CN101045460B - Trolley - Google Patents

Abstract

The present invention provides a trolley which can be overlap-disposed orderly when it is preserved at a folding state, without useless space and can be preserved safely with a stable standing state. The structure of this trolley is: an objective table which is used to deposit the merchandise, the caster wheels (8) which are arranged before and after the trolley to move the trolley, and the auxiliary caster wheels which are used for the preservation of the trolley, the main caster wheels at the front side can move to the ones at the back side, furthermore, the objective table of the trolley can overlap to the direction of the caster wheels at the back side, with the moving of the caster wheels of front side to the ones at the back side, the objective table overlaps to the direction of caster wheels at the back side, thereby to help the caster wheels extending to the front side of the main caster wheels at the front side.

Description

Trolley

technical field

The present invention relates to a trolley for carrying objects.

Background technique

A trolley for transporting articles has a structure that does not take up as much space as possible during storage or vehicle transport and can be folded even while maintaining a self-supporting state (see, for example, Patent Document 1 and Patent Document 2) .

Patent Document 1: Japanese Unexamined Patent Application Publication No. 2003-2326 (pages 1 to 6, FIG. 3 )

Patent Document 2: Japanese Unexamined Patent Publication No. 2004-123028 (pages 1 to 7, pages 9 to 10, FIGS. 1 to 2, and FIGS. 10 to 11)

A trolley having such a folded shape (see Patent Document 1) is L-shaped in a plan view, so when stacking and arranging the trolleys in the L-shaped folded state to the front of the trolley, the stacking method It becomes overlapping while shifting in the direction of inclination. That is, this form of overlapping arrangement forms a parallelogram in plan view. Therefore, when the trolley (container) is stored in a room or transported by a vehicle, since the four corners of the room or the four corners of the vehicle are usually formed at right angles, the first one trolley Cars are stowed after contacting the wall at the corner, but the second and subsequent carts are not along the wall of the room or the vehicle loading platform. As the number of overlaps increases, the useless space away from the wall will increase.

In addition, this (see Patent Document 2) folded shape is formed in such a way that only the stage (main body for accommodating objects) is folded in an I-shape in a plan view, and the trapezoidal frame body (bottom frame) on which front and rear wheels are installed body) is retained without folding. In this folded state, when a plurality of overlapping arrangements are arranged, the overlapping method is to overlap without offsetting and sliding along the oblique direction. Therefore, the space occupied by the frame body (bottom frame body) is useless when the trolley (item carrying tool) is stored in a room or transported by a vehicle. There is also a danger of feet being hooked to the frame body (bottom frame body) and falling when passing through.

Contents of the invention

The present invention provides a trolley that has no useless space and is safe and self-supporting.

The structure of the trolley of the present invention is as follows: the trolley is provided with a loading platform for placing goods, main casters arranged at the front and back of the trolley for moving the trolley, and auxiliary casters for storing the trolley. The casters can move to the direction of the main casters on the rear side, and the loading platform of the trolley can also be folded to the direction of the main casting wheels on the rear side. The main casters on the front side are folded so that the auxiliary casters protrude in front of the main casters on the front side.

In addition, the above-mentioned auxiliary casters are configured to form a certain gap with the ground when the front and rear main casters are in contact with the ground, and when the stage is folded, the main casters on the front side of the trolley are used as fulcrums to tilt the trolley forward. Until the auxiliary casters touch the ground, the trolley is free-standing.

In addition, the movement of the main casters on the front side is synchronized with the folding operation of the stage.

Above-mentioned auxiliary caster wheel is arranged on the lower part of the front end of the inverted U-shaped part or the inverted L-shaped part of cross-section which is tapered and stretched out toward the front of the trolley.

The protruding length of the auxiliary casters to the front is greater than or equal to the depth of the folded carrier.

The above-mentioned stage is composed of a bottom plate member, a left and right side frame member, and a back frame (back frame) member. The back frame part is folded inside.

The main casters on the front side can move synchronously with the respective folding operations of the above-mentioned left and right side frame members. move.

When the left and right side frame members are folded inside the back frame member, the side frame member on which the bottom plate member is folded is folded so as to be positioned in front of the previously folded side frame member.

According to the trolley of the present invention, since the main casters provided on the front side of the trolley are moved to the vicinity of the main casters on the rear side, and the loading platform (carrier) is also folded toward the main casters on the rear side, The auxiliary casters are protruded in front of the moving front main casters, so the front and rear main casters are close to each other when the trolley is folded, and the auxiliary casters can be supported from the front side of the trolley. The center of gravity is shifted forward due to the folding of the stage And the self-supporting trolley prevents the trolley from tipping over.

Therefore, even if the dolly (container) is not folded in an L-shape in order to safely make the folded trolley stand independently as in the past, or the frame body (bottom frame body) equipped with casters (wheels) is kept without folding, By means of the invention, the folded trolley can still be free-standing safely and without wasting space.

In addition, since the projection amount of the auxiliary casters is also approximately the same as the folded thickness of the trolley, the entire frame body (bottom frame body) on which the casters (wheels) are mounted does not protrude to a large extent as in the past. , the risk of catching your feet and falling while passing is very small.

In addition, when the front and rear main casters are in contact with the ground, when the trolley with a certain gap between the auxiliary casters and the ground is folded, use the main casters on the front side of the trolley as the fulcrum to tilt the trolley forward until the auxiliary casters touch the ground. , so that the trolley is self-supporting.

Because of this self-supporting state, the main casters on the rear side of the trolley will float from the ground, and by forcing the main casters on the rear side to float from the ground, the center of gravity of the folded trolley will move further forward. The weight supported by the casters increases, thereby improving the contact stability between the auxiliary casters and the ground, so the trolley can be very stably self-supported by the auxiliary casters and the main casters on the front side. In addition, since the trolley is in a forward-leaning posture, backward tilting of the folded trolley can be largely prevented.

In addition, when stacking and arranging a plurality of trolleys, these trolleys can be stacked and arranged without gaps, and at the same time, even when stacked, the stacking method can still be stacked and arranged straight forward. When transporting, no useless space will be formed.

Description of drawings

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

Fig. 2 is a perspective view showing an embodiment of the trolley.

Fig. 3 is an operation diagram showing the folding operation of the trolley.

Fig. 4 is an operation diagram showing the folding operation of the base plate.

Figure 5 is a side view of the folded trolley.

Fig. 6 is a sectional view showing a support arm of an embodiment of an auxiliary caster.

Fig. 7 is a side view showing the auxiliary caster part of the embodiment of the auxiliary caster.

Fig. 8 is a perspective view showing an embodiment of the trolley.

Figure 9 is a side view of the folded trolley.

Fig. 10 is a side view of the trolley showing the storage state.

Fig. 11 is a side view showing the stacked carriages.

Fig. 12 is a plan view showing the stacked carriages.

Detailed ways

Next, the trolley of the present invention will be described with reference to the drawings.

FIG. 1 is an embodiment of the trolley of the present invention, and is a perspective view showing a folded state of the trolley.

The trolley 1 is composed of 2 parts of the bottom plate, left and right side frames (side frame 3, side frame 4), 5 parts of the back frame, main casters 8 constituting the wheels for moving, and auxiliary casters for safely supporting the folded trolley 1 on its own 10 composition.

As shown in FIG. 1 , in the folded state of the trolley 1 , the bottom plate constituting the stage faces the front and is folded upright inside the left side frame 3 , and the right side frame 4 faces the front and is folded to the back frame. 5, in addition, the side frame 3 folded with the above-mentioned base plate 2 is folded to the front side of the side frame 4.

By forming such a state, the auxiliary caster 10 appears in a state protruding forward.

Among the frame components (side frame 3, side frame 4, and back frame 5) arranged above the bottom plate 2 of the trolley 1 to prevent the load from collapsing, the side frame 3 and the side frame 4 are respectively connected to each other by connecting pieces 6. It can be freely bent and connected to both sides of the back frame 5 . Because the back frame 5 side of this connecting piece 6 is fixed together with this back frame 5, and its side frame 3 side and side frame 4 side are owing to make this side frame 3 and side frame 4 pass in the connecting piece 6, Therefore, the side frame 3 and the side frame 4 can freely rotate.

The main casters 8 are respectively arranged on the front, rear, left and right sides of the trolley 1, the rear main casters 8 are fixed on the left and right sides of the back frame 5, one of the main casters 8 on the front side is fixed on the front end of the side frame 3 parts, and the other One is fixed to the front end of the side frame 4 parts.

The installation of the above-mentioned main caster 8 toward each component can be directly installed by making the main caster 8 directly installed on each component, or can be installed indirectly by interposing a certain component between them, and the fixing can be fixed by screws or the like. Fixing by welding is also possible.

In addition, the main caster 8 adopts a form with a brake on a part (usually the front main caster). In addition, all the wheels can be free-wheeling casters that can change the direction of free travel, and the desired parts of the front, rear, left, and right can also be Free casters, while other parts are fixed casters.

The auxiliary caster 10 faces the front of the back frame 5 and is in a state protruding to the front of the back frame 3 members. Its stretching amount is decided by the height of frame (side frame 3, side frame 4, back frame 5), the length of the left-right direction of base plate 2.

That is, as shown in FIG. 5 , if the folded dolly 1 is viewed from the side, the rear side caster 8 of the dolly 1 is inclined toward the auxiliary caster 10 side in the front, so that the load acts on the auxiliary caster 10, making it difficult to move backward. In the stable state of falling, the angle of the above-mentioned inclination is determined by the extension length of the auxiliary caster 10 and the height that the auxiliary caster is arranged slightly above the main caster in the use state of the trolley.

In addition, in the folded state of the trolley, although the auxiliary caster 10 protrudes forward, as shown in FIG. The U-shaped parts or the tapered cross-section inverted L-shaped parts as shown in Figure 6 (b), so that when the trolleys 1 are stacked as shown in Figures 11 and 12, as shown in Figure 7, the stacked trolleys after the arrangement The support arm 9 is accommodated in the support arm 9 of the previously stacked trolleys in a nested form, so that there will be no obstacle when stacked.

In addition, the arm 9 is integrally formed with the support 11 .

FIG. 8 shows a trolley 1 in which the support arm 9 of the auxiliary caster 10 is formed by a tapered section with an inverted U shape.

The rear main caster 8 of such a trolley 1 is installed at a position inside the support arm 9 on the side of the support arm 9 , and the rear main caster 8 on the opposite side is installed at a position substantially symmetrical to the left and right of this position.

In addition, other embodiments of the trolley 1 of FIG. 1 are shown in FIG. 2. In the trolley 1 of this embodiment, the components shown in FIG. The left and right side frame (side frame 3, side frame 4) parts and back frame 5 parts of the trolley 1.

As shown in Figure 2, the folding action of the trolley 1 is the same as that of the trolley 1 shown in Figure 1, facing the front, the right side plate 4a is folded on the front side of the side plate 5a, and the bottom plate 2 forming the loading platform faces the front It is folded in a state standing on the inner side of the left side panel 3a, and the side panel 3a is folded on the front side of the side panel 4a. When such a state is formed, the auxiliary caster 10 appears in a state protruding forward.

In each plate member (side plate 3a, side plate 4a, side plate 5a) that is arranged above the bottom plate 2 of the trolley 1 to prevent the load from collapsing, the side plate 3a and the side plate 4a can be freely connected by connecting pieces 6a. Bendingly connected to both sides of the back plate 5a, and fix the back plate 5a side of the connecting piece 6a with the back plate 5a, because the side plate 3a and the side plate 4a side are connected by the hinge 6b of the connecting piece 6a , Therefore, by this hinge 6b, the side plate 3a and the side plate 4a can freely rotate.

The main casters 8 are respectively arranged on the front, rear, left and right sides of the trolley 1, the main casters 8 on the rear side are fixed on the left and right sides of the side plate 5a parts, one of the main casters 8 on the front side is fixed on the front end of the side plate 3a, and The other is fixed to the front end of the side plate 4a part.

FIG. 3 is an operation diagram showing the folding operation of the trolley of FIG. 2 , which is the same as that of the trolley of FIG. 1 . Fig. 3 (a) has shown the trolley 1 being in use state, starts from this state, at first as shown in Fig. As shown, the base plate 2 is fixed by the fixing arms 7a of the base fixing device 7 arranged on the side plate 3a.

Next, as shown in FIG. 3(c), the side panel 4a is folded to the front side of the back panel 5a, and finally, as shown in FIG. 3(d), the side panel 3a is folded to the front side of the side panel 4a. By forming such a folded state, the auxiliary caster 10 appears in a state protruding forward.

Fig. 9 is a side view of the folded trolley, which shows a state in which frame members such as the back frame 5 are vertically erected, and in this erect state, as shown in an enlarged main part in Fig. The lower end of the auxiliary caster is positioned above the lower end of the main caster, so that a certain gap is formed between the lower end of the auxiliary caster 10 and the ground 12 .

And, when storing the trolley 1 (that is, in practice), since the center of gravity of frame members such as the back frame 5 is displaced to the front side (that is, the auxiliary caster side) with respect to the main caster 8, therefore, as shown in FIG. 10( a ), As shown, the trolley 1 is tilted forward to the auxiliary caster 10 side.

In particular, since the base plate 2 is folded to the frontmost side frame 3 in the folded state, the center of gravity of the entire frame member in the folded state is displaced further forward, so the folded body can be stably and properly supported by the auxiliary casters. trolley, so you don't have to worry about it tipping over backwards. In addition, it goes without saying that if there is no auxiliary caster 10, the trolley in the folded state tends to fall forward. In addition, it can be inferred very easily that in the case of standing upright as shown in FIG. Under the circumstances, it is easy to fall forward and backward. If this situation is taken as a premise, it is easy to understand that if it is supported by auxiliary casters in a forward tilted state, as in the present invention, the stability is high.

FIG. 11 is a side view showing the stacked carts, and FIG. 12 is a plan view showing the stacked carts.

As shown in FIG. 11 and FIG. 12 , the stacked trolleys can be stacked and arranged without gaps, and when stacked and arranged, the overlapping manner can be stacked and arranged straight forward.

Specifically, compared with the case of folding in an L-shape in the top view described in the prior art, the number of trolleys that can be accommodated in the same storage space can be increased by about 50%, and for loads such as trucks, In a rectangular space such as an object table, they can be stacked in a stable state without gaps, and the amount of stacking can be greatly increased as described above.

Claims (7)

1. chassis, be provided with the objective table that is used for arrangement of goods, be configured in the main castor that chassis moves that is used for of chassis front and back, and the auxiliary castor used when preserving of chassis, the main castor of front side can move to the main castor direction of rear side, and, the objective table of chassis also can be folding to the main castor direction of rear side, main castor by the front side moves to the main castor direction of rear side, objective table is folding to the main castor direction of rear side, thereby auxiliary castor stretches out to the place ahead of front side master's castor, described auxiliary castor is under main castor in front and back and ground state of contact, and form certain interval between the ground, main castor with the chassis front side when objective table is folded is that fulcrum turns forward until auxiliary castor kiss the earth chassis, thereby chassis is supported oneself.

2. chassis according to claim 1, wherein, the mobile jackknife action with objective table of the main castor of described front side carries out synchronously.

3. chassis according to claim 1, wherein, described auxiliary castor is arranged at the front end below of the cross section word of the falling U shape parts or the cross section word of the falling L shape parts of the convergent that stretches out to chassis the place ahead.

4. chassis according to claim 1, wherein, more than the depth length of described auxiliary castor extension elongation forwards for folding objective table.

5. chassis according to claim 1, wherein, described objective table is made of base plate part, left and right sides frame parts and back frame member, base plate part is the lateral frame piece folded inside of the side in the frame parts to the left and right, in addition, the left and right sides frame parts also can be respectively to the back frame member folded inside.

6. chassis according to claim 5, wherein, the main castor of front side can with the same moved further of described left and right sides frame parts jackknife action separately.

7. chassis according to claim 5, wherein, when described left and right sides frame parts was folded to the back frame member inboard, folding had a side's of base plate part lateral frame piece to fold in the mode that is positioned at folding before lateral frame piece the place ahead.

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