JP2002154610A - Traveling rack device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a traveling rack device capable of collecting each traveling rack in a predetermined section when an earthquake occurs, simplifying its structure, and reducing its cost. SOLUTION: This traveling rack device is provided with a plurality of traveling racks 10 on a rail 1 stretched along the forward and backward directions so as to run freely thereon. A flange 26a as a friction resistance providing means is provided on a front wheel 26 of a traveling rack 10A arranged on a front side more than the center of the rail, and a flange 26a as a friction resistance providing means is provided on a rear wheel 26 of a traveling rack 10B arranged on a rear side to restrict forward travel in the traveling rack 10A on the front side and restrict backward travel of the traveling rack 10B on the rear side to gather them at the center of the rail when a shock due to the earthquake occurs.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving rack apparatus having a plurality of moving racks provided on rails so as to be able to run freely.

[0002]

2. Description of the Related Art Conventionally, a plurality of movable racks are provided movably on rails laid on the floor surface, and the movable racks are appropriately moved so that books and the like are put in and out of the desired movable racks. Therefore, a moving rack device which is able to obtain a small space and a high storage rate is known.

[0003] In some of such mobile rack devices, a lock device is provided in order to prevent the rack from being moved carelessly. However, an earthquake or the like occurs when the lock device is prevented from moving. When the floor surface shakes greatly,
The movable rack also swings greatly, and there is a risk that the items stored in the rack may fall or the rack itself may fall over in some cases.

For this reason, when vibration due to an earthquake or the like is detected, the lock by the lock device is automatically released, and the rack is moved in accordance with the vibration to absorb the vibration energy and avoid the adverse effects of the vibration. One with a lock release function is well known.

However, in the mobile rack device having the lock release function, when the lock is released due to the occurrence of an earthquake, the respective mobile racks are free to move individually, so that, for example, adjacent racks collide with each other. The movable rack located at the end may collide with the stopper at the end of the rail, causing the contents in the rack to fall or the rack to fall over, leaving room for improvement. .

Therefore, in recent years, when the lock is released due to an earthquake or the like, a plurality of racks are gathered at a predetermined position by giving a direction to the movement of each rack. A technique has been proposed in which a rack is moved in accordance with vibration to prevent a collision between racks or the like.

[0007] Such a seismic isolation mechanism is disclosed, for example, in Japanese Patent No. 2731500. The moving rack device includes a driving shaft on a front wheel side of a rack arranged on a front half of a traveling direction (front-rear direction) of a plurality of moving racks, and a driving shaft on a rear wheel side of a rack arranged on a rear half. While an electrically actuated band brake is attached to the vehicle, seismic sensing means for sensing an earthquake and control means for controlling the operation of the electrically actuated band brake based on an output signal from the seismic sensing means are provided. ing. When an earthquake is detected by the seismic sensing means, the movable racks are unlocked, and at the same time, the electrically actuated band brakes are actuated. The rear half wheels of the movable rack on the side half are braked. As a result, the front half moving rack is restricted from moving forward and moves rearward, and the rear half moving rack is restricted from moving backward and moves forward, and a plurality of racks are moved. It is configured to gather in the center.

[0008]

However, the above-mentioned conventional mobile rack apparatus is equipped with complicated devices such as an electrically operated band brake and control means for controlling the operation thereof for the seismic isolation mechanism. Therefore, there is a problem that the structure is complicated and the cost is increased.

The present invention solves the above-mentioned problems of the prior art, and when the lock is released due to an earthquake or the like, the moving racks are gathered at a predetermined location to prevent the storage articles from dropping and collision between the racks. It is an object of the present invention to provide a mobile rack device which can prevent the movement and can simplify the structure and reduce the cost.

[0010]

In order to achieve the above-mentioned object, the present invention provides a method in which a rail is laid on a predetermined installation surface along a front-rear direction, and a plurality of movable racks are provided on a bottom wall thereof. A movable rack device provided so as to be able to travel back and forth along the rails through the wheels, wherein the wheels of each movable rack are a front wheel and a rear wheel arranged in tandem along the rails. Having the plurality of moving racks,
One or more movable racks disposed on a front side of a predetermined position on the rail, and one or more movable racks disposed on a rear side, and a front wheel in the front movable rack; The gist of the invention is to provide a frictional resistance applying means for increasing frictional resistance between the wheels and the rails on the rear wheels of the rear moving rack.

Generally, in a mobile rack apparatus, when moving on rails, for example, forward due to an earthquake, each mobile rack moves with a large load applied to the front wheels and moves rearward. , And move with a large load applied to the rear wheel. At this time, in the moving rack device of the present invention, friction resistance applying means is provided on the front wheels of the moving rack arranged on the front side of the predetermined position and on the rear wheels of the moving rack arranged on the rear side. Therefore, the forward moving rack has a higher resistance to the forward movement and a lower resistance to the backward movement, and thus moves to the front, that is, the predetermined position. On the other hand, the rear moving rack has a lower resistance to the forward movement and a higher resistance to the backward movement, and thus moves to the rear, that is, the predetermined position.

Further, the present invention can be easily realized only by providing a friction resistance applying means such as a flange on a predetermined wheel.

[0013] That is, the invention of the present application is characterized in that the friction imparting means has a flange which is provided continuously along the circumferential direction on one end edge of the outer peripheral end surface of the wheel, and which protrudes in the wheel outer radial direction and contacts the side surface of the rail. It is preferable to employ one having such a configuration.

[0014] In addition, the present invention is characterized in that one of the front wheel and the rear wheel is configured as a driving wheel, and the other is configured as a non-driving wheel, It is desirable to adopt a rear rack in which the rear wheels are configured as drive wheels.

That is, since a power transmission system is connected to the driving wheels, a resistance force due to the connection to the power transmission system is applied in addition to the resistance force by the frictional resistance applying means, so that the moving rack is moved in a predetermined direction of the moving rack. Can be performed more reliably.

[0016]

FIG. 1 is a perspective view showing a moving rack apparatus according to an embodiment of the present invention. As shown in the figure, this moving rack device is placed on a floor as an installation surface,
A fixed rack (5) having a pair of rails (1) laid thereon and fixedly attached to one end of the rail (1);
A plurality of movable racks (10) provided so as to be able to run along the rails (1). In the following description, in order to facilitate understanding of the invention, the direction in which the rail (1) is laid (the length direction) will be described as the front-back direction.

The moving rack (10) has a bottom wall (20),
It has a top wall (40) and both side walls (50) and (50), and a plurality of shelves (11) are mounted inside the rack at predetermined intervals, and a front or rear opening of the rack (10) is provided. The storage unit such as a book can be put in and taken out of the shelf board (11) through the unit.

As shown in FIG. 2, the bottom wall (20) is provided with both side frames (21) and a center frame (22) at both left and right end portions and a center thereof along the front-rear direction. 2), two axle support frames (23) are provided along the front-rear direction, two on each side.

As shown in FIGS. 2 to 4, a bearing member (2) is provided on one side of the axle support frame (23) in the front-rear direction.
4), the rotary drive shaft (2) extending in the rack width direction.
5) is rotatably mounted, and drive-side wheels (26) are fixed to both sides of the rotation shaft (25).

The drive-side wheel (26) has a flange (26) protruding in the outer diameter direction at one end edge of the outer peripheral end face.
a) is formed continuously and integrally in the circumferential direction, and the driving wheel (26) is arranged on the rail (1) such that the flange (26a) contacts the upper end of the side surface of the rail (1). It is placed. Thus, the flange (26)
a) is brought into contact with the rail (1) so that the wheels (2)
6) The contact area with the rail (1) is increased to increase the frictional resistance with the rail (1).

The rotating shafts (28) are respectively provided at both sides of the bottom wall (20) on the other side in the front-rear direction of each wheel supporting frame (23) via bearing members (27).
Are rotatably mounted, and the non-drive-side wheels (29) are fixed to the respective rotating shafts (28).

As shown in FIGS. 5 and 6, the non-drive-side wheel (29) has a guide projection (29) at the center of its outer peripheral end surface.
a) is formed continuously and integrally in the circumferential direction, and the non-drive-side wheel (29) has the guide projection (29a) inserted into the center guide groove (1a) of the rail (1). It is mounted on a rail (1). In a normal state, the guide projection (29a) does not contact the inner peripheral surface of the guide groove (1a) of the rail (1), and the friction between the non-drive-side wheel (29) and the rail (1). The resistance does not increase.

As shown in FIG. 2, the power transmission shaft (30) extends between two axle support frames (23) on one side of the bottom wall (20) and one side frame (21). ) Are provided rotatably along the rack width direction, and sprockets (30a) (30b) are fixed to both ends of the power transmission shaft (30). The sprocket (30) on one end (inner end) side of the power transmission shaft (30)
Corresponding to (a), a sprocket (25a) is fixed to the rotary drive shaft (25). Further, the chain (31) is bridged between the sprockets (25a) and (30a), and the power transmission shaft (30) is rotated, whereby the rotational force is transmitted through the sprockets (25a) (30a) and the chain (31). And transmitted to the rotary drive shaft (25)
The rotary drive shaft (25) rotates, and the drive wheels (26) rotate.

On the other hand, as shown in FIGS. 1 and 7, one side wall (50) of the movable rack (10) is provided with a handle (51) rotatably at the center of its outer surface.
The rotation axis (5) of the handle (51) in the side wall (50)
2) is provided with a sprocket (51a). Further, the sprocket (51a) and the sprocket (30b) on the other end (outer end) side of the power transmission shaft (30).
When the handle (51) is rotated by the chain (32) being stretched between the sprocket (51a) (30b) and the chain (32).
Is transmitted to the power transmission shaft (30) via the power transmission shaft so that the power transmission shaft (30) rotates. This allows
By rotating the handle (51) in one direction,
The driving wheels (26) rotate so that the movable rack (10) travels in one direction (for example, forward) in the front-rear direction, and is rotated in the other direction to travel in another direction (for example, backward). It is configured.

In this embodiment, each movable rack (10) is provided with a lock mechanism and an unlocking mechanism (not shown) so that the movable rack (10) can be moved when it is not necessary to move the movable rack (10). The lock mechanism is designed to prevent unintentional rack movement, and when vibration occurs due to an earthquake or the like, the lock is released by the lock release mechanism and the vehicle is in a free-running state. It is configured to absorb energy.

In the present embodiment, as shown in FIG. 8, of the plurality of movable racks (10), the movable rack (10A) arranged on the front half has a front wheel with a drive having a flange (26a). Side wheel (26),
The rear wheels are constituted by the non-drive-side wheels (29) without flanges, while the moving rack (10
In B), the rear wheel is constituted by a driving wheel (26) with a flange (26a), and the front wheel is constituted by a non-driving wheel (29) without a flange. In FIG. 8, the wheel flanges (2
The portion corresponding to 6a) is hatched.

In the mobile rack apparatus having the above structure, when an earthquake occurs and swings, the lock is released and each mobile rack (10) enters a free running state. In this state, each of the movable racks (10) swings with the vibration of the earthquake and attempts to travel back and forth. At this time, as shown in FIG. Is provided with a flange (26a) on the front wheel (26) and the rear wheel (2).
Compared with 9), the contact area with the rail (1) is large, the frictional resistance is increased, and the rotational load is increased. In addition, since the front wheel (26) is connected to a power transmission system such as a rotary drive shaft (25) and a power transmission shaft (30), a rotational load is also higher in this respect than in the rear wheel (29). growing. Therefore, when moving the front half moving rack (10A) forward, the moving rack (10A) moves while applying a large load of the entire rack to the front wheel (26) having a large rotational load, while moving backward. The rear wheel (2
In 9), the rack is moved with a large load applied to the entire rack. For this reason, the moving rack (10A) in the front half is restricted from moving forward, and moves smoothly backward, and gradually moves backward with the quake of the earthquake. To go.

On the other hand, the rear half movable rack (10B)
In contrast to the front half movable rack (10A), the rear wheel (26) is provided with a flange (26a),
Since the rear wheel (26) is connected to the power transmission system,
The movement to the rear is restricted, and the movement to the front can be performed smoothly, and it gradually moves forward with the quake of the earthquake.

As described above, the moving rack (10
8A, the moving rack (10B) in the rear half moves forward, and the moving racks (10) assemble at the center position of the rail. As shown in (b), in a state where the moving racks (10) are gathered and gathered at the center of the rails, they run largely back and forth in response to the vibration of the earthquake.

Therefore, the racks collide violently,
It is possible to reliably prevent the rack (10) at the end position from violently colliding with the stopper at the end of the rail, causing the rack (10) to fall over or the stored articles to fall.

Further, the moving rack device of the present embodiment is provided with one of the front wheels and the rear wheels of each moving rack (10).
By simply providing the flange (26a), it is possible to provide a seismic isolation mechanism for assembling the moving racks (10) at the center position during an earthquake. For this reason, the moving rack device of the present embodiment can be simplified in structure, unlike a conventional device employing a complicated device such as an electric band brake and its control mechanism, as in the related art. Therefore, cost can be reduced.

Further, the moving rack apparatus of the present embodiment can be easily realized simply by replacing predetermined wheels in the existing moving rack with flanged wheels.
It is possible to effectively use the existing technology such as the existing moving rack without requiring a major design change or the like.

In this embodiment, the wheels (26)
Is configured so as to be able to contact and lock the side surface of the rail (1).
The wheel (26) can be prevented from coming off, and higher safety can be obtained.

In the above embodiment, each movable rack (10) is configured to be moved to the center of the rail. However, the present invention is not limited to this. For example, the movable rack may be moved to one side of the center of the rail. Or the movable racks may be assembled at two or more positions on the rail.

In the above embodiment, the wheels (2
6) is provided with a flange (26a) so as to increase the frictional resistance against the rail (1). However, the present invention is not limited to this. For example, a wide wheel may be used, or the wheel may contact the rail. The surface of the wheel is subjected to unevenness or grooving, such as knurling, or a tape having elasticity or flexibility such as synthetic resin or synthetic rubber is attached to the contact surface of the wheel with the rail, or the wheel itself is made of synthetic resin (urethane). The frictional resistance to the rail may be increased by using a material having a high frictional resistance such as resin or nylon) or synthetic rubber. In short, any means may be used as long as it can increase the frictional resistance between the wheel and the rail.

Further, in the above embodiment, the present invention
Although the description has been given of the case where the present invention is applied to a manual moving rack apparatus, the present invention is not limited thereto, and the present invention can also be applied to an electric moving rack apparatus.

Needless to say, in the present invention, the number of movable racks is not limited to the above.

[0038]

As described above, according to the moving rack apparatus of the present invention, of the plurality of moving racks, the front wheels of the moving rack arranged on the front side with respect to the predetermined position and the moving wheels arranged on the rear side with respect to the predetermined position. Since a frictional resistance applying means is provided on the rear wheel of the rack, when vibration due to an earthquake occurs, the front moving rack moves rearward, and the rear moving rack moves forward, and each moving rack moves forward. Gather at predetermined positions, it is possible to prevent problems such as collisions between racks, and to prevent falling of stored articles and collision between racks.
Furthermore, since the friction resistance applying means such as a flange is merely provided on the wheel, there is an advantage that the structure can be simplified and the cost can be reduced.

[Brief description of the drawings]

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

2A and 2B are diagrams illustrating an internal structure of a bottom wall of the moving rack in the moving rack device according to the embodiment, wherein FIG. 2A is a plan view and FIG. 2B is a side view.

FIG. 3 is a front view showing the vicinity of driving wheels in the movable rack according to the embodiment.

FIG. 4 is an enlarged front view showing the vicinity of a contact portion of a driving wheel with a rail in the embodiment.

FIG. 5 is a front view showing the vicinity of the non-drive-side wheels in the moving rack according to the embodiment.

FIG. 6 is an enlarged front view showing the vicinity of a contact portion of a non-drive-side wheel with a rail in the embodiment.

FIG. 7 is a side view showing the internal structure of the lower half of the side wall in the moving rack of the embodiment.

8A and 8B are side views schematically illustrating the moving rack apparatus according to the embodiment, wherein FIG. 8A is a side view in a dispersed state, and FIG. 8B is a side view in an assembled state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Rail 10, 10A, 10B ... Moving rack 20 ... Bottom wall 26, 29 ... Wheel 26a ... Flange (friction resistance provision means)

Claims (3)

[Claims] 1. A rail is laid on a predetermined installation surface along a front-rear direction, and a plurality of movable racks can run back and forth along the rail via wheels provided on a bottom wall thereof. Wherein the wheels of each movable rack have front and rear wheels arranged in tandem along the rail, and wherein the plurality of movable racks are located at predetermined positions on the rail. One or more movable racks arranged on the front side and one or more movable racks arranged on the rear side, and a front wheel in the front movable rack and the rear movable rack And a rear wheel provided with a frictional resistance applying means for increasing frictional resistance between the wheel and the rail. 2. The frictional resistance applying means is provided at one end of an outer peripheral end surface of the wheel continuously along a circumferential direction, and has a flange which projects in an outer radial direction of the wheel and contacts a side surface of the rail. The mobile rack apparatus according to claim 1, comprising: 3. One of the front wheel and the rear wheel is configured as a driving wheel, and the other is configured as a non-driving wheel, and the front wheel in the front moving rack and the rear wheel 3. The moving rack device according to claim 1, wherein the rear wheels of the moving rack are configured as driving wheels.