JPH09226593A - Cart - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To provide a bogie capable of switching between a straight traveling mode excellent in straight traveling property and a turning mode excellent in turning property. SOLUTION: A trolley 2 includes a luggage loading table 4, four caster wheels 6 that support the luggage loading table 4 so that the luggage loading table 4 can travel, and a handwheel 8 that is provided upright on the rear portion of the luggage loading table 4.
The lock mechanism 10 fixes the two rear wheels in the front-rear direction. The lock mechanism 10 includes an engagement member 12 and
The engaging member 12 includes an operation mechanism 14 and the like. The support pieces 16 of the two caster wheels 6 on the rear side are provided with engagement pieces 20 that project rearward with the wheel body 18 oriented in the front-rear direction. The engaging member 12 is provided corresponding to each engaging piece 20, and the engaging member 12 is configured by a member having a U-shaped cross section so as to be engaged with the engaging piece 20.
4, the engaging member 12 is moved up and down in the vicinity of the rear edge of the luggage mounting table 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trolley, and more particularly to a trolley having both straight running performance and turning performance.

[0002]

2. Description of the Related Art A trolley is provided with a luggage mounting table having a rectangular shape in a plan view and four wheels arranged at four corners in the front, rear, left and right of the luggage mounting base. In many cases, the front two wheels or the rear two wheels are caster wheels, and the other two wheels are fixed with their wheels oriented forward and backward. This is because caster wheels may all be used from the viewpoint of the turnability of the trolley, but if this is done, straight running performance will deteriorate and luggage transport efficiency will decrease.

[0003]

Therefore, although the conventional bogies are excellent in straight running performance, they are inferior in turning performance. Especially, when the bogies are put in a narrow place with a load, it is narrow. In the case of passing through a bent portion in a passage, when approaching the width of a wall, the efficiency is extremely low, and there is a problem that a weak woman cannot perform these tasks. The present invention has been devised in view of the above circumstances, and an object of the present invention is to provide a trolley capable of switching between a straight traveling mode excellent in straight running performance and a turning mode excellent in turning performance. is there.

[0004]

In order to achieve the above object, the present invention provides a luggage loading table having a rectangular shape in a plan view, and the luggage loading platform provided on the front left and right sides and the rear left and right sides of the luggage loading table, respectively. And four caster wheels for movably supporting each of the caster wheels, each of the caster wheels being composed of a support piece rotatably supported on the luggage mount side and a wheel body rotatably supported by the support piece. A dolly that releasably engages with the support pieces of the two caster wheels on the front left and right sides or the rear left and right sides, and holds the wheel body in the front-back direction with the support pieces engaged. It is characterized in that a lock mechanism is provided.

Further, according to the present invention, the lock mechanism engages with the support piece of the caster wheel in a disengageable manner and holds the wheel body in the front-rear direction while being engaged with the support piece. It is characterized in that it is constituted by a member and an operation mechanism which is arranged on the side of the luggage mounting table and engages and disengages the engaging member with the support piece. Further, according to the present invention, when the engaging member moves downward, the engaging member engages with the supporting piece, and when the engaging member moves upward, the engaging member is separated from the supporting piece, and the operation mechanism extends vertically. A lower end of which is connected to the engaging member, a supporting member which is provided on the luggage mounting table side and supports the rod so as to be vertically movable, and a lower limit position where the engaging member engages with the supporting piece. It is characterized in that it is composed of first locking means for fixing the rod and second locking means for fixing the rod at an upper limit position where the engaging member is separated from the support piece. Further, in the present invention, the operating mechanism is
A spring for urging the engaging member upward is provided.

Further, the present invention is characterized in that the engaging member and the operating mechanism are attached to the two caster wheels on the left and right of the rear portion. Further, according to the present invention, a handle for pushing a hand is erected on a rear portion of the luggage mounting table, and the handle has left and right leg portions standing from the left and right rear portions of the luggage mounting table and upper ends of the left and right leg portions. It is formed in a gate shape with the upper part connecting
The operation mechanism is provided on each of the left and right legs.

Further, the present invention is characterized in that an engaging piece is projectingly provided on the supporting piece, and the engaging member engages with the engaging piece. Further, the present invention is characterized in that the engaging member moves up and down in the vicinity of the rear edge of the luggage mounting table.

In the present invention, by operating the lock mechanism, the front two wheels or the rear two wheels are switched to the straight traveling mode in which the directions are fixed in the front-rear direction, and the four wheels are capable of turning.

[0009]

Next, an embodiment of the present invention will be described. FIG. 1 is a perspective view of a truck according to the present invention, and FIG. 2 is a perspective view of a main part. The cart 2 includes a luggage loading table 4, four caster wheels 6 that support the luggage loading table 4 so that the luggage loading table 4 can travel, and a handwheel 8 that is provided upright on the rear portion of the luggage loading table 4.
The lock mechanism 10 fixes the two rear wheels in the front-rear direction, and the lock mechanism 10 includes an engagement member 12
And the operating mechanism 14 of the engaging member 12 and the like.

The luggage loading table 4 has a rectangular shape in plan view, and the luggage is loaded on the luggage loading table 4. The caster wheels 6 are provided on the front, rear, left and right of the luggage mounting table 4. As shown in FIG. 2, each of the caster wheels 6 has a support piece 16 rotatably supported on the lower surface of the luggage mounting table 4 via bearings, and a wheel body 18 rotatably supported by the support piece 16. It consists of and. The handle 8 is made of a pipe material, and is formed in a gate shape with left and right leg portions 802 standing from the left and right rear portions of the luggage mounting table 4 and an upper portion 804 connecting the upper ends of the left and right leg portions 802. .

Support pieces 16 for the two rear caster wheels 6
An engaging piece 20 that protrudes rearward with the wheel 18 facing the front-rear direction is provided on the. The engaging member 12 is provided corresponding to each engaging piece 20.
Is a member having a U-shaped cross section so as to be engaged with the engaging piece 20, and the operating mechanism 14 moves the engaging member 12 up and down in the vicinity of the rear edge of the luggage mounting table 4.

The operation mechanism 14 is provided corresponding to the engagement member 12, extends vertically and has a lower end connected to the engagement member 12, and the leg portion 8.
02, a support member 24 that is provided at two positions spaced above and below and that supports the rod 22 so as to be vertically movable and non-rotatable; and a spring 2 that biases the rod 22 upward.
6 and a knob portion 28 formed on the upper end of the rod 22.
And a first locking means for fixing the rod 22 to a lower limit position where the engaging member 12 engages with the support piece 16, and the rod 22 to an upper limit position where the engaging member 12 is separated from the support piece 16. It is composed of a second locking means for fixing.

The support member 24 is attached to the leg portion 802 via, for example, a steel band 2402. The support member 24 has a hole 240 through which the rod 22 is inserted.
4 is formed, and the shaft projecting inside the hole 2404 is engaged with the groove formed in the rod 22 so that the rod 22 is supported so as to be vertically movable and non-rotatable. The spring 26 is wound between the upper surface of the lower support member 24 and the stopper 2602 attached to the rod 22.

The first locking means is a gate-shaped metal fitting 30 attached to the upper support member 24 so as to be vertically swingable.
It consists of. The gate-shaped metal fitting 30 engages with the upper surface of the knob portion 28 when the metal fitting 30 is swung upward while the rod 22 is located at the lower limit position. Then, since the rod 22 is biased upward by the spring 26, the upper surface of the knob portion 28 engages with the metal fitting 30, whereby the lower limit position of the rod 22 is held. The second locking means is composed of a stopper (not shown) that is provided on the rod 22 and contacts the lower surface of the support member 24.
Since the rod 22 is biased upward by the spring 26, the stopper comes into contact with the lower surface of the support member 24, whereby the upper limit position of the rod 22 is held.

Next, the operation will be described. When going straight, the engaging piece 20 of the caster wheel 6 on the rear side is directed rearward, the knob portion 28 is pushed in, the metal fitting 30 is swung upward, and the upper surface of the knob portion 28 is engaged. As a result, the engagement member 12 is held at the lower limit position, the trolley 2 is in the straight traveling mode, and the caster wheel 6 on the rear side is held in a state in which the wheel body 18 thereof is oriented in the front-rear direction. Therefore, it is excellent in straight running performance, which is advantageous in improving the carrying efficiency of luggage.

Further, as shown in FIG. 3, when the trolley 2 is put in a narrow place A with a load, or as shown in FIG. 4, it passes through a bent portion C of a narrow passage B. In such a case, or when the width is approached to the wall, the metal fitting 30 is swung downward. As a result, the rod 22 is moved upward by the spring 26, and the stopper forming the second locking means comes to the upper limit position where it abuts the lower surface of the support member 24, and the engaging member 12 separates from the engaging piece 20. The caster wheels 6 on the side are initially in a turnable state, and the trolley 2 is in the turning mode. Therefore, even a weak woman who excels in turning ability has a narrow space A as described above.
The trolley 2 can be easily inserted in the car and the narrow passage B
Can be easily passed through the bent portion C or can be easily moved to the wall.

Further, in the embodiment, since the operating mechanism 14 is constructed by using the rod 22 extending upward, when the caster wheel 6 is switched between the straight traveling mode and the turning mode, the knob portion 28 at the upper end of the rod 22 is used. The switching operation can be easily performed by operating. Further, in the embodiment, since the operating mechanism 14 is attached by using the handle 8, the operating mechanism 14 can be attached with the minimum number of parts, and the operating mechanism 14 is provided behind the handle 8. There is no need to increase the lateral width of the carriage 2.

The structure for engaging the engaging member 12 with the support piece 16 is not limited to that of the embodiment. For example, the engaging member 1
It is optional to rotate 2 to disengage from the support piece 16,
At that time, the engagement piece 20 is omitted and the engagement member 12 is supported by the support piece 16.
May be directly engaged with. Further, the configurations of the first locking means and the second locking means are arbitrary, and various conventionally known structures can be applied.

[0019]

As is clear from the above description, the present invention
The luggage mounting table having a rectangular shape in a plan view, the front and right sides of the luggage mounting table, and the four caster wheels that are respectively disposed on the left and right sides of the rear portion and movably support the luggage mounting table, and each of the caster wheels, A trolley comprising a support piece rotatably supported on the luggage mount side and a wheel body rotatably supported by the support piece, wherein the front left and right or rear left and right caster wheels are supported. Removably engaged with each piece,
A structure is provided in which a lock mechanism that holds the wheel body in the front-rear direction while being engaged with the support piece is provided. Therefore, by switching to the straight-ahead mode, you can improve the transportation efficiency of luggage,
In addition, by switching to the turning mode, even a weak woman can easily perform these tasks, such as putting the trolley in a narrow place, passing a bent part of a narrow passage, or moving it to the wall. It will be possible.

[Brief description of drawings]

FIG. 1 is a perspective view of a carriage.

FIG. 2 is a perspective view of a main part of the carriage.

FIG. 3 is an explanatory diagram of a case where a truck is put in a narrow space.

FIG. 4 is an explanatory diagram of a case where the truck is passed through a bent portion of a narrow passage.

[Explanation of symbols]

 2 dolly 4 luggage loading table 6 caster wheel 8 handle 10 locking mechanism 12 engaging member 14 operating mechanism 16 support piece 18 ring body 22 rod 24 support member 26 spring 28 knob part

Claims (8)

[Claims] 1. A luggage mounting table having a rectangular shape in plan view, and four caster wheels disposed on the front left and right sides and the rear left and right sides of the luggage mounting table to movably support the luggage mounting table, respectively. Each caster wheel is a trolley composed of a support piece rotatably supported on the side of the loading platform and a wheel body rotatably supported by the support piece. A bogie, wherein a lock mechanism is provided, which is detachably engaged with the support pieces of the two caster wheels, and holds the wheel body in the front-rear direction while being engaged with the support pieces. 2. The engaging member, wherein the lock mechanism engages with a support piece of a caster wheel in a disengageable manner, and holds the wheel body in a front-rear direction while engaging with the support piece; The trolley according to claim 1, comprising an operation mechanism which is arranged on the side of the luggage mount and which engages and disengages the engaging member with a support piece. 3. The engaging member is formed so as to move downward to engage with the support piece and move upward to separate from the support piece, and the operation mechanism extends vertically. A rod whose lower end is connected to the engagement member, a support member which is provided on the luggage mounting table side and supports the rod so as to be movable up and down, and a lower limit position at which the engagement member engages a support piece The trolley according to claim 2, comprising first lock means for fixing the rod and second lock means for fixing the rod at an upper limit position where the engaging member is separated from the support piece. 4. The trolley according to claim 2, wherein the operating mechanism includes a spring for urging the engaging member upward. 5. The trolley according to claim 2, wherein the engaging member and the operating mechanism are attached to two caster wheels on the left and right of the rear portion. 6. A handle for standing by hand is provided upright on the rear portion of the baggage loading table, and the handle includes left and right legs standing upright from the rear left and right of the luggage loading table and upper ends of these left and right legs. The trolley | bogie of Claim 2 which is formed in the gate shape with the upper part connected, and the said operation mechanism is each provided in the said leg part on either side. 7. The trolley according to claim 2, wherein an engaging piece is provided to project from the supporting piece, and the engaging member engages with the engaging piece. 8. The trolley according to claim 2, wherein the engagement member moves up and down in the vicinity of the rear edge of the luggage mounting table.