JP2004203293A - Cart - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cart capable of sliding/fixing a grip by a simple constitution and operation. <P>SOLUTION: The cart is equipped with at least two cylindrical supports vertically provided on a main body equipped with wheels, a luggage storage part, and at least two rod-like grip component members slidably inserted from an opening formed on the upper end of each support. The cart is constituted such that friction resistance between the inner surface of the support and the outer surface of the rod-like grip component member is increased/decreased by providing an expansion/contraction means changing the distance between respective supports, or the distance between respective rod-like grip component members. The expansion/contraction means is equipped with a press mechanism pressing a friction resistance body locked with the support to the outer surface of the rod-like grip component member in a state that the friction resistance between the inner surface of the support and the outer surface of the rod-like grip component member is increased by expanding the distance between the respective rod-like grip component members. A contracted diameter partially formed with a cut is formed in the vicinity of the upper end of the support, and a protrusion preventing pull-out insertable into the cut is formed in the vicinity of the lower end of the rod-like grip component member. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a cart of a wheelbarrow type, such as a shopping cart or a carrying cart, which is provided with at least two handle components on a main body having wheels and a luggage storage unit and is configured to be movable. .
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a cart such as a shopping cart or a carrying cart which is provided with at least two handle components on a main body having wheels and a luggage storage unit and is configured to be movable, the height of the handle components is high. A slide mechanism for adjusting the height is adopted.
Since the slide mechanism requires fixing means for fixing at a desired height, fixing means having various configurations have been proposed.
[0003]
For example, a rod-shaped support standing upright on the main body side includes a cylindrical handle component that is slidably inserted, and is inserted inside by a fixing screw provided through the cylindrical handle component. There has been proposed a fixing means configured to press and fix the outer surface of the strut. (See Patent Document 1)
[0004]
Further, a fixing mechanism is fixed to the two legs of the support frame of the carrying cart, and the cart is configured to be slidable up and down by passing the legs of the handle through the through holes provided in the fixing mechanism. Has been proposed. (See Patent Document 2)
In this cart, a sliding guide is fixed to the tip of the leg, and the sliding guide is configured to slide on the leg of the support frame. A rotating body is axially mounted on the right side, and the rotating body has a portion where the distance from the rotation axis to the outer peripheral surface is short and a long portion, and the distance to the outer peripheral surface is long by rotating the rotating body. The portion is configured to press against the leg to increase and secure the frictional resistance. Further, each of the rotating bodies is provided with an extending portion, and the connecting portions are connected to these extending portions, and by operating the connecting rod, both the rotating bodies are simultaneously rotated.
Further, the fixing mechanism is configured such that the intervening member is pressed by the eccentric rotating body.
[0005]
[Patent Document 1]
JP-A-2002-19616 (page 3, column 3, FIG. 1)
[Patent Document 2]
JP-A-09-277934 (Summary, FIG. 1, page 4, column 5, FIG. 3)
[0006]
[Problems to be solved by the invention]
However, the cart proposed in Patent Literature 1 has a problem that it takes time to operate the fixing screw.
In addition, the carrying cart proposed in Patent Document 2 requires a complicated structure such as a sliding guide, a support frame, a fixing mechanism having a rotating body, a connecting rod, etc. There was a problem of becoming expensive.
[0007]
Therefore, an object of the present invention is to provide a cart that can be slid / fixed by a simple operation with a simple configuration.
[0008]
[Means for Solving the Problems]
According to claim 1 of the cart according to the present invention, the cart includes at least two cylindrical pillars erected on a main body having wheels and a luggage storage unit, and slides from an opening formed at an upper end of each of the pillars. A cart provided with at least two rod-shaped handle components inserted so as to be capable of expanding and contracting the distance between the columns or the distance between the rod-shaped handle components; The frictional resistance between the inner surface of the support and the outer surface of the rod-shaped handle component is increased or decreased.
[0009]
According to the second aspect, the expanding / contracting means enlarges the interval between the rod-shaped handle components to increase the frictional resistance between the inner surface of the column and the outer surface of the rod-shaped handle components. And a pressing mechanism for pressing the frictional resistor locked on the support against the outer surface of the rod-shaped handle component.
[0010]
According to the third aspect, at least two cylindrical pillars are provided upright on a main body having wheels and a luggage storage part, and at least two pillars are slidably inserted from openings formed at the upper ends of the pillars. In a cart provided with two rod-shaped handle components, a reduced diameter portion in which a notch is formed partially is formed near the upper end of the column, and near the lower end of the rod-shaped handle component. After the notch portion is formed with a retaining projection that can be inserted through the notch portion, and after inserting the retaining protrusion of the rod-shaped handle component into the notch portion formed in the reduced diameter portion of the support, the By rotating the rod-shaped handle member about its axis, the rod-shaped handle member was configured not to fall out of the support.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a cart according to the present invention will be described in detail with reference to the drawings showing an embodiment thereof.
[0012]
FIG. 1 is an overall view of a cart according to the present invention, wherein 1 is a cart, which includes a handle 2 and a main body 3 provided with wheels 31 and a luggage storage unit 32. The main body 3 is provided with two cylindrical pillars 4, 4 standing upright, and through the openings 41, 41 formed at the upper ends of the pillars 4, 4, a rod-shaped handle component 6 forming the handle 2, 6 is slidably inserted.
Reference numeral 7 denotes a lock lever, and reference numeral 8 denotes a connection lever that connects the two columns 4, 4.
[0013]
FIG. 2 is an enlarged perspective view of a lock lever 7 which is a main part of the cart 1 and a connection lever 8.
In FIG. 2, both ends of the connecting lever 8 are fixed near the upper end of the support column 4 by means such as welding. The lock lever 7 includes two members rotatably supported by the connection lever 8, that is, a first member 71 and a second member 72. The bases of the first member 71 and the second member 72 are rotatably supported by the connection lever 8 by the first rotation shaft 81 and the second rotation shaft 82, respectively, as described above. Further, the distal ends of the first member 71 and the second member 72 are rotatably connected to each other by a third rotation shaft 73.
The first rotation shaft 81 and the second rotation shaft 82 are formed in long holes 83 and 84 (see FIGS. 4, 5, and 6) which are formed in the bases of the two members 71 and 72 and are long in the longitudinal direction of the member. It has been inserted.
An operation knob 74 for performing a locking operation and an unlocking operation is provided at one of the members, for example, at the tip of the second member 72.
A cutout portion 75 is formed on the lower surface of the tip of the first member 71, and a projection 76 projects between the second rotation shaft 82 and the third rotation shaft 73 of the second member 72. Is established.
[0014]
FIG. 3 is an enlarged perspective view of the vicinity of the lock lever 7 and the connection lever 8 as in FIG. 2, and is a perspective view in which the lock lever 7 is lowered to a locked state.
When the two members 71 and 72 are pushed down from the state shown in FIG. 2, the two rod-shaped handle constituting members 6 are elastically deformed and the interval is pushed down while being extended. When the members are pushed up to the maximum, they become horizontal and straight. .
In this state, the interval between the two columns 4, 4 is regulated by the connecting lever 8, so that the interval between the two rod-shaped handle components 6, 6 that the bases of the two members 71, 72 push open. Only magnified. Since the inner diameter of the column 4 is slightly larger than the outer diameter of the rod-shaped handle member 6, the distance between the two rod-shaped handle members 6, 6 can be increased.
When further depressed, as shown in FIG. 3, the two members 71 and 72 are slightly bent and the notch 75 of the first member 71 abuts on the projection 76 of the second member 72. Stop in the state of doing.
In this state, a force acting to reduce the interval between the two rod-shaped handle members 6, 6 acts by the elastic restoring force. Therefore, if no force is applied from the outside, the two members 71 and 72, which have once become valley-folded, push the gap between the two rod-shaped handle components 6, 6 against the elastic restoring force. Spread it out and it won't break again.
[0015]
4, 5 and 6 are enlarged views of the base of the second member 72 of the lock lever 7 and the pressing mechanism 9 provided in the vicinity of the tip of the column 4. FIG. 4 is an unlocked state, and FIG. FIG. 6 shows a state in which the state is being shifted from the unlocked state to the locked state, and FIG. 6 shows the locked state.
In FIG. 4, the base of the second member 72 in the mountain-folded state is drawn to the left (← direction) in the figure, so that the second rotating shaft 82 is biased to the right of the long hole 84. It has become.
Reference numeral 9 denotes a pressing mechanism, in which a resin block 91 as a frictional resistor is held inside a guide body 92 so as to be movable in a lateral direction. An opening 93 is formed in a side surface of the column 4 so that the resin block 91 can be moved.
In FIG. 4, the base of the second member 72 is drawn to the left, so that the base does not press the resin block 91.
Therefore, a slight gap is formed between the inner surface of the column 4 and the outer surface of the rod-shaped handle component 6, so that the rod-shaped handle component can be freely slid up and down.
[0016]
FIG. 5 shows a state where the lock lever 7 is slightly lowered.
When the lock lever 7 is slightly pressed down, the second member 72 rotates from the state shown by the broken line to a state closer to horizontal. When the two members are pushed down in this manner, the total length becomes longer, and the base end of the second member 72 is pushed outward.
Therefore, the base end of the second member 72 presses the resin block 91, and the resin block 91 contacts the outer surface of the rod-shaped handle component 6.
However, since the locking lever 7 is still not sufficiently pressed down, a slight gap remains between the outer surface of the rod-shaped handle member 6 and the inner surface of the column, and the rod-shaped handle member 6 is locked. Not in a state.
[0017]
When the lock lever 7 is further pushed down to the locked state as shown in FIG. 3, the total length of the two members is further increased, and the base end of the second member 72 is connected to the bar-shaped handle via the resin block 91. The component 6 is pushed outward.
At this time, while elastically deforming the rod-shaped handle component 6 and the support 4, the two members 71 and 72 are once in a linear state, and when further pressed down, the valley is slightly bent as shown in FIGS. It is locked in the state.
In FIG. 6, since the second member 72 is pushed to the right, the second rotating shaft 82 is in a state of being biased to the left of the long hole 84.
In this state, since the rod-shaped handle component 6 is pressed against the inner surface of the support 4, a large frictional resistance is generated on the contact surface S between the two members.
Therefore, the rod-shaped handle component 6 is locked so as not to slide with respect to the column 4.
[0018]
In the state as shown in FIGS. 3 and 6, the cart 1 can be pulled and used.
When it is desired to change the length of the handle, the operation knob 74 is pulled up to change the state shown in FIGS. 3 and 6 to the state shown in FIGS. In this state, since the length of the handle can be freely adjusted, the length is adjusted to a desired length, and the operation knob 74 or the lock lever 7 is pushed down to be locked.
[0019]
Next, in order to prevent the lower end of the rod-shaped handle component 6 from being pulled out from the column 4, a retaining structure as shown in FIG. 7 is formed.
A reduced diameter portion 42 is formed in the opening 41 at the upper end of the support column 4, and the outer diameter of the rod-shaped handle component 6 is slightly smaller than the inner diameter of the reduced diameter portion 42.
A cut-out portion 43 is formed in a part of the reduced diameter portion 42, and the depth of the cut-out portion 43 is a depth up to the inner surface of the column 4 as shown in FIG.
[0020]
On the other hand, a retaining protrusion 61 as shown in FIG. 7 is formed near the lower end of the rod-shaped handle component 6. The height of the retaining projection 61 is set to be larger than the inner diameter of the reduced diameter portion 42 and smaller than the inner diameter of the column.
Accordingly, when the rod-shaped handle component 6 is inserted into the support, the position of the retaining projection 61 formed on the rod-shaped handle component 6 is adjusted by the notch 43 formed on the reduced diameter portion 42. After the insertion and insertion according to the position, the rod-shaped handle component 6 is rotated around its axis, so that the position of the retaining projection 61 is shifted from the position of the notch 43. Numeral 6 prevents the column 4 from accidentally falling out.
[0021]
In order for the above-mentioned retaining structure to function effectively, the two rod-shaped handle components 6 are inserted into the two rod-shaped handle components 6 and turned so as to prevent them from falling out. The handle 2 is constructed by connecting the upper ends of 6, 6 with a handle member 21.
[0022]
The expanding / contracting means is not limited to the illustrated lock lever, and may be any means as long as the distance between the columns or the distance between the rod-shaped handle components is changed. Further, the gap between the columns may be expanded, or the gap between the rod-shaped handle components may be expanded. Further, the frictional resistor may be pressed to generate a larger frictional resistance.
As the retaining structure, a plurality of sets of notches and retaining projections may be provided.
The shapes of the lock lever and the operation knob are not limited to those shown in the figures.
[0010]
【The invention's effect】
As described above, according to the first aspect of the present invention, by providing expansion / contraction means for changing the distance between the columns or the distance between the rod-shaped handle components, the inner surface of the column and the rod-shaped Since the frictional resistance between the handle and the outer surface of the handle member is increased or decreased, the handle is difficult to be pulled out in a state where the frictional resistance is increased, so that the cart can be pulled and used. Further, in a state where the frictional resistance is reduced, the height of the handle can be freely adjusted.
According to the second aspect, the pressing mechanism that presses the frictional resistor against the outer surface of the rod-shaped handle component is provided, so that the state in which the handle is difficult to pull out is further ensured.
According to the third aspect, after inserting the retaining protrusion of the rod-shaped handle component into the notch formed in the reduced diameter portion of the support, the rod-shaped handle component is rotated around its axis. By doing so, the rod-shaped handle member is prevented from coming off from the support, so that the cart handle can be easily assembled and disassembled easily.
[Brief description of the drawings]
FIG. 1 is a perspective view of an embodiment of a cart according to the present invention.
FIG. 2 is a perspective view of a main part.
FIG. 3 is a perspective view of a main part.
FIG. 4 is an enlarged view of a main part.
FIG. 5 is an enlarged view of a main part.
FIG. 6 is an enlarged view of a main part.
FIG. 7 is an enlarged perspective view of a retaining structure.
FIG. 8 is an enlarged side sectional view of the retaining structure.
[Explanation of symbols]
1 cart 2 handle 3 body
31 wheels
32 Luggage compartment 4 support
41 Opening 6 Bar-shaped handle component 7 Lock lever 8 Connecting lever
91 Resin block

Claims (3)

At least two cylindrical pillars are provided upright on a main body having wheels and a luggage storage unit, and at least two rod-like rods are slidably inserted through openings formed at the upper ends of the pillars. In a cart with a handle component,
By providing expansion and contraction means for changing the distance between the columns or the distance between the rod-shaped handle components, the frictional resistance between the inner surface of the column and the outer surface of the rod-shaped handle components is reduced. A cart configured to increase or decrease. The enlarging / reducing means,
In a state in which the distance between the rod-shaped handle components is enlarged to increase the frictional resistance between the inner surface of the column and the outer surface of the rod-shaped handle components,
2. The cart according to claim 1, further comprising a pressing mechanism that presses the frictional resistor locked on the support against the outer surface of the rod-shaped handle component. 3. At least two cylindrical pillars are provided upright on a main body having wheels and a luggage storage unit, and at least two rod-like rods are slidably inserted through openings formed at the upper ends of the pillars. In a cart with a handle component,
In the vicinity of the upper end of the column, a reduced diameter portion in which a cutout portion is partially formed is formed,
In the vicinity of the lower end of the rod-shaped handle component, a retaining protrusion capable of inserting the notch is formed,
After inserting the retaining protrusion of the rod-shaped handle component in accordance with the notch formed in the reduced diameter portion of the column, by rotating the rod-shaped handle component about its axis, The cart is characterized in that the bar-shaped handle component is configured not to come off from a support.

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