JP4948870B2 - table - Google Patents

Description

  The present invention relates to a table in which a top plate and legs can be assembled, and a lower end of the legs includes a caster with a lock device.

In this type of conventional table, casters are provided at the lower ends of a pair of left and right legs with a top supported on the top, and each caster has a link mechanism by operating means provided on the top or the legs. There are some which can be switched between a locked state and an unlocked state (see, for example, Patent Documents 1 to 3).
Japanese Patent Laid-Open No. 05-068619 JP 2003-259918 A JP 2004-086881 A

  However, in the above-mentioned conventional one, since the linkage means for linking the lock means and the operation means of the caster is based on a series of link mechanisms, the mounting accuracy of each mechanism must be increased, and the assembly is troublesome. Not only does the operation cost increase, but it is necessary to ship and transport the top plate and the legs in an assembled state in the factory, which causes a problem of poor loading efficiency.

  In view of the above-mentioned problems of the prior art, the present invention can be transported in a state where the top plate and the legs are separated, and can be easily assembled on site, thereby reducing the work cost. It is an object of the present invention to provide a table that can improve the loading efficiency.

According to the present invention, the above problem is solved as follows.
(1) Casters with a lock device are provided at the lower ends of a pair of left and right legs that support the top plate so that the top plate can be assembled, and the operation means provided on the top plate and the lock device are linked by linkage means. In the table in which the locking device can be switched between the locked state and the unlocked state by the operation of the operation means, the linkage means extends from the operation means downward along the leg. And a second linkage means extending upward along the leg from each locking device, and the free ends of the first and second linkage means are separated at a position along the leg. Connect as possible.

(2) In the above item (1), the first and second linking means are disposed in the legs.

(3) In the above (1) or (2) section is provided with the left and right caster with locking device on the lower end front and rear portions of each leg, the middle portion in the longitudinal direction of the lower surface of the horizontal Ashi杆 leg, the second linkage A pivot link linked to the means is pivotally mounted, and the pivot link and the front and rear lock devices are connected to each other by a third linkage means so that the front and rear lock devices are synchronized with each other by the rotation of the pivot link. The linkage is made so as to be switched between a locked state and an unlocked state.

(4) In any of the above (1) to (3) sections, the first and second linkage means, the Bowden cable consisting of wires and the guide tube, the extended end portion from the wire guide tube, Arranged in the legs and connected to each other.

(5) In the above item (4), the leg includes an inwardly U-shaped exterior portion having an inner side surface opened and a plurality of substantially horizontal plurality provided in the exterior portion so as to be separated from each other in the vertical direction. A holding groove for fitting and holding the guide tube is provided on the inner edge of any of the ribs.

(6) In any one of the above items (1) to (5), the inner side surface of the leg facing left and right is opened in the vertical direction so that the first and second linking means can be taken in and out of the leg from this opening. The opening is closed by a detachable leg cover.

(7) In any one of the above items (1) to (6), the top plate is pivotally attached to the upper part of the leg so that it can be rotated between the use position leveled above the leg and the folding position facing upward. It is possible to move.

(8) In any one of the above items (1) to (7), each locking device can lock both the rotation of the wheel provided on each caster around the horizontal axis and the turning around the vertical axis. And

According to the present invention, the following effects can be achieved.
According to the first aspect of the present invention, the operation means and the first linkage means are attached to the top plate, and the top plate and the legs are separated while the caster with a lock device and the second linkage means are attached to the legs. And can be easily assembled simply by connecting the first linkage means and the second linkage means after the top plate is attached to the legs.

  According to invention of Claim 2, since the 1st and 2nd linkage means is arrange | positioned in the leg, they are not exposed to the exterior, and the appearance is good.

  According to the third aspect of the present invention, the pair of front and rear locking devices can be linked to the second linkage means so as to operate in synchronization with each other with a simple structure.

  According to the fourth aspect of the present invention, the first and second linking means are arranged such that the Bowden cable and the extending end portion of the wire from the cover tube are arranged in the leg and connected to each other. Assembling work can be easily performed.

  According to the fifth aspect of the present invention, the first and second linking means can be easily put in and out of the leg, and the leg structure can be simplified, reduced in weight and improved in strength.

According to the sixth aspect of the present invention, the inner side surfaces of the legs facing left and right are opened in the vertical direction so that the first and second linking means can be put in and out of the legs from the openings, and the openings are opened. Is closed by a detachable leg cover, so that the wire can be easily connected.
Further, the wire and the connecting portion of the wire can be concealed by the leg cover, and the appearance can be improved.

  According to the seventh aspect of the present invention, since the top plate is pivotally attached to the upper part of the leg, it can be rotated between the use position that is horizontal above the leg and the folding position that faces upward. The table can be stored in a narrow storage space in a folded state. In other words, the present invention can also be applied to such a folding table.

  According to the invention described in claim 8, in each lock device, the rotation of the wheel can be locked simultaneously with the rotation of the wheel, and the table can be prevented from moving reliably.

Embodiments of the present invention will be described with reference to the accompanying drawings.
1 to 12 show an embodiment of the present invention.
As shown in FIGS. 1 to 4, this table is substantially L in a side view in which a pedestal (2) is erected from the rear part (sometimes an intermediate part) of a horizontal leg rod (1) facing in the front-rear direction. The middle part of the top board (4) is pivotally attached to the upper part of the pair of left and right legs (3) and (3) with the horizontal axis (5) facing the left and right direction. As shown by a solid line in FIG. 1, it is possible to rotate between a use position that is substantially horizontal and a folding position that faces in the vertical direction parallel to the pedestal (2) as shown by an imaginary line in FIG. Yes.

  The top plate (4) and the rear plate (6) provided below the rear part of the top plate (6) are used as shown by the solid line in FIG. 1, and as shown by the imaginary line in FIG. Since the rotation mechanism (7) for enabling rotation to the folding position positioned immediately below 4) is not directly related to the present invention, detailed description thereof is omitted.

  Casters (8) and (8) and lock devices (9) and (9) for the respective casters are provided on the front and rear portions of the horizontal leg rod (1) of each leg (3). Therefore, with four casters (8) provided at the lower ends of the legs (3) and (3), the legs (3) and (3), and the top plate (4) supported by the legs (3) and (3), Is supported.

On the front lower surface of the top plate (4) (one side or the center in the left-right direction), one operating lever (10) has a shaft (11) pointing in the up-down direction, which will be described later, and is in the locked position ( L) and an unlocked position (U) are pivotally mounted so as to be rotatable.

  This operating lever (10) has the above-mentioned four locking devices (9) and linkage means (12), and is fully locked in conjunction with the rotation of the operating lever (10) from the locked position to the unlocked position. The device (9) is unlocked and linked to each other so that all the locking devices (9) are locked in conjunction with the rotation of the operating lever (10) from the unlocked position to the locked position.

  As shown in FIGS. 1 and 2, the linking means (12) is a first extending downward from the operation lever (10) along the pillars (2) of the left and right legs (3). Linking means (12A) and a second linkage extending from each locking device (9) through the horizontal leg rod (1) of the left and right legs (3) and extending upward along the pillar (2) A connecting means (12C) for detachably connecting the free end portions of the means (12B) and the first and second linking means (12A) (12B) at a position along the pedestal (2) is provided. .

Next, the details of the first and second linking means (12A) (12B) will be described.
As shown in FIGS. 6 and 7, in the first linkage means (12A), a first wire (13) whose base end is connected to the operating lever (10) and the first wire (13) are inserted. And a flexible first guide tube (14) guided as a Bowden cable.

  The operation lever (10) is formed integrally with the winding drum (16) pivotally supported by the shaft (11) in the casing (15) fixed to the lower surface of the top plate (4), and is formed at the front end. The operation portion (10a) protrudes forward through a window hole (17) formed in the front surface of the casing (15).

  At the base ends of the first guide tubes (14) and (14) extending from the left and right legs (3), the first wires (13) and (13) drawn from there overlap the winding drum (16). It is fixed to the casing (15) so as to face the tangential direction of the outer peripheral surface of the take-up drum (16) so that it can be smoothly wound without any trouble.

  The first wire (13) pulled out from the proximal end of the first guide tube (14) is wound around a part of the outer peripheral surface of the winding drum (16) and is provided at the proximal end of the first wire (13). The spherical wire end (18) is fitted and locked in a fitting hole (19) provided on the outer peripheral surface of the winding drum (16).

  In the housing hole (20) provided in the portion of the casing (15) close to the winding drum (16), an elastic body (21) such as rubber is pressed against the outer peripheral surface of the winding drum (16). A cylindrical pressing body (22) facing in the vertical direction is accommodated.

  On the outer peripheral surface of the winding drum (16), when the operation lever (10) is set to the locked position (L) and the unlocked position (U), the vertical direction in which the pressing body (22) is fitted is arranged. A shallow bowl-shaped concave groove (23) and (24) facing each other is provided so that the operating lever (10) can be held elastically in the locked position (L) and the unlocked position (U).

  When the operating portion (10a) of the operating lever (10) is rotated from the locked position (L) indicated by the solid line in FIG. 6 to the unlocked position (U) also indicated by the imaginary line, the first wire (13) ( 13) is wound around the outer peripheral surface of the winding drum (16) and pulled out from the proximal ends of the first guide tubes (14) (14).

  As shown in FIGS. 3 and 4, the distal end portion of the first wire (13) passes through the horizontal axis (5) from the operation lever (10), together with the first guide tube (14), as shown in FIGS. 3 and 4. ) Is extended downward along the pedestal (2) of the left and right legs (3).

  As shown in FIGS. 8 to 10, the second link means (12B) is inserted with the second wire (25) whose base end is connected to each locking device (9) and the second wire (25). And a flexible second guide tube (26) guided as a Bowden cable.

  At the middle part in the front-rear direction on the lower surface of the horizontal leg rod (1) of the left and right legs (3), the middle part of the rotary link (27) linked to the second linkage means (12B) faces the vertical direction. It is pivotally attached with an axis (28).

  An operating rod (29) in one end of the rotating link (27) and the front locking device (9), and an operating rod (29) in the other end of the rotating link (27) and the locking device (9) in the rear Are linked to each other by third linkage means (12D) comprising connecting rods (30) and (30) facing in the front-rear direction, and the third linkage means (12D) is used to rotate the rotating link (27). By the movement, the front and rear locking devices (9) and (9) are switched to a locked state and an unlocked state in synchronization with each other.

  The connection between each connecting rod (30) and each end portion of the rotation link (27) is a flat L-shaped connecting bracket fixed to the end portion of each connecting rod (30) that is close to the shaft (28). By connecting the free end portion of (31) to each end portion of the rotation link (27) with the shaft (32) pointing in the up-and-down direction, the two connection fittings (31) are centered around the shaft (28). It is preferable to have a saddle-like arrangement.

  The extension part (31a) protruding rearward from the shaft (32) of the connection fitting (31) fixed to the rear end of the front connection rod (30) is connected to the second wire (25 of the second linkage means (12B)). ) Is fastened at one end. The free end portion at the other end of the second wire (25) is a second guide tube having one end fixed to a holding piece (33) provided on the lower surface of the horizontal leg rod (1) behind the shaft (28). (26) is inserted into the second guide tube (26) together with the horizontal leg rod (1) in the leg (3) toward the rear, as shown in FIG. 3 and FIG. 2) It is extended so as to rise upward.

  Next, details of each caster (8) and its locking device (9) will be described. In the following description, only the front caster (8) and its locking device (9) will be described, and the rear caster (8) and its locking device (9) will be described with reference to the front caster (8). Since it has the same structure as that of the locking device (9), the description is omitted.

  As shown in FIGS. 11 and 12, each caster (8) is provided with a revolving member (35) pivotally supported by a lower end of a horizontal leg rod (1) with a revolving shaft (34) facing upward and downward. A pair of wheels (37) and (37) pivotally supported by a horizontal shaft (36) are provided on both side surfaces of the turning member (35).

  On the upper surface of the swivel member (35), an internal gear-shaped first engaged portion (38) centering on the swivel shaft (34) is provided, and both wheels (37) and (37) are opposed to each other. The surface is provided with an internal gear-shaped second engaged portion (39) centering on the horizontal axis (36).

  As shown in FIGS. 11 to 15, the locking device (9) includes a casing (40) attached to the lower end of the horizontal leg rod (1). The casing (40) includes a rectangular tube-shaped vertical guide portion (40b) whose upper end is closed by an upper end wall (40a), and one side surface of the vertical guide portion (40b) (the front caster (shown in FIG. 5)). 8) a locking device (9) for use, and a horizontal guide portion (40c) in the form of a rectangular tube connected to the rear surface).

  In the horizontal guide portion (40c) of the casing (40), a prismatic actuating rod (29) whose base end is fixed to the connecting rod (30) described above has a front locking position and a rear unlocking position. And are slidable in the front-rear direction.

On both side surfaces of the front end portion of the operating rod (29), there are protrusions (42) (42) that are substantially triangular in side view and that form an inclined surface (41) whose front surface is inclined upward and downward and whose upper surface is inclined forward and upward. Is provided.
Further, on both sides of the operating rod (29), when the operating rod (29) reaches the locked position, it abuts against the opening end of the horizontal guide portion (40c) so that it does not move further forward. A stopper (29a) is provided.

  A prismatic main body (44) of the first elevating body (43) is fitted to the vertical guide portion (40b) of the casing (40) so as to be slidable in the vertical direction.

  A through hole (45) is provided in the middle part of the main body (44) so as to allow the operating rod (29) to pass therethrough, and the upper part of both inner side surfaces of the through hole (45) is provided. An inclined surface that is slidably mounted on the left and right inclined surfaces (41) and (41) of the operating rod (29) and is inclined forward and upward at the same inclination angle as the inclined surfaces (41) and (41). Inward projections (47) and (47) having (46) and (46) at the lower end are provided.

  At the lower end of the main body (44), there is a ring-shaped presser part (48) centering on the pivot shaft (34), and an internal gear-like first engaged part (38) just below the main body (44). A first engaging portion (49) made of one or a plurality of teeth so as to be able to mesh with a part of is integrally provided so as to have the same height.

  Between the upper end wall (40a) of the vertical guide part (40b) in the casing (40) and the upper end surface of the main body (44) in the first elevating body (43), a compression coil spring as a first biasing means (50) is shrunk.

  When the first elevating body (43) is constantly urged downward by the compression coil spring (50) and the operating rod (29) is located at the locked position, as shown by a solid line in FIG. The first engaging portion (49) meshes with the first engaged portion (38) on the upper surface of the turning member (35), and the ring-shaped presser portion (48) is the first engaged portion (38). It is positioned at a lock position that is in contact with or close to the upper surface of the other swiveling member (35).

  From this state, when the operating rod (29) is pulled backward by the connecting rod (30) and moved to the unlocked position, the inclined surface (41) of the operating rod (29) and the first lifting body (43) ) And the inclined cam mechanism (51) comprising the inclined surface (46), the first elevating body (43) is pushed up against the urging force of the compression coil spring (50) together with the inclined surface (46). Thus, as indicated by an imaginary line in FIG. 11, the first engaging portion (49) is in the unlocked position away from the first engaged portion (38).

  A bottomed hole (52) is provided at a position immediately below the presser part (48) on the upper surface of the swivel member (35), and a second lifting body (53) is provided in the bottomed hole (52). An elevating shaft (54) facing in the up-down direction is fitted to be slidable in the up-down direction.

  A horizontal hole (55) orthogonal to the intermediate part of the bottomed hole (52) is provided in the intermediate part of the swivel member (35), and the lower end of the lifting shaft (54) is provided in the horizontal hole (55). The bifurcated member (56), which is bifurcated in a downward U-shape as a whole and divides in a bifurcated manner from the center and protrudes on both sides of the swivel member (35), fits slidably in the vertical direction. Has been. A second engagement that engages with and disengages from the inner gear-shaped second engaged portions (39) and (39) provided on the inner surfaces of both wheels (37) and (37) is provided at both lower ends of the bifurcated member (56). Portions (57) and (57) are provided.

  Between the bottom surface of the bottomed hole (52) and the center of the bottom surface of the bifurcated member (56), a compression coil spring (second biasing means) having a biasing force weaker than the biasing force of the compression coil spring (50) ( 58) has been reduced.

  The second lifting / lowering body (53) is always urged upward by the compression coil spring (56), and the first lifting / lowering body (43) is located at the unlocked position as indicated by an imaginary line in FIG. The upper end of the elevating shaft (54) protrudes upward from the upper surface of the turning member (35), and both the second engaging portions (57) (57) are connected to both wheels (37) (37). It is located in the unlocking position away from the second engaged portion (39) (39).

  From this state, when the first elevating body (43) is lowered to the locked position, the upper end of the elevating shaft (54) is pushed down by the pressing portion (48) of the first elevating body (43), and the second elevating body (53) is a locked position where the second engaging portions (57) and (57) are engaged with the second engaged portions (39) and (39) of both wheels (37) and (37).

Next, the connection structure between the first linkage means (12A) and the second linkage means (12B) in the pedestal (2) will be described in detail.
As shown in FIGS. 3 to 5, the pedestal (2) rising from the horizontal leg (1) has an inwardly U-shaped exterior part (59) whose inner side surface is open (59 a), and this A plurality of substantially horizontal ribs (60) provided so as to be spaced apart from each other in the vertical direction in the exterior portion (59), a holding groove ( 61) is formed, and the opening (59a) can be closed by a detachable leg cover (62).

  In order to connect the pedestal (2) and the top plate (4), as shown in FIG. 4, the cylindrical shape of the horizontal shaft (5) that is rotatably mounted on the lower surface of the top plate (4) in advance. The upper part of the connecting plate (63) is fitted and fixed to the end of the base plate, and the upper part of the pedestal (2) is placed on the end of the horizontal shaft (5) with the connecting plate (63) in between. The upper part of the pedestal (2) and the horizontal axis (5) are fastened with the bolt (64) that is fitted and inserted from the outside of the pedestal (2) toward the end of the horizontal axis (5). The lower part of the connecting plate (63) is fixed to the upper inner surface of the pedestal (2) with fixing screws (65) (65).

  The first guide tube (14) extending outward from the end of the horizontal shaft (5) through the connecting plate (63) is placed in the holding groove (61) at the top of the pedestal (2). Mating. At the tip of the first guide tube (14) and the tip of the second guide tube (26) extended so as to rise upward in the pedestal (2) from the horizontal leg rod (1) of the leg (3) The protective cylinders (66) and (67) are fixed to each other, and the first and second guide tubes (14) and (26), together with the protective cylinders (66) and (67), hold grooves ( 61).

At the tips of the first and second wires 13 and 25 drawn out from the first and second guide tubes 14 and 26, ring-shaped connecting fittings 68 and 69 are respectively provided. It is fastened. As shown in FIG. 5, these connection fittings (68) and (69) are connected by a known push rivet (70) that can be secured with one touch.
Thus, the first and second linking means (12A) and (12B) are connected to each other and accommodated in the pedestal (2) through the opening (59a).

The opening (59a) after the first linkage means (12A) and the second linkage means (12B) are connected and accommodated in the pedestal (2) is closed by the leg cover (62).
Therefore, since the first and second linking means (12A) and (12B) can be taken in and out of the pedestal (2) from the opening (59a), the connecting operation can be easily performed.

As mentioned above, although preferable embodiment of this invention was described, this invention can also be implemented in the following deformation | transformation aspects within the range which does not deviate from a claim.
(a) The first and second linking means (12A) and (12B) are connected by a bolt and a nut instead of the push rivet (70).
(b) The lock device (9) is provided on only one of the casters (8) and (8) at the front and rear portions of each leg (3), and the second linkage means (12B) is replaced with the third linkage means (12D). It connects directly to the locking device (9) without going through.

It is a side view in the use condition of one embodiment of the present invention. Similarly, it is a rear view. It is a vertical side view of the leg cover removal state in the III-III line of FIG. It is the disassembled perspective view which looked at the top plate and the leg from diagonally below. It is an enlarged side view which shows the connection state of the 1st and 2nd linkage means with a part notch. It is an enlarged plan view of an operation lever and its casing. It is the perspective view which looked at the operation lever and its casing from diagonally upward. It is a vertical side view of the lower end part of a leg. It is a bottom view of a leg when a caster is made into a locked state. It is a bottom view of a leg when a caster is made into an unlocked state. It is an expanded vertical side view of the caster of a front part and the attachment part of the locking device. It is the XII-XII sectional view taken on the line of FIG. It is the perspective view which looked at the locking device of the front part from the slanting back. It is the perspective view which turned the front locking device upside down and was seen from diagonally back. It is a disassembled perspective view of the internal mechanism of a locking device.

Explanation of symbols

(1) Horizontal legs
(2) Pillar
(3) Leg
(4) Top plate
(5) Horizontal axis
(6) Rear plate
(7) Rotating mechanism
(8) Casters
(9) Locking device
(10) Control lever
(10a) Operation unit
(10b) Hanging piece
(11) axis
(12) Linkage means
(12A) First linkage means
(12B) Second linkage means
(12C) Connecting means
(12D) Third linkage means
(6) Rear plate
(7) Rotating mechanism
(8) Casters
(9) Locking device
(10) Control lever
(10a) Operation unit
(10b) Hanging piece
(11) axis
(12) Linkage means
(12A) First linkage means
(12B) Second linkage means
(12C) Connecting means
(12D) Third linkage means
(13) First wire
(14) First guide tube
(15) Casing
(16) Winding drum
(17) Window hole
(18) Wire end
(19) Mating hole
(20) Accommodation hole
(21) Elastic body
(22) Press body
(24) (23) Groove
(25) Second wire
(26) Second guide tube
(27) Rotating link
(28) axis
(29) Working rod
(30) Linkage
(31) Connection bracket
(31a) Extension
(32) axis
(33) Holding piece
(34) Swing axis
(35) Rotating member
(36) Horizontal axis
(37) Wheel
(38) First engaged part
(39) Second engaged portion
(40) Casing
(40a) Top wall
(40b) Vertical guide
(40c) Horizontal guide
(41) Inclined surface (first inclined surface)
(42) Projection
(43) First lifting body
(44) Body
(45) Through hole
(46) Inclined surface (second inclined surface)
(47) Inward projection
(48) Presser foot
(49) 1st engaging part
(50) Compression coil spring (first biasing means)
(51) Inclined cam mechanism
(52) Bottomed hole
(53) Second lifting body
(54) Elevating shaft
(55) Horizontal hole
(56) Forked member
(57) Second engaging portion
(58) Compression coil spring (second biasing means)
(59) Exterior part
(59a) Opening
(60) Rib
(61) Holding groove
(62) Leg cover
(63) Connecting plate
(64) Bolt
(65) Fixing screw
(66) (67) Protection cylinder
(68) (69) Connecting bracket
(70) Push rivet
(L) Lock position
(U) Unlock position

Claims (8)

Casters with locking devices are provided at the lower ends of a pair of left and right legs that support the top plate so that the top plate can be assembled, and the operating means provided on the top plate and the locking device are linked with linkage means, In the table that allows the locking device to be switched between the locked state and the unlocked state by operating the operating means,
The linkage means is formed by first linkage means extending downward along the legs from the operating means, and second linkage means extending upward along the legs from the lock devices. A table characterized in that the free end portions of the first and second linking means are detachably connected at positions along the legs.   2. The table according to claim 1, wherein the first and second linking means are disposed in the legs. A caster with a locking device is provided at the front and rear ends of the left and right legs, and a pivot link linked to the second linkage means is pivotally attached to the middle part in the front-rear direction on the lower surface of the horizontal leg rod. The rotation link and the front and rear locking devices are linked with the third linkage means so that the front and rear locking devices are synchronized with each other and switched between the locked state and the unlocked state by the rotation of the rotation link. The table according to claim 1, wherein the table is a table. Claims the first and second linkage means, the wire and consisting of the guide tube Bowden cable, the extended end portion from the wire guide tube, characterized by being connected to each other disposed in the leg The table in any one of 1-3.   The leg is composed of an inwardly U-shaped exterior part with an open inner surface and a plurality of substantially horizontal ribs provided in the exterior part so as to be separated from each other in the vertical direction. The table according to claim 4, wherein a holding groove for fitting and holding the guide tube is provided in an inner edge portion of the rib.   The inner side surfaces of the legs facing left and right are opened in the vertical direction so that the first and second linking means can be taken in and out of the legs, and the openings are closed by a removable leg cover. The table according to claim 1, wherein:   The top plate is pivotally attached to the upper part of the leg so as to be rotatable between a use position that is horizontal above the leg and a folding position that faces upward. Table described in.   The table according to any one of claims 1 to 7, wherein each locking device can lock both rotation of a wheel provided on a caster around a horizontal axis and turning around a vertical axis. .

Images