JP2003019040A - Movable rack device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a movable rack device in which assemblability is improved and operation reliability is enhanced. SOLUTION: The movable rack device is constituted so as to block the traveling of a movable rack 10 by the operation of a lock member 40. The respective constituting members 60, 70, 80, 90 and 100 of a mechanism for unlocking for automatically unlocking the lock member 40 to a detached state at the time of an earthquake are made into a unit and constituted as an unlocking unit 50. The unlocking unit 50 is assembled to the movable rack 10 and an automatic unlocking function is imparted to the movable rack 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a movable rack device in which a movable rack is provided on a rail so that it can travel.

[0002]

2. Description of the Related Art Conventionally, a plurality of movable racks are provided on a rail laid on a floor so that the movable racks can travel freely, and the movable racks are appropriately moved so that books and the like can be taken in and out of a desired movable rack. There is a well-known moving rack device which is capable of saving space and achieving a high storage rate.

In such a moving rack device, a lock device is provided in order to prevent the rack from being moved carelessly, but an earthquake or the like occurs when the lock device prevents the rack from moving. When the floor surface shakes greatly, the moving rack also shakes greatly, and the stored items in the rack may drop or even the rack itself may tip over.

Therefore, when vibration due to an earthquake or the like is sensed, the lock by the lock device is automatically released, and the rack is moved according to the vibration to absorb the vibration energy and avoid the adverse effect of the vibration. Those with such a lock release mechanism are well known.

In such a moving rack, especially around the lock release mechanism, the structure becomes complicated, and it becomes difficult to assemble the lock release mechanism, and the operation reliability may be deteriorated. At present, there is a strong demand for improvement in assemblability and operational reliability.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a movable rack device capable of improving the assembling property and the operation reliability.

[0007]

In order to achieve the above object, the present invention comprises a movable rack adapted to travel by transmitting an operating force of an operating member to a wheel on a bottom surface by a power transmission mechanism. A lock member is provided so as to be disengageable with respect to the power transmission mechanism. When the lock member is engaged, the operation of the power transmission mechanism is blocked to prevent traveling of the moving rack, and when the lock member is disengaged, the power transmission mechanism is disconnected. A moving rack device configured to allow the operation of a transmission mechanism to allow the traveling of a moving rack, the unlocking being for unlocking the lock member in a disengaged state in a state of being engaged with the power transmission mechanism. A unit having a unit, the lock release unit is provided on the housing, a housing having a support plate, an oscillating body erected on the support plate so as to be swingable, and A slider that is slidable between a fixed retracted position and an advancing position; an urging means that is provided in the housing and that urges the slider in the advancing direction; and a slider that is provided in the housing and that has the slider. Slider holding means for holding the slider at the retracted position against the urging force of the urging means, and based on the oscillating motion of the oscillating body, the slider holding means releases the holding of the slider. The lock release unit is attached to the movable rack in correspondence with the lock member, and when the rocking body rocks due to an earthquake or the like, the slider holding means is rocked by the rocking of the rocking body. The slider is released from being held, the slider is urged to move forward, and the slider is moved to operate to move the slider. Member is disengaged from the power transmission mechanism, the running of the moving rack is summarized as made is configured to be allowed.

In the moving rack device of the present invention, the automatic unlocking component is unitized and the unlocking unit is incorporated to provide the automatic unlocking function. Therefore, unlike the case where the components for automatic lock release are individually assembled to the moving rack, the lock releasing mechanism can be easily incorporated in the moving rack.

Further, since the lock is released by linear movement such as sliding operation of the slider of the lock releasing unit, the operation reliability is improved as compared with the case where the rotary movement such as the lever system or the link system is used. You can

On the other hand, in the present invention, the oscillating body in the unlocking unit includes a weight body having a hemispherical lower end surface, and a connecting shaft provided at the lower end of the weight body so as to project downward. And an engaging plate provided at a lower end of the connecting shaft, wherein the connecting shaft is loosely fitted to the supporting plate of the housing with the lower end surface of the weight body placed on the supporting plate of the housing. It is preferable to adopt a configuration in which the oscillating body is swingably supported by the support plate by being disposed so as to penetrate therethrough.

That is, when this structure is adopted, no matter which direction the rocking body swings, the lower end surface of the hemispherical surface makes a rolling contact with the supporting plate of the housing without difficulty, so that the rocking body causes earthquakes in all directions. It can be detected accurately.

Further, in the present invention, it is desirable that the rocking member in the unlocking unit is constructed so as to automatically return to the standing state.

That is, in this case, the lock releasing unit can be easily returned to the initial state without performing a troublesome returning operation to the lock releasing unit, for example, only by performing the lock operation on the moving rack.

[0014]

1 is a perspective view showing a movable rack device according to an embodiment of the present invention. As shown in the figure, this moving rack device is installed on a floor surface as an installation surface,
A pair of rails (1) are laid, a fixed rack (5) fixedly attached to one end of the rail (1), and a plurality of movable racks (10) provided so as to be movable along the rails (1). ) And.

The moving rack (10) has a bottom wall (11),
It has a top wall (12) and both side walls (13) and (13), and a plurality of shelves (1
4) is attached to the rack (10) through the front opening or the rear opening so that items such as books can be taken in and out of the shelf board (14).

As shown in FIG. 2, a plurality of wheels (20) are rotatably provided on the bottom wall (11) of the moving rack (10), and one side end of the bottom wall (11) is provided. , A sprocket (21) is rotatably provided, and when the sprocket (21) is rotationally driven, a predetermined wheel (20) is rotationally driven via a power transmission system (not shown), and a moving rack ( 10) is configured to run on the rail (1).

As shown in FIG. 3, one side wall (13) of the movable rack (10) has an outer face plate (31) and an inner face plate (32), and at a predetermined position of the outer face plate (32), A handle mounting hole (31a) is formed.

A handle mechanism support member (33) is fixed to the inner surface of the outer plate (31) in correspondence with the handle mounting hole (31a), and the support member (33) is also provided.
A shaft insertion hole (33a) is formed in the shaft so that the shaft center is aligned with the handle mounting hole (31a). Further, in the shaft insertion hole (33a) of the support member (33), the bearing (3
It is rotatably attached via 9).

A sprocket (35) is fixed to the inner end side of the cylindrical handle shaft (34), and the sprocket (35) and the sprocket (21) of the bottom wall (11) shown in FIG. A chain (25) is laid between them.

Further, a handle (37) as an operating member is fixed to the outer end side of the cylindrical handle shaft (34) via a handle mounting member (36).

As shown in FIG. 1, a handle body (38) is attached to the handle (37) so that it can be stored / removed, and the handle (37) can be rotated while the handle body (38) is taken out. At this time, as shown in FIGS. 1 to 3, the cylindrical handle shaft (34) and the sprocket (35) rotate, and the rotational force thereof is transmitted through the chain (25) to the sprocket (21). )
When the wheel rotates, the wheels (20) are rotationally driven as described above, and the movable rack (10) is driven to travel in the front-rear direction according to the steering wheel rotating direction.

Here, in this embodiment, the handle shaft (34), the sprocket (35), and the chain (2)
5), sprocket (21) and sprocket (2)
The power transmission system and the like between 1) and the wheels (20) constitute a power transmission mechanism.

As shown in FIG. 3, the cylindrical handle shaft (3
A lock operation shaft (41) is slidably provided in the inside of 4) along the axial direction, and a lock operation knob (42) is fixed to the outer end of the operation shaft (41). There is.

Further, a lock member support plate (43) is fixed to the inner end of the lock operation shaft (41), and the outer peripheral teeth (35a) of the sprocket (35) are attached to the lower end of the support plate (43). The lock member (40) which can be inserted and engaged is fixed between each of the above.

The lock member (40) and its supporting plate (43) are restricted from rotating in the axial direction of the lock operating shaft (41), and together with the lock operating shaft (41) in the rotation restricted state. It is configured to slide in the axial direction.

As shown by the solid line in FIG. 3, when the lock operation knob (42) is pulled to slide the lock member (40) together with the operation shaft (41) outward (advance), the lock member (40) is moved. ) Engages with the outer peripheral teeth (35a) of the sprocket (35) to prevent the sprocket (35) from rotating, thereby preventing rotation of the wheels (20), that is, traveling of the moving rack (10). Is configured. Further, as shown by the imaginary line in the figure, when the lock operation knob (42) is pushed in from the locked state to slide (retract) the lock member (40) inward together with the operation shaft (41), the lock operation is performed. The member (40) retracts and separates from the outer peripheral teeth (35a) of the sprocket (35),
By allowing the sprocket (35) to rotate,
The rotation of the wheels (20), that is, the traveling of the moving rack (10) is allowed.

In this embodiment, in the locked state shown by the solid line in FIG. 3, the main body (3) of the handle (37) is
When the housing 8) is stored, the lock operation knob (42) is pushed by the main body (38) thereof, and the lock is automatically released as shown in the phantom line in the figure.

On the other hand, as shown in FIGS. 3 to 6, a lock releasing unit (50) for automatically releasing the lock by the lock member (40) when an earthquake occurs.
Is a housing (60), an oscillating body (70), a slider (80), and an oscillating arm (9 as a slider holding means.
0), and a tension coil spring (100) as a biasing means.
Is provided as a basic configuration.

The housing (60) has a hat-shaped shape in a front view, and the upper wall thereof is configured as a support plate (61), and a disc-shaped member is provided on the rear portion of the upper surface of the support plate (61). The seat plate (62) is fixed.

The support plate (6) in the housing (60)
1) A U-shaped arm mounting piece (95) is provided on the lower surface side front part.
Is fixed, and a front portion of a U-shaped swing arm (90) is attached to the arm attachment piece (95) so as to be vertically rotatable.

Engagement projections (91) are integrally formed on the rear portions of both side flanges of the swing arm (90). The engaging projection (91) has a rear end edge which is vertically raised to serve as an engaging surface (91a) and a front portion which is gently inclined to serve as a cam surface (91b).

The oscillating body (70) has a lower end surface (71a) formed in a hemispherical shape and a weight body (71). The lower end of the weight body (71) is projected downward along the axial direction. And a disc-shaped engaging plate (73) which is provided in a horizontal state at the lower end of the connecting shaft (72) so that their axes coincide with each other.

This oscillating body (70) is its weight body (71).
Are arranged on the upper surface of the seat plate (62) of the housing (60), and the connecting shaft (72) includes the seat plate (62), the support plate (61) of the housing (60) and the swing arm (9).
The web of 0) is inserted through in a loosely fitted state.

As a result, the oscillating body (70) moves the connecting shaft (7).
2) It is configured to be swingable in all directions around the periphery, and with the swing, the engagement plate (73) of the swing body (70) is locked to the web of the swing arm (90). By pushing up the rear portion of the swing arm (90), the swing arm (90) swings upward with the front shaft support portion as a fulcrum.

Since the center of gravity of the rocking body (70) is set low and the lower end surface (71a) is formed in a hemispherical shape, the rocking body (70) after rocking.
When the gravitational load of the swing arm (90) is applied to the lower end engaging plate (73) of the above, it automatically returns to the vertical posture smoothly.

A long hole (81) is formed on both side walls of the housing (60) along the front-rear direction, and both sides of a plate-like slider (80) are slidable in the long hole (81). Accommodated, the slider (80) has an elongated hole (8
It is configured to be slidable in the length direction (1) (front-back direction).

Further, on the lower surface of the slider (80), an inverted L
The horizontal piece of the V-shaped lock operation plate (85) is fixed. The rear end of the horizontal piece of the lock operation plate (85) is bent upward to form an engagement piece (86) which can be engaged with the engagement protrusion (91) of the swing arm (90). ing. Also, the vertical piece (8) of the lock operation plate (85)
7) is arranged so as to project from the lower opening of the housing (60) and extend downward.

A spring fixing pin (101) is fixed between the front end portions of both side walls of the housing (60),
A tension coil spring (100) is bridged on both sides between the fixing pin (101) and the slider (80).

Then, the slider (80) and the lock operating plate (85) are slid rearward against the biasing force of the tension coil spring (100), and the engaging piece ( 86) and swing arm (9
0) engaging projections (91), which results in
The set state (initial state) shown in FIG.

When the rocking body (70) rocks from this set state due to the occurrence of an earthquake or the like, as shown in FIG. 4 (b), the engaging plate (73) of the rocking body (70) causes the rocking arm (9) to move.
0) is pushed upward to engage the engagement protrusion (91) of the swing arm (90) with the engagement piece (8) of the lock operation plate (85).
6) The engagement with 6) is released. Thereby, the lock operation plate (85) is configured to slide forward by the biasing force of the tension coil spring (100).

Unlock unit (50) of this structure
However, as shown in FIG. 3, it is fixed to the upper end of the handle mechanism support member (33) of the movable rack (10) by screwing or the like. At this time, the lock release unit (5
0) lock operating plate (85) vertical piece (8
The lower end of 7) is arranged so as to face the upper end of the lock member support plate (43) in the moving rack (10).

The moving rack device of this embodiment is configured as described above, and the lock release unit (50) thereof is provided.
Is set to the initial state shown in FIG. 4 (a) and is normally used.

When an earthquake occurs in this state, as shown in FIG. 4 (b), the rocking body (70) of the unlocking unit (50) rocks so that the lock operating plate (85) moves. Slide forward. The lock member support plate (43) is pushed in by the operation plate (85), and as shown in the phantom line in FIG.
However, the lock is released by separating from the outer peripheral teeth (35a) of the sprocket (35).

By releasing the lock in this way,
The moving rack (10) travels following the earthquake vibration, and the vibration energy is absorbed. Therefore, it is possible to prevent the adverse effects of the vibration, such as the overturning of the rack (10) and the drop of stored items.

On the other hand, after the lock releasing unit (50) is activated, the lock operating knob (42) of the moving rack (10) may be pulled and locked to set the unit (50) to the initial state. .

That is, when the lock operation knob (42) is pulled, the lock operation plate (85) of the lock release unit (50) is pushed by the lock member support plate (43), and the plate (85) and Slider (8
0) slides backwards against the biasing force of the tension coil spring (100). At this time, the lock operation plate (85)
The engaging piece (86) of is guided along the cam surface (91b) of the engaging protrusion (91) of the swing arm (90),
The swing arm (90) is lifted upward, and the engaging piece (86) of the lock operation plate (85) is moved to the swing arm (9).
0), the swing arm (90) swings downward due to its own weight when it gets over the engagement protrusion (91), and the engagement surface (91a) of the engagement protrusion (91) of the swing arm (90). Automatically engages with the engagement piece (86) of the lock operation plate (85). Furthermore, the oscillating body (70) automatically and smoothly returns to the vertical standing posture by the gravity load of the oscillating arm (90) being applied to the engaging plate (73) at the lower end thereof.

As described above, according to the moving rack device of this embodiment, unlike the case where the components for automatic unlocking are individually attached to the moving rack (10), only the unlocking unit (50) is assembled. Therefore, the automatic unlocking function can be easily added, and the cost can be reduced.

Further, since the lock release unit (50) performs the lock release operation by the linear movement such as the sliding movement of the slider (80) and the lock operation plate (85), the rotation of the lever system or the link system is performed. The operation reliability can be improved, and the quality can be improved, as compared with the case of using exercise.

Further, the lower end surface (71a) of the weight body (71) of the rocking body (70) of the unlocking unit (50) is formed in a hemispherical shape, and the lower end surface (71a) is used as an installation surface. No matter what direction the rocking body (70) rocks, the lower end surface (71a) of the hemisphere is the seat plate (62).
Makes a rolling contact with. Therefore, the oscillating body (70) can accurately detect earthquakes in all directions, and the adverse effects of earthquakes can be prevented more reliably.

Further, since the rocking body (70) of the lock releasing unit (50) is automatically returned to the vertical standing posture, after the lock releasing unit (50) is operated,
For example, the lock releasing unit (50) can be easily returned to the initial state by only performing the lock operation of the moving rack (10). Therefore, a troublesome returning operation is not necessary, and the moving rack itself can be handled more easily.

In the above embodiment, the case where the present invention is applied to a manual type moving rack device has been described, but the present invention is not limited to this, and can be applied to an electric type moving rack device.

[0052]

As described above, according to the moving rack apparatus of the present invention, the automatic unlocking component is unitized, and the unlocking unit is incorporated to provide the automatic unlocking function. Unlike the case where the components for automatic unlocking are individually attached to the moving rack, the assembling work can be performed easily and the cost can be reduced. Further, since the unlocking operation is performed by linear motion such as sliding motion of the slider of the unlocking unit, the operation reliability can be improved as compared with the one using the rotary motion such as the lever system or the link system. There is an effect that higher quality can be obtained.

In the present invention, when the lower end surface of the weight body of the rocking body in the lock releasing unit is formed in a hemispherical shape, the hemispherical lower end surface supports the housing regardless of the direction of the rocking body. Since it comes into rolling contact with the plate without difficulty, there is an advantage that the oscillating body can accurately detect earthquakes in all directions and improve the sensitivity.

Further, in the present invention, when the rocking body of the lock releasing unit is automatically returned to the vertical posture, the lock releasing unit can be easily returned to the initial state only by performing the locking operation of the moving rack. Therefore, there is an advantage that the moving rack can be handled more easily without requiring a troublesome returning operation.

[Brief description of drawings]

FIG. 1 is a perspective view showing a movable rack device according to an embodiment of the present invention.

FIG. 2 is a side view schematically showing the internal structure of the lower half of the side wall of the movable rack of the embodiment.

FIG. 3 is an enlarged cross-sectional view showing the periphery of the handle mechanism portion of the moving rack of the embodiment.

4A and 4B are sectional views showing a lock releasing unit applied to the movable rack of the embodiment, in which FIG. 4A is a sectional view in an initial state and FIG. 4B is a sectional view in an operating state. is there.

FIG. 5 is a front view showing the lock release unit of the embodiment.

FIG. 6 is a bottom view showing the unlocking unit of the embodiment.

[Explanation of symbols]

10 ... Moving rack 37 ... Handle (operation member) 40 ... Lock member 50 ... Unlock unit 60 ... Housing 70 ... Oscillator 71 ... Weight 71a ... Hemispherical lower end surface 72 ... Connection shaft 73 ... Engagement plate 80 ... Slider 90 ... Swing arm (slider holding means) 100 ... tension coil spring (biasing means)

Claims (3)

[Claims] 1. A moving rack configured to allow an operating force of an operating member to be transmitted to a wheel on a bottom surface by a power transmission mechanism so as to travel, and a lock member that is detachably attached to the power transmission mechanism. When the lock member is engaged, the operation of the power transmission mechanism is blocked to prevent the traveling of the moving rack, and when the lock member is disengaged, the operation of the power transmission mechanism is permitted to allow the traveling of the moving rack. A movable rack device configured as described above, comprising a lock release unit for unlocking the lock member in a state of being engaged with the power transmission mechanism in a disengaged state, the lock release unit having a support plate A housing, an oscillating body vertically oscillatably mounted on the support plate, and a slidable slidable member provided on the housing and slidable between a predetermined retracted position and an advanced position. And a biasing means provided on the housing and for biasing the slider in the advancing direction, and a slider provided on the housing and at the retracted position against the biasing force of the biasing means. A slider holding means for holding the slider, and the slider holding means releases the holding of the slider based on a swinging motion of the swinging body. When the oscillating body is swung due to an earthquake or the like, the slider is released from the slider holding means by the oscillating body, and the slider is advanced. It is energized and operated by the slider that has advanced,
A movable rack device, wherein the lock member is disengaged from the power transmission mechanism and the traveling of the movable rack is allowed. 2. The oscillating body of the unlocking unit includes a weight body having a hemispherical lower end surface, a connecting shaft provided at a lower end of the weight body so as to project downward, and a connecting shaft of the connecting shaft. An engaging plate provided at a lower end, and the connecting shaft is pierced in a support plate of the housing in a loosely fitted state while the lower end surface of the weight body is placed on the supporting plate of the housing. The movable rack device according to claim 1, wherein the swing body is swingably supported by the support plate. 3. The moving rack device according to claim 1, wherein the oscillating body of the unlocking unit is configured to automatically return to an upright state.