JP2000043734A - Stackable truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the stacking height, and to stably stack trucks by attaching two each forward and rear casters close to both ends along forward and rear edges with different intervals symmetrically in the right-to-left direction, and forming two each forward and rear openings symmetrical to these casters. SOLUTION: Rear casters 21, 22 and forward casters 23, 24 are attached close to both ends along a rear edge 11 and a forward edge 12 of a base plate 1 symmetrically in the right-to-left direction, and the interval x between the rear casters 21, 22 is set to be larger than the interval y between the forward casters 23, 24. Rear openings 31, 32 piercing through the base plate 1 are formed at the center-to-center symmetrical position to the forward casters 23, 24 on inner parts of the rear casters 21, 22, and forward openings 33, 34 piercing through the base plate 1 are formed at the center-to-center symmetrical position to the rear casters 2, 22 on outer parts of the forward casters 23, 24. When trucks are stacked, an upper truck is inverted and placed on a lower truck, and the casters 21-24 are dropped into the openings 31-34.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stacked truck.

[0002]

2. Description of the Related Art A trolley is constructed by attaching a plurality of casters to a rectangular quadrangular base plate. The number of casters attached to one truck is three or six, but four is overwhelmingly large. Moreover, when there are four casters, the casters are often mounted at four corners of the base plate at symmetrical positions. Therefore, in the conventional caster, two rear casters are attached symmetrically near both ends along the rear edge on a rectangular quadrangular base plate, and two rear casters are symmetrically formed near both ends along the front edge. The front casters were attached, and the interval between the rear casters and the interval between the front casters were made equal. Therefore, all four casters were to be provided near the four corners of the base plate at symmetrical positions in the front-rear and left-right directions.

A trolley is useful when carrying luggage, but when not carrying luggage, it only occupies a large area, and therefore becomes an obstacle. Therefore, it is desirable that the cart can be folded or stacked when not in use. However, if it can be folded, it will be necessary to assemble it when necessary, and it will take time and effort to assemble. Therefore, it is most convenient to stack the carts when they are not needed.

[0004] In the conventional bogie, four casters are provided on the base plate at symmetrical positions in the front-rear and left-right directions as described above.
When the bogies are stacked, the casters of the upper bogie will be directly above the caster mounting portions of the lower bogie. So, the stacking trolley so far, as shown in Figure 1,
The upper surface of the base plate A corresponding to the caster mounting portion is recessed to form a depression B, and the casters of the upper carriage are dropped into the depression B, thereby facilitating the stacking of the carriages. However, depending on this structure, the number of trolleys that can be stacked is limited, so that the trolleys cannot be efficiently stacked. The reason is as follows.

[0005] In a truck having a structure as shown in Fig. 1, when the trucks are stacked, they cannot be in a stable state. This is because the caster dropped into the depression can still slightly move in the depression B. In addition, since the depth of the depression B cannot be increased, even if the caster falls into the depression, the height of the stack does not change much. Therefore, the stacked state becomes more unstable. Therefore, this trolley can barely stack only about 5 cars.
There is a risk that the stacked carts will collapse. As described above, there has been a drawback that the conventional stacking carts cannot be efficiently stacked.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks. That is,
An object of the present invention is to provide a truck capable of stacking stably because the upper truck does not move on the lower truck when stacked, and the height of the stack can be reduced.

[0007]

SUMMARY OF THE INVENTION The present inventor has changed the arrangement of the casters on the base plate so that the casters of the upper bogie do not come directly above the casters of the lower bogie when the bogies are stacked. The casters would fall through the base plate of the lower bogie to reduce the height of the stack, thereby stabilizing the stack.

For this purpose, the inventor of the present invention arranged two rear casters along a rear edge of a rectangular quadrangular base plate, and mounted two front casters along a front edge opposed to the rear edge. However, in this case, the front casters are positioned closer to the inside, the spacing between the rear casters is larger than the spacing between the front casters, and the base plate is mounted on the outside adjacent to the front casters, In addition to providing a penetrating front opening for dropping the front casters, a penetrating rear opening for dropping the front casters is provided inside adjacent to the rear casters.

At the time of stacking, the upper cart is turned upside down and placed on the lower cart. That is, the rear caster and the front caster of the upper bogie are dropped into the front opening and the rear opening of the lower bogie, respectively, such that the rear edge of the upper bogie is located above the front edge of the lower bogie, thereby stacking. Was determined to be stable.

The present invention relates to a rectangular quadrangular base plate,
Two rear casters are provided symmetrically near both ends along the rear edge, and a rear opening is provided in an inner portion adjacent to each rear caster so as to penetrate the base plate, and along a front edge facing the rear edge. Two front casters are attached at positions symmetrical with the rear opening, and two front openings penetrating through the base plate at the outer portion adjacent to each front caster are formed symmetrically with the rear caster. And the rear opening and the front opening are sized to allow the front casters and the rear casters to pass through, respectively.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION In the truck according to the present invention, the base plate can be made of various materials. For example, the base plate can be made of wood, metal plate, or hard synthetic resin. A steel plate, a stainless steel plate, or an aluminum plate can be used as the metal plate.

An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 2 is a bottom view of the truck according to the present invention when the platform plate is made of metal. FIG. 3 is a perspective view of a stopper used in the cart shown in FIG. FIG. 4 is a side view showing a stacked state of the carts shown in FIG. FIG. 5 is a bottom view of the carriage according to the present invention when the base plate is made of a hard synthetic resin.
FIG. 6 is a sectional view taken along the line AA 'of the cart shown in FIG. FIG. 7 is a BB ′ end view of the cart shown in FIG. 5. FIG.
FIG. 6 is a sectional view taken along the line CC ′ of the cart shown in FIG. 5.

In FIG. 2, reference numeral 1 denotes a rectangular quadrangular base plate. Reference numeral 11 denotes a rear edge of the base plate 1, and reference numeral 12 denotes a front edge of the base plate 1, which is an edge facing the rear edge 11. Reference numerals 21 and 22 denote rear casters, which are provided symmetrically near both ends along the rear edge 11 of the base plate 1. Reference numerals 23 and 24 denote front casters, which are provided symmetrically along the front edge 12 of the base plate 1. Front casters 23 and 24
Is located near the center of the front edge 12. Therefore, the interval x between the rear casters 21 and 22 is larger than the interval y between the front casters 23 and 24.

In the inner portion adjacent to the rear casters 21 and 22, rear openings 31 and 32 penetrating the base plate 1 are provided, respectively. Here, the term “adjacent” means that, for example, when the opening 31 is described, the opening 31 is brought as close as possible to the caster 21. It is to stabilize the cart.

In FIG. 2, for example, casters 21
It seems that there is a wide gap between the opening 31 and the opening 31. This is because the mounting substrate of the caster 21 projects outward to the position indicated by the dotted line, so that there is only a gap due to this substrate. . In practice, the opening 31 is as close as possible to the casters 21. In this case, the casters 21 are used to secure the trailing edge 11 to secure the stability of the cart.
Are provided as close to both ends as possible.

Front casters 23 and 2 along leading edge 12
4 is provided at a position symmetrical with the rear openings 31 and 32, respectively. To be more precise, the front casters 23 and 24 are provided at positions such that their outer ends 231 and 241 are symmetrical with the outer edge 131 of the opening 31 and the outer edge 321 of the opening 32. As a centrally symmetric relationship. From another viewpoint, this position is that the front casters 23 and 24 are on the axis extending in the front-rear direction of the rear openings 32 and 31, respectively, and occupy the front-rear symmetric position. Will be.

In the outer part adjacent to the front casters 23 and 24, two front openings 3 each penetrating the base plate 1 are provided.
3 and 34 are attached. In this case, the front openings 33 and 3
4 is provided at a position symmetrical to the center of the rear casters 21 and 22, respectively. Therefore, the front openings 33 and 34 lie on the axis extending in the front-rear direction of the rear casters 22 and 21 and occupy symmetrical positions in the front-rear direction.
Can be said.

Since the rear openings 31 and 32 are for dropping the front casters 23 and 24, respectively, they are large enough to drop the respective casters. Similarly, the front opening 33
And 34 are for dropping the rear casters 21 and 22, respectively, and therefore have a size large enough to drop the respective casters.

There are fixed casters and swivel casters. The fixed caster has a fixed traveling direction, and the adjustable caster has a traveling direction that can be freely changed. In the present invention, any of them can be used. Preferred among them is
Referring to the bogie shown in FIG. 2, a free caster is used for a rear caster, and a fixed caster is used for a front caster.

If the casters are free casters, the width of the casters will vary slightly depending on the direction in which the wheels face, so the size of the opening must be somewhat large enough to allow the casters to drop. However,
In the case where a universal caster is provided, the direction of the wheels of the universal caster is adjusted to some extent before stacking, so that the margin does not need to be particularly large.

Normally, the front casters 23 and 24 and the rear casters 21 and 22 have the same wheel size, so that the rear openings 31 and 32 and the front openings 33 and 3 are used.
4 is the same size.

The base plate 1 has two stoppers 41, 42 and 43, 44 along the rear edge 11 and the front edge 12, respectively.
And as far as possible from each other. This stopper is for stopping the upper bogie from dropping so that when the bogies are stacked, the lower end of the stopper hits the base plate of the lower bogie and the upper bogie does not fall below it.

The stoppers 41 to 44 used in FIG.
Are shown in FIG. 3 in which a metal plate is bent into a slightly open U-shape, and the open end of the U-shape is further bent almost vertically outward to form an Ω-shaped cross section. It is. The height at which the stopper projects from the base plate 1 is smaller than the height at which the casters project from the base plate, and is at least half the height at which the casters project from the base plate.

When the bogies shown in FIG. 2 are stacked, the upper bogie is turned upside down and placed on the lower bogie so that the front edge 12 of the upper bogie is located above the rear edge 11 of the lower bogie. Then, as shown in FIG. 4, the front casters 23 and 24 of the upper bogie become the rear opening 31 of the lower bogie, respectively.
32, and the rear casters 21,
22 fall into the front openings 33 and 34 of the lower bogie respectively, and the stoppers 41 to 44 of the upper bogie collide with the base plate 1 of the lower bogie and stop. Therefore, the stacked height is reduced by the distance H from the lower end of the caster to the lower end of the stopper. Further, since the stopper is in contact with the base plate, the upper bogie cannot move on the lower bogie.
Therefore, it can be stacked in a stable state with a low bulk.

The spill stopper 51 is erected along the front edge and the spill stopper 52 is erected along the side edge of the bogie shown in FIG. 4, so that the spill stopper is provided in a U-shaped frame as a whole. did. Each of these spill stoppers 51 and 52 is
This is to prevent the luggage placed on the car from leaking out of the base plate 1 and falling off. The spill stopper is also provided along the trailing edge.
A hanging piece is provided which hangs from the trailing edge in a direction opposite to that of 1, 52,
It is desirable to be able to move up and down along the hanging piece and to be able to fix it with a thumb screw or the like at a required place.

As described above, the rear casters 21,
22 and the front casters 23 and 24 usually have the same size. In this case, the front openings 33 and 34 and the rear openings 31 and 32 have the same size. Opening 31
It is preferable to gently bend the peripheral edge of the base plate 34 downward to facilitate dropping of the casters and to reinforce the base plate 1. In addition, it is preferable that a hole 61 is formed in a central portion along the rear edge 11 and a hole 62 is also formed in a central portion along the front edge 12 to form a grip portion for holding a carriage.

The bogie shown in FIGS. 2 to 4 is suitable for making the base plate 1 of metal, especially steel plate. Note that the terms "front" and "rear", such as "front edge" and "rear edge", "rear casters" or "front casters", are used to describe the structure of the bogie based on these drawings. However, "before" and "after" here have no absolute meaning so that there is no distinction between front and rear movements of the bogie. Therefore, the interchange of "before" and "after" also falls within the scope of the present invention.

FIG. 5 shows an example of a bogie when the bogie according to the present invention is made of synthetic resin. The cart in FIG.
The only difference from the cart shown in FIGS. 2 to 4 is that the rectangular quadrangular base plate 1 is made of synthetic resin, and the other relationships are completely the same as those shown in FIGS. 2 to 4. Is the same. That is, two rear casters 21 and 22 are symmetrically arranged near both ends along the rear edge 11.
And rear openings 31 and 32 penetrating through the base plate 1 are provided in an inner portion adjacent to the respective rear casters 21 and 22. Also, along the front edge 12, the rear opening 3
Front casters 23 and 24 are symmetrical with 1 and 32
At the outer portion adjacent to the front casters 23 and 24, front openings 33 and 34 penetrating the base plate 1 are provided.
It is attached at a position symmetrical with the center of the rear casters 21 and 22.

In FIG. 5, when the base plate 1 is made of resin, it is preferable that a part of the base plate 1 be hollow. For example, FIG. 6 shows a cross section of the cart shown in FIG. 5 taken along the line AA '.
It is preferable that two synthetic resin plates oppose each other at a fixed interval in the central portion of the base plate 1 existing between the base plate 1 and the base plate 1 and have a hollow 6 inside. In this case, the caster 23
The parts to which are attached are formed by laminating the two synthetic resin plates. The front openings 33 and 34 on the outside are holes, and the outside is a hollow 6 like the above-mentioned central portion.

FIG. 7 shows an end surface shape of the bogie of FIG. 5 cut along the line BB '. In FIG.
The U-shaped recess 71 provided on the lower surface is provided to reinforce the base plate 1, and the U-shaped recess 71 is provided at the bottom of the recess 71.
The two synthetic resin plates are bonded together to form an integral unit. The central hole 72 is used as a grip when the base plate 1 is held by hand.

FIG. 8 shows a cross-sectional shape of the bogie shown in FIG. 5 taken along the line CC '. In FIG.
Most of the base plate 1 is hollow 6
Only the portion 54 provided with 3 is solid. The spill stopper 53 is detachably screwed to the portion 54. The base plate 1 is provided with a stopper 42. The stopper 42 is provided not only on the rear edge 11 side but also on the front edge 12
It is also attached to the side.

[0032]

According to the present invention, in a rectangular quadrilateral base plate, two rear casters are attached symmetrically near both ends along the rear edge, and the base plate is provided on an inner portion adjacent to each rear caster. Two rear casters are provided along the front edge and symmetrically with the rear opening above the front edge, and two base plates penetrate the base plate in an outer portion adjacent to the front casters. The front opening is attached to the center of symmetry with the rear caster, so if the same cart is turned upside down and stacked, the rear caster will be directly above the front opening, and at the same time, the front caster will be Will be on top. In that case, since the rear opening and the front opening were large enough to allow the front casters and the rear casters to pass through, respectively, the front casters were fitted into the rear openings, and the rear casters were inserted into the front openings. It will fit. Therefore, the height of the stack is very low, and the stack can be stably performed.

In this case, when a stopper is protruded from the base plate on the side where the casters are provided, and the protrusion height of the stopper from the base plate is equal to or less than the caster protrusion height and is equal to or more than half of the caster protrusion height. Since the upper trolley is fixed on the lower trolley, the upper trolley is stably fixed on the lower trolley. In particular, when two stoppers protrude along a pair of opposing edges, the upper bogie is more stably fixed on the lower bogie. The present invention has such an effect.

[Brief description of the drawings]

FIG. 1 is a perspective view of a conventional stacked cart.

FIG. 2 is a bottom view of the stacking cart according to the present invention.

FIG. 3 is a perspective view of a stopper used in the cart shown in FIG. 2;

FIG. 4 is a side view showing a stacked state of the carts shown in FIG. 2;

FIG. 5 is a bottom view of another stacked truck according to the present invention.

FIG. 6 is a sectional view taken along the line AA ′ of the cart shown in FIG. 5;

FIG. 7 is a BB ′ end view of the cart shown in FIG. 5;

FIG. 8 is a sectional view taken along the line CC ′ of the cart shown in FIG. 5;

[Explanation of symbols]

 Reference Signs List 1 base plate 11 rear edge 12 front edge 21, 22 rear caster 23, 24 front caster 31, 32 rear opening 33, 34 front opening 41, 42, 43, 44 stopper 51, 52 spill stop 61, 62, 72 hole 6 hollow 71 hollow

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] August 10, 1998 (1998.8.1)
0)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Detailed description of the invention

[Correction method] Change

[Correction contents]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stacked truck.

[0002]

2. Description of the Related Art A trolley is constructed by attaching a plurality of casters to a rectangular quadrangular base plate. The number of casters attached to one truck is three or six, but four is overwhelmingly large. Moreover, when there are four casters, the casters are often mounted at four corners of the base plate at symmetrical positions. Therefore, in the conventional caster, two rear casters are attached symmetrically near both ends along the rear edge on a rectangular quadrangular base plate, and two rear casters are symmetrically formed near both ends along the front edge. The front casters were attached, and the interval between the rear casters and the interval between the front casters were made equal. Therefore, all four casters were to be provided near the four corners of the base plate at symmetrical positions in the front-rear and left-right directions.

A trolley is useful when carrying luggage, but when not carrying luggage, it only occupies a large area, and therefore becomes an obstacle. Therefore, it is desirable that the cart can be folded or stacked when not in use. However, if it can be folded, it will be necessary to assemble it when necessary, and it will take time and effort to assemble. Therefore, it is most convenient to stack the carts when they are not needed.

[0004] In the conventional bogie, four casters are provided on the base plate at symmetrical positions in the front-rear and left-right directions as described above.
When the bogies are stacked, the casters of the upper bogie will be directly above the caster mounting portions of the lower bogie. So, the stacking trolley so far, as shown in Figure 1,
The upper surface of the base plate A corresponding to the caster mounting portion is recessed to form a depression B, and the casters of the upper carriage are dropped into the depression B, thereby facilitating the stacking of the carriages. However, depending on this structure, the number of trolleys that can be stacked is limited, so that the trolleys cannot be efficiently stacked. The reason is as follows.

[0005] In a truck having a structure as shown in Fig. 1, when the trucks are stacked, they cannot be in a stable state. This is because the caster dropped into the depression can still slightly move in the depression B. In addition, since the depth of the depression B cannot be increased, even if the caster falls into the depression, the height of the stack does not change much. Therefore, the stacked state becomes more unstable. Therefore, this trolley can barely stack only about 5 cars.
There is a risk that the stacked carts will collapse. As described above, there has been a drawback that the conventional stacking carts cannot be efficiently stacked.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks. That is,
An object of the present invention is to provide a truck capable of stacking stably because the upper truck does not move on the lower truck when stacked, and the height of the stack can be reduced.

[0007]

SUMMARY OF THE INVENTION The present inventor has changed the arrangement of the casters on the base plate so that the casters of the upper bogie do not come directly above the casters of the lower bogie when the bogies are stacked. The casters would fall through the base plate of the lower bogie to reduce the height of the stack, thereby stabilizing the stack.

For this purpose, the inventor of the present invention arranged two rear casters along a rear edge of a rectangular quadrangular base plate, and mounted two front casters along a front edge opposed to the rear edge. However, in this case, the front casters are positioned closer to the inside, the spacing between the rear casters is larger than the spacing between the front casters, and the base plate is mounted on the outside adjacent to the front casters, In addition to providing a penetrating front opening for dropping the front casters, a penetrating rear opening for dropping the front casters is provided inside adjacent to the rear casters.

At the time of stacking, the upper cart is turned upside down and placed on the lower cart. That is, the rear caster and the front caster of the upper bogie are dropped into the front opening and the rear opening of the lower bogie, respectively, such that the rear edge of the upper bogie is located above the front edge of the lower bogie, thereby stacking. Was determined to be stable.

The present invention relates to a rectangular quadrangular base plate,
Two rear casters are provided symmetrically near both ends along the rear edge, and a rear opening is provided in an inner portion adjacent to each rear caster so as to penetrate the base plate, and along a front edge facing the rear edge. Two front casters are attached at positions symmetrical with the rear opening, and two front openings penetrating through the base plate at the outer portion adjacent to each front caster are formed symmetrically with the rear caster. And the rear opening and the front opening are sized to allow the front casters and the rear casters to pass through, respectively.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION In the truck according to the present invention, the base plate can be made of various materials. For example, the base plate can be made of wood, metal plate, or hard synthetic resin. A steel plate, a stainless steel plate, or an aluminum plate can be used as the metal plate.

An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 2 is a bottom view of the truck according to the present invention when the platform plate is made of metal. FIG. 3 is a perspective view of a stopper used in the cart shown in FIG. FIG. 4 is a side view showing a stacked state of the carts shown in FIG. FIG. 5 is a bottom view of the carriage according to the present invention when the base plate is made of a hard synthetic resin.
FIG. 6 is a sectional view taken along the line AA 'of the cart shown in FIG. FIG. 7 is a BB ′ end view of the cart shown in FIG. 5. FIG.
FIG. 6 is a sectional view taken along the line CC ′ of the cart shown in FIG. 5.

In FIG. 2, reference numeral 1 denotes a rectangular quadrangular base plate. Reference numeral 11 denotes a rear edge of the base plate 1, and reference numeral 12 denotes a front edge of the base plate 1, which is an edge facing the rear edge 11. Reference numerals 21 and 22 denote rear casters, which are provided symmetrically near both ends along the rear edge 11 of the base plate 1. Reference numerals 23 and 24 denote front casters, which are provided symmetrically along the front edge 12 of the base plate 1. Front casters 23 and 24
Is located near the center of the front edge 12. Therefore, the interval x between the rear casters 21 and 22 is larger than the interval y between the front casters 23 and 24.

In the inner portion adjacent to the rear casters 21 and 22, rear openings 31 and 32 penetrating the base plate 1 are provided, respectively. Here, the term “adjacent” means that, for example, when the opening 31 is described, the opening 31 is brought as close as possible to the caster 21. It is to stabilize the cart.

In FIG. 2, for example, casters 21
It seems that there is a wide gap between the opening 31 and the opening 31. This is because the mounting substrate of the caster 21 projects outward to the position indicated by the dotted line, so that there is only a gap due to this substrate. . In practice, the opening 31 is as close as possible to the casters 21. In this case, the casters 21 are used to secure the trailing edge 11 to secure the stability of the cart.
Are provided as close to both ends as possible.

Front casters 23 and 2 along leading edge 12
4 is provided at a position symmetrical with the rear openings 31 and 32, respectively. To be more precise, the front casters 23 and 24 are provided at positions such that their outer ends 231 and 241 are symmetrical with the outer edge 131 of the opening 31 and the outer edge 321 of the opening 32. As a centrally symmetric relationship. From another viewpoint, this position is that the front casters 23 and 24 are on the axis extending in the front-rear direction of the rear openings 32 and 31, respectively, and occupy the front-rear symmetric position. Will be.

In the outer part adjacent to the front casters 23 and 24, two front openings 3 each penetrating the base plate 1 are provided.
3 and 34 are attached. In this case, the front openings 33 and 3
4 is provided at a position symmetrical to the center of the rear casters 21 and 22, respectively. Therefore, the front openings 33 and 34 lie on the axis extending in the front-rear direction of the rear casters 22 and 21 and occupy symmetrical positions in the front-rear direction.
Can be said.

Since the rear openings 31 and 32 are for dropping the front casters 23 and 24, respectively, they are large enough to drop the respective casters. Similarly, the front opening 33
And 34 are for dropping the rear casters 21 and 22, respectively, and therefore have a size large enough to drop the respective casters.

There are fixed casters and swivel casters. The fixed caster has a fixed traveling direction, and the adjustable caster has a traveling direction that can be freely changed. In the present invention, any of them can be used. Preferred among them is
Referring to the bogie shown in FIG. 2, a free caster is used for a rear caster, and a fixed caster is used for a front caster.

If the casters are free casters, the width of the casters will vary slightly depending on the direction in which the wheels face, so the size of the opening must be somewhat large enough to allow the casters to drop. However,
In the case where a universal caster is provided, the direction of the wheels of the universal caster is adjusted to some extent before stacking, so that the margin does not need to be particularly large.

Normally, the front casters 23 and 24 and the rear casters 21 and 22 have the same wheel size, so that the rear openings 31 and 32 and the front openings 33 and 3 are used.
4 is the same size.

The base plate 1 has two stoppers 41, 42 and 43, 44 along the rear edge 11 and the front edge 12, respectively.
And as far as possible from each other. This stopper is for stopping the upper bogie from dropping so that when the bogies are stacked, the lower end of the stopper hits the base plate of the lower bogie and the upper bogie does not fall below it.

The stoppers 41 to 44 used in FIG.
Are shown in FIG. 3 in which a metal plate is bent into a slightly open U-shape, and the open end of the U-shape is further bent almost vertically outward to form an Ω-shaped cross section. It is. The height at which the stopper projects from the base plate 1 is smaller than the height at which the casters project from the base plate, and is at least half the height at which the casters project from the base plate.

When the bogies shown in FIG. 2 are stacked, the upper bogie is turned upside down and placed on the lower bogie so that the front edge 12 of the upper bogie is located above the rear edge 11 of the lower bogie. Then, as shown in FIG. 4, the front casters 23 and 24 of the upper bogie become the rear opening 31 of the lower bogie, respectively.
32, and the rear casters 21,
22 fall into the front openings 33 and 34 of the lower bogie respectively, and the stoppers 41 to 44 of the upper bogie collide with the base plate 1 of the lower bogie and stop. Therefore, the stacked height is reduced by the distance H from the lower end of the caster to the lower end of the stopper. Further, since the stopper is in contact with the base plate, the upper bogie cannot move on the lower bogie.
Therefore, it can be stacked in a stable state with a low bulk.

The spill stopper 51 is erected along the front edge and the spill stopper 52 is erected along the side edge of the bogie shown in FIG. 4, so that the spill stopper is provided in a U-shaped frame as a whole. did. Each of these spill stoppers 51 and 52 is
This is to prevent the luggage placed on the car from leaking out of the base plate 1 and falling off. The spill stopper is also provided along the trailing edge.
A hanging piece is provided which hangs from the trailing edge in a direction opposite to that of 1, 52,
It is desirable to be able to move up and down along the hanging piece and to be able to fix it with a thumb screw or the like at a required place.

As described above, the rear casters 21,
22 and the front casters 23 and 24 usually have the same size. In this case, the front openings 33 and 34 and the rear openings 31 and 32 have the same size. Opening 31
It is preferable to gently bend the peripheral edge of the base plate 34 downward to facilitate dropping of the casters and to reinforce the base plate 1. In addition, it is preferable that a hole 61 is formed in a central portion along the rear edge 11 and a hole 62 is also formed in a central portion along the front edge 12 to form a grip portion for holding a carriage.

The bogie shown in FIGS. 2 to 4 is suitable for making the base plate 1 of metal, especially steel plate. Note that the terms "front" and "rear", such as "front edge" and "rear edge", "rear casters" or "front casters", are used to describe the structure of the bogie based on these drawings. However, "before" and "after" here have no absolute meaning so that there is no distinction between front and rear movements of the bogie. Therefore, the interchange of "before" and "after" also falls within the scope of the present invention.

FIG. 5 shows an example of a bogie when the bogie according to the present invention is made of synthetic resin. The cart in FIG.
The only difference from the cart shown in FIGS. 2 to 4 is that the rectangular quadrangular base plate 1 is made of synthetic resin, and the other relationships are completely the same as those shown in FIGS. 2 to 4. Is the same. That is, two rear casters 21 and 22 are symmetrically arranged near both ends along the rear edge 11.
And rear openings 31 and 32 penetrating through the base plate 1 are provided in an inner portion adjacent to the respective rear casters 21 and 22. Also, along the front edge 12, the rear opening 3
Front casters 23 and 24 are symmetrical with 1 and 32
At the outer portion adjacent to the front casters 23 and 24, front openings 33 and 34 penetrating the base plate 1 are provided.
It is attached at a position symmetrical with the center of the rear casters 21 and 22.

In FIG. 5, when the base plate 1 is made of resin, it is preferable that a part of the base plate 1 be hollow. For example, FIG. 6 shows a cross section of the cart shown in FIG. 5 taken along the line AA '.
It is preferable that two synthetic resin plates oppose each other at a fixed interval in the central portion of the base plate 1 existing between the base plate 1 and the base plate 1 and have a hollow 6 inside. In this case, the caster 23
The parts to which are attached are formed by laminating the two synthetic resin plates. The front openings 33 and 34 on the outside are holes, and the outside is a hollow 6 like the above-mentioned central portion.

FIG. 7 shows an end surface shape of the bogie of FIG. 5 cut along the line BB '. In FIG.
The U-shaped recess 71 provided on the lower surface is provided to reinforce the base plate 1, and the U-shaped recess 71 is provided at the bottom of the recess 71.
The two synthetic resin plates are bonded together to form an integral unit. The central hole 72 is used as a grip when the base plate 1 is held by hand.

FIG. 8 shows a cross-sectional shape of the bogie shown in FIG. 5 taken along the line CC '. In FIG.
Most of the base plate 1 is hollow 6
Only the portion 54 provided with 3 is solid. The spill stopper 53 is detachably screwed to the portion 54. The base plate 1 is provided with a stopper 42. The stopper 42 is provided not only on the rear edge 11 side but also on the front edge 12
It is also attached to the side.

In FIG. 2, the casters 21 to 24
Wheels rotate in the direction in which the long sides of the rectangular base plate 1 extend.
The casters were arranged so that
In addition, the wheels of the casters 21 to 24 are rectangular quadrilaterals.
It may be rotated in the direction in which the short side of base plate 1 extends.
No.

In FIG. 5, the casters 21 to 2
4 in the direction in which the long side of the right-sided quadrilateral base plate 1 extends.
The casters were arranged to rotate, but casters 2
The wheels 1 to 24 are similar to the ones mentioned earlier,
10, the extension of the short side of the rectangular base plate 1
May be rotated in a different direction. Note that in FIG.
Move the stopper 45 below the casters 21 to 24
Or above and the lower or upper edge of the openings 31 to 34
Although it was provided at the straddling position, the stopper 45 was
As shown, the section is chair-shaped, and the carts are stacked.
When overlapped, the flat part 452 of the stopper 45
Abuts and the protrusion 451 of the stopper 45 has no opening 31
Into a stable stack
To do that.

[0034]

According to the present invention, in a rectangular quadrilateral base plate, two rear casters are attached symmetrically near both ends along the rear edge, and the base plate is provided on an inner portion adjacent to each rear caster. Two rear casters are provided along the front edge and symmetrically with the rear opening above the front edge, and two base plates penetrate the base plate in an outer portion adjacent to the front casters. The front opening is attached to the center of symmetry with the rear caster, so if the same cart is turned upside down and stacked, the rear caster will be directly above the front opening, and at the same time, the front caster will be Will be on top. In that case, since the rear opening and the front opening were large enough to allow the front casters and the rear casters to pass through, respectively, the front casters were fitted into the rear openings, and the rear casters were inserted into the front openings. It will fit. Therefore, the height of the stack is very low, and the stack can be stably performed.

In this case, if a stopper is protruded from the base plate on the side where the casters are provided, and the protrusion height of the stopper from the base plate is equal to or less than the caster protrusion height and is equal to or more than half of the caster protrusion height. Since the upper trolley is fixed on the lower trolley, the upper trolley is stably fixed on the lower trolley. In particular, when two stoppers protrude along a pair of opposing edges, the upper bogie is more stably fixed on the lower bogie. The present invention has such an effect.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Fig. 9

[Correction method] Added

[Correction contents]

FIG. 9 is a bottom view of another stacking truck according to the present invention.
is there.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] FIG.

[Correction method] Added

[Correction contents]

FIG. 10 shows still another stacking truck according to the present invention.
It is a bottom view.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] FIG.

[Correction method] Added

[Correction contents]

11 is a side when the carts shown in FIG. 10 are stacked;
FIG.

[Procedure amendment 5]

[Document name to be amended] Drawing

[Correction target item name] Fig. 9

[Correction method] Added

[Correction contents]

FIG. 9

[Procedure amendment 6]

[Document name to be amended] Drawing

[Correction target item name] FIG.

[Correction method] Added

[Correction contents]

FIG. 10

[Procedure amendment 7]

[Document name to be amended] Drawing

[Correction target item name] FIG.

[Correction method] Added

[Correction contents]

FIG. 11

Claims (2)

[Claims] 1. A right-angled quadrilateral base plate provided with two rear casters symmetrically near both ends along a rear edge, and a rear opening penetrating the base plate in an inner portion adjacent to each rear caster. Along with the front edge facing the rear edge, two front casters are attached at a position symmetrical with the rear opening, and the base plate penetrates an outer portion adjacent to each front caster. A stack wherein two front openings are provided at positions symmetrical with respect to the rear casters, and the rear openings and the front openings are large enough to pass the front casters and the rear casters, respectively. Trolley. 2. A stopper is protruded from a side of the base plate on which the casters are attached, and a height of the stopper protruding from the base plate is set to be equal to or less than a height of the caster and equal to or more than half of a height of the caster. Stacked trolley described in.