JP4827474B2 - Lifting device, wagon with lifting table - Google Patents

Description

  The present invention relates to a lifting device that can lift and lower furniture components such as a lifting table with respect to a furniture body such as a housing, and a wagon with a lifting table that includes the lifting device.

Conventionally, as an elevating device applied to a wagon with a top plate provided with a case and an elevating top plate that is provided on the upper surface side of the case and whose height position can be adjusted with respect to the case, for example, As shown in the following Patent Document 1, a ratchet (corresponding to a first meshing portion) in which a plurality of tooth portions are formed on the outer periphery of a stationary member provided in a housing, and a piece piece biased in a direction of meshing with the ratchet (Corresponding to the second meshing portion) and a meshable position where the piece piece can be engaged with the ratchet by the operation of an interlocking member that moves up and down in conjunction with the application or stoppage of a predetermined operating force, and the engagement state There is known a device that is selectively engaged with a ratchet by advancing and retreating to and from the disengagement position for releasing.
Japanese Patent No. 3355945 (FIGS. 12 and 13, etc.)

  However, in such a conventional lifting device, when the piece piece is positioned at the engageable position, a single claw (tooth portion) provided at the tip portion of the piece piece has a plurality of pieces provided in the rotating ratchet. It is an aspect that engages only with a single tooth part among the tooth parts, that is, an aspect in which only single tooth parts are engaged with each other. Also, the engagement depth is set deep enough to prevent the engagement state from being easily released. For this reason, the pitch of the ratchet teeth must be set to be somewhat large (for example, several tens of mm), and as a result, the height adjustment of the elevating top plate also corresponds to the pitch of the ratchet teeth (several tens of mm). It can only be performed in units of mm), and the height position of the lifting table cannot be finely adjusted in units of several millimeters so that it is substantially flush with the height position of the table top. A problem occurs.

  Such a problem is an aspect in which a first engagement portion having a plurality of grooves along the height direction is provided on the elevating member, and a single pin that selectively engages the grooves is provided on the stationary member. Also occurs in the same way.

  The present invention has been made by paying attention to such problems, and the main purpose is to finely adjust the height position of furniture components such as a lifting table while ensuring a good meshing state. Is to provide a simple lifting device.

That is, the lifting device of the present invention is a lifting device capable of lifting and lowering a furniture constituent member such as a lifting table with respect to a furniture body such as a housing, the stationary member provided on the furniture body, and the stationary member An elevating member that moves up and down with respect to the furniture and supports the furniture component, and a locked state that is provided between the stationary member and the elevating member and restricts the elevating movement of the elevating member A first meshing portion having a plurality of first tooth portions provided at predetermined intervals along the height direction of the stationary member. And a second meshing portion having a plurality of second tooth portions provided at predetermined intervals along the height direction of the elevating member, and the plurality of first tooth portions and the plurality of first teeth in the locked state. If another is meshed and two teeth DOO And a relative displacement restricting means for restricting relative displacement of the first meshing portion and the second meshing portion in the thickness direction at least when the meshing mechanism is in the locked state. The two meshing portions are capable of moving back and forth between a meshable position that can mesh with the first meshing portion and a mesh release position that can cancel the meshing state with the first meshing portion, and the relative displacement When the restricting means uses a clamping member that can clamp at least the second meshing part with the inner surface part of the elevating member, and the first meshing part is positioned at the meshing position, the first Restricting relative displacement of the first meshing portion and the second meshing portion in the thickness direction by sandwiching the meshing portion and the second meshing portion between the inner surface portion of the elevating member and the clamping member It is characterized by being.

  Here, examples of the furniture main body include a casing (wagon), a chair main body, and the like, and examples of the furniture constituent member include an elevating table and an armrest that can be moved up and down with respect to the casing and the chair main body.

  In such a case, since the plurality of first tooth portions and the plurality of second tooth portions mesh with each other in the meshing state (locking state of the meshing mechanism), the conventional single teeth Compared with the mode of meshing, it is possible to realize a better meshing state, and furthermore, sufficient load resistance even when the pitch of each of the first tooth part and the second tooth part is set small Sex can be secured. As a result, the respective pitches of the first tooth portion and the second tooth portion are set to be small, and the height position of the elevating top plate is substantially flush with the height position of the top plate of a desk or the like used in combination. Can be adjusted in units of several millimeters. In addition, since a plurality of tooth portions are provided along the height direction of the stationary member or the elevating member, the plurality of tooth portions can be reliably meshed with each other as compared with the ratchet type meshing mechanism.

Also, at least when the engagement mechanism is in the locked state, the first engagement portion and the second engagement portion is not provided with a relative displacement regulating means for regulating that relative displacement in the thickness direction Runode, these Deterioration of the meshing state between the first meshing portion and the second meshing portion, which can be caused by relative displacement (surface displacement) in the thickness direction of the first meshing portion and the second meshing portion, can be effectively solved.

Further, the second meshing portion can move forward and backward between a meshable position where the second meshing portion can mesh with the first meshing portion and a mesh release position where the meshing state with the first meshing portion can be released. The relative displacement regulating means uses a clamping member that can clamp at least the second meshing portion with the inner surface of the elevating member, and the second meshing portion is positioned at the meshable position. The first meshing part and the second meshing part are relatively displaced in the thickness direction by sandwiching the first meshing part and the second meshing part between the inner surface part of the elevating member and the clamping member. Therefore, even if the first meshing portion and the second meshing portion are thin plate-like, the relative surface deviation is prevented by sandwiching each meshing portion while acting a simple structure. And a good meshing state can be maintained. In addition, the aspect which provided the 2nd meshing part directly in the inner surface part of the raising / lowering member, or what provided indirectly through the predetermined member may be sufficient.

In particular, the second meshing portion is attached to a slider member that is slidably movable on the lifting member, and the meshing position between the meshing position that can mesh with the first meshing portion and the first meshing portion is released. The relative displacement regulating means uses a clamping member that can clamp at least the second meshing portion with the slider member. When the second meshing portion is positioned at the meshable position, the first meshing portion and the second meshing portion are sandwiched between the slider member and the sandwiching member, thereby der those second engagement portion restricts that relative displacement in the thickness direction lever, can be moved in the second engagement portion by using the slider member smoothly and properly.

  If the relative displacement restricting means can release the clamping state of the first meshing portion when the second meshing portion is positioned at the meshing release position, the second meshing portion meshes. In the unlocked state positioned at the release position, the first tooth portion does not interfere with the slider member and the interlocking member, so that the lifting member can be smoothly moved up and down.

  In addition, the second meshing portion is attached to a slider member that is slidably movable on the lifting member, and the meshing position between the meshing position that can mesh with the first meshing portion and the first meshing portion is released. Of the interlocking member that can slide with the slider member between the meshing release positions that can be moved and that moves up and down relative to the second meshing part and the slider member in conjunction with the application or stoppage of a predetermined operating force. If there is provided a motion conversion means for converting the operation into the movement of the second meshing portion from the meshable position to the meshing release position or the forward / backward movement from the meshing release position to the meshable position, this motion conversion is provided. The second engagement portion can be accurately advanced and retracted using the means, and the second engagement portion can be smoothly moved by the slider member.

  As a specific embodiment of the motion converting means, the motion converting means comprises the interlocking member and a connecting member that connects the interlocking member and the slider member, and the interlocking member or the connecting member One of the guide grooves is provided, and the other is provided with a guide protrusion that can move along the guide groove. The guide protrusion is formed into the guide groove based on the up-and-down movement of the interlocking member. An example is one in which the second meshing portion is moved from the meshable position to the meshing release position or from the meshing release position to the meshable position through the connecting member by being guided.

  In this case, if a plurality of the guide grooves are provided in one of the interlocking member or the connecting member, and a plurality of the guide protrusions are provided in the other corresponding to the guide grooves, reliable operation conversion is achieved. Contributes to improvement of performance.

  As another specific embodiment of the motion converting means, the motion converting means uses the slider member and an interlocking member, and a predetermined one of the side edges of the slider member is provided along the height direction thereof. A first inclined portion that is inclined at an angle is provided, and one of the side edge portions of the interlocking member that is opposed to one side edge portion of the slider is arranged along the height direction of the first inclined portion. A second inclined portion corresponding to the first and second inclined portions is slid relative to each other based on the up-and-down movement of the interlocking member, thereby releasing the second meshing portion from the meshable position. Examples include those that are moved to a position or from the mesh release position to the meshable position. Even in such a mode, the movement between the meshable position of the second meshing portion and the mesh release position can be reliably performed with a simple configuration.

  Note that the motion conversion means may be composed of only one of the combination of the guide groove and the guide protrusion, the combination of the first inclined portion and the second inclined portion, or both. May be.

  Further, if the slider member and the interlocking member are made of a synthetic resin material, each member is moved or stopped as compared with the case where the slider member and the interlocking member are made of a metal material or the like. Impact noise and friction noise that can sometimes occur can be reduced.

  In order to smoothly and accurately engage and disengage the first meshing portion and the second meshing portion, the protruding direction of each tooth portion of the first meshing portion and the second meshing portion is determined by the stationary member. Or what is necessary is just to set to the direction slightly inclined with respect to the virtual straight line orthogonal to the height direction of the said raising / lowering member.

  Furthermore, the wagon with a lifting / lowering top plate according to the present invention includes a housing that is a furniture body, a lifting / lowering top plate that is attached to the housing and whose height position can be adjusted, and the lifting / lowering table with respect to the housing. The above-described lifting device that can lift and lower the top plate is provided, and the same effect as that of the lifting device described above can be obtained, which is excellent in practicality.

  As described above, according to the present invention, in the meshing state (locking state of the meshing mechanism), the plurality of first tooth portions and the plurality of second tooth portions mesh with each other, so that the load resistance is excellent. A good meshing state can be realized, and even if the respective pitches of the first tooth portion and the second tooth portion are set small, the good meshing state is not impaired. As a result, the height position of the furniture constituent member with respect to the furniture body can be adjusted in units of several millimeters, so that it can flexibly cope with various usage modes of the user, and has excellent practicality.

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

  The elevating device D according to the present embodiment is applied to a wagon A with an elevating top plate as shown in FIG. 1 (the drawing is an overall schematic diagram in which a part of the wagon A with an elevating top plate is omitted). .

  The wagon A with a lifting table is provided with a casing B, a lifting table C provided on the top surface B2 side of the casing B and capable of moving up and down with respect to the casing B, and a lifting table C with respect to the casing B. And a lifting device D capable of lifting and lowering.

  As shown in FIGS. 1 and 2 (FIG. 2 is a partially simplified view of the plane of the housing B), the housing B has a left and right side surface portion B1, a top surface portion B2, a bottom surface portion, and a back surface. It is connected by part B3, and the accommodation space for accommodating one or more drawers BH is opened forward. A caster is provided on a bottom portion (not shown) and is configured to be horizontally movable on the floor surface. A front reinforcing portion B11 protruding inwardly at the front end portion is integrally provided on the side surface portion B1 by bending or the like, and is bent into a substantially convex shape in plan view on the rear end portion side, and the front reinforcing portion B11 is provided. A rear reinforcing portion B12 that protrudes inward substantially to the same extent is integrally provided by welding or the like, and a rail B13 (which may be a suspension rail) is placed over the front reinforcing portion B11 and the rear reinforcing portion B12. The drawer BH is slidably supported by the rail B13. And between the front reinforcement part B11 and the rear reinforcement part B12, the fixing member B14 for fixing the stationary member E mentioned later to the housing | casing B is provided. The fixing member B14 is bent into a substantially convex shape in a plan view from an attachment part B14a that can be attached to the side face part B1, and a front edge part and a rear edge part of the attachment part B14a, and the reinforcing parts B11, B12 A front edge protrusion B14b and a rear edge protrusion B14c having a protrusion dimension slightly smaller than the protrusion dimension are integrally provided, and a lifting member F described later is accommodated between the front edge protrusion B14b and the rear edge protrusion B14c. The elevating member accommodating space B14s that can be formed is formed, and is integrally provided on the side surface B1 by welding or the like. Further, in the vicinity of both side edge portions of the top surface portion B2 of the housing B, an opening portion B21 that can be inserted into the elevating member accommodating space B14s is formed. Between the inner edge of the opening B21 and the fixing member B14, a space is formed in which a main body H1 of a stationary member E described later can be inserted. In addition, the drawer BH is a well-known thing which assembled | attached the end plate to the front-end part of the container formed by opening upwards.

  The lifting / lowering top plate C has a plan view shape substantially corresponding to the plan view shape of the housing B.

  FIGS. 3 to 5 (FIGS. 3A, 3B, and 3C) are a front view, a rear view, and a side view, respectively, of the lifting device D. FIGS. FIG. 5 is an overall perspective view of the lifting device D viewed from different angles, and FIG. 5 is a sectional view taken along the line xx in FIG. E, a lifting member F that moves up and down relative to the stationary member E and supports the lifting plate C, and a locked state that is provided between the stationary member E and the lifting member F and restricts the lifting and lowering movement of the lifting member F And a meshing mechanism G that can be unlocked to allow the lifting member F to move up and down.

  The stationary member E is formed of, for example, a single sheet metal, and is mounted on the stationary member main body H that is attached to the side surface portion B1 of the housing B, and the top surface portion B2 of the housing B that is attached to the upper end portion of the stationary member main body H. And a cap member I that can be fitted into the formed opening B21.

  As shown in FIG. 6 (the figure is an overall perspective view of the stationary member main body H) and the like, the stationary member main body H mainly extends along the height direction and is a long main body having a substantially rectangular shape in front view. H1 and a part of a connecting member Q described later provided on the elevating member F can be exposed in a state where the elevating member F described later is assembled to the substantially central portion in the width direction of the main body H1. Window portion H3 that is cut out in a generally rectangular shape when viewed from the front, and the other side edge of window portion H3 from the leading edge of the upright piece that protrudes inwardly from one side edge portion of window portion H3. And a first meshing part H2 formed by providing a plurality of first tooth parts H21 protruding toward the part at predetermined intervals along the height direction. In the present embodiment, the protruding direction of the first tooth portion H21 is set to a direction slightly inclined upward with respect to a virtual straight line perpendicular to the height direction of the stationary member body H, and between the adjacent first tooth portions H21. Is set to approximately 2 mm. An inward protruding portion H11 that protrudes inward and has a cap member attachment hole H11a for attaching the cap member I is provided at the upper end portion of the main body H1. Further, a portion near the lower end of the main body H1 is cut and raised inward in a substantially L shape in plan view, thereby forming a pair of holding portions H12 that can hold the elevating member F so as to be movable up and down. . Further, an upper protrusion H13 protruding upward from other parts and a pinion round hole H14 that can be caught by a boss V1 of a synchronization pinion V described later are formed at the upper end of the main body H1. Yes.

  As shown in FIGS. 3 to 5 and the like, the cap member I is formed of, for example, a synthetic resin material, and can cover the upper surface side of the inwardly projecting portion H11 of the stationary member body H. It has a flange I2 that hangs downward from the edge of the part I1 and can elastically hold the edge of the inward protrusion H11 of the stationary member main body H. The upper surface covering portion I1 is formed with an elevating member insertion hole I1a corresponding to the cap member attaching hole H11a and through which the elevating member F can be inserted, and is suspended downward from the edge of the elevating member insertion hole I1a. A hanging portion I11 that can be fitted into the opening B21 formed in the member mounting hole H11a and the top surface portion B2 of the housing B and can be elastically engaged with each opening edge portion, and the upper protruding portion H13 of the stationary member main body H are fitted. An upper protruding portion covering portion I12 that can be covered in the combined state is provided.

  On the other hand, the elevating member F mainly includes, for example, an elevating member main body J formed by bending a sheet metal into a substantially U shape in plan view and having a height dimension larger than the stationary member main body H, and the elevating member main body J. A stay K that is provided at the upper end portion of the elevating plate and supports the elevating plate C, an operating portion L to which a predetermined operating force is applied, and a slider member that is provided in the elevating member main body J and that can slide along the width direction thereof. M, a second engagement portion N provided on the slider member M and engageable with the first engagement portion H2, and an operation force provided on the lifting member body J and applied to the operation portion L. The interlocking member P which can be moved up and down with respect to the two meshing parts N and the slider member M, and the connecting member Q which connects the slider member M and the interlocking member P are provided.

  As shown in FIG. 7 (the same figure (a), (b) is the whole perspective view which looked at the raising / lowering member main body J from each different angle) etc., the raising / lowering member main body J is in the state assembled | attached to the stationary member E. A flat plate portion J1 that can face the main body portion H1, a pair of side plate portions J2 projecting inward of the flat plate portion J1 from both side edge portions of the flat plate portion J1, and a substantially central portion in the height direction are substantially L-shaped in a side view. And a slider holding portion J3 that can be slid up and hold the slider member M so as to be slidable. In the present embodiment, two pairs of slider holding portions J3 each having a distal end extending in a direction approaching each other are provided at a predetermined interval in the width direction. It is set to be larger than the projecting dimension of each first tooth portion H21 provided in one meshing portion H2.

  The stay K is provided in the upper end part of the raising / lowering member main body J, and has a depth dimension substantially equivalent to the depth dimension of the raising / lowering top plate C (refer FIG. 1).

  As shown in FIGS. 3 to 5 and the like, the operating portion L is mainly provided at a position where the lifting lever L1 can be moved up and down relative to the lifting member main body J, and at positions that can be adjacent to both side edges of the lifting lever L1. The stationary lever L2 is immovable. The elevating lever L1 is connected to the upper end of a rod R having a lower end engaged with the interlocking member P. Further, the lifting lever L1 and the rod R are constantly urged in a direction that can be lowered together with the interlocking member P by the urging force of the spring S. The spring S has its upper end hooked to the interlocking member P and its lower end hooked to the vicinity of the lower end of the flat plate portion J1.

  As shown in FIGS. 3 to 5 and FIG. 8 (FIG. 8 is an enlarged cross-sectional view of a main part of the lifting device D) and the like, the slider member M is formed of, for example, a synthetic resin material, In the upper part and the lower edge part of the first thick part M2 and the second thick part M3 that have a thin part M1 that is set thinner than other parts in the part, and can sandwich the thin part M1 in the width direction Further, a held portion M4 that can be slidably held by the slider holding portion J3 is provided. In addition, a first concavo-convex portion M5 is formed along the height direction on one side edge of the slider member M (side edge located on the interlocking member P side in the illustrated example). The first concavo-convex portion M5 is inclined at a predetermined angle with respect to the protruding direction of the first convex portion M51 and a pair of first convex portions M51 whose protruding end portions are flat, and is continuous with each first convex portion M51. And a pair of first inclined portions M52. And in this embodiment, the 2nd meshing part N is attached to the 1st thick part M2 located in the interlocking member P side among the 1st thick part M2 and the 2nd thick part M3.

  The second meshing portion N is formed of, for example, a thin metal material, and overlaps with the superposition portion N1 that can be superposed on the first thick portion M2 and the first tooth portion H21 of the first meshing portion H2 provided on the stationary member main body H. A plurality of corresponding second tooth portions N2 are integrally provided. A plurality of second tooth portions N2 are provided along the height direction, and the direction thereof is slightly below the virtual straight line perpendicular to the height direction of the elevating member body J so as to be able to mesh with the first tooth portion H21. The distance between adjacent second teeth N2 is set to approximately 2 mm. In the present embodiment, a first horizontally elongated hole extending in the width direction and a first vertically elongated hole extending in the height direction are formed in the overlapping portion N1 of the second meshing portion N, and the first horizontally elongated hole and the first By fitting the vertically long holes to the horizontal protrusions M21 extending in the width direction and the vertical protrusions M22 extending in the height direction provided in the first thick part M2 of the slider member M, the second tooth portion The projecting direction of N2 is inclined downward. That is, the first horizontally long hole, the first vertically long hole, the horizontal protrusion M21, and the vertical protrusion M22 constitute positioning means for positioning the mounting direction of the second engagement portion N with respect to the slider member M. Further, the first thick portion M2 is provided with a female screw protruding portion M23 that protrudes outward from other portions and has a female screw portion formed in the protruding direction inside, and the second meshing portion N is attached to the slider member M. In the state, the first round hole for female screw formed in the overlapping portion N1 can be inserted into the female screw protrusion M23. And in the state which attached the 2nd meshing part N to the slider member M, the 2nd tooth | gear part N2 does not superimpose on the 1st thick part M2 of the slider member M, but a thin part toward the 2nd thick part M3 The state jumps to M1. In the present embodiment, in order to facilitate the work of holding the held portion M4 on the slider holding portion J3, the other side edge portion vicinity region (the second thick portion M3 in the illustrated example) of the slider member M is provided. A pair of elastically deformable portions M31 are provided that can be elastically deformed in the direction of mutual approach.

  The interlocking member P is formed of, for example, a synthetic resin material and has a height dimension larger than that of the slider member M, as shown in FIGS. Then, the second concavo-convex portion P1 provided along the height direction of the slider member M side and corresponding to the first concavo-convex portion M5, and the rod holding portion P2 for holding the lower end portion of the rod R. And a spring hooking portion P3 on which the upper end of the spring S can be hooked. Similarly to the first uneven portion M5, the second uneven portion P1 is inclined at a predetermined angle with respect to the pair of second protruded portions P11 whose protruding end portions are flat, and the protruding direction of the second protruded portion P11, and It has a pair of 2nd inclination part P12 which follows each 2nd convex part P11. The first inclined part Q21 and the second inclined part P12 are set so as to be parallel to each other. In addition, one side edge portion vicinity region where the second uneven portion P1 is provided is set to be thinner than other portions, and the interlocking member P and a connecting member Q described later interfere with each other in the thin region. It is made to function as the interference avoidance part P4 which avoids that the raising / lowering movement of the interlocking member P and the sliding movement of the slider member M are controlled. The interference avoiding portion P4 is provided with a pair of guide protrusions P41 that protrude outward and are guided by guide grooves Q21 of the connecting member Q described later.

  The connecting member Q is, for example, a synthetic resin material as shown in FIGS. 3 to 5 and FIG. 8 (the part surrounded by an imaginary line and attached with a pattern in FIG. 8 indicates a part of the connecting member Q). The first laterally elongated hole, the first vertically elongated hole, and the first round hole for the female screw formed in the second meshing portion N are substantially rectangular in the front view and have substantially the same height as the slider member M. Are formed with a second horizontal hole, a second vertical hole, and a second round hole for a female screw. The connecting member Q is provided with an inwardly bulging portion Q2 that is bulged inward from other portions, and guides the guide protrusion P41 of the interlocking member P to the inwardly bulging portion Q2. A pair of guide grooves Q21 to be obtained is formed. Each guide groove Q21 corresponds to the inclination angle of the first inclined part M52 and the second inclined part P12 and is separated by a predetermined dimension in the height direction, and each inclined part. It consists of an upper connection piece that connects the upper ends of the first inclined piece and the second inclined piece, and a lower connection piece that connects the lower ends of the inclined parts (the first inclined piece and the second inclined piece). It has a substantially rhombus shape when viewed from the front. In the present embodiment, the relatively high height is the first inclined piece, and the lower is the second inclined piece.

  The connecting member Q having such a configuration accommodates the guide protrusion P41 of the interlocking member P in the guide groove Q21, and the horizontal protrusion M21 of the slider member M in which the second meshing portion N is overlapped, The vertical protrusion M22 and the female screw protrusion M23 are fitted with the second horizontally long hole, the second vertical hole and the second round hole for female screw, respectively, and the screw inserted into the second round hole for female screw is the female of the female screw protruding part M23. By screwing the screw portions, the interlocking member P and the slider member M are connected to the slider member M in a connected state. In this attached state, the second meshing portion N is sandwiched between the slider member M and the connecting member Q, and each second tooth portion N2 of the second meshing portion N is covered with the connecting member Q.

  An upper half cover member T disposed at a position that can face the flat plate portion J1 of the lift member main body J is attached to the upper half portion of the lift member main body J by appropriate means, and the flat plate portion J1 and the upper half portion A synchronizing rack U provided with a plurality of engaging claws along the height direction between the cover member T and a synchronizing pinion V that can rotate while being engaged with the synchronizing rack U are accommodated. Yes. A boss portion V1 that bulges inward from other parts is provided in the central portion of the synchronization pinion V, and a shaft insertion portion V2 having a quadrangular shape in front view into which a synchronization shaft described later can be inserted is inserted into the boss portion V1. Forming. A cutout portion T1 is formed in a substantially central portion in the width direction of the upper half cover member T so as to be cut out along the height direction from the vicinity of the upper end portion to the lower end portion, and the cutout portion T1 is located at a position across the width direction. The synchronizing pinion V is arranged, and the engaging claw of the synchronizing rack U faces the notch T1. The upper half cover member T has a rack holding rib T3 for holding the synchronization rack U, a rod holding portion T4 for holding the rod R so as to be movable up and down, and a rod formed by bending the tip portion. Attaching to the rod R is abutted against a position deviation prevention portion T5 that is in contact with the bent portion R1 of the R and prevents the position deviation of the rod R with respect to the upper half cover member T, and a rod R biased downward by the spring S. A contact portion T6 for defining an initial position of the lift lever L1 is provided (see FIG. 5).

  In order to assemble such an elevating member F to the stationary member E, the orientation of the elevating member F with respect to the stationary member E is determined so that the upper half cover member T and the main body H1 of the stationary member main body H can be brought into contact with each other. Then, the elevating member F is inserted into the elevating member insertion hole I1a of the cap member I from above, and is held by a pair of holding portions H12 provided at the lower end portion of the stationary member main body H so as to be slidable. . The stationary member E and the elevating member F, which are integrally assembled in this way, are respectively inserted into the pair of openings B21 formed in the top surface portion B2 of the housing B and incorporated in the housing B, and the elevating member F is moved up and down. The state in which the main body H1 of the stationary member main body H is accommodated in the member accommodating space B14s and is brought into contact with the front edge protruding portion B14b and the rear edge protruding portion B14c of the fixing member B14 provided on the side surface portion B1 of the housing B. Attach using a predetermined mounting member such as a screw. In addition, a cut-and-raised portion is formed at a predetermined portion of the front edge protruding portion B14b and the rear edge protruding portion B14c of the fixing member B14, and the predetermined portion of the main body portion H1 of the stationary member main body H is hooked so as to be inserted into these cut-and-raised portions. Accordingly, the stationary member E and the elevating member F may be attached to the housing B. By adopting such an attachment mode, it is possible to omit or reduce the trouble of screwing. Then, on the lower surface side of the top surface portion B2 of the casing B, a rod-shaped synchronization shaft having a quadrangular shape in cross section is formed in the shaft insertion portion V2 of the synchronization pinion V that is exposed from the pinion round hole H14 of each main body portion H1. Insert the end of each. As a result, as the elevating member F moves up and down, the synchronizing pinion V sequentially engages with the engaging claws of the synchronizing rack U while rotating synchronously via the synchronizing shaft, and the pair of left and right elevating members F are synchronized. Can move up and down. In addition, while providing the buffer member W formed, for example from a synthetic resin raw material in the lower end part of the raising / lowering member main body J, the raising / lowering member F is interfered with a part of the stationary member main body H in the predetermined site | part of the raising / lowering member main body J. There is provided a movement restricting portion for restricting further upward movement or downward movement. In the present embodiment, the screw heads are protruded laterally from the side plate portion J2 in a pair of screw holes provided in the side plate portions J2 of the elevating member body J so as to be separated from each other by a predetermined distance along the height direction. A screw is screwed and the screw head of this screw is caused to interfere with the holding portion H12 of the stationary member E, thereby restricting further upward movement or downward movement of the elevating member F (not shown). 10 (a) is an enlarged perspective view of the main part of the lifting member main body J, FIG. 10 (b) is an enlarged perspective view of the main part of the stationary member main body H, and FIG. As shown in the enlarged perspective view of the main part showing the assembled state of the member main body J and the stationary member main body H), the elevating member main body J is provided with an inwardly raised and raised piece J5 which is cut and raised inward. Further, the elevating member F is further moved downward by interfering with the outer cut and raised pieces H15 formed by cutting and raising the inner cut and raised pieces J5 on the main body H1 of the stationary member main body H. You may make it regulate. In this case, a buffer member (for example, a thin plate-like rubber) may be provided on one or both of the inner cut and raised pieces J5 and the outer cut and raised pieces H15.

  Thus, in a state where the elevating member F is assembled to the stationary member E, the first meshing portion H2 of the stationary member E is formed between the first thick portion M2 and the second thick portion M3 of the slider member M of the elevating member F. The second engagement portion N is located between the slider member M and the connecting member Q so as to be slidably movable, and the first tooth portion H21 is positioned at a position facing the thin portion M1 of the slider member M. It can mesh with each second tooth portion N2. When the first meshing part H2 and the second meshing part N are meshed with each other, the lifting movement of the elevating member F is restricted, while the meshing state between the first meshing part H2 and the second meshing part N is released. In this case, the lifting / lowering member F is allowed to move up and down. That is, the first meshing portion H2 and the second meshing portion N are used to form a meshing mechanism G that can take a locked state that restricts the lifting movement of the lifting member F or a unlocked state that allows the lifting movement of the lifting member F. is doing.

  In the present embodiment, the first meshing portion H2 and the second meshing portion N are sandwiched between the slider member M and the connecting member Q in a state where the first meshing portion H2 and the second meshing portion N can be meshed with each other. Restricts relative displacement in the thickness direction (see FIG. 8). That is, the connecting member Q also functions as a “holding member” of the present invention that can hold the first engaging portion H2 and the second engaging portion N with the slider member M, and the connecting member Q and the slider member M are The “relative displacement regulating means” of the present invention is used.

  As shown in FIG. 9, the second meshing portion N releases the meshing state between the meshable position (see (a-1) in FIG. 9A) that can mesh with the first meshing portion H2 and the first meshing portion H2. When the operating force is applied to raise the lifting lever L1 of the operation portion L, the mesh releasing position is taken. When the operation force is stopped, the engagement position is set.

  Next, with reference to FIG. 9, a method and an action of moving the second meshing portion N between the meshable position and the mesh release position will be described. Note that (a-2) and (b-2) in FIG. 9 are enlarged views showing the same members (a-1) and (b-1) with the connecting member Q omitted.

  First, in order to move the second meshing portion N from the meshable position (see (a-1) in the figure) to the mesh release position (see (b-1) in the same figure), an operation of pushing up the lifting lever L1 upward. This is done by applying power. When the rod R and the interlocking member P are raised against the biasing force of the spring S in conjunction with this operating force, the height position of the interlocking member P with respect to the slider member M is displaced, and a first convex portion to be described later. The contact state between M51 and the second protrusion P11 is released, and the guide protrusion P41 provided on the interlocking member P is moved along the lower connecting piece and the first inclined piece of the guide groove Q21 of the connecting member Q. By guiding, the connecting member Q moves along the width direction in the direction approaching the interlocking member P using the interference avoiding part P4, and accordingly, the slider member M approaches the interlocking member P together with the connecting member Q. Slide along the width direction in the direction. At this time, the slider member M moves the second inclined portion P12 of the second uneven portion P1 along the direction in which the first uneven portion M5 and the second uneven portion P1 can engage with each other. The slider member M can be reliably moved by sliding on the first inclined portion M52 of the uneven portion M5. As a result, the second meshing portion N held by the slider member M cannot move in the direction approaching the interlocking member P, in other words, away from the first meshing portion H2, and cannot mesh with the first meshing portion H2. It is positioned at the mesh release position. When the second meshing portion N is positioned at the meshing release position, the connecting member Q is positioned at a position where the first meshing portion H2 cannot be covered, and the first meshing by the connecting member Q and the slider member M is performed. The sandwiched state of the part H2 is released. Moreover, the 1st uneven | corrugated | grooved part M5 and the 2nd uneven | corrugated | grooved part P1 take the state mutually engaged (refer the figure (a-2)).

  On the other hand, the movement of the second meshing portion N from the mesh release position to the meshable position is performed with the stop of the operation force, that is, the operation of releasing the hand from the elevating lever L1 (or weakening the operation force). When the hand is released from the lifting lever L1, the interlocking member P, the rod R and the lifting lever L1 are lowered to the original position (position before the operation force is applied) by the elastic return force of the spring S, and the interlocking member P is moved downward. Accordingly, the slider member M moves along the width direction in a direction away from the interlocking member P while sliding the first inclined portion M52 of the first uneven portion M5 and the second inclined portion P12 of the second uneven portion P1. As a result of a series of downward movements of the interlocking member P, the sliding state between the first inclined portion M52 of the first uneven portion M5 and the second inclined portion P12 of the second uneven portion P1 is released over time, and subsequently The second convex portion P11 of the second concave and convex portion P1 and the first convex portion M51 of the first concave and convex portion M5 are in a state in which the flat projecting end portions are in surface contact with each other and interlocked with each other. The other side edge of the member P (the side edge on the side where the second uneven part P1 is not provided) ) Abuts the inner surface of the elevating member main body J (the inner surface of the side plate portion J2), and the retraction (retraction) movement of the second meshing portion N from the meshable position to the meshing release position is prohibited (see FIG. (Refer to (b-2)). At this time, the connecting member Q guides the guide protrusion P41 of the interlocking member P along the upper connecting piece and the second inclined piece of the guide groove Q21, thereby reliably moving the slider member M. Can do. As a result, the second meshing portion N held by the slider member M moves in a direction away from the interlocking member P, in other words, in a direction approaching the first meshing portion H2, and can mesh with the first meshing portion H2. Positioned at a possible position. As described above, in the present embodiment, the first projecting portion M51 and the second projecting portion P11 are used to bring the first projecting portion M51 and the second projecting portion P11 into contact with each other, thereby causing the second engaging portion. The “stopper means” is configured to prohibit the retreating movement from the N engageable position to the disengaged position. Further, the interlocking member P can be moved up and down by the combination of the guide groove Q21 and the guide protrusion P41 and the combination of the first inclined portion M52 and the second inclined portion P12, and the second engaging portion N can be engaged. It constitutes the “motion converting means” of the present invention that converts the movement from the position to the mesh release position or the movement from the mesh release position to the meshable position.

  The usage method of the wagon A with a lifting / lowering top plate provided with the lifting / lowering apparatus D demonstrated above is demonstrated.

  First, when an operation force is applied to push up the lifting lever L1 with the middle finger and the ring finger while putting the index finger and little finger on each stationary lever L2, the meshing state of the first meshing portion H2 and the second meshing, and the connecting member Q and the slider member M The state where the first meshing portion H2 is pinched is released, and the unlocking state allowing the elevating movement of the elevating member F is released, and the elevating top plate C is raised to an arbitrary height position while the operation force is continuously applied. In accordance with the operation of moving or moving downward, the lifting member F moves up or down while sliding with respect to the stationary member E. And if the said operating force with respect to the raising / lowering lever L1 is stopped in the state which positioned the raising / lowering top plate C in arbitrary height positions, the 1st meshing part H2 and the 2nd meshing part N will mesh, and the raising / lowering movement of the raising / lowering member F will be carried out. Is locked, and the height position of the elevating table C is fixed. The pair of elevating members F are respectively synchronized racks while synchronously rotating the synchronizing pinion V provided in the elevating devices D so that the height position cannot be changed by the synchronizing shaft inserted into the shaft insertion portion V2. It is set so that it can be moved up and down synchronously by engaging with the engaging claws of U. Moreover, in this embodiment, since the 1st meshing part H2 and the 2nd meshing part N are each providing the 1st tooth part H21 or the 2nd tooth part N2 at 2 mm space | interval, respectively, the height position of the raising / lowering top plate C is set. Fine adjustment can be made in units of 2 mm, and the lift table C can be set at a height substantially flush with the top plate of a desk (not shown) used in combination with the wagon A with the lift table. .

  As described above, the lifting device D according to the present embodiment includes the meshing mechanism G that can be in the locked state that restricts the lifting and lowering movement of the lifting member F or the unlocked state that allows the lifting and lowering member F to move up and down. A first meshing portion H2 having a plurality of first teeth H21 provided at predetermined intervals along the height direction, and a plurality of second teeth provided on the elevating member F at predetermined intervals along the height direction. Since the second meshing portion N having the portion N2 is configured so that the plurality of first tooth portions H21 and the plurality of second tooth portions N2 are meshed with each other in the locked state, Thus, as compared with a mode in which the first tooth portion and the second tooth portion mesh in a one-to-one relationship, not only a stable meshing state can be realized, but also the load resistance is improved, and the first tooth portion H21. And the pitch of each of the second tooth portions N2 can be set small. Ri, as a result, it becomes possible to adjust the height position of the elevator top board C in a few millimeters, can flexibly correspond to various usage mode of the user, and is excellent in practicality.

  In particular, when the second meshing portion N is positioned at the meshable position, the first meshing portion H2 and the second meshing portion N are sandwiched between the slider member M and the connecting member Q, thereby Since the relative displacement restricting means for restricting relative displacement of the second meshing portion N in the thickness direction is provided, the first meshing portion H2 and the second meshing portion N are thin plate-like ones. The meshing portion H2 and the second meshing portion N can be reliably meshed with each other, and the meshing state that can be caused by relative displacement (surface displacement) between the first meshing portion H2 and the second meshing portion N in the thickness direction is deteriorated. It is possible to prevent and secure a better meshing state.

  Moreover, since the relative displacement regulating means is configured to release the sandwiched state of the first meshing portion H2 when the second meshing portion N is positioned at the meshing release position, the first tooth in the unlocked state Since the portion H <b> 2 does not interfere with the slider member M and the interlocking member P, it is possible to realize a smooth up / down movement of the up / down member F relative to the stationary member E.

  In addition, the interlocking member P is provided with a guide groove Q21, and the connecting member Q is provided with a guide protrusion P41 that can slide along the guide groove Q21. The operation of converting the ascending / descending movement of the interlocking member P to the forward / backward movement between the meshable position and the mesh release position of the second meshing portion N via the connecting member Q by sliding the P41 along the guide groove Q21. Since the conversion means is provided, the movement of the second meshing portion N can be stabilized.

  In addition, since a plurality of guide grooves Q21 and guide protrusions P41 are provided so as to correspond to each other, the operation of the interlocking member P can be efficiently converted into the operation of the second meshing portion N.

  Furthermore, in this embodiment, while providing the 1st inclination part M52 in the slider member M as a guide part, the 2nd inclination part P12 corresponding to the 1st inclination part M52 is provided in the interlocking member P, and the raising / lowering movement of the interlocking member P is carried out. Further, a mode is adopted in which the first inclining portion M52 and the second inclining portion P12 are slid relative to each other to cause the second meshing portion N to move forward and backward between the meshable position and the meshing release position. Therefore, in conjunction with the guide action of the guide groove Q21 and the guide protrusion P41, the movement of the second meshing part N is performed using the sliding action of the first inclined part M52 and the second inclined part P12. Can be performed more smoothly and accurately. In particular, since a plurality of first inclined portions M52 and second inclined portions P12 are provided so as to correspond to each other, the operation of the interlocking member P can be efficiently converted into the operation of the second meshing portion N.

  Since it is a motion conversion means using such a guide action and a sliding action, it is possible to reduce an impact sound that can be generated when the movement is stopped, as compared with an aspect using an urging force such as a spring.

  Moreover, since the slider member M and the interlocking member P are formed from a synthetic resin material, it is possible to further suppress impact noise and friction noise when the members M and P are moved.

  Particularly, the direction in which the teeth H21 and N2 of the first meshing part H2 and the second meshing part N are slightly inclined with respect to a virtual straight line perpendicular to the height direction of the stationary member E or the lifting member F is slightly inclined. Therefore, mutual engagement and disengagement can be performed smoothly.

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

  For example, when the relative displacement regulating means is not only when the meshing mechanism is in the locked state, but also when it is in the unlocked state (that is, when the second meshing portion is positioned at the meshing release position), The second meshing portion may be restricted from relative displacement in the thickness direction. Specifically, even when the second engagement portion is positioned at the engagement release position, the first engagement portion is set so as to be slidably movable between the slider member and the connecting member (clamping member). Good.

  Further, the relative regulating means sandwiches the second meshing portion between the inner surface portion of the elevating member (the flat plate portion of the elevating member main body) and the connecting member (clamping member), whereby the first meshing portion and the second meshing portion. May be configured to restrict relative displacement in the thickness direction. In this case, the slider member becomes unnecessary, and the number of parts can be reduced. In addition, you may provide the 1st inclination part and 1st convex part which were provided in the one side edge part of the slider member in the said embodiment in the one side edge part of a 2nd meshing part.

  Moreover, you may apply the member for exclusive use different from a connection member as a clamping member which comprises a relative displacement control means.

  The mode in which the rod itself in the above embodiment functions as the interlocking member of the present invention, and the second inclined portion and the second convex portion are provided at a predetermined portion of the rod may be used. In this case, the interlocking member P shown in the embodiment is not necessary, and the number of parts can be reduced.

  In the above-described embodiment, when the upward movement of the interlocking member P is converted into the movement of the second meshing portion N from the meshable position to the meshing release position, the guide action between the guide groove Q21 and the guide projection P41 is performed. When the downward movement of the interlocking member P is converted into the movement from the meshing release position of the second meshing part N to the meshable position, the first inclined part M52 and the second inclined part P12 Although the aspect which utilized the sliding action positively was shown, the upward movement of the interlocking member P is changed from the meshing possible position of the 2nd meshing part N by changing suitably the shape of a guide groove and the inclination angle of each inclination part. When converting to the movement to the mesh release position, the sliding action of the first inclined part M52 and the second inclined part P12 is positively used, and the downward movement of the interlocking member P is engaged with the second mesh part N. Convert to movement from the release position to the meshable position If the, it may also be actively utilized guiding action of the guide groove Q21 and the guide protrusion P41. Furthermore, the motion converting means is configured by only one of the combination of the guide groove and the guide protrusion or the combination of the first inclined portion and the second inclined portion, and the engageable position of the second engaging element. The movement from the engagement release position to the engagement release position and the movement from the engagement release position to the engageable position may be realized by any one of the combinations described above. Note that the guide groove and the guide protrusion may be single, and similarly, the first inclined portion and the second inclined portion may be single.

  Furthermore, when adopting a mode in which the second meshing portion is held by the slider member, a fixing means for fixing the second meshing portion to the slider member so as not to rotate in the surface direction may be provided. Specifically, FIG. 11 (FIG. 11 (a) is an overall perspective view of a slider member M according to a modification, and FIG. 11 (b) is a view corresponding to FIG. 9 (a-2). As shown in the figure, a concave portion M24 is formed in the first thick portion M2 of the slider member M so as to be recessed from other portions, and the concave portion M24 has a planar shape slightly smaller than the concave portion M24. The overlapping portion N1 of the second meshing portion N is inserted, and the edge portion of the second meshing portion N is brought into contact with the stepped portion M24a that defines the recessed portion M24, whereby the second meshing portion N is attached to the slider member M. On the other hand, the thing fixed so that rotation was impossible in the surface direction is mentioned. The recessed portion M24 is provided with a pair of female screw protrusions M23 having an internal thread portion formed on the inner periphery, a circular hole formed in the second meshing portion N of the female screw protrusion portion M23, and a circular hole of a connecting member (not shown). The second meshing portion N can be held between the slider member M and the connecting member by being inserted into the screw and screwed using a screw. In addition, by forming the concave portion M24 and the overlapping portion N1 of the second meshing portion N in a vertically asymmetrical shape, the second meshing portion with respect to the slider member M so that the protruding direction of the second tooth portion N2 is inclined downward. Positioning means for positioning the mounting direction of N is configured.

  In addition, the distance between the adjacent first tooth portions and the distance between the adjacent second tooth portions are exemplified as approximately 2 mm, but not limited to this, it may be set to an arbitrary numerical value. Needless to say.

  Moreover, you may apply the raising / lowering apparatus mentioned above to the chair provided with the chair main body which provides a stationary member, and the armrest which is supported by the raising / lowering member and can adjust the height position with respect to a chair main body.

  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.

BRIEF DESCRIPTION OF THE DRAWINGS The whole schematic which abbreviate | omits and shows the wagon with a raising / lowering top plate which concerns on one Embodiment of this invention. The figure which simplifies and shows a part of plane of the housing | casing in the embodiment. The whole figure which abbreviate | omits and shows the raising / lowering apparatus which concerns on the same embodiment. The whole perspective view of the raising / lowering apparatus. Xx sectional view taken on the line in FIG.3 (c). The whole perspective view of the stationary member main body in the embodiment. The whole elevation member main part perspective view in the embodiment. The principal part enlarged view of the raising / lowering apparatus which concerns on the same embodiment. Action explanatory drawing. The figure which shows the modification of the movement control part in the embodiment. The figure which shows the modification of the slider member in the embodiment.

Explanation of symbols

A ... Wagon B with lifting table ... Casing C ... Lifting table D ... Lifting device E ... Stationary member F ... Lifting member G ... Meshing mechanism H2 ... First meshing part H21 ... First tooth part M ... Slider member M5 ... First 1 uneven | corrugated | grooved part M51 ... 1st convex part M52 ... 1st inclination part N ... 2nd meshing part N2 ... 2nd tooth part P ... Interlocking member P1 ... 2nd uneven part P11 ... 2nd convex part P12 ... 2nd inclination part P41 ... Guide protrusion Q ... Connecting member Q21 ... Guide groove

Claims (9)

A lifting device that can lift and lower furniture components such as a lifting table with respect to a furniture body such as a housing,
A stationary member provided in the furniture body, a lifting member that moves up and down relative to the stationary member and supports the furniture component, and a lifting member that is provided between the stationary member and the lifting member. An engagement mechanism capable of taking a locked state that restricts movement or an unlocked state that allows the lifting member to move up and down;
The meshing mechanism includes a first meshing portion having a plurality of first teeth provided at predetermined intervals along the height direction of the stationary member, and a predetermined interval along the height direction of the lifting member. A second meshing portion having a plurality of second tooth portions, and meshing the plurality of first tooth portions and the plurality of second tooth portions with each other in the locked state ,
A relative displacement restricting means for restricting relative displacement of the first meshing portion and the second meshing portion in the thickness direction when at least the meshing mechanism is in the locked state;
Further, the second meshing portion can move forward and backward between a meshable position where the second meshing portion can mesh with the first meshing portion and a mesh release position where the meshing state with the first meshing portion can be released. The relative displacement regulating means uses a clamping member that can clamp at least the second meshing portion with the inner surface of the elevating member, and the second meshing portion is positioned at the meshable position. The first meshing part and the second meshing part are relatively displaced in the thickness direction by sandwiching the first meshing part and the second meshing part between the inner surface part of the elevating member and the clamping member. Lifting device characterized by restricting . The second meshing portion is attached to a slider member that is slidably provided on the elevating member, and the meshing position between the meshable position that can mesh with the first meshing portion and the first meshing portion can be released. The relative displacement regulating means uses a clamping member that can clamp at least the second meshing part with the slider member. When the second meshing portion is positioned at the meshable position, the first meshing portion and the second meshing portion are sandwiched between the slider member and the sandwiching member by sandwiching the first meshing portion and the second meshing portion. The elevating device according to claim 1 , which restricts relative displacement of the meshing portion in the thickness direction . The relative displacement regulating means, wherein when the second engagement portion is positioned in the engagement release position, of claim 1 or 2, wherein the first is obtained by adapted to release the nipping state of meshing portion lift device. The second meshing portion is attached to a slider member that is slidably provided on the elevating member, and the meshing position between the meshable position that can mesh with the first meshing portion and the first meshing portion can be released. It is possible to slide together with the slider member between the mesh release position, and the operation of the interlocking member that moves up and down relative to the second meshing portion and the slider member in conjunction with the application or stop of a predetermined operation force. the second claim is provided with the motion conversion means for converting the forward and backward movement of the interlockable position to the meshable position from the movement or the disengagement position to the engagement release position of the engagement portion 1, 2 or 3 The lifting device described. The motion conversion means uses the interlocking member and a connecting member that connects the interlocking member and the slider member, and a guide groove is provided in one of the interlocking member or the connecting member, and the other A guide projection that is movable along the guide groove, and guides the guide projection to the guide groove based on the up-and-down movement of the interlocking member. The lifting device according to claim 4 , wherein the two meshing portions are moved from the meshable position to the meshing release position or from the meshing release position to the meshable position . The motion conversion means uses the slider member and the interlocking member, and provides a first inclined portion inclined at a predetermined angle along the height direction on one side edge portion of the slider member, A second inclined portion corresponding to the first inclined portion is provided along a height direction of one side edge portion of the interlocking member that can face one side edge portion of the slider, and the interlocking member The first inclining portion and the second inclining portion are slid relative to each other on the basis of the up-and-down movement, thereby moving the second engagement portion from the engagement possible position to the engagement release position or from the engagement release position to the engagement possible position. The lifting device according to claim 4 or 5 , wherein the lifting device is moved . The elevating device according to claim 4, 5 or 6, wherein the slider member and the interlocking member are made of a synthetic resin material. The protruding direction of each tooth portion of the first engagement portion and the second engagement portion is set to a direction slightly inclined with respect to a virtual straight line perpendicular to the height direction of the stationary member or the elevating member. Claims 1, 2, 3, 4, 5, 6 or 7 The casing that is the furniture main body, the elevator top plate that is the furniture constituent member that is attached to the casing and whose height position can be adjusted, and the elevator top plate that can be moved up and down relative to the casing. 8. A wagon with a lifting table, comprising the lifting device according to any one of claims 8 to 10.

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