JP4338019B2 - Carriage for transportation - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a transportation carriage used for carrying a load such as a container, and more particularly to a transportation carriage provided with a convex portion for preventing load collapse protruding upward at a side edge of the loading platform. Is.
[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. In addition, a protruding portion is provided on the side edge of the loading platform so as to prevent a load such as a container to be dropped from falling or collapsing. An example of such a carriage is described in Japanese Patent Application Laid-Open No. 11-115766.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 11-115766
[Problems to be solved by the invention]
As described in Patent Document 1, the convex portion of the side edge of the loading platform has rather high corners to prevent the collapse of the container or the like. However, when the cart body is molded from plastic, the following problems arise. That is, when the bulge body, in particular, the convex portion at the side edge of the cargo bed is molded from a solid type resin, although it absorbs the impact relatively strongly, permanent deformation occurs. If permanent deformation occurs on the inside, the container or the like cannot be stored in a predetermined position, so that efficient loading cannot be performed.
[0006]
In addition, when the cart body is molded from foamed resin, there is a problem that the impact absorbing power is weak and it is not deformed but is damaged when subjected to an external impact. In particular, the four corners of the convex portion on the side edge of the cargo bed were most susceptible to impact and were likely to break. If the four corners are damaged, there is a risk of collapsing or dropping, and there is a possibility that it cannot be used as a cart.
[0007]
The present invention has been made in view of the present situation, and even when a cart body provided with a convex portion on a side edge is molded from a solid type resin or a foamed resin, permanent deformation or breakage of the convex portions at the four corners. It is intended to provide a transport cart that prevents the cargo from collapsing.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is configured as follows. That is, the transport cart according to the first invention is a transport cart in which casters are mounted on the bottom surface of the four corners of a flat rectangular cart body , and the cart main body has an entire circumference of a peripheral edge of the flat rectangular cargo platform. Protrusions for preventing load collapse that protrude above the loading platform are provided, and at the upper four corners of the loading platform are formed recesses into which the casters of the upper transport cart are fitted when stacked. Has a through hole for inserting a bolt for fixing a caster pedestal into a long hole in a direction of approximately 45 degrees with respect to the side surface of the cargo bed, and is substantially in the middle of the upper surface in the longitudinal direction and the short direction of the convex portion. When the cart body is stacked in the same direction with each other, a notch recess is provided at the center, and a projecting portion projecting downward is provided at the center of the side edge in the longitudinal and short sides of the loading platform. When the protruding part of the upper bogie body is fitted and the bogie body is cross-stacked, It is formed so that the short side direction of the upper bogie body fits into the notch recess provided in the longitudinal direction of the part, and the protrusion provided in the longitudinal direction fits between the convex parts in the longitudinal direction. Further, the present invention is characterized in that notches are provided at the four corners of the convex portion. Notched portions provided on four corner portions of the convex portion is formed by cutting so as to be positioned above the loading platform and dolphins, it is formed by cutting so as to be bed on the upper surface in the same plane .
[0009]
The resin to be molded may be either a solid type resin or a foamed resin. In this way, by cutting out the four corners of the convex part that has a high risk of collision, permanent deformation does not occur even when molded with solid type resin, and there is a risk of damage due to collision even when molded with foamed resin Less.
[0010]
Further, the carriage body is molded by resin foam, the four corners of the convex portions for stabilizing cargo protruding upward in the carrier side edges may be formed larger radius of the inner surface than Earl outer surface Is preferred .
[0011]
Thus, by forming the inner surface radius larger than the outer radius, the protruding portions of the four corners are thicker than the other portions, and the impact strength is increased. The overall thickness of the convex portion is not increased, but the size of the corners of the four corners is merely made larger on the inner surface than the outer surface, so that the moldability is not affected.
[0012]
In addition, the cart body of the transport cart is composed of a skin layer and a core layer, and a recycled plastic material may be used for the core layer.
[0013]
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 3, the cart body 11 is formed by projecting a protruding 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 mounted on the bottom surface of the four corners of the loading platform 13.
[0014]
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.
[0015]
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 about 45 degrees from the tip of the four corners with respect to the side surface of the loading platform 13. 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.
[0016]
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.
[0017]
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.
[0018]
By fitting the protrusions 30, 30 and the protrusions 31, 31 into the notch recesses 25, 25, 27, 27 on the upper surface of the convex part 15, horizontal displacement is prevented, Even when the cart bodies 11 are stacked on each other, they can be stacked in a stable state without collapsing.
[0019]
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. (See FIG. 4). 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.
[0020]
Next, the shape of the four corners of the convex portion 15 will be described with reference to FIGS. The convex portions 15 are provided to prevent the collapse of the load, but the four corner portions are the portions that are most susceptible to external impacts. Therefore, as shown in FIG. 5, notches 35 are provided at the upper corners of the four corners where the impact is easily received, and the height of the convex portion 15 is partially reduced.
[0021]
The notch 35 is formed in the longitudinal direction and the short direction from the tip of the four corners, and the range thereof is not particularly limited. Moreover, the depth of the notch part 35 can be made into the half or more of the height of the convex-shaped part 15, for example. The side surface of the notch 35 is preferably an inclined surface as shown in the figure.
[0022]
FIG. 6 shows another embodiment of the notch. The notch 36 is formed by removing the convex portions 15 at the four corners so as to be flush with the upper surface of the loading platform 13. Therefore, the four corners of the loading platform 13 protrude. Other configurations are the same as in the case of the notch 35.
[0023]
FIG. 7 shows a main part of the transport carriage according to the second invention, which is reinforced by making the tip part thick without notching the four corners, The case where the radius R1 on the inner surface of the four corners is formed larger than the radius R2 on the outer surface and the tip 37 is thick is shown. Normally, when reinforcing, the entire inner surface of the convex portion 15 is formed to have the same thickness, so that the radius of the inner surface is smaller than the radius of the outer surface. I made it.
[0024]
In order to increase the impact strength, the thickness of the convex portion 15 may be increased as a whole, but if the thickness is increased more than necessary, the moldability deteriorates. Therefore, by reducing the radius of the front end portions of the four corners that are most susceptible to impact on the outer surface side, only the front end portion 37 is thickened and the impact strength is improved without changing the overall thickness of the convex portion 15. I did it. In other words, the strength can be increased without affecting the moldability, and the four corners that are not easily deformed or damaged can be obtained. Further, by setting the outer radius of the corner portion to R3 or more, not only is the handle easy to handle, but also the damage caused when the corner portion hits a human body or an object can be reduced.
[0025]
Any of the cart bodies of the transport cart according to the first invention and the transport cart according to the second invention can have a sandwich structure composed of a skin layer and a core layer. In this case, the cost can be reduced by using a recycled plastic material for the core layer. In addition, the ratio of the core layer to the total thickness of the skin layer and the core layer is reduced by using recycled plastic for the core layer by making the peripheral part smaller than the central part of the cart body. The strength of the cart body can be ensured while aiming.
[0026]
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 and 23 of the lower transport cart. 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.
[0027]
In addition, a so-called cross stacking in which the transport carts 10 are stacked by changing the direction by 90 degrees from each other will be described. In the case of cross-stacking, as shown in FIG. 4, the transport carriage 10 located in the upper portion is provided in the notch recess 25 provided in the longitudinal direction of the convex portion 15 of the transport carriage 10 located in the lower portion. The bottom portion in the short direction is fitted, and the convex portion 15 of the transport carriage 10 located in the lower portion is cross-stacked so as to be located between the wheels of the casters of the transport carriage 10 located in the upper portion. .
[0028]
The transport cart 10 located in the upper part is regulated in horizontal movement in the short 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.
[0029]
【The invention's effect】
As is apparent from the above description, the present invention can provide the following effects. In other words, since the main body of the carriage is provided with convex portions for preventing load collapse that protrude above the cargo bed at the outer edge of the cargo bed, and the cutout portions are provided at the four corners of the convex portion, permanent deformation or breakage due to impact. Can be reduced. In addition, since the radius of the inner surface is formed larger than the radius of the outer surface at the four corners of the convex portion, the corner portion becomes thicker and the impact resistance strength can be increased.
[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.
FIG. 4 is a plan view showing a state in which transport carts according to the present invention are cross-stacked.
FIG. 5 is a perspective view of a principal part showing cutouts at four corners.
FIG. 6 is a perspective view of a principal part showing a cut-out part of another embodiment of the four corner parts.
FIG. 7 is a main part perspective view showing a configuration of convex portions at four corners.
[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: Step portion 30 for manual insertion, 31: Projection 35: Notch 35a: Notch R1: Inner radius R2: Outer radius

Claims (5)

In transport carts with casters attached to the bottom of the four corners of a flat rectangular cart body,
The bogie main body is provided with a convex portion for preventing the collapse of a load projecting above the loading platform on the entire circumference of the peripheral edge of the planar loading platform ,
The upper four corners of the loading platform are formed with recesses into which the casters of the upper transport cart are fitted when stacked, and bolt penetration holes for fixing the caster seats are formed on the side surfaces of the loading platform in the recesses. On the other hand, it is formed in a long hole in the direction of about 45 degrees,
A notch recess is provided in a substantially central part of the upper surface in the longitudinal direction and the short direction of the convex part, and a protruding part protruding downward is provided in the central part of the side edge in the longitudinal direction and the short direction of the cargo bed. When stacked in the same direction as each other, the protruding portion of the upper bogie body fits into the notch recess, and when the bogie body is cross-stacked, the notched recess provided in the longitudinal direction of the convex portion The short side direction of the upper body of the carriage is fitted, and the protrusion provided in the longitudinal direction of the convex part is formed so as to fit between the convex parts in the longitudinal direction,
A carriage for transportation characterized in that notches are provided at the four corners of the convex portion. Notch provided at the four corners, the dolly of claim 1, characterized in that it is formed by a notch Kukoto to be located above the loading platform. Notch provided at the four corners, the dolly of claim 1, characterized in that it is formed by a notch Kukoto to the bed of the upper surface and the same surface. The cart according to any one of claims 1 to 3, wherein the cart body is formed of a solid type resin or a foamed resin. The carriage body according to any one of claims 1 to 4, wherein the carriage body includes a skin layer and a core layer, and a recycled plastic material is used for the core layer .

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