JP7469187B2 - Mobile table - Google Patents

Description

An embodiment of the present invention relates to a mobile table.

As movable tables, bedside tables and overbed tables have been proposed for use near the bed. When in use, the bedside table is moved from the bedside in the width direction of the bed and placed in a specified position. When in use, the overbed table is moved from the foot side of the bed in the length direction of the bed and placed in a specified position. Such movable tables are provided with casters to facilitate movement of the movable table and brakes to prevent the movable table from moving once placed.

For example, a brake has been proposed that is rotatably attached to the legs of a movable table. When applying braking with such a brake, the brake is rotated toward the floor so that the brake pad comes into contact with the floor or the like. When moving the movable table, the brake is rotated toward the legs so that the brake pad is separated from the floor or the like (see, for example, Patent Document 1).
However, simply providing a rotatable brake poses the problem that the braking force has a directional nature.

For this reason, a movable table has been proposed that includes legs that are inclined with respect to the short side of the table top in a plan view and extend outward from the movable table, and rotatable brakes provided on the legs (see, for example, Patent Document 2).
In this way, it is possible to prevent the braking force from having a directional property. However, providing legs that extend outward from the movable table creates a new problem in that the movable table takes up a larger space. If the movable table takes up a larger space, it may be possible for the table to be used in a limited manner, resulting in reduced versatility.
Therefore, there has been a demand for the development of a movable table that can be made smaller and has improved versatility.

JP 2016-158902 A JP 2016-209396 A

The problem that this invention aims to solve is to provide a mobile table that can be made compact and has improved versatility.

The mobile table according to the embodiment includes a frame, a tabletop provided on the frame, a pair of support posts provided on the side of the frame opposite to the side on which the tabletop is provided, legs provided on the undersides of the support posts, a number of casters provided on the legs, and at least one brake provided on the legs. The legs are provided on each of the pair of support posts so as to be approximately parallel to each other. The brake includes a fixed shaft provided on the leg, a brake pad provided to be rotatable around the fixed shaft, and a biasing member that biases the brake pad in a direction away from the leg.

According to an embodiment of the present invention, a mobile table is provided that can be made compact and has improved versatility.

1 is a schematic perspective view illustrating a movable table according to an embodiment of the present invention; FIG. 2 is a schematic enlarged view of a portion A of the movable table in FIG. 1 . FIG. 2 is a schematic enlarged view of a portion B of the movable table in FIG. 1 . 4A and 4B are schematic diagrams illustrating a brake. 4A and 4B are schematic diagrams illustrating a brake. 2 is a schematic diagram illustrating an arrangement of a pair of brakes 7. FIG. 4A to 4D are schematic plan views illustrating the relationship between the arrangement of the brake 7 and the directionality of the braking force. 2 is a schematic perspective view illustrating the configuration of a brake operating portion. FIG. 4A to 4C are schematic partial cross-sectional views for illustrating the configuration of a conductive portion. 11 is a schematic perspective view illustrating a lock portion. FIG. 11 is a schematic perspective view for illustrating the positional relationship between the transmission lever and a stopper. FIG. FIG. 11A and 11B are schematic cross-sectional views illustrating the function of a stopper. 13A and 13B are schematic perspective views illustrating a locking portion according to another embodiment. 11A and 11B are schematic cross-sectional views illustrating the function of a stopper.

Hereinafter, an embodiment will be described with reference to the drawings. In the drawings, the same components are denoted by the same reference numerals, and detailed description thereof will be omitted as appropriate.
In each drawing, arrows X, Y, and Z represent three mutually orthogonal directions. For example, arrow X represents the left-right direction, arrow Y represents the front-rear direction, and arrow Z represents the up-down direction.

FIG. 1 is a schematic perspective view illustrating a movable table 1 according to the present embodiment.
FIG. 2 is a schematic enlarged view of a portion A of the movable table 1 in FIG.
FIG. 3 is a schematic enlarged view of a portion B of the movable table 1 in FIG.

The movable table 1 according to the present embodiment can be, for example, an overbed table used near a bed, etc. However, the uses of the movable table 1 are not limited to those exemplified above.
As shown in FIG. 1 , the movable table 1 can be provided with a top plate 2 , a frame 3 , a support 4 , legs 5 , casters 6 , a brake 7 , and a brake operating unit 8 .

The tabletop 2 can be, for example, a plate-like body with a roughly rectangular planar shape. In this specification, the "planar shape" can be the shape when viewed from the top-bottom direction (the direction of the arrow Z). The "plan view" can be the shape when viewed from the top-bottom direction (the direction of the arrow Z). The movable table 1 is installed across the bed. Therefore, the longitudinal length of the tabletop 2 can be longer than the width dimension of the bed on which the movable table 1 is installed.

The frame 3 may be a box-shaped body with an open top end. The planar shape of the frame 3 may be approximately rectangular. The longitudinal length of the frame 3 may be the same as or smaller than the longitudinal length of the tabletop 2. The lateral length of the frame 3 may be smaller than the lateral length of the tabletop 2. The tabletop 2 may be provided on the opening side of the frame 3. The end of the opening side of the frame 3 may be attached to the rear surface of the tabletop 2 using a fastening member such as a screw. The opening of the frame 3 is covered by attaching the tabletop 2.

A pair of support posts 4 can be provided. The support posts 4 can be provided between the frame 3 and each of the pair of legs 5. In the longitudinal direction of the frame 3, one support post 4 can be provided near each end on both sides of the bottom surface of the frame 3. The support posts 4 are also configured to be extendable and retractable in the vertical direction. Therefore, the top plate 2 can be moved to any position in the vertical direction.

For example, the support 4 can have an outer tube 41 and an inner tube 42. The outer tube 41 is cylindrical, with one end provided on the bottom surface of the frame 3. The inner tube 42 is cylindrical, with one end provided inside the outer tube 41. One end of the inner tube 42 is provided on the leg 5. The other end of the inner tube 42 is provided in the internal space of the outer tube 41. It is more preferable that the outer tube 41 and the inner tube 42 are rectangular cylindrical.

A locking mechanism can be provided on the outer tube 41 or the inner tube 42. The locking mechanism can be operated by a lever 43. As shown in Figs. 1 and 2, one lever 43 can be provided on each side of the frame 3 in the longitudinal direction. For example, the lock can be released by gripping the lever 43, and the position of the outer tube 41 relative to the inner tube 42, and therefore the position of the tabletop 2 in the vertical direction, can be adjusted. For example, the position of the outer tube 41 relative to the inner tube 42, and therefore the position of the tabletop 2 in the vertical direction, can be fixed by releasing the lever 43.

As shown in FIG. 1, the legs 5 can be provided on the side of the frame 3 opposite to the side on which the tabletop 2 is provided. A pair of legs 5 can be provided. One leg 5 can be provided for each support 4. The legs 5 can have a shape that extends in the short direction of the tabletop 2. The length of the legs 5 can be longer than the length of the tabletop 2 in the short direction. The pair of legs 5 can be provided so as to be approximately parallel to each other.

As shown in FIG. 3, the leg 5 can have a top surface 51, a side surface 52, and a side surface 53. The top surface 51, the side surface 52, and the side surface 53 can be formed integrally. The top surface 51 can be a plate-like body having a substantially rectangular planar shape. The side surface 52 is provided on one long side of the top surface 51 and extends in a direction intersecting with the top surface 51. The side surface 53 faces the side surface 52. The side surface 53 is provided on the other long side of the top surface 51 and extends in a direction intersecting with the top surface 51.

As shown in FIG. 1, a pair of casters 6 can be provided for each leg 5. A bracket 61 is provided at the end of the leg 5, and the caster 6 is provided so as to be rotatable relative to the bracket 61. The bracket 61 can be plate-shaped (see FIG. 8, for example). A cover 62 can be provided to cover the upper part of the bracket 61. If the cover 62 is provided, the mounting portion of the caster 6 and the bracket 61 can be hidden. This can improve the commercial value.

1, a pair of brakes 7 can be provided for one leg 5. The brakes 7 can be provided in the vicinity of the casters 6 on the support post 4 side.
4( a ) to 5 ( b ) are schematic diagrams illustrating the brake 7 .
4(a) and 4(b) show the brake 7 in the braking state.
5(a) and 5(b) show the brake 7 in the released state.
As shown in FIGS. 4( a ) to 5 ( b ), the brake 7 can have a bracket 71 , a brake pad 72 , a fixed shaft 73 , and a biasing member 74 .

The bracket 71 can have a pair of side plates 71a facing each other and a side plate 71b intersecting the side plates 71a. A hole through which the fixed shaft 73 is inserted can be provided in the pair of side plates 71a. A brake pad 72 can be provided on the end surface of the bracket 71 (the main surface of the side plate 71b). For example, the side plate 71b can be provided with a female thread for screwing the brake pad 72.

The brake pad 72 may be, for example, substantially rectangular. The brake pad 72 may be provided with, for example, a hole for inserting a bolt and a recess for sinking the head of the bolt. The brake pad 72 may be formed, for example, from hard rubber or resin.

The fixed shaft 73 can be attached to a bracket 54 provided inside the leg 5. The bracket 71 is provided so as to be rotatable around the fixed shaft 73. This allows the position of the brake pad 72 relative to the floor or the like to be changed. A stopper 55 can be provided on the bracket 54. When the bracket 71 comes into contact with the stopper 55, it is possible to prevent the bracket 71 from rotating too much.

The biasing member 74 biases the bracket 71 in a direction away from the leg 5. That is, the biasing member 74 rotates the bracket 71 toward the floor so that the brake pad 72 comes into contact with the floor or the like. That is, in the mobile table 1 according to this embodiment, the biasing member 74 keeps the brake pad 72 in constant contact with the floor or the like (always in a braking state). When releasing the braking state, the brake operating unit 8 moves the brake pad 72 away from the floor or the like.

The biasing member 74 illustrated in Figures 4(a) to 5(b) is a torsion coil spring. The biasing member 74 can also be a tension spring or a compression spring. However, using a torsion coil spring can help make the device more compact.

FIG. 6 is a schematic diagram illustrating an arrangement of a pair of brakes 7. As shown in FIG.
FIG. 6 is a rear view of the leg 5 on which a pair of brakes 7 are provided.
As shown in Fig. 1, the pair of legs 5 are arranged side by side and spaced apart in the X direction. Therefore, in a plan view, the arrangement of the pair of brakes 7 provided on one leg 5 can be arranged to be substantially linearly symmetrical with the arrangement of the pair of brakes 7 provided on the other leg 5, with the center line 1a of the movable table 1 as the axis of symmetry (see Fig. 7(d)). Note that the center line 1a of the movable table 1 in a plan view can be a line that passes through the center of the top board 2 and is substantially parallel to the short side direction of the top board 2 (see Figs. 7(a) to (d)).
As shown in FIG. 6, in a plan view, the fixed shaft 73 of the brake 7 is inclined with respect to a direction perpendicular to the direction in which the leg 5 extends.

7A to 7D are schematic plan views illustrating the relationship between the arrangement of the brakes 7 and the directionality of the braking force. 7A to 7D are views of the leg 5 on which a pair of brakes 7 are provided, as viewed from the back side.
7(a) to (c) show the arrangement of the brake 7 according to a comparative example, and FIG. 7(d) shows the arrangement of the brake 7 according to the present embodiment.

First, the braking force of the brake 7 will be explained. When the leg 5 is viewed from the back, if the brake pad 72 is located further forward in the direction of travel of the movable table 1 than the fixed shaft 73, the bracket 71 rotates in a direction in which it bites into (is pressed against) the floor or the like as the movable table 1 moves. This results in a large braking force. On the other hand, when the leg 5 is viewed from the back, if the brake pad 72 is located further rearward in the direction of travel of the fixed shaft 73 than the fixed shaft 73, the bracket 71 rotates in a direction in which it moves away from the floor or the like as the movable table 1 moves. This results in a small braking force. The braking force is also small when the direction of travel of the movable table 1 is the direction in which the fixed shaft 73 extends.

In this case, by providing a pair of brakes 7 on one leg 5 and reversing the positional relationship between the brake pad 72 and the fixed shaft 73 in one brake 7 from the positional relationship between the brake pad 72 and the fixed shaft 73 in the other brake 7, it is possible to increase the braking force of one of the brakes in the direction of movement of the movable table 1.

7A, for example, the braking force against the movement in the Y direction can be increased, but the braking force against the movement in the X direction is decreased.
For example, in the case shown in Fig. 7B, the braking force against the movement in the X direction can be increased, but the braking force against the movement in the Y direction is decreased.
In other words, whether the direction in which the fixed shaft 73 of the brake 7 extends is parallel to the direction in which the legs 5 extend or perpendicular to the direction in which the legs 5 extend, a directionality is produced in the braking force.

In this case, as shown in FIG. 7(c), by tilting the direction in which the legs 5 extend relative to the center line 1a of the movable table, the braking force against movement in the X direction and the braking force against movement in the Y direction can be improved. In other words, the occurrence of directional characteristics in the braking force can be suppressed. If the occurrence of directional characteristics in the braking force can be suppressed, the movable table can be prevented from moving even if a force is applied to the movable table from an unintended direction.

However, if the direction in which the legs 5 extend is tilted relative to the center line 1a of the movable table, the legs 5 will protrude outside the movable table. This creates a new problem in that the space occupied by the movable table 1 will increase. Also, if the movable table is an overbed table, it will be difficult to move the movable table from the foot side of the bed in the longitudinal direction of the bed.

Therefore, in the mobile table 1 according to this embodiment, as shown in FIG. 7(d), the center line 1a of the mobile table is approximately parallel to the direction in which the legs 5 extend. The fixed shaft 73 of the brake 7 is tilted in a direction perpendicular to the direction in which the legs 5 extend. In this case, as shown in FIG. 6 and FIG. 7(d), the tilt direction of the fixed shaft 73 of one brake 7 is opposite to the tilt direction of the fixed shaft 73 of the other brake 7.

In this way, the difference between the braking force for movement in the X direction and the braking force for movement in the Y direction can be reduced. Also, sufficient braking force can be obtained in the direction between the X direction and the Y direction. Also, since the center line 1a of the movable table 1 and the direction in which the legs 5 extend are approximately parallel, the legs 5 do not protrude outside the movable table 1. Therefore, the space occupied by the movable table 1 can be reduced. With the movable table 1 according to this embodiment, it is possible to prevent the braking force from having a directional property and to reduce the space occupied. Also, it is possible to reduce the size of the movable table 1 and improve its versatility.

In addition, if the center line 1a of the movable table 1 is approximately parallel to the direction in which the legs 5 extend, it is easy to move the movable table 1 from the foot side of the bed in the longitudinal direction of the bed. Therefore, the movable table 1 can be suitably used as an overbed table.

As shown in FIG. 7(d), when the angle θ between the direction perpendicular to the direction in which the legs 5 extend and the center line of the fixed shaft 73 is changed, the braking force against movement in the X direction and the braking force against movement in the Y direction change. For example, when the angle θ is set to 45°, the braking force against movement in the X direction and the braking force against movement in the Y direction can be made approximately the same.

Here, when the movable table 1 is used as an overbed table, a bed is provided between the legs 5. Therefore, the bed becomes an obstacle to the movement of the movable table 1 in the X direction. In other words, when the movable table 1 is used as an overbed table, it is preferable that the braking force against the movement in the Y direction is greater than the braking force against the movement in the X direction. For example, if the angle θ is less than 45°, the braking force against the movement in the Y direction can be made greater than the braking force against the movement in the X direction. According to the knowledge obtained by the inventor, it is preferable to set "20°≦θ<45°", and it is even more preferable to set "30°≦θ<45°".

The movable table 1 can also be used without straddling the bed. If the movable table 1 does not straddle the bed, the optimal angle may vary between 0°<θ<90° depending on the material of the brake pad 72 and the mechanism of the brake 7.

The brake operating unit 8 releases the brake 7 from its braking state. In other words, when moving the movable table 1, the operator operates the brake operating unit 8 so that the brake pad 72 moves away from the floor or the like.

FIG. 8 is a schematic perspective view illustrating the configuration of the brake operating unit 8.
As described above, in a plan view, the arrangement of the pair of brakes 7 provided on one leg 5 can be made to be approximately line-symmetrical with the arrangement of the pair of brakes 7 provided on the other leg 5, with the center line 1a of the movable table 1 as the axis of symmetry. Therefore, the brake operating unit 8 can have a configuration that is approximately line-symmetrical with the center line 1a of the movable table 1 as the axis of symmetry. Therefore, in Fig. 8, the pair of brakes 7 provided on one leg 5 is depicted, and the pair of brakes 7 provided on the other leg 5 is omitted.

As shown in FIG. 8 , the brake operating portion 8 may include an operating portion 81 , a transmission lever 82 , a transmission portion 83 , a transmission lever 84 , a buffer member 85 , a wire 86 , and a wire 87 .
Although the wires 86 and 87 are shown as an example, links or the like can be used in place of the wires 86 and 87 .
The operation unit 81 may have an operation lever 81 a, a shaft 81 b, and a transmission lever 81 c. The operation unit 81 may be provided on the outside of the frame 3.

The operating lever 81a can be provided at one end of the shaft 81b, or at both ends of the shaft 81b. The operating lever 81a may be provided at any position on the shaft 81b. The operating lever 81a is plate-shaped, and one end is provided on the shaft 81b. In a plan view, the other end of the operating lever 81a is provided on the outside of the tabletop 2.

The shaft 81b is rotatably provided on a side surface of the frame 3. The shaft 81b extends in the longitudinal direction of the frame 3.
As shown in Fig. 11, which will be described later, the transmission lever 81c can be provided at approximately the center of the shaft 81b. The transmission lever 81c can be provided at any position on the shaft 81b, such as near both ends of the shaft 81b. The transmission lever 81c has a plate shape, and one end is provided on the shaft 81b. One end of the wire 86 is provided to the other end of the transmission lever 81c.

A pair of transmission levers 82 are provided inside the frame 3. In the longitudinal direction of the frame 3, the transmission levers 82 can be provided near each of the ends on both sides of the frame 3. The transmission lever 82 has a plate shape and can be provided, for example, approximately parallel to the bottom surface of the frame 3. A hole is provided near one end of the transmission lever 82, and the end of the transmission part 83 (connection part 83a1 of the outer shaft 83a) is provided inside the hole. The other end of the wire 86 is provided at the other end of the transmission lever 82.

The transmission part 83 extends inside the support 4 and transmits the force from the operating lever 81a to the pair of brakes 7. A pair of transmission parts 83 can be provided. In the longitudinal direction of the frame 3, one transmission part 83 can be provided near each end of the frame 3. The transmission part 83 is provided between the frame 3 and the leg 5. The transmission part 83 is provided inside the support 4. As mentioned above, the support 4 is configured to be expandable and contractable in the vertical direction. Therefore, the transmission part 83 is also configured to be expandable and contractable in the vertical direction.

FIG. 9 is a schematic partial cross-sectional view illustrating the configuration of the conductive portion 83.
As shown in FIG. 9, the conductive portion 83 can have an outer shaft 83a, an inner shaft 83b, and a guide 83c.

The outer shaft 83a may be, for example, a cylindrical shape with a polygonal cross-sectional outline. For example, as shown in FIG. 8, the outer shaft 83a may be a cylindrical shape with a square cross-sectional outline. The cross-sectional outline of the outer shaft 83a may be, for example, a hexagon.

As shown in FIG. 8, a columnar connection portion 83a1 can be provided at one end of the outer shaft 83a. The connection portion 83a1 can be provided approximately coaxially with the outer shaft 83a. One end of the connection portion 83a1 is provided on the outer shaft 83a. The vicinity of the other end of the connection portion 83a1 is rotatably provided on the bottom surface of the frame 3. The other end of the connection portion 83a1 is provided inside the hole of the transmission lever 82 described above.

The inner shaft 83b is provided inside the outer shaft 83a. The inner shaft 83b can be, for example, cylindrical with a polygonal cross-sectional outline. The inner shaft 83b can also be columnar with a polygonal cross-sectional outline. However, a cylindrical inner shaft 83b can be lightweight. The cross-sectional outline of the inner shaft 83b can be approximately similar to the cross-sectional outline of the outer shaft 83a.

In addition, a gap is provided between the inner wall of the outer shaft 83a and the outer wall of the inner shaft 83b. Therefore, the relative positions of the outer shaft 83a and the inner shaft 83b can be changed in the central axial direction of the transmission part 83. In other words, if the outer shaft 83a and the inner shaft 83b are provided, the transmission part 83 can be expanded and contracted in accordance with the expansion and contraction of the support 4 in the vertical direction. In addition, as described below, the rotational force of the outer shaft 83a can be transmitted to the inner shaft 83b via the guide 83c at any expansion and contraction position.

As shown in FIG. 8, a columnar connection portion 83b1 can be provided at one end of the inner shaft 83b. The connection portion 83b1 can be provided approximately coaxially with the inner shaft 83b. One end of the connection portion 83b1 is provided on the inner shaft 83b. The vicinity of the other end of the connection portion 83b1 is rotatably provided on the upper surface 51 of the leg 5. The other end of the connection portion 83b1 is provided inside the hole of the transmission lever 84.

As shown in FIG. 9, the guide 83c is provided at the end of the inner shaft 83b opposite to the end where the connection portion 83b1 is provided. In a direction perpendicular to the central axis of the conductive portion 83, the guide 83c determines the relative positions of the outer shaft 83a and the inner shaft 83b. The guide 83c is also capable of sliding inside the outer shaft 83a. The guide 83c is preferably formed from, for example, a resin having self-lubricating properties. The guide 83c can be formed from, for example, polyacetal, MC nylon, fluororesin, ultra-high molecular weight polyethylene, etc.

For example, as shown in Fig. 9, the guide 83c may have a head 83c1 and a holding portion 83c2. The head 83c1 and the holding portion 83c2 may be integrally formed.
The head 83c1 is plate-shaped and is provided at the end of the inner shaft 83b. The head 83c1 is exposed from the inner shaft 83b. The dimension of the head 83c1 in a direction perpendicular to the central axis of the inner shaft 83b can be larger than the dimension of the inner shaft 83b. Therefore, at least a portion of the head 83c1 of the guide 83c can come into contact with the inner wall of the outer shaft 83a.

The holding portion 83c2 is plate-shaped and may be provided in pairs. The pair of holding portions 83c2 may be provided facing each other at one end of the head 83c1. In addition, a convex portion 83c2a that protrudes outward may be provided on the outer surface of the holding portion 83c2. The convex portion 83c2a may be provided near the end of the holding portion 83c2 opposite the head 83c1.

The retaining portion 83c2 and the protruding portion 83c2a are provided inside the cylindrical inner shaft 83b. The outer surface of the retaining portion 83c2 can be brought into contact with the inner wall of the inner shaft 83b. As shown in FIG. 9, the protruding portion 83c2a is provided inside a hole provided on the side surface of the inner shaft 83b. If the protruding portion 83c2a is provided inside the hole, it is possible to prevent the guide 83c from coming off the inner shaft 83b.

Here, if the gap between the inner wall of the outer shaft 83a and the outer wall of the inner shaft 83b becomes large, the difference between the rotation angle of the transmission lever 82 and the rotation angle of the transmission lever 84 becomes large. As a result, the brake 7 may not be released, or the gap between the brake pad 72 and the floor or the like may become too small. On the other hand, if the gap between the inner wall of the outer shaft 83a and the outer wall of the inner shaft 83b is made small, the inner wall of the outer shaft 83a and the outer wall of the inner shaft 83b may interfere with each other, or a sliding noise may be generated. In this case, if the dimensional tolerance of the outer shaft 83a and the inner shaft 83b is reduced in order to reduce the gap between the inner wall of the outer shaft 83a and the outer wall of the inner shaft 83b, the manufacturing cost will increase.

The transmission part 83 according to this embodiment is provided with a guide 83c, so that the rotational force of the outer shaft 83a can be transmitted to the inner shaft 83b via the guide 83c. Therefore, even if the gap between the inner wall of the outer shaft 83a and the outer wall of the inner shaft 83b is increased, the difference between the rotational angle of the transmission lever 82 and the rotational angle of the transmission lever 84 can be prevented from increasing. In addition, the dimensional tolerance can be increased, so that the manufacturing cost can be reduced. In addition, the guide 83c (head 83c1) contains resin, so that the generation of sliding noise can be prevented.

As shown in FIG. 8, one transmission lever 84 can be provided inside each pair of legs 5. The transmission lever 84 is plate-shaped and can be provided, for example, approximately parallel to the upper surface 51 of the leg 5. A hole is provided in the center of the transmission lever 84, and an end of the transmission part 83 (connection part 83b1 of the inner shaft 83b) is provided inside the hole. The bracket 71 of the brake 7 is connected to each of the ends on both sides of the transmission lever 84 via a buffer member 85 and a wire 87.

Here, when rotating the bracket 71 of the brake 7 around the fixed shaft 73, it is preferable to pull the bracket 71 in a direction perpendicular to the center line of the fixed shaft 73. However, as shown in FIG. 8, the center line (center of rotation) of the fixed shaft 73 of the brake 7 is inclined with respect to the direction perpendicular to the extension direction of the leg 5. Therefore, the bracket 71 is pulled in a direction intersecting the center line of the fixed shaft 73, and the force rotating the bracket 71 is reduced by the generated component force. Furthermore, although a pair of brakes 7 are provided on one leg 5, there may be a difference in the direction in which the bracket 71 is pulled due to an error in the mounting position, etc. In this case, when the force rotating the bracket 71 is reduced, the difference in the force rotating the bracket 71 of the pair of brakes 7 becomes even larger. When the difference in the force rotating the bracket 71 becomes large, the brake 7 may not be released or the gap between the brake pad 72 and the floor, etc. may become too small.

Therefore, a buffer member 85 is provided between the transmission lever 84 and the bracket 71 .
For example, one end of the buffer member 85 can be connected to an end of the transmission lever 84. The other end of the buffer member 85 can be connected to the bracket 71 of the brake 7 via a wire 87. The buffer member 85 can be, for example, one that elastically deforms when a predetermined force is applied thereto. The buffer member 85 can be, for example, a tension spring. When there is a difference in the force that rotates the bracket 71 due to an error in the mounting position or the like, the amount of elastic deformation in the buffer member 85 to which a large force is applied increases, so that the difference in the force that rotates the bracket 71 can be reduced. Therefore, the rotational operation of the brake 7 can be made smoother.

Next, the operation of the brake operating portion 8 will be described.
As described above, the brake operating unit 8 is used to release the brake 7 from its applied state.
When releasing the braking state of the brake 7, the operator pulls up the operating lever 81a, for example, upward, as shown in Fig. 8. When the operating lever 81a is pulled up, the shaft 81b rotates, and the transmission lever 81c provided on the shaft 81b rotates a predetermined angle. When the transmission lever 81c rotates, the transmission lever 82 is pulled via the wire 86, and the transmission lever 82 rotates a predetermined angle.

When the transmission lever 82 rotates, the transmission lever 84 rotates a predetermined angle via the outer shaft 83a, guide 83c, and inner shaft 83b of the transmission part 83. When the transmission lever 84 rotates, the bracket 71 of the brake 7 is pulled via the buffer member 85 and wire 87. As a result, the bracket 71 rotates a predetermined angle around the fixed shaft 73, and the brake pad 72 provided on the bracket 71 moves away from the floor or the like. In this manner, the braking state of the brake 7 can be released.

When the brake 7 is put into the braking state, the operator simply releases the operating lever 81a. When the operator releases the operating lever 81a, the biasing member 74 causes the bracket 71 to rotate around the fixed shaft 73, and the brake pad 72 provided on the bracket 71 comes into contact with the floor or the like. This allows a braking force to be generated.

As described above, in the movable table 1 according to this embodiment, the brake pad 72 is constantly in contact with the floor or the like due to the biasing member 74. Therefore, even if an unintended force is applied to the movable table 1, the movable table 1 can be prevented from moving. When moving the movable table 1, the operator only needs to operate the operating lever 81a as described above.

In this case, when the operator releases the operating lever 81a, the biasing member 74 causes the brake pad 72 to come into contact with the floor or the like, generating a braking force. Therefore, while the movable table 1 is moving, the operator cannot release the operating lever 81a, which may cause a heavy burden on the operator when the moving distance is long.

1 and 8, a locking unit 9 can be further provided on the movable table 1. The locking unit 9 maintains the brake 7 in a released state when the brake operating unit 8 applies pressure to the brake 7.
FIG. 10 is a schematic perspective view illustrating the lock portion 9. As shown in FIG.
FIG. 11 is a schematic perspective view illustrating the positional relationship between the transmission lever 81c and the stopper 91. As shown in FIG.
FIG. 12 is a schematic exploded view of the lock portion 9. As shown in FIG.
13A and 13B are schematic cross-sectional views illustrating the function of the stopper 91.

As shown in FIGS. 10 to 13B, the lock portion 9 can be provided with a stopper 91 and a cover 92.
The cover 92 covers the portion of the shaft 81b where the transmission lever 81c is provided. The stopper 91 can be provided on the side surface of the cover 92.

As shown in FIGS. 12 to 13(b), the stopper 91 can be provided with a stop button 91a and a biasing member 91b.
The stop button 91a may have a knob 91a1, a body 91a2, and a flange 91a3. The knob 91a1 may be, for example, disk-shaped. The body 91a2 may be, for example, cylindrical, and provided on one side of the knob 91a1. The flange 91a3 is provided on the end of the body 91a2 opposite to the knob 91a1 side. The diameters of the knob 91a1 and the flange 91a3 are larger than the diameter of the body 91a2.
The biasing member 91b may be provided inside the body portion 91a2. The biasing member 91b may be, for example, a compression spring.

When the brake 7 is not kept in the released state, i.e., in normal use, the stop button 91a protrudes outside the cover 92 due to the biasing member 91b, as shown in FIG. 13(a).

13B, when the brake 7 is to be kept in the released state, the knob 91a1 is pressed, for example, to cause the body portion 91a2 to protrude into the cover 92. Then, the knob 91a1 is rotated to hold the body portion 91a2 by a holding mechanism (not shown).
11 and 13(b), if the body 91a2 protrudes into the cover 92, the rib 81c1 on the transmission lever 81c comes into contact with the body 91a2, preventing the transmission lever 81c from rotating. Therefore, the brake 7 can be maintained in an unbraked state.
The body 91a2 protruding into the cover 92 may be held by the transmission lever 81c (rib 81c1) by utilizing the friction between the rib 81c1 and the body 91a2. Also, as shown in Fig. 13(b), the flange 91a3 provided on the body 91a2 protruding into the cover 92 may be hooked onto the side of the rib 81c1. In this way, the above-mentioned holding mechanism can be omitted.

After that, if it is not desired to maintain the brake 7 in the released state, the knob 91a1 is rotated in the opposite direction to release the body 91a2 from the holding mechanism (not shown). The stop button 91a then protrudes outward from the cover 92 due to the biasing member 91b. This allows the transmission lever 81c to rotate, and the brake 7 enters the braking state.

FIG. 14 is a schematic perspective view illustrating a lock portion 19 according to another embodiment.
15A and 15B are schematic cross-sectional views illustrating the function of the stopper 191.
As shown in FIGS. 14 to 15B, the lock portion 19 can be provided with a stopper 191 and a cover 192.
The cover 192 covers the portion of the shaft 81b where the transmission lever 81c is provided. A cylindrical guide 192a is provided on the side surface of the cover 192.

The stopper 191 may be provided with a stop button 191a and a biasing member 191b.
The stop button 191a has a knob 191a1 and a pin 191a2. The knob 191a1 is, for example, cylindrical with one end closed. The knob 191a1 is attached to a guide 192a provided on the cover 192. The knob 191a1 is movable along the guide 192a. The pin 191a2 is movably provided inside the guide 192a. One end of the pin 191a2 is attached to an end face of the knob 191a1.

The biasing member 191b is provided between the end of the guide 192a and the end face of the knob 191a1. The biasing member 191b may be, for example, a compression spring.

When the brake 7 is not kept in the released state, i.e., in normal use, the stop button 191a protrudes outside the cover 92 due to the biasing member 191b, as shown in FIG. 15(a).

15B, when the brake 7 is to be kept in the released state, the knob 191a1 is pressed, for example, to cause the pin 191a2 to protrude into the cover 192. Then, the knob 191a1 is rotated to hold the knob 191a1 by a holding mechanism (not shown).
The pin 191a2 protruding into the cover 92 may be held by the transmission lever 81c (rib 81c1) by utilizing the frictional force between the rib 81c1 and the pin 191a2. Also, as shown in Fig. 15(b), a flange provided at the tip of the pin 191a2 protruding into the cover 92 may be hooked onto the side of the rib 81c1. In this way, the above-mentioned holding mechanism can be omitted.

When the pin 191a2 protrudes inside the cover 192, as shown in FIG. 15(b), the rib 81c1 on the transmission lever 81c comes into contact with the pin 191a2, preventing the transmission lever 81c from rotating. This allows the brake 7 to maintain its released state. If it is desired not to maintain the brake 7 in its released state after that, the knob 191a1 is rotated in the opposite direction to release the knob 191a1 from the holding mechanism (not shown). The stop button 191a then protrudes outside the cover 192 due to the biasing member 191b. This allows the transmission lever 81c to rotate, and the brake 7 to enter a braking state.

Although the embodiments have been described above, the present invention is not limited to these descriptions.
Any modifications to the above-described embodiments made by those skilled in the art are also encompassed within the scope of the present invention as long as they incorporate the features of the present invention.
Furthermore, the elements of each of the above-described embodiments can be combined to the greatest extent possible, and combinations of these are also included within the scope of the present invention as long as they include the features of the present invention.

1. A movable table,
2 top plates,
3 frames,
4 pillars,
41 outer cylinder,
42 inner cylinder,
5 legs,
6 casters,
7 brakes,
71 bracket,
72 brake pads,
73 fixed axis,
74 biasing member,
8 Brake operation unit,
81 Operation unit,
81a operating lever,
82 Conduction lever,
83 Conductive part,
83a outer shaft,
83b inner shaft,
83c Guide,
84 Conduction lever,
85 Cushioning member,
9 Lock section,
19 Lock section

Claims (6)

A frame,
A top plate provided on the frame;
A pair of support columns provided on the frame on the opposite side to the side on which the top plate is provided;
legs provided on the lower surface of each of the supports;
A plurality of casters provided on the legs;
At least one brake provided on the leg;
A brake operating unit that releases the brake from a braking state;
Equipped with
The support is extendable and retractable.
The legs are provided on each of the pair of columns so as to be substantially parallel to each other,
The brake is
A fixed shaft provided on the leg;
A brake pad rotatably provided around the fixed shaft;
A biasing member that biases the brake pad in a direction away from the leg;
having
The brake operation unit includes:
An operating lever provided on the frame side;
a transmission part that extends inside the support and transmits a force from the operating lever to the brake side;
having
The conductive portion is
A cylindrical outer shaft;
an inner shaft provided inside the outer shaft;
a guide provided at an end of the inner shaft, the guide including a resin, and at least a portion of the guide being capable of contacting an inner wall of the outer shaft;
A mobile table having The movable table according to claim 1, wherein the braking force of the brake is generated by at least a portion of the brake pad coming into contact with the floor by the biasing member. The brake further includes a bracket rotatably mounted on the fixed shaft,
The brake pad is provided on an end surface of the bracket,
The biasing member biases the brake pad via the bracket,
3. The movable table according to claim 1, wherein, in a plan view, the fixed axis is inclined with respect to a direction perpendicular to a direction in which the legs extend. The brake is provided in a pair,
4. The movable table according to claim 1, wherein the inclination direction of the fixed shaft of one of the brakes is opposite to the inclination direction of the fixed shaft of the other of the brakes. 5. The movable table according to claim 1, further comprising a locking portion that maintains a state in which the brake is released by the brake operating portion. A movable table according to any one of claims 1 to 5, wherein the following formula is satisfied when the angle between a direction perpendicular to the direction in which the legs extend and a center line of the fixed shaft is θ:
20°≦θ＜45°

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