JP6594176B2 - Caster equipment - Google Patents

Description

  The present invention relates to a caster device having a turnable and rotatable wheel.

  2. Description of the Related Art A caster device having a turnable and rotatable wheel has been widely known. For example, Patent Document 1 discloses a caster device.

  The caster device disclosed in Patent Document 1 includes four wheels that are turnable and rotatable, a wheel turning lock member that locks and turns each of the four wheels, and a wheel rotation lock that locks and rotates each of the four wheels. A member and a caster operation part are provided. Then, by operating the caster operation unit, the free state in which the four wheels can turn and rotate, the course lock state in which the four wheels cannot turn and rotate, and the four wheels turn It is formed so that it can be switched to a locked state where it is locked in a non-rotatable state.

Japanese Patent No. 5450302

  However, in Patent Document 1, in order to switch all four wheels to a free state, a course lock state, and a lock state, for each of the four wheels, A wheel rotation lock member is provided, and thereby, in the locked state, each of all four wheels is rotationally locked and locked. For this reason, in Patent Document 1, the structure is complicated and the manufacturing cost is high.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a caster device that has a simplified structure and can be manufactured at low cost.

In order to solve the above-mentioned problem, the present invention includes a wheel holding leg disposed at a lower end of a moving body, and a wheel that is rotatably and turnably held by the wheel holding leg. A long first wheel holding leg having a first wheel axle; and a second wheel holding leg connected to the first wheel holding leg and having a second wheel axle, wherein the wheel includes the first wheel holding leg. A plurality of first wheels rotatably held on the first wheel axle of the wheel holding leg, and at least one second wheel rotatably held on the second wheel axle of the second wheel holding leg. The first wheel holding leg includes a first wheel turning lock member for locking the turning of the first wheel, and a first wheel rotation locking member for locking the rotation of the first wheel, The first wheel turning lock member has a predetermined axial direction of the first wheel axle. The turning of the first wheel is locked in a state along the direction, the first wheel rotation locking member locks the first wheel locked for turning, and the second wheel holding leg is A second wheel turning lock member for locking the turning of the second wheel, wherein the first wheel is formed by the first wheel turning lock member and the first wheel rotation locking member; The turning of the second wheel is locked in a state where the axial direction of the second wheel axle is orthogonal to the axial direction of the first wheel axle in a state in which the turning is impossible and the rotation is impossible. A caster device is provided. Here, the wheel is rotatable means that the wheel rotates around the axis parallel to the mounting surface such as the floor surface on which the caster device is placed and can travel while rolling on the mounting surface. This means that the wheel can rotate about an axis perpendicular to the placement surface.

According to this, the second wheel turning lock member is in a state orthogonal to the axial direction of the first wheel axle in a state in which the axial direction of the second wheel axle cannot turn and cannot rotate. Since the turning of the wheel is locked, the rotation of the second wheel is more reliably regulated by the first wheel, and the second wheel is more difficult to rotate. Thereby, a caster apparatus can be made into a locked state.

  Therefore, it is not necessary to provide a member for locking the rotation of the second wheel, the structure can be simplified, and it can be manufactured at a low cost.

  The second wheel holding leg includes a second wheel holder having the second wheel axle, and a second wheel holding leg main body holding the second wheel holder so that the second wheel can turn. The second wheel turning lock member includes a lock portion that locks the second wheel so as not to turn, and the second wheel holder includes a locked portion that is locked to the locking portion, and the locked portion. A direction determining portion that determines an axial direction of the second wheel axle so that an axial direction of the second wheel axle is aligned with the intersecting direction when locked to the lock portion; Can be configured.

  According to this, when the locked portion is locked to the lock portion, the direction determining portion causes the axial direction of the second wheel axle to be a direction along the direction intersecting the axial direction of the first wheel axle. The axial direction of the second wheel axle is determined. Thus, when the locked part is locked to the locking part, the axial direction of the second wheel axle is in a direction along the intersecting direction, and the locked part can be locked to the locking part. Therefore, the lock portion and the locked portion can be easily locked in a state where the axial direction of the second wheel axle is in the direction along the intersecting direction.

  The first wheel holding leg further includes a first wheel lock operation member for operating the first wheel rotation lock member and the first wheel rotation lock member, and the first wheel lock operation member includes A free position where the first wheels are rotatable and turnable, a course lock position where each first wheel is rotatable and non-turnable, and a course lock position where each first wheel is turnable and non-turnable, and the first wheels are non-rotatable and turnable The second wheel turning lock member is movable with respect to the first wheel so that the first wheel lock operation member can move to the first wheel so that the first wheel lock operation member can move to the first wheel. The second wheel can be configured to be locked so as not to turn when the lock position is reached.

  According to this, since the second wheel turning lock operating member is formed so as to lock the second wheel so as not to turn when the first wheel locking operating member comes to the lock position, the second wheel turning lock operating member can be easily and reliably The second wheels can be made non-turnable when each first wheel is non-rotatable and non-turnable.

  Further, a second wheel lock operation member that is connected to the second wheel rotation lock member and operates the second wheel rotation lock member, and a caster operation that operates the first wheel lock operation member and the second wheel lock operation member. And a connecting member that connects the caster operating member and the second wheel lock operating member together with the member, the caster operating member, and the first wheel lock operating member. As the caster operating member is operated, the first wheel lock operating member is moved to each of the free position, the course lock position, and the lock position, and the first wheel lock operating member is moved to the free position. And when the second wheel lock operating member comes to the course lock position, the lock part and the locked part are unlocked, The first wheel lock operation member and the first wheel lock operation member are arranged so that the second wheel lock operation member can lock the lock portion and the locked portion when the first wheel lock operation member comes to the lock position. It can be set as the structure connected with the 2nd wheel lock operation member so that interlocking is possible.

  According to this, by operating the caster operation member, the first wheel lock operation member can be moved to each of the free position, the course lock position, and the lock position. Each can be in a free state, a course lock state, and a lock state. Further, when the first wheel is locked, the second wheel lock operating member can lock the lock portion and the locked portion. Accordingly, the first wheel can be brought into a free state, a course lock state, and a locked state by one operation of operating the caster operation member, and the second wheel can be rotated and cannot turn.

  Further, the moving body is a one-leg table that overhangs above an installed object, the wheel holding leg is disposed at a lower end of the one-leg table, and the second wheel holding leg is a long body. The second wheel is composed of two arranged at both ends of the second wheel holding leg, and the first wheel holding leg and the second wheel holding leg are substantially spaced apart from each other by a predetermined distance. It can be set as the structure connected via the connection leg so that it may become parallel.

  According to this, for example, the first wheel holding leg can be suitably used for a one-leg overbed table that enters inward from the gap between the bed and the floor.

  Each of the first wheels may have a configuration in which the diameter of the first wheel is larger than the diameter of the second wheel.

  According to this, when the diameter of the 1st wheel is larger than the diameter of the 2nd wheel, if the same force is applied to each of the 1st wheel and the 2nd wheel, it will be 1st wheel rather than the 2nd wheel. Since a large rotational torque is applied, by locking the turning and rotation of the first wheel, it is possible to make the second wheel locked to turn more difficult to rotate more reliably.

  According to the present invention, it is possible to realize a caster apparatus that has a simplified structure and can be manufactured at low cost.

It is the perspective view seen from the diagonally upper side of the one leg overhead table as a one leg table which concerns on one Embodiment which has the caster apparatus of this invention. It is the perspective view seen from the diagonally lower side of the single leg overhead table of FIG. It is a front view of the single leg overhead table of FIG. It is a side view of the single leg overhead table of FIG. It is a perspective view of each member which carries out lock operation of the 1st wheel and 2nd wheel in the one leg overhead table of FIG. FIG. 6 is a front view of FIG. 5. It is a front view of the principal part of the 1st wheel holding leg holding the 1st wheel. It is a disassembled perspective view of the principal part of the 1st wheel holding leg which hold | maintained the 1st wheel. It is sectional drawing of the principal part of the locked state of a 1st wheel. It is sectional drawing of the principal part of the course lock state of a 1st wheel. It is sectional drawing of the principal part of the free state of a 1st wheel. (A) is a top view of a bracket, (b) is an exploded perspective view of a stopper member and a turning braking body. It is a top view of the principal part for demonstrating a 2nd wheel turning lock member, a 2nd wheel lock operation member, and a 2nd wheel. It is a disassembled perspective view of the 2nd wheel lock operation member. It is a disassembled perspective view of a 2nd wheel turning lock member. It is a perspective view of the 2nd wheel holder holding the 2nd wheel. (A) is a left side view of the second wheel holder, (b) is a plan view of the second wheel holder, (c) is a front view of the second wheel holder, and (d) is a view of the second wheel holder. It is a right view. It is the XVIII-XVIII sectional view taken on the line of FIG. It is explanatory drawing at the time of locking a 2nd wheel holder (2nd wheel) with a 2nd wheel turning lock member. FIG. 5 is a sectional view taken along line XX-XX in FIG. 4.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of a single-leg overbed table 1 according to an embodiment having a caster device of the present invention as seen from an obliquely upper side, and FIG. 2 is a perspective view of the single-leg overbed table 1 of FIG. FIG. 3 is a front view of the one-leg overbed table 1 of FIG. 1, and FIG. 4 is a side view of the one-leg overbed table 1 of FIG.

  The one-leg overbed table 1 of this embodiment includes a table plate 2 that overhangs above a bed (installed object) 10 (see FIG. 3), and is on one side of the lower surface of the table plate 2 (left side in FIG. 2) Is attached with an I-shaped vertical leg 3. At the lower end of the vertical leg 3, an H-shaped horizontal leg (caster device) 4 extending in the other direction of the table plate 2 in plan view is attached.

  The vertical leg 3 is composed of an outer cylindrical body 3A fixed to the table plate 2 and an inner cylindrical body 3B fixed to the horizontal leg 4, and the outer cylindrical body 3A of the table plate 2 is movable up and down on the inner cylindrical body 3B. It is fitted outside.

  A damper (not shown) for assisting the raising and lowering of the table plate 2 is incorporated in the inner cylindrical body 3B and the outer cylindrical body 3A, and the damper is locked / unlocked on the left side of the lower surface of the table plate 2 An elevating lever 6 for operation is attached. When the lift lever 6 is unlocked, the table plate 2 can be lifted and lowered with the assistance of a damper. When the lift lever 6 is locked, the table plate 2 can be locked at the lift position. Since this damper, elevating lever 6 and the like employ a known technique, further detailed description is omitted.

  The horizontal leg 4 has a long first wheel holding leg 41 arranged at the lower end of the vertical leg 3, a first wheel 19 held by the first wheel holding leg 41, a first wheel holding leg 41 and a predetermined length. A long second wheel holding leg 42 arranged in parallel with a distance of, a second wheel 44 held by the second wheel holding leg 42, a first wheel holding leg 41 and a second wheel holding leg. The connecting leg 43 is connected to the connecting leg 43.

  As shown in FIGS. 8 and 12A, the left and right flange portions 13 a of the substantially U-shaped bracket 13 are fixed to the lower surface of the first wheel holding leg 41 with screws or the like. As shown in FIG. 9, a recess 13d is formed in the bottom 13c between the side walls 13f of the bracket 13, and an oval caulking hole 13e is formed in the recess 13d. A main shaft member 15 is attached to the bracket 13.

  As shown in FIGS. 9 to 11, the main shaft member 15 is configured by a cylindrical body extending in the vertical direction, and a central hole 15 a penetrates in the vertical direction. The shaft member 17 is inserted into the central hole 15 a. The upper, middle and lower three stages are supported so as to be movable. Here, FIG. 9 shows the lower stage (lock position), FIG. 10 shows the middle stage (course lock position), and FIG. 11 shows the upper stage (free position).

  A sliding body 30 that is downwardly hemispherical and extends between both side walls 13f of the bracket 13 is fitted into the upper head portion 17a of the shaft member 17 that protrudes between the both side walls 13f of the bracket 13.

  Moreover, as shown in FIGS. 7-11, the elongate 1st wheel lock operation member 32B guided so that a reciprocation is possible is arrange | positioned between the both-side walls 13f of the bracket 13. As shown in FIG. Fork-shaped slits 32d are formed at both ends of the first wheel lock operating member 32B in the longitudinal direction so as to allow the shaft member 17 to pass therethrough, and a lower portion 32a, a middle portion 32b, and an upper portion 32c are formed at the portions. It is formed in steps.

  8 to 11, the lower part 32a, the middle part 32b, and the upper part 32c represent only one end part in the longitudinal direction of the first wheel lock operation member 32B. The lower part 32a, the middle part 32b, and the upper part 32c of the other end part are arranged in order from one end in the longitudinal direction of the first wheel lock operation member 32B to the other end side (Y2 side), similarly to the one end part. Yes.

  And if the sliding body 30 is located in the lower part 32a by the movement of the 1st wheel lock operation member 32B (refer FIG. 9), the shaft member 17 will be moved to a lower stage according to it. Further, when the sliding body 30 is positioned at the middle portion 32b (see FIG. 10), the shaft member 17 is moved to the middle level following that. Further, when the sliding body 30 is positioned at the upper part 32c (see FIG. 11), the shaft member 17 is moved to the upper stage following that.

  A large-diameter flange portion 15 b and an oval caulking portion 15 c that fits into the caulking hole 13 e of the bracket 13 from below are formed on the upper portion of the main shaft member 15. Then, by placing the flange portion 15b on the lower surface of the recessed portion 13d of the bracket 13 and caulking portion 15c fitted into the caulking hole 13e outward, the main shaft member 15 is positioned around the axis, The bracket 13 is fixed integrally.

  As shown in FIGS. 8 and 9, a hexagonal caulking portion 15d is formed in the lower part of the main shaft member 15, and the caulking portion 15d has a hexagonal caulking hole 16a of the plate-like turning brake body 16. Is inserted from below. Then, by swaging the caulking portion 15d outward, the turning brake body 16 is integrally fixed to the main shaft member 15 while being positioned around the shaft (non-rotatable state).

  As shown in FIG. 12B, the turning braking body 16 has engaging convex portions 16b formed at two positions on the right and left sides of the caulking hole 16a in the direction orthogonal to the axis.

  A holder member 18 is held on the main shaft member 15. The holder member 18 has a slightly smaller diameter than the first wheel 19 and is formed in a substantially disk shape having a thickness. A hollow portion 18b is formed around the axle hole 18a. The first wheel 19 is rotatably supported on the first wheel axle 20 that is passed through and supported by the axle hole 18a.

  In this embodiment, the first wheel 19 includes a pair of first traveling wheels 19 a that are rotatably supported by the first wheel axle 20 at both side positions of the holder member 18. In FIG. 8, the right first traveling wheel 19a is not shown.

  The holder member 18 is formed with a through hole 18c penetrating in the vertical direction at a position eccentric from the axle hole 18a. By fitting the through hole 18c to the main shaft member 15 from below, the holder member 18 that rotatably supports the first wheel 19 around the first wheel axle 20 is held rotatably by the main shaft member 15. become. A spacer 21 a and a cap 21 b are interposed between the flange portion 15 b of the main shaft member 15 and the upper end of the holder member 18.

  As shown in FIG. 8, a rectangular storage recess 18d that is wider than the through hole 18c is formed at a position below the through hole 18c of the holder member 18, and a braking block (first wheel rotation) is formed in the storage recess 18d. The lock member 23 is housed so as to be movable up and down so as not to rotate. The braking block 23 is urged in the downward movement direction by a coil spring 24 disposed so as to be compressed between the upper wall of the housing recess 18 d and the upper surface of the braking block 23.

  The brake block 23 is formed with a small-diameter through hole 23b through which the lower portion of the main shaft member 15 passes. A large-diameter cylindrical hole 23c that opens downward is formed below the through hole 23b, and the swivel braking body 16 that is caulked by the caulking portion 15d of the main shaft member 15 is located in the cylindrical hole 23c. To come.

  A large-diameter sleeve 26a is fitted and fixed to the lower opening of the cylindrical hole 23c, and a small-diameter sleeve 26b is fitted to the center hole of the sleeve 26a from below. The lower portion of the shaft member 17 protrudes downward from the center hole of the small-diameter sleeve 26b, and an E-ring 27 is fitted into the protruding portion so that the shaft member 17 does not come out upward.

  Therefore, when the shaft member 17 is moved up to the middle stage / upper stage by the middle part 32b and the upper part 32c of the first wheel lock operating member 32B, the braking block 23 is moved via the E ring 27, the small diameter sleeve 26b, and the large diameter sleeve 26a. The coil spring 24 is moved up against the urging force of the coil spring 24. Further, if the shaft member 17 is not forced to move up by the middle portion 32b and the upper portion 32c of the first wheel lock operating member 32, the shaft member 17 is also moved down together with the braking block 23 by the biasing force of the coil spring 24. Become.

  In the lower part of the braking block 23, downward comb teeth 23d protruding sideways are formed, and in the circumferential direction of the inner peripheral surface of the first traveling wheel 19a of the first wheel 19 facing the comb teeth 23d, A plurality of gear portions 191 that are engaged with and engaged with the comb teeth 23d when the brake block 23 is moved downward are formed.

  Therefore, when the braking block 23 moves downward in conjunction with the lower movement of the shaft member 17, the comb teeth 23 d of the braking block 23 mesh with the gear portion 191 of the first wheel 19, thereby rotating the first wheel 19. Is prevented (wheel rotation lock). Further, when the braking block 23 moves upward in conjunction with the upward movement of the middle and upper stages of the shaft member 17, the comb teeth 23 d of the braking block 23 do not mesh with the gear portion 191 of the first wheel 19, so that the first wheel 19 rotations are allowed (wheel rotation free).

  An insertion groove 23e penetrating the cylindrical hole 23c is formed in the upper portion of the brake block 23, and a stopper member 28 of a rectangular plate is inserted into the insertion groove 23e from the side to prevent rotation. Become. The stopper member 28 is prevented from coming out of the insertion groove 23e when the brake block 23 is housed in the housing recess 18d of the holder member 18.

  As shown in FIG. 9, the stopper member 28 is positioned above the turning brake body 16 that is caulked at the lower portion of the main shaft member 15. As shown in detail in FIG. 12 (b), the stopper member 28 is formed with engaging recesses 28 b that can engage with the engaging protrusions 16 b at the two left and right sides of the turning brake body 16.

  The engagement concave portion 28b of the stopper member 28 and the engagement convex portion 16b of the turning braking body 16 are directed to the direction of the first wheel 19 that moves the one-leg overbed table 1 in the front-rear direction (Y1-Y2 direction), in this embodiment. , Engaged only when the axial direction of the first wheel axle 20 holding the first wheel 19 is along the first direction (X1-X2 direction) which is the left-right direction orthogonal to the front-rear direction, The direction of the holder member 18 is set so as to prevent the holder member 18 from turning.

  Further, the stopper member 28 and the turning brake body 16 are linked to the movement of the middle and lower stages of the shaft member 17, and the stopper member 28 and the turning brake body 16 are engaged to prevent the holder member 18 from turning. The first wheel turning lock member functions. Then, in association with the upper movement of the shaft member 17, the upper and lower positions thereof are set so as to allow the holder member 18 to turn by releasing the engagement between the stopper member 28 and the turning brake body 16. Yes.

  Here, the shaft member 17, the brake block 23, the stopper member 28, the sliding body 30 and the like constitute a switching mechanism.

  On the other hand, as shown in FIGS. 2 and 3, a caster operation member 35 that can be manually rotated is attached to a lower surface of the table plate 2 of the one-leg overbed table 1 by a support shaft 34.

  A connecting shaft 36 is rotatably disposed inside the outer cylindrical body 3A and the inner cylindrical body 3B of the vertical leg 3, and the connecting shaft 36 includes an outer cylindrical shaft body 36A on the table plate 2 side and a first wheel holding. It is comprised by the inner cylinder shaft body 36B by the side of the leg 41. FIG. An outer cylinder shaft body 36A on the table plate 2 side is fitted on the inner cylinder shaft body 36B on the first wheel holding leg 41 side so as to be vertically movable and non-rotatable. The outer cylinder shaft body 36 </ b> A moves up and down following the elevation of the table plate 2.

  A caster operating member 35 is connected to the upper end portion of the outer cylindrical shaft body 36A via links 37a and 37b, and a first wheel lock operating member 32B is connected to the lower portion of the inner cylindrical shaft body 36B via a link 37c. Further, a second wheel lock operating member 432 described later is connected through a link 37d. The connecting shaft 36 and the links 37a to 37d formed of the outer cylinder shaft body 36A and the inner cylinder shaft body 36B connect the caster operation member 35 and the first wheel lock operation member 32B, and A connecting member that connects the two-wheel locking operation member 432 is configured.

  Next, the 2nd wheel holding leg 42, the 2nd wheel 44, and the connection leg 43 which are located inside the bed 10 are demonstrated.

  The second wheel holding leg 42 includes a second wheel holding leg main body 420 shown in FIGS. 1 to 4 and a second wheel turning lock member 424 shown in FIG. 5 that locks the turning of the second wheel. .

  The second wheel holding leg main body 420 has a rectangular tubular long frame part 421 and two attached to one side (Y1 side) and the other side (Y2 side) of the frame part 421 in the longitudinal direction. A second wheel holding portion 422 and a second wheel holder 423 held by each second wheel holding portion 422 are provided (see FIG. 16).

  As shown in FIG. 20, the frame portion 421 can move the second wheel turning lock member 424 along the longitudinal direction of the frame portion 421 (Y1-Y2 direction in FIG. 1) on two inner surfaces facing each other inside. A holding groove 4211 is formed.

  Each second wheel holding portion 422 includes a plate-like portion 4221 (see FIG. 13). The plate-like portion 4221 includes a holder holding portion 4222 that holds the second wheel holder 423 so as to be rotatable in the horizontal direction, that is, turnable. And the 2nd wheel holding | maintenance part 422 is fixedly attached to each of the both ends of the longitudinal direction of the frame part 421, as shown in FIG.

  As shown in FIG. 17, each second wheel holder 423 includes a second wheel turning shaft 4231, a second wheel axle 4232, a direction determining portion 4233, and a locked portion 4234.

  The second wheel turning shaft 4231 includes a held portion 4231a on which the holder holding portion 4222 is rotatably held.

  The second wheel axle 4232 is formed such that its axial direction is orthogonal to the axial direction of the second wheel turning shaft 4231.

  The direction determining portion 4233 is for determining the axial direction of the second wheel axle 4232 when the second wheel 44 (locked portion 4234) is locked to the second wheel turning lock member 424, and is shown in FIG. Thus, it is formed in the lower part of the held portion 4231a of the second wheel turning shaft 4231.

  The direction determining portion 4233 is formed on both sides of the locked portion 4234 as shown in FIG. Each direction determination part 4233 is comprised from the two inclined surfaces 4233a which become narrow gradually as it goes to the front end side.

  As shown in FIG. 18, the locked portion 4234 includes two lock surfaces 4234a formed in parallel with a predetermined distance L1 therebetween. A distance L2 from the axis O of the second wheel turning shaft 4231 to the lock surface 4234a is ½ of the distance L1 between the lock surfaces 4235a. The distance L2 is smaller than the distance L3 from the axis O of the second wheel turning shaft 4231 to the inclined surface 4233a.

  The locked portion 4234 is formed on the surface of the second wheel axle 4232 along the same direction as the axial direction.

  As shown in FIG. 20, the second wheel holder 423 holds the held portion 4231 a of the second wheel turning shaft 4231 rotatably on the holder holding portion 4222 of the plate-like portion 4221 in the second wheel holding portion 422. Has been.

  In this embodiment, each of the second wheels 44 is composed of a second traveling wheel 44a that is pivotally attached to each side position of the second wheel axle 4232 of the second wheel holder 423 so as to form a pair. ing.

  As shown in FIG. 7, the outer diameter D1 (for example, about 30 mm) of the second traveling wheel 44a is smaller than the outer diameter D2 (for example, about 70 mm) of the first traveling wheel 19a of the first wheel 19.

  The second wheel 44 is held by the second wheel holder 423, so that the second wheel 44 is rotatably held by the second wheel holding leg 42 via the second wheel turning shaft 4231.

  As shown in FIGS. 13, 15, and 19, the second wheel turning lock member 424 is composed of two long bodies, that is, a short turning lock member 4241 and a long turning lock member 4242 longer than the short turning lock member 4241. It is configured.

  The short turning lock member 4241 is provided with a lock part 4243 that locks the second wheel 44 so as not to turn and can be unlocked at one end part (Y1 side end part) in the longitudinal direction, and the other end part (Y2 side). The mounting portion 4244 connected to the second turning lock member 4242 is provided at the end of the second rotation lock member 4242.

  The lock part 4243 of the short turning lock member 4241 includes a turning part 4243a and a lock groove 4243b. The turning portion 4243a is a portion that receives the direction determining portion 4233 of the second wheel holder 423 and appropriately turns it, and is formed with a predetermined depth and width from one end face of the short turning lock member 4241.

  The lock groove 4243b is formed with a predetermined depth and width on the other side (Y2 side in the drawing) of the turning portion 4243a of the second wheel holder 423. The width L4 of the lock groove 4243b is set to be approximately the same as the distance L1 of the locked portion 4234 such that the locked portion 4234 can be inserted.

  The long turning lock member 4242 includes a mounting portion 4245 connected to the first turning lock member 4241 at one end portion in the longitudinal direction, and locks the second wheel 44 to the other end portion in the longitudinal direction so as not to turn. In addition, a lock portion 4246 that can be unlocked and a receiving hole 4247 that movably receives the direction determining portion 4233 and the locked portion 4234 of the second wheel holder 423 are provided.

  The attachment portion 4245 of the long turning lock member 4242 is provided with a bent portion 4245a obtained by bending a part of the end portion of the attachment portion 4245 upward and a connection hole 4245b formed in the bent portion.

  The connection hole 4245b serves as a connection portion that connects to a second wheel lock operation member 432 of the connection leg 43 described later. In this embodiment, the connection hole 4245b is a long hole shape into which a part of the tip of the second wheel lock operation member 432 enters. It consists of an insertion hole.

  The lock part 4246 of the long turning lock member 4242 includes a turning part 4246a and a lock groove 4246b formed on the other side (Y2 side) of the turning part 4246a, like the lock part 4243 of the short turning lock member 4241. Yes.

  The receiving hole 4247 is formed on one side (Y1 side) of the turning part 4246a so as to communicate with the turning part 4246a.

  The long turning lock member 4242 and the short turning lock member 4241 have their mounting portions 4244 and 4245 overlapped with each other, and mounting holes 4244a and 4245a provided in the mounting portions 4244 and 4245, respectively, via pins (not shown). Are fixedly attached to each other.

  Next, the connecting leg 43 will be described. The connecting leg 43 includes a rectangular cylindrical connecting leg main body 431 shown in FIGS. 1 to 3 and a second wheel lock operation member 432 shown in FIGS. 5 and 6 arranged inside the connecting leg main body 431. Yes.

  The connecting leg main body 431 is connected to the center of the first wheel holding leg main body 40 and the second wheel holding leg main body 420 so that they are parallel to each other. As shown in FIGS. The connecting leg main body 431, the first wheel holding leg main body 40, and the second wheel holding leg main body 420 are H-shaped.

  As shown in FIGS. 5, 6, and 16, the second wheel lock operation member 432 is formed of a long plate shape, and has an inner cylindrical shaft body at one end in the longitudinal direction (end on the X1 side). A shaft coupling portion 4321 that pivotably couples to a link 37d provided at the lower portion of 36B is provided.

  The shaft connecting portion 4321 according to this embodiment is formed of a long hole that movably receives a protruding piece 371 provided on the link 37d of the inner cylindrical shaft body 36B.

  Further, the second wheel lock operation member 432 includes a connected portion 4322 connected to the other end portion (the end portion on the X2 side) so as to be interlocked with the connection hole 4245b of the second wheel turning lock member 424. In this embodiment, the connected portion 4322 enters the connection hole 4245b of the second wheel turning lock member 424 so that it can turn with respect to the second wheel turning lock member 424.

  The second wheel lock operating member 432 includes a pin insertion hole 4323 at an intermediate portion between the shaft connecting portion 4321 and the connected portion 4322.

  In the second wheel lock operation member 432 configured as described above, the shaft pin 4311 provided in the connecting leg main body 431 is rotatably inserted into the pin insertion hole 4323, thereby the second wheel lock operation member. 432 is rotatably held by the connecting leg main body 431.

  Next, operation | movement of the one leg overbed table 1 of this Embodiment which has this caster apparatus is demonstrated.

  First, when the caster operating member 35 is operated to the “free position” in FIG. 5, the connecting shaft 36 is rotated in the arrow a direction via the links 37 a and 37 b. Then, the first wheel lock operating member 32B moves in the arrow Y1 direction together with the first connecting member 32A via the link 37c, and the shaft member 17 is moved upward in the upper portion 32c as shown in FIG.

  In this state, the comb teeth 23d of the braking block 23 are disengaged from the gear portion 191 of the first wheel 19, and the engagement between the stopper member 28 and the turning braking body 16 is disengaged, and the first wheel 19 is in a free state in which it can turn and rotate.

  Further, when the connecting shaft 36 rotates in the direction of arrow a, the second wheel lock operating member 432 rotates about the shaft pin 4311 via the link 37d in the counterclockwise direction of FIG. The connected portion 4322 of the member 432 moves to the Y2 side. In this state, the locked portion 4234 of one second wheel holder 423 is disengaged from the locking portion 4243 of the short turning lock member 4241, and the locked portion 4234 of the other second wheel holder 423 is locked to the long turning lock member 4242. It will be in the state which removed from the part 4246 and entered into the receiving hole 4247. FIG. Accordingly, the second wheel 44 held by the second wheel holder 423 is in a free state in which it can turn and rotate.

  Next, when the caster operating member 35 is operated to the “course lock position” in FIG. 5, the connecting shaft 36 is similarly rotated in the direction of arrow c, and the first wheel lock operating member 32B is moved in the direction of arrow Y2. Then, as shown in FIG. 10, the shaft member 17 is moved to the middle stage by the middle portion 32b.

  In this state, the state in which the comb teeth 23d of the braking block 23 are disengaged from the gear portion 191 of the first wheel 19 is maintained, but the engaging convex portion 16b of the turning brake body 16 enters the engaging concave portion 28b of the stopper member 28. Thus, the stopper member 28 and the turning brake body 16 are engaged. Therefore, in this state, the first wheel 19 is in a course lock state in which the first wheel 19 cannot turn and can rotate. Further, in this state, the axial direction of the first wheel axle 20 of the first wheel 19 is arranged in a direction along the first direction (X1-X2 direction) (state of FIGS. 1 to 6).

  Further, as the connecting shaft 36 rotates in the direction of arrow c, the second wheel lock operating member 432 rotates about the shaft pin 4311 in the counterclockwise direction via the link 37d. With this rotation, the connected portion 4322 of the second wheel lock operating member 432 further moves to the Y1 side, but in this state, the locked portion 4234 of one second wheel holder 423 is still the short turning lock member 4241. And the locked portion 4234 of the other second wheel holder 423 is released from the locking portion 4246 of the long turning lock member 4242 and enters the receiving hole 4247, and the second wheel holder 423 The second wheel 44 held in the state maintains a free state in which the second wheel 44 can turn and rotate.

  Therefore, in this state, the one-leg overbed table 1 advances only in the second direction (Y1-Y2 direction).

  Next, when the caster operating member 35 is operated to the “lock position” in FIG. 5, similarly, the connecting shaft 36 is further rotated in the direction of arrow c, and the first wheel lock operating member 32B is further moved in the direction of arrow Y2. Then, as shown in FIG. 9, the shaft member 17 is moved downward in the lower portion 32a.

  In this state, the comb teeth 23 d of the braking block 23 enter the gear portion 191 of the first wheel 19, and the engaging convex portion 16 b of the turning braking body 16 enters the engaging concave portion 28 b of the stopper member 28. Therefore, in this state, the first wheel 19 enters a locked state in which it cannot turn and cannot rotate.

  Further, as the connecting shaft 36 rotates in the direction of arrow c, the second wheel lock operating member 432 further rotates counterclockwise in FIG. 13 about the shaft pin 4311 via the link 37d. With this rotation, the connected portion 4322 of the second wheel lock operation member 432 further moves to the Y1 side.

  By this movement, the locked portion 4234 of one second wheel holder 423 tends to enter the turning portion 4243a of the short turning lock member 4241. At that time, as shown by a one-dot chain line in FIG. 19, the direction is determined when the lock surface 4234a of the locked portion 4234 of the second wheel holder 423 forms a predetermined angle with respect to the groove inner surface 4343c of the lock groove 4243b. The portion 4233 contacts the tip of the short turning lock member 4241.

  In this state, when the connected portion 4322 of the second wheel lock operating member 432 further moves to the Y1 side, the locked portion 4234 of the second wheel holder 423 rotates at the turning portion 4243a and the lock surface 4234a It will be in the state which follows the groove inner side surface 4343c of the lock groove 4243b. In this state, when the connected portion 4322 of the second wheel lock operating member 432 further moves to the Y1 side, the locked portion 4234 of the second wheel holder 423 enters the lock groove 4243b as shown in FIG.

  At the same time, the locked portion 4234 of the other second wheel holder 423 attempts to enter the turning portion 4246a from the receiving hole 4247. At that time, as shown by a one-dot chain line in FIG. 19, when the lock surface 4234a of the locked portion 4234 of the second wheel holder 423 forms a predetermined angle with respect to the groove inner side surface 4346c of the lock groove 4246b, 4234a contacts the tip of the short turning lock member 4241.

  Then, by further movement of the connected portion 4322 of the second wheel lock operation member 432 to the Y1 side, the locked portion 4234 of the second wheel holder 423 rotates at the turning portion 4246a, and the lock surface 4236a becomes the lock groove 4246b. It will be in the state which follows the groove inner side surface 4346c, and the to-be-locked part 4234 of the 2nd wheel holder 423 will enter into the lock groove 4246b.

  Therefore, in this state, the two second wheels 44 are in a course lock state in which the turning is impossible and the rotation is possible. Further, in this state, the axial direction of the second wheel axle 4232 of the two second wheels 44 is arranged in a direction along the second direction (Y1-Y2 direction) (state shown in FIGS. 1 to 6).

  In this state, the axial direction of the first wheel axle 20 is perpendicular to the axial direction of the second wheel axle 4232 and is in the direction along the second direction (Y1-Y2 direction).

  In this state, for example, when a force is applied to the table plate 2 of the one-leg overbed table 1, the first wheel 19 is locked so as not to be able to turn and rotate. The movement is restricted and the stop state is maintained.

  At this time, since the axial direction of the second wheel axle 4232 is orthogonal to the axial direction of the first wheel axle 20, the movement of the one-leg overbed table 1 is more reliably regulated and the stop state is reliably ensured. To maintain.

  According to the one-leg overbed table 1 configured as described above, a member for locking the second wheel 44 so as not to rotate can be eliminated. Therefore, the entire apparatus can be simplified and manufactured at a low cost.

  Further, the two first wheels 19 at both ends of the first wheel holding leg 41 located outside the bed 10 can be operated in a free state, a course lock state, and a locked state by a one-touch operation of the caster operation member 35. it can.

  Further, when the first wheel 19 is set to the free state and the course lock state, the second wheel 44 can be set to the free state, and when the first wheel 19 is set to the lock state, the second wheel 44 can be made unrotatable and rotatable.

  In the above embodiment, the second wheel turning lock member 424 has the axial direction of the first wheel axle 20 and the axial direction of the second wheel axle 4232 in a state in which the first wheel 19 is not allowed to turn and cannot be rotated. Although the turning of the second wheel 44 is locked in a state in which they are substantially orthogonal to each other, the invention is not limited to this configuration and can be changed as appropriate. For example, the second wheel turning lock member 424 is in a state where the axial direction of the first wheel axle 20 and the axial direction of the second wheel axle 4232 in a state where the first wheel 19 cannot turn and cannot rotate. The turning of the second wheel 44 may be locked.

  Moreover, in the said embodiment, although the caster apparatus of this invention was used as a part of one leg overbed table, it can change suitably not only the thing of this form, and can be used for various things.

1 One-leg overbed table (moving body)
2 Table board 3 Vertical leg 4 Horizontal leg (caster device)
16 Swing brake body (first wheel swivel lock member)
19 1st wheel 28 Stopper member (1st wheel turning lock member)
23 Brake block (first wheel rotation lock member)
35 caster operating member 41 first wheel holding leg 42 second wheel holding leg 43 connecting leg 44 second wheel 424 second wheel turning lock member 432 second wheel lock operating member

Claims (6)

A wheel holding leg disposed at the lower end of the moving body, and a wheel rotatably and turnably held by the wheel holding leg;
The wheel holding leg includes a long first wheel holding leg having a first wheel axle, and a second wheel holding leg connected to the first wheel holding leg and having a second wheel axle,
A plurality of first wheels rotatably held on a first wheel axle of the first wheel holding leg; and at least a wheel held rotatably on a second wheel axle of the second wheel holding leg. One second wheel,
The first wheel holding leg includes a first wheel turning lock member for locking the turning of the first wheel, and a first wheel rotation locking member for locking the rotation of the first wheel,
The first wheel turning lock member locks the turning of the first wheel in a state where the axial direction of the first wheel axle is along a predetermined direction,
The first wheel rotation lock member locks the first wheel locked for turning so as not to rotate,
The second wheel holding leg includes a second wheel turning lock member for locking the turning of the second wheel,
The second wheel turning lock member has an axial direction of the first wheel axle in a state in which the first wheel cannot turn and cannot rotate by the first wheel turning lock member and the first wheel rotation locking member. A caster device that locks turning of the second wheel in a state in which the axial direction of the second wheel axle is orthogonal to the second wheel axle. The second wheel holding leg includes a second wheel holder having the second wheel axle, and a second wheel holding leg main body holding the second wheel holder so that the second wheel can turn.
The second wheel turning lock member includes a lock portion that locks the second wheel so as not to turn,
The second wheel holder includes a locked portion that is locked to the lock portion, and an axial direction of the second wheel axle is along the intersecting direction when the locked portion is locked to the lock portion. The caster device according to claim 1, further comprising a direction determining unit that determines an axial direction of the second wheel axle so as to be in a direction. The first wheel holding leg further includes a first wheel lock operation member that operates the first wheel rotation lock member and the first wheel rotation lock member,
The first wheel lock operating member includes a free position that allows the first wheels to rotate and turn freely, and a course lock position that turns the first wheels to turn and cannot turn. The first wheel is movable with respect to the first wheel so that the first wheel can be placed in a locked position where the first wheel cannot rotate and cannot turn.
The second wheel rotation lock member, according to claim 2, characterized in that said first wheel lock operation member is formed so as to lock the disabling pivoting said second wheel when came to the locked position Caster equipment. A second wheel lock operation member connected to the second wheel rotation lock member and operating the second wheel rotation lock member; a caster operation member operating the first wheel lock operation member and the second wheel lock operation member; The caster operating member and the first wheel lock operating member are connected, and the connecting member connecting the caster operating member and the second wheel lock operating member is further provided,
The connecting member moves the first wheel lock operation member to the free position, the course lock position, and the lock position in accordance with the operation of the caster operation member, and the first wheel lock operation. When the member comes to the free position and the course lock position, the second wheel lock operation member unlocks the lock part and the locked part, and the first wheel lock operation member moves to the lock position. The first wheel lock operation member and the second wheel lock operation member are connected to each other so that the second wheel lock operation member can lock the lock portion and the locked portion when the second wheel lock operation member comes. The caster device according to claim 3 , wherein the caster device is provided. The moving body is a one-leg table that overhangs above an installation,
The wheel holding leg is disposed at the lower end of the one leg table,
The second wheel holding leg is composed of a long body,
The second wheel consists of two arranged at both ends of the second wheel holding leg,
Wherein the first wheel holding leg and the second wheel holding legs, so as to be substantially parallel at a predetermined distance from each other, more of claims 1-4, characterized in that it is connected via a Renketsuashi A caster device according to claim 1. Wherein each of the first wheel, caster device according to any one of claims 1 to 5, the diameter of the first wheel is equal to or greater than the diameter of the second wheel.

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