JP2014195517A - Brake operation mechanism for movable table - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brake operation mechanism for a movable table capable of being intuitively and surely operated with a very simple configuration.SOLUTION: A table comprises: a brake mechanism configured so as to make a leg unit 1 on which a support post 2 for supporting a top plate 3 is erected perform brake action by using a caster 4 and energy of a spring, and make a control cable 6 release the brake action; and an operation handle 19 which is used for operating the control cable and is supported so as to be capable of rotating in the horizontal direction in a casing 16 provided under an end part of the top plate 3, where a stopper 25 is retractably provided in a rotation locus of the operation handle in the vicinity of a stroke end in a direction of the operation handle's rotation for releasing the brake action by drawing an inner cable of the control cable in order that the stopper 25 inhibits the operation handle from rotating in the direction of the other stroke end.

Description

  The present invention relates to a brake operation mechanism in a movable table such as a bed table.

  There are bedside tables and overbed tables as bed tables used by people on the bed. The former is composed of a leg frame, a support column erected on the end side of the leg frame, and a top plate supported by the support column. The rear end side of the leg frame on which the support column is erected, and the front end side Each is provided with a pair of left and right casters. The leg frame is moved from the side to the space below the bed, and the top plate is placed on the floor of the bed. On the other hand, the latter has a structure with casters with casters corresponding to both ends of the top plate, and it is used by moving it from the foot side of the bed in the longitudinal direction of the bed and positioning the top plate on the bed floor. It is what.

  Since bed tables such as bedside tables and overbed tables used in this way can be used as auxiliary means to support the body or depending on the case, or may unexpectedly put weight on, In such a case, a brake mechanism that makes the movement of the leg frame impossible is essential.

  In the conventional bed table brake mechanism, the brake operation is performed by urging the spring and the release is performed by operating the operation handle. However, when moving the table, the operation handle is always held. It must be very inconvenient.

  As a solution to the inconvenience of such a bed table, there is a bedside table described in Patent Document 1, for example. In the bedside table described in Patent Document 1, among the casters provided on the leg frame, the caster on the front end side of the leg frame moving to the space below the bed is configured to have a smaller diameter than the caster on the rear end side. In addition, all casters are configured as casters with a brake mechanism, and the control cable that operates the brake mechanism of all these casters is operated in conjunction with a common operation handle provided on the top plate. It is said. In order to operate the control cable corresponding to all casters with a common operation handle, a branching device is provided that branches the common inner cable on the operation handle side to the inner cable of the control cable corresponding to each caster. Yes.

  The brake operation mechanism for the bedside table described in Patent Document 1 has an operation unit provided on the table, and the operation unit includes a handle, a release maintaining mechanism, a release button, and the like. This release maintaining mechanism is configured by a slide member that is biased in one direction by a spring and provided with a lock member locking hole and a shock absorber, and a lock member that is engaged with the lock member locking hole by the spring bias. The release button is configured to push the lock member backward from the lock member engagement hole against the biasing force of the spring by being pressed. The handle and the slide member connected to the inner cable of the control cable are provided with a gear portion, and an idle gear is interposed between them. When the handle is rotated, the slide member slides through the idle gear. It is configured.

  In such a configuration, when the brake operating mechanism of Patent Document 1 rotates the handle in the pulling direction and pulls the inner cable of the control cable, the brake operation of the caster is released and the slide member slides. When the lock member engagement hole reaches the corresponding position of the lock member, the lock member engages with the lock member engagement hole by the bias of the spring, and the rotation of the handle is locked to release the brake operation of the caster. Is maintained.

JP 2011-182896 A

  In the brake operation mechanism described in Patent Document 1, the rotation of the handle is transmitted to the slide member via the idle gear and moved, and the movement of the slide member is prevented by the lock member and the release state of the brake operation is maintained. Not only has the disadvantage that there are many components such as gears and springs and the structure is very complicated, and there are many causes of failure, but the state of the lock member can be known directly with the handle. It is difficult to perform intuitive and reliable operations.

  In view of the above-described problems, an object of the present invention is to provide a brake operation mechanism in a movable table capable of intuitive and reliable operation with a very simple structure.

  In order to solve the above-described problems, in the present invention, a caster for movement and a brake mechanism are provided on a leg portion where a column supporting a top plate is erected, and this brake mechanism performs a brake operation by urging a spring. In a table provided with an operation handle for operating the control cable, the operation handle is rotated in a horizontal direction on a casing provided below the end of the top plate. In the vicinity of the stroke end of the rotation direction of the operation handle for releasing the brake operation of the brake mechanism by pulling the inner cable of the control cable in a movable manner, the direction of the other stroke end of the operation handle A stopper is provided to prevent rotation of the operation handle so that it can appear and disappear in the rotation trajectory of the operation handle. Suggest brake operating mechanism in movable table.

  The present invention also proposes a brake operating mechanism in a movable table in which the brake mechanism is configured in all casters provided on the legs.

  According to the present invention, in the above configuration, the brake mechanism supports the brake piece support member rotatably on the leg portion, and the brake piece protrudes and descends below the lower end of the caster by the rotation of the brake piece support member. We propose a brake operating mechanism for a movable table that can be configured.

  The present invention also proposes a brake operating mechanism for a movable table having a fixed handle outside the stroke end of the operating handle.

  In the present invention, in the above-described configuration, the casing is provided with a stopper shaft that can be rotated and corresponds to the stroke direction of the operation handle, and the stopper shaft is provided on the stopper shaft so as to be disposed outside the casing. A brake operating mechanism for a movable table is proposed in which the stopper shaft is rotated by an operating portion so that the stopper can be projected and retracted within the rotation locus of the operating handle. Further, according to the present invention, in this configuration, the stopper is positioned within the rotation locus of the operation handle in a state where the stopper is rotated and raised by the stopper shaft, and is positioned outside the rotation locus of the operation handle when the stopper is rotated and lowered by its own weight. A brake mechanism in a movable table with a configuration is proposed.

  The present invention also proposes a brake operation mechanism in a movable table, which is a member provided with a load between a support column and a top plate to receive a load.

  In the brake operation mechanism of the present invention, the operation handle is rotated from one end side to the other end side of the rotation stroke, and the inner cable of the control cable is pulled to be positioned at or near the stroke end in the rotation direction. And the brake mechanism comprised in the caster itself, or the brake mechanism provided separately from the caster can be operated against the urging force of the spring provided thereon, and the brake operation can be released.

  On the other hand, when the operation handle is returned to the original position and the inner cable is not pulled, the brake mechanism is operated by the biasing of the spring to be in a brake operation state. In this state, since the table is maintained in an immobile state, it can be used as an auxiliary means for supporting the body, and is safe because it does not move even when the body weight is unexpectedly applied.

  As described above, if the operator holds the operation handle at the stroke end in the rotation direction or in the vicinity thereof, if the operator holds it with his hand, the release state of the brake operation can be maintained. Can be moved easily.

  In the present invention, in a state where the operation handle is positioned at or near the stroke end in the rotation direction, the stopper protrudes into the rotation locus of the operation handle, so that the operation handle is stroked in the rotation direction. Can be held in the vicinity of the end, and therefore the brake operation release state of the brake mechanism can be maintained, so that the operator can maintain the brake operation release state with the hand released from the operation handle. This is convenient when moving.

  Thus, the stopper for maintaining the released state of the brake operation has a very simple configuration in which the stopper is provided in the vicinity of the stroke end in the rotation direction of the operation handle so as to be able to appear and retract in the rotation locus of the operation handle. Since the operation handle is directly prevented from rotating, an intuitive and reliable operation is possible.

When the stopper is configured to be positioned within the rotation trajectory of the operation handle in a state where the stopper is rotated up by the stopper shaft, and positioned outside the rotation trajectory of the operation handle in a state where the stopper is rotated down due to its own weight, Since the operation handle that attempts to return to the original position from the stroke end elastically presses the stopper, it is possible to maintain the released state of the brake operation by preventing the lowering of the stopper due to its own weight.

  Further, when returning from the released state of the brake operation, it is only necessary to release the hand from the operation handle after further rotating the operation handle to the stroke end without operating the stopper itself. That is, when the operation handle is further rotated to the stroke end, the stopper is rotated and lowered together with the rotation of the stopper shaft due to its own weight, and is positioned outside the rotation locus of the operation handle. Then, the operation handle can return to the original position without being stopped by the stopper.

  In the present invention, if a fixed handle is provided outside the stroke end of the operation handle in the casing, the operation handle is very easily operated using the fixed handle as a finger hook.

FIG. 1 is an explanatory perspective view of a first embodiment in which the present invention is applied to a bedside table. FIG. 2 is a side view of the first embodiment of the present invention. FIG. 3 is an enlarged view of a main part of FIG. FIG. 4 is a front view of the main part of the situation of FIG. 3 as viewed from the right side in the figure. FIG. 5 is a perspective view of the main part of the aspect of FIG. 3 viewed from the lower right direction in the figure. FIG. 6 is an enlarged view of a main part in another aspect different from FIG. FIG. 7 is a front view of an essential part of the situation in FIG. 6 as viewed from the right direction in the figure. FIG. 8 is a plan view of an essential part of the aspect of FIG. 3 as viewed from above. FIG. 9 is a plan view of an essential part of the aspect of FIG. 6 as viewed from above. FIG. 10 is a plan view of an essential part showing a situation where the stopper is operating. FIG. 11 is a perspective view of an essential part showing the brake mechanism on the front end side of the leg frame in a brake operation release state. FIG. 12 is a perspective view of a main part showing the brake mechanism on the front end side of the leg frame in a brake operation state. FIG. 13 is a side view of the leg frame as seen from the front end side to the rear end side. FIG. 14 is a perspective view of an essential part showing the brake mechanism on the front end side of the leg frame from the bottom side with the top and bottom reversed in the braking operation state. FIG. 15 is a cross-sectional view of the main part showing the AA cross section of FIG. FIG. 16 is a perspective view of the main part of the brake mechanism on the front end side of the leg frame, viewed from the bottom side with the top and bottom reversed in the brake operation released state. FIG. 17 is a cross-sectional view of the main part showing the BB cross section of FIG. FIG. 18 is an explanatory perspective view of a second embodiment in which the present invention is applied to an overbed table.

Next, a first embodiment in which a brake operation mechanism according to the present invention is applied to a bedside table will be described with reference to FIGS.
As shown in the drawing, the bedside table of the first embodiment includes a leg frame 1, a support column 2 standing on the end side of the leg frame 1, and a top plate 3 supported by the support column 2. The leg frame 1 has a pair of left and right casters 4b, 4b; 4f, 4f on the rear end side 1b of the support column 2 and the front end side 1f. Has a configuration in which the front end side 1f and the rear end side 1b are connected by a connecting portion 1c. The support column 2 is configured to be capable of extending and contracting, so that the height of the top plate 3 can be adjusted. Reference numeral 5 denotes an operation member for adjusting the height of the support 2.

  As shown in the figure, the caster 4f on the front end side 1f has a smaller wheel diameter than the caster 4b on the rear end side 1b. In this embodiment, the caster 4b on the rear end side 1b is configured as a caster with a brake mechanism, and the caster 4f on the front end side 1f has no brake mechanism, so that a smaller diameter can be used. On the front end side 1f, the caster 4f is configured without a brake mechanism, and the brake mechanism B is configured between the casters 4f on the front end side 1f.

Next, the structure of the brake mechanism B formed between the casters 4f on the front end side 1f will be described.
Reference numeral 7 denotes a brake piece support member, and the brake piece support member 7 is supported by the rotation support portion 8 so as to be rotatable around a horizontal axis. The brake piece support member 7 is formed with an operation plane portion 11 bent at a right angle from a mounting plane portion 10 to which a brake piece 9 made of an elastic friction material is attached, and an operation piece 12 is formed at the center of the operation plane portion 11. Is bent. A slit 14 for turning the brake piece support member 7 by moving the end member 13 of the inner cable 6i from the operation plane portion 11 to the operation piece 12 is formed. Further, a torsion coil spring 15 is interposed between the front end side 1 f and the brake piece support member 7 at the position of the rotation support portion 8. As described above, the control cable, the outer cable, and the inner cable are also denoted by reference numerals 6c, 6o, and 6i, respectively.

  As described above, the brake mechanism of this embodiment is configured so that the brake piece 9 can be projected and retracted below the lower end of the small-diameter caster 4f by the rotation of the brake piece support member 7. The brake piece support member 7 is configured to be urged by the torsion coil spring 15 in the brake operation direction and to release the brake operation by the control cable 6c.

  As described above, the brake mechanism and the brake mechanism B provided on the caster 4b itself on the rear end side 1b are both configured to perform a brake operation by urging a spring and to release the brake operation using a control cable. Control cables from these brake mechanisms are operated by the brake operation mechanism according to the present invention. At this time, in order to operate the control cables from all the brake mechanisms by the common brake operation mechanism, the inner cables of the plurality of control cables on the brake mechanism side are collectively connected to the inner cable of the common control cable. Alternatively, a cable branching device as described in Patent Document 1 can be used.

Next, the main part of the brake operation mechanism will be described.
Reference numeral 16 denotes a casing provided between the support column 2 and the top plate 3. The casing 16 serves as both a member that receives the load of the top plate 3 and a member that constitutes a brake operation mechanism.
Reference numeral 17 denotes a substrate fixed to the casing 16, and a lever plate 18 provided with an operation lever 19 is supported on the substrate 17 so as to be rotatable in a horizontal direction by a rotation support portion 20. The lever plate 18 is provided at a position where the inner cable 6i is pulled when the operation lever 19 and the lever plate 18 are rotated clockwise in the drawing at a predetermined distance from the rotation support portion 20. An inner cable connecting portion 21 is provided, and an end portion of the inner cable 6i is connected thereto. The casing 16 is provided with a fixed handle 22 outside the stroke end when the operating lever 19 rotates clockwise. Further, the casing 16 is provided with a stopper shaft 23 that can be rotated around a horizontal axis along the rotation direction below the locus of the rotation stroke of the operation lever 19, and both end sides thereof are provided outside the casing 16. The operation shaft 24 is disposed and a stopper 25 is provided on the stopper shaft 23 corresponding to the vicinity of the stroke end of the clockwise rotation of the operation lever 19. The stopper 25 is configured to be rotated and lowered by its own weight.

Next, the operation of the embodiment of the brake operation mechanism of the present invention having the above configuration will be described.
First, normally, when the operation handle 19 is left at the position shown in FIGS. 1, 3 to 5, and 8, the brake mechanism provided on the caster 4 b itself on the rear end side 1 b of the leg frame 1. In addition, the brake mechanism provided between the casters 4f on the front end side 1f is maintained in the brake operation state by the urging of the spring provided thereon, so the table, in this embodiment, the bedside table is maintained in an immobile state. Therefore, it can be used as an auxiliary means for supporting the body, and is safe because it does not move even if the body weight is unexpectedly applied.

  Next, when the table is moved, when the operation handle 19 is rotated clockwise from one end side to the other end side of the rotation stroke, as shown in FIG. Since the inner cable connecting portion 21 pulls the inner cable 6i, the control cable 6c can operate the brake mechanism described above against the bias of the springs provided to release the brake operation.

  If the hand is released from the operation handle 19 in this state, the lever plate 18 is pulled by the inner cable 6i to return to the original position shown in each of the above-described drawings, and therefore the brake mechanism is in the brake operation state. Therefore, the table cannot be moved.

  For this reason, as described above, if the operator holds the operation handle 19 with the hand in the state where the operation handle 19 is positioned at or near the stroke end in the rotation direction, the release state of the brake operation can be maintained. Although the table can be moved in this state, the operation handle 19 must be held.

  Therefore, in the present invention, the stopper shaft 23 is rotated by the operation portion 24 in a state where the operation handle 19 is positioned at or near the stroke end in the rotation direction, that is, in the position shown in FIG. As shown in FIGS. 6 and 10, the stopper 25 can be projected into the turning locus of the operation handle 19.

  If the hand is released from the operation handle 19 in this state, the operation handle 19 which tries to return to the original position from the stroke end will resiliently press the stopper 25, so that the stopper 25 cannot be rotated and lowered by its own weight. The operation handle 19 is held.

  With the stopper 25 thus protruding, the operation handle 19 can be held in the vicinity of the stroke end in the rotational direction, so that the state where the inner cable 6i of the control cable 6c is pulled can be maintained. The released state of the brake operation of the brake mechanism can be maintained. Therefore, the operator can maintain the release state of the brake operation while releasing his hand from the operation handle 19, which is convenient for movement.

  After the table is moved to a predetermined position, the stopper shaft 23 is rotated by the operation unit 24 to move the stopper 25 below the rotation locus of the operation handle 19, thereby moving the operation handle 19 in FIGS. It can be returned to the position shown in FIGS. In this embodiment, since the stopper 25 is configured to rotate and descend by its own weight, when the operation handle 19 is further rotated to the stroke end, the stopper 25 rotates the stopper shaft 23 by its own weight. As it moves and descends and is located outside the trajectory of the operation handle 19, the operation handle 19 can be returned to its original position without being stopped by the stopper 25 when the hand is released from the operation handle 19. .

  The operation handle 19 can be returned to the position shown in FIG. 1, FIG. 3 to FIG. 5 and FIG. 8 only by the urging of the spring provided in the brake mechanism. It can also be configured to ensure the return operation.

  As described above, in the present invention, the stopper 25 for maintaining the release state of the brake operation of the brake mechanism can appear in the rotation locus of the operation handle 19 in the vicinity of the stroke end of the operation handle 19 in the rotation direction. In this configuration, the rotation of the operation handle 19 is directly prevented, so that an intuitive and reliable operation is possible.

  Furthermore, in this embodiment, if a fixed handle is provided outside the stroke end of the operation handle in the casing, the operation handle can be very easily operated using the fixed handle as a finger hook.

Next, the operation of the brake mechanism provided between the casters 4f on the front end side 1f in this embodiment of the present invention will be described.
First, when the operation handle 19 is left in the position shown in FIG. 1, FIG. 3 to FIG. 5 and FIG. 8, the inner cable 6i of the control cable 6c is not pulled, so In the brake mechanism, the brake piece support member 7 biased by the torsion coil spring 15 rotates as shown in FIGS. 12 to 15, and the brake piece 9 is below the lower end of the small-diameter caster 4f. It will be in a protrusion state, and the movement of the front-end side 1f of the leg frame 1 is blocked | prevented by this.

  Next, when the operation handle 19 is rotated clockwise from the above-described position, the inner cable connecting portion 21 of the lever plate 18 pulls the inner cable 6i as shown in FIG. , The inner cable 6i of the control cable 6c pulls the operation piece 12 of the brake piece support member 7, so that the brake piece support member 7 rotates as shown in FIGS. 16 and 17, and the brake piece 9 has the small diameter. The caster 4f moves above the lower end of the caster 4f, and thus the front end side 1f of the leg frame 1 can be moved by the caster 4f having a small diameter.

  This brake mechanism is suitable for a bedside table that moves the front end side 1f of the leg frame 1 to the space below the bed. In this configuration, the wheels of the caster are compared with the case where the brake mechanism is configured on the caster itself. Even in this case, the caster itself does not cause such disadvantages that the turning property is lowered, the breaker is easily broken, and the traveling property is lowered due to tangled hair dust.

  Note that a member denoted by reference numeral 26 is a stopper projecting outside the operation plane portion 11, and the brake piece support member 7 is rotated by the bias of the torsion coil spring 15. When the brake piece 9 is in a predetermined protruding state below the lower end of the small-diameter caster 4f, it comes into contact with the wall surface of the member constituting the front end side 1f, so that the brake piece support member 7 can be further rotated. It prevents movement.

In the above embodiment, the brake operation mechanism of the present invention is applied to a bedside table. However, the brake operation mechanism of the present invention can also be applied to an overbed table as shown in FIG.
The reference numeral 101 will be described. Reference numeral 101 is a pair of leg frames, and the top plate 103 is supported by a support column 102 standing upright at an intermediate position between the leg frames 101. The support column 102 is configured to be adjustable in length, and casters 104 are provided on the front and rear sides of the pair of leg frames 101.

  In this embodiment, all of these casters 104 are configured with a brake mechanism, and are interlocked by the above-described brake operation mechanism of the present invention having the operation handle 19 and the fixed handle 22 as elements. The operation is performed.

  As can be seen from the first and second embodiments described above, the brake operation mechanism of the present invention can be applied to an appropriately configured table that can be moved by a caster. Any of these may be provided separately from the casters or may be mixed.

DESCRIPTION OF SYMBOLS 1 Leg frame 1f Front end side 1b Rear end side 1c Connection part 2 Support | pillar 3 Top plate 4f, 4b Caster 5 Operation member 6c Control cable 6o Outer cable 6i Inner cable 7 Brake piece support member 8 Rotation support part 9 Brake piece 10 For attachment Flat portion 11 Flat portion for operation 12 Operation piece 13 End member 14 Slit 15 Torsion coil spring 16 Casing 17 Substrate 18 Lever plate 19 Operation lever 20 Rotation support portion 21 Inner cable connection portion 22 Fixed handle 23 Stopper shaft 24 Operation portion 25 , 26 Stopper

Claims (7)

A caster for movement and a brake mechanism are provided on the leg portion where the column supporting the top plate is erected, and this brake mechanism is configured to perform a brake operation by urging a spring and release the brake operation by a control cable. And a table provided with an operation handle for operating the control cable, the operation handle is supported by a casing provided below the end of the top plate so as to be rotatable in a horizontal direction, and an inner cable of the control cable is provided. A stopper for preventing the operation handle from rotating in the direction of the other stroke end is provided near the stroke end in the rotational direction of the operation handle for pulling to release the brake operation of the brake mechanism. In a movable table characterized by being able to appear and retract in the rotation trajectory of Brake operation mechanism. 2. The brake operating mechanism for a movable table according to claim 1, wherein the brake mechanism is constituted by all casters provided on the legs. The brake mechanism is configured such that the brake piece support member is rotatably supported on the leg portion, and the brake piece can be projected and lowered below the lower end of the caster by the rotation of the brake piece support member. The brake operation mechanism in the movable table of Claim 1. The brake operation mechanism for a movable table according to any one of claims 1 to 3, wherein the casing is provided with a fixed handle outside the stroke end of the operation handle. The casing is provided with a stopper shaft that can be rotated according to the stroke direction of the operation handle. The stopper shaft protrudes from the stopper shaft, and the stopper shaft is rotated by an operation portion arranged outside the casing. The brake operating mechanism in the movable table according to any one of claims 1 to 4, wherein the stopper can be moved in and out of the rotation trajectory of the operation handle. The stopper is configured to be positioned in a rotation locus of the operation handle in a state where the stopper is rotated and raised by the stopper shaft, and to be positioned outside the rotation locus of the operation handle in a state where the stopper is rotated and lowered by its own weight. 6. A brake mechanism for a movable table according to item 5. The brake operating mechanism for a movable table according to any one of claims 1 to 5, wherein the casing is a member that is provided between the column and the top plate and receives a load.

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