JP5669366B2 - Transport cart - Google Patents

Description

  The present invention relates to a carriage that can be folded at one end of a loading platform on which various loads are placed, and that can brake a fixed wheel that is attached to the handle-side lower surface of the loading platform.

  2. Description of the Related Art Conventionally, as a transport carriage used for placing and transporting various types of luggage, there is one disclosed in Patent Document 1, for example. The carriage includes a lock lever that prevents rotation of each wheel attached to a lower surface of the loading platform having a handle, an operation member that operates both lock levers, and a spring that biases the lock lever in a direction that prevents rotation of the wheel. Etc. are provided. When the operation member is not operated, the claw portion of the lock lever is engaged with the uneven portion of the outer peripheral portion of the lock member fixed to one side surface of the wheel to prevent the rotation of the wheel and operate the operation member. Thus, the engagement between the concavo-convex part and the claw part is released so that the wheel can be rotated.

JP 2004-131001 A

  However, in such a transport cart, since the operation member for operating the lock mechanism is separately provided at the handle portion that is foldable at one end of the loading platform, The structure becomes complicated, and the operation member and the handle can be operated smoothly, such as the handle getting in the way when operating the operation member, or the operation member getting in the way when the handle is folded. It is difficult and has inconvenience that it is inferior in terms of operability and usability.

  The present invention has been made in view of such circumstances, and an object of the present invention is to dispose a brake mechanism by effectively using a handle column or the like that is foldably disposed at one end of a cargo bed. An object of the present invention is to provide a transport cart that can be smoothly folded and braked while simplifying the structure, and has excellent operability and usability.

In order to achieve such an object, the invention described in claim 1 of the present invention has a loading platform on which the load can be placed, a pair of vertical support columns, and a gripping portion that connects the upper portions of the support columns. And a pair of fixed wheels attached to the handle-side lower surface and a pair of free wheels attached to the anti-handle-side lower surface. An operation lever pivotably mounted in the vicinity of the gripping portion of the handle, and connected to both base end portions of the operation lever, fitted into the support column, and its lower end is bent to A connecting rod that is drawn inward and a brake portion that is connected to the connecting rod and bends its lower end by 90 degrees to form a brake portion having a flat outer peripheral surface parallel to the outer peripheral surface of the fixed wheel. The top is the above It is inserted into a guide member inside the bracket fixed to both ends on the handle side of the base so as to be movable up and down, and the brake portion always presses the outer peripheral surface of the fixed wheel by a spring disposed at the lower end of the guide member. A brake mechanism biased to the control lever, and when the handle is in an upright state when the hand is released from the operation lever and when the handle is in a standing state and the handle is rotated in the folding direction, the operation lever and In the folded state of the handle in which the connecting rod is integrated with the handle on the loading platform, the brake part is pressed against the outer peripheral surface of the fixed wheel to prevent the fixed wheel from rotating, and the handle is in the standing state. When the operation lever is rotated, the brake unit is separated from the fixed wheel against the urging force of the spring so that the fixed wheel can rotate. The features.

Further, an invention according to claim 2, wherein the pair of struts, the lower is rotatably supported by the rotation shaft to the bracket, between the pair of brackets, struts lower end of the handle when standing handle It is characterized in that a fixed rod is provided which allows the handle to be folded by being engaged with the handlebars to inhibit the support from being folded and being pushed down to release the handle from the lower end of the support.

Furthermore, in the invention according to claim 3 , the fixed rod is disposed so as to be movable against the urging force of the spring for the fixed rod along the guide holes provided in the pair of brackets, When standing from the folded state, the engagement with the lower end of the column is released by moving through the guide hole while contacting the inclined portion of the lower end of the column of the handle. The invention according to claim 4 is characterized in that the pivot shaft of the support column and the pivot shaft of the connecting rod with respect to the brake rod are set at a substantially coaxial position.

According to a fifth aspect of the present invention, the cargo bed is formed in a lattice shape by connecting a plurality of square pipes on the front and rear and left and right sides, and is placed on the square pipe at the outer periphery of the cargo bed. A fall prevention mechanism for preventing the fall of the load is arranged to be foldable or detachable. Furthermore, the invention described in claim 6 is characterized in that the fall prevention mechanism functions as a cargo bed during folding or mounting.

According to the first aspect of the present invention, there is provided a brake mechanism including an operation lever, a connecting rod, a brake rod, a spring, and the like. It is pressed against the surface to prevent its rotation, or when the operation lever is operated, the brake part is separated from the fixed wheel to enable its rotation, and the handle is rotated in the folding direction, so that the handle and the operation lever The connecting rods can be folded together on the carrier. As a result, the brake mechanism can be arranged by effectively using the handle column or the like that is foldably arranged at one end of the loading platform, and the handle portion can be folded and fixed wheels can be simplified while simplifying the structure of the handle portion. The brake operation can be performed smoothly.

Also, the brake portion is formed by bending the lower end of the brake rod, the upper part of the brake rod is inserted into the guide member inside the bracket so as to be movable up and down, and a spring is inserted into the brake rod at the lower end of the guide member. Therefore, the vertical movement of the brake rod becomes smooth, the brake part can reliably press the predetermined position on the outer peripheral surface of the fixed wheel to stabilize the rotation prevention state, and the brake part can damage the outer peripheral surface of the fixed wheel. It is possible to prevent sticking and the like and obtain a stable rotation state for a long time on the fixed wheel.

Further, according to the invention described in claim 2 , in addition to the effect of the invention described in claim 1 , between the brackets that rotatably support the pair of columns of the handle, between the brackets at the lower end of the handle when the handle stands. Engagement prevents the folding of the handle, and a push-down push releases the lock from the lower end of the handle post and allows the handle to be folded. The handle can be easily folded.

According to the invention described in claim 3 , in addition to the effect of the invention described in claim 2 , when the fixed rod moves along the guide hole of the bracket and the handle is raised from the folded state, The support rod returns to the standing position when the fixed rod is pushed down against the urging force of the fixed rod spring while the inclined portion of the lower end of the handle post is in contact with the fixed rod. Is automatically restored and no operation is required, and the handle can be easily raised.

Further, according to the invention described in claim 4 , in addition to the effects of the inventions described in claims 1 to 3 , the rotation shaft of the handle column and the rotation shaft of the connecting rod with respect to the brake rod are set at a substantially coaxial position. Therefore, the rotation of the handle and the rotation of the connecting rod and the operating lever can be performed substantially coaxially, and the folding operation and the standing operation of the handle can be performed smoothly and satisfactorily.

According to the fifth aspect of the present invention, in addition to the effects of the first to fourth aspects, the loading platform is formed in a lattice shape by connecting the square pipes, and is placed on the loading platform on the outer square pipe. The fall prevention mechanism that prevents the fall of the loaded cargo is foldable or detachable, so the fall prevention mechanism can reliably prevent the fall of the cargo on the cargo bed, and stable placement on the luggage on the cargo bed・ It is possible to obtain the transport state, and by folding or removing the fall prevention mechanism, it is possible to place and transport luggage larger than the size of the cargo bed, and it can be used regardless of the size of the luggage and is excellent in versatility. A transport cart can be obtained.

Furthermore, according to the invention described in claim 6 , in addition to the effect of the invention described in claim 5 , since the fall prevention mechanism functions as a loading platform when folded or mounted, for example, by increasing the area of the loading platform, The load placed on the loading platform can be placed and transported in a stable state.

The perspective view seen from the approximate front side showing one embodiment of the transportation cart concerning the present invention. The back view Plan view Partially broken back view showing the main part of the brake mechanism The side view Rear view showing the fixed rod Side view showing the operating lever Side view showing the bottom of the handle column Side view showing the pivoting motion of the handle post Plan view showing the square pipe of the cargo bed Sectional view along the AA line of FIG. The perspective view similar to FIG. 1 which shows the state which folded the handle | steering-wheel The back view Side view of the brake part Plan view of cargo bed showing a modification of the present invention BB line view of FIG. 15

The best mode for carrying out the present invention will be described below in detail with reference to the drawings.
1 to 14 show an embodiment of a transport cart according to the present invention. As shown in FIGS. 1 to 3, the transport cart 1 includes a cargo bed 2 that is rectangular in plan view, a handle 3 that is foldable on one end in the longitudinal direction of the cargo bed 2, and four corners of the cargo bed 2. A pair of fixed wheels 4 and a pair of free wheels 5 disposed on the lower surface, and a brake mechanism 6 (not shown in FIG. 3) disposed between the handle 3 and the loading platform 2 are provided.

  The loading platform 2 includes a plurality of aluminum (in the figure, five) rectangular pipes 2a to 2c having a rectangular (or square) cross section, that is, a rectangular pipe 2a in the horizontal direction and an outer peripheral pipe having a substantially U-shape in plan view. A square pipe 2b made of 3 and a square pipe 2c made of three vertical pipes are connected by welding or the like to form a lattice shape. And by the upper surface of each square pipe 2a-2c, the loading platform 2 is formed so that it may have a mounting surface with a length of about 750 mm and a width of about 480 mm, for example. Further, the square pipes 2a to 2c are formed by extruding an aluminum material, and as shown in FIGS. 10 and 11, an uneven slip stopper 7 is formed on the upper surface of the square pipes 2a to 2c in the longitudinal direction. It is integrally formed over.

At this time, the anti-slip 7 is formed by, for example, a slit 7a having a triangular cross section as shown in FIG. 11 (a), or formed by a protrusion 7b having a triangular cross section as shown in FIG. 11 (b). ing. Further, each of the square pipes 2 to 2c is formed with two strips 7 having a plurality of slits 7a or protrusions 7b provided in parallel with each other, and a smooth surface 8 is formed between the slips 7. . Note that the slits 7a and the protrusions 7b of the anti-slip 7 provided in each of the square pipes 2a to 2c are not limited to a triangular cross section but may be a trapezoidal cross section, and the number of the anti-slip 7 is not limited to two. Of course, three or more strips can be provided depending on the size of the pipes 2 to 2 c.

  In addition, the square pipe 2b which is an outer peripheral pipe excluding the square pipe 2a of the loading platform 2 is formed in a substantially U shape in plan view by bending one square pipe 90 degrees at two locations, A predetermined radius is formed in plan view. Then, the vertical portion of the square pipe 2b of the cargo bed 2 and each square pipe 2c are provided with a non-slip 7 directed in the vertical direction (see FIG. 10), and the lateral direction of the load placed on the cargo bed 2 ( Slip to the side) is suppressed. Further, a slip stopper 7 oriented in the lateral direction (see FIG. 10) is provided in the lateral portion of the square pipe 2b to prevent the load placed on the cargo bed 2 from slipping forward (counter handle direction). It has come to be.

  As shown in FIGS. 1 to 3, the handle 3 is connected to a pair of support columns 3 a arranged vertically at both ends of the loading platform 2 and an upper portion of the support column 3 a so as to be substantially outward in the loading platform 2. A gripping portion 3b made of a round pipe fixed in a horizontal state and having a substantially U-shape in plan view, and a pair of connecting pipes 3c for connecting an intermediate portion in the height direction of the column 3a and the upper portion are provided. As the support 3a of the handle 3, a square pipe having the same shape as that of the square pipes 2a to 2c of the cargo bed 2 is used, and an uneven slip stopper 7 similar to the square pipes 2a to 2c is provided on the surface of the cargo bed 2 side. It is integrally formed. Note that an operation lever 16 of a brake mechanism 6 (described later) is disposed in the vicinity of the grip portion 3b above the support column 3a so as to be rotatable in the vertical direction. A resin cap 3d is attached to the upper end opening of the column 3a.

  And the support | pillar 3a is each supported by the bracket 9 of the U-shaped cross section welded and fixed on the both ends of the square pipe 2b of the loading platform 2 so that rotation is possible. That is, as shown in FIG. 8 and FIG. 9, the column 3 a is formed with an inclined portion 10 that is obliquely cut at the lower end thereof, and a pair of side walls of each bracket 9 is formed in the direction of arrow A by the rotation shaft 11. It is rotatably supported. In addition, inclined guide holes 12 are formed on the respective side walls of the pair of brackets 9 at the obliquely rear lower portion of the rotating shaft 11, and one fixed rod 13 is horizontally disposed in the four guide holes 12. It is inserted in the state. The fixing rod 13 is loosely fitted into the guide hole 12 with both ends thereof positioned outside the side walls outside the brackets 9 and being prevented from coming off from the guide hole 12 by washers and pins (not shown).

  As shown in FIG. 6, a spring locking hole (or a spring locking portion) is provided outside the side wall inside the bracket 9 of the fixed rod 13, and the spring locking hole and the bracket 9 of the rotating shaft 11 are provided. The fixed rod spring 14 is locked between a spring locking hole (or a spring locking portion) provided in a portion protruding outside the inner side wall of the fixing rod. With this fixed rod spring 14, the fixed rod 13 is always pulled toward the rotating shaft 11, and the fixed rod 13 is normally brought into contact with the upper end of the guide hole 12. In this state, as shown in FIG. 8, the fixed rod 13 is brought into contact with and engaged with the lower end of the rear surface of the support column 3a, so that the rotation of the support column 3a in the direction of arrow A is prohibited.

  Then, the fixing rod 13 is attached to the fixing rod spring 14 as shown by an arrow B in FIG. 9 when an operator using the transport carriage 1 pushes the fixing rod 13 downward with a foot as shown by an arrow G in FIG. It moves downward along the guide hole 12 against the force (tensile force), the engagement state between the fixing rod 13 and the lower end of the rear surface of the support column 3a is released, and the support column 3a rotates in the direction of arrow i. As will be described later, the handle 3 is set in a folded state.

  As shown in FIGS. 1 to 3 and 5, the fixed wheel 4 and the free wheel 5 are formed of casters with attachment plates 4 a and 5 a each having an outer peripheral portion formed of a rubber material. The pair of fixed wheels 4 attached to the lower surfaces of both ends (the handle 3 side) of the loading platform 2 can rotate only in the longitudinal direction (front-rear direction) of the loading platform 2. Further, the pair of free wheels 5 attached to the lower surfaces of both sides of the other end of the cargo bed 2 (on the side opposite to the handle) are rotatable in the same direction as the fixed wheels 4 and 360 degrees in plan view.

The brake mechanism 6 is provided at the lower end of an operating lever 16 formed of a round pipe that is rotatably disposed in the vicinity of the gripping portion 3b of the handle 3 and has a shape similar to that of the gripping portion 3b. The brake rod 17 abuts against the outer peripheral surface 4 b of the fixed wheel 4 to prevent the rotation of the fixed wheel 4, and the connecting rod 18 that connects the upper end of the brake rod 17 and the operation lever 16. And a spring 19 that always attaches the brake rod 17 in the pressing direction.

  As shown in FIG. 7, the base end of the operation lever 16 is rotatably supported on the upper part of the pair of pillars 3a by the rotation shaft 20, and is also supported with respect to the grip 3b of the handle 3. The operation lever 16 can be rotated while the operator grips the gripping portion 3b while being inclined with a predetermined angle. And the upper end of the said connecting rod 18 is connected with the end part located in the support | pillar 3a of the operation lever 16 by the rotating shaft 25 which consists of a pin etc. so that rotation is possible.

  The connecting rod 18 is formed of an aluminum rod or the like having a diameter of about 5 mm, and is inserted through a pair of support columns 3a. As shown in FIG. 4, the lower end of the connection rod 18 is bent into an L shape, and is formed on the inner wall of the support column 3a. It is pulled out from the provided guide hole 21 (see FIG. 2) to the outside (inside) of the column 3a. And the upper end of the said brake rod 17 is connected with the lower end of the connecting rod 18 pulled out from the support | pillar 3a via the rotating shaft 22 which consists of pins etc. so that rotation is possible. The rotating shaft 22 of the connecting rod 18 is set at a position substantially coaxial with the rotating shaft 11 that supports the support column 3a so as to be rotatable on the bracket 9.

  The brake rod 17 is supported by a guide member 23 fixed to the outer surface of the inner side wall of the bracket 9 so as to be movable up and down. At this time, as shown in FIGS. 4 and 6, the guide member 23 has a substantially cylindrical shape having a fixing portion 23a fixed to the bracket 9 by welding, and a fixing portion 23a fixed in a vertical state to the fixing portion 23 and having a guide hole therein. The guide portion 23b is provided. And the upper part of the brake rod 17 is penetrated by the guide hole of the guide part 23b so that an up-down movement is possible. The brake rod 17 is formed of an aluminum rod or the like having a diameter of about 10 mm. As shown in FIGS. 4 and 5, the lower part of the brake rod 17 is fixed to the tip (lower end) by bending it 90 degrees inward and outward. A columnar brake portion 17a parallel to the outer peripheral surface 4b of the wheel 4 is integrally formed. The brake portion 17a is set so as to contact the outer peripheral surface 4b obliquely rearward of the fixed wheel 4.

  Further, a spring support plate 24 (see FIG. 4) is provided above the brake portion 17a of the brake rod 17, and the brake rod 17 between the spring support plate 24 and the lower surface of the guide portion 23b of the guide member 23 is provided. The spring 19 in a compressed state is inserted. With this spring 19, the brake rod 17 is constantly urged in the direction of the arrow C in FIGS. 4 and 5, that is, the brake portion 17 a is always in contact with the outer peripheral surface 4 b of the fixed wheel 4 with a predetermined pressure, and the fixed wheel 4 is rotated. It is set to block. The brake portion 17a integrally formed at the tip of the brake rod 17 is formed in a circular cross section. For example, as shown by a two-dot chain line a in FIG. You may comprise so that a predetermined | prescribed brake performance may be obtained.

  Next, an example of a method for using the transport cart 1 configured as described above will be described. First, at the time of carrying a load in a normal use state, the handle 3 is set to an upright state as shown in FIG. In the standing state of the handle 3, as shown by the solid line in FIG. 8, the fixed rod 13 is positioned at the upper end of the guide hole 12 by the urging force of the fixed rod spring 14, and the fixed rod 13 is located at the lower end of the rear surface of the column 3a. Engagement and rotation in the direction of arrow A are prohibited.

  When the hand is not released from the operating lever 16, the brake rod 17 connected to the operating lever 16 via the connecting rod 18 is pressed downward by the urging force of the spring 19 to fix the brake portion 17a. The fixed wheel 4 is prevented from rotating by contacting the outer peripheral surface 4b of the wheel 4 with a predetermined pressure. As a result, the transport cart 1 is locked and prohibited from moving. At this time, the columnar brake portion 17a of the brake rod 17 abuts the rubber outer peripheral surface 4a of the fixed wheel 4 with a predetermined pressure from the width direction thereof, whereby the brake portion 17a contacts the outer peripheral surface 4a of the fixed wheel 4. The rotation of the fixed wheel 4 is prevented in a state where damage due to biting or the like is prevented.

  In this state, when the load is placed on the loading platform 2 and the operation lever 16 is turned downward while gripping the grip portion 3b of the handle 3, the connecting rod 18 is raised. At this time, the lower end of the connecting rod 18 moves along the guide hole 21 provided on the lower inner side of the column 3a. When the connecting rod 18 rises, the brake rod 17 connected to the lower end of the connecting rod 18 rises against the urging force of the spring 19, and as shown by a solid line in FIG. Is separated from the outer peripheral surface 4a of the fixed wheel 4 by a predetermined distance L.

  The fixed wheel 4 can be rotated by the separation of the brake portion 17a, and the carrier cart 1 is predetermined by pushing or pulling the handle 3 in a predetermined direction while rotating the operation lever 16 while grasping the grip portion 3b. Can be moved in the direction. When the load is transported by the transport cart 1, the uneven slip stoppers 7 provided on the square pipes 2a to 2c of the load platform 2 prevent the load from slipping sideways or forward as described above. It can be transported without dropping from the loading platform 2.

  When the transport cart 1 is moved to a predetermined position and the load is unloaded at that position, the brake rod 17 and the connecting rod are released by the biasing force of the spring 19 by releasing the hand from the operation lever 16 to the non-operation position. As 18 descends, the brake portion 17a descends and comes into contact with the outer peripheral surface 4b of the fixed wheel 4 at a predetermined pressure. Thereby, rotation of the fixed wheel 4 is prevented and the movement of the transport carriage 1 is prohibited, and in this state, the load on the loading platform 2 is unloaded. That is, when the transport cart 1 is used for transporting luggage, the handle 3 is raised and the operation lever 16 is rotated downward while holding the grip portion 3b, or the hand is released from the operation lever 16. By setting the non-operating position, the fixed wheel 4 can be prevented from rotating or can be rotated.

  On the other hand, when the handle 3 is folded and stored without using the carriage 1, it is performed as follows. That is, the fixed rod 13 disposed at the lower portion of the handle 3 is pushed down with, for example, a foot or a hand, and the fixed rod 13 is moved downward along the guide hole 12 of the bracket 9 against the urging force of the fixed rod spring 14. Let When the fixed rod 13 is positioned at the lower end of the guide hole 12, the engaged state between the both ends of the fixed rod 13 and the lower end of the rear surface of the pair of support pillars 3a is released. In this state, the handle 3 is folded in the direction shown in FIG. Rotate in the direction.

  At this time, the handle 3 is pivoted about the pivot shaft 11 with respect to the support rod 3 with respect to the bracket 9, and the connecting rod 18 inserted into the support column 3 a has a lower end of the brake rod 17. This is performed by rotating about the rotation shaft 22 with respect to the upper end. In these rotations, the rotation shaft 11 and the rotation shaft 22 are set at substantially coaxial positions, so that the rotation operation of the support column 3a with respect to the bracket 9 and the rotation operation of the connecting rod 18 with respect to the brake rod 17 are substantially omitted. Synchronously, the folding operation of the handle 3 is performed smoothly.

  As a result, the handle 3 and the operation lever 16 and the connecting rod 18 of the brake mechanism 6 are integrated and folded on the loading platform 2 as shown in FIGS. Since the operation lever 16 is in the non-operation position when the handle 3 is folded, the brake portion 17a of the brake rod 17 contacts the outer peripheral surface 4b of the fixed wheel 4 as shown in FIG. The carriage 1 is prevented from moving when the handle 3 is folded.

  Then, when the handle 3 is erected in an attempt to use the transport cart 1 from the folded state, it can be performed by rotating the folded handle 3 in the erection direction. At the time of this standing, the fixed rod 13 is positioned at the upper end of the guide hole 12, and when the support column 3a stands up in this state, the inclined portion 10 at the lower end of the support column 3a is fixed to the fixed rod as shown by a three-dot chain line b in FIG. The support rod 3a rotates while pushing down the fixed rod 13 downwardly as shown by an arrow B against the urging force of the fixed rod spring 14 while abutting against the spring 13. When the support column 3a is rotated to be in a substantially vertical state, the lower end of the support column 3a gets over the fixed rod 13, and at the same time, the fixed rod 13 moves up the guide hole 12 by the urging force of the fixed rod spring 14, and the upper end thereof Set to position.

  Thereby, the fixed rod 13 and the rear surface lower end of the column 3a are set to the engaged state, and the rotation of the column 3a is prohibited and set to the use state. In other words, the folding operation of the handle 3 is performed by pushing down the fixed rod 13 downward with a foot or the like and rotating the column 3a by hand, and the standing operation of the handle 3 is to gradually raise the handle 3. Thus, the lower end of the column 3a moves the fixed rod 13 to the initial state, that is, the handle 3 can be automatically set to the upright state only by raising the handle 3 without operating the fixed rod 13. .

  As described above, according to the transport carriage 1, when the operation lever 16 of the brake mechanism 6 is not operated, the brake portion 17 a is pressed against the outer peripheral surface 4 b of the fixed wheel 4 to prevent the rotation of the operation lever 16. During operation, the brake unit 17a is separated from the fixed wheel 4 to be rotated, and the handle 3 is rotated in the folding direction, so that the handle 3 is integrated with the operation lever 16, the connecting rod 18 and the like. 2 can be folded. Therefore, the operation lever 16 and the connecting rod 18 of the brake mechanism 6 can be disposed by effectively using the support column 3a of the handle 3 that is foldably disposed at one end of the loading platform 2. While simplifying the configuration, the folding operation of the handle 3 and the locking (braking) operation of the fixed wheel 4 can be performed smoothly.

  In particular, since the operating lever 16 and the brake rod 17 are connected by an aluminum connecting rod 18 inserted into the support column 3a, the operation of the operating lever 16 is directly and efficiently transmitted to the brake rod 17, so that the wire Compared to the case where the brakes 17a are connected to each other, it is possible to smoothly and surely shift the stationary wheel 4 to the rotation-prevented state or the rotatable state by the brake portion 17a, and to prevent the connecting rod 18 from being rusted. Thus, it is possible to obtain the transport cart 1 having stable braking performance over a long period of time.

  Further, between the brackets 9 that rotatably support the pair of support columns 3a of the handle 3, when the handle 3 is used, the lower end of the handle 3 is engaged with the lower end of the support column 3a to prohibit its folding, and by pushing down, Since the fixed rod 13 that disengages the lower end of the column 3a and enables the handle 3 to be folded is provided, the folding operation of the handle 3 can be performed simply by pressing the fixed rod 13 with, for example, a foot. be able to. Further, when the fixed rod 13 moves along the guide hole 12 of the bracket 9 and the handle 3 is raised from the folded state, the fixed rod 13 is in contact with the inclined portion 10 at the lower end of the column 3a of the handle 3 while being fixed. Since the urging force of the spring 14 automatically returns to the standing position, when the handle 3 is raised, the fixed rod 13 is automatically returned to eliminate the need for the operation, and the handle 3 can be easily raised. be able to.

  Further, the brake portion 17a is integrally formed by bending the lower end of the brake rod 17, and the upper portion of the brake rod 17 is inserted into the guide portion 23b of the guide member 23 so as to be movable up and down. A spring is connected to the lower end of the guide portion 23b. 19 is provided, the structure of the brake mechanism 6 can be simplified, and the vertical movement of the brake rod 17 is smoothed by the guide portion 23b, so that the brake portion 17a can reliably secure a predetermined position on the outer peripheral surface 4b of the fixed wheel 4. To prevent rotation of the fixed wheel 4 from being stabilized.

  Further, since the rotating shaft 11 of the support column 3a of the handle 3 and the rotating shaft 22 of the connecting rod 18 with respect to the brake rod 17 are set at substantially the same coaxial position, the rotating operation of the handle 3, the connecting rod 18 and the operation. The rotating operation of the lever 16 and the like can be substantially synchronized, and the folding operation and the standing operation of the handle 3 can be performed satisfactorily. Accordingly, it is possible to obtain the transport cart 1 that is excellent in operability when the handle 3 is folded or standing.

  Furthermore, since the loading platform 2 is formed in a lattice shape by connecting a plurality of square pipes 2a to 2c, and uneven slip stoppers 7 are integrally formed on the upper surfaces of the respective square pipes 2a to 2c, the loading platform 2 itself The weight can be reduced, and the slippage of the load on the loading platform 2 can be suppressed by the anti-slip 7 so that a stable loading / transporting state can be obtained on the loading on the loading platform 2. In addition, since the anti-slip 7 is uneven and does not protrude on the loading platform 2, it does not affect the size of the luggage placed on the loading platform 2, and the loading / loading of the luggage larger than the loading platform 2 is not affected. It is possible to provide the transport cart 1 that is excellent in versatility and convenience such that it can be transported and used regardless of the size of the luggage.

  By the way, in the said embodiment, although the uneven | corrugated slip stopper 7 was integrally formed in each square pipe 2a-2c of the loading platform 2, the fall from the loading platform 2 etc. was suppressed, For example, FIG.15 and FIG.16. As shown in FIG. 2, a fall prevention mechanism 27 can be separately provided on the loading platform 2. That is, a pair of left and right fall prevention plates 27a are arranged on the left and right square pipes 2b of the cargo bed via a pair of hinges 27b so as to be rotatable (foldable) with respect to the square pipe 2b. At this time, the fall prevention plate 27a is erected in a vertical state on the square pipe 2b in the erected state shown by a solid line in FIG. 16, and is rotated from the erected state as indicated by an arrow D in FIG. In the folded state indicated by the dotted line, the tip portion is placed on the square pipe 2c. Thereby, the fall prevention board 27a functions as a mounting surface of the loading platform 2 in the folded state.

  According to this embodiment, since the fall prevention mechanism 27 is foldably provided on the square pipe 2b of the lattice-like cargo bed 2, the fall prevention plate 27a is erected to ensure that the cargo on the cargo bed 2 is dropped. It is possible to prevent such a situation, and it is possible to easily obtain a stable placement / transport state for the load on the loading platform 2. In addition, by folding the fall prevention plate 27a, it becomes possible to place and transport a load larger than the size of the loading platform 2, or by using the fall prevention plate 27a to widen the loading surface of the loading platform 2 and to stably load the load. For example, it is possible to obtain substantially the same operational effects as in the above-described embodiment. In the case of this example, the fall prevention plate 27a is not foldable but can of course be detachably attached to the square pipe 2b etc. of the loading platform 2, and the square pipe is disposed on the surface of the fall prevention plate 27a. The anti-slip 7 similar to 2a to 2c may be integrally formed.

  In the above embodiment, the concave and convex anti-slip 7 is integrally formed on each of the square pipes 2a to 2c and the column 3a of the loading platform 2, or the fall prevention mechanism 27 is separately provided. However, the present invention is limited to this. Alternatively, a general loading platform that does not have the uneven slip stopper 7 and the fall prevention mechanism 27 can be used. The loading platform 2 itself is not limited to being used in a lattice shape. For example, a locking portion is provided on the back surface of an aluminum plate body, and this plate body is attached to and detached from the square pipes 2b and 2c of the lattice loading platform 2. As a pipe that forms a lattice-shaped cargo bed, or uses a loading platform made of a flat plate-shaped plate made of resin, it can be locked to form a planar mounting surface. It is also possible to use a round pipe instead.

  In the embodiment, the lower end of the brake rod 17 of the brake mechanism 6 is bent so that the brake portion 17a having the same outer diameter as that of the brake rod 17 is integrally formed. A configuration in which a substantially cylindrical brake portion having a diameter larger than 17 is fixed by welding or the like can be adopted, and the shape of the brake portion 17a is also an appropriate shape other than the above-described example that does not damage the outer peripheral surface 4b of the fixed wheel 4. Can be adopted. Furthermore, the configuration of the handle 3 and the size of the loading platform 2 in the above embodiment are merely examples. For example, the support column 3a and the gripping portion 3b of the handle 3 are integrated, or the guide portion 23 of the brake mechanism 6 is fixed. The rod spring 14 or the like is covered with a cover, or a cover made of metal or resin or the like for smoothly engaging the fixed rod 13 is attached to the inclined portion 10 of the support column 3a. An appropriate configuration can be adopted without departing from the gist of the invention.

  INDUSTRIAL APPLICABILITY The present invention can be used for all transport carts used for transporting luggage in various fields such as factories, warehouses, transport vehicles such as trucks, airports, farmers, and general households.

  DESCRIPTION OF SYMBOLS 1 ... Carriage trolley, 2 ... Loading platform, 2a-2c ... Square pipe, 3 ... Handle, 3a ... Strut, 3b ... Grip part, 4 ... Fixed wheel, 4b ... outer peripheral surface, 4 ... free wheel, 6 ... brake mechanism, 7 ... anti-slip, 7a ... slit, 7b ... ridge, 8 ... smooth surface, 9 ... Bracket, 11 ... rotating shaft, 12 ... guide hole, 13 ... fixed rod, 14 ... spring for fixed rod, 16 ... operating lever, 17 ... brake rod, 17a ..Brake part, 18 ... connecting rod, 19 ... spring, 20 ... rotation shaft, 21 ... guide hole, 22 ... rotation shaft, 23 ... guide member, 23b ..Guide part 24 ... Spring support plate 25 ... Rotating shaft 27 ... Fall prevention mechanism 27a Fall prevention plate, 27b ··· hinge.

Claims (6)

A loading platform capable of placing a load on the upper surface, a handle having a pair of vertical support columns and a gripping portion connecting the upper portions of the support columns and being foldable at one end of the loading platform, and a handle of the loading platform A pair of fixed wheels attached to the lower side surface and a pair of free wheels attached to the lower surface opposite the handle,
An operation lever that is pivotally attached in the vicinity of the grip portion of the handle, and is connected to both base ends of the operation lever, is inserted into the support column, and its lower end is bent and pulled out to the inside of the support column. The connecting rod and the brake rod connected to the connecting rod and bent at the lower end by 90 degrees are integrally formed with a parallel outer peripheral surface of the fixed wheel and a flat outer peripheral surface. So that the brake part is constantly pressed against the outer peripheral surface of the fixed wheel by a spring disposed at the lower end of the guide member. A brake mechanism comprising an energized brake rod ,
When the handle is in an upright state when the hand is released from the operation lever, and when the handle is folded in the folding direction so that the operation lever and the connecting rod are folded together with the handle on the loading platform. In this case, the brake part is pressed against the outer peripheral surface of the fixed wheel to prevent the fixed wheel from rotating,
When the handle is in an upright state, when the operation lever is rotated, the brake unit is separated from the fixed wheel against the urging force of the spring to enable rotation of the fixed wheel. . The pair of struts are supported by the bracket so that the lower part of the pair of struts can be rotated by a pivot shaft, and when the handle stands up between the pair of brackets, the bottom end of the handle is engaged to prevent the support from being folded. The carrier cart according to claim 1, further comprising a fixing rod that is disengaged from the lower end of the column of the handle by being pushed down to allow the handle to be folded . The fixed rod is arranged to be movable against the urging force of the fixed rod spring along guide holes provided in the pair of brackets, respectively, and when the handle is erected from the folded state, The carriage according to claim 2 , wherein the carriage is moved in the guide hole while coming into contact with the inclined portion at the lower end to release the engaged state with the lower end of the support column . The transport cart according to any one of claims 1 to 3 , wherein a pivot axis of the support column and a pivot axis of the connecting rod with respect to the brake rod are set at a substantially coaxial position . The cargo bed is formed in a lattice shape by connecting a plurality of square pipes on the front and rear and left and right sides, and a fall prevention mechanism for preventing the fall of the load placed on the cargo bed is folded on the square pipe on the outer peripheral edge thereof. The transport cart according to any one of claims 1 to 4 , wherein the transport cart is arranged so as to be removable or detachable . The transport cart according to claim 5 , wherein the fall prevention mechanism functions as a loading platform when folded or mounted .

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