JP3195932U - Trolley - Google Patents

Abstract

The present invention provides a cart with high storage convenience. A pair of first sleeves 21, a pair of second sleeves 22 slidably disposed on the pair of first sleeves 21, and lower ends of the pair of first sleeves 21 are provided. A main body frame 2 having a pair of rotation shafts 23 that are fixed next to each other, a wheel mechanism 4 that is switched between a traveling position and a stop position, and a rotation shaft that is attached to the lower end of the main body frame 2. A load having a swing shaft that passes through the lower end of 23, extending so as to be substantially orthogonal to the swing shaft, and being switched between a support position inclined forward and a storage position leaning on the main body frame 2 When the support 3 and the support base 31 of the luggage support 3 are switched from the storage position to the support position, the gear transmission means 5 can be interlocked so that the wheel mechanism 4 can be switched from the stop position to the travel position. With Truck, characterized in that. [Selection] Figure 3

Description

  The present invention relates to a trolley, and more particularly to a trolley with high storage convenience.

  A truck is often used when carrying luggage at construction sites or warehouses. For example, as shown in FIGS. 1 and 2, the carriage described in Patent Document 1 is attached to a main body frame 11 and a lower end portion of the main body frame 11 and can travel along the front-rear direction. A mechanism 12 is rotatably inserted through the main body frame 11 from above, and a pair of control shafts 13 whose lower end portions are attached to the front wheel mechanism 12 are attached to the lower end portions of the main body frame 11 to support the load from below. Load supporting part 14, an auxiliary wheel mechanism 15 capable of supporting the main body frame 11 from the rear, and a gear transmission means 16 attached between the main body frame 11, the front wheel mechanism 12, and the load supporting part 14. It has the composition which has.

  As shown in FIG. 1, the front wheel mechanism 12 is arranged so as to be parallel to each other and travel along the front-rear direction as shown in FIG. As described above, it is possible to switch between the rear position of the main body frame 11 and the stop position in which the vehicle body is not allowed to travel along the front-rear direction arranged in a predetermined lateral direction substantially orthogonal to the up-down direction and the front-rear direction.

  As shown in FIG. 1, the luggage support portion 14 has a swing shaft 141 that is rotatably inserted in the lower end portion of the main body frame 11, and substantially orthogonal to the main body frame 11 as the swing shaft 141 rotates. Thus, it is possible to switch between a support position inclined forward of the main body frame 11 and a storage position leaning on the main body frame 11 and parallel to the main body frame 11 as shown in FIG.

  When the front wheel mechanism 12 is switched from the stop position to the travel position, the gear transmission means 16 is configured to be interlocked so that the luggage support portion 14 can be switched from the storage position to the support position. .

  The auxiliary wheel mechanism 15 is switched between a two-wheel state where the auxiliary wheel mechanism 15 shown in FIG. 2 is not deployed and a four-wheel state where the auxiliary wheel mechanism 15 is deployed so as to support the carriage from the rear. Can do.

  When trying to store the carriage described in Patent Document 1, the auxiliary wheel mechanism 15 is switched to the two-wheel state, and the pair of control shafts 13 are rotated so that the front wheel mechanism 12 and the luggage support portion 14 are stopped. In addition, by switching to the storage position and folding the luggage support portion 14 and the front wheel mechanism 12, it can be stored in a small storage space.

Taiwan Utility Model No. M483905

  However, although the cart described in Patent Document 1 can fold only the luggage support portion and the front wheel, there remains a drawback that the length of the main body frame cannot be reduced.

  In view of the above problems, an object of the present invention is to provide a cart that is stored in a smaller state than a conventional cart.

  In order to achieve the above object, the present invention provides a main body frame, a wheel mechanism attached to the lower end portion of the main body frame and capable of traveling along the front-rear direction, and a baggage attached to the lower end portion of the main body frame. The body frame includes a pair of first sleeves and a predetermined top dead center and a predetermined length along each of the first sleeves. A pair of second sleeves that are inserted into the first sleeve so as to be slidable in the vertical direction between the bottom dead center and a drive block at the lower end, and the pair Each of the first sleeves has a pair of rotating shafts fixed next to the lower end portions thereof, and the wheel mechanism is rotatable about the pair of rotating shafts of the main body frame, respectively. A pair installed A wheel frame, a traveling position that is attached to each of the pair of wheel frames, and is arranged so as to be parallel to each other by the rotation of the pair of wheel frames; And a pair of wheels that are arranged in a predetermined lateral direction substantially orthogonal to the front-rear direction and that can be switched between a stop position that cannot travel along the front-rear direction. The load supporting part is attached so as to be able to rotate about a swinging shaft that passes through the lower end of the rotating shaft and the swinging shaft as an axis, and corresponds to the drive block. The driven block is configured to rotate about the swing shaft when the drive block disposed at the second sleeve is pushed downward by the drive block disposed on the second sleeve. Extending from the lower end portion of the main body frame so as to be substantially orthogonal to the swing axis, and being supported by the rotation of the driven block and tilting toward the front side of the main body frame, and close to the main body frame. A support base that can be switched between a storage position and a storage position to be hung, and is attached between the wheel mechanism and the load support portion, and the support stand of the load support portion is the storage stand It further comprises gear transmission means configured to be interlocked so that the wheel mechanism can be switched from the stop position to the travel position when switched from a position to the support position. A trolley characterized by a trolley is provided.

  According to the above configuration, the present invention switches the support base of the luggage support portion from the support position to the storage position by sliding the second sleeve downward, and the wheel mechanism via the gear transmission means. By switching from the travel position to the stop position, the cart can be switched to a state where it can be stored in a storage space smaller than the conventional one.

It is sectional drawing of the state by which the auxiliary wheel mechanism of the trolley | bogie of patent document 1 is expand | deployed. It is sectional drawing which shows the state by which the trolley | bogie of patent document 1 was switched to the accommodation state. 1 is a perspective view of a preferred embodiment of a cart according to the present invention. It is a fragmentary exploded view of a wheel mechanism and a load supporting part of a preferred embodiment of the carriage of the present invention. FIG. 3 is a partial exploded view of a main body frame and members installed therein according to a preferred embodiment of the carriage of the present invention. It is a fragmentary top sectional view which shows that the load support part of preferable embodiment of the trolley | bogie of this invention is located in a support position. It is an exploded view which shows the relationship between the switch block of a preferable embodiment of the trolley | bogie of this invention, an engagement unit, and an urging | biasing unit. It is a fragmentary sectional view of the 2nd sleeve of preferable embodiment of the trolley | bogie of this invention. It is a top view which shows the state which can drive | work the preferable embodiment of the trolley | bogie of this invention. It is a fragmentary sectional view which shows the state by which preferable embodiment of the trolley | bogie of this invention was switched to the accommodation state. It is a top view which shows the state by which preferable embodiment of the trolley | bogie of this invention was switched to the accommodation state. It is a fragmentary sectional view which shows the state which the engagement protrusion of preferable embodiment of the trolley | bogie of this invention left | separated from the 2nd positioning hole.

  Hereinafter, preferred embodiments of the cart of the present invention will be described with reference to the accompanying drawings.

  FIG. 3 is a perspective view of a preferred embodiment of the cart of the present invention.

  As shown in FIG. 3, this embodiment includes a main body frame 2, a wheel mechanism 4 that is attached to a lower end portion of the main body frame 2 and can travel along the front-rear direction, and a lower end portion of the main body frame 2. A load supporting portion 3 that can be attached and can support the load from below and a switch means 6 installed on the main body frame 2 are provided.

  As shown in FIG. 3, the main body frame 2 includes a pair of first sleeves 21 parallel to each other, and a predetermined top dead center and a predetermined bottom dead center along each first sleeve 21. A pair of second sleeves 22 inserted in the first sleeve 21 so as to be slidable in the vertical direction, and a pair of turns fixed next to the lower ends of each of the pair of first sleeves 21. A first horizontal frame 24 extending substantially horizontally and having both ends connected to the lower ends of the pair of first sleeves 21 and the rotation shaft 23; and a first horizontal frame 24; A second horizontal frame 25 that is substantially parallel and both ends are inserted so as to be inserted through the upper ends of the pair of first sleeves 21, respectively, and substantially parallel to the first horizontal frame 24 and both end portions Are further curved downward and stretched by the upper ends of the pair of second sleeves 22, respectively. It is constituted by a handlebar 26 that is laterally disposed to be passed.

  FIG. 5 is a partially exploded view of a main body frame and members installed therein according to a preferred embodiment of the carriage of the present invention.

  As shown in FIG. 5, the first sleeve 21 has a first positioning hole 210 formed at the upper end, the second sleeve 22 has a drive block 62 disposed at the lower end, and slides to the top dead center. When moved, a second positioning hole 220 communicating with the first positioning hole 210 is formed.

  FIG. 4 is a partially exploded view of a wheel mechanism and a load supporting portion of a preferred embodiment of the cart of the present invention, FIG. 9 is a plan view showing a state where the preferred embodiment of the cart of the present invention can run, and FIG. It is a top view which shows the state by which preferable embodiment of the trolley | bogie of this invention was switched to the accommodation state.

  As shown in FIG. 4, the wheel mechanism 4 is attached to a pair of wheel frames 41 that are rotatably attached to a pair of rotation shafts 23 included in the main body frame 2, and a pair of wheel frames 41, respectively. 9, as the pair of wheel frames 41 rotate, the travel positions are arranged so as to be parallel to each other and can travel along the front-rear direction, and as shown in FIG. And a pair of wheels 42 that can be switched between a stop position that is arranged in a predetermined lateral direction substantially orthogonal to the direction and the front-rear direction and cannot travel along the front-rear direction.

  FIG. 6 is a partial plan sectional view showing that the load supporting portion of the preferred embodiment of the cart of the present invention is located at the support position, and FIG. 10 is a state where the preferred embodiment of the cart of the present invention is switched to the storage state. FIG.

  As shown in FIG. 4, the luggage support portion 3 is attached so as to be able to rotate around a swing shaft 32 that passes through the lower end portion of the swing shaft 23 and the swing shaft 32 as an axis. At the same time, it is installed at a position corresponding to the drive block 62, and when it is pushed by the downward slide of the drive block 62 arranged on the second sleeve 22, it rotates about the pivot shaft. As shown in FIG. 6, the driven block 61 is configured to extend from the lower end portion of the main body frame 2 so as to be substantially orthogonal to the swing shaft 32, and in conjunction with the rotation of the driven block 61, 2, and a support base 31 that can be switched between a support position inclined to the front side of FIG. 2 and a storage position leaning on the main body frame 2 as shown in FIG. 10.

  Further, as shown in FIG. 4, this embodiment is attached between the wheel mechanism 4 and the luggage support portion 3, and the support base 31 of the luggage support portion 3 is switched from the storage position to the support position. The wheel mechanism 4 further includes gear transmission means 5 configured to be interlocked so as to be switched from the stop position to the travel position.

  The gear transmission means 5 is fixed to each of a pair of transmission gears 51 fixed to both ends of the swing shaft 32 of the luggage support 3 and a pair of wheel frames 41 of the wheel mechanism 4. A pair of interlocking gears 43 that mesh with the pair of transmission gears 51. With this configuration, when the movement of the load support unit 3 is transmitted to the wheel mechanism 4 and swings so that the load support unit 3 is switched from the storage position to the support position, the pair of wheel mechanisms 4 are moved from the stop position to the wheel position. It can be linked to switch to the running position.

  FIG. 7 is an exploded view showing the relationship among the switch block, the engagement unit, and the urging unit of the preferred embodiment of the cart of the present invention, and FIG. 8 is a portion of the second sleeve of the preferred embodiment of the cart of the present invention. It is sectional drawing.

  As shown in FIGS. 7 and 8, the lower end portion of the drive block 62 is disposed on the rear side of the swing shaft 32 in the front-rear direction, and an uneven surface is formed on the side facing the swing shaft 32. A rack portion 623 and a pressing portion 624 formed on the opposite side of the rack portion 623, and an accommodation recess 622 and a pressing projection 621 are formed at the upper end portion.

  As shown in FIG. 4, the driven block 61 extends from the swing shaft 32 to the rear side in the front-rear direction and upward in the front-rear direction, and is formed so as to face the pushing portion 624 of the drive block 62. When the driven surface 611, the fixed protrusion 612 formed to be inserted into the support base 31 and fixed to the support base 31, and the rotation about the swing shaft are arranged at the storage position. A driven protrusion 613 is formed so as to be able to mesh with the rack portion 623 of the drive block 62. .

  The switch means 6 includes a drive block 62, a switch unit 65 shown in FIGS. 3 and 8, which is installed on the handle bar 26 at the upper end of the second sleeve 22, and which can move along the vertical direction. It is attached to the switch unit 65, extends from the upper end into the second sleeve 22, extends to the vicinity of the second positioning hole 220, and passes through the second positioning hole 220 at the lower end to the first positioning hole. FIG. 8 shows an engagement unit 63 formed with an engagement protrusion 631 that can be fitted in 210. The upper end is fixed to the receiving recess 622 and the lower end is fixed to the engagement unit 63. And a biasing unit 64 that always applies a biasing force toward the lower side from the second sleeve 22 to the combined unit 63. In this embodiment, the urging unit 64 is formed as a compression coil spring.

  When the engaging protrusion 631 is fitted into the first positioning hole 210 in the first sleeve 21 via the second positioning hole 220 in the second sleeve 22, the second sleeve 22 is moved to the first positioning hole 210. Engage with the sleeve 21. Thereby, the relative movement of the second sleeve 22 with respect to the first sleeve 21 can be restricted.

  In the drive block 62, as shown in FIG. 7, the accommodation recess 622 is formed so as to accommodate the urging unit 64 and the engagement protrusion 631 of the engagement unit 63.

  As illustrated in FIG. 5, the switch unit 65 includes a first switch unit 651, a second switch unit 652, and a connecting unit 653. The first switch portion 651 and the second switch portion 652 are installed at the lower end portion of the handle bar 26 so as to be movable along the vertical direction. The connecting portion 653 is installed at both ends of the second switch portion 652 so as to be movable up and down together with the second switch portion 652.

  As shown in FIGS. 5 and 7, the engaging unit 63 is pivotally supported by the connecting portion 653 as an upper end, and is bent from the pivotal portion 632 so as to be inserted into the housing recess 622 of the drive block 62. An extending portion 633 extending in the direction, a guide portion 634 that bends obliquely from the tip inserted into the accommodating recess 622 of the extending portion 633 toward the second positioning hole 220, and a second positioning hole 220 from the tip of the guide portion 634. And an abutting portion 635 that bends and folds away from the side. The engagement protrusion 631 described above is formed by the guide portion 634 and the contact portion 635.

  FIG. 12 is a partial cross-sectional view showing a state in which the engagement protrusion of the preferred embodiment of the carriage of the present invention is separated from the second positioning hole.

  According to the above configuration, the cart of the present invention is configured such that the pressing protrusion 621 presses against the engaging unit 63 and the engaging protrusion 631 at the lower end of the engaging unit 63 is fitted into the second positioning hole 220. Since the biasing unit 64 always applies a biasing force downward from the second sleeve 22 to the engaging unit 63, when the second sleeve 22 is positioned at the top dead center with respect to the first sleeve 21, The engagement protrusion 631 is pushed into the second positioning hole 220 and the first positioning hole 210 by the intervention of the pressing protrusion 621 and the urging unit 64 and the guide of the guide portion 634 constituting the engagement protrusion 631. The sleeve 22 can be engaged with the first sleeve 21.

  When the switch unit 65 is operated to move upward, as shown in FIG. 12, the engagement unit 63 is interlocked upward by the connecting portion 653 and guided by the guide portion 634 formed obliquely. The engaging protrusion 631 is separated from the first positioning hole 210 and the second positioning hole 220. Then, the engagement by the engagement protrusion 631 that is inserted through the first positioning hole 210 and the second positioning hole 220 at the same time is released, so that the second sleeve 22 can slide downward with respect to the first sleeve 21. become.

  Further, when the cart of the present invention is stored, the pushing portion of the drive block 62 installed at the lower end portion of the second sleeve 22 as shown in FIG. 6 by sliding the second sleeve 22 downward. 624 presses against the driven surface 611 of the driven block 61, and the load supporting unit 3 is interlocked with the rotation along the storage direction 81 with the swing axis of the driven block as an axis, and the support base 31 of the load supporting unit 3. Is switched from the support position to the storage position. At the same time, the driven projection 613 of the driven block 61 meshes with the rack portion 623 of the drive block 62, and the pair of transmission gears 51 included in the luggage support unit 3 transmit the rotation to the pair of interlocking gears 52 included in the wheel mechanism 4. The wheel mechanism 4 is interlocked to switch from the travel position to the stop position. As described above, the cart according to the present invention can shorten the length of the main body frame 2 and can fold the luggage support portion 3 and the wheels 42 and can move the switch unit 65 upward, that is, the switch unit 65 can be moved. When the second sleeve 22 and the first sleeve 21 are disengaged by operating so as to approach the handle bar 26 and then the second sleeve 22 is pushed downward with respect to the first sleeve 21, When the full length of the frame is shortened and the load supporting unit 3 and the wheel mechanism 4 can be simultaneously switched to the storage position or the stop position, and the second sleeve 22 is pulled up from the first sleeve 21 by operating the handle bar 26, Since the luggage support unit 3 and the wheel mechanism 4 can be simultaneously switched to the support position or the traveling position, the storage space is smaller than that of the conventional carriage. On that can be paid, it can be folding and unfolding operation is to provide a convenient truck.

  When the cart of the present invention is housed, the driven sleeve 613 of the driven block 61 engaged with the rack portion 623 of the drive block 62 as shown in FIG. However, the rack 623 is rotationally driven in the direction indicated by the deployment direction 82, and the support base 31 can be switched from the storage position to the support position in conjunction with the rotation of the driven block 61.

  The cart according to the present invention is suitable for carrying general cargo, and by sliding the second sleeve downward, the support base of the cargo support portion is switched from the support position to the storage position, and the gear transmission means. The wheel mechanism can be switched from the traveling position to the stop position via the vehicle, so that the carriage can be switched to a state where it can be stored in a smaller storage space, so that the storage space is narrow, for example, stored in a car and carried, Particularly preferred.

2 Body frame 3 Load support 4 Wheel mechanism 6 Switch means 21 First sleeve 210 First positioning hole 22 Second sleeve 220 Second positioning hole 23 Rotating shaft 24 First horizontal frame 25 Second horizontal Frame 26 Handlebar 31 Support base 32 Oscillating shaft 41 Wheel frame 42 Wheel 5 Gear transmission means 51 Transmission gear 52 Interlocking gear 61 Driven block 611 Driven surface 612 Fixed projection 613 Driven projection 62 Drive block 621 Pushing projection 622 Housing recess 623 Drive Rack 624 Pushing part 63 Engaging unit 631 Engaging protrusion 632 Pivoting part 633 Extending part 634 Abutting part 635 Guide part 64 Energizing unit 65 Switch unit 651 First switch part 652 Second switch part 653 Connecting part 71 Storage direction 72 Deployment direction

Claims (5)

A main body frame, a wheel mechanism attached to the lower end portion of the main body frame and capable of traveling along the front-rear direction, and a load support portion attached to the lower end portion of the main body frame to support the load from below A cart having
The body frame is slidable in a vertical direction between a pair of first sleeves and a predetermined top dead center and a predetermined bottom dead center along each of the first sleeves. A pair of second sleeves inserted into the sleeves and having a drive block disposed at the lower end thereof, and a pair of pivots fixed next to the lower ends of the pair of first sleeves A shaft,
The wheel mechanism includes a pair of wheel frames that are rotatably attached to the pair of rotation shafts of the main body frame, respectively, and a pair of wheel frames that are attached to the pair of wheel frames, respectively. Are arranged so as to be parallel to each other and travel along the front-rear direction, and along the front-rear direction arranged in the vertical direction and a predetermined lateral direction substantially orthogonal to the front-rear direction. It is configured to have a pair of wheels that can be switched between a stop position that cannot travel,
The luggage support portion is attached so as to be able to rotate around an oscillation shaft that passes through the lower end portion of the rotation shaft, and the rotation shaft as an axis, and corresponds to the drive block. A follower block configured to rotate about the swing shaft when the drive block disposed at a position and pushed by the lower slide of the drive block disposed on the second sleeve is pivoted; Extending forward from the lower end of the main body frame so as to be substantially orthogonal to the swing axis, and supported by the rotation of the driven block, leans toward the front side of the main body frame and leans on the main body frame. And a support base that can be switched between the storage position and
Further, the wheel mechanism is attached between the wheel mechanism and the luggage support portion, and when the support base of the luggage support portion is switched from the storage position to the support position, the wheel mechanism is moved from the stop position to the travel position. A carriage further comprising gear transmission means configured to be interlocked so as to be switched. The gear transmission means includes a pair of transmission gears that are respectively fixed to end portions of the swing shaft of the luggage support portion;
A pair of interlocking gears fixed to each of the pair of wheel frames that the wheel mechanism has,
The transmission gear and the interlocking gear mesh with each other, and are configured to transmit the movement of the load supporting portion to the wheel mechanism.
A lower end portion of the drive block is disposed on the rear side in the front-rear direction of the swing shaft, and a rack portion having an uneven surface on the side facing the swing shaft, and an opposite side of the rack portion And a pressing portion formed on
The driven block extends from the swing shaft to the rear side in the front-rear direction, and is driven by a driven surface formed to face the push portion of the drive block, and the rotation centered on the swing shaft. And a driven projection formed so as to be able to mesh with the rack portion of the drive block when arranged at the storage position by movement, and is configured to be fixed to the support base. ,
When the second sleeve slides downward, the pushing portion of the drive block pushes the driven surface of the driven block, so that the driven block rotates about the swing shaft. The cart according to claim 1. In the main body frame, a first positioning hole is formed in an upper end portion of the first sleeve, and the second sleeve is dead in the lower end portion of the second sleeve with respect to the first sleeve. A second positioning hole is formed that can communicate with the first positioning hole when sliding to a point;
Furthermore,
A switch unit installed at the upper end of the second sleeve and movable along the vertical direction;
An upper end is attached to the switch unit, extends from the upper end into the second sleeve and extends to the vicinity of the second positioning hole, and extends to the lower end through the second positioning hole. An engagement unit formed with an engagement projection that can be fitted into the positioning hole of
An urging unit having an upper end fixed to the second sleeve and a lower end fixed to the engagement unit, and constantly applying an urging force downward from the second sleeve to the engagement unit; ,
The cart according to claim 1, further comprising switch means comprising: The engagement unit is attached so that the upper end is pivotally supported by the switch unit,
The drive block disposed in the second sleeve is formed with an accommodating recess for accommodating the urging unit and the engagement protrusion of the engagement unit at an upper end portion and the urging unit of the urging unit. An upper end is fixed, and a pressing projection that presses against the engaging unit and fits the engaging projection at the lower end of the engaging unit into the second positioning hole is further formed. The cart according to claim 3, wherein the biasing unit is formed as a compression coil spring. The engagement unit is
A pivot part pivotally supported by the switch unit as an upper end;
An extending portion that is bent from the pivotal support and extends so as to be inserted into the accommodating recess of the drive block;
A guide part that bends obliquely from the tip inserted into the housing recess of the extension part toward the second positioning hole;
A contact portion that bends and turns back from the tip of the guide portion toward the side away from the second positioning hole, and the engagement protrusion is formed by the guide portion and the contact portion. The cart according to claim 4, wherein

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