JP5993495B1 - Trolley folding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a folding device for a cart that can be folded quickly. A folding apparatus for a carriage has at least two main frame bars and a movable member. A loading assembly 2 is connected to the two main frame bars 1. The stack assembly 2 includes a folding bar 21, caster sets 22 on both sides, and an article stacking unit 23. The folding bar 21, the caster sets 22 on both sides, and the article stacking unit 23 have an interlocking relationship. A horizontal plate 3 is connected to the top ends of the two main frame bars 1. The movable member 4 is movably fitted on the two main frame bars 1. The movable member 4 further has a pull bar 41. The pull bar 41 passes through the horizontal plate portion 3 and is extended to an extension distance 5. [Selection] Figure 1

Description

  The present invention relates to a cart folding apparatus.

Recently, hand-held trolleys have been seen in various public places.
Many of these trolleys carry luggage and goods by pulling on both wheels.
Since the place to use is almost flat, it can be pulled easily.

The present inventor has filed patents for many carts (Patent Document 1, Patent Document 2, etc.).
The emphasis is on the folding structure of the bogie, but in addition to the folding structure, the pull bar of the bogie supports the user's standing posture with a certain height for the convenience of carrying general users' luggage. There is a need to.

However, it is difficult to fold a pull bar of a cart having a certain height.
In order to solve this problem, the present inventor has developed the structure of the push-type transport vehicle of Patent Document 3.
In this structure, an operation button is installed at an appropriate position on the telescopic frame, and by pressing the operation button, the insertion rod on the two interlocking bars is contracted to control the inner insertion tube, and the outer fitting tube Is moved to an appropriate height and then positioned on the insertion rod.
As a result, the user can push and pull the carriage at an appropriate height, and can store it to the shortest state when not in use.

Taiwan Patent No. M274293 Specification Taiwan Patent No. M383037 specification Taiwan Patent No. 360167 Specification

  The cart folding apparatus according to the present invention is not intended to solve the drawbacks of use of the prior art (Patent Document 3). It aims to solve the problem that the assembly of this becomes difficult and the cost becomes high.

  The object of the present invention is to solve the problem that the assembly of parts is difficult and the cost is increased due to excessive complexity of the components used in the prior art stretchable pull bar, and it can be folded quickly. It is an object of the present invention to provide a cart folding device.

The cart folding apparatus according to the present invention has at least two main frame bars and a movable member.
The at least two main frame bars are separated from each other by a predetermined distance, and the stacking assembly 2 is connected to one end of the two main frame bars.
A horizontal plate is connected to the other ends of the two main frame bars, and has a push block, two locking blocks, and an elastic member on the horizontal plate.
The push block has a push block accommodation groove, and slope portions protrude from one end of the two locking blocks, respectively, and come into contact with both outer sides of the push block accommodation groove.
The elastic member stores or releases elastic potential energy when the push block and the two locking blocks move relative to each other.
The movable member is positioned below the horizontal plate portion and is movably fitted to the two main frame bars. The movable member has two hook bodies, and the two movable members face the horizontal plate portion. Hang on each locking block.
The movable member further includes a pull bar, and the pull bar passes through the horizontal plate portion by an extension distance.

In the cart folding apparatus according to the present invention, when the two hook bodies of the movable member are respectively engaged with the two locking blocks, the pull bar passes through the horizontal plate portion and has the longest extension distance.
When the push block receives an external force action and presses the slopes of the two locking blocks, the two locking blocks on the outer sides that were originally in the push block receiving groove approach each other. Thereby, the two hook bodies disengage the two locking blocks.
The movable member is movably fitted to any position on the two main frame bars. As a result, the stretch distance by which the pull bar passes the horizontal plate portion is changed.
At this time, the elastic member accumulates elastic potential energy. When the external force disappears, the elastic member releases elastic potential energy, whereby the push block and the two locking blocks are restored.
A moving end and a hook end are formed at both ends of the two locking blocks, and an inclined surface portion is installed at the two moving ends. Two hook bodies are hung on the two hook ends, and the first elastic member is interposed between the two moving ends.

  In the cart folding apparatus according to the present invention, the elastic member is a first elastic member installed between the two locking blocks, and a second elastic member installed between the push block and the lateral plate portion. Have

  In the cart folding apparatus according to the present invention, both of the two slope portions have slopes. Both of the two slopes are in contact with both outer sides of the push block receiving groove. When the push block presses the two slopes, the two locking blocks move toward each other according to the inclination of the two slopes. This compresses the first elastic member between the two locking blocks.

In the cart folding apparatus according to the present invention, the stacking assembly further includes a folding bar, casters on both sides, and an article stacking unit.
Both ends of the folding bar are pivoted to two main frame bars, respectively. Two first gears are installed at both ends of the folding bar.
The two first gears are adjacent to the pivot position of the folding bar and the two main frame bars. The two first gears mesh vertically with the two second gears installed on the two main frame bars.
The two second gears mesh vertically with the two third gears installed on the caster sets on both sides. By pushing and moving the folding bar, the two first gears interlock the operation of the two second gears.
The two second gears further interlock with the third gear, whereby the caster sets on both sides are folded or unfolded in the horizontal direction.
Each of the caster sets on both sides is provided with a fixing groove. When the folding bar is expanded in the horizontal direction, the convex members at both ends of the folding bar are fitted into the two fixing grooves, respectively.

Preferably, in the cart folding apparatus according to the present invention, the caster sets on both sides further include two fourth gears. The two fourth gears and the two third gears are positioned in the same vertical direction. The two fourth gears vertically mesh with the two fifth gears pivoted at both ends of the article stacking portion.
When the third gear is operated, the two fourth gears are interlocked and rotated. In this way, the two fifth gears fold in the direction approaching the two main frame bars by interlocking the article stacking unit, or deploying in the direction separating the two main frame bars by interlocking the article stacking unit. To do.

The cart folding apparatus according to the present invention has the following effects.
1. Since the present invention has a pull bar structure that can be expanded and contracted by movably installing a movable member on two main frame bars, the user can grasp the pull bar at an appropriate height when pulling the carriage. Convenient for operation.
2. When the user does not need to operate the cart, the pull bar is accommodated to the shortest distance, and other folding structures are accommodated so that the cart is contracted to the minimum state, which is convenient for storage.
3. The present invention has a simple structure, is easy to assemble, and is convenient for maintenance.
4. According to the present invention, the caster sets on both sides are folded or unfolded in the horizontal direction due to the meshing interlocking relationship of the two first gears, the two second gears, and the two third gears. To achieve.
5. The present invention further includes a fixing groove, and when the folding bar is deployed in the horizontal direction, local positions at both ends of the folding bar are respectively fitted in the two fixing grooves. This prevents the casters on both sides from being folded in the horizontal direction due to the load being too heavy or flipping due to movement in the process of carrying the article by the carriage, and has the effect of increasing safety by fixing.
6. In the present invention, the article stacking portion is 2 by the interlocking relation of the two first gears, the two second gears, the two third gears, the two fourth gears, and the two fifth gears. It is folded in the direction of the main frame bar and is conveniently stored when not in use, and has the effect of not taking up space.

It is a perspective view which shows the trolley | bogie by one Embodiment of this invention. It is a disassembled perspective view which shows the folding apparatus of the trolley | bogie by one Embodiment of this invention. It is sectional drawing which shows the principal part of the folding apparatus of the trolley | bogie by one Embodiment of this invention. It is sectional drawing which shows the principal part of the folding apparatus of the trolley | bogie by one Embodiment of this invention. It is sectional drawing which shows the principal part of the folding apparatus of the trolley | bogie by one Embodiment of this invention. It is a schematic diagram which shows the state which folded the pull bar to the shortest state in the trolley | bogie by one Embodiment of this invention. It is a mimetic diagram showing the loading assembly structure of the cart by one embodiment of the present invention. It is a disassembled perspective view which shows the principal part of the loading assembly of the trolley | bogie by one Embodiment of this invention. It is a schematic diagram which shows the state which folded the trolley | bogie by one Embodiment of this invention to the minimum space state. It is a schematic diagram which shows the state which folded the trolley | bogie by one Embodiment of this invention to the minimum space state.

(One embodiment)
In the illustrated embodiment, the structure and motion of the various parts of the present invention indicated by the direction (up, down, left, right, front, back, etc.) are relative and not absolute.
When these parts are in the position shown, these descriptions are appropriate, but if there is a change in the description of the position of these parts, these direction indications will change accordingly.

As shown in FIG. 1, the cart opening and closing structure according to the present invention has two main frame bars 1.
The two main frame bars 1 are separated from each other by an appropriate distance, and a stacking assembly 2 is jointly connected to the bottoms of the two main frame bars 1.
An article is mounted on the loading assembly 2 and moved.

As shown in FIGS. 2 and 3, the horizontal plate 3 is jointly connected to the tops of the two main frame bars 1.
The horizontal plate part 3 includes a first lid 31, a second lid 32, a push block 33, two locking blocks 34, and a first elastic member 35.
The first lid 31 is partitioned into a plurality of storage spaces 37, and the second lid 32 is coupled to the first lid 31, thereby covering each storage space 37.

Each storage space 37 is a first space 371, a second space 372, and two third spaces 373.
The first space 371 is an opening 311 that leads to the top of the first lid 31, and the lower part of the first space 371 leads to the second space 372.
The second space 372 has a horizontal horizontal bar shape, and the two third spaces 373 are respectively installed at both ends of the first lid 31 and communicate with the second space 372.

Next, the push block 33 will be described.
The push block 33 is installed in the first space 371, and a part of the push block 33 is exposed to the opening 311 and can be pushed by the user.
The push block 33 has a push block accommodation groove 331, and the push block accommodation groove 331 faces the second space 372.
Preferably, two second elastic members 36 are installed between the push block 33 and the first lid 31 for the convenience of the user when pushing the push block 33.
Accordingly, the two second elastic members 36 are installed in the first space 371 and brought into contact with the push block 33, whereby each second elastic member 36 is connected to the two locking blocks 34 in the push block 33. Stores or releases elastic potential energy when moving relative to each other.

Next, the two locking blocks 34 are respectively placed sideways in the second space 372.
A moving end 341 and a hook end 342 are formed at opposite ends of the two locking blocks 34.
A slope portion 3411 is installed on the moving end 341 of an arbitrary locking block.
In the present embodiment, the slope portion 3411 has a triangular shape, but is not limited thereto, and can be implemented if the slope portion 3411 has a slope.

The two locking blocks 34 are placed in the second space 372 in a direction facing the two slope portions 3411.
A first elastic member 35 is installed between the two locking blocks 34.
As a result, the local area of the slope portion 3411 of the two locking blocks 34 contacts both sides of the push block receiving groove 331 of the push block 33.
The first elastic member 35 stores or releases elastic potential energy when the push block 33 and the two locking blocks 34 move relative to each other.

As shown in FIG. 3, the movable member 4 is positioned below the horizontal plate portion 3 and is movably fitted on the two main frame bars 1.
The movable member 4 has a pull bar 41.
The pull bar 41 can pass through the horizontal plate portion 3 and extend the stretch distance 5 (see FIG. 2).

In the present embodiment, the pull bar 41 has a U shape, and the support columns on both sides of the U shape pass through the horizontal plate portion 3.
When the movable member 4 moves along the two main frame bars 1, the stretch distance 5 extends on the horizontal plate portion 3 of the pull bar 41 according to the distance to the horizontal plate portion 3 position of the movable member 4 (see FIG. 2). The length of varies.

That is, if the movable member 4 and the horizontal plate portion 3 are close to each other, the length that the pull bar 41 passes through the horizontal plate portion 3 becomes longer.
On the contrary, if the movable member 4 and the horizontal plate portion 3 are far from each other, the length of the pull bar 41 passing through the horizontal plate portion 3 is shortened.

On the movable member 4, two hook bodies 42 are installed on the protrusions.
The two hook bodies 42 are respectively located inside the U shape of the pull bar 41.
When the movable member 4 approaches the horizontal plate portion 3, the two hook bodies 42 hang on the two locking blocks 34, respectively.
Thereby, the movable member 4 substantially constitutes an interlocking relationship with the horizontal plate portion 3.
When the two hook bodies 42 are respectively hooked on the two locking blocks 34 on the same principle, the distance that the pull bar 41 passes through the horizontal plate portion 3 is the longest.

Next, the implementation state of the cart opening and closing structure of the present invention will be described.
FIG. 3 shows how the user pulls the luggage while standing, and the pull bar 41 needs to have the longest extension distance (not shown).
Therefore, first, the movable member 4 is stretched in the direction of the horizontal plate portion 3, whereby the two hook bodies 42 are respectively hooked on the two locking blocks 34.
Thus, the movable member 4 and the horizontal plate portion 3 are fixed correspondingly, and the user can operate the carriage at an optimum height.

As shown in FIG. 4, when the user does not use the carriage, the push block 33 is pushed.
Then, the pushed push block 33 pushes the sloped portion 3411 of the two locking blocks 34 downward.
Thereby, the two locking blocks 34 approach each other according to the angle of the slope.
When the two locking blocks 34 approach each other, the two hook bodies 42 of the hook ends 342 originally hooked on the two locking blocks 34 are detached.

As shown in FIG. 5, when both are separated, the user is quickly slid the movable member 4 downward, whereby the extension distance (not shown) through which the pull bar 41 passes the horizontal plate portion 3 is shortened to the shortest. The
Thereby, the effect of quick folding is achieved.
At this time, the first elastic member 35 (not shown) and the second elastic member 36 (not shown) store elastic potential energy.
When the external force disappears, the first elastic member 35 (not shown) and the second elastic member 36 (not shown) release elastic potential energy, and the push block 33 and the two locking blocks 34 are restored.
FIG. 6 is a schematic diagram of the folding state of the cart folding apparatus of the present invention.

  As shown in FIG. 7, the stacking assembly 2 to which the two main frame bars 1 are connected includes a folding bar 21, caster sets 22 on both sides, and an article stacking unit 23.

As shown in FIG. 8 (FIG. 8 shows only the structure of one side, but the structures on both sides are symmetrical), both ends of the folding bar 21 are pivoted on the two main frame bars 1.
Two first gears 24 are installed at both ends of the folding bar 21.
The two first gears 24 are adjacent to the pivot position between the folding bar 21 and the two main frame bars 1.
The two first gears 24 further mesh with the two second gears 25 installed on the two main frame bars 1 vertically.
The two second gears 25 mesh with the two first gears 24 and also horizontally mesh with the two third gears 26 on the caster sets 22 on both sides.

As shown in FIGS. 7 and 8, regarding the operational relationship between the two second gears 25 and the two third gears 26, when the folding bar 21 moves upward, the two first gears 24 are reversed. Rotate clockwise.
As a result, the two second gears 25 are interlocked and similarly operated counterclockwise.
The counterclockwise rotation of the two second gears 25 further interlocks with the rotation of the two third gears 26 in the horizontal direction.
Thus, the caster sets 22 on both sides are folded in the horizontal direction.

On the other hand, when the caster sets 22 on both sides are unfolded and used, when the folding bar 21 is first pushed downward, similarly, the two first gears 24 rotate clockwise.
As a result, the two second gears 25 are interlocked and similarly operated clockwise.
The clockwise rotation of the two second gears 25 further interlocks with the counterclockwise rotation of the two third gears 26 in the horizontal direction.
Thus, the caster sets 22 on both sides expand in the horizontal direction.

As shown in FIGS. 7 and 8, fixing grooves 221 are installed on the caster sets 22 on both sides.
When the folding bar 21 is unfolded in the horizontal direction, the convex members 211 at both ends of the folding bar 21 enter the two fixing grooves 221.
As a result, in the process of carrying the article by the carriage, it is possible to prevent the occurrence of a situation in which the loaded object is too heavy or the flipping by the movement causes the caster sets 22 on both sides to be folded in the horizontal direction, and the effect of expanding the safety by fixing Have.

Two fourth gears 27 are further installed on the caster sets 22 on both sides.
The two fourth gears 27 and the two third gears 26 are on the same vertical line, and the two fourth gears 27 are respectively perpendicular to the two fifth gears 28 pivoted at both ends of the article stacking portion 23. Engage with.

When the two third gears 26 are actuated (the folding bar 21 is lifted upward), the two fourth gears 27 are interlocked and rotated together.
In this way, the two fifth gears 28 rotate clockwise, the article stacking unit 23 is folded upward, and the whole is folded into a minimum space state.

9 and 10 are a front view and a rear view of a schematic diagram in which the carriage is folded into a minimum space state.
In FIG. 9, the state in which the caster sets 22 on both sides are folded is accurately seen, and in FIG. 10, the folded form of the article stacking portion 23 is accurately seen.

As shown in FIG. 7, on the contrary, when the folding bar 21 is pushed downward, the two third gears 26 are actuated to rotate the two fourth gears 27 together.
In this way, the two fifth gears 28 rotate counterclockwise, the article stacking portion 23 is deployed downward, and the entire product is deployed and enters the article loading state.

  The embodiments of the present invention described above do not limit the present invention, and therefore the scope protected by the present invention is based on the claims.

1 Main frame bar,
2 loading assembly,
21 Folding bar,
211 convex member,
22 caster set,
221 fixing groove,
23 article loading section,
24 First gear,
25 Second gear,
26 Third gear,
27 Fourth gear,
28 Fifth gear,
3 Horizontal plate,
31 First lid,
32 Second lid,
33 Push block,
331 push block receiving groove,
34 Locking block,
341 Moving end,
3411 slope,
342 hook end,
35 first elastic member,
36 second elastic member,
37 storage space,
371 First space,
372 Second space,
373 Third space,
4 movable members,
41 pull bar,
42 hook body,
5 Stretching distance.

Claims (7)

A cart folding device comprising at least two main frame bars and a movable member,
The at least two main frame bars are separated from each other by a predetermined distance, a stacking assembly is connected to one end, a horizontal plate portion is connected to the other end, and the horizontal plate portion is a push block, 2 Each of the locking blocks and the elastic member, the push block has a push block receiving groove, and a slope portion projects from one end of each of the two locking blocks, and the slope portion is accommodated in the push block receiving portion. When the push block and the two locking blocks move relative to each other on both sides of the groove, the elastic member accumulates or releases elastic potential energy,
The movable member is positioned below the horizontal plate portion and is movably fitted on the two main frame bars, and can be hooked on the two locking blocks. A hook body is installed, and further has a pull bar, and the pull bar penetrates the horizontal plate part by an extended distance,
When the two hook bodies of the movable member are respectively hooked on the two locking blocks, the pull bar passes through the horizontal plate portion and has the longest extension distance,
When the push block is subjected to an external force and presses the slope portion of the two locking blocks, the two locking blocks on both outer sides of the push block receiving groove approach each other, and two The hook body is disengaged from the two locking blocks, the movable member is movably fitted at an arbitrary position of the two main frame bars, and the pull bar passes through the horizontal plate portion. Changing the stretching distance, the elastic member accumulates elastic potential energy,
When the action of the external force disappears, the elastic member releases elastic potential energy, and the push block and the two locking blocks are restored. The two locking blocks have a moving end and a hook end formed at both ends, and are installed so that the inclined portion protrudes from the two moving ends, and two at the two hook ends. The hook body is hung,
The elastic member has a first elastic member,
The cart folding apparatus according to claim 1, wherein the first elastic member is interposed between the two moving ends.   The elastic member includes a first elastic member installed between the two locking blocks, and a second elastic member installed in the lateral plate portion and in contact with the push block. The cart folding apparatus according to claim 1, wherein the cart folding device is provided. The two slope portions both have slopes, and the two slopes are in contact with both sides of the push block receiving groove,
When an external force is applied, the push block moves downward along the two slopes, compresses the two slopes, the two locking blocks move and approach each other, and the two 4. The cart folding apparatus according to claim 3, wherein the first elastic member between the locking blocks is compressed. The loading assembly further includes a folding bar, casters on both sides, and an article loading unit,
Both ends of the folding bar are pivotally connected to the two main frame bars, two first gears are installed at both ends, and the two first gears and the folding bar are two pieces. Next to the pivot position of the main frame bar
The two first gears mesh horizontally with two second gears installed on the two main frame bars,
The two second gears mesh vertically with the two third gears installed on the caster sets on both sides,
By pushing and moving the folding bar, the two first gears interlock the operation of the two second gears, the two second gears interlock the third gear, The cart folding apparatus according to claim 1, wherein the caster set is folded or unfolded in a horizontal direction. Fixing grooves are installed in the caster sets on both sides,
6. The cart folding apparatus according to claim 5, wherein when the folding bar is deployed in the horizontal direction, convex members at both ends are fitted into the two fixing grooves, respectively. The caster set on both sides further has two fourth gears,
The two fourth gears and the two third gears are positioned in the same vertical direction,
The two fourth gears are vertically engaged with the two fifth gears pivoted at both ends of the article stacking unit,
When the third gear is activated, the two fourth gears are interlocked and rotated,
The two fifth gears interlock the article stacking unit and the article stacking unit is folded in a direction approaching the two main frame bars, or the article stacking unit is interlocked and the article stacking unit 6. The cart folding apparatus according to claim 5, wherein the portion expands in a direction away from the two main frame bars.

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