JP2007007066A - Shelf apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make a strong structure which has high resistance force against external force in a horizontal direction in a wagon where the corner parts of shelf boards quadranglar by a plane view are fixed to supports. <P>SOLUTION: Each support is made into L-shape in a plane view and formed to have an increased thickness as a whole. Each shelf board is provided with: a horizontal base part 5 on which articles are placed; peripheral walls 6 bent and formed therearound; and bent parts 7 formed at the peripheral walls 6 excepting for the corner parts. The bent parts 7 are in the form of gutters opening facing the peripheral walls 6. The end faces of the bent parts 7 abut on the side faces 11 of the supports 2. The bent parts 7 support the side faces of the supports 2 through a wide range, resistance against the inclination of the supports 2 is high, so that the wagon becomes extremely strong as the result. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a metal shelf device such as a wagon.

  For example, a metal (steel) wagon having a plurality of shelves and casters is frequently used in factories and laboratories. In this wagon, the shelf board is generally rectangular in plan view, and four corners are fixed to a column. In a general type, the support column is formed in an L-shape in plan view, while the shelf is in a thin box shape with an upward or downward peripheral wall formed on all four sides, and the peripheral wall of the shelf plate and the support column are bolted. And fastened with nuts.

  However, this simple configuration has a problem that when an external force is applied from the horizontal direction, the support column is inclined and is easily deformed into a rhombus in a side view as a whole (in other words, looseness is likely to occur). The tendency of the column to fall in this way is because the moment that the column tries to turn around the axis of the bolt cannot be suppressed. Even if the bolt is tightened strongly, rattling will occur immediately. Become.

Therefore, in Patent Document 1, it is proposed to form a folded piece that overlaps the outer surface of the peripheral wall on the peripheral wall of the shelf board, and to apply the end surface of the folded piece to the side surface of the support column to increase the overall rigidity. ing.
Japanese Patent No. 3437988

  The above-mentioned patent document 1 is intended to prevent the inclination of the support by the tensioning action of the end face of the folded piece, and the overall rigidity can be considerably improved as compared with a general type. However, the strength was still not sufficient. In particular, a bulky wagon having a large height ratio compared to a wagon on which a heavy object is placed or a depth (or width) is easily deformed as a whole.

  This invention is made | formed in view of such a present condition, and makes it a subject to provide the shelf apparatus which does not produce backlash.

  The shelf device according to the present invention includes a metal plate shelf and three or more support columns to which a plurality of peripheral portions of the shelf plate are fixed with screws, as in the conventional case. As a feature, the shelf board includes a horizontal base portion on which an object is placed, and a peripheral wall extending upward or downward from the periphery of the base portion, and the peripheral wall is formed to extend over the entire periphery of the base portion. Each said support | pillar is arrange | positioned so that it may overlap with the outer surface of a surrounding wall, the surrounding wall of a shelf board and the support | pillar are fastened with the volt | bolt, and also the part which has overlapped with the support | pillar is excluded among the said surrounding walls. The portion is formed with a bent section having a concave cross-sectional shape located on the outer side of the peripheral wall toward the peripheral wall, and thus the peripheral wall and the bent portion form a hollow cylindrical shape, and the bent portion The end face of is touched to the side of the column. The bent portion of the shelf board may be rephrased as an “outwardly projecting portion”.

  Although the present invention can be applied to a shelf apparatus that is fixedly installed, the true value is strongly exerted when applied to a movable wagon. Therefore, claim 2 is applied to a wagon. That is, in claim 2, the shelf board is formed in a square shape in plan view having four corner portions, and a bent portion having a substantially U-shaped cross section opened toward the peripheral wall is formed in a portion excluding each corner portion. By forming, the bent portion and the peripheral wall form a rectangular tube, while each support column has an inner surface portion that overlaps the corner portion of the shelf board from the outside and an outer surface portion that is positioned outside the corner portion. It is formed in a generally L-shaped hollow shape in plan view, and the peripheral wall of the shelf and the inner surface of the column are fastened with bolts, and a caster is attached to the lower end of each column.

  When an external force in the horizontal direction acts on the upper part of the shelf device, the external force acts to tilt the support column. In Patent Document 1, the end surface of the folded piece is applied to the side surface of the column to prevent the column from falling down. In Patent Document 1, the contact area between the folded piece and the column is small. It can be said that there is a limit to the deformation prevention function because the rigidity of the peripheral wall of the shelf board is not so high just by forming the shape.

  On the other hand, in the present invention, the strut is thick as a whole and the bent portion protrudes greatly outside the peripheral wall, so that the contact area between the bent portion and the post is increased, and the bent portion is on the peripheral wall. Since the concave cross-sectional shape is high and the rigidity is high, it is possible to reliably prevent the inclination of the column and ensure high rigidity. Therefore, even a shelf device on which a heavy object is placed or a shelf device having a high height can be used without causing backlash for a long period of time.

  Generally, when a wagon is moved, a person grabs and pushes the upper part, and therefore, an external force is applied to the support column to move the wagon. For this reason, in the wagon, backlash of the fastening portion between the support column and the shelf board is particularly noticeable. However, in the present invention, since the inclination of the support column can be accurately prevented, deformation due to the play can be prevented. Therefore, the true value of the present invention is more remarkably exhibited by applying to a wagon as in claim 2.

  Moreover, in patent document 1, since the head (or nut) of the bolt is exposed outside the support, there is a problem that an object is easily caught on the head of the bolt. However, in claim 2, the support is hollow, Since the fastening nut (or bolt head) can be arranged in the hollow portion of the column, it is possible to prevent the bolt head and nut from being exposed to the outside of the column, and this also has the advantage of preventing the object from being caught. is there.

  Next, an embodiment of the present invention will be described with reference to the drawings. The present invention is applied to a steel wagon.

(1). First embodiment (FIGS. 1 to 5)
1 to 5 show the first embodiment. 1A is a perspective view of the entire wagon, and FIG. 1B is a partially separated perspective view. As can be understood from FIG. 1, the wagon includes three shelf boards 1 formed in a substantially rectangular shape in plan view, four support pillars 2 fixed to the corner portions of each shelf board 1, and each support pillar. The caster 3 attached to the lower end of 2 is provided. A handle 4 having a U-shape in side view is attached to the top of the two columns 2 arranged at the short side portion of the shelf board 1. All the three-stage shelf boards 1 have the same structure.

  Next, details will be described with reference to FIG. 2A is a plan view of one corner, FIG. 2B is a plan sectional view of the corner, FIG. 2C is a CC view of FIG. 2A, and FIG. DD sectional view, (E) is a partially broken plan view in a separated state, FIG. 3 is a partial detailed perspective view of the shelf board 1, FIG. 4 is an exploded perspective view showing a mounting means of the caster 3, FIG. 5 is another example of how the shelf board 1 is attached.

  The shelf board 1 includes a base portion 5 on which an object is placed, an upward peripheral wall 6 that is bent at the periphery of the base portion 5 except for a corner portion, and an outward bent portion 7 that is formed at the upper end of the peripheral wall 6. In the present embodiment, the bent portion 7 is formed in a U-shaped cross section that opens toward the peripheral wall 6. Further, the vertical height of the bent portion 7 is set to half the height of the peripheral wall 6, and the bent portion 7 and the peripheral wall 6 constitute a hollow rectangular tube portion.

  A lip piece 7 a extending toward the hollow portion is formed at the tip of the bent portion 7. The lip piece may be formed so as to be in close contact with the peripheral wall 6, or conversely, may be formed so as to overlap the tip portion of the bent portion 7.

  In order to facilitate the sheet metal processing of the bent portion 7, as shown in FIG. 3, a large number of slits 8 are formed in a state of jumping along the crease line in the upper and outer corners of the bent portion 7. (Slits are omitted in other figures). The group of slits 8 can be formed at the connecting portion between the peripheral wall 6 and the bent portion 7 instead of or in addition to the formation at the position shown in the drawing. In addition, the slit 8 is about 10 mm in length, the space | interval of the adjacent slit 10 is about 5 mm, and the front height of the surrounding wall 6 is about 40 mm.

  The support column 2 is formed by bending a metal plate, and includes two inner surface portions 9 that overlap the peripheral wall 6 of the shelf plate 1 from the outside, and a substantially L-shaped outer surface in plan view located outside the inner surface portion 9. The part 10 and a pair of side surface parts 11 connecting both are formed in a substantially hollow L shape. The corner portion of the outer surface portion 10 is formed in an arc shape, and the upper end is closed with a cap 2a. There is a gap between the two inner surface portions 9 constituting the support column 2, but this is for the convenience of bending the outer surface portion 10.

  The end face of the bent portion 7 of the shelf board 1 is set so as to contact the side face part 11 of the support board 2 in a state in which the support pillar 2 is brought into close contact with the corner part of the shelf board 1 from the outside. The thickness dimension T1 and the outward projecting dimension T2 of the bent portion 7 in the shelf board 1 are set to the same dimension (see FIG. 2E). Therefore, in the assembled state, the outer surface of the bent portion 7 in the shelf board 1 and the outer surface portion 10 in the column 2 are continuous in the same plane.

  A portion of the peripheral wall 6 of the shelf 1 that overlaps the column 2 has a mounting hole 14 through which the shaft portion of the bolt 12 passes, while a nut 14 into which the bolt 12 is screwed is provided on the inner surface portion 9 of the column 2. It is fixed by welding. The nut 14 is disposed in the hollow portion of the support column 2, and the inner surface portion 9 has a hole through which the bolt 12 passes.

  When the caster 3 is attached, the metal fitting 15 shown in FIG. 4 is used. That is, the metal fitting 15 has a shape that overlaps the lower surface of the support column 2 and a bottom plate 15a to which the nut 16 is fixed by welding, a main standing piece 15b that overlaps the side surface portion of the support column 2 from the outside, and two sheets that overlap the side surface of the support column 2 And the main upright piece 15 b is fastened to the support column 2 with a bolt 17. A nut 18 into which the bolt 17 is screwed is welded to the inside of the column 2. Needless to say, the bolt 18 provided on the frame of the caster 3 is screwed into the nut 16 welded to the metal fitting 15 from below.

  As shown in FIG. 5, the shelf board 1 can be fixed to the support column 2 in a downward opening posture by turning it upside down. It is also possible to arrange the plurality of shelf boards 1 by changing the posture between an upward opening posture and a downward opening posture.

  In the above configuration, the bent portion 7 of the shelf board 1 protrudes to the outside of the peripheral wall 6, and the column 2 is thick as a whole, and the width dimension of the side face portion 11 is much larger than the plate thickness. As a result, the contact area between the bent portion 7 of the shelf board 1 and the support column 6 is much larger than that of Patent Document 1, and this is a hook-like shape in which the bent portion 7 opens toward the peripheral wall 6. In addition, since the rigidity is remarkably high, the inclination of the support column 2 can be reliably prevented.

  Moreover, since the nut 14 for fixing the shelf board 1 is hidden inside the support column 2, an object is not caught on the nut 14 or touched by a human hand, and the aesthetic appearance is also avoided. Are better.

  Although there is a gap between the two inner surface portions 9 of the support column 2, the support surface 2 is not deformed because the inner surface portion 8 is fixed to the shelf board 1 with the bolts 12. The bent portion 7 of the shelf board 1 may have an inverted L shape, but when the tip is applied to the peripheral wall 6 as in this embodiment, the bent portion 7 and the peripheral wall 6 cooperate with each other. The rugged tubular structure has the advantage that the wagon is more robust.

  In addition, when providing a handle in a wagon, there are many things of a horizontal bar system, but the handle 4 in which the part which a person grasps is a vertical posture like this embodiment is provided separately in the two support | pillars 2 And there is an advantage that it is easy to push and pull the wagon. In other words, since the palms are facing each other in a natural state with both hands extended forward, if the handle is horizontal, the hand is twisted from the natural state to grip the handle (especially, In this embodiment, since the handle 4 can be gripped in a natural posture, the burden on the operator can be reduced.

(2). Other embodiments (FIGS. 6 to 7)
6 and 7 show another embodiment. Of these, the second embodiment shown in FIG. 6 is one in which the support column 2 is an extruded product of a light alloy such as aluminum, and grooves 2b into which tapping screws can be screwed are formed at both ends. The cap and the caster metal fitting can be attached using the groove 2b. Thus, if the support | pillar 2 is made into an extruded product, there exists an advantage which can improve intensity | strength more, and an advantage which can make a nut unnecessary (processing of a female screw hole is required).

  In FIG. 7, 3rd Embodiment which is another example of the bending part 7 in the shelf board 1 is shown. Of these, in the example of (A), the bent portion 7 extends over the entire height of the peripheral wall 6. In the example shown in (B), the bent portion 7 has a trapezoidal hand-like shape in side view with the upper surface being horizontal and the lower surface being inclined.

  In the example of (C), the bent portion 7 has a mountain shape (triangular shape) as viewed from the side, with both the upper surface and the lower surface inclined. As indicated by the alternate long and short dash line in (C), the bent portion 7 can be formed in a trapezoidal shape in which the upper surface and the lower surface are both inclined. In the example shown in (D), the bent portion 7 is substantially semicircular (or oval). As indicated by the alternate long and short dash line, it is also possible to form the peripheral wall 6 so as to extend over the entire height.

  In the example shown to (E), the bending part 7 forms the upper end part and lower end part in the outward convex circular arc shape. Forming in this way has the advantage that the corners are soft and the contact is soft even when touched by a human hand. Further, since there is no edge-like fold, there is an advantage that a slit can be made unnecessary. In addition to these examples, various cross-sectional shapes can be employed, for example, the bent portion 7 can be formed in an M shape when viewed from the side.

(3). Others The present invention can be embodied in various ways other than the above embodiment. For example, the support column is not limited to a hollow shape, but may be a solid structure having a thickness that overlaps with the end surface of the bent portion of the shelf board. Also, the support can be made of resin. A board such as wood or plywood may be stretched on the shelf board. The number of shelves is not limited to three, but may be two or four or more. Further, it is possible to provide a drawer in addition to the shelf board. (A drawer may be attached to the lower surface of the shelf board).

  A shelf board does not necessarily need to be a rectangle, and can also be a polygon such as a circle or an ellipse, or a hexagon or a triangle. It is also possible to form a base portion of the shelf board in a frame shape opened up and down and to stretch a plate such as a plywood board on the frame.

(A) is a perspective view of the entire wagon, and (B) is a partially separated perspective view. It is a figure which shows the detail of a wagon. It is a partial detailed perspective view of a shelf board. It is an isolation | separation perspective view which shows the attachment means of a caster. It is another example figure of the attachment aspect of a shelf board. It is a figure which shows 2nd Embodiment. It is a figure which shows 3rd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shelf board 2 Support | pillar 3 Caster 5 Shelf base 6 Shelf peripheral wall 7 Shelf bending part 8 Slit 9 Inner part of support 10 Outer part of support 11 Side face of support 12 Bolt 13 Mounting hole 14 Nut

Claims (2)

A shelf device comprising a shelf plate made of metal plate and three or more struts to which a plurality of peripheral portions of the shelf plate are fixed with screws,
The shelf board includes a horizontal base portion on which an object is placed, and a peripheral wall extending upward or downward from a peripheral edge of the base portion. The peripheral wall is formed to extend over the entire periphery of the base portion, and each support column is a peripheral wall. It is arranged so as to overlap the outer surface of the shelf, and the peripheral wall of the shelf and the column are fastened with bolts at the overlapping position,
Further, a bent portion having a concave cross-sectional shape is formed on the outer wall of the peripheral wall except for the portion overlapping the support column, and the concave wall is formed toward the peripheral wall. Is in the form of a hollow cylinder, and the end surface of the bent portion is applied to the side surface of the support column.
Shelf equipment. The shelf plate is formed in a square shape in plan view having four corner portions, and a bent portion having a substantially U-shaped cross section that opens toward the peripheral wall is formed in a portion excluding each corner portion. While the bent portion and the peripheral wall form a rectangular tube shape, each support column has an approximately L-shape in plan view having an inner surface portion that overlaps the corner portion of the shelf board from the outside and an outer surface portion that is positioned on the outer surface portion. Is formed in a hollow shape, and the peripheral wall of the shelf and the inner surface of the column are fastened with bolts,
Furthermore, a caster is attached to the lower end of each column.
A wagon as a shelf device according to claim 1.

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