JP3404619B2 - Transport trolley - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carriage for placing and carrying a load such as a container.

[0002]

2. Description of the Related Art Conventionally, casters are arranged at four corners of a lower surface of a bogie main body formed of a solid plate material having substantially no through holes, and locking projections are vertically provided on the lower surface of the bogie main body. On the upper surface of the trolley body, there is provided a trolley provided with a recess into which a locking protrusion of the trolley located above is fitted when the trolleys are stacked in a cross shape so that their longitudinal directions intersect with each other. Known (for example, Japanese Patent Laid-Open No. 7-2573)
83, etc.).

[0003]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention
When stacking so that the casters of the carriages located above in a cross shape with their longitudinal directions crossing and not placed on the carriage body of the carriage located below (hereinafter, such stacking , Simply "cross stacked"
Say. ), The above-mentioned conventional carrier truck has
Since it is formed of a solid plate material having substantially no through holes, it is suspended in the recess formed in the carriage body of the transporting truck located below, and is suspended from the carriage body of the transporting truck located above. When fitting the stop projection, the recess and the locking projection cannot be seen, so their positions cannot be confirmed,
Therefore, there is a problem that it takes time and labor to fit the recess and the locking projection. Further, since the trolley body is formed of a solid plate material having substantially no through holes, the trolley becomes heavy, and it takes labor to carry the trolley.

Further, in order to facilitate the work of placing the load on the carrier and the work of unloading the load from the carrier, the carrier is provided on the carrier body along only three sides of the upper surface of the carrier body. A ridge portion is formed to prevent a load from falling from the main body. Usually, the long sides of the truck body facing each other are formed with ridges for preventing the load from falling, and the short sides of the truck body facing each other are The ridge portion is formed. Further, such a ridge portion is not formed on the other short side.

When stacking the above-described transport carts so that their longitudinal directions coincide with each other (hereinafter, such stacking is simply referred to as "stacking in the same direction" or "stacking in the same direction"). ), It is preferable to stack so that the short side on which the ridge portion is not formed is located on the same side with respect to all the stacked carriages. By stacking in this way, when the stacked carriages are taken out, the short side without the ridges is always on the same side, so the workability of placing the load on the carriage is improved. improves. However, if the short sides on which no ridges are formed are stacked in different directions, the short sides on which the ridges of the taken out carriage are not formed are checked one by one. If the short side where the ridges are not formed is not in the correct position, the carrier must be rotated by 180 degrees, and therefore, the load must be placed on the carrier. There is a problem that workability is reduced. However, the conventional carrier has no means for easily identifying which side the short side, on which the ridges are not formed, is located, and a large number of stacked carriers are used. Among them, it was difficult to find a carrier truck on the wrong side, in which the short side where the ridges are not formed is located.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the conventional carrier truck and to provide a carrier truck capable of stacking the carrier trucks in a stable state.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention firstly forms a ridge on three sides.
In addition, a large number of through holes are formed by a rib structure in the bogie body in which a space is formed in the central portion, and the ridges formed on the opposite sides of the bogie body respectively have
The trolley body is formed adjacent to the space portion which is formed on the other side of the trolley body opposite to each other and which forms the fitting recess.
On the back surface of each of the engaging protrusions having protrusions, respectively, when hanging and cross-stacking the carriages, the engaging recesses of the carriages located below are fitted into the fitting recesses of the carriages located above.
The projection of the engaging projection is fitted and the engaging
The carriage that is located below the protruding part of the protruding part
The side walls of the ridges located on both sides of the vehicle
Secondly, they are arranged so as to face each other, and secondly ,
The wheel receiving part formed on the trolley body is separated by the partition wall.
Is divided into two wheel receiving chambers, and
Thirdly, the bottom surface of the hook portion has a radius of curvature substantially the same as the radius of curvature of the tread of the wheels of the caster, and thirdly, the trolley body is sandwiched by sandwiching the center line parallel to the side where the ridge portion is not formed. Are color-coded.

First, the carrier V of the present invention will be described with reference to FIGS.

[0009]

Example 1 is a trolley body having a rectangular planar shape,
A ridge 2 having a substantially U-shaped planar shape is formed at the edges of the long side and one short side of the trolley body 1 which face each other so as to prevent the load from falling. Reference numeral 3 denotes a corner plate portion provided at four corners of the carriage main body 1, and when the carriages V are stacked in the same direction on the corner plate portion 3, wheels of the swivel casters of the carriage V positioned above are mounted. Is formed with a recessed wheel receiving portion 4. The structure of the wheel receiving portion 4 will be described later. In addition, on the back surface of the corner plate portion 3, if necessary,
Reinforcing ribs 3a are formed vertically and horizontally. Reference numeral 5 denotes a space portion formed in the central portion of the trolley body 1 and having a substantially rectangular planar shape, which realizes weight reduction of the trolley body 1 and, when stacking a large number of transport trolleys V, if necessary. Then, a columnar body is inserted into the space portion 5 to prevent the stacked carriages V from collapsing.

Ribs 6 are arranged vertically and horizontally between the corner plate portions 3 so as to connect the corner plate portions 3 provided at the four corners of the bogie main body 1, and the portions surrounded by the vertical and horizontal ribs 6 are provided. A through hole 7 is formed in the. Through holes 8 for the handle are respectively formed in substantially central portions of the opposite short sides of the trolley body 1, and similarly, in the approximately central portions of the opposite long sides of the trolley body 1, respectively. A through hole 9 for a handle is formed.

Numerals 10 are fitting recesses formed respectively in the substantially central portions of the ridge portions 2 located on the opposite long sides of the carriage main body 1. The fitting recesses 10 have a substantially planar shape. It is formed in a trapezoid, and the base of the trapezoid is located on the space 5 side. Numeral 11 is a pair of engagement protrusions that are adjacent to the space portions 5 located on the opposite short sides of the trolley body 1 and that hang down from the back surface of the trolley body 1 and have a substantially convex planar shape. As will be described later, the mountain-shaped protrusions 11a of the protrusions 11 located on the opposite short sides of the trolley body 1 are provided on the opposite long sides of the trolley body 1 when the carriages V are cross-stacked. It is configured to be fitted into a fitting concave portion 10 formed at a substantially central portion of the protruding ridge portion 2 located. Also, the engaging protrusion 11
Of the trolley body 1 while continuing to the mountain-shaped protrusion 11a of
The parts 11b parallel to the opposite short sides approach the side walls 2a of the ridges 2 located on both sides of the fitting recess 10 formed in the ridge 2 when the carriages V are cross-stacked. And are opposed to each other.

C is a well-known universal caster attached to the back surface of the corner plate portion 3 by a suitable fastener such as a bolt c1. The universal caster C is rotatable with respect to the corner plate portion 3. It has wheels c3 arranged on the support member c2.

Next, with reference to FIGS. 6 to 8, a case will be described in which the carrier vehicles V of the present invention are stacked in the same direction.

When the carriages V are stacked in the same direction, as shown in FIG. 6, the lowermost carriage V1 is used.
The wheels c3 of the swivel casters C of the carriage V3 to be stacked are mounted so as to fit into the wheel receiving portions 4 formed on the corner plate portions 3 of the carriage V2 placed on the above.
At this time, the tread c3 'of the wheel c3 is not flat,
When curved with a predetermined radius of curvature, the cross section of the bottom surface 4a of the wheel receiving portion 4 along the short side of the carriage body 1 is
It is preferable to bend the wheel c3 so that it has a radius of curvature substantially the same as the radius of curvature of the tread c3 ′ of the wheel c3. With this configuration, as shown in FIG. 7, when the wheel c3 of the upper carriage V is fitted into the wheel receiver 4 of the lower carriage V, the wheel receiver 4 The number of portions where the bottom surface 4a of the portion 4 and the tread c3 'of the wheel c3 come into contact with each other is increased, so that it is possible to stack a large number of transport vehicles V in the same direction in a stable state.

Further, in the carriage V of the present invention, the wheel receiving portion 4 is provided along the long side of the carriage main body 1 with the partition wall 4.
By b, the wheel c3 is divided into two wheel receiving chambers 4c and 4d on which the wheel c3 can be placed. In this way, the wheel receiving portion 4 is divided into the two wheel receiving chambers 4 through the partition wall 4b.
By partitioning into c and 4d, as shown in FIG. 8, even when the support member c2 of the universal caster C is rotated and the wheel c3 is located closer to the short side of the carriage body 1 (FIG. 8, the position of the wheel c3a) or even when the wheel c3 is located far from the short side of the carriage body 1 (the position of the wheel c3b in FIG. 8), both of the wheel receiving chambers 4c, 4d It will be inserted into and placed on
Without paying attention to the rotational position of the wheel c3, the carriage V
Can be stacked in the same direction.

Next, a case where the carriages V of the present invention are cross-stacked will be described with reference to FIGS. 9 and 10.

When the carriages V are cross-stacked, as shown in FIG. 9, the opposite long sides of the carriage body 1 of the cross-stacked carriage V2 on the bottom carriage V1. Fitting concave portion 10 formed on the convex strip portion 2 located on the side
In addition, the trolley body 1 of the trolley V3 to be cross-stacked
Chevron-shaped protrusion 11a of the engaging protrusion 11 hung on the back surface of the
Cross-stacking is done so that they fit together. In this way, the engaging concave portion 10 formed on the convex stripe portion 2 of the transport vehicle V2 located below, the chevron shape of the engaging projection 11 hung on the back surface of the truck body 1 of the transport vehicle V3 located above. Protruding part 11
By carrying out the cross stacking by fitting a, it is possible to prevent the cross-stacked carrier vehicles V from moving in the horizontal direction, and thus the carrier vehicles V can be cross-stacked in a stable state. In addition, the engaging protrusion 1 of the upper carriage V3
1 is continuous with the mountain-shaped protrusion 11a and parallel to the opposite short sides of the carriage main body 1, and the protrusions 2 located on both sides of the fitting recess 10 of the transporting carriage V2 located below.
Since it is configured to closely face the side wall 2a of the vehicle, horizontal rotation of the upper carriage V3 with respect to the lower carriage V2 is suppressed, and thus the carriage V in a more stable state. Can be cross-stacked.

Further, the trolley body 1 has a rib structure composed of vertical and horizontal ribs 6 instead of a solid single plate as in the conventional carrier truck, and a large number of through holes 7 formed by the ribs 6 are provided. Since the structure is provided, the fitting recess 10 of the transport vehicle V2 located below when the transport vehicles V are cross-stacked.
Also, since the engaging protrusion 11 of the upper carriage V3 can be confirmed through the carriage body 1 of the upper carriage V3, the fitting recess 10 of the lower carriage V2 and the upper transport can be confirmed. For the fitting work with the engagement protrusion 11 of the carriage V3,
It can be performed reliably and quickly.

In the embodiment shown in FIG. 11, the carriage main body 1 is divided into two regions 1a and 1b substantially along a center line parallel to the short side of the carriage main body 1, and the regions 1a and 1b are also divided.
Are color-coded with different colors. In this way, the carriage main body 1 is color-coded so that the carriage V
By cross-stacking or stacking in the same direction, it is easy to confirm the short side where the ridge portion 2 is not formed, which is desirable to be located in one direction when stacking a large number. Further, when the carriages V are taken out one by one from the stacked carriage group, if the carriage main body 1 is color-coded, it is easy to confirm the short side where the ridges 2 are not formed. Therefore, it is possible to always supply the carriage V in a state where the short sides on which the ridges 2 are not formed are aligned in the step of placing the load.

The above-mentioned color coding is not limited to the color coding of the two regions 1a, 1b of the carriage main body 1, but only the predetermined width is colored along the opposite short sides of the carriage main body 1, and the color classification is performed. You can also do it. Color code is the trolley body 1
It can be performed by changing the color of the resin at the time of injection molding, or by coating with paint or the like.

[0021]

Since the present invention is constructed as described above, the following effects can be obtained.

Since the bogie main body is provided with a large number of through holes formed by the ribs, when the carriages are cross-stacked, the engaging recesses of the lower carriage and the upper carriage are engaged. Since the colliding part can be confirmed through the trolley body of the upper dolly, the fitting work between the fitting concave part of the lower dolly and the engaging projecting part of the upper dolly can be reliably performed. Moreover, it can be performed quickly.

Since the radius of curvature of the bottom surface of the wheel receiving portion is set to be substantially the same as the radius of curvature of the tread of the wheel, the wheel of the transporting vehicle located above is fitted into the wheel receiving portion of the transporting vehicle located below. In such a case, the number of portions where the bottom surface of the wheel receiving portion and the tread of the wheel come into contact with each other is increased, so that it is possible to stack a large number of carriages in the same direction in a stable state.

Since the carriage main body is color-coded by sandwiching the center line parallel to the side where the ridges are not formed, it is desirable that the carriages are positioned in one direction when stacking the carriages. It is easy to check the short side that is not open, and one by one from the stacked carriage group.
Even when the carrier is taken out, the carriage main body is color-coded, which makes it easy to check the short side where the ridges are not formed.Therefore, during the process of placing the load, the ridges are always used. It is possible to supply the carrier truck in which the short sides without the parts are aligned.

[Brief description of drawings]

FIG. 1 is a perspective view of a carrier truck of the present invention.

FIG. 2 is a plan view of the carriage of the present invention.

FIG. 3 is a rear view of the carrier truck of the present invention.

4A and 4B are views of FIG. 2A, respectively.
FIG. 7 is a vertical cross-sectional view taken along line A-B and line B-B.

5 (a) and 5 (b) are C of FIG. 2, respectively.
It is a vertical cross-sectional view along the line C and the line DD.

FIG. 6 is a perspective view showing a state in which the carriages according to the present invention are stacked in the same direction.

FIG. 7 is a vertical cross-sectional view taken along the short side of the carriage main body showing a state in which the carriages according to the present invention are stacked in the same direction.

FIG. 8 is a vertical cross-sectional view taken along the long side of the carriage main body showing a state where the transport carriages of the present invention are stacked in the same direction.

FIG. 9 is a perspective view showing a state in which the carriages according to the present invention are cross-stacked.

FIG. 10 is a vertical cross-sectional view showing a state in which the carriages of the present invention are cross-stacked.

FIG. 11 is a plan view showing another embodiment of the carriage of the present invention.

[Explanation of symbols]

C ・ ・ ・ ・ ・ ・ Flexible casters c3 ・ ・ ・ ・ ・ ・ Wheels V ・ ・ ・ ・ ・ ・ Carriage cart 1 --- Car body 2 ... ・ ・ ・ Ridge 3 ... ・ Corner plate 4 ・ ・ ・ ・ Wheel receiving part 6 ... Ribs 7 ... 10 --- Mating recess 11 .... Engaging protrusion

Claims (3)

(57) [Claims] 1. A ridge portion is formed on three sides and a central portion is formed.
A large number of through holes are formed by a rib structure in the bogie body in which the space portion is formed , and a fitting recess is formed in each of the ridges formed on opposite sides of the bogie body. Located on the opposite side of the body
Adjacent to the space, a protrusion is provided on the back surface of the bogie body.
The engaging projection having, respectively, suspended, when the delivery truck was loading cloth, into the fitting recess of the transport carriage located below the protrusion of the engagement projection of the transport carriage located above
And engage with the protruding part of the engaging protrusion.
Is located on both sides of the fitting recess of the transporting truck located below.
On the side wall of the ridge located close to
A carrier truck characterized by being configured . 2. A wheel receiving portion formed on a trolley body is a partition.
It is divided into two wheel receiving chambers through the rear wall, and
The carriage according to claim 1, wherein the bottom surface of the wheel receiving portion has a radius of curvature substantially the same as the radius of curvature of the tread of the wheels of the caster. 3. The carrier truck according to claim 1 or 2, wherein the carriage main body is color-coded with a center line parallel to the side on which no ridge is formed.