JPH0728774B2 - Lifting mechanism and equipment storage desk having the lifting mechanism - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevating mechanism for elevating and lowering a support plate for supporting articles, and an OA device or the like arranged on the top plate by elevating and lowering the top plate by this elevating mechanism. The present invention relates to a device storage desk that is stored inside a desk body when not in use and can be pulled out to the outside when used.

[0002]

2. Description of the Related Art Conventionally, a lot of equipment storage desks have been proposed in which OA equipments, OHPs (overhead projectors), etc. are stored inside when not in use and can be pulled out to the outside when in use (actual development 55 -34429, 62
-111436 gazette etc.). In these desks, a box-shaped desk body is provided with a storage space with an open upper side, and a top plate that can be raised and lowered by an appropriate means is stored in the storage space, and the top plate is moved up and down to move the top plate. Storage of equipment placed on
Take out. As the top plate lifting mechanism, a large guide rail is arranged vertically in the storage space, and the sliding member is manually slid along the guide rail to lift the top plate mounted on the sliding member. Thing (actual development 55-34429
No.) or a screw shaft arranged vertically in the storage space, and a nut plate screwed onto the screw shaft is attached to a top plate, and the screw shaft is rotated forward and backward by a motor. −111436
No.) etc.

[0003]

By the way, in the desk of the type that raises and lowers the top plate as described above, in order to ensure a smooth raising and lowering operation of the top plate, or because of aesthetic problems, the wiring of the equipment and the power supply A cord or the like is drawn into a space below the top plate from a hole provided in the top plate, and is led to the outside from here through a hole provided in the back plate of the desk body.

However, in any of the above-described lifting mechanisms, the constituent elements such as the guide rail, the sliding member, the screw shaft, and the nut piece are exposed in the accommodating space. For this reason, when the top plate is moved up and down, wiring or the like is caught in the sliding contact portion or the threaded portion between the guide rail and the sliding member or the screw shaft and the nut piece, and the movement of the top plate is hindered. There is a risk that the wiring may be broken.

On the other hand, as a means for avoiding such a problem, it is considered that the guide rail and the screw shaft are housed in the side plate of the desk body. However, in order to accommodate the screw shaft and the large-sized guide rail, it is necessary to provide a relatively large storage space in the side plate, and an increase in the thickness of the side plate cannot be avoided. Therefore, the space occupied by the desk becomes large and the space cannot be effectively used. Also this
For desks that elevate and lower the top plate, the equipment should not be
If the weight balance of the top plate is bad,
Stable lifting of the top plate is an important issue.

Therefore, according to the present invention, when the top plate is moved up and down, the wiring is not caught, the space can be effectively used, and the weight balance on the top plate is not good.
And an elevating mechanism that can stably elevate the top plate and
An object is to provide a device storage desk having the lifting mechanism .

[0007]

[Means for Solving the Problems] To achieve the above object,
The device of the present invention is a mechanism for moving up and down a support plate that supports an article,

The hollow plate-shaped stationary structure and the base end are
Located in the internal space of the stop structure and extending in a substantially horizontal direction,
A support arm provided with a support portion for supporting the support plate,
An upper wheel body and a lower wheel body that are housed at the upper and lower positions of the internal space of the stationary structure and have a rotation axis parallel to the thickness direction of the stationary structure, and the forward and reverse directions with the output shaft protruding into the internal space of the stationary structure. A rotatable drive source, an output shaft of the drive source housed in the internal space of the stationary structure, a drive force transmission member stretched in a loop shape on the upper wheel body and the lower wheel body, and a support arm. Vertically and pivotally attached to the base end of
Direction and a direction perpendicular to the thickness direction of the stationary structure
It has a plurality of running wheels and is installed vertically inside the stationary structure.
On both sides in the thickness direction of the stationary structure and the outer peripheral surface of the traveling wheel.
A guide rail in surface contact with the base end of the support arm
The portion is connected to a driving force transmission member between the upper and lower wheels.

This lifting mechanism can be applied to a desk for storing equipment.
Both are possible. That is, a front structure having a hollow plate shape,
Position the base end in the internal space of the front structure and
A support arm that extends and has a support part that supports the top plate
And the upper and lower positions of the inner space of the front structure.
It is housed and has a rotation axis parallel to the thickness direction of the front structure.
Inner space of the front structure with the upper and lower wheels and the output shaft
Forward and reverse rotatable drive source projected to the front and the front structure
An output shaft of the drive source housed in the internal space, and
Drive stretched in a loop on the upper and lower wheels
Vertically and pivotally attached to the force transmitting member and the base end of the support arm.
Direction that is horizontal and orthogonal to the thickness direction of the front structure
Inner space of the front structure
The thickness of the outer peripheral surface of the traveling wheel and the front structure.
Guide rails that make surface contact on both sides of
Connect the base end of the frame to the driving force transmission member between the upper and lower wheels.
To conclude.

The driving force transmitting member may be a chain or a tie.
A ming belt or wire can be used.

[0011]

[0012]

[0013]

[Operation] When the drive source is rotated in the forward and reverse directions, the output shaft of the drive source,
The driving force transmitting member stretched in a loop shape on the upper and lower wheels also rotates in the internal space of the stationary structure. This forward and reverse rotation
Connected to the driving force transmission member between the upper and lower wheels.
The support arm that is lifted moves up and down.
The support plate can be raised and lowered. When traveling up and down
The wheels roll on guide rails and are guided vertically
With this, the support plate can be stably moved up and down even under high load.
Wear. Especially the weight variation in the front-back direction (thickness direction of the stationary structure)
If the resistance is poor, for example, place a heavy device on the end of the support plate.
Even when installed, multiple traveling wheels should be arranged vertically.
Guide the outer peripheral surface of each traveling wheel on both sides in the thickness direction of the front structure
Since it is in surface contact with the rail, the traveling direction of the traveling wheels is
It can be held securely vertically, which ensures
It is possible to secure a fixed lifting operation.

When the driving force transmitting member is composed of a chain, a timing belt or a wire, the width of the internal space of the stationary structure for accommodating the driving member needs to be slightly larger than the width of the chain or the like. Therefore, the required thickness of the stationary structure is smaller than that in the case where the conventional lifting mechanism is housed.

Further, when the elevating mechanism is applied as an elevating means for the top plate of the equipment storage desk, since each component of the elevating mechanism is housed in the internal space of the front structure, it is drawn into the space below the top plate. Wiring will not be caught in the lifting mechanism when the top plate is lifted. Further, similarly to the above, the required thickness of the front structure that houses the elevating mechanism is also small, so that a device storage desk that is smaller than the conventional product can be provided.

[0016]

Embodiments of the present invention will be described below with reference to FIGS.

FIG. 1 is a perspective view showing the overall structure of a device storage desk according to the present invention. As you can see, this desk
A desk body (7) formed by combining a front structure (1) having a double structure, a back plate (3), and a pair of side plates (5) (5) in a rectangular tube shape, and the inside of the desk body (7). It is composed of a top plate (9) housed in the space. The top plate (9) is driven by an elevating mechanism (11) housed inside the front structure (1) to move up and down.

As shown in FIG. 2, the front structure (1) is constructed by stacking an outer plate (13), a frame (15) and an inner plate (17). The frame (15) has a rectangular frame shape, and guide rails (21) (21) (21) (21) having a U-shaped cross section for engaging outer supporting edges (45) of both short sides of the four sides with a support arm (45) described later. ) Is bent and formed with the openings facing each other, and upper support portions (23) and lower support portions (25), which are also U-shaped in section, are bent and formed with the openings facing each other on the outer edges of both long sides. Has been done. A sub-frame (27) is installed between both short sides of the frame (15) so as to be appropriately separated from the lower long side. In the sub-frame (27), a storage portion (29) having a U-shaped cross section is formed in series along the longitudinal direction with the opening facing upward.

On the frame (15) having such a shape, upper and lower wheels (29), (29), (31) and (31) [for example, using a sprocket], a driving source (33), a driving force. An elevating mechanism (11) including transmission members (35) (35) [for example, using a chain] is provided. Hereinafter, the configuration of the lifting mechanism (11) will be described in detail.

At the four corners of the frame (15), the front structure is
Fixed axis (axis) arranged parallel to the thickness direction of the body (37a)
(37a), (37b) and (37b) are projected. Of the fixed shafts (37a) (37a), (37b) and (37b), the upper sprocket (29) (29) is movably mounted on a pair of fixed shafts (37a) (37a) provided above, The lower sprockets (31) and (31) are movably mounted on a pair of fixed shafts (37b) and (37b) provided below.

At the center of the lower long side of the frame (15), one end is fixed to the lower support part (25) and the other end is fixed to the sub-frame (27). A drive source (33) is arranged via a drive source support (39). Drive source (3
3) is composed of a forward / reverse rotatable motor and a speed reducer, and its output shaft (not shown) projects inward of the drive source support (39). A pair of drive sprockets (41, 41) is connected to the output shaft via a gear train (not shown).

This drive sprocket (41) (41), upper sprocket (29) (29) and lower sprocket (3)
1) (31) includes a pair of chains (35) (3
5) is meshed and stretched in a loop and symmetrically. As a result, when the drive source (33) is normally and reversely rotated, the left and right chains (35) (35) are synchronously rotated in forward and reverse directions. At this time,
The arrangement of the gear trains (not shown) is selected in advance so that the left and right chains (35, 35) rotate in opposite directions.

Tension sprockets (43) (43) slidably movable in the vertical direction are arranged on both sides of the drive source support (39). The tension of the chain (35) is adjusted to an appropriate value by sliding the tension sprocket (43) in the vertical direction.

Reference numerals (45) and (45) denote support arms that connect the chains (35) and (35) to the top plate (9). As shown in FIG. 3, the support arm (45) is formed of a thin metal plate, and has two traveling wheels (49) at its base end with a thick rectangular support member (47) interposed. ) Is vertically and pivotally attached. The axis of this traveling wheel (49) is horizontal and frontal.
Oriented in a direction orthogonal to the thickness direction of the structure (1)
It In addition, a top plate support portion (51) formed by bending the edge in the horizontal direction is provided on the upper portion of the support arm (45).

As shown in FIG. 4, the support arm (45).
The traveling wheels (49) are fitted into guide rails (21) provided on both sides of the frame (15). At this time, the traveling vehicle
The outer peripheral surface of the ring (49) is on both sides in the thickness direction of the front structure (1).
It is in surface contact with the guide rail (21). In addition, a pin or the like is used between the upper and lower sprockets (29) (31) at the rear end of the support arm (45), that is, the base end of the surface opposite to the mounting surface of the support member (47). The chain (35) located at is attached. With this structure, the chain (35)
Left and right support arms (45) following the forward and reverse rotation of (35)
(45) interlocks and moves up and down in the same direction.

By mounting the outer plate (13) on the surface of the frame (15) and the inner plate (17) on the opposite surface, the front structure (1) shown in FIG. 5 is constructed. At this time, the lower end of the inner plate (17) is stored in the storage section (29) provided in the sub-frame (27), and the upper end is mounted on the upper support section (23) provided in the frame (15). It The guide rails (21) (21) and the end surface of the inner plate (17) should be as close as possible to each other with a gap that allows the support arms (45) (45) to move up and down in order to prevent the wires from being caught. Keep it.

The front body (1) described above is combined with the pair of side plates (5) (5) and the back plate (3) to form the desk body (7) and the top plate provided on the support arm (45). By mounting the top plate (9) on the support part (51),
The device storage desk shown in FIG. 1 is configured. In this desk, since the lifting mechanism (11) for the top plate (9) is housed in the internal space of the front structure (1), the wiring and power supply for the OA equipment (53), etc. arranged on the top plate (9). A cord or the like (which is drawn into the lower space from a hole (not shown) provided in the top plate (9)) is not caught in the elevating mechanism by the elevating operation of the top plate (9). In addition, the thickness of the front structure (1) is the thickness of the chain (35).
Since the width of the desk can be suppressed to be slightly larger than the width, the floor area occupied by the desk can be reduced.

In FIG. 4, the guide rail (21) is drawn thicker to improve the visibility of the drawing, but by further downsizing this guide rail (21), the chain ( The front structure (1) having a thickness slightly larger than the width of 35) can be provided.

By the way, the front structure (1) can also be used as an elevating mechanism for supporting plates for supporting articles, for example, shelf plates and bed floor plates. That is, if the front structure (1) shown in FIG. 5 is mounted on the wall surface of the house, it is possible to move up and down the shelf plate and the like with the same configuration. In this case, since the thickness of the front structure (1) is thin as described above, the aesthetic appearance of the wall surface is not impaired even after the front structure (1) is attached. Further, if the front structure (1) is embedded in the wall surface, further improvement in aesthetics can be achieved.

As the driving force transmission means (35) constituting the lifting mechanism (11), a timing belt or a wire can be used in addition to the above-mentioned chain. In this case, it is necessary to use pulleys as the upper and lower wheels (29) (31).

[0031]

As described above, according to the elevating mechanism of the present invention, the thickness of the stationary structure accommodating the elevating mechanism can be made thinner than that of the conventional product. Specifically, when a chain, a timing belt or a wire is used as the driving force transmission member, the thickness can be set to be slightly larger than the width of the chain or the like. Therefore, even when the stationary structure itself is mounted on the wall surface of the house, the aesthetic appearance of the wall surface is not impaired. Further, it is possible to easily embed the stationary structure in the wall surface to further improve the aesthetic appearance.

Further, when the elevating mechanism is stored in the internal space of the front structure of the equipment storage desk, the thickness of the front structure can be reduced, so that the desk can be used even if it has the same top plate area as the conventional product. The floor space occupied by itself can be further reduced, and the space can be effectively used. Further, since the elevating mechanism is housed in the front structure, the wirings drawn into the space below the top plate are not caught in the elevating mechanism when the top plate is moved up and down. Therefore, the ascending / descending operation of the top plate is stabilized, and problems such as disconnection of wirings do not occur. Well
Also, the top plate can be lifted and lowered stably even under high load.
(Because the traveling wheels and the guide rails make rolling contact),
Even if the weight balance in the front-rear direction is poor, multiple vehicles
The wheels are arranged vertically and the outer peripheral surface of each traveling wheel is a front structure.
Since it is in surface contact with the guide rail on both sides in the thickness direction of,
It is possible to keep the traveling direction of the traveling wheels vertically.
It is possible to ensure a stable lifting operation. Well
Also, extend the support arm horizontally and move the base end up and down.
Is connected to the driving force transmission member located between the wheels
The top plate can be lifted and lowered by the side of the lifting mechanism.
It is possible to secure a high lift range.

[Brief description of drawings]

FIG. 1 is a perspective view showing the overall configuration of a device storage desk according to the present invention.

FIG. 2 is a perspective view showing a structure of a frame.

FIG. 3 is a perspective view showing a structure of a support arm.

FIG. 4 is a cross-sectional view near the upper portion of a stationary structure or a front structure.

FIG. 5 is a perspective view showing an overall configuration of a stationary structure or a front structure.

[Explanation of symbols]

 1 Front structure 3 Rear plate 5 Side plate 7 Desk body 9 Top plate 11 Lifting mechanism 29 Upper sprocket 31 Lower sprocket 33 Drive source 35 Drive force transmission member

Claims (2)

[Claims] 1. A mechanism for raising and lowering a support plate for supporting an article, comprising a hollow plate-shaped stationary structure and a base end portion.
Located in the internal space of the stationary structure and extending in a substantially horizontal direction,
Support arm provided with a support portion for supporting the support plate on the upper portion
And an upper wheel body and a lower wheel body that are housed in the upper and lower positions of the internal space of the stationary structure and have axes parallel to the thickness direction of the stationary structure, and the output shaft that protrudes into the internal space of the stationary structure. reverse rotatable drive source, the output shaft of and the driving source is accommodated in the internal space of the stationary structure, and a tensioned driving force transmitting members in a loop to the upper wheel member and a lower ring member, the support Vertically and pivotally attached to the base end of the arm, horizontal
And has a pivot in a direction orthogonal to the thickness direction of the stationary structure.
Multiple running wheels and suspended inside the stationary structure.
On both sides in the thickness direction of the stationary structure and the outer peripheral surface of the traveling wheel.
A guide rail in surface contact with the base end of the support arm
Lifting mechanism, characterized in that the part is connected to the drive force transmitting member between the upper and lower wheel body. 2. A lifting mechanism for lifting a top plate is provided.
A device storage desk, which is a hollow plate-shaped front structure
And place the base end in the internal space of the front structure
A support that extends in the same direction and has a support part that supports the top plate at the top.
A holding arm, an upper wheel body and a lower wheel body that are housed at upper and lower positions of the internal space of the front structure and have axes parallel to the thickness direction of the front structure, and an output shaft inside the front structure. A forward and backward rotatable drive source protruding into the space, an output shaft of the drive source housed in the internal space of the front structure, and
A driving force transmission member stretched in a loop shape on the upper wheel body and the lower wheel body and vertically and pivotally attached to the base end portion of the support arm.
Direction that is horizontal and orthogonal to the thickness direction of the front structure
Inner space of the front structure
The thickness of the outer peripheral surface of the traveling wheel and the front structure.
Guide rails that are in surface contact on both sides.
A device storage desk characterized in that a base end portion of the frame is connected to a driving force transmission member between the upper and lower wheels.