JP3206815U - Trolley - Google Patents

Abstract

A cart capable of switching between two use states is provided. A first frame 2, a switching device 4 connected to a first connection end 25, and a second connection end 312 having a second connection end connected to the switching device 4. A frame 3; a first wheel mechanism 5 installed at the installation end; and a second wheel mechanism 6 installed at the first connection end 25 or the second connection end 312. In addition, at least one of the first frame 2 and the second frame 3 is pivotally mounted on the switching device 4 so as to be able to swing back and forth. A first use state in which the second frame 3 is locked at a position where the first wheel mechanism 5 and the second wheel mechanism 6 can travel together; the first frame 2 and the second frame 3; However, it switches between the 2nd use state latched in the position where only the 1st wheel mechanism 5 can drive | work. [Selection] Figure 9

Description

  The present invention relates to a carriage, and more particularly to a carriage that switches between two states of use.

  A conventional cart is shown in FIGS. 1 and 2, for example. Here, FIG. 1 is a side view showing a first use state of a conventional cart, and a side view showing a second use state of the conventional cart. As shown in FIGS. 1 and 2, a load support frame 11 configured to have a load support surface, a wheel mechanism 12 configured on the side of the load support frame 11 facing the traveling surface, and the load A load support plate 14 installed at the front end of the load support frame 11 so as to be substantially orthogonal to the support surface, and a maneuver installed at the rear end of the load support frame 11 so as to form a predetermined angle with the load support frame 11. Frame 15.

  In addition, the conventional cart has a first use state in which the load supporting frame 11 is installed so as to be substantially parallel to and including the control frame 15 as shown in FIG. As shown in FIG. 2, the switching frame 13 is configured to be able to switch between the second use state installed so as to be substantially parallel to the traveling surface. Has been.

  One end of the switching frame 13 is installed on a front wheel 121 installed at the front end of the load supporting frame 11, and extends to the rear end of the load supporting frame 11. One end of the switching frame 13 is inside the first sleeve 131. The second sleeve 132 installed on the rear wheel 122 installed on the rear wheel 122, the other end of which is installed on the rear end of the luggage support frame 11, and the both ends of the luggage support frame 11 are freely rotatable. , And a support rod 133 installed at a portion connecting the rear wheel 122 in the switching frame 13.

  When the conventional cart is switched from the second use state to the first use state, the second sleeve 132 is slid into the first sleeve 131 and the front wheel 121 is used as an axis to support the load upward. When the support bar 134 is rotated so as to support the luggage support frame 11 at a position that is substantially parallel to the control frame 15 and includes the control frame 15 while swinging the frame 11, the conventional cart is in the first use state. become.

  However, when the conventional cart is in the second use state, the rear wheel 122 receives an external force to the rear, so that the conventional cart easily returns to the first use state against the user's intention. There is a possibility that the user may be injured by the rotation of the luggage support frame 11 returning to the first use state.

  In view of the above problems, an object of the present invention is to provide a cart that can safely maintain both two usage states.

  In order to achieve the above object, the present invention is a cart that can run on a running surface while supporting a load, and has a load supporting surface that can support the load from below, and a rear end. A first frame that is configured to have a first connection end at the front and an installation end at the front, a switching device that is connected to the first connection, and one end In addition to being a second connection end, a second frame connected to the switching device so as to be rotatable with respect to the first frame, and a first frame installed at the installation end. A wheel mechanism, and a second wheel mechanism installed at one of the first connection end and the second connection end, and the first frame and the second frame. And at least one of them is pivotally mounted on the switching device so that it can swing back and forth. In addition, the switching device further moves the cart by the swinging, while the first frame and the second frame form a first predetermined angle while the first wheel and the second frame form a first predetermined angle. The first use state in which the mechanism and the second wheel mechanism are both locked to a position where they can travel in contact with the traveling surface, and the first frame and the second frame include the first The second wheel mechanism does not come into contact with the running surface, and only the first wheel mechanism is brought into contact with the running surface and locked at a position where the vehicle can run while forming a second predetermined angle larger than a predetermined angle. It is configured such that it can be switched between the second use state and the second use state.

  With the above configuration, the cart of the present invention is configured so that the first wheel mechanism and the second wheel mechanism are both the first wheel mechanism and the second wheel mechanism while the first frame and the second frame form the first predetermined angle by the switching device. The first use state position where the vehicle can be in contact with the running surface, and the second frame while the first frame and the second frame form a second predetermined angle that is greater than the first predetermined angle. The first frame mechanism and the second frame are locked at the second use state position where the first wheel mechanism does not contact the travel surface and only the first wheel mechanism can contact the travel surface. It is possible to prevent the cart from switching to another usage state against the intention of the user like a conventional cart, and the possibility that the user will be injured by switching the usage state of the cart is greatly reduced. To do.

It is a side view which shows the 1st use condition of the conventional trolley | bogie. It is a side view which shows the 2nd use condition of the said conventional trolley | bogie. It is a top view which shows the accommodation state of 1st Embodiment of the trolley | bogie of this invention. It is a bottom view which shows the accommodation state of the trolley | bogie of the said embodiment. It is a side view which shows the accommodation state of the trolley | bogie of the said embodiment. It is a fragmentary sectional view which shows the switching apparatus 4 of the trolley | bogie of the said embodiment. It is a partial side view which shows the 1st wheel mechanism of the trolley | bogie of the said embodiment. It is a side view which shows the 1st use condition of the trolley | bogie of the said embodiment. It is a side view which shows the 2nd use condition of the trolley | bogie of the said embodiment. It is a partial side view which shows that the 1st wheel mechanism of the trolley | bogie of the said embodiment is located in a driving | running | working position. It is a side view which shows that the trolley | bogie of the said embodiment switches from a storage state to a 1st use state. It is a fragmentary sectional view which shows that the trolley | bogie of the said embodiment latches to a 1st use condition. It is a side view which shows the 2nd use condition of the trolley | bogie of the said embodiment. It is a fragmentary sectional view which shows that the trolley | bogie of the said embodiment latches to a 2nd use condition. It is a side view which shows the accommodation state of 2nd Embodiment of the trolley | bogie of this invention. It is a side view which shows the 1st use condition of the trolley | bogie of the said embodiment. It is a side view which shows the 2nd use condition of the trolley | bogie of the said embodiment. It is a component exploded view which shows 3rd Embodiment of the trolley | bogie of this invention. It is a side view which shows the accommodation state of the trolley | bogie of the said embodiment. It is a side view which shows the 1st use condition of the trolley | bogie of the said embodiment. It is a side view which shows the 2nd use condition of the trolley | bogie of the said embodiment. It is a side view which shows supporting a load in the 2nd use condition of the trolley | bogie of the said embodiment.

  Hereinafter, the cart of the present invention will be described in detail with reference to the drawings.

  FIG. 8 is a side view showing a first use state of the carriage of the embodiment, and FIG. 9 is a side view showing a second use state of the carriage of the embodiment.

  As shown in FIG. 8, the cart of the present invention is a cart that can run on a running surface while supporting a load, and has a load support surface 27 that can support the load from below. The first frame 2 having the first connection end 25 at the upper and rear ends and the installation end 26 at the front end, the switching device 4 connected to the first connection end 25, and one end The second frame 3 has a second connection end 312 and is connected to the first frame 2 via the switching device 4 so as to be rotatable with respect to the first frame 2, and is installed on the installation end 26. The first wheel mechanism 5 and the second wheel mechanism 6 installed at one of the first connection end 25 and the second connection end 312 are provided.

  At least one of the first frame 2 and the second frame 3 is pivotally mounted on the switching device 4 so as to swing back and forth toward the first connection end 25 or toward the installation end 26. In addition to the two swing surfaces, the switching device 4 is further configured to switch the cart between the first use state and the second use state by the swing.

  In the first use state, as shown in FIG. 8, the first frame mechanism 2 and the second wheel 3 are formed while the first frame 2 and the second frame 3 form a first predetermined angle. Both mechanisms 6 are locked at positions where they can travel while contacting the traveling surface.

  In the second use state, as shown in FIG. 9, the first frame 2 and the second frame 3 form a second predetermined angle larger than the first predetermined angle, The wheel mechanism 6 is not in contact with the traveling surface, and only the first wheel mechanism 5 is locked at a position where it can travel while contacting the traveling surface.

Hereinafter, each embodiment of the present invention will be described in detail.

<First Embodiment>
The cart according to the first embodiment of the present invention has the above-described configuration, and further includes the following configuration.

  FIG. 3 is a top view showing the storage state of the first embodiment of the carriage of the present invention, FIG. 4 is a bottom view showing the storage state of the carriage of the above embodiment, and FIG. 5 is a view of the carriage of the above embodiment. It is a side view which shows a storage state.

  As shown in FIGS. 3 and 4, the first frame 2 includes a pair of first side columns 21 that extend in parallel from the installation end 26 to the first connection end 25 on the left and right sides, and a pair 3 and the load supporting surface 27 shown in FIG. 3 and the horizontal bar 22 fixed at a position near the first connecting end 25 of the pair of side columns 21 so as to connect the side columns 21 of the pair. A first support plate 23 fixed to a position near the installation end portion 26 of the pair of side pillars 21 and a positioning frame 232 are provided.

  Further, as shown in FIG. 5, the second support plate 24 swings with respect to the first frame 2 with the installation end 26 as an axis, and has a support surface, and the support surface is a load support surface 27. Is switched between a folded state that is horizontal with respect to the bag and a use state in which the support surface is substantially orthogonal to the load support surface 27.

  As shown in FIG. 5, the positioning frame 232 is on the opposite side of the load supporting surface 27 via the first side column 21, adjacent to the first side column 21, and the first support plate 23. And a positioning recess 233 is formed on the opposite side of the luggage support surface 27 via the first side column 21.

  The second frame 3 includes a pair of second side columns 31 extending in parallel with the pair of side columns 21 on both the left and right sides, and the second connection end 312 on the pair of second side columns 31 opposite to the second side columns 31. 9 and a support surface 33 (see FIG. 8). As shown in FIG. 9, the first frame 2 and the second frame are moved by the swing as shown in FIG. When the predetermined angle is formed, the support surface 33 is located on the extension line of the load support surface 27 of the first frame 2 and forms a plane with the load support surface 27.

  As shown in FIGS. 5 and 6, the switching device 4 includes a pair of locking portions 41, a pair of swinging portions 42, and an insertion control portion 32. Further, by switching the orientation of the second frame using these members, the first use state, the second use state, the luggage support surface 27 of the first frame 2 and the One of the three states, that is, a storage state in which the support surface 33 of the second frame 3 is in a substantially parallel and opposite positional relationship, can be selected.

  The pair of locking portions 41 are fixed to the first connection end portions 25 of the pair of first side columns 21.

  As shown in FIG. 5, the pair of oscillating portions 42 is formed to be substantially triangular in a side view with the second connection end 312 of each of the pair of second side columns 31 as the first vertex. The second vertex of the substantially triangular shape described above is formed on the opposite side of the support surface 33 from the first vertex described above, and the third vertex is formed on the support surface 33 side than the first vertex described above. Is done. Further, the third vertex is pivoted on the locking portion 41, and the second frame 3 is pivoted to the opposite side of the support surface 33 with the third vertex pivoted on the locking portion 41 as a fulcrum. Can be made. A recess 421 is formed at the periphery connecting the first vertex and the second vertex of the triangle.

  That is, the pair of oscillating portions 42 expands from the second connection end 312 of each of the pair of second side columns 31 and the second connection end 312 to the oscillating surface, and the oscillating surface. Further, it is fixedly configured so as to be a peripheral portion intersecting the surface, and is pivotally provided at one portion of the enlarged portion so as to be able to swing back and forth with respect to the swing surface on the locking portion 41. A recess 421 is formed on the surface.

  Further, it is configured to be fixed so as to have a peripheral portion intersecting with the swing surface, and is pivotally provided at one portion of the enlarged portion so that it can swing back and forth with respect to the swing surface on the locking portion 41, Moreover, the recessed part 421 is formed in the said peripheral part.

  The insertion control unit 32 has an insertion rod 323 that can be inserted into or removed from the recess 421 of the swinging unit 42 by an operation at the second apex of the triangle described above, and the swinging unit 42 and the pair of second sides. The column 31 is pivoted.

  As shown in FIGS. 5 and 6, the insertion control unit 32 includes a pair of extending rods 321 extending from the portions pivoted on the pair of swinging units 42 toward the grasping rod 311, and the insertion control unit 32. The control rod 322 connecting the tips of the pair of extending portions 321 and the tip from the first vertex pivoted on the pair of swinging portions 42 to the second along the recess 421. And a pair of interlocking bars 324 extending to the top of the interlocking bar 324, and the fitting bar 323 is fixed to the tip of the interlocking bar 324.

  In addition, when the carriage is switched to the first use state, the support portion of the second frame 3 is overlapped with the concave portion 421 and fitted into the fitting rod 323 together with the concave portion 421. When 33 is switched to the second use state, the first locking recess 414 that 33 is locked at a position substantially orthogonal to the support surface of the first frame 2 overlaps with the recess 421 and together with the recess 421 By being inserted into the insertion rod 323, the support surface 33 of the second frame 3 is locked at a position forming one surface together with the load support surface 27 on the extension line of the load support surface 27 of the first frame 2. And the spring 43 applies a biasing force for fitting the fitting rod 323 into the first latching recess 414 or the second latching recess 415. Installed as To have. That is, in this embodiment, the first predetermined angle is approximately 90 degrees, and the second predetermined angle is approximately 180 degrees.

  In this embodiment, as shown in FIG. 6, the locking portion 41 includes two linear peripheral edges that form a corner pivoted at the third vertex of the swinging portion 42, and the two linear shapes. The peripheral edge is connected to each other, and an arcuate peripheral edge in which a first locking recess 414 and a second locking recess 415 are formed is configured. The arc-shaped peripheral edge includes a first arc-shaped peripheral edge 412, a first locking recess 414, and a first engagement between the linear peripheral edge close to the first locking recess 414 and the first locking recess 414. An intermediate arc-shaped peripheral edge 411 between the locking recess 414 and the second locking recess 415, and a second arc-shaped peripheral edge between the linear locking edge close to the second locking recess 415 and the second locking recess 415 413 are formed.

  A method for switching the three states of the carriage of this embodiment will be described. For example, when switching from the stored state to the first use state, as shown in FIG. 11, the second frame 3 together with the pair of swinging portions 42 and the recess 421 are connected to the first locking recess 414. When rotating so as to overlap, the insertion rod 323 comes into contact with the first arc-shaped peripheral edge 412, and the insertion rod 323 is detached from the recess 421 along the first arc-shaped peripheral edge 412 by contacting with the first arc-shaped peripheral edge 412. Then, when the second frame 3 is rotated together with the pair of swinging portions 42 and the concave portion 421 overlaps the first locking concave portion 414, the insertion rod 323 is moved to the spring 43 as shown in FIG. Due to the urging force, the carriage is fitted into the concave portion 421 and the first locking concave portion 414, and the carriage becomes in the first use state.

  Alternatively, the user pushes the control rod 322 of the insertion control unit 32 to the side where the support surface 33 is configured, and the insertion control unit 32 is rotated about the portion pivoted on the swinging unit 42 as an axis, The fitting rod 323 is detached from the concave portion 421 by the rotation, and the second frame 3 is rotated together with the pair of swinging portions 42 until the concave portion 421 overlaps the first locking concave portion 414, and then used. When the person stops pushing against the control rod 322, the insertion rod 323 is inserted into the recess 421 and the first locking recess 414 by the urging force of the spring 43, and the carriage enters the first use state. Become.

  Similarly, when switching from the first use state to the second use state, the user removes the insertion rod 323 from the recess 421 and the first locking recess 414, and the second frame 3 is paired. After the recess 421 is rotated together with the swinging portion 42 until it overlaps the second locking recess 415, the insertion rod 323 is inserted into the recess 421 and the second locking recess 415 by the biasing force of the spring 43. Then, as shown in FIGS. 13 and 14, the carriage is in the second use state. When the carriage is in the second use state, the support surface 33 of the second frame 3 is locked at a position facing the same side while being on the extended surface of the luggage support surface 27 of the first frame 2, The support surface 33 can support the load together with the load support surface 27.

  As shown in FIGS. 7 and 10, the first wheel mechanism 5 includes a pair of swing shafts 521, a pair of transmission parts 51, a control part 54, and a pair of wheel means 55. It is configured.

  The pair of oscillating shafts 521 are installed at the installation end portions 26 of the pair of first side columns 21 so as to be parallel to the pair of first side columns 21, and are connected to the ends of the installation end portions 26. An interlocking gear 522 is installed in the section.

  The pair of transmission parts 51 includes a rotation end part 512 in which a transmission gear 511 that can mesh with the interlocking gear 522 is formed, and is configured to rotate about the rotation end part 512 as an axis. Yes.

  The control unit 54 is connected to ends of the pair of transmission units 51 opposite to the rotation end units 512 so that the rotation of the pair of transmission units 51 can be operated.

  The pair of wheel means 55 is provided on the pair of swing shafts 521, as shown in FIG. 10, at a travel position where the pair of wheel means 55 can travel along the travel surface, and as shown in FIG. So as to be able to swing around a pair of swinging shafts 521 as a center. A pair of wheel frames 52 installed on the wheel frame 52 and a pair of wheels 53 installed on the wheel frame 52 so as to be able to rotate and travel along the traveling surface. Yes.

  Further, in the first wheel mechanism 5, when the transmission gear 511 and the interlocking gear 522 mesh with each other and the pair of transmission parts 51 are rotated by the control part 54, the transmission gear 511 interlocks the interlocking gear 522, The pair of wheel means 55 can be switched between the travel position and the stop position.

  In this embodiment, when the pair of wheel means 55 is brought to the stop position, the pair of transmission parts 51 have a positional relationship such that they further extend from the pair of swing shafts 521. The control unit 54 is connected to the opposite end of the pair of transmission units 51 toward the traveling surface.

  A method for switching the pair of wheel means 55 of the carriage in this embodiment between the travel position and the stop position will be described. When the user pushes the control unit 54 toward the installation end 26 when switching the pair of wheel means 55 from the stop position to the travel position, the transmission gear 511 of the transmission unit 51 rotates around the rotation end 512. The interlocking gear 522 is interlocked with the rotation of the transmission gear 511, and the pair of wheel means 55 moves from the stop position to the travel position. At that time, the tip of the control unit 54 is fitted into the positioning recess 233 of the first frame 2 and the position is determined.

  As shown in FIG. 9, the second wheel mechanism 6 is fixed to the pair of second side columns 31 so as to connect the respective second connection end portions 312 of the pair of second side columns 31. The installation bar 61 and the installation bar 61 are installed on the left and right sides of the installation bar 61 so that the second side column 31 can be rotated along the extension direction of the second side column 31 and extended along the extension direction of the second side column 31. And a pair of casters 62.

  According to the above configuration, when the cart of the present invention is switched to the first use state, the insertion rod 323 of the switching device 4 is inserted into the recess 421 and the first locking recess 414, so that the first As long as the first frame 2 and the second frame 3 are locked so that they cannot swing with each other, and the insertion rod 323 is not intentionally applied with a biasing force applied to the spring 43, the insertion rod 323 is difficult to detach from the recess 421 and the first locking recess 414, and similarly, when the second use state is switched, the insertion rod 323 is inserted into the recess 421 and the second locking recess 415, And since the urging | biasing force is provided to the spring 43, it can prevent switching to another state contrary to a user's will, and a user's possibility of being injured by switching the state of a trolley is reduced significantly. .

  Further, when switched to the second use state, as shown in FIG. 9, since the first frame 2 and the second frame 3 can both support the load, the use state is set to the size of the load 9 or By switching according to the number, it is possible to select and use more than the conventional cart that supports the baggage 9 with one frame, or a use state suitable for the size or number of the baggage 9.

  Since the pair of casters 62 of the second wheel mechanism 6 are installed so as to extend along the extending direction of the second side column 31, when the second wheel mechanism 6 is switched to the second use state, The frame 2 and the second frame 3 are located on both sides of the frame 2 and the second frame 3 has an effect that the operation of the user is hardly hindered.

<Second Embodiment>
FIG. 15 is a side view showing a storage state of the second embodiment of the cart of the present invention, FIG. 16 is a side view showing a first use state of the cart of the above embodiment, and FIG. 17 is the above embodiment. It is a side view which shows the 2nd use condition of this trolley | bogie.

  Since the second embodiment of the present invention has substantially the same configuration as the first embodiment, detailed description thereof will be omitted here, and only the differences will be described.

  In this embodiment, as shown in FIGS. 15, 16, and 17, the first frame 2 is configured not to have the first support plate 23 and the positioning frame 232. In the switching device 4, the insertion control unit 32 is pivoted only on the swinging unit 42, and the pair of swinging units 42 are formed in a triangle, and the corners on which the insertion control unit 32 is pivoted are formed. It arrange | positions so that it may be located in the opposite side to the side in which the support surface 33 is comprised. Further, the first wheel mechanism 5 is configured such that a pair of wheel means 55 is fixed at the travel position.

  According to the configuration of this embodiment, compared to the first embodiment, the first wheel mechanism 5 is the same technical feature as the first embodiment, except that it cannot be switched between the travel position and the stop position. have.

<Third Embodiment>
FIG. 18 is an exploded view showing a third embodiment of the cart of the present invention, FIG. 19 is a side view showing a storage state of the cart of the above embodiment, and FIG. 20 is a first view of the cart of the above embodiment. FIG. 21 is a side view showing a second use state of the cart of the embodiment, and FIG. 22 supports a load in the second use state of the cart of the embodiment. It is a side view which shows this.

  Since the third embodiment of the present invention has substantially the same configuration as the first embodiment, detailed description thereof will be omitted here, and only the differences will be described.

  In this embodiment, as shown in FIG. 18, the switching device 4 is configured such that the insertion control unit 32 is pivoted only on the swinging unit 42, and the first wheel mechanism 5 does not have the control unit 54. Has been. The pair of wheel means 55 is switched between the travel position and the stop position by the interlock mechanism 7 instead of the control unit 54.

  As shown in FIG. 18, the interlocking mechanism 7 is connected to the pair of rotating end portions 512 so as to be able to rotate together with the pair of rotating end portions 512 of the pair of transmission portions 51. It is formed in a fan shape with a rod 71, a second rotating rod 73 installed on the axis of swinging of the swinging portion 42 of the switching device 4 so as to be able to rotate with the swinging of the swinging portion 42. In addition, a plurality of protrusions 741 are formed along the fan-shaped arc, and the pinion is installed on the second rotating rod 73 so as to be able to rotate together with the second rotating rod 73. A plurality of portions 74, a transmission end portion 721 connected to the first rotation rod 71 so as to be able to rotate the first rotation rod 71, and a plurality of projections 741. The interlocking recess 723 and the installation recess recessed on the opposite side of the side where the interlocking recesses 723 are formed. 24, each of which has a transmission rod 72 configured to have a rack end portion 722 formed therein, and the first projection 741 of the plurality of projections 741 of the pinion portion 74 when in the storage state. The projection 741 closest to the wheel mechanism 5 is engaged with the interlocking recess 723 closest to the first wheel mechanism 5 in the plurality of interlocking recesses 723 of the rack end 722, and the storage state is changed to the first use state. When switched, the pinion part 74 is rotated, the plurality of protrusions 741 interlock the plurality of interlocking recesses 723, the transmission rod 72 moves to the first wheel mechanism 5 side, and the transmission end 721 is the first end. By rotating the rotating rod 71, the transmission gear 511 is arranged and configured so that the interlocking gear 522 is interlocked and the pair of wheel means 55 can be switched from the stop position to the traveling position.

  When the carriage is switched to the second use state, the switching device 4 extends from the insertion rod 323 to the opposite side to the second frame 3 side so that it can be inserted into the installation recess 724 of the transmission rod 72. The installation bar 325 is further provided.

  According to the configuration of this embodiment, as shown in FIGS. 19 and 20, the carriage switches from the housed state to the first use state, and the pair of wheel means 55 is switched from the stop position to the travel position. Can do. Further, as shown in FIGS. 21 and 22, when the carriage is switched to the second use state, the installation bar 325 of the switching device 4 can be fitted into the installation recess 724 of the transmission bar 72. It is possible to prevent the user from switching to another state against the intention of the user, and the possibility that the user will be injured by switching the state of the carriage is greatly reduced.

The cart of the present invention is suitable for transporting general loads, and can be switched between two usage states, and is particularly suitable for transporting loads of various shapes and sizes.

2 First frame 21 First side pillar 22 Horizontal frame 23 First support plate 232 Positioning frame 233 Positioning recess 24 Second support plate 25 First connection end 26 Installation end 27 Luggage support surface 3 Second Frame 31 second side pillar 311 grasping rod 312 second connecting end 32 insertion control unit 321 extension rod 322 control rod 323 insertion rod 324 interlocking rod 325 installation rod 33 support surface 4 switching device 41 locking portion 411 intermediate arc shape A peripheral edge 412 A first arc-shaped peripheral edge 413 A second arc-shaped peripheral edge 414 A first engaging concave portion 415 A second engaging concave portion 42 A swinging portion 421 A concave portion 43 A spring 5 A first wheel mechanism 51 A transmission portion 511 A transmission gear 512 Rotation End 52 Wheel frame 521 Oscillating shaft 522 Interlocking gear 53 Wheel 54 Control unit 55 Wheel means 6 Second wheel mechanism 61 Installation rod 62 Caster 7 interlocking mechanism 71 first Kaidobo 72 drive rod 721 transmission end 722 rack end 723 interlocking recess 724 disposed recess 73 second Kaidobo 74 pinion portion 741 projecting 9 Luggage

Claims (5)

A carriage that can travel on the traveling surface while supporting the luggage on the luggage supporting surface,
A first frame having the load support surface capable of supporting the load from below, having a first connection end at the rear end, and an installation end at the front end;
A switching device connected to the first connection end;
A second frame that is connected to the switching device so as to be rotatable with respect to the first frame;
A first wheel mechanism installed at the installation end;
A second wheel mechanism installed at one of the first connection end and the second connection end, and
At least one of the first frame and the second frame is pivotally mounted on the switching device so as to be able to swing back and forth to form a single swinging surface.
The switching device further moves the carriage by swinging,
While the first frame and the second frame form a first predetermined angle, both the first wheel mechanism and the second wheel mechanism are in contact with the traveling surface and can travel. A first use state to be locked;
While the first frame and the second frame form a second predetermined angle larger than the first predetermined angle, the second wheel mechanism does not contact the traveling surface, and the first frame A cart that is configured to be able to be switched between a second use state in which only the wheel mechanism of the vehicle is in contact with the traveling surface and locked at a position where the vehicle can travel. The second frame has a support surface, and when the swinging makes the second predetermined angle with the first frame by the swing, the support surface is the load support surface of the first frame. Is located on the extension line, and forms one plane together with the load supporting surface,
The switching device includes a locking portion fixed to the first connection end,
The second connection end portion of the second frame is fixedly configured so as to have a peripheral portion that extends from the second connection end portion to the swing surface and intersects the swing surface. In addition, a swinging portion pivoted so as to be able to swing back and forth on the swinging surface of the locking portion at one place of the enlarged portion, and a recess formed in the peripheral edge portion,
A control part that has an insertion rod that can be inserted into or removed from the recess of the swing part by an operation, and is pivoted on the swing part,
When the carriage is switched to the first use state, the support surface of the second frame is inserted into the fitting rod together with the concave portion when the carriage is switched to the first use state. A first locking recess that locks at a position substantially orthogonal to the support surface of the first frame; and when the carriage is switched to the second use state, the insertion rod overlaps with the recess and the fitting rod together with the recess. A second locking recess that locks in a position facing the same side while the support surface of the second frame is on the extended surface of the load supporting surface of the first frame. Further, the spring is installed so as to apply a biasing force for fitting the fitting rod into the first locking recess or the second locking recess. The cart according to claim 1. The first wheel mechanism includes:
A pair of swing shafts installed so as to be parallel to each other on both the left and right sides of the installation end;
The pair of swinging shafts cannot travel along the traveling surface arranged in a predetermined lateral direction substantially parallel to the luggage support surface and a traveling position that can travel along the traveling surface. And a pair of wheel means installed so as to be able to swing around the pair of swing shafts as an axis. The cart according to claim 2. An interlocking gear is further installed at one end of the swing shaft,
The first wheel mechanism includes:
A pair of transmission portions having a rotation end portion formed with a transmission gear capable of meshing with the interlocking gear, and rotating about the rotation end portion;
A control unit connected to opposite ends of the rotation end portions of the pair of transmission units so as to be able to operate the rotation of the pair of transmission units;
When the transmission gear and the interlocking gear mesh with each other and the pair of transmission units are rotated by the control unit, the transmission gear interlocks the interlocking gear, and the pair of wheel means is moved to the travel position. The cart according to claim 3, wherein the cart is arranged so as to be switched between the stop position and the stop position. In the switching device, the first use state, the second use state, the load supporting surface of the first frame, and the support surface of the second frame are substantially parallel to each other by switching. It is configured so that you can select one of the three states, the storage state that will be facing each other,
An interlocking gear is further installed at one end of the swing shaft,
The first wheel mechanism includes:
A rotation end portion in which a transmission gear that can mesh with the interlocking gear is formed, and a pair of transmission portions that rotate around the rotation end portion;
A first rotation rod connecting the pair of rotation ends so that the pair of transmission ends can rotate together with the pair of rotation ends;
A second rotating rod installed on the axis of swinging of the swinging portion of the switching device so as to be able to rotate together with swinging of the swinging portion;
It is formed in a fan shape so that a plurality of protrusions are arranged along the fan-shaped arc, and is installed on the second rotating rod so that it can rotate together with the second rotating rod. The pinion part,
A transmission end connected to the first rotating rod so as to be able to rotate the first rotating rod; a plurality of interlocking recesses that can be engaged with the plurality of protrusions; And a transmission rod configured to have a rack end formed with a recessed recess formed on the side opposite to the side where the interlocking recess is formed, and further includes an interlocking mechanism.
When the interlocking mechanism is in the housed state, the protrusions closest to the first wheel mechanism in the plurality of protrusions of the pinion portion are the protrusions in the interlocking recesses of the rack end. Meshed with the interlocking recess closest to the first wheel mechanism,
When the storage state is switched to the first use state, the pinion portion is rotated, the plurality of protrusions interlock the plurality of interlocking recesses, and the transmission rod moves to the first wheel mechanism side. In addition, the transmission end portion rotates the first rotation rod, so that the transmission gear interlocks the interlocking gear so that the pair of wheel means can be switched from the stop position to the travel position. Are arranged and configured
When the carriage is switched to the second use state, the switching device extends from the insertion rod to the opposite side of the second frame so that the carriage can be inserted into the installation recess. The cart according to claim 3, further comprising an installation bar.

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