JP4338014B2 - Carriage for transportation - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a carriage used for carrying a loaded object such as a container, and more particularly to a carriage used for a caster that can be easily attached and firmly attached.
[0002]
[Prior art]
Conventionally, transportation carts are used to transport containers and the like at work sites such as supermarkets and department stores. Such a transporting carriage is configured by mounting traveling casters on the lower surface of the four corners of the flat rectangular main body, and by placing a container or the like on the upper surface of the main body of the truck and rolling the casters. It is to be transported.
[0003]
The cart body is mainly molded from plastic, and the casters are fixed by abutting the caster pedestal against the bottom of the four corners of the cart body, inserting bolts into the through holes drilled in the cart body, and tightening the nuts. is doing. Normally, as shown in FIG. 10, bolt holes 3 are provided at four corners of a caster base 2 having a wheel receiver 1, and through holes (not shown) drilled in the cart body in contact with the lower surface of the cart body. Bolts 4 are inserted into the nuts and nuts 5 are screwed together. An example of such a carriage is described in Japanese Patent Application Laid-Open No. 11-105713.
[0004]
Further, as shown in FIG. 11, a base insertion port 6 for inserting one end portion of a caster pedestal in advance is placed on the lower surface of the cart body in advance, and one end portion of the base 2A is inserted into the base insertion port 6, There is a method in which a nut 5A is fastened and fixed to a bolt 4A inserted through a bolt hole 3A provided at the other end.
In addition, when the cart body is molded from plastic, it is necessary to stack and store the molded products of the cart body, but the cart body itself is not formed in a stacked structure. Conventionally, it has only been considered to be stacked as a transport cart assembled by attaching casters to the cart body.
[0005]
[Problems to be solved by the invention]
The use of bolts and nuts when attaching casters to the cart body makes it impossible to run smoothly if the nuts loosen and play occurs between the caster base and the cart body. Further, if the bolts are removed, not only cannot the vehicle run as a carriage, but the load may fall, which is dangerous. In addition, if the number of bolts is large, it takes much time to install the caster, and contamination due to rust occurs. Further, since the cart bodies are not formed in a structure in which the cart bodies are stacked, the cart bodies cannot be stacked in the same direction, requiring a large storage space.
[0006]
The present invention has been made in view of the present situation, and it is an object of the present invention to provide a transportation cart molded so that the casters can be easily attached and the cart main bodies themselves can be stacked on each other at the time of molding.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is configured as follows. That is, the transporting cart according to the present invention is a transporting cart in which casters are mounted on the bottom surfaces of the four corners of a planar rectangular cart body provided with reinforcing ribs on the bottom surface. The cart body has four sides on the side edge of the cargo bed. Protruding portions for preventing load collapse that protrude upward are provided on the entire surface, and notch recesses are respectively provided on the upper surfaces of the convex portions on the four sides, and the notch recesses in the longitudinal direction of the loading platform are arranged in the width direction in the width direction of the loading platform. The caster is a caster provided on the lower surface of the four corners of the cargo bed, with a protruding portion that is formed to be the same as or slightly larger than the four side cutout recesses in the vertical direction and projects below the side edge of the cargo bed. Mounted on the mounting part, the caster mounting part is horizontally spaced by 90 degrees at the four corners of the loading platform to form a gap for inserting the end of the caster base in a nested manner with the lower surface of the reinforcing rib. The protruding piece and the protruding piece Accordingly, two stoppers for positioning the edge of the caster pedestal to be inserted into the formed gap are projected, and a bolt insertion through hole for fixing the caster pedestal between the stoppers is formed from the four corners to the side of the cargo bed. It is formed so as to be a long hole in a direction of approximately 45 degrees .
[0008]
Further, in the transport carriage according to the present invention , a hand insertion step portion may be provided on the convex portion in the short direction of the loading platform. Moreover, it is preferable to provide the caster mounting part with a recess for fitting the caster base.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a transportation cart according to the present invention will be described with reference to the drawings. The transport cart 10 includes a cart body 11 and casters 12 and 12. As shown in FIGS. 1 to 4, the cart body 11 is formed by projecting a convex portion 15 for preventing a collapse of the cargo protruding above the loading platform 13 at the peripheral edge of the planar loading platform 13. Casters 12 and 12 are attached to the bottom surface of the four corners of the loading platform 13.
[00010]
The loading platform 13 is a frame-like body formed by providing substantially trapezoidal through holes 17 and 17 facing each other, and an upper plate 13a having a smooth upper surface and an appropriate direction on the lower surface of the upper plate 13a. It is formed by the reinforcing rib 13b provided in the. Further, the long slots 20 and 20 for handling are provided in the center part of the side end in the longitudinal direction of the cargo bed 13, and the long slots 21 and 21 for handling are provided in the center part of the side end in the short direction. Further, at the four corners of the upper surface of the loading platform 13, there are formed recesses 23, 23 into which casters of the upper transport cart are fitted when stacked.
[0011]
In the illustrated embodiment, the concave portion 23 is formed in a circular plane shape, but may be any shape such as an ellipse or a rectangle. Further, a bolt insertion through hole 24 for fixing the caster base is provided in the recess 23. The bolt insertion through hole 24 is a long hole and is formed in a direction of approximately 45 degrees from the tip of the four corners with respect to the side surface of the loading platform 13, and is provided with a step portion 24a for locking the head of the bolt. Yes. By forming the bolt insertion through hole 24 into a long hole, it is possible to cope with a case where the size of the caster base is changed and the position of the bolt is shifted.
[0012]
Next, notch recesses 25 and 25 are provided on the upper surface in the longitudinal direction of the convex portion 15 for preventing load collapse, and notch recesses 27 and 27 are provided on the upper surface in the lateral direction. In addition, a hand insertion step 29 is provided at substantially the center of one of the notches 27 and 27. The step 29 for manual insertion forms an opening for inserting a hand between the lower cart body 11 and the lower cart body 11 when the lower cart body 11 is taken out of the cart body 11 stored and stacked at the time of molding. Is to do. The manual insertion step 29 can be omitted as appropriate.
[0013]
In addition, projecting portions 30 and 30 projecting downward from the reinforcing rib 13b are provided at the end edge in the longitudinal direction of the loading platform 13, and the end edge in the lateral direction is also below the reinforcing rib 13b. Protruding protrusions 31, 31 are provided. The protrusions 30, 30 and the protrusions 31, 31 are fitted to the notch recesses 25, 25 and 27, 27 on the upper surface of the protrusion 15 when the cart bodies 11 are stacked in the same direction. Are provided in a vertical direction.
[0014]
Since the projections 30, 30 and the projections 31, 31 are fitted into the cutout recesses 25, 25, 27, 27 on the upper surface of the convex part 15, the horizontal displacement is prevented. When stacked on each other, they can be stacked in a stable state without collapsing. Further, the notch recesses 25 on the upper surface of the convex portion 15 are adapted to fit the upper carriage main body 11 when the carriages 10 are stacked by changing the direction by 90 degrees relative to each other, so-called cross stacking. Is formed. Therefore, the notch recesses 25 are formed to be the same as or slightly larger than the dimensions of the cart body 11 in the short direction.
[0015]
Reference numeral 33 in FIGS. 1 and 3 denotes a printing concave portion provided on the outer surface in the longitudinal direction of the convex portion 15. The printing concave portion 33 may be provided on the outer surface in the short direction of the convex portion 15, or may be omitted without being provided on any outer surface of the convex portion. In addition, the convex portion 15 for preventing the collapse of the load may not be provided on the entire circumference of the cargo bed, and either one of the convex portions in the short direction may be omitted. When either one of the convex portions in the short direction is omitted, loading can be easily performed.
[0016]
Next, the mounting structure of the caster 12 will be described based on FIG. 2, FIG. 5 and FIG. The caster mounting portion 35 includes projecting pieces 40 and 40 that form a gap 39 for inserting the caster base 37 in a nested manner between the lower surface of the reinforcing ribs 13b and stoppers 41 and 41 that position and fix the caster base 37. ing.
[0017]
The projecting pieces 40 are projected horizontally inward at the four corners of the loading platform 13, and a gap 39 is formed between the projecting pieces 40 and 40 and the lower surface of the reinforcing rib 13b. As shown in FIG. 2, the projecting pieces 40 and 40 are provided two by two along the side surface of the loading platform 13, but may be one or two or more. The stoppers 41 and 41 are formed in accordance with the shape of the caster pedestal 37 in order to position the inner end face of the caster pedestal 37 inserted into the gap 39.
[0018]
Since the stoppers 41 and 41 are for positioning the caster base 37, the stoppers 41 and 41 are formed so as to surround the bolt insertion through holes 24. That is, as shown in FIG. 2, the bolt insertion through holes 24 are formed from the intersections on the lines of the stoppers 41, 41 toward the four corner tips of the loading platform, in other words, with respect to the side surface of the loading platform. It is provided on a line of about 45 degrees from the four corner tips.
[0019]
The caster mounting portion 35 is not limited to the above embodiment, the stopper 41 is omitted, the portion of the reinforcing rib with which the caster pedestal 37 abuts is formed in a recessed step, and the caster pedestal 37 is You may comprise so that it may fit in a step part.
[0020]
Next, a method for mounting the caster 12 to the caster mounting portion 35 will be described. First, the upper surface of the caster pedestal 37 is brought into contact with the lower surface of the reinforcing rib 13b (upper surface in the left half of FIG. 2), and the end of the caster pedestal 37 is slid toward the tip of the four corners from the direction of the stopper 41. Insert into. When the end portion of the caster pedestal 37 is inserted into the gap 39 and abutted, the other end portion is positioned in the stopper 41, so that the caster base 37 is fitted in the stopper 41 as it is. The caster 12 is fixed to the caster mounting portion 35 by fitting the caster base 37 into the stopper 41.
[0021]
Further, the bolt 43 may be inserted into the bolt insertion through hole 24 of the loading platform 13 and the bolt hole of the caster base 37, and the nut 45 may be screwed and tightened (see FIG. 7). Since the bolt insertion through hole 24 is formed as a long hole, the bolt can be easily inserted even if the position of the caster base 37 is slightly deviated. Since the bolt insertion through hole 24 has the above-described configuration, the two sides of the caster base 37 are fixed by the projecting piece 40, and it is sufficient to stop the shift with one bolt.
[0022]
Therefore, not only can the caster be attached easily, but also contamination due to the occurrence of rust can be minimized. Further, since the caster base 37 is inserted into the gap 39 and sandwiched by the projecting piece 40 and is fitted in the stopper 41, the caster itself can be removed immediately even if the bolt is dropped. There is no safety and safety is improved. That is, the caster pedestal mounting portion 35 is configured not only to be able to easily mount the caster pedestal 33 but also difficult to come off.
[0023]
When the transport carts 10 having the above-described configuration are stacked in the same direction, they are placed so that the wheels of the casters 12 of the upper transport cart 10 are fitted in the recesses 23, 23 of the lower transport cart ( (See FIG. 7). At this time, when the tread of the wheel is formed to be curved, the cross sections of the recesses 23 and 23 may be formed in accordance with the curvature of the tread. Thus, when the wheel of the caster 12 of the transport carriage 10 located in the upper part is fitted into the recess 23 of the transport carriage 10 located in the lower part, the wheels do not rotate, and a large number of them are stable. Can be stacked.
[0024]
Next, so-called cross stacking, in which the transport carts 10 are stacked with their directions changed by 90 degrees, will be described. When the transport cart 10 is cross-stacked, as shown in FIGS. 8 and 9, the transport cart positioned at the upper portion is provided in the notch recess 25 provided in the longitudinal direction of the protruding portion 15 of the transport cart 10 positioned at the lower portion. 10 is fitted in the bottom portion in the short direction, and the convex portion 15 of the transport carriage 10 located in the lower portion is positioned between the caster wheels of the transport cart 10 located in the upper portion. To do.
[0025]
The transport cart 10 located in the upper part is regulated in horizontal movement in the longitudinal direction by a notch recess 25 formed in the convex part 15 of the transport cart 10 located in the lower part. It will be controlled by latching to the convex part 15 of the carriage 10 located in the position, and can be cross-stacked in a stable state.
[0026]
【The invention's effect】
As is apparent from the above description, the present invention can provide the following effects. That is, the carriage main body is provided with a convex portion for preventing load collapse that protrudes above the cargo bed at the outer edge of the cargo bed, and a notch recess is formed on the upper surface of the convex portion, and the notch is formed at the outer edge of the cargo bed. Since the downward projecting portion that fits into the recess is formed, the cart body does not collapse even when stacked in the same direction during molding, and can be safely stored and transported.
Further, among the cutout recesses, when the cutout recess in the longitudinal direction is formed to be approximately the same as or slightly larger than the size of the cart body in the short direction, the directions of the transport carts are changed by 90 degrees relative to each other. They can be stacked, so-called cross-stacked. In addition, a caster mounting portion is provided on the bottom surface of the four corners of the cart body, and the caster mounting portion projects a projecting piece inwardly from an adjacent side edge of the bottom surface of the four corners of the cart body, and between the bottom surface of the cargo bed. A gap for inserting the caster base is formed, and one fixing bolt insertion through hole is provided. Therefore, the caster can be easily mounted, and the risk of the caster falling off due to the loosening of the bolt can be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view of a transport carriage according to the present invention.
FIG. 2 is a plan view of the right half and a bottom view of the left half.
3 is a cross-sectional view taken along line AA in FIG. 2, and the left half is a front view.
4 is a cross-sectional view taken along line BB in FIG. 2, and the left half is a side view.
5 is an enlarged cross-sectional view taken along the line CC in FIG.
6 is an enlarged sectional view taken along line DD in FIG. 2. FIG.
FIG. 7 is an enlarged explanatory view showing a cross section of the main part in a state where the caster is mounted on the caster mounting part.
FIG. 8 is a plan view showing a state in which transport carts according to the present invention are cross-stacked.
FIG. 9 is also a front view showing a state in which transport carts according to the present invention are cross-stacked.
FIG. 10 is an explanatory perspective view showing a conventional caster mounting method.
FIG. 11 is an explanatory perspective view showing another conventional caster mounting method.
[Explanation of symbols]
10: Carriage for transport 11: Car body 12: Caster 13: Loading platform 13a: Upper plate 13b: Reinforcing rib 15: Convex portion 17: Substantially trapezoidal through-hole 20, 21: Long hole for handle 23: Recess 24: Bolt insertion Through hole 25, 27: Notch recess 29: Hand insertion step 30, 31: Projection 33: Printing recess 35: Caster mounting part 37: Caster base 39: Caster 40: Projection piece 41: Stopper 43: Bolt 45 :nut

Claims (3)

In a transport cart in which casters are mounted on the bottom surfaces of the four corners of a flat rectangular cart body provided with reinforcing ribs on the bottom surface, the cart body is used for preventing collapse of the cargo that protrudes upward over the entire four sides of the side edge of the cargo platform. Protruding portions are provided, and notch recesses are respectively provided on the upper surfaces of the convex portions on the four sides, and the notch recesses in the longitudinal direction of the loading platform are formed to be the same as or slightly larger than the width dimension in the lateral direction of the loading platform, A projecting portion that overlaps the cutout recesses on the four sides in the vertical direction protrudes below the side edge of the side, and the caster is mounted on a caster mounting portion provided on the bottom surface of the four corners of the cargo bed, The caster mounting portion is provided with protrusions forming a gap for inserting the end of the caster pedestal in a nested manner between the lower surface of the reinforcing ribs and protruding horizontally at 90 degrees at the four corners of the loading platform. Insert into the formed gap Two stoppers for positioning the edge of the caster pedestal are projected, and bolt insertion holes for fixing the caster pedestal between the stoppers are extended in the direction of approximately 45 degrees from the four corners to the side of the cargo bed. A transport cart characterized by being formed to be a hole . 2. The transport carriage according to claim 1 , wherein a hand insertion step is provided on the convex portion in the short direction of the loading platform . The carriage according to claim 1 or 2, wherein a recess for fitting the caster base is provided in the caster mounting portion .

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