. FIGS. 9A and 9B are perspective views showing the front side and the back side of the operating member of the operating device for casters, respectively. FIGS. 10A and 10B are perspective views each showing a knob portion of the stopper. 11A and 11B are perspective views showing the stopper main body, respectively. FIG. 12 is a perspective view of the frame and the operating member of the caster operating device as seen from the back side. FIGS. 13A to 13C are perspective views showing a state in which the operation member of the caster operating device is restricted to the caster lock position, and the operation member is held at the lock release position of the caster by an external force. And a perspective view showing a state when the operation member is not locked by the stopper, and the operation member is in the unlocking position of the caster, and the operation member is locked by the stopper and displacement is restricted at the unlocking position of the caster. It is a perspective view which shows a state when there is. FIG. 14 is an explanatory view of the attachment member provided with the lock operation member as viewed from below. FIG. 15: is a perspective view which shows the principal part of the operating device of the caster based on the 2nd Embodiment of this invention. FIG. 16: is sectional drawing which shows the principal part of the operating device of the caster concerning the 3rd Embodiment of this invention. FIGS. 17A and 17B are cross-sectional views showing the main part of a caster operating device according to the fourth embodiment of the present invention.

  A caster operating device that is connected to a caster lock mechanism provided on a body to be mounted and performs an on / off operation of the lock by displacing the operating member for the purpose of improving the safety of the floor head. When the operation member is displaced against the restriction by an external force, the displacement to the unlocking position is allowed, and when the external force is lost, the operation member is returned to the lock position. Realized by providing a fail-safe mechanism.

  A caster operating device 2 according to a first embodiment of the present invention will be described below with reference to FIGS.

  As shown in FIGS. 1 and 2, the caster operating device 2 according to the first embodiment of the present invention is used for furniture (attachment body) 3 such as a carriage or a floor-mounted base used in hospitals or facilities. Provided. The casters 5 (5A to 5D) are attached to the four corners of the bottom portion 4 of the furniture 3 so as to be pivotable by retreating inward via attachment members 6 (6FR, 6FL, 6RR, 6RL, see FIG. 2). The attachment members 6 are attached in pairs to the front and rear sides of the bottom portion 4 in the traveling direction. The attachment members 6FR, 6FL and 6RR, 6RL arranged in pairs in the front-rear direction are arranged to face each other in the left-right direction and the front-rear direction.

  As shown in FIGS. 3A and 3B and FIG. 4, the caster 5 is provided with a caster lock mechanism (lock mechanism) 40 for locking and unlocking the wheel lock. The caster operating device 2 is connected to the lock operating member 21 of the caster lock mechanism 40 via an operation transmitting rod (operation transmitting member) 7, and the user operates the caster operating device 2 to release the lock. When the operation is performed, the force (external force) by the operation is transmitted to the lock mechanism 40 of the caster through the operation transmission rod 7 and the lock operation member 21. The lock mechanism 40 always holds the caster in a locked state by a lock spring (first spring) 22 described later, and the lock operation member 21 is biased at the lock position. When the lock operation member 21 is forcibly displaced by an external force that resists the urging force of the lock spring 22, the rocking end is displaced upward and is held at the unlocked position.

  As shown in FIGS. 5 to 8, the caster operating device 2 includes a frame body 10 attached to a recessed portion (accommodating portion) 3 </ b> B formed by being recessed in the side plate 3 </ b> A of the furniture 3, and the frame body 10. And an operation member 11 which is accommodated so as to be movable up and down and is connected to the upper end of the operation transmission rod 7. As shown in FIGS. 8A and 8B, the synthetic resin frame 10 includes a frame body 12 having an inverted L-shaped cross section and an opening 13 formed therein, and an inner side of the frame body 12. Guide side walls 15A and 15B provided on the left and right sides of the opening 13 so as to face each other and formed with vertical guide grooves 14A and 14B. Each of the guide grooves 14A and 14B is provided at two locations in the vertical direction. The opening 13 is formed in a rectangular shape at the center of the side wall 12 </ b> A of the frame body 12. In the upper part 12B of the frame body 12, a slit 16 penetrating vertically is formed in the longitudinal direction.

  As shown in FIG. 6, a stopper 30 as an operation member restricting means is slidably attached to the slit 16. The stopper 30 is inserted with the foot 32 (see FIGS. 10A and 10B) of the knob 31 from above the slit 16, and the stopper body 33 is screwed to the foot 32 below the upper frame body 12B. It comes to be connected with. As shown in FIGS. 11A and 11B, the stopper main body 33 has a stepped portion (receiving portion) 34 on the operation member 11 side (center side). When the knob 30 is slid laterally (left and right) along the slit 16 at the upper portion 12B of the frame main body 12, the stopper main body 33 moves integrally, and the stopper main body 33 moves to the center side. When the bent portion 23 of the operating member 11 hits the stepped portion 34 and the user releases the hand from the operating member 11, the bent portion 23 is placed on the stepped portion 34 and restricts the operating member 11 from being displaced downward. It is like that. That is, when the operation member 11 is pulled up to the upper unlock position by the user, the stopper 30 slides the knob 31 with one hand toward the center while holding the operation member 11 in the unlock position. When the stopper main body 33 is locked to the operation member 11, the downward displacement of the operation member 11 is restricted so as not to return to the lower lock position. When the caster is returned from the unlocked state to the locked state, the knob 31 is returned to the original position, and when the operation member 11 and the stopper main body 33 are unlocked, the operation member 11 is moved to the lock spring 22. To return to the locked position.

  When the stopper 30 is moved to the center side by the knob 31 and is engaged with the operation member 11, the position of the knob 31 remains in the unlocked state on the upper frame body 12 </ b> B. The indication “Keep unlock” is shown on the center side. On the other hand, when the stopper 30 is moved outward (to the left and right ends) by the knob 31 and the engagement with the operation member 11 is released, the operation member 11 returns to the lock position. The indication “return to lock” indicating that the position of the knob 31 has returned to the locked state is marked on the outside.

  Thus, the caster operating device 2 according to the present embodiment includes the fail-safe mechanism (fail-safe means) 50. The fail-safe mechanism 50 transmits the operation force from the operation member 11 to the lock operation member 21 and the lock spring 22 that constantly urges the lock operation member 21 to the lock position so that the lock mechanism 40 is always locked. The operation transmission rod 7 that connects the operation member 11 and the lock operation member 21 up and down as much as possible and holds the operation member 11 in the locked position always below by the lock spring 22 and the lock spring 22 by the user. When it is lifted upward against the urging force, it is released from the lower locked position, and the unlocked state is maintained as long as the lifting force by the user continues to be applied, and the user releases the hand or engages with the stopper 30. When unlocked, the operating member 11 is returned to the original lower locking position and the displacement is restricted by the locking spring 22.

  As shown in FIGS. 9A and 9B, the operation member 11 is composed of a synthetic resin box-shaped main body, and the surface of the box-shaped main body is recessed in the left-right direction so that a finger can be inserted. An operation unit 17 is formed. On the upper side of the operation unit 17, a display unit 18 is formed, and a character "release" meaning unlocking and a symbol of an arrow pointing up are displayed (see the upper display unit 18A).

  As shown in FIGS. 13A to 13C, when the operation member 11 is locked by the stopper 30 and the displacement is restricted at the upper unlocking position, the display unit 18 is moved to the operation unit 17. The upper display portion 18Aa has an “unlocked” character and “up” symbol, and the lower display portion 18Ba has an “unlocked” character. Each may be displayed. Here, FIG. 13A shows a state in which the operating member 11 is in the lower locking position, and FIG. 13B shows that the operating member 11 is in the upper unlocking position and is still locked to the stopper 30. FIG. 13C shows a state where the operation member 11 is at the upper unlocking position and is locked to the stopper 30.

  A pair of ribs 21A and 21B are formed on the back side of the box-shaped main body along the vertical direction. At the upper end of one rib 21B, a bent portion (locking portion) 23 is formed that is bent in the lateral direction toward the opposite side wall portion 19B. The bent portion 23 is locked to the step portion 34 of the stopper 30. The upper end of the other rib 21A is connected to the upper end of the other side wall 19A.

  As shown in FIGS. 6 and 7, a connection portion 24 connected to the operation transmission rod 7 is formed below the other rib 21 </ b> A of the operation member 11. The connecting portion 24 is formed with a protruding portion 25 below the other rib 21A. A circular hole 7 </ b> A drilled in the upper end of the operation transmission rod 7 is fitted into the protruding portion 25. In the box-shaped main body, lateral ribs 21C are formed on the left and right sides of the projecting portion 25, and a bottom portion 26 is formed below the lateral rib 21C. The bottom portion 26 is connected by connecting the lower ends of both side wall portions 19A and 19B and the lower end of one rib 21B. In one of these ribs 21 </ b> A, the lateral rib 21 </ b> C, and the bottom 26, when the circular hole 7 </ b> A of the operation transmission rod 7 is inserted into the projecting portion 25, a gap S is formed to accommodate the upper end portion 7 </ b> B of the operation transmission rod 7. A gripping portion 27 that grips the upper end portion 7 </ b> B of the operation transmission rod 7 housed in the gap S is provided below the bottom portion 26. The grip portion 27 is formed below the bottom portion 26 and is formed so as to surround a pair of claw portions 28A and 28B that grip and support both sides of the operation transmission rod 7 and the claw portions 28A and 28B. And a restricting arm 29 for restricting the displacement in the direction within a predetermined allowable range. When the operation transmission rod 7 is inserted into the projecting portion 25 in the gap S and is gripped by the claw portions 28A, 28B, the claw portions 28A, 28B are elastic according to the lateral displacement of the operation transmission rod 7. Although displaced, the displacement in the lateral direction is regulated within a predetermined range by the regulating arm 29, and the dropout is prevented. Moreover, since the holding part 27 is comprised in this way, the rod which changed length according to the height by which the operation transmission rod 7 is arrange | positioned can be used for the operation transmission rod 7. FIG. ing.

  Side walls 19A and 19B facing the guide side walls 15A and 15B of the frame body 10 are formed on both the left and right sides of the box-shaped main body, as shown in FIGS. Guide protrusions 20A and 20B are provided on the outer surfaces of the side walls 19A and 19B, respectively, and are fitted into the upper and lower guide grooves 14A and 14B of the guide side walls 15A and 15B. When the guide protrusions 20A and 20B are fitted in the guide grooves 14A and 14B and are attached to the frame main body 12, the operation member 11 can be moved up and down from the opening 13 of the frame main body 12 to the operation part 17 and the display part 18, respectively. One of the display portions 18A and 18B is exposed (see FIG. 5).

  In other words, when the lock mechanism 40 is in the locked state and the operation member 11 is in the lower locked position, the operation unit 17 that is recessed below the opening 13 has a character “release” on the upper display unit 18A. An arrow symbol pointing upwards appears (see FIG. 13A). When the user inserts a finger into the operation unit 17 and pushes the operation member 11 upward against the urging force of the locking spring 22, the display on the upper display unit 18 </ b> A is hidden from the opening 13. (See FIG. 13B). At this time, when the stopper 30 is slid to cause the stepped portion 34 to stop at the bent portion 23 of the operation member 11 and the user releases the finger from the operation portion 17, the bent portion 23 is placed on the stepped portion 34. The Then, the operation member 11 is restricted from being displaced downward and is held at the unlocked position (see FIG. 13C). For this reason, the lock operation member 21 interlocked with the operation transmission rod 7 is pushed up from the biased lock position to the upper lock release position, and the lock mechanism 40 is in a state where the caster is unlocked. When the operation member 11 is held at the upper unlock position, the operation unit 17 appears on the upper side of the opening 13, and the lower display unit 18B (18Ba) appears on the lower side. Therefore, the user can determine whether the caster is in the locked state or the unlocked state simply by looking at the display of the opening 13.

  In this embodiment, the operation member 11 is held at the unlocked position using the stopper 30 and the display portions 18A and 18B are formed on the upper and lower sides of the operation portion 17 of the operation member 11, respectively. If the user pulls the operating member 11 upward and displaces it against the restriction by the locking spring 22 without using the stopper 30, the displacement to the upper unlocking position is allowed. When the user releases his / her hand from the operation member 11 and the external force is lost to the operation member 11, the operation member 11 can be returned to the lock position by the lock spring 22. In this case, only the upper display portion 18A indicating unlocking may be formed. In the present embodiment, the operation member 11 is formed by recessing the operation portion 17 so that a finger can be inserted. However, the operation member 11 is not limited to this. You may make it operate in the opening part 13. FIG.

  Next, the caster locking mechanism 40 of the caster operating device 2 according to the present embodiment will be described. The caster locking mechanism 40 includes a braking mechanism 60 provided for each of the casters 5 (5A to 5D) and a braking force transmission mechanism 70 that transmits an external force from the operation member 11 to the braking mechanism 60. .

  The caster 5 is a twin-wheel type caster, and as shown in FIGS. 3 and 4, a pair of wheels 42, 42 are rotatably supported on the left and right sides of the caster body 41 via an axle 43. . The caster main body 41 is formed with a through hole 44 penetrating vertically at a position eccentric to the front side in the traveling direction from the axle 43, and a turning shaft 45 is rotatably fitted in the through hole 44. A screw part 45A is formed on the upper part of the turning shaft 45, and a flange part 46 for rotating the turning shaft 45 is provided on the lower side thereof. The lower end of the pivot shaft 45 protrudes from the lower opening of the through hole 44 of the caster body 41, and a pin 47 is press-fitted into the small-diameter portion 45 </ b> B of the pivot shaft 45 to prevent the caster body 41 from coming off. The left and right wheels 42, 42 are formed such that inner surfaces are recessed in an annular shape, and an uneven portion 48 is formed along the outer peripheral surface of the annular recessed portion.

  The turning shaft 45 is attached to the attachment member 6. As shown in FIGS. 2 to 4 and 14, the mounting member 6 has a U-shaped main body having a bottom portion 6A and left and right walls 6B and 6C rising from the left and right sides of the bottom portion 6A, and upper ends of the walls 6B and 6C. And a bent portion 6E that is formed by bending outward to the bottom 4 of the furniture 3 and has a mounting hole 6D. As for the attachment member 6, the bending part 6E is attached to the bottom part 4 of the furniture 3 with a screw. A circular hole 6H is formed in the bottom portion 6A of the attachment member 6, and the screw portion 45A of the turning shaft 45 is screwed together. In the left and right walls 6B and 6C, through-holes 6G and 6G are formed on the rear side in the traveling direction from the circular hole 6H. The caster 5 is attached to the attachment member 6 by screwing the screw portion 45A of the pivot shaft 45 into the circular hole 6H. For this reason, when the attachment member 6 is attached to the bottom portion 4 of the furniture 3, the caster 5 rotates with respect to the attachment member 6. Thus, the casters 5 are attached to the four corners of the bottom 4 of the furniture 3 via the attachment members 6FR, 6FL, 6RR, 6RL.

  As shown in FIGS. 3A and 3B, the braking mechanism 60 constituting the caster locking mechanism 40 is a vertical hole having a circular cross section that passes through the turning shaft 45 vertically on the same axis as the shaft. The brake rod 51 is inserted into the vertical hole so as to be movable up and down. The upper portion of the brake rod 51 is exposed by protruding from the upper end opening of the vertical hole, and a disc-shaped first contact member 52 is attached in the vicinity of the upper end. Below the first contact member 52, the swing end of the operating arm 53 is loosely fitted to the brake rod 51 through the through hole 54. The other end of the operating arm 53 is attached to the front side shaft 61, and the other end of the lock operation member 21 is also attached to the shaft 61. For this reason, the operation arm 53 is integrally interlocked according to the swing of the lock operation member 21. That is, when the rocking end of the lock operation member 21 is pulled upward by the operation transmission rod 7 and rocks, the front shaft 61 rotates, and the rocking end of the operating arm 53 moves with the rotation of the front shaft 61. When displaced upward, the brake rod 51 is lifted by coming into contact with the lower surface of the first contact member 52 (see FIG. 3A).

  The lower part of the brake rod 51 protrudes from the opening at the lower end of the vertical hole of the turning shaft 45, and a disc-shaped second contact member 55 is provided at the protruding end. The locking spring (first spring) 22 is disposed between the second abutting member 55 and the caster body 41, and constantly biases the brake rod 51 downward ((B in FIG. 3). )reference).

  The caster body 41 is provided with a wheel lock member (lock member) 56. One end of the wheel lock member 56 is pivotally attached to the rear portion of the caster body 41 by a pin 57 so that the swing end 56A on the front side extends below the second contact member 55. The wheel lock member operating spring 58, which is disposed between the swing end 56 and has a lower biasing force than the lock spring 22, is always biased upward. On the lower side of the wheel lock member 56, a rotation stop engaging portion 59 that is detachably engaged with the circumferential uneven portion 48 of the wheels 42, 42 is provided. The rotation stop engaging portion 59 is attached at a right angle to the lower side of the arm-shaped wheel lock member 56 so as to engage with the circumferential concavo-convex portions 48 of the left and right wheels 42, 42. Thus, the brake mechanism 60 includes the brake rod 51, the lock spring 22, the second abutting member 55, the wheel lock member 56, the wheel lock member operating spring 58, the concavo-convex portion 48, and the engaging portion 59. Is done.

  The brake mechanism 60 is provided for each caster 5, the brake rod 51 is pushed downward by the elastic force of the lock spring 22, and the second contact member 55 pushes the swing end 56 </ b> A of the wheel lock member 56. When the urging force of the spring 58 is overcome and pushed downward, the rotation stop engaging portion 59 engages with the circumferential concavo-convex portion 48 of the wheel and the rotation of the wheels 42 and 42 is locked. When the braking rod 51 is pulled upward against the urging force of the locking spring 22 by an external force, the wheel lock member 56 is pushed up by the elastic force of the spring 58 and the anti-rotation engagement portion 59 is rotated around the wheel. The engagement with the direction concavo-convex portion 48 is released and the upper portion is released upward, so that the rotation lock of the wheel is released.

  As shown in FIG. 2, in the braking force transmission mechanism 70 constituting the caster lock mechanism 40, the front shaft 61 connects the left and right mounting members 6FL, 6FR to the left and right mounting members 6FL, 6FR. And it is rotatably supported by the through hole 6G via a sliding material (not shown). Of the left and right attachment members 6RL, 6RR attached to the rear side of the bottom portion 4, the right attachment member 6RR is provided with a shaft 62A, and the left attachment member 6RL is provided with a shaft 62B. The through hole 6G is rotatably supported via a sliding material that does not. These rear shafts 62A and 62B are arranged with their axes aligned with each other.

  The inner ends 62Aa and 62Ba of the rear shafts 62A and 62B project inward from the attachment members 6RL and 6RR, respectively. The front-side shaft 61 and the rear-side shafts 62A and 62B are arranged with their axial centers facing in the left-right direction. That is, both the shafts 62A and 62B having the same axial center on the rear side are arranged in parallel to the shaft 61 on the front side. Further, since these shafts 61, 62A, 62B are rotatably disposed in the through hole 6G, they are disposed on the rear side of the circular holes 6H formed in the attachment members 6FL, 6FR, 6RL, 6RR. That is, the brake rod 51 protruding upward from the pivot shaft 45 of the caster body 41 is arranged on the front side with respect to the respective shafts 61, 62A, 62B. The shafts 61, 62 </ b> A, and 62 </ b> B may have a round bar shape with a circular cross section or a square bar shape with a square cross section as long as a predetermined strength can be secured.

  The front and rear shafts 61 and 62A, 62B have a right transmission link 63 connecting the front shaft 61 and the rear right shaft 62A, and between the front shaft 61 and the rear left shaft 62B. A left transmission link 64 to be connected is provided. The left and right transmission links 63 and 64 connect the support members 63A and 64A attached to the front shaft 61 and the support members 63B and 64B attached to the rear shafts 62A and 62B, respectively. The rotating force of the front shaft 61 that is coupled by a pin and applied through the operation transmission rod 7 and the lock operation member 21 by the operation of the operation member 11 is transmitted to the rear shafts 62A and 62B in the same direction. Yes. As shown in FIG. 2, one end of the lock operation member 21 is attached to the protruding end 61 </ b> A of the front side shaft 61 that extends and protrudes outside the front side left attachment member 6 </ b> FL. As described above, the braking force transmission mechanism 70 includes the lock operation member 21, the front shaft 61, the attachment member 6 (6FL to 6RR), the operation arm 53, the transmission links 63 and 64, the support members 63A, 63B, 64A, and 64B. The rear side shafts 62A and 62B are provided.

  Next, the operation of the caster operating device 2 will be described based on the operation of the caster operating device 2 according to the present embodiment. In the caster operating device 2 according to the present embodiment, the brake rod 51 is always pushed downward by the lock spring 22 and the brake mechanism 60 is in a state of locking the wheels. At this time, the urging force of the locking spring 22 is applied to the operation member 11 accommodated in the frame 10 through the first contact member 52, the operation arm 53, the front shaft 61, the lock operation member 21, and the operation transmission rod 7. Accordingly, the operating member 11 is held at the lower locking position (see FIGS. 13A and 3B). Since the urging force of the locking spring 22 is acting on the operation member 11, the displacement is restricted. When the user looks at the operation member 11 exposed from the opening portion 13 of the frame body 12, the upper display portion 18A requires “unlocked” meaning unlocking and an upward operation is necessary for unlocking. An arrow symbol suggesting this can be recognized, and an operation unit 17 for inserting a finger is arranged below the opening 13. For this reason, the user can know that the caster 5 of the furniture 3 is in a locked state at a glance. In addition, since the operation member 11 is not only housed in the frame body 12 but also the displacement is restricted by the lock spring 22, a force is applied from the outside unless the user inserts a finger into the operation portion 17 and pulls it up. The operating member 11 will not be displaced upward by hitting or hitting anything. For this reason, the locked state is always maintained, and even if a person touches or hits the furniture 3, there is no possibility of moving, so safety is ensured.

  When the user unlocks the caster and moves the furniture 3 and moves the furniture 3 in a short time, the user inserts a finger into the operation unit 17 and pulls up the operation member 11. The caster 5 is unlocked. When the operation transmission rod 7 is pulled up by pulling the operation member 11 upward, and the rocking end of the lock operation member 21 is displaced upward and the front shaft 61 rotates in the unlocking direction, the transmission links 63 and 64 are moved. Thus, the operating force is also transmitted to the rear shafts 62A and 62B, the swinging ends of the operating arms 53 of the casters 5A to 5D swing upward and the brake rod 51 is lifted upward, and the wheel lock member 56 Is biased upward by the spring 58, and the anti-rotation engaging portion 59 is detached from the concavo-convex portion 48, and the wheels 42, 42 are unlocked (see FIG. 3A). At this time, if the user does not operate the knob 31 and remains in the “return to lock” display position outside the frame main body upper portion 12B (see FIG. 13B), the user can operate the operation unit 11 of the operation member 11. As soon as the hand 17 is released, the operating member 11 is returned to the lower locking position by the locking spring 22. For this reason, after the movement of the furniture 3 is completed, the caster 5 is locked at the same time when the user releases his / her hand, so that the user does not need to perform an operation to maintain the locked state. There is no risk of moving when touched or touched.

  When the user unlocks the caster and moves the furniture 3, it is preferable to keep the lock mechanism 40 in the unlocked state when moving the furniture 3 for a long time or a long distance. In such a case, the user inserts a finger into the operation unit 17 and pulls up the operation member 11 to be in the unlocked state, and then the user slides the knob 31 to the “unlocked holding” display side on the center side. When the stopper 30 is locked to the operation member 11 by being moved, the downward displacement of the operation member 11 is restricted and held in the unlocked position (see FIG. 13C). The user can move the furniture 3 in this state. At this time, when the operation member 11 exposed from the opening 13 of the frame body 12 is viewed, the operation unit 17 is disposed on the upper side of the opening 13, and the display unit 18Ba is being unlocked on the lower side. “Unlocking” can be recognized. For this reason, the user can know that the caster 5 of the furniture 3 is in the unlocked state at a glance. When the knob 31 is returned to the outer “return to lock” display side after the movement is completed, the engagement between the stopper 30 and the operation member 11 is released, and the operation member 11 returns to the lower locked position. Thus, by using the stopper 30, it can also be maintained in the unlocked state. As described above, the caster operating device 2 according to the present embodiment has an effect of improving safety without being unlocked due to forgetting to operate. As described above, the stopper 30 can be arbitrarily used depending on how the furniture 3 is moved.

  Next, a caster operating device 102 (see FIG. 15) according to a second embodiment of the present invention will be described. The caster operating device 102 according to the second embodiment of the present invention is provided with the stopper 30 in the caster operating device 2 according to the first embodiment, but does not include the stopper 30. Is different. That is, the caster operating device 102 according to the present embodiment has substantially the same configuration as the caster operating device 2 according to the first embodiment except for the stopper 30. As shown in FIG. 15, the caster operating device 102 includes a frame 110 attached to the furniture 3, and an operating member that is accommodated in the frame 110 so as to be movable up and down and connected to the upper end of the operation transmission rod 7. 11. The frame body 110 has a frame main body 112 having an inverted L-shaped cross section, and an upper portion 112B continuous with the vertical wall portion 112A of the frame main body 112 has a slit like the caster operating device 2 of the first embodiment. It is not provided, but is formed on a bare surface, and a member corresponding to the stopper 30 is not provided. The fail safe mechanism (fail safe means) 150 of the caster operating device 102 includes a lock spring 22 that constantly biases the lock operating member 21 to the lock position so that the lock mechanism 40 is always locked, and the operation member 11. The operation transmission rod 7 that transmits the operation force to the lock operation member 21 and keeps the operation member 11 in the lock position always below by the lock spring 22 and the user against the urging force of the lock spring 22 by the user. When the user pulls up, the unlocked state is maintained as long as the pulling force by the user continues to be applied, and the unlocked state is maintained. When the user releases the hand, the lock spring 22 returns to the original lower locking position. And the operation member 11 whose displacement is regulated by the above. For this reason, when the user releases his / her hand from the operating portion 17 of the operating member 11, the operating member 11 is immediately returned to the lower locked position by the locking spring 22. For this reason, after the movement of the furniture 3 is completed, the caster 5 is locked at the same time when the user releases his / her hand, so that the user does not need to perform an operation to maintain the locked state. There is no risk of moving when touched or touched. Therefore, it can be used safely. When configured in this way, the display unit 18 may be the upper display unit 18Aa only, and the lower display unit 18Bb may be blank, or the lower display unit may not be provided.

  Next, a caster operating device 202 (see FIG. 16) according to a third embodiment of the present invention will be described. The caster operating device 202 according to the third embodiment of the present invention is the same as the caster operating device 2 according to the first embodiment, when the operating member 11 is held at the upper unlocking position. While the stopper 30 is slid with the other hand to be locked to the operation member 11 while being lifted with one hand, the space between the stopper main body 233 of the stopper 230 and the guide side wall 15B of the frame 10 is shown. When a stopper spring (second spring) 240 is provided on the upper side and the operating member 11 is pulled upward in the unlocking direction, the stopper 230 is automatically locked, and when the stopper 230 is slid outward, the operating member 11 is returned to the original position. Except for the point that it is returned to the locked position, it has substantially the same configuration as the caster operating device 2 of the first embodiment.

  As shown in FIG. 16, in the caster operating device 202 according to this embodiment, a stopper (operation member restricting means) 230 is slidably attached to the slit 16 of the frame body upper part 12B. As for the stopper 230, the knob | pick part 231 is exposed on the upper surface of the upper part 12B, and the stopper main body 233 is arrange | positioned under the upper part 12B. A protrusion 235 is formed on the guide side wall 15B side (laterally outward) of the stopper 230, and a stopper spring 240 is mounted between the protrusion 235 and the guide side wall 15B to urge the stopper 230 toward the center. ing. An inclined guide portion (accepting portion, inclined portion) 236 is formed on the central end surface of the stopper 230 so as to rise from the bottom portion 230 </ b> A and incline toward the central side, and a step portion (receiving portion) 234 is formed on the inclined guide portion 236. It is formed continuously. The step portion 234 has a flat rectangular mounting surface and a wall surface rising from one end of the mounting surface. In other words, the caster operating device 202 has a step 234 on which the bent portion 23 can be placed and a lower surface of the step 234 that is inclined so that the protruding end of the bent portion 23 is brought into sliding contact and guided to the step 234. And a guide unit 236.

  In the caster operating device 202 according to the present embodiment, the operating member 11 is pulled up from the lower locked position toward the upper unlocked position by the user, and the edge of the bent portion 23 hits the inclined guide portion 236 for the stopper. When sliding against the biasing force of the spring 240, the stopper 230 moves backward toward the guide side wall 15 </ b> B, and when the edge of the bent portion 23 reaches the stepped portion 234, the stopper 230 is moved by the elastic force of the spring 240. Is elastically displaced toward the center, the connecting portion 237 between the step portion 234 and the inclined guide portion 236 is brought into elastic contact with one rib 21B, and the bent portion 23 is placed on the step portion. For this reason, the operation member 11 is held at the upper unlocking position. For this reason, the unlocking state can be achieved simply by pulling up the operation member 11. To make the lock state, when the knob portion 231 is slid outward, that is, when the spring 240 is slid in the compressing direction, the step portion 234 and the bent portion 23 are disengaged, and the operation member 11 is Return to the original lock position. For this reason, it can be made into a locked state only by one-touch operation of the knob | pick part 231. FIG. Thus, in the caster operating device 202 according to this embodiment, unlocking and locking can be performed by a one-touch operation.

  Next, a caster operating device 302 (see FIG. 17) according to a fourth embodiment of the present invention will be described. In the caster operating device 302 according to the fourth embodiment of the present invention, when the operating member 11 is held at the upper unlocking position in the caster operating device 202 according to the third embodiment, a stopper 230 is provided. When the operating member 11 is automatically locked and held at the unlocked position and the holding member 11 is returned to the locked position, the knob 231 is slid to the locked position. This is different in that the return to the locked position can be achieved not only by the knob portion 331 but also by depressing the operation member 11.

  That is, in the caster operating device 302 according to the fourth embodiment, as shown in FIGS. 17A and 17B, the stopper 16 (operating member regulating means) 330 is provided in the slit 16 of the upper frame body 12B. A knob 331 is exposed on the upper surface of the upper portion 12B, and a stopper main body 333 is disposed below the upper portion 12B. A protrusion 335 is formed on the guide side wall 15B side of the stopper 330, and a stopper spring 240 is mounted between the protrusion 335 and the guide side wall 15B to urge the stopper 330 toward the center.

  The caster operating device 302 according to this embodiment includes a tilt guide portion 236 formed by tilting the central side surface of the caster operating device 202 according to the third embodiment from the bottom 230A toward the center, and the tilt In contrast to the guide portion 236, which is provided with a step portion 234 having a flat placement surface and a wall surface, the central side surface of the operation device 302 of the caster is continuous from the bottom portion 330A to the central side. A curved guide portion (curved portion) 336 that curves and bulges, and an arc-shaped recessed portion 334 that is continuous with the curved guide portion 336 and can receive the bent portion 23 are configured. In other words, the caster operating device 302 has a cross-section arc-shaped recessed portion 334 capable of receiving the bent portion 23 and a lower surface of the recessed portion 334 continuously curved to the recessed portion 334, and the protruding end of the bent portion 23 is slidably contacted. And a curved guide portion that leads to the recessed portion 334.

  In the caster operating device 302 according to the present embodiment, the operating member 11 is pulled up from the lower locking position by the user toward the upper unlocking position, and the edge of the bent portion 23 hits the curved guiding portion 336 and serves as a stopper. When sliding against the biasing force of the spring 240, the stopper 330 retracts toward the guide side wall 15 </ b> B, and when the edge of the bent portion 23 reaches the recessed portion 334, the stopper 330 is moved by the elastic force of the spring 240. It is elastically displaced toward the center, and the edge of the bent portion 23 is pressed against the arcuate recess 334 in cross section. For this reason, the operation member 11 is held at the upper unlocking position. For this reason, the unlocking state can be achieved simply by pulling up the operation member 11. In order to achieve the locked state, the knob 231 is slid outward, that is, the spring 240 is slid in the compressing direction, or the operating member 11 is pushed down against the elastic force of the stopper spring 240. Then, the engagement between the recessed portion 334 and the bent portion 23 is released, and the operation member 11 returns to the original lock position. For this reason, when the knob portion 331 is operated by one-touch operation or when the operation member 11 is pushed down, it can be brought into a locked state. As described above, in the caster operating device 302 according to the present embodiment, unlocking and locking can be performed by a one-touch operation, and the lock return operation is performed through any one of the knob 331 and the operation member 11. Therefore, operability is improved.

  In the caster operating device according to the above-described embodiment, the caster is locked only by the wheel lock. However, the present invention is not limited to this, and the wheel lock and the turning lock may be performed simultaneously. In this case, a protrusion may be formed on the upper surface of the rocking end of the wheel lock member 56, and a second contact member 55 at the lower end of the brake rod 51 may be formed with a groove that engages with this protrusion. Moreover, it is good also as only a rotation lock. Further, although the lock spring (first spring) 22 is provided in the caster body 41, the present invention is not limited to this, and it may be provided between the frame body 12 and the operation member 11 or provided in both of them. May be.

  In the caster operating devices 2, 102, 202, and 302 according to the above embodiments, the operating member 11 is always held in the locked state by the lock spring (first spring) 22 to restrict the displacement thereof. However, the external force that overcomes the spring 22 is given by the user's operation so that the lock is released. However, the present invention is not limited to this. In the case of furniture (attached body) that only needs to be temporarily locked, a temporary locking mechanism (temporary locking means) is provided as the reverse mechanism, and the operation member 11 is always held in the unlocked position. Then, the displacement is restricted, and when the operation member 11 is displaced against the restriction by the external force, the displacement to the lock position is allowed, and when the external force is lost, the operation member 11 is moved to the unlock position. It may be allowed to return. As shown in the first, third, and fourth embodiments, the temporary lock mechanism may be provided with a stopper to hold the operation member 11 at the lock position and restrict the displacement of the operation member 11. Furthermore, in the caster operating devices 2, 102, 202, and 302 according to the above-described embodiments, the caster operating devices 2, 102, 202, and 302 are attached to a mounted body such as furniture, bedding, a floor-top base, or a carriage. Needless to say, a traveling body such as an overbed table or a wagon may be used.

2 Operating device for casters 3 Furniture (attachment)
5 Caster 11 Operation member 40 Lock mechanism 50 Fail safe mechanism (fail safe means)

Claims (14)

A caster operating device that is connected to a caster lock mechanism provided on a body to be mounted and that displaces an operating member to perform an on / off operation of the lock,
The operating member is always held in the locked position to restrict its displacement. When the operating member is displaced against the restriction by an external force, it is allowed to move to the unlocked position, and when the external force is lost, the operating member is locked. A caster operating device provided with fail-safe means for returning to a normal state.   The fail-safe means is provided on the lock mechanism so as to be displaceable, and locks the caster at one of the upper and lower lock positions, and releases the lock at the other lock release position, and pushes the lock operation member to the lock position. A first spring that urges and urges, a frame that is provided on the mounted body and accommodates an operation member therein so as to be movable up and down, a lower end is connected to a lock operation member of the lock mechanism, and an upper end is connected to the operation member The caster operating device according to claim 1, comprising an operation transmitting member.   When the operating member reaches the unlocking position, an operating member restricting means that restricts the displacement of the operating member by an external force and allows the operating member to be displaced when the operating member at the unlocking position is unlocked by an external force is provided. The caster operating device according to claim 1 or 2.   The operating member restricting means is provided on the upper part of the operating member with a locking part formed with a tip protruding in the lateral direction, and provided on the upper part of the frame so as to be slidable in the horizontal direction and exposed on the upper surface of the frame. The caster operating device according to claim 3, further comprising: a knob formed with a stopper formed with a receiving portion capable of receiving the locking portion inside the upper portion of the frame body.   The operating member regulating means regulates the displacement of the operating member at the unlocked position when the operating member is displaced from the lower locked position to the upper unlocked position against the elastic force of the first spring by an external force. The caster operating device according to claim 3.   The stopper receiving portion is constituted by a step portion on which the locking portion can be placed, and an inclined portion is provided on the lower side surface of the step portion so as to be brought into sliding contact with the protruding end of the locking portion and guided to the step portion. The caster operating device according to claim 5, wherein a second spring for urging the stopper laterally is provided between the frame and the frame.   The step portion is configured by a concave portion having an arc-shaped cross section that can receive the locking portion, and the lower side surface of the concave portion is curved continuously to the concave portion, and the protruding end of the locking portion is slidably brought into contact with the concave portion. The caster operating device according to claim 6, further comprising a portion.   The caster operating device according to any one of claims 2 to 7, wherein the first spring is provided in at least one of the lock mechanism or between the frame and the operating member.   9. The frame according to any one of claims 2 to 8, wherein an opening is formed in the frame, and the operation portion of the operation member is configured by a concave portion or a protrusion exposed to the outside from the opening. Caster operating device.   At least one of the upper and lower sides of the operation portion of the operation member is provided with a display portion indicating a locked state or an unlocked state, and either one of the lock position and the unlock position of the operation member is displayed. The caster operating device according to claim 9, wherein The frame comprises a frame main body formed in an L-shaped cross section, and a guide side wall provided with guide grooves formed on the inner side of the frame facing each other on both the left and right sides of the opening,
Protrusions that can be fitted into the guide grooves of the guide side wall are provided on both sides of the operation member,
The caster operating device according to claim 9 or 10, wherein the operating member is mounted between the guide side walls so as to be movable up and down.   The caster operating device according to any one of 2 to 11, wherein the frame is attached to a housing portion formed by recessing a part of the attached body. The lock mechanism of the casters is a lock mechanism of a plurality of casters that locks the plurality of casters attached to the mounted body,
A mounting member that is disposed at a corner of the bottom surface of the mounted body and pivotally attaches the caster to the mounted body;
The brake rod is accommodated in a caster body that is rotatably supported by the wheel, and the upper end protrudes to the outside. The brake rod is displaced to swing the lock member to rotate the caster or rotate the wheel. Caster lock means for locking or unlocking at least one of them,
Each of the front and rear mounting members has the same axial center and is pivotally provided and urged in one direction, and one end of the locking member is attached to one side, and one end is attached to each shaft and the swinging end Is provided with an actuating arm that contacts the brake rod to operate the brake rod, and a transmission link that connects different shafts and transmits the rotation of one shaft to the other shaft in the same direction. The caster operating device according to any one of claims 2 to 12, further comprising interlocking means for transmitting the power to the brake rod via the operating arm. A caster operating device that is connected to a caster lock mechanism provided on a body to be mounted and that displaces an operating member to perform an on / off operation of the lock,
The operation member is always held at the unlocked position to restrict its displacement, and when the operation member is displaced against the restriction by external force, the displacement to the lock position is allowed. When the external force is lost, the operation member is unlocked. A caster operating device provided with a temporary locking means for returning to a position.

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