JP6110203B2 - desk - Google Patents

Description

  The present invention relates to a desk provided with casters on legs that support a top board.

  2. Description of the Related Art Conventionally, a desk having a caster that can be turned on a leg portion of a desk has been used. By providing the caster, the desk can be easily moved, but the desk may move when sitting. Therefore, there is a type in which a stopper is provided on the caster, and the movement of the desk is restricted by operating the stopper to lock the caster (see Patent Document 1). In addition, there is a desk in which the top plate is configured to be rotatable and a link mechanism is provided so that the casters are separated from the floor surface when the top plate is leveled (see Patent Document 2).

JP-A-10-71023 JP 11-318572 A

  In the desks of Patent Documents 1 and 2, in order to switch whether or not the desk can be moved, it is necessary to operate a stopper itself for unlocking the casters and a top board on which leg ends and links are formed. Therefore, for example, when it is necessary to move the desk a little, it is necessary to operate the stopper, and it is necessary to operate the stopper to lock the caster even after the movement, and these operations are troublesome.

  An object of the present invention is to propose a desk that can suppress unexpected movement when seated.

  The invention according to claim 1, which has been made in order to solve the above-described problem, is a desk provided with legs that support the top plate. The leg has a set of moving legs and a set of regulating legs. The moving legs are provided at two positions spaced apart. The restricting legs are provided at two positions spaced in the crossing direction intersecting with the straight line passing through the pair of moving legs and spaced along the direction of the straight line.

  The movable leg described above is provided with a universal caster at the lower end that can turn around a vertical rotation axis. Further, the above-described regulation leg is disposed on the seating position side, and a fixed caster whose rotation direction is fixed in the crossing direction is provided at the lower end.

  The desk configured in this manner can be moved in the above-described crossing direction by four casters, and swivel so that the moving leg side moves in the above-described linear direction (the direction in which the moving legs are arranged) around the regulating leg side. it can. Since the fixed casters for the regulation legs provided on the seating position side are fixed in the crossing direction, the direction in which the desk moves even if the seated person touches the seating position side part of the top plate or the regulation legs. Limited to crossing direction. Therefore, it can suppress that a desk moves unexpectedly in the direction of the straight line mentioned above at the time of sitting.

  In addition, the swivel caster moves relative to the desk by turning, but the position of the fixed caster does not move like the free caster. Therefore, the contact position with the floor surface does not change to the front side. If the contact position moves to the front side, the position of the fulcrum that supports the desk with respect to the center of gravity of the desk moves forward, so that the desk tends to fall backward. Since there are many scenes where a seated person applies a load to the end of the desk on the side of the seating position with a hand or the like, there is a risk that the desk will fall over in such a configuration where the contact position moves in this way, but the desk of the present invention is a fulcrum Such a risk can be reduced because the position of the lens does not change.

  The desk according to claim 2 is the desk according to claim 1, wherein the regulation leg has a bar-like shape extending in the vertical direction, and the lower end of the regulation leg is bent in the direction in which the moving leg is located and extending downward. And an extension part extending in the direction in which the movable leg is positioned from the tip of the bent part, and further comprising a support part for supporting the rotating shaft of the fixed caster, the support part extending It contacts the lower surface of a part and the lower surface of a bending part.

  Since the support portion configured in this manner is in contact with each of the extension portion and the lower surface of the bending portion having different angles, the support portion is positioned when receiving a load from the outside such as when the top plate or the leg portion is pressed. It is hard to slip off and is convenient. In addition, when the support part is configured to be locked or sandwiched with respect to the extension part and the bent part, the positional deviation can be suppressed to a higher degree.

  The desk according to claim 3 is the desk according to claim 1, wherein the regulating leg has a bar-like shape extending in the up-down direction, and the lower end of the regulating leg is bent in the direction in which the moving leg is located and extending downward. And an extended portion extending in the direction in which the movable leg is positioned from the tip of the bent portion, and at least a part of the rotation axis of the fixed caster is a space below the bent portion. And it arrange | positions so that it may be located above the lower end of an extension part, It is characterized by the above-mentioned.

In such a desk, since the rotation axis of the fixed caster can be arranged in the space below the bent portion, it is not necessary to form a large recess in the leg when the fixed caster is attached.
Conventionally, in a leg having a leg portion extending along the floor surface, when the fixed caster is to be arranged at the lower end thereof, the leg portion is not floored unless the fixed caster is embedded by providing a recess or a notch in the leg portion. It would be greatly lifted from the surface, which was not preferable in terms of comfort and beauty of the seated person. For this reason, a recess or notch is provided and a caster is disposed therein. However, in that case, the manufacturing cost increases and the strength of the leg portion decreases, which may not be preferable.

  However, with the above desk, the rotation axis of the fixed caster can be arranged without providing a large recess, so that problems such as a decrease in leg strength and an increase in manufacturing cost can be suppressed while suppressing the lifting of the extension. it can.

  Moreover, in the said desk, compared with the case where a fixed type caster is simply attached under an extension part, the length which a fixed type caster protrudes below from an extension part can also be reduced. Therefore, when the desk is configured to be stackable, the effect of the fixed caster protruding downward can be reduced, and the vertical pitch can be reduced.

  The regulating leg can be formed of, for example, a metal pipe. At that time, the bent portion and the extended portion may be formed by bending a metal pipe, or may be formed by welding a plurality of metal pipes.

It is a perspective view which shows the desk of an Example. It is a figure which shows the desk of an Example, (A) is a front view, (B) is a right view, (C) is a left view, (D) is a rear view, E) is a plan view, and (F) is a bottom view. It is an enlarged view below a leg part, (A) is a right view, (B) is a front view, (C), (D) is a left view. (A) is the right view which expanded the lower part of the leg part, (B) is BB sectional drawing of FIG. 4 (A), (C) is AA sectional drawing of FIG. 2 (A). It is a figure which shows a rear leg lower end among these. It is a figure which shows a support part, Comprising: (A) is a right view, (B) is a rear view, (C) is a front view, (D) is a top view, (E) is It is a bottom view. It is a figure explaining stacking of a desk, (A) is a top view which omitted and saw through a part, (B) is a DD sectional view to a lower desk of Drawing 6 (C), (C) is CC sectional drawing of FIG. 6 (A). It is the top view which abbreviate | omitted and was seen through partially explaining the connection of a desk.

Embodiments of the present invention will be described below with reference to the drawings.
[Example]
(1) Overall Configuration As shown in FIGS. 1 and 2 (A) to 2 (F), the desk 1 of this embodiment includes a top plate 11 and a pair of legs that support the top plate 11 on the left and right sides. A portion 13L and a leg portion 13R, and a curtain plate 15 provided in a hanging shape on the front side of the top plate 11 are provided.

  In addition, the desk of a present Example assumes a user's seating position and the back of the top plate 11 becomes a seating side. The left-right direction is the left-right direction with the user as a reference when the user is seated toward the desk 1. Therefore, the left side of the desk 1 is shown in the right side view of FIG. 2 (B), and the right side of the desk 1 is shown in the left side view of FIG. 2 (C).

The top plate 11 is a substantially rectangular shape extending in the front-rear direction and the left-right direction, and is a plate-like member having round corners.
The leg portion 13L and the leg portion 13R are formed by bending and welding a metal pipe having a rod-like appearance. The leg portion 13L and the leg portion 13R have shapes that are almost symmetrical, but some of the shapes are different. Therefore, first, the leg portion 13L will be described, and the leg portion 13R will be described at points different from the leg portion 13L.

The leg portion 13L includes a front leg 21L and a rear leg 23L that are spaced apart from each other in the front-rear direction, and a connecting portion 25L that connects the front leg 21L and the rear leg 23L.
The front leg 21L is formed by welding an upper column 27L whose lower end is connected to the connecting portion 25L and a lower column 29L disposed adjacent to the upper column 27L. Both the upper pillar 27L and the lower pillar 29L extend in the vertical direction, and the lower pillar 29L is connected so as to be arranged on the right side of the upper pillar 27L.

At the lower end of the front leg 21L (lower column 29L), a swivel caster 31 is provided that can turn around a vertical rotation axis and can freely change the rotation direction.
At the lower end of the rear leg 23L, there is provided a fixed caster 35 whose rotation direction is fixed in the front-rear direction, which rotates about a rotation axis fixed in the left-right direction.

  The leg portion 13R includes a front leg 21R, a rear leg 23R, a connecting portion 25R, an upper column 27R, and a lower column 29R. , Upper pillar 27L, lower pillar 29L.

  The front legs 21L and the front legs 21R are arranged at two places with a space therebetween. Further, the rear leg 23L and the rear leg 23R are arranged at two positions spaced apart from each other. The rear leg 23R is inclined forward in comparison with the rear leg 23L. The shape of the connecting portion 25R is slightly different from that of the connecting portion 25L, but will be described in detail later.

  Between the pair of left and right legs 13L and 13R, an upper leg connecting rod 39 (see FIG. 2D) that connects the upper pillars 27L and 27R and a lower leg that connects the upper ends of the lower pillars 29L and 29R. A connecting rod 41 is provided. The lower leg connecting rod 41 is formed integrally with the lower pillars 29L and 29R.

  The upper end of the front leg 21L and the upper end of the front leg 21R are connected by a first horizontal portion 45 (see FIGS. 6A and 6C). Further, the upper end of the rear leg 23L and the upper end of the rear leg 23R are connected by a second horizontal portion 47. The top plate 11 is supported by the first horizontal portion 45 and the second horizontal portion 47.

  As shown in FIGS. 2A to 2F, the front legs 21L and 21R are all provided in the space below the top plate 11, and the rear legs 23L and 23R are both the top plate 11. It is provided in the position which left | separated to the outer side of the left-right direction from lower space.

  The curtain plate 15 is arranged at the front end portion of the top plate 11 so that the main surface of the curtain plate 15 and the front end of the top plate 11 are substantially aligned. Further, the curtain plate 15 is arranged so that the gap between the top plate 11 and the bottom plate 11 is reduced so that a gap of a height that allows a finger or the like to be substantially inserted does not occur between the top plate 11 and the curtain plate 15. Yes.

A handle 51 is provided on the upper left and right center of the curtain plate 15. It is possible to carry the desk by hooking a finger or the like on the handle 51 and applying a load to the front side of the desk 1.
(2) Configuration of Leg Lower End First, the configuration from the connecting portions of the leg portions 13L and 13R to the front legs will be described with reference to FIGS. 3 (A) to 3 (D).

  As shown in FIGS. 3A and 3B, the connecting portion 25L of the leg portion 13L includes a first portion 61L extending along the floor surface from the rear leg 23L toward the front leg 21L, and the first portion 61L. It has a second portion 63L that is bent from the extended tip and extends forward and upward and to the right, and connects the front leg 21L (upper column 27L) and the first portion 61L.

  The second portion 63L passes the outside of the existence region 65 where the universal caster 31 can exist, and connects the front leg 21L and the extended tip of the first portion 61L. Since the universal caster 31 can swivel about the vertical rotation axis, the existence area 65 where the universal caster 31 can be located is an area where the universal caster 31 can be located.

The swivel rotation axis of the universal caster 31 is arranged on the same straight line as the central axis of the front leg 21L (lower column 29L) and the front leg 21R (lower column 29R).
As shown in FIG. 3C, the connecting portion 25R of the leg portion 13R also includes a first portion 61R and a second portion 63R, as in the connecting portion 25L, and the second portion 63R is located outside the existence region 65. Pass through. However, as shown in FIG. 3D, the second portion 63R is located above the second portion 63L as viewed from the left-right direction. Further, as compared with the second portion 63L, the bent position connected to the first portion 61R is the rear, and the bent position connected to the upper column 27R is the upper.

  Next, the structure from the connecting part in the leg parts 13L and 13R to the rear leg will be described with reference to FIGS. 4 (A) to 4 (C). Since the shape of this portion is symmetrical except that the rear leg 23R is slightly inclined forward, only the leg portion 13L will be described.

  As shown in FIG. 4A, the rear leg 23L extends in the vertical direction. The lower end of the rear leg 23L is formed as a bent portion 33 extending forward and downward, and the first portion 61L of the connecting portion 25L described above extends in the direction in which the front leg 21L is positioned from the tip of the bent portion 33. ing.

  The rotation shaft 35a extending in the left-right direction in the fixed caster 35 is disposed such that its center 35b is a space below the bent portion 33 and is located in a region 33a above the lower end of the first portion 61L. .

  Further, as shown in FIGS. 5 (A) to 5 (E), the support portion 37 that supports the rotating shaft 35a of the fixed caster 35 includes a first region 37a that contacts the lower surface of the first portion 61L, and a bent portion. A second region 37b in contact with the lower surface of the portion 33. Note that FIGS. 5A to 5E show a part of the structure in a transparent drawing.

  As shown in FIGS. 4B and 4C, the first region 37a and the second region 37b can be in close contact with the connecting portion 25L (first portion 61L) and the bent portion 33 made of a metal pipe. It is a curved shape that matches the curved surface of the metal pipe surface, and is formed in a shape that sandwiches the metal pipe. The support part 37 is fixed to the connecting part 25L by screwing from below. In FIG. 4B and FIG. 4C, the metal pipe portion is filled to facilitate understanding, but it is actually a hollow shape.

  The first portion 61L and the first portion 61R extend along the floor surface as described above, but the upper end of the main portion, that is, the portion located on the upper side of the side surface of the metal pipe is the free caster 31. The upper end of the wheel and the upper end of the wheel of the fixed caster 35 are arranged close to the floor so as to be lower in position.

The support portion 37 of this embodiment functions as a general leg end when no wheel is attached. Therefore, when unnecessary, the wheel can be removed and used.
(3) Desk stacking and ganging function The desk 1 can be stacked. FIGS. 6A and 6C show a state in which two desks are stacked. FIG. 6B shows a diagram showing the lower side of the top plate 11 of the desk 1. A part of the configuration is omitted for easy understanding.

  As shown in FIG. 6B, the desk 1 has the rear legs 23L and 23R arranged on the outer side in the left-right direction with respect to the top plate 11 when viewed from above, so that the top plate 11 is stacked and stored in a stack. Is possible. The front legs 21L and 21R are arranged below the top plate 11, but since the position is near the front end of the top plate 11, the effect on the width of shifting the top plates 11 of the upper and lower desks 1 when stacking them is small.

  In the state of being stacked and housed in this way, as shown in FIG. 6C, a vertical space is formed between the connecting portions 25R of the two desks 1. As shown in FIG. 4 and FIG. 4A, the fixed caster 35 is configured to fit within this interval.

  The desk 1 can be ganged to the left and right to contact the top plate 11. FIG. 7 shows a state where two desks 1 are ganged. A part of the configuration is omitted for easy understanding.

  As described above, the desk 1 has the rear legs 23L and 23R arranged on the outer side in the left-right direction with respect to the top board 11 in a top view, but the rear legs 23L and the rear legs 23R even if the top board 11 is arranged adjacent to each other in the left-right direction. Do not touch.

  When the connection location of the two desks 1 is seen, the left end side of the second horizontal portion 47 is bent backward, and the rear leg 23L extends vertically downward from the left end portion. On the other hand, the right end portion side of the second lateral portion 47 is not bent, and the rear leg 23R extends downward and inclined downward from the right end portion. As a result, the rear leg 23 </ b> R of the left desk 1 is positioned so as to pass under the second horizontal portion 47 in the right desk 1, and contact of each leg is avoided.

  Further, as described above, since the second portion 63R is located above the second portion 63L as viewed from the left-right direction, the second portion 63R has a positional relationship in which the second portion 63R passes over the second portion 63L. Is also avoided.

Thus, the desk 1 of the present embodiment can achieve ganging and stacking at the same time.
(4) Effect The desk 1 of the present embodiment can move freely in the front-rear direction, but the movement is restricted in the left-right direction because the rotation direction of the fixed caster 35 is fixed in the front-rear direction. For example, when a horizontal load is applied to the front of the top plate 11, the desk 1 turns around the fixed caster 35 side even with a relatively small force, but a horizontal load is applied to the rear of the top plate 11. When applied, it is difficult to move with a small force.

Therefore, the desk 1 of the present embodiment is less likely to move in the left-right direction even if the seated person touches the back (seat position side) of the desk 1, and can suppress the desk from moving unexpectedly in the left-right direction when sitting. .
Further, since the relative position of the fixed caster 35 on the desk 1 does not move like the free caster 31, the contact position with the floor surface is the front side as in the case where the free caster 31 is temporarily attached to the rear leg. When the load is applied to the back of the top plate 11, the rear caster 31 can easily fall down, and the free caster 31 faces the inner side in the left-right direction to contact the seated person's feet or chair legs. It becomes easy to do and can suppress impairing comfort.

  Further, the desk 1 of the present embodiment can arrange the rotating shaft 35a of the fixed caster 35 in the space below the bent portion 33, so that the fixed caster 35 is attached while suppressing the floating of the connecting portions 25L and 25R. It is not necessary to form large concave portions in the connecting portions 25L and 25R, and it is possible to suppress problems such as a decrease in strength of the leg portions and an increase in manufacturing cost while suppressing the floating of the connecting portions 25L and 25R.

  In addition, the length of the fixed caster 35 protruding downward from the connecting portions 25L and 25R can be reduced. For this reason, when the desk 1 is stacked, the fixed casters 35 can be arranged at intervals between the connecting portions, and the vertical pitch is not increased, which is convenient.

  Further, the support portion 37 is in contact with the lower surfaces of both the connecting portion 25L and the bent portion 33 extending at different angles, and is formed into a curved shape in accordance with the surface shape thereof and sandwiches them. Therefore, it is possible to highly suppress the positional deviation with respect to the connecting portion 25L and the bent portion 33, particularly the positional deviation in the circumferential direction of the metal pipe.

  The front legs 21L and 21R are an example of a set of moving legs in the present invention, the rear legs 23L and 23R are an example of a set of regulating legs in the present invention, and the first portions 61L and 61R are extended in the present invention. It is an example of an exit part. Moreover, the front-back direction is an example of the cross direction in this invention, and the left-right direction is an example of the direction of the straight line in this invention.

[Modification]
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and it goes without saying that various forms can be taken as long as they belong to the technical scope of the present invention.

  For example, in the above-described embodiment, the configuration in which the leg portions are formed as the leg portions 13L and 13R using a cylindrical metal pipe is illustrated, but the leg portions 13L and 13R may be formed of a material having a shape and material other than those described above. In the case where a metal pipe is used, the bent portion 33 can be formed by bending, but may be joined by welding or the like.

  Moreover, in the said Example, although the center 35b of the rotating shaft 35a of the fixed caster 35 was illustrated in the area | region 33a, if at least one part of the rotating shaft 35a is located in the said area | region 33a, a rotating shaft It is possible to suppress the floating of the connecting portions 25L and 25R while suppressing the formation of large concave portions in the connecting portions 25L and 25R in order to arrange 35a.

DESCRIPTION OF SYMBOLS 1 ... Desk, 11 ... Top plate, 13L, 13R ... Leg part, 15 ... Curtain board, 21L, 21R ... Front leg, 23L, 23R ... Rear leg, 25L, 25R ... Connection part, 27L, 27R ... Upper pillar, 29L, 29R ... Lower pillar, 31 ... Swivel caster, 33 ... Bending portion, 33a ... Region, 35 ... Fixed caster, 35a ... Rotating shaft, 35b ... Center, 37 ... Supporting portion, 37a ... First region, 37b ... Second Area 39: Upper leg connecting rod 41: Lower leg connecting rod 45: First horizontal portion 47: Second horizontal portion 51: Hand hook portion 61L, 61R First portion 65: Existing region

Claims (3)

A desk with legs to support the top board,
The legs are
A set of mobile legs provided at two spaced locations;
A pair of regulating legs provided at two positions spaced in the crossing direction intersecting the straight line passing through the pair of moving legs and spaced along the direction of the straight line; Have
The movable leg is provided at its lower end with a universal caster that can turn about a vertical rotation axis.
The desk is characterized in that the regulation leg is arranged on the seating position side, and a fixed caster whose rotation direction is fixed in the crossing direction is provided at the lower end. The regulation leg has a rod-like shape extending in the vertical direction,
The lower end of the regulation leg is provided with a bent portion that extends downward in the direction in which the movable leg is positioned, and an extending portion that extends in the direction in which the movable leg is positioned from the tip of the bent portion,
The desk further includes a support portion that supports a rotating shaft of the fixed caster,
The desk according to claim 1, wherein the support portion is in contact with a lower surface of the extending portion and a lower surface of the bent portion. The regulation leg has a rod-like shape extending in the vertical direction,
The lower end of the regulation leg is provided with a bent portion that extends downward in the direction in which the movable leg is positioned, and an extending portion that extends in the direction in which the movable leg is positioned from the tip of the bent portion,
The fixed caster is arranged such that at least a part of a rotating shaft thereof is a space below the bent portion and is located above a lower end of the extending portion. The desk described in.