JP6572733B2 - Furniture with casters and casters - Google Patents

Description

  The present invention relates to furniture with casters and casters that are suitably used in offices and the like.

  2. Description of the Related Art Various types of furniture such as a table including a caster having a roller at the bottom are known (see, for example, Patent Document 1).

  Incidentally, some casters have a lock portion for prohibiting the rotation operation and the turning operation of the roller. And the operation for operating the lock part in the past has generally been performed by moving an operating body provided in association with the lock part in the vertical direction.

  However, in the case of such a configuration, for example, when the operating body is operated using a toe portion that can be directly visually recognized by the user, the operating body that moves in the vertical direction is used. Therefore, it may be difficult to access the toe portion accurately, and the user may not be able to operate the operating body comfortably.

JP 2009-233078 A

  The present invention has been made paying attention to the above circumstances, and is to provide a caster excellent in operability and furniture with casters having the caster.

  That is, the present invention has the following configuration.

  The invention according to claim 1 is a furniture with casters in which a caster is provided at the bottom of the furniture main body, and the caster is supported on a support body attached to the furniture main body so that a turn base can be horizontally swiveled. A caster body in which a roller is pivotally supported at an eccentric position of the base, and an actuator that operates between a locked position for locking the movement of the caster body and an unlocked position for releasing the lock. A locking portion, and an operating portion for operating the operating member of the locking portion to switch the locking portion to a locked state or an unlocked state. And a push button for operating the actuator using the pressing operation force, and the actuator is moved forward each time a pressing operation force in one direction is applied to the push button. Locked position or the a furnished caster is obtained and a selection holding mechanism for holding alternately in the unlocked position.

  According to a second aspect of the present invention, the furniture main body includes a leg base extending in the front-rear direction, the caster is provided on a use end side of the leg base, and the push button The furniture with casters according to claim 1, wherein the furniture is disposed in the vicinity of a use end of the leg base.

  According to a third aspect of the present invention, the leg base has a channel-like shape that is open downward and has a window at the use end, and the push button is disposed so as to be able to project and retract in the window. The furniture with casters according to claim 2.

  According to a fourth aspect of the present invention, the caster body includes a support body in which a cylindrical peripheral wall is suspended on the lower surface of the top wall, a turn base accommodated in the support body so as to be horizontally rotatable, A roller that is pivotally supported via a horizontal shaft at a position displaced from the turning axis of the turn base, and the lock portion is held by the support body according to an operation on the push button. An actuator that moves forward and backward between the lock position and the non-lock position, a lock body that can be moved up and down in the turn base, and a forward and backward movement of the actuator are converted into an upward and downward movement of the lock body. An engagement position in which the lock body prohibits rotation of the roller and turn operation of the turn base as the actuator advances and retracts between a locked position and an unlocked position. And before It is furnished caster according to claim 1, wherein are set so as to operate between a disengaged position for allowing the rotation and the turn-based turning operation of the roller.

  According to a fifth aspect of the present invention, the cam mechanism includes a cam groove provided on a lower surface of the actuator, a tip provided on the lock body, and a top portion penetrating the top wall of the turn base and the support body. The furniture with casters according to claim 4, further comprising a cam follower engaged with the cam groove.

  According to a sixth aspect of the present invention, the lock body includes a base having the cam follower on the upper surface, and a roll lock claw that is provided on the base and engages with an engagement recess provided on the roller at the engagement position. The furniture with casters according to claim 4 or 5, further comprising: a turn lock claw that is provided at the base and engages with an engagement recess provided at the support at the engagement position.

  The invention according to claim 7 is such that the operating element is held by the support and advances and retracts in a horizontal direction, and the push button is provided at an outer end of the operating element, The furniture with casters according to claim 1, wherein the selective holding mechanism is a heart cam mechanism provided between the operating element and the support.

  According to an eighth aspect of the present invention, the furniture body includes a leg base extending in the front-rear direction, wherein the operating element is held by the support body and moves forward and backward in the horizontal direction. The caster having the operation unit is provided on the use end side of the leg base, and the turn base is held on a support body attached to the leg base on the non-use end side of the leg base so as to be able to turn horizontally. A caster body in which a roller is pivotally supported at an eccentric position of the turn base, and an operation that operates in a horizontal direction from a lock position for locking the movement of the caster body to an unlocked position for releasing the lock. A caster on the counter-use end side provided with a lock part having a child is provided, and the actuator of the caster on the counter-use end side and the actuator of the caster on the use end side are connected to each other. It is furnished caster according to claim 1,2,3,4,5,6 or 7 wherein are operatively connected through.

  According to a ninth aspect of the present invention, the operating element of the caster at the use end side and the operating element of the caster at the counter-use end side are directly connected by a single connecting rod. Furniture with casters.

  The invention according to claim 10 is a caster used by being attached to furniture, wherein the turn base is supported by the support so that the turn base can be turned horizontally, and a roller is pivotally supported at an eccentric position of the turn base; A lock portion having an actuator that operates between a lock position for locking the movement of the caster body and a non-lock position for releasing the lock, and operating the actuator of the lock portion to An operation unit for switching the lock unit to a locked state or an unlocked state, and the operation unit receives a pressing operation force in a substantially horizontal direction and operates the operating element using the pressing operation force. A push button to be operated, and a selective holding for alternately holding the actuator in the locked position or the unlocked position each time a pressing operation force is applied to the push button in one direction. A caster is obtained a mechanism.

  As described above, according to the present invention, it is possible to provide casters with excellent operability and furniture with casters having the casters.

The perspective view which shows one Embodiment of this invention. The perspective view in the embodiment. Sectional drawing in the same embodiment. The partial expanded sectional view in the embodiment. The exploded perspective view in the embodiment. The exploded perspective view in the embodiment. The bottom view for demonstrating the heart cam mechanism in the embodiment. The perspective view for demonstrating the heart cam mechanism in the embodiment. FIG. 3 is a schematic cross-sectional view for explaining operation in the same embodiment. FIG. 3 is a schematic cross-sectional view for explaining operation in the same embodiment. FIG. 3 is a schematic cross-sectional view for explaining operation in the same embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

  In this embodiment, the present invention is applied to a table A with a flap top plate, which is furniture with casters.

  The table A with a flap top plate is composed of a table body B which is a furniture body formed by supporting both left and right ends of a top plate C which can be operated with a leg D, and a caster on the use end side provided at the bottom of the table body B. A first caster E is provided, and a second caster F is provided on the bottom of the table main body B and is a caster on the counter-use end side.

  The table body B is configured such that both ends of the top plate C are supported by left and right legs D so as to be able to perform a flap operation. Each leg D has a leg column d2 erected at the center of a leg base d1 extending in the front-rear direction. Is. And the 1st caster E is provided in the use end side of the said leg base d1 which is the bottom part of the said table main body B, and the 2nd caster F is provided in the counter-use end side.

  The leg base d1 has a channel shape opened downward, and has a window d11 opened toward the front side at the use end. The leg base d1 is provided with a recessed portion d13 for attaching the first caster E on the inner surface of the both side walls d12 at the use end portion, and for attaching the second caster F to the inner surface of the both side walls d12 at the non-use end portion. The concave portion d14 is provided.

  The first caster E is provided on the use end side of the leg base d1 and locks the movement of the caster body G having a basic structure having a roller 3 that functions as a caster. A lock portion H having an actuator 5 that operates between a lock position (I) for unlocking and a non-lock position (J) for releasing the lock, and operating the actuator 5 of the lock portion H And an operation unit M for switching the lock unit H to a locked state or an unlocked state.

  The caster main body G includes a support body 1 attached to the leg base d1, a turn base 2 that is supported by the support body 1 so as to be horizontally rotatable, and the roller 3 that is pivotally supported at an eccentric position of the turn base 2. It is equipped with. In other words, the caster body G includes a support body 1 in which a cylindrical peripheral wall 12 is suspended from the lower surface of the top wall 11, a turn base 2 accommodated in the support body 1 so as to be horizontally rotatable, The turn base 2 is provided with a roller 3 pivotally supported via a horizontal axis j1 at a position deviated from the turning axis.

  The support body 1 is a reverse cup-shaped thing provided with the disk-shaped top wall 11 which has the boss | hub part 14 in the center, and the surrounding wall 12 hung down from the peripheral part of this top wall 11, The said top A pair of rail walls 15 extending in the front-rear direction are provided on the upper surface of the wall 11. An annular region 16 surrounding the boss portion 14 is set on the lower surface of the top wall 11, and a plurality of engaging recesses h <b> 1 are formed adjacent to the annular region 16 in the circumferential direction. The peripheral wall 12 is integrally provided with elastic claws 17 that form a left-right pair for attaching the support 1 to the leg base d1 on the outer surface side thereof. That is, the outer diameter of the support 1 is made to substantially correspond to the inner dimension between the inner surfaces of the side wall d12 in the leg base d1. When the support 1 is inserted between the side walls d12 of the leg base d1, the elastic claws 17 are elastically engaged with the recesses d13 of the leg base d1, and the upper end of the rail wall 15 is in the leg base d1. Abutting on the lower surface of the top wall 11, the support 1 is attached to the leg base d1 in a stable state. Further, a bulging portion 13 extending vertically is formed on the outer surface of the peripheral wall 12 of the support 1, and a bottomed shaft holding hole 18 opened upward is formed in the bulging portion 13.

  The turn base 2 has a disc-shaped top wall 21 having a boss portion 23 in the center and a peripheral wall 22 suspended downward from the peripheral edge of the top wall 21. 2 is provided in the support 1 so as to be able to turn horizontally, with the axis of the boss 23 in 2 aligned with the axis of the boss 14 in the support 1. A plurality of lock claw penetration windows 24 are formed around the boss portion 23 in the top wall 21. In addition, a guide groove 25 for guiding a lock body 6 (described later) to be movable up and down and a shaft support portion 26 for supporting a horizontal shaft j1 penetrating the roller 3 are provided inside the peripheral wall 23. Yes. Although not shown in FIGS. 5 and 6, a thrust bearing having a plurality of balls is provided between the top wall 21 of the turn base 2 and the top wall 11 of the support 1. It has been. A cover 4 is attached to the opening at the lower end of the turn base 2.

  The roller 3 is pivotally supported by the turn base 2 via a horizontal axis j1, and both ends of the horizontal axis j1 are supported by shaft support portions 26 of the turn base 2. The roller 3 includes a hub 31 fitted on the horizontal axis j1, a rim 32 disposed on the outer periphery of the hub 31, an inner periphery of the rim 32, and an outer periphery of the hub 31 in a central portion in the thickness direction. And a plurality of engaging recesses 34 opened toward the hub 31 side are adjacent to each other in the circumferential direction at portions adjacent to the rim 32 on both sides of the disk 33. Is formed.

  The lock portion H is for locking the movement of the caster main body G, and is held by the support 1 and the lock position (I) and the non-lock position (J) according to the operation on the push button 8. An actuator 5 that moves forward and backward between the two, a lock body 6 that is held in the turn base 2 so as to be movable up and down, and a cam mechanism 7 that converts the forward and backward movement of the actuator 5 into the lifting and lowering operation of the lock body 6. As the operating element 5 advances and retreats between the lock position (I) and the non-lock position (J), the lock body 6 rotates the roller 3 and the turn base 2. It is set so that it can operate between an engagement position (K) that prohibits the turn operation and a non-engagement position (L) that allows the rotation of the roller 3 and the turn operation of the turn base 2.

  The actuator 5 is in the form of an elongated block that is positioned on the rail wall 15 disposed on the top wall 11 of the support 1 and is disposed on the top surface of the top wall 11 so as to be able to advance and retreat in the horizontal direction. A push button mounting portion 51 is provided at the end, and a connecting rod mounting portion 52 is provided at the inner end. The push button mounting portion 51 includes a receiving plate 55 that protrudes integrally from the outer end surface of the actuator 5, and a bolt insertion hole h <b> 2 provided in the receiving plate 55. The connecting rod mounting portion 52 includes a prismatic protrusion t2 protruding from the inner end surface of the actuator 5 and a female screw hole h3 formed in the protrusion t2. A cam groove 71 and a cam plate holding portion 54 are formed on the lower surface of the actuator 5. Note that a retaining protrusion t1 for preventing the operating element 5 from separating from the support 1 is formed on the opposing inner surface of the rail wall 15 that can support the operating element 5 so as to be slidable. The actuator 5 is elastically biased outward by a spring for biasing the actuator 5 (not shown) arranged between the support body 1 and the support body 1.

  The lock body 6 has a base 61 having a cam follower 66 on its upper surface, and a roll lock that engages with any of the engagement recesses 34 provided in the base 61 and provided in the roller 3 at the engagement position (K). A claw 63, and side and end turn lock claws 64, 65 which are provided in the base 61 and engage with any of the engagement recesses h1 provided in the support 1 at the engagement position (K). It is equipped with.

  The base 61 is plate-shaped and has a spring retainer 67 on the lower surface. That is, the base 61 is elastically biased upward by a coil spring 62 having an upper end engaged with the spring retainer 67. That is, a spring retainer 41 that engages with the lower end of the coil spring 62 is formed on the upper surface of the cover 4, and the coil spring 62 is interposed between the cover 4 and the lock body 6. An arm 68 extending to both sides of the roller 3 is formed on the end surface of the base 61 on the roller 3 side, and the roll lock claw 63 is provided on the inner surface of the tip of the arm 68.

  In a state where the lock body 6 is lowered to the non-engagement position (L), the roll lock claw 63 stands by at a position where it is disengaged from the engagement recess 34 of the roller 3. In a state where the spring 62 is raised to the engagement position (K) by the urging force of the spring 62, it can be engaged with any of the engagement recesses 34 of the roller 3.

  The side turn lock claws 64 are provided on both side portions of the base portion 61 and can be slidably contacted with the guide groove 25 of the turn base 2 and guided in the vertical direction. Further, a turn lock claw 65 at the end is provided at the end of the base 61 on the side opposite to the roller. The side and end turn lock claws 64 and 65 stand by at a position disengaged from the engagement recess h1 of the support 1 when the lock body 6 is lowered to the non-engagement position (L). In the state where the lock body 6 is raised to the engagement position (K) by the urging force of the coil spring 62, the lock body 6 protrudes upward from the lock claw penetration window 24 in the turn base 2 and the ceiling wall in the support body 1 11 is engaged with any one of the engagement recesses h1 formed in 11.

  The cam mechanism 7 includes the cam groove 71 provided on the lower surface of the actuator 5, and the tip provided on the lock body 6 passes through the top wall 21 of the turn base 2 and the top wall 11 of the support 1. And a cam follower 66 having a column shape engaged with the cam groove 71.

  The cam groove 71 extends along the advancing / retreating direction of the actuator 5, and the shallow groove portion 72 and the deep groove portion 73 are provided adjacent to each other in the advancing / retreating direction of the actuator 5 via a gentle stepped portion 74. ing. In the state where the actuator 5 is in the locked position (I), the deep groove portion 73 of the cam groove 71 is set to be located immediately above the boss portion 14 in the support 1. In the state where the actuator 5 is in the unlocked position (J), the shallow groove portion 72 of the cam groove 71 is set to be positioned immediately above the boss portion 14 in the support 1.

  The cam follower 66 is a shaft-shaped member integrally projecting upward from the base portion 61, and penetrates the boss portion 23 of the turn base 2 and the boss portion 14 of the support 1, and the tip portion thereof is the cam groove 71. Is involved in. As shown in FIG. 9, when the cam follower 66 is engaged with the deep groove 73 in the cam groove 71, the lock body 6 is held at the engagement position (K), as shown in FIG. In addition, when the cam follower 66 is engaged with the shallow groove portion 72 of the cam groove 71, the lock body 6 is pushed down to the non-engagement position (L) against the urging force of the coil spring 62. It has become.

  The operation unit M receives a pressing operation force in a substantially horizontal direction and uses the pressing operation force to operate the operating element 5, and a pressing operation force in one direction is applied to the push button 8. A heart cam mechanism 9 as a selective holding mechanism for alternately holding the operating element 5 at the locked position (I) or the unlocked position (J) is provided.

  The push button 8 is disposed in the vicinity of the use end of the leg base d1. Specifically, the push button 8 is disposed so as to protrude and retract in a window d11 provided in the leg base d1. The push button 8 is provided on the outer end of the actuator 5. That is, the push button 8 has a form that does not excessively protrude from the window d11 of the leg base d1 at the lock position (I), and is attached to the push button attachment portion 51 of the actuator 5 on the back surface thereof. A mounting protrusion 81 is provided. The mounting protrusion 81 includes a bolt insertion hole h3 that matches the bolt insertion hole h2 of the push button mounting portion 51, and a nut n1 that is embedded in the upper end portion of the bolt insertion hole h3 so that its axis is aligned. I have. The push button 8 is attached to the operating element 5 by screwing and tightening the bolt v1 inserted from the bolt insertion hole h2 of the operating element 5 to the nut n1.

  The heart cam mechanism 9 is provided between the operating element 5 and the support body 1 and is held so as to be slidable in a direction orthogonal to the advancing / retreating direction of the operating element 5 and having a heart cam groove mz on the lower surface. A plate 91, a follower pin 92 mounted on the bulging portion of the support 1, and a spring 93 that elastically urges the follower pin 92 upward and always engages the upper end portion of the follower pin 92 with the heart cam groove mz. It has. That is, the heart cam mechanism 9 is provided with a follower pin 92 held on the support 1 that does not operate in accordance with the operation, and the cam plate 91 having the heart cam groove mz moves in the operation direction and The selective holding function is exhibited by operating in a direction orthogonal to the operation direction.

  More specifically, the cam plate 91 is a flat plate having a rectangular shape in plan view, and is provided with a notch 94 whose inner end is a thin portion. Further, on the inner end face and the outer end face of the cam plate 91, a friction reducing ridge 95 extending in the left-right direction is formed. The cam plate holding portion 54 in the operating element 5 is formed by recessing the lower surface of the operating element 5 so as to form a rectangular shape in a bottom view, and between the front and rear inner surfaces that form the recessed portion. The distance substantially corresponds to the dimension of the cam plate 91 in the front-rear direction, that is, the distance between the front and rear protrusions 95 of the cam plate 91. On the other hand, the distance between the left and right inner surfaces facing each other of the cam plate holding portion 54 in the actuator 5 is set to be larger than the horizontal dimension of the cam plate 91, and the cam plate 91 has the front and rear protrusions 54. It is set so that it can slide within a certain range in the left-right direction within the cam plate holding portion 54 while being in sliding contact with the front and rear inner surfaces. The cam plate holding portion 54 extends inward from the rear inner surface, and is provided with a drop prevention hook 56 that engages with the notch portion 94 of the cam plate 91 to prevent the cam plate 91 from falling. Yes.

  The heart cam groove mz has a heart-shaped orbit in a bottom view, and a lock part m1 provided at a place where the orbit is constricted, and the lock part m1 continuously from the start end via the first step part s1. A release portion m2 that gradually decreases toward the end, a guide portion m3 that continues to the end of the release portion m2 via the second step portion s2, and that gradually decreases from the start end toward the end, and at the end of the guide portion m3 A locking part m4 for locking the cam plate 91 inwardly beyond a certain distance by the follower pin 92 through the third step part s3, and the locking part m4 and the locking part m1 And a fourth step portion s4 provided between the two. As shown in FIG. 7, the follower pin 92 relatively circulates in the heart cam groove mz along the arrow A direction. The first, second, third, and fourth step portions s1, s2, s3, and s4 are set so that the end faces for forming each step face the traveling direction, and the follower pin 92 is an arrow A. It is guided not to move in the opposite direction.

  The follower pin 92 includes a shaft-shaped follower pin main body 96 that is fitted in a shaft holding hole 18 formed in the bulging portion 13 of the support body 1 so as to be able to move up and down, and projects from the upper end of the follower pin main body 96 to form the heart cam groove. A tip 97 that is always engaged with mz, and a spring retainer 98 that projects from the lower surface of the follower pin 92 are provided. A spring 93 is interposed between the follower pin 92 and the bottom surface of the shaft holding hole 18, and the follower pin 92 is elastically biased toward the cam plate 91 by the spring 93.

  Next, the second caster F will be described. In addition, about the code | symbol of the 2nd caster F, what attached | subjected "'" after the code | symbol used in the 1st caster E is used, and detailed description may be abbreviate | omitted.

  In the second caster F, a turn base 2 'is held on a support 1' attached to the leg base d1 on the opposite end side of the leg base d1 so that the turn base 2 'can be turned horizontally. Between the caster body G ′ on which the roller 3 ′ is pivoted and the lock position (I) for locking the movement of the caster body G ′ to the unlocked position (J) for releasing the lock. It comprises a lock portion H ′ having an operating element 5 ′ that operates in the horizontal direction. That is, the second caster F is different from the first caster E in that the operation part M is not provided and in terms of the structure of the actuator 5 ′ of the lock part H ′. The caster body G ′ and the caster body G in the first caster E have the same configuration.

  The lock portion H ′ is for locking the movement of the caster main body G ′, and is held by the support 1 ′, and the lock position (I) according to the operation of the first caster E on the push button 8. And an unlocking position (J) between the actuator 5 ′ for moving forward and backward, a lock body 6 ′ held up and down in the turn base 2 ′, and the movement of the actuator 5 ′. A cam mechanism 7 ′ for converting the lifting and lowering operation of the lock body 6 ′. As the actuator 5 ′ moves forward and backward between the locked position (I) and the unlocked position (J), The lock body 6 'permits the rotation of the roller 3' and the turn position of the turn base 2 ', and the non-permitting position (K) for allowing the rotation of the roller 3' and the turn operation of the turn base 2 '. It can operate between engagement positions (L) They are set to.

  The actuator 5 ′ is in the form of an elongated block that is positioned on a rail wall 15 ′ disposed on the top wall 11 ′ of the support 1 ′ and is disposed on the top surface of the top wall 11 ′ so as to be able to advance and retract in the horizontal direction. This is provided with a connecting rod mounting portion 52 ′ at the inner end. The connecting rod mounting portion 52 'includes a prismatic protrusion t2' protruding from the inner end surface of the actuator 5 'and a female screw hole h3' formed in the protrusion t2 '. A cam groove 71 'is formed on the lower surface of the actuator 5'. The cam groove 71 'has a different configuration from the cam groove 71 of the first caster E, as will be described later.

  The lock body 6 ′ has the same configuration as the first caster E.

  The cam mechanism 7 ′ includes the cam groove 71 ′ provided on the lower surface of the operating element 5 ′ and the tip of the top base 11 of the turn base 2 ′ and the support 1 ′ provided on the lock body 6 ′. A cam follower 66 ′ that passes through and engages with the cam groove 71 ′ is provided, and only the cam groove 71 ′ is different from the cam groove 71 of the first caster E.

  That is, the cam groove 71 ′ extends along the direction in which the operating element 5 ′ advances and retreats, and the shallow groove part 72 ′ and the deep groove part 73 ′ are formed on the operating element 5 ′ via the gentle step part 74 ′. Adjacent to the advance and retreat direction. In the state where the actuator 5 'is in the locked position (I), the deep groove 73' of the cam groove 71 'is set to be located immediately above the boss 14' in the support 1 '. In a state where the actuator 5 'is in the unlocked position (L), the shallow groove portion 72' of the cam groove 71 'is set to be positioned immediately above the boss portion 14' of the support 1 '. In the first caster E, the shallow groove portion 72 is located on the inner end side and the deep groove portion 73 is located on the outer end side, whereas in the second caster F, The shallow groove portion 72 ′ is located on the outer end side, and the deep groove portion 73 ′ is located on the inner end side. Therefore, even if the operator 5 of the first caster E and the operator 5 'of the second caster F are directly connected by the connecting rod N, the lock bodies 6 and 6' of both casters E and F are engaged in synchronization. It operates between the combined position (K) and the disengaged position (L).

  The connecting rod N is formed by bending a square pipe material so as to correspond to the shape of the leg base d1, and one end is externally fitted to the projection t2 of the connecting rod mounting portion 52 of the first caster E, and the other end is the second. The second caster F is screwed by being externally fitted to the protrusion t2 ′ of the connecting rod mounting portion 52 ′.

  Next, the operation of the first caster E will be described with reference to FIGS. 7 is a bottom view of the cam plate 91, and an imaginary line drawn in the cam groove 71 indicates the track of the tip of the follower pin 92. FIG. FIG. 8 is a perspective view of the cam plate 91 as seen from the bottom side. FIGS. 9 to 11 schematically show the side cross sections of the first and second casters in FIG. 9A with only the main part taken out. FIG. 9B schematically shows the flat cross section corresponding to FIG. Is shown.

  1-4 and FIG. 9 have shown what the locking part H in the 1st caster E is maintained in the locked state. In this locked state, as shown in FIG. 9 (a), the lock body 6 of the lock portion H is raised to the engagement position (K), and the roll lock claw 63 becomes one of the engagement recesses 34 of the roller 3. Is engaged. Therefore, the rotation of the roller 3 is prohibited. Further, the turn lock claws 64, 65 of the lock body 6 penetrate through the lock claw penetration window 24 of the turn base 2 and engage with one of the engagement recesses h 1 of the support body 1. Therefore, turning of the turn base 2 with respect to the support 1 is prohibited. That is, the movement of the caster body G is maintained in a locked state. In this state, as shown in FIG. 7 and FIG. 9B, the follower pin 92 of the heart cam mechanism 9 is positioned at the lock portion m1 of the heart cam groove mz, and the cam plate 91 and the cam plate 91 The actuator 5 that holds the valve is prohibited from moving outward by the biasing force of a spring (not shown). That is, the operating element 5 is held at the locked position (I) by the heart cam mechanism 9. In the locked position (I), the push button 8 attached to the operating element 5 is substantially immersed in the window d11 of the leg base d1.

  When the push button 8 is pushed inward from this locked state, the follower pin 92 of the heart cam mechanism 9 is guided to the fourth step s4 as shown in FIGS. 7 and 10B. While passing through the first step portion s1, it moves relative to the starting end p1 of the release portion m2. This relative movement is performed while the cam plate 91 moves in the left-right direction with respect to the actuator 5. FIG. 10 shows the most pushed state in which the follower pin 92 has moved to the start end p1 of the release portion m2 of the heart cam groove mz.

  When the pushing operation on the push button 8 is stopped in the most pushed state, the actuator 5 moves from the locked position (I) to the unlocked position (J) by the biasing force of the spring. As a result, as shown in FIG. 11, the cam follower 66 is engaged with the shallow groove portion 72 of the cam groove 71 in the operating element 5, and the lock body 6 resists the urging force of the spring 62. ) To the non-engagement position (L). Therefore, as shown in FIG. 11A, the roll lock claw 63 of the lock body 6 is disengaged from the engagement recess 34 of the roller 3, and the rotation of the roller 3 is allowed. Further, the turn lock claw 63 of the lock body 6 is lowered to be disengaged from the engagement recess h1 of the support body 1, and the turn base 2 is allowed to turn with respect to the support body 1. In this way, when the most pushed state shown in FIG. 10 is shifted to the non-locked state shown in FIG. 11, the follower pin 92 of the heart cam mechanism 9 has a release portion m2 of the heart cam groove mz as shown in FIG. Relative to the terminal end p2, passes through the second step portion s2, and reaches the starting end p3 of the guide portion m3. This relative movement is performed while the cam plate 91 moves in the left-right direction with respect to the actuator 5. FIG. 10B shows the most pushed state in which the follower pin 92 is positioned at the start end of the release portion m2 of the heart cam groove mz. FIG. 11B shows the guide portion of the heart cam groove mz. The non-locked state reaching m3 is shown.

  In this unlocked state, the push button 8 protrudes from the use end of the leg base d1.

  When a push operation is applied to the push button 8 from this unlocked state, the actuator 5 moves from the unlocked position (J) to the locked position (I) against the biasing force of a spring (not shown). Thus, the locked state is restored again at the locked position (I). That is, when a pushing operation force is applied to the push button 8 from the unlocked state (J) shown in FIG. 11, the cam plate 91 moves inward with respect to the follower pin 92, and the follower pin 92 moves to the guide portion m3 of the heart cam groove mz. Relative movement from the start end p3 toward the end p4 passes through the third step portion s3 and reaches the locking portion m4. When the push-in operation on the push button 8 is stopped from this state, the cam plate 91 moves slightly outward together with the actuator 5 due to the spring force, and the follower pin 92 moves from the locking portion m4 of the heart cam groove mz to the fourth position. It passes through the step portion s4 and reaches the lock portion m1.

  As described above, the table A with a flap top plate according to the present embodiment is provided with the first and second casters E and F on the leg base d1 of the table body B. The first caster E is a caster main body G in which a turn base 2 is held on a support 1 attached to the table main body B so that the turn base 2 can be turned horizontally, and a roller 3 is pivotally supported at an eccentric position of the turn base 2. And a lock portion H having an actuator 5 that operates between a lock position (I) for locking the movement of the caster body G and an unlock position (J) for releasing the lock, And an operation unit M for operating the actuator 5 of the lock unit H to switch the lock unit H to a locked state or an unlocked state. Then, the operation unit M receives a pressing operation force in a substantially horizontal direction and operates the operating element 5 using the pressing operation force, and the pressing button 8 has a pressing operation force in one direction. A heart cam mechanism 9 that alternately holds the operating element 5 in the locked position or the unlocked position each time it is added. For this reason, the caster E excellent in operativity and the table A with a flap top plate which has the said caster E can be provided. That is, since the push button 8 that receives a pressing operation force in a substantially horizontal direction and receives the pressing force operation force to actuate the operating element 5 is provided, it is easy for the user to see and there is no sense of incongruity. Operation can be realized. For example, in the case where the push button 8 is operated using a foot part that can be directly visually recognized by the user, the foot part can be accurately accessed with respect to the push button 8. Therefore, the caster E can be comfortably locked and unlocked.

  The table body B includes a leg base d1 extending in the front-rear direction, the caster E is provided on the use end side of the leg base d1, and the push button 8 is connected to the leg base. It is arranged near the use end of d1. For this reason, the user can suitably access the push button 8.

  The leg base d1 has a channel-like shape opened downward with a window d11 at the use end, and the push button 8 is disposed so as to be able to project and retract in the window d11. For this reason, the caster E can be suitably attached to the leg base d1.

  The caster body G has a support body 1 in which a cylindrical peripheral wall 12 is suspended from the lower surface of the top wall 11, a turn base 2 accommodated in the support body 1 so as to be horizontally rotatable, and the turn base 2 And a roller 3 that is pivotally supported via a horizontal axis j1 at a position displaced from the pivot axis, and the lock portion H is held by the support 1 and is used for the operation on the push button 8. Accordingly, the actuator 5 that moves forward and backward between the lock position (I) and the non-lock position (J), the lock body 6 that is held up and down in the turn base 2, and the actuator 5 And a cam mechanism 7 for converting the forward / backward movement of the lock body 6 into the lifting / lowering movement of the lock body 6, and as the actuator 5 moves back and forth between the locked position (I) and the unlocked position (J). The lock body 6 rotates the roller 3 and It is set so that it can operate between an engagement position (K) that prohibits the turn operation of the base 2 and a non-engagement position (L) that allows the rotation of the roller 3 and the turn operation of the turn base 2. Yes. For this reason, the suitable structure which can lock or unlock collectively the rotation operation | movement of the roller 3 in the caster E and the turning operation | movement with respect to the support body 1 of the turn base 2 in the caster E can be provided.

  The cam mechanism 7 is provided with a cam groove 71 provided on the lower surface of the operating element 5, and the tip provided on the lock body 6 passes through the turn base 2 and the top walls 21, 11 of the support body 1. A cam follower 66 that engages with the cam groove 71 is provided. Therefore, it is possible to provide a suitable mode in which the lock body 6 is engaged with the actuator 5 on the support body 1.

  The lock body 6 has a base 61 having the cam follower 66 on the upper surface, and a roll lock claw 63 that is provided in the base 61 and engages with the engagement recess 34 provided in the roller 3 at the engagement position (K). And turn lock claws 64 and 65 which are provided in the base 61 and engage with an engagement recess h1 provided in the support 1 at the engagement position (K). For this reason, the lock body 6 can provide a suitable mode in which not only the rotation lock of the roller 3 but also the turn lock of the turn base 2 can be performed.

  The operating element 5 is held by the support 1 and moves forward and backward in the horizontal direction, and the push button 8 is provided at an outer end of the operating element 5. A heart cam mechanism 9 is provided between the support 1 and the support 1. For this reason, the operation force is suitably transmitted by the operation of the push button 8, and the on / off of the lock can be suitably switched by repeating the pushing operation in one direction.

  The table body B is provided with a leg base d1 extending in the front-rear direction, and the operating element 5 is held by the support body 1 to advance and retreat in the horizontal direction, and the use end of the leg base d1 The caster E provided with the operation unit M is provided on the side, and the turn base 2 'can be horizontally turned on the support 1' attached to the leg base d1 on the opposite side of the leg base d1. The caster body G ′ in which the roller 3 ′ is pivotally supported at the eccentric position of the turn base 2 ′, and the lock position (I) for locking the movement of the caster body G ′ to release the lock. There is provided a caster F on the counter-use end side provided with a lock portion H ′ having an operating element 5 ′ that operates in the horizontal direction until the non-lock position (J). In front of caster F Actuator 5 'to be operatively connects the actuator 5 of the use end of the caster E via a connecting rod N. Therefore, both the first and second casters E and F can be operated by operating the push button 8 on one side.

  The operating element 5 of the caster E on the use end side and the operating element 5 'of the caster F on the non-use end side are directly connected by a single connecting rod N. Therefore, it is possible to operate both the first and second casters E and F by operating the push button 8 on one side without constructing a complicated mechanism in the leg base d1.

  The present invention is not limited to the embodiment described in detail above.

  Various types of furniture with casters are conceivable, and are not limited to furniture with a flap top plate as shown in the present embodiment.

  The actuator is not necessarily limited to the one that slides in the horizontal direction.

  The selective holding mechanism is not limited to the heart cam mechanism, and may be any mechanism that can alternately hold the operating element at the locked position or the non-locked position each time a pressing operation force in one direction is applied.

  In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Support body 2 ... Turn base 3 ... Roller 8 ... Push button A ... Table with a flap top plate (furniture with a caster)
B ... Table body (furniture body)
E ... First caster G ... Caster body H ... Lock part M ... Operation part

Claims (10)

It is a furniture with casters provided with casters at the bottom of the furniture body,
In order to lock the movement of the caster body, the caster body has a turn base supported by a support attached to the furniture body so that the turn base can be horizontally rotated and a roller is pivotally supported at an eccentric position of the turn base. A lock portion having an actuator that operates from a lock position to an unlock position for releasing the lock, and operating the actuator of the lock portion to bring the lock portion into a locked state or an unlocked state. And an operation unit for switching,
The operation unit receives a pressing operation force in a substantially horizontal direction and operates the operating element using the pressing operation force, and each time a pressing operation force in one direction is applied to the push button, A caster-equipped furniture comprising a selective holding mechanism that alternately holds an actuator in the locked position or the non-locked position. The furniture body includes a leg base extending in the front-rear direction,
The caster is provided on the use end side of the leg base,
The furniture with casters according to claim 1, wherein the push button is arranged in the vicinity of a use end of the leg base. The leg base has a channel-like shape opened downward with a window at the use end,
The furniture with casters according to claim 2, wherein the push button is disposed so as to be able to project and retract in the window. The caster body is deviated from a support body in which a cylindrical peripheral wall is suspended on the lower surface of the top wall, a turn base accommodated in the support body so as to be horizontally rotatable, and a turn axis of the turn base. With a roller that is pivotally supported via a horizontal axis at the site,
The lock portion is held by the support body and is operated to move back and forth between the lock position and the non-lock position according to an operation on the push button, and is held up and down in the turn base. A lock body, and a cam mechanism for converting the advance / retreat operation of the operating element into an ascending / descending operation of the lock body, and as the actuator advances / retreats between a locked position and an unlocked position, The lock body is set to be operable between an engagement position that prohibits rotation of the roller and the turn operation of the turn base and a non-engagement position that allows rotation of the roller and the turn operation of the turn base. The furniture with casters according to claim 1, 2 or 3. The cam mechanism includes a cam groove provided on a lower surface of the actuator, and a cam follower provided on the lock body and having a tip portion penetrating the top wall of the turn base and the support body and engaging with the cam groove. The furniture with casters according to claim 4, wherein the furniture is provided. The lock body includes a base portion having the cam follower on an upper surface, a roll lock claw provided at the base portion and engaged with an engagement recess provided at the roller at the engagement position, and the engagement portion provided at the base portion. The furniture with casters according to claim 4 or 5, further comprising a turn lock claw that engages with an engagement recess provided in the support body at a joint position. The actuator is held by the support and is advanced and retracted in the horizontal direction;
The push button is provided at an outer end of the actuator;
The furniture with casters according to claim 1, wherein the selective holding mechanism is a heart cam mechanism provided between the operating element and the support body. The furniture body includes a leg base extending in the front-rear direction,
The actuator is held by the support and is advanced and retracted in the horizontal direction;
The caster provided with the operation portion is provided on the use end side of the leg base, and the turn base is held on a support body attached to the leg base on the non-use end side of the leg base so as to be horizontally rotatable. It operates horizontally between the caster body in which the roller is pivotally supported at the eccentric position of the turn base and the locked position for locking the movement of the caster body to the unlocked position for releasing the lock. A caster on the counter-use end side provided with a lock portion having an actuator is provided, and the caster on the counter-use end side and the actuator on the caster on the use end side are connected to each other. The furniture with a caster according to claim 1, wherein the furniture is linked so as to be interlocked with each other. The furniture with casters according to claim 8, wherein the operating element of the caster on the use end side and the operating element of the caster on the non-use end side are directly connected by a single connecting rod. A caster used by being attached to furniture,
A caster body in which the turn base is held horizontally by the support and a roller is pivotally supported at an eccentric position of the turn base, and a lock position for unlocking the movement of the caster body is used to release the lock. A lock part having an actuator that operates until the unlocked position, and an operation part for operating the actuator of the lock part to switch the lock part to a locked state or an unlocked state,
The operation unit receives a pressing operation force in a substantially horizontal direction and operates the operating element using the pressing operation force, and each time a pressing operation force in one direction is applied to the push button, A caster comprising: a selective holding mechanism that alternately holds the actuator in the locked position or the non-locked position.

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