JP6703690B2 - Mobile shelf - Google Patents

Description

The present invention relates to a movable rack that can be moved by manual force.

2. Description of the Related Art There is known a manual-type movable rack that has a power transmission mechanism that transmits the rotational force of a handle that is rotationally operated to traveling wheels and that can be moved by rotating the handle with a manual force.

A manual mobile shelf generally includes a side panel attached to a side surface, a handle supported by the side panel, and a power transmission mechanism that transmits the rotational force of the handle to traveling wheels. The power transmission mechanism is incorporated in the space formed between the movable shelf body and the side panel. Since the space cannot be used as a storage space for articles, it is desirable that the space be as narrow as possible.

In the conventional manual type movable rack, a handle support member is attached to the inner side surface of the side panel with an appropriate space between the side panel and the power transmission to the space between the side panel and the handle support member. The mechanism is attached. Furthermore, a part of a lock mechanism that locks the movable shelf so that it cannot move is attached to the space. The shaft of the handle is supported by a bearing arranged in the space between the handle panel and the side panel, which is secured by the handle support member (see, for example, Patent Document 1).

According to the conventional manual type moving shelf, the ratio of the width of the space between the side panel and the handle support member when the moving shelf is viewed from the front direction, that is, the direction in which articles are taken in and out, is the width of the article housing space. On the other hand, it is relatively large. If the ratio of the width of the space between the side panel and the handle support member to the width of the article storage space can be reduced, the article storage efficiency of the movable rack can be increased.

Japanese Utility Model Publication No. 6-20430

It is an object of the present invention to provide a movable rack that can reduce the ratio of the space between the side panel and the handle support member to the width of the article storage space to improve the article storage efficiency.

The present invention is
A mobile shelf having a power transmission mechanism for transmitting the rotational force of a handle that is rotationally operated to traveling wheels,
A side panel attached to the side of the moving shelf,
A handle support member attached to the inner surface side of the side panel,
A shaft of the handle, which penetrates the side panel and is supported by the side panel and the handle support member;
A first bearing and a second bearing that rotatably support the shaft of the handle,
The second bearing is attached to the inner surface side of the handle support member,
The first main feature of the first bearing is that the first bearing extends into the handle outside the side panel.

By inserting the bearing that supports the shaft of the handle into the handle, the space between the inner surface side of the side panel and the handle support member can be narrowed, and a movable shelf with high article storage efficiency can be obtained.

It is an appearance side view showing an example of a mobile shelf concerning the present invention. It is an expanded sectional view which follows the AA line shown in FIG. It is sectional drawing which expands and shows a part of FIG. It is sectional drawing which expands and shows a part of cross section which follows the BB line shown in FIG. It is the side view which looked at the principal part of the above-mentioned example from the inner surface side of a mobile shelf. It is a perspective view which shows the relationship between the support|pillar and the arm of the lock operation shaft in the said main part. It is sectional drawing which shows another Example of the movable shelf which concerns on this invention according to FIG. It is a side view which shows the principal part of said another Example according to FIG. It is a perspective view which shows the relationship between the support|pillar and the arm of the lock operation shaft in the said another Example according to FIG. It is a side view which shows the comparative example of the mobile shelf which does not have the technical idea of this invention. It is an expanded subordinate sectional view which shows the principal part of the said comparative example. It is the side view which looked at the principal part of the above-mentioned comparative example from the inner surface side of a mobile shelf.

Hereinafter, embodiments of the movable shelf according to the present invention will be described with reference to the drawings.

First, an outline of an embodiment of the movable rack will be described. In FIG. 1, the movable rack 1 has a storage/removal surface for articles that extends in a direction orthogonal to the paper surface. In some cases, the storage/removal surface of the article is referred to as the front surface. In this specification, the front face is the front face. FIG. 1 shows a side surface of the movable rack 1.

The movable shelf 1 has a side panel 10 on its side surface, and a ring-shaped handle 20 that can be rotated by the side panel 10 is provided so as to project to the outside of the side panel 10. Traveling wheels 2 are rotatably supported on the bottom of the movable rack 1. The traveling wheels 2 are placed on the rails 3, and the traveling wheels 2 roll on the rails 3 so that the movable rack 1 can move along the rails 3. The moving direction of the movable rack 1 is a direction orthogonal to the front surface.

The handle 20 has a plurality of spokes 21, and the spokes 21 are assembled on the hub 22 at the center of the handle 20. A power transmission mechanism, which will be described in detail later, is interposed between the steering wheel 20 and the traveling wheels 2. The power transmission mechanism is a deceleration mechanism, and the movable rack 1 can be moved lightly by rotating the handle 20 by a manual force. A handle 23 is attached to the handle 20 so that the handle 20 can be rotated by grasping the handle 23.

Usually, a plurality of movable shelves 1 are placed on rails 3, a space required for work is provided in front of the movable shelves 1 for moving articles in and out, and the other movable shelves 1 can be converged. .. Therefore, by installing a plurality of movable shelves 1, the limited space can be used as an article storage space. The space required for the work formed on the front surface of the movable shelf 1 is referred to as a "work passage". Hereinafter, embodiments of the movable rack according to the present invention will be described in more detail.

The first embodiment is shown in FIGS. As shown in FIG. 2, the movable rack 1 has three columns 70 at the frontage direction, that is, at both ends in the left-right direction in FIG. The bottom end of each of the columns 70 is fixed to the underframe of the bottom of the movable shelf 1, and stands upright from the underframe. Each of the columns 70 is a channel-shaped member and has a U-shaped cross section with one side of the square open. Of the three columns 70 on both ends in the left-right direction of the movable shelf 1, the columns 70 located in front of and behind the movable shelf 1 are arranged with the released surfaces facing inward. Of the three columns 70 on the side where the handle 20 of the movable shelf 1 is attached, the central column 70 is arranged with the released surface facing the side panel 10.

When the movable shelf 1 is viewed from the front, the shelf supports are hung on the front and rear columns 70 on the left and right sides, and the shelf plate 74 is supported by the left and right shelf supports. In the illustrated example, shelf boards 74 are respectively supported in front of and behind the movable shelf 1.

A handle support member 40 is located proximate to the open surface of the central post 70 on the side to which the handle 20 is attached. In other words, the pillar 70 is located behind the handle support member 40.

2 to 6, a handle support member 40 is fixed to the inner surface side of the side panel 10. As shown in FIG. 1, the handle 20 is provided at a height position of the movable shelf 1 suitable for rotating operation by a person in a standing posture, and is provided at a height position corresponding to the height position of the handle 20. The handle support member 40 is fixed. As shown in FIGS. 2 to 4, the handle support member 40 is bent at both side edges of a metal plate, and the bent portions are joined to the side panel 10 by bolts or the like, so that the inner surface of the side panel 10 is It is fixed with an appropriate space in between.

A tubular shaft (hereinafter referred to as “tube shaft”) 24 penetrates the side panel 10 and the handle support member 40. The tube shaft 24 is coupled to an inner ring of a bearing 26 arranged on the outer surface side of the side panel 10 and an inner ring of a bearing 28 arranged in the space between the handle support member 40 and the side panel 10. .. The outer ring of the bearing 26 is connected to the side panel 10, and the outer ring of the bearing 28 is connected to the inner surface side of the handle support member 40. Therefore, the tubular shaft 24 is rotatably supported by the bearings 26 and 28. The bearing 26 is the main bearing, which serves as the first bearing, and the bearing 28 serves as the second bearing.

The end of the tube shaft 24 on the side panel 10 side is connected to the center of the hub 22 of the handle 20. A plurality of (two in the example shown in FIG. 1) spokes 21 extend toward the center from the inner peripheral portion of the ring-shaped handle 20, and each spoke 21 gathers at the hub 22 and is joined to the hub 22. Between the side plate 10 and the handle support member 40, the sprocket 60 and the lock plate 35 are fitted on the outer circumference of the pipe shaft 24, and the sprocket 60 and the lock plate 35 are integrally connected to the pipe shaft 24. Therefore, the handle 20, the spokes 21, the hub 22, the tube shaft 24, the sprocket 60, and the lock plate 35 can rotate integrally. The sprocket 60 is on the side panel 10 side, and the lock plate 35 is provided between the sprocket 60 and the second bearing 28.

The handle support member 40 supports a take-up sprocket 80 diagonally below the sprocket 60. The sprocket 60 constitutes a part of a power transmission mechanism that transmits the rotational force of the handle 20 that is rotationally operated to the traveling wheels 2. The sprocket 80 is for adjusting the tension of the chain that constitutes the power transmission mechanism. A handle 23 that can be used when rotating the handle 20 is provided on the outer periphery of the handle 20. The power transmission mechanism will be described in detail later.

A circular recess 25 is formed on the hub 22 on the side facing the side panel 10. The first bearing 26 enters the recess 25, and the bearing 26 is surrounded by the hub 22. The first bearing 26 is conventionally arranged on the inner surface side of the side panel 10. Therefore, in the conventional movable shelf, the width of the space between the side panel 10 and the handle support member 40 becomes large, and the storage efficiency of the articles cannot be improved. According to the embodiment shown in FIGS. 2 to 6, the width of the space between the side panel 10 and the handle support member 40 can be reduced, and the storage efficiency of articles can be improved.

The lock plate 35 is one of the components of the lock mechanism 30 that locks the movable rack 1 so that it cannot move. The lock mechanism 30 includes a lock operation knob 31, a lock operation shaft 32, an arm 33, an engagement protrusion 34, and a lock plate 35. The lock operation shaft 32 penetrates the pipe shaft 24. The front end portion of the lock operation shaft 32 projects from the tube shaft 24 and is in a recess formed on the front end side of the hub 22. A central hole formed at the rear end of the lock operation knob 31 is press-fitted into the front end portion of the lock operation shaft 32 protruding from the front end of the tube shaft 24. The front end of the lock operation knob 31 projects slightly forward of the front end of the handle 20. By gripping and pulling the lock operating knob 31 and pushing the lock operating knob 31, the lock operating shaft 32 can slide along the tube shaft 24.

The rear end portion of the lock operation shaft 32 projects behind the tube shaft 24 and the handle support member 40, and enters the pillar 70 from the release surface of the central pillar 70. A base end of a plate-shaped arm 33 is connected to the rear end of the lock operation shaft 32. The arm 33 extends laterally from the lock operation shaft 32 in parallel with the handle support member 40. An engagement protrusion 34 is fixed to a position near the tip of the arm 33. The engagement protrusion 34 extends toward the side panel 10 and penetrates the hole of the handle support member 40. The engagement protrusion 34 is located at a position facing the outer peripheral edge of the lock plate 35, and in the embodiment shown in FIGS. 3 and 4, the tip of the engagement protrusion 34 and the lock plate 35 are separated from each other. The component part including the lock operation knob 31, the lock operation shaft 32, the arm 33, and the engagement protrusion 34 is referred to as a “lock operation member”.

As shown in FIG. 5, the lock plate 35 is a gear-like member in which a plurality of notches 351 are formed at equal intervals on the outer peripheral edge of a disc. The engaging projection 34 is located so as to face the outer peripheral edge portion of the lock plate 35 where the notch 351 is formed. In the mode shown in FIGS. 2 and 3 in which the engagement protrusion 34 is separated from the lock plate 35, the handle 20 can be rotated, and the movable shelf 1 can be moved by rotating the handle 20.

When inconvenience arises when the movable shelf 1 is moved inadvertently, such as when carrying out an operation for taking articles in and out of the movable shelf, the lock operation knob 31 is pulled, the above-mentioned “lock operation member” is moved, and the engagement protrusion 34 is moved. The lock plate 35 is engaged with one of the notches 351. In this mode, since the lock plate 35 is prevented from rotating, neither the handle 20 nor the sprocket 60 can rotate, the power transmission mechanism to the traveling wheels 2 cannot operate, and the traveling wheels 2 also rotate. I can't. Therefore, the movable rack 1 is locked immovably. When the lock operation knob 31 is pushed in, the engagement protrusion 34 is separated from the lock plate 35, and the movable rack 1 is unlocked.

In this way, by engaging and disengaging the engagement projections 34 forming the lock mechanism 30 from the lock plate 35 forming the lock mechanism 30, the movable shelf 1 is locked immovably, and You can unlock it.

As shown in FIG. 6, the central support column 70 is formed with a lock operation shaft 32 that constitutes a “lock operation member” and a notch 71 that is a relief for the arm 33 that is integral with the lock operation shaft 32. .. The notch 71 is provided to avoid interference with a part of the “lock operation member”, in the illustrated example, during the locking and unlocking operations of the lock mechanism 30, that is, the interference between the lock operation shaft 32 and the column 70. ing.

If the notch 71 of the strut 70 is not provided, in order to avoid the interference between the lock operation shaft 32 and the arm 33 and the strut 70, the lock operation shaft 32 and the arm are provided between the strut 70 and the handle support member 40. It is necessary to provide a space required for the operation of 33. Therefore, there is a wasteful space that does not function as an article storage space, and the article storage efficiency of the movable rack is reduced.

In this regard, according to the above-described embodiment of the present invention, the lock operation shaft 32 and the arm 33 can be made to enter the support column 70 by providing the notch 71 in the support column 70, and the support column 70 and the handle support member 40 Can be closely attached. Therefore, the useless space that does not function as the article storage space is eliminated, and the article storage efficiency of the movable shelf 1 can be improved.

[Lock release mechanism]
FIG. 5 shows an example in which a lock release mechanism is added to the above embodiment. In FIG. 5, on the back side of the handle support member 40, the upper end portion of the pendulum 82 is suspended by a horizontal shaft 83 at the upper left portion. A weight 84 is fixed to the lower end of the pendulum 82. The pendulum 82 hangs down along gravity in normal times, but when the movable shelf 1 shakes due to an earthquake, it swings around the shaft 83 together with the weight 84. A part of the arm 33 extending laterally from the lock operation shaft 32 overlaps in the middle of the pendulum 82 in the vertical direction, and the swing of the pendulum 82 causes the pendulum 82 to contact the arm 33. Therefore, when the pendulum 82 swings due to an earthquake, the pendulum 82 moves the arm 33 and unlocks the movable rack 1.

It is known that when the movable rack 1 is movable on the rails 3, seismic energy is not transmitted to the movable rack 1 and there is a seismic isolation effect. When an earthquake occurs while the movable rack 1 is locked immovably by the lock mechanism 30 such as taking goods in and out of the movable rack 1, the lock is released by the lock release mechanism, and the seismic isolation function of the movable rack 1 is achieved. Is demonstrated.

A second embodiment of the movable rack according to the present invention will be described with reference to FIGS. The second embodiment is different from the above-mentioned embodiments in the structure of the lock operating member and the structure for avoiding the interference between a part of the lock operating member and the support column, so this point will be mainly described. , The other components are given common reference numerals, and the description is simplified.

7 to 9, the rear end portion of the lock operation shaft 32 enters into the support column 70 from the open surface 72 of the center support column 70 of the three front and rear columns 70 on the side panel 10 side of the movable shelf 1. is doing. An arm 38 is fixed to the rear end of the lock operation shaft 32 in the column 70. The arm 38 hangs along the length direction of the strut 70 and is located in the inner space of the strut 70 so as to operate without interfering with the strut 70. In other words, the arm 38 extends into the column 70 from the open surface of the column 70 and extends in the column 70 from the lock operation shaft 32 in the vertical direction. An engaging protrusion 39 projects toward the lock plate 35 from the tip of the arm 38, that is, the lower end in the figure.

The engagement protrusion 39 penetrates a hole provided in the handle support member 40, and the tip of the engagement protrusion 39 faces the peripheral edge of the lock plate 35. When the lock operation knob 31 is pushed in, the engagement protrusion 39 is separated from the lock plate 35, and as described above, the movable shelf 1 can be moved by rotating the handle 20. When the lock operation knob 31 is pulled, the lock operation member including the lock operation shaft 32 and the arm 38 moves, and the engagement protrusion 39 engages with one of the cutouts 351 in the outer peripheral edge portion of the lock plate 35. As is the case, the movable rack 1 is locked immovably.

According to the second embodiment, the lock operation shaft 32 and the arm 38 can be inserted into the support column 70, and the support column 70 and the handle support member 40 can be brought into close contact with each other. Therefore, the useless space that does not function as the article storage space is eliminated, and the article storage efficiency of the movable shelf 1 can be improved. It is not necessary to provide the notch 71 in the column 70.

[Comparative example]
In order to clarify the effect of each embodiment of the moving rack according to the present invention, an example of a conventional moving rack that does not have the characteristic configuration of the present invention will be described. The same components as those of the above embodiment are designated by the same reference numerals.

10 to 12, the movable shelf 100 has a handle 120 attached to the outside of the side panel 10. The handle 120 has a plurality of spokes 121, and each spoke 121 is connected to a hub 122 at the center of the handle 120. A tube shaft 124 is press-fitted in the center of the hub 122. The tube shaft 124 is coupled to the inner ring of the first bearing 26 having the outer ring fixed to the inner surface of the side panel 10 and the inner ring of the second bearing 28 having the outer ring fixed to the handle support member 40. Therefore, the handle 120 and its tube shaft 124 are rotatably supported.

There is a space between the side panel 10 and the handle support member 40. In this space, there are a sprocket 60 and a lock plate 35, and the sprocket 60 and the lock plate 35 are integrally connected to the outer circumference of the tube shaft 124. A chain 61 is hung on the sprocket 60, and the chain 61 is also hung on a sprocket 62 provided at the bottom of the movable rack 100. A take-up sprocket 80 is pressed against the chain 61, and an appropriate tension is applied to the chain 61.

A small-diameter sprocket 63 is provided integrally with the sprocket 62 and has a common axis. A sprocket 65 is integrally provided on the shaft of one of the front and rear traveling wheels 2, and a chain 64 is spanned between the sprocket 63 and the sprocket 65. The sprocket 60, the chain 61, the sprockets 62 and 63, the chain 64, and the sprocket 65 constitute a power transmission mechanism that transmits the rotational force of the handle 120 to the traveling wheels 2. This power transmission mechanism constitutes a speed reduction mechanism, and even the heavy moving rack 100 can be easily moved by manually rotating the handle 120.

As shown in FIGS. 11 and 12, the movable rack 100 has a lock mechanism. The lock plate 35 forming a part of the lock mechanism is arranged between the sprocket 60 and the first bearing 26 in the space between the side panel 10 and the handle support member 40. The lock operating member includes a lock operating knob 131, a lock operating shaft 32, an arm 133, and an engaging protrusion 134. The lock operation shaft 132, the arm 133, and the engagement protrusion 134 are formed by bending one cylindrical member. The arm 133 is laterally bent along the outer surface of the handle support member 40. The engaging projection 134 engages with one of the notches in the outer peripheral edge portion of the lock plate 35 and is separated therefrom to lock and unlock the movable shelf 100.

11 and 12 also show another configuration of the lock operating member. Another configuration of the lock operating member is different in that an arm 138 integrated with the lock operating shaft 132 is bent downward. The tip portion of the arm 138 is bent toward the lock plate 35 to form an engagement protrusion 139.

In the comparative example of the movable rack shown in FIGS. 10 to 12, a space in which the first and second bearings 26 and 28 that rotatably support the handle 120 are formed between the side panel 10 and the handle support member 40. It is located in. Therefore, the space between the side panel 10 that does not contribute to the storage of the articles and the handle support member 40 is widened, and the article storage efficiency of the movable shelf is reduced.

In addition, in the comparative example of the movable rack shown in FIGS. 10 to 12, measures are taken to avoid interference between a part of the lock operation member protruding on the back side of the handle support member 40 and the column of the movable rack. Absent. Therefore, it is necessary to provide a space between the handle support member 40 and the support column that does not hinder the operation of the lock operation member, which lowers the article storage efficiency of the movable rack.

According to each of the embodiments of the movable shelf according to the present invention, since the bearing of the handle is inserted into the recess formed in the hub of the handle, the width of the space between the side panel and the handle support member can be reduced. Therefore, the storage efficiency of the articles can be improved.

According to each of the embodiments of the movable shelf according to the present invention, in addition to the above effects, the following effects can be obtained.
Since the width of the space between the side panel and the handle support member can be reduced, the space provided on the side surface of the movable shelf on which the handle is mounted can be increased. As a result, the convenience of moving a dolly or a book truck can be improved, and the efficiency of loading and unloading articles can be improved.

A part of the lock operating member can be inserted into the pillar, and the pillar and the handle support member can be brought into close contact with each other. Therefore, a wasteful space that does not function as an article storage space is eliminated, and the article storage efficiency of the moving shelf can be improved.

The thickness of the side panel when viewed from the front side of the mobile shelf can be made smaller, the appearance of the mobile shelf is slimmer, and it gives a smart impression compared to the conventional mobile shelf that had a severe impression. You can

The conventional lock shaft is formed by bending one round bar as shown in FIGS. 11 and 12, but it has a structure in which an arm is fixed to a linear lock shaft as in the illustrated embodiment. By doing so, the depth dimension of the lock shaft can be reduced. As a result, the depth of the lock mechanism can be reduced, which is one of the factors that enhance the efficiency of accommodating articles in the moving shelf.

2 Traveling Wheel 10 Side Panel 20 Handle 21 Spoke 22 Hub 23 Handle 25 Recess 24 Pipe Axis 26 First Bearing 28 Second Bearing 30 Lock Mechanism 31 Lock Operating Knob 32 Lock Operating Axis 33 Arm 34 Engagement Protrusion 35 Lock Plate 38 Arm 40 Handle support member 60 Sprocket 70 Strut 71 Notch

Claims (4)

A mobile shelf having a power transmission mechanism for transmitting the rotational force of a handle that is rotationally operated to traveling wheels,
A side panel attached to the side of the moving shelf,
A handle support member attached to the inner surface side of the side panel,
A shaft of the handle, which penetrates the side panel and is supported by the side panel and the handle support member;
A first bearing and a second bearing that rotatably support the shaft of the handle;
A locking mechanism capable of switching between a mode of locking the movable shelf immovably and a mode of releasing the lock ;
The second bearing is arranged between the handle support member and the side panel,
The first bearing enters the handle outside the side panel ,
The lock mechanism engages with the lock plate fixed to the outer periphery of the shaft of the handle between the side panel and the handle support member and the lock plate by moving along the shaft of the handle. A lock operation member that can be disengaged,
A movable shelf having a column of the movable shelf behind the lock operation member, and a notch provided in the column to allow the lock operation member to enter . The lock operating member is
A lock operating shaft that penetrates the center hole of the handle shaft,
An arm extending along the back surface of the handle support member integrally with the lock operation shaft projecting to the back surface side of the handle support member,
The movable rack according to claim 1, further comprising: an engagement projection that is integrally formed with the arm and that penetrates the handle support member to engage with and disengage from the lock plate . The arm extends laterally from the lock operation shaft,
3. The movable shelf according to claim 2, wherein the support post is formed with a relief for avoiding interference with the arm . The arm extends vertically from the lock operation shaft,
3. The movement according to claim 2 , wherein the support pillar is a channel-shaped support pillar, and the escape of the support pillar is on the release surface side of the channel-shaped support pillar, and the arm enters the support pillar from the release surface. shelf.

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