JP2852506B2 - Cart - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cart for carrying, for example, a plastic container or the like.

[0002] In this specification, the term "aluminum" shall include aluminum alloys in addition to pure aluminum.

[0003]

2. Description of the Related Art Conventionally, as this kind of truck, as shown in FIG. 4, a total of four side members (20) and (21) made of an extruded aluminum member having an L-shaped cross section, two in length and two in short, are made of four plastics. A frame-shaped base (23) having a rectangular shape in a plan view formed by being connected via a corner member (22) made of
It is known that four casters (24) are attached to the lower surface of (22). Each side member (20) (21) of the stand (23)
Put both ends on the corner member (22), and the side members (20) (21)
Is fixed to the corner member (22) by screwing a flat head screw (25) penetrating the horizontal wall (20a) (21a) from above into a screw hole (26) formed in the corner member (22). I have. Casters
(24) is a bolt (27) having a countersunk head that penetrates the side members (20) and (21) and the corner member (22) from above, and a corner member (22)
It is attached to the corner member (22) using a bolt (28) having a countersunk head that penetrates only from above. Edge member (20)
(21) and the bolt (27) penetrating the corner member (22) also serve to connect the side members (20) and (21) and the corner member (22). Then, in order to make the upper surface of the table (23) flat, both ends of the horizontal wall portions (20a) and (21a) of the side members (20) and (21) have upper surfaces that are the upper surfaces of the corner members (22). It is fitted in a recess (22a) formed on the upper surface of the corner member (22) so as to be flush. The holes (29) and (30) in the side members (20) and (21) through which the flat head screw (25) and the bolt (27) having the flat head penetrate have a dish shape. Further, the upper end of the hole (31) in the corner member (22) through which the bolt (28) having the countersunk head penetrates is also dish-shaped.

[0004]

However, in the conventional bogie, the base (23) is composed of four side members (20) and (21) and four corner members (22), and these are screws (25). And bolt (27)
Since they are connected by (28), it takes time to assemble them.
Further, since it is necessary to form countersunk holes (29) and (30) in the side members (20) and (21), the work is troublesome. Therefore, there is a problem that the manufacturing operation of the entire bogie is troublesome.

[0005] It is an object of the present invention to provide a truck which solves the above-mentioned problem.

[0006]

A truck according to the present invention comprises:
A box-shaped base that opens upward, and a plurality of casters attached to the lower surface of the base, the base comprising a rectangular bottom plate and side plates integrally provided in a rising shape on both side edges of the bottom plate, respectively. A substantially U-shaped aluminum extruded profile base body and two end plates fixed to both ends of the base body, respectively, are formed on a lower surface of a bottom plate of the base body, extend in a length direction and open downward. And, a plurality of grooves are formed which can accommodate the head of the square bolt or the square nut so as not to rotate and fall off, and the caster is mounted in the square bolt or the groove in which the head is accommodated in the groove. It is attached to the base body using the accommodated square nut.

[0007] According to the above-mentioned cart, since the stand is composed of the stand body and the end plate fixed to the stand body, it is possible to assemble it by a simple operation of fixing the end plate to the stand body. Further, a groove is formed on the lower surface of the bottom plate of the base body so as to extend in the length direction and open downward, and to accommodate the head of the square bolt or the square nut without rotating and falling off. Is mounted on the base body using a square bolt whose head is housed in the groove or a square nut housed in the groove, so the head or nut of the bolt for mounting the caster is Does not protrude from the upper surface of the bottom plate, so that there is no need to perform an operation to prevent these from protruding from the upper surface of the bottom plate in order to make the upper surface of the bottom plate flat.

In the above-mentioned bogie, a plurality of tapping screw screw grooves extending in the length direction are formed in the base body, and tapping screws penetrating the end plate from the outside are screwed into both ends of the tapping screw screw groove. As a result, the end plate may be fixed to the base body. In this case, the tapping screw screw fitting groove can be formed at the time of extrusion molding of the base main body, and it is not necessary to form a screw hole in the base main body or fix a nut, thereby saving labor. Therefore, the manufacturing operation of the entire bogie is simplified. The end plate is fixed to the base body by screwing the screw that penetrated the end plate from the outside into the screw hole formed in the base body, or the screw that penetrated the end plate from the outside to the nut fixed to the base body. When fixing the end plate to the base body by fitting it,
It is necessary to form a screw hole in the base body or fix the nut, which is troublesome, so that the manufacturing operation of the entire bogie is troublesome.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described.
This will be described with reference to the drawings. In the following description,
The left and right in FIGS. 2 and 3 are referred to as left and right, and the front side in FIG. 2 and FIG. 3 is referred to as front, and the opposite side is referred to as rear.

In FIG. 1 to FIG. 3, a cart is composed of a box-shaped platform (1) opened upward and having a rectangular shape in a plan view, and a lower surface (4) of the platform (1).
It consists of four casters (2) mounted on the corners.

The base (1) has a rectangular bottom plate (3) and a bottom plate.
(3) A base body (5) made of extruded aluminum with a substantially U-shaped cross-section consisting of side plates (4) provided integrally on the right and left side edges of the base body (5), and at the front and rear ends of the base body (5) It is formed by two fixed aluminum end plates (6).

On the lower surface of the bottom plate (3) of the base body (5), an internally expanding groove (7) extending in the longitudinal direction (front-rear direction), opening downward, and accommodating a hexagonal bolt (7) head. 8) is formed. The grooves (8) are formed at two portions on the left and right side edges, respectively, at intervals in the left-right direction. Each groove (8) has a pair of hanging walls (9) integrally provided on the lower surface of the bottom plate (3) at predetermined intervals in the left-right direction, and each hanging wall (9).
And a horizontal protruding wall (10) which is integrally provided on the lower edge and protrudes toward the other hanging wall (9). The distance between the hanging walls (9) in each groove (8) is hexagon bolt
The head (7a) of (7) has a width not less than the width across flats and a diagonal distance, so that the head (7a) of the hexagon bolt (7) does not rotate. The distance between the tips of the horizontal protruding walls (10) in each groove (8) is smaller than the width across flats of the head (7a) of the hexagon bolt (7) and smaller than the outer diameter of the shaft (7b). The hex bolt (7) has a large head (7
a) does not fall out of the groove (8). The head (7a) of the hexagon bolt (7) is fitted into the groove (8) from both front and rear ends of the groove (8).

Further, an inner portion of the base (1) at the upper edge of the side plate (4) of the base body (5), an inner portion of the base (1) at a connecting portion between the side plate (4) and the bottom plate (3), and a bottom plate (3) and 2 at the center
A groove (11) for fitting a tapping screw, which extends in the length direction, is formed in an outer portion of the groove (8) at a connecting portion of the two grooves (8) with the hanging wall (9) on the inner side in the left-right direction.

The end plate (6) has a rectangular shape having a length equal to the width of the base body (5) in the left-right direction and a width equal to the height of the side plate (4). In, groove (8)
Strip-shaped projection with a width equal to the height of the hanging wall (9)
(6a) is provided integrally. The length of the downward protruding part (6a) is the length of the hanging wall on the inner side in the left-right direction of the two grooves (8) on the central part.
(9) The distance between the two is approximately equal to each other, and the lower projection (6a) allows the bottom plate (3) and the two grooves (8) at the center to be formed.
Groove (8) at the joint with the hanging wall (9) on the inside in the left-right direction
Tapping screw screw groove formed on the outer part (11)
Only the front and rear openings of the groove (8) are closed, and the front and rear openings of the groove (8) are not closed so that the hexagon bolt (7) does not interfere with the fitting of the head (7a) into the groove (8). I have. And the end plate
(6) is fixed to the base body (5) by screwing a tapping screw (12) penetrating the end plate (6) from the outside in the front-rear direction to both ends of the tapping screw screw fitting groove (11). .
The fixing of the end plate (6) to the base body (5) may be performed by an adhesive, partial welding or brazing instead of the above method. In this case, it is needless to say that the tapping screw screw-in groove (11) of the base body (5) is not required, and the downward projecting portion (6a) of the end plate (6) is not required.

The caster (2) is formed by passing a shaft (7b) of a hexagonal bolt (7) through a through hole (14) formed in the substrate (13) and screwing a nut (15) to the tip of the caster (2). It is fixed to the stand (1) by. In the above, 6 is used to fix the caster (2).
Although a square bolt (7) is used, a square bolt may be used instead. Also, fix the caster (2)
Instead of (7a) using square bolts housed in grooves (8),
A square nut, such as a hexagon nut or a square nut, housed in the groove (8) may be used. In this case, the caster (2) substrate (13)
The caster (2) is mounted on the base by screwing the tip of a bolt passed through the through hole (14) formed in
Fixed to (1). In this case, the interval between the hanging walls (9) in each groove (8) is set to be equal to or larger than the width across flats of the head of the square nut and smaller than the diagonal distance, so that the square nut does not rotate. In addition, the distance between the tips of the horizontal protruding walls (10) in each groove (8) is made smaller than the width across flats of the square nut and larger than the outer diameter of the screw hole. Do not fall out of the groove (8).

[0016]

According to the truck of the first aspect of the present invention, as described above, the assembling work of the platform is simplified, and the bolt head or nut for attaching the caster is prevented from protruding from the upper surface of the bottom plate. This eliminates the need for an operation for performing the operation, thereby simplifying the operation of manufacturing the entire bogie.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a partially enlarged front view of the same.

FIG. 3 is a partially enlarged cross-sectional view of the base body.

FIG. 4 is an exploded plan view showing a conventional example.

[Explanation of symbols]

 (1) Stand (2) Casters (3) Bottom plate (4) Side plate (5) Stand body (6) End plate (7) Hexagon bolt (7a) Head (8) Groove

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B62B 5/00 B60B 33/00 504 B65D 19/42

Claims (2)

(57) [Claims] 1. A box-shaped base which is opened upward, and a plurality of casters mounted on the lower surface of the base. The base is integrally provided on a rectangular bottom plate and on both side edges of the bottom plate in a rising manner. A base body made of an extruded aluminum member having a substantially U-shaped cross section and two end plates fixed to both ends of the base body, and extending in the length direction on the lower surface of the bottom plate of the base body. And a plurality of grooves which are open downwardly and which can receive the head of the square bolt or the square nut without rotating and falling off, and wherein the caster has a head housed in the groove. Or a trolley attached to the pedestal body using a square nut housed in the groove. 2. A plurality of tapping screw threading grooves extending in the length direction are formed in the base body, and tapping screws penetrating the end plate from outside are screwed into both ends of the tapping screw screw groove. The truck according to claim 1, wherein the end plate is fixed to the platform body.