JP2526199B2 - Method of manufacturing a basket for a wheelbarrow - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a large-sized car such as a car for a pushcart or a car for a shopping cart.

[0002]

2. Description of the Related Art Conventionally, when shopping in a shopping center, many housewives use a handcart 1 having a cart 3 on a dolly 2 in FIG. However, since the car 3 is formed to be thin and thin, the car 3 is provided with a relatively thick reinforcing rod to reinforce the strength of the wire. However, a conventionally known cage (for example, European Patent Application Publication No. 514
No. 10) refers to the reinforcing rods arranged on the front wall 5 of the car 3 and the reinforcing rods arranged on the side walls 6 and 7, that is, the intersections of the two, that is, both side edges of the front wall 5. Are abutted on each other at the corners, and both are welded and fixed at the corners. Therefore, when a cheerful child of 2 to 3 years old who came to the shop in the shopping center runs around, it collides with the butt welded portions at the corners which are both side edges of the front wall 5 of the car 3. . In this case, the height of the upper edge of the car 3 is usually set to about 80 cm due to the display stand, while the height of the children aged 2 to 3 is 70 to 90 cm. Therefore, the front corner of the car 3 is welded. The club will hit the face of a 2-3 year old. In this case, if it is a girl, it will develop into a serious case that leaves a big scar on the important face. Considering the existence of the PL method in particular, using a pushcart 1 having a basket 3 having a welded portion at a corner in a shopping center poses a high risk and cannot be used in a store. Therefore, conventionally, in order to solve the above-mentioned conventional problems, as shown in FIG. 11, a strong reinforcing rod 30 can have roundness on both sides of the front wall 5, and the welded portion at the angle there. Is configured so that it does not require. The car 3 for a pushcart as shown in FIG. 11 is manufactured as follows. First, using a jig 21f as shown in FIG. 8, a large number of vertical wires 15 and horizontal wires 16 are arranged so that their bottom wall constituent portions 15a, 16a are in a grid pattern, and both wires 15, 16 are arranged. Join. Next, as shown in FIG.
And the horizontal strands 16 and the bottom wall component 15 in them.
The front wall forming portion 15b and the left and right side wall forming portions 16c and 16d are bent with respect to a and 16a so as to be in a rising state.
Next, it is formed to be thicker than the above vertical strands and horizontal strands, and is bent as shown in FIG. 10 to reinforce the front wall and the left and right side walls, and the corners are rounded, and the overall shape is U-shaped. The reinforcing frame (reinforcing rod) 30 thus prepared is prepared. And as shown in FIG. 11, a basket 3
In the front wall 5, the front wall constituent portion 15b of the vertical wire 15 and the front wall reinforcing portion 30b of the reinforcing frame 30 are provided, and in the left side wall 6, the side wall constituent portion 16c of the horizontal wire 16 and the reinforcing frame. Side wall reinforcing portion 30c in 30
In the right side wall 7, the side wall constituting portion 16d and the side wall reinforcing portion 30d are connected to each other. For example, a jig (not shown) is attached and the respective members are positioned, and resistance welding is performed by sandwiching the upper and lower electrodes 28 and 27 in a resistance welding machine as shown in FIG. In this case, in order to weld each part of the above-mentioned three surfaces, the car 3 is held in hand and turned in the directions of arrows 31 and 32 to perform the work while changing the direction.

[0003]

In this conventional method for manufacturing a basket for a pushcart, when the U-shaped reinforcing rod 30 is mounted, work is performed while holding the basket 3 in the hand and changing the direction as described above. Must be done. Further, the cage 3 is very heavy because the jig is attached as described above. Therefore, there is a problem that requires a worker who has strength. Further, when the ends of the side walls 6 and 7 are welded, as is apparent from FIG. 11, it is necessary to support the heavy car 3 against the electrode 27 in a state in which the left and right weights are unbalanced and work is performed. There was also a problem that it was very difficult to work.

The present invention has been made in order to solve the above-mentioned problems (technical problems) of the prior art. The corners of the reinforcing rods located at the corners on both sides of the front wall of the car are rounded. ~ 3
Even a woman or a woman with weak physical strength or an elderly person can easily carry out the manufacturing work of a basket configured so that even if the face of a talented child collides with it, it does not require a large amount of force. It is an object of the present invention to provide a method for manufacturing a car for a pushcart that can be configured without providing dangerous welding points on both corners of the front wall of the car.

[0005]

A method for manufacturing a car for a pushcart according to the present invention comprises a plurality of vertical strands each having a length that constitutes a bottom wall and a front wall of a pushcart, and the above-mentioned vertical strands, respectively. A large number of horizontal strands having a length that configures the bottom wall and left and right side walls of the car are arranged at predetermined intervals and in a state of mutually overlapping in a lattice pattern, and the left and right sides of the plurality of horizontal strands are arranged. Each of the side wall constituent parts is provided with a front wall half-face reinforcing rod which is bent at its one end to be raised, and the side wall reinforcing rods which are thicker than the vertical and horizontal strands are overlapped with each other. Side by side, the step of connecting the vertical wire and the horizontal wire to each other and the horizontal wire and the side wall reinforcing rod to each other, respectively, the plurality of vertical wire and the plurality of horizontal wire to the bottom wall constituent parts A step of bending the wall constituent parts and the left and right side wall constituent parts so as to be in a rising shape; The vertical walls are bent from the right side wall reinforcing rod and are joined to the front wall half-face reinforcing rods that are respectively directed toward the front wall central portion, and the folding causes the front walls to overlap each other in a lattice pattern on the front wall. And a step of connecting the front wall constituting portion of the wire and the front wall half-surface reinforcing rod.

[0006]

[Operation] A car having a structure in which the corners of the reinforcing rods located on both corners of the front wall of the car are rounded so that even if the faces of children aged 2 to 3 are not damaged seriously In this case, when the horizontal wire and the vertical wire forming the car are connected to the reinforcing rod, the connection work can be performed in a state that even women and women can handle them.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. In FIG. 1, reference numeral 1 denotes a handcart, which shows a shopping cart as an example. Reference numeral 2 denotes a trolley in the cart, and 3 denotes a car mounted on the trolley 2. Next, the car 3 will be described with reference to FIG. 4 is the bottom wall, 5 is the front wall,
Reference numerals 6 and 7 denote the left and right side walls, respectively. 8 is an open part on the rear surface,
A hanging door 9 is provided as shown in FIG. The upper end of the hanging door 9 is pivotally supported by a door support piece 10 attached to the left and right side walls 6 and 7, and the hanging door 9 can be freely opened and closed in the arrow direction of FIG. A handle 11 is attached to a handle support piece 12 attached to the left and right side walls 6 and 7. The size of the car 3 as described above is such that the width W shown in FIG. 2 is about the shoulder width of an adult, for example, 580.
It is about mm, and the length L is about the length of the waist of a woman, for example, 800 m when the car 3 is erected as shown in FIGS.
m. The weight is about 6 to 7 kg. Next, members forming each part of the car 3 will be described. 15
Indicates vertical strands, and 16 indicates horizontal strands, for example, diameters 2 to 3
It is configured using a steel wire of about mm. Reference numeral 17 denotes a side wall reinforcing rod, and 18 denotes a front wall reinforcing rod, which are constructed by using, for example, a steel wire having a diameter of about 5 to 6 mm.

Next, the manufacturing process of the car 3 will be described. First, a plurality of vertical strands 15 and a plurality of horizontal strands 16 are prepared. Further, the side wall reinforcing rod 17, the door support piece 10, the handle support piece 1
Prepare 2nd grade. The vertical strands are long enough to form the bottom wall 4 and the front wall 5, and the horizontal strands are long enough to form the bottom wall 4 and the left and right side walls 6, 7. Use the one of Sasano. As shown in FIG. 3, the side wall reinforcing rod 17 has a front wall half-face reinforcing rod 1 having a length half that of the front wall reinforcing rod 18 at one end thereof.
8b is provided in a rising state. As a means for this, a round bar material cut into a predetermined length is bent at a predetermined position and formed into an L-shape. The length of the front wall half-surface reinforcing rod 18b is the same as that of the front wall half-surface reinforcing rod 1 provided on the left side wall reinforcement rod.
It suffices that the front wall reinforcement rod 18 is composed of the front wall reinforcement rod 18b provided on the right side wall reinforcement rod 8b and the front wall half face reinforcement rod 18b. It need not be half as long as 18.

The members prepared as described above are set on the jig 21 as shown in FIG. That is, the door support piece 10,
While setting the handle support piece 12 to the jig 21,
The side wall reinforcing rod 17 is set on the jig 21 so that the front wall half-surface reinforcing rod 18b is in a rising shape as shown in the drawing. Also, vertical strands 15
And each bottom wall constituent portion 15a, 1 of the horizontal strand 16
6a are set so as to overlap each other at a predetermined interval and in a lattice shape, and the front wall constituting portion 15b and the side wall constituting portions 16c and 16d of the strands are set so as to have a prescribed spacing.
The jig 21 is provided with a large number of holding elements for holding the above-mentioned members in the above-described state. Further, the jig 21 is provided with a free wheel 22 on the lower side as shown in the drawing, and is freely movable in a horizontal plane. After finishing the above-mentioned set, while moving the jig 21 by the wheels 22, the bottom wall constituting portions 15a and 16a of the vertical strands 15 and the horizontal strands 16 are coupled to each other, respectively, and The side wall constituting portions 16c and 16d of the wire 16 and the side wall reinforcing rod 17 are connected. Further, the door support piece 10, the handle support piece 12, and the side wall reinforcing rod 17 are also coupled. Each of the above-mentioned connections is performed using, for example, a well-known resistance welding machine. When a large number of products manufactured up to this stage are temporarily stocked, since each of them is flat, the number of stacking stages per fixed height can be increased, and there is an effect that the storage space is small.

Next, the plurality of vertical strands 15 and the plurality of horizontal strands 16 are connected to the front wall constituting portion 15b and the left and right side wall constituting portions 16c, 1 with respect to their bottom wall constituting portions 15a, 16a.
6d is bent so as to have a rising shape as shown in FIG. This step can be performed using, for example, a known press machine. In the case of this bending, the front wall constituting portion 15b is raised first, and the rear side wall constituting portions 16c and 16d are raised. By doing so, the front wall constituting portion 15b can be brought into a state of entering inside the front wall half-surface reinforcing rod 18b.

Next, the front ends of the front wall half-surface reinforcing rods 18b extending from the left and right side wall reinforcing rods 17 are joined together. For example, as shown in FIGS. 5 and 6, the work is performed by placing the left and right front wall half-surface reinforcing rods 18b, 18b at their tips 18b ', 18b' in contact with each other and receiving members 23, 2 in the resistance welding machine.
4, the electrodes 25 and 26 of the resistance welding machine are pressed against the front wall half-surface reinforcing rods 18b and 18b, and the electrodes 2 and
Resistance welding is performed on the front wall half-surface reinforcing rods 18b by passing electric currents between the tips 18b ', 18b' which are butted against each other through 5, 26. The front ends of the front wall half-surface reinforcing rods 18b may be joined to each other by other means. Next, the front wall constituent portion 1 of the vertical wire 15
5b and the front wall reinforcing rods 18 finished by connecting the front wall half surface reinforcing rods 18b are connected. For example, as shown in FIG. 7, a portion where the front wall constituting portion 15b and the front wall reinforcing rod 18 overlap each other is placed on one electrode 27 of the resistance welding machine, and the other electrode 28 is pressed from above. By conducting electricity to the joint between the front wall constituting portion 15b and the front wall reinforcing rod 18 through both electrodes 27, 28, resistance welding is performed there. Note that this coupling may be performed using any other means. In the case of each of the above-mentioned joining work, the operator holds the car 3 and operates it, but the state is a state in which the vertical strands 15 are oriented vertically as shown in FIG. 5 or 7. Further, since the width W of the car 3 is about the shoulder width of an adult as described above, the car 3 can be easily held by holding the car 3 from both sides of the left and right side walls 6 and 7, and the car 3 is vertically long. In this state, the weight balance between the left and right is good, so that the joining work can be easily performed.

By the above-mentioned joining, the car 3 as shown in FIG. 2 is completed. After the car 3 is completed, the hanging door 9 is attached, the handle 11 is attached, and the cart 2 is connected, as shown in FIG.
The handcart 1 such as is completed.

[0013]

As described above, in the present invention, a large number of side wall reinforcing rods 17 are attached to a large number of thin horizontal wires 16 of the side walls 6 and 7 in order to make the side walls 6 and 7 strong. The work is performed at the stage of connecting the vertical wires 15 and the horizontal wires 16 by arranging them in a net shape, that is, before the work of bending the vertical wires 15 and the horizontal wires 16, so that the work has a weak arm strength. Even for women and women or the elderly, the vertical wire 15
Further, there is an effect that the work can be performed without requiring a large amount of force in association with the work of forming the net and the horizontal strands 16 while supporting them with a jig.

Moreover, since the side wall reinforcing rod 17 is attached to the side walls 6 and 7 in advance as described above, the front wall forming portion 15b of the vertical wire 15 and the side wall forming portion 16c of the horizontal wire 16 are formed.
The work after raising 16d and making it three-dimensional is the front wall 5
Only on one surface, the front wall constituting portion 15b and the front wall half surface reinforcing rod 18b which is integrally provided in advance on the side wall reinforcing rod 17 may be joined together. This has the effect of increasing work efficiency.

Further, a reinforcing rod 18 is attached to the only remaining front wall 5.
b and the reinforcing rods 18b are connected to each other by
Since they are on the same surface, for example, as shown in FIGS. 5 and 7, the left and right side walls 6 and 7 hang downward, and there is a feature that they can be easily performed in a well-balanced state, such as a “jijirobe”.
There is an effect that even the above-mentioned ladies and girls or the elderly can very easily carry out without requiring the difficult work of holding a heavy object in the hand and changing the direction as in the prior art.

Further, according to the manufacturing method of the present invention, as is apparent from FIG. 4, on both sides of the front wall 5 of the car 3, as in the conventional product of FIG. There is a feature that the bent portion of the reinforcing rod can be positioned without the end portion of the rod being positioned. This has the effect of making it possible to position a reinforcing rod with a bent shape similar to the conventional product (see FIG. 11) with rounded corners on both sides of the front wall 2. This is a very useful invention for providing a cart for a pushcart that can be safely used even in a shopping center where children aged 3 to 3 run around.

[Brief description of drawings]

FIG. 1 is a perspective view of a handcart.

FIG. 2 is a perspective view of a car for a pushcart.

FIG. 3 is a perspective view showing a state in which a vertical strand, a horizontal strand, and a side wall reinforcing rod are set on a jig.

FIG. 4 is a perspective view showing a state in which bending of vertical strands and horizontal strands has been completed.

FIG. 5 is a front view showing a state in which the front wall half surface reinforcing rods are coupled to each other.

6 is an enlarged view of a portion VI of FIG.

FIG. 7 is a perspective view showing a state of a work of connecting a front wall constituent portion and a front wall reinforcing rod in the vertical strand.

FIG. 8 is a perspective view showing a state in which a vertical strand and a horizontal strand are set in a jig in the conventional method for manufacturing a cart for a pushcart.

9 is a perspective view of a state in which the bending process of the vertical strands and the horizontal strands has been completed from the state of FIG.

FIG. 10 is a perspective view of a reinforcing frame.

FIG. 11 is a perspective view showing a state of a work of connecting the vertical strands and the horizontal strands to the reinforcing frame.

[Explanation of symbols]

 4 Bottom wall 5 Front wall 6,7 Side wall 15 Vertical element wire 16 Horizontal element wire 17 Reinforcing rod

Claims (1)

(57) [Claims] 1. A plurality of vertical strands each having a length that forms a bottom wall and a front wall in a car for a pushcart, and a plurality of lengths that respectively configure a bottom wall and left and right side walls of the car. And the horizontal strands of the horizontal strands are arranged at predetermined intervals and in a state of overlapping each other in a grid pattern, and the left and right side wall constituent portions of the plurality of horizontal strands are bent at one end, and are erected. to <br/> previous Oh comprise wall half reinforcing rod moreover arranged a side reinforcing rod which is thicker than the longitudinal strands and Yokomotosen respectively polymerization form,
A step of connecting the vertical strands and the horizontal strands to each other and a horizontal strand and the side wall reinforcing rods to each other; and a plurality of the vertical strands and the plurality of horizontal strands with respect to their bottom wall constituent parts in front wall construction. And the front wall by bending from the left and right side wall reinforcing rods, respectively.
The front wall half- face reinforcing rods directed toward the central portion are coupled to each other, and the front wall constituent parts and the front wall half-face reinforcement of the vertical strands in the state where they are overlapped with each other in the front wall by the bending are formed. A method for manufacturing a car for a pushcart, comprising: a step of connecting with a rod.