JP5981378B2 - Bedside table brake mechanism - Google Patents

Description

  The present invention relates to a brake mechanism for a bedside table.

  It is composed of a leg frame, a column that is erected on the end side of the leg frame, and a top plate that is supported by the column, and each of the leg frame on the rear end side where the column is erected and on the front end side, A bedside table having a pair of left and right casters is used by moving the leg frame from the side to the space below the bed and positioning the top plate on the bed floor.

  The bedside table used in this way may be used as an auxiliary means for supporting the body or depending on the case, or may suddenly put on the weight. A brake mechanism that makes it impossible to move is necessary.

  As a conventional example of such a bedside table, for example, there is one described in Patent Document 1. 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.

  A mechanism for operating all casters attached to a moving device such as a carriage or a chair with a common operation handle is also described in Patent Document 2.

JP 2011-182896 A JP 2008-137630 A

  Incidentally, in the bedside table, it is desired that the leg frame to be moved to the space below the bed is made as low as possible in response to the bed being gradually lowered.

  For this reason, also in the bedside table described in Patent Document 1, among the casters provided on the leg frame, the casters on the front end side of the leg frame moving to the space below the bed are the rear end side as described above. It has a smaller diameter than the casters.

  However, in the bedside table described in Patent Document 1, since all casters including such a small-diameter caster are configured with a brake mechanism, the small-diameter caster is deteriorated in turnability and easily broken. In addition, there are disadvantages such as hair tangled and the running performance is lowered.

  Moreover, although it has a small diameter, since there is a limit in incorporating the brake mechanism, there is a disadvantage that there is a limit in lowering the leg frame.

  The object of the present invention is to solve the problems described above.

  In order to solve the above-mentioned problems, the present invention comprises a leg frame, a support column standing on the end side of the leg frame, and a top plate supported by the support column. In the bedside table provided with a pair of left and right casters on each of the rear end side and the front end side provided, the rear end caster is configured as a caster with a brake mechanism, and the front end caster is a brake mechanism The brake piece support member is rotatably supported between the casters on the front end side, and the brake piece is supported by the rotation of the brake piece support member. The caster with the brake mechanism and the brake piece support member are urged by a spring in the brake operation direction. Together and configured to release the brake operation by the control cable is an operation lever for operating the control cable proposes a brake mechanism bedside table provided on the top plate side.

  The present invention proposes a brake mechanism for a bedside table in which the control cable corresponding to the caster with the brake mechanism and the brake piece support member can be operated with a common operation handle in the above configuration.

  In the brake mechanism of the bedside table of the present invention, the pair of casters on the front end side of the leg frame to be moved to the space below the bed are casters without the brake mechanism, and the brake piece support member is rotatably supported between them. Thus, the brake mechanism is configured by the configuration in which the brake piece can be projected and retracted. For this reason, the caster itself can be configured to have a smaller diameter without causing the conventional disadvantages that the swirlability is lowered, the breakage is easily caused, and the hair is entangled and the runnability is lowered. Thus, the height of the front end side of the leg frame to be moved to the space below the bed can be further reduced.

  The brake mechanism on the front end side of the leg frame can be configured to be operable by a common operation handle together with the brake mechanism of the caster on the rear end side of the leg frame.

FIG. 1 is an explanatory perspective view of a first embodiment of the present invention. 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. 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.

Next, an embodiment of a brake mechanism according to the present invention will be described with reference to FIGS.
As shown in the drawing, the bedside table of this embodiment is composed of a leg frame 1, a column 2 standing on the end side of the leg frame 1, and a top plate 3 supported on the column 2. The leg frame 1 is provided with 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, respectively. 1f and the rear end 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. In the present invention, the caster 4f is configured without the brake mechanism on the front end side 1f, 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 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.

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.

  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. The stopper 25 can be configured to rotate and descend by its own weight. In such a configuration, when the operation handle 19 is further rotated to the stroke end, the stopper 25 is rotated and lowered together with the rotation of the stopper shaft 23 due to its own weight, and is out of the rotation locus of the operation handle 19. Therefore, when the hand is released from the operation handle 19, the operation handle 19 can be returned to the original position without being stopped by the stopper 25.

  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, thereby, the movement of the front end side 1f of the leg frame 1 is prevented.

  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.

  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.

  The brake mechanism of the present invention is very 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, compared to the case where the brake mechanism is configured on the caster itself, The wheels of the caster can be configured to have a smaller diameter, and even in this case, the caster itself does not cause the disadvantage that the turning performance is lowered, the wheel becomes fragile, and the running performance is lowered due to tangled hair.

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 (2)

It is composed of a leg frame, a column that is erected on the end side of the leg frame, and a top plate that is supported by the column, and each of the leg frame on the rear end side where the column is erected and on the front end side, In a bedside table provided with a pair of left and right casters, the rear end caster is configured as a caster with a brake mechanism, and the front end caster is configured as a small-diameter caster without a brake mechanism. Between the casters, a brake piece support member is rotatably supported, and the brake piece support member is configured so that the brake piece can be projected and lowered below the lower end of the small-diameter caster by rotating the brake piece support member. The caster with a mechanism and the brake piece support member are urged by a spring in the direction of the brake operation and braked by the control cable. A structure for releasing the work, bedside table of a brake mechanism, characterized in that a control lever for operating the control cable to the top plate side. The bedside table brake mechanism according to claim 1, wherein a control cable corresponding to a caster with a brake mechanism and a brake piece support member can be operated by a common operation handle.

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