JP2006151317A - Leg portion retractable hand cart - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a leg portion retractable hand cart capable of attaining ease of operation. <P>SOLUTION: In this cart 1, an accommodating body 3 for accommodating a carried article is attached on a loading portion 5, and a leg portion 7 which can be folded supports the loading portion 5. In the cart 1, a pair of interlocking mechanisms 8 is attached so as to be positioned at an upper portion of a front leg 71. A trigger lever 84 of the interlocking mechanisms 8 is brought into contact with a rear edge portion of a bracket 95 of a vehicle AM to be rotated rearward when the cart 1 is housed in a cargo room LS, a pole 83 is rotated to release engagement with a ratchet 71b of the front leg 71 to make the front leg 71 rotating condition. When the cart 1 is pulled out of the cargo room LS, the trigger lever 84 is brought into contact with a font edge portion of the bracket 95 to be rotated forward, and to be fitted in a pushing groove 71b2 of the ratchet 71b, thus pushing the front leg 71 to be rotated forward. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a leg retractable handcart.

As a prior art, there has been a hand cart that is provided with a pair of support legs on the lower surface of a table on which a transported object is placed, and which can be folded (see, for example, Patent Document 1). According to this prior art, the support leg can take two positions, that is, an upright state in which the support leg can travel and a folded state. However, according to this prior art, the cart is pulled out from the state in which the support leg is folded and mounted on the loading platform of the vehicle, the tip end portion of the support leg is dropped by its own weight, and is changed to a state where it can run on the ground. In some cases, if the height of the loading platform is insufficient, the support legs do not stand up sufficiently and remain fixed. In this case, it is necessary for the transporter to lift the table by himself and fix the support legs in an upright state, and the workability is poor.
JP-A-4-11558

  The present invention has been completed based on the above circumstances, and an object thereof is to provide a leg retractable handcart with good operability.

  As means for achieving the above-mentioned object, the invention of claim 1 comprises a loading part on which a transported article is placed, and a leg part having a wheel at the lower end part and supporting the aforementioned writing part from below. In the leg retractable handcart that can be mounted on a vehicle by switching between an upright state in which the leg can run and a retracted state in which the size in the vertical direction is reduced by folding. When engaging and holding the leg in the upright state and being stored in the vehicle, the engagement with the leg is released and when the leg is pulled out from the vehicle, the leg is The leg-retractable handcart is provided with an interlocking mechanism that is pressed to change to the standing state.

  According to a second aspect of the present invention, the interlocking mechanism includes a trigger means that contacts a part of the vehicle in one direction and rotates to one side, and engages with the leg portion to bring the leg portion into the upright state. Holding means, and when stored in the vehicle, has a locking means that is rotated by abutting on the trigger means rotated to the one side, and is disengaged from the leg portion, When the vehicle is pulled out from the vehicle, the trigger means abuts against a part of the vehicle in the opposite direction and rotates to the other side, thereby pressing the leg portion to change to the standing state. The leg retractable wheelbarrow according to claim 1, characterized in that:

<Invention of Claim 1>
Engage with the leg to hold the leg in an upright state and when retracted into the vehicle, the engagement with the leg is released, and when pulled out from the vehicle, the leg is pressed. Equipped with an interlocking mechanism that changes to the standing state, it can be stored by simply pushing it into the vehicle, and even if the storage part of the vehicle is not high enough, it can be pulled out from the vehicle to bring the legs upright. It is possible to change.

<Invention of Claim 2>
The interlock mechanism is a part of the vehicle, trigger means that abuts in one direction and rotates to one side, and engages with the leg portion to hold the leg portion in an upright state, and when stored in the vehicle, There is a locking means that is rotated by coming into contact with the trigger means that is rotated to one side, and is disengaged from the leg portion. When pulled out from the vehicle, the trigger means By contacting the opposite direction and rotating to the other side, the leg is pressed and changed to the standing state, so the leg is linked with the loading and unloading to the vehicle with a simple structure. Can be reliably changed between the standing state and the retracted state.

  An embodiment of the present invention will be described with reference to FIGS. In the description, the left side of FIG. A cart 1 (corresponding to a leg retractable handcart of the present invention) according to the present embodiment includes a container 3 for storing a transported object (not shown), a loading part 5 on which the container 3 is placed, and a loading part 5. The leg part 7 supported from the downward direction is provided. The container 3 is detachably attached to the loading unit 5. The container 3 is provided with a frame 31 formed in a substantially rectangular parallelepiped shape with a metal wire, and usually a box member in which a transported article is stored is housed therein. The container 3 is slidably attached to the loading unit 5.

  The loading unit 5 is formed by fixing an operating body 52 to the rear of a support body 51 that is formed symmetrically by bending a highly rigid metal pipe material. The operation body 52 is also formed by bending a pipe material similar to that of the support body 51 left and right symmetrically, and a handle 52a that is manually pushed by a transport operator extends in the left and right direction at the upper end portion thereof. A connection beam 53 is fixed to the lower side of the handle 52a so as to connect the left and right, thereby improving the rigidity of the operation body 52. A pair of guide rails 54 extending horizontally in the left-right direction when viewed from the handle 52a side are fixed to the upper side of the support 51 so as to be parallel to each other by welding or the like. The container 3 moves on the guide rail 54.

  Further, at the front end portion of the support body 51, as will be described later, when the cart 1 is mounted in the luggage compartment LS of the vehicle AM, two pairs of left and right guide rollers 55 that perform a guiding function are rotatably attached. Yes. The guide roller 55 is formed of a material that is less aggressive to other members such as synthetic rubber or synthetic resin material. Furthermore, a pair of left and right engaging portions 56 for fixing the cart 1 to the luggage compartment LS are provided at the lower end portion of the operation body 52 so as to protrude outward.

  The leg portion 7 is formed by bending a highly rigid metal pipe material, and has a pair of left and right front legs 71 whose upper ends are rotatably connected to the front end of the loading portion 5. A front beam 72 is provided between the two and couples them together. A pair of left and right rear legs 73 formed in an L shape with a pipe material similar to that of the front legs 71 is connected to a substantially intermediate position in the vertical direction of the front legs 71 so as to be rotatable at the front ends thereof. A rear beam 74 is connected between the legs 73. Casters 75 (corresponding to wheels of the present invention) are rotatably attached to the lower ends of the front legs 71 and the rear legs 73, respectively. The caster 75 is rotatable in the horizontal direction with respect to the front leg 71 or the rear leg 73, so that the traveling direction of the cart 1 can be easily changed.

  Further, a pair of left and right support links 76 are provided between the upper side of the support body 51 of the loading unit 5 and the rear leg 73, and these are rotatably connected to the support body 51 and the rear leg 73 at both ends thereof. ing. As a result, the leg portion 7 can be changed between an upright state in which the cart 1 can travel (shown in FIG. 13) and a retracted state in which the size of the vertical direction of the cart 7 is reduced (shown in FIG. 16). ing.

  A pair of interlocking mechanisms 8 are attached to the left and right sides of the cart 1 so as to be positioned above the front legs 71. Hereinafter, the interlocking mechanism 8 will be described with reference to FIGS. Since the pair of interlocking mechanisms 8 are configured to be symmetrical with each other, only the interlocking mechanism 8 on one side will be described. The interlocking mechanism 8 has a plate 81 fixed to the support body 51, and a vessel 82 is fixed to the plate 81.

  An axle 82 a is attached to the vessel 82 so as to protrude inward of the loading unit 5. A rotating portion 71a formed at the upper end portion of the front leg 71 is rotatably attached to the axle 82a by a pivot pin (not shown). A pair of rotational engagement bodies 71a1 and 82a1 project from the opposing surfaces of the rotating portion 71a and the axle 82a, respectively. The pair of rotation engaging bodies 71a1 and 82a1 are disposed at positions facing each other at 180 degrees on the circumference on the facing surfaces of the rotating portion 71a and the axle 82a. The rotation engagement body 71a1 of the rotation part 71a enters between the pair of rotation engagement bodies 82a1 of the axle 82a, and the rotation engagement body 71a1 of the rotation part 71a comes into contact with the rotation engagement body 82a1, thereby rotating the front leg 71. The movement is restricted within a predetermined angle.

  A ratchet 71b is fixed to the outer peripheral surface of the rotating portion 71a by welding or the like so as to be integrally rotatable with the rotating portion 71a. The ratchet 71b has a plurality of recesses 71b1 and a push groove 71b2 that engage with a pole 83, which will be described later, and a contact portion 71b3 extends so as to be adjacent to the push groove 71b2. The plurality of recesses 71b1 are formed side by side in the vertical direction of the ratchet 71b (shown in FIG. 2), and the shape of the recesses 71b1 can be moved from the recesses 71b1 with the pole 83 in the lower position to those in the upper position. However, it is formed so as to be a so-called one-way latch in which it is impossible to get over the recess 71b1 at the upper position to the one at the lower position. A pair of guide plates 71c are fixed to the ratchet 71b by welding or the like so as to sandwich the ratchet 71b. The guide plate 71c is for preventing the pole 83 from coming off from the recess 71b1 in the lateral direction. The guide plate 71c has the same outer shape as the push groove 71b2 so as not to prevent the engagement between the ratchet 71b and the trigger lever 84. have.

  Further, the rotating shaft 82b and the engaging protrusion 82c are both erected on the becel 82 so as to extend inward in the lateral direction of the cart 1. A pole 83, a trigger lever 84, and a coil spring 85 are attached to the rotation shaft 82b so as to penetrate therethrough. The pole 83 and the trigger lever 84 are rotatably attached to the turning shaft 82b. The plate-like pole 83 (corresponding to the locking means of the present invention) has a substantially triangular shape, and a claw portion 83a that engages with the concave portion 71b1 of the ratchet 71b described above is formed at one end thereof. An engaging pin 83b to which one end of the coil spring 85 is attached is erected at the end. The other end of the coil spring 85 is fitted into a slit 82d formed on the upper side of the becel 82 and receives a biasing force from the coil spring 85, so that the pole 83 always has a clockwise rotational force in FIG. It has been added.

  On the other hand, a pressing pin 84a is fixed to a substantially central portion of a long trigger lever 84 (corresponding to the trigger means of the present invention) so as to protrude sideways. Further, a spring engaging portion 84b is provided above the pressing pin 84a. The other end portion of the tension spring 86 whose one end portion is engaged with the engaging protrusion 82c of the becel 82 described above is provided therewith. Thus, the pulling force from the tension spring 86 is always applied to the trigger lever 84. However, since both ends of the tension spring 86 and the rotation center of the trigger lever 84 are in a straight line at the initial position shown in FIG. 4, the urging force from the tension spring 86 generates a rotational force to the trigger lever 84. I don't let it.

  Next, based on FIG. 4 thru | or FIG. 16, the effect | action of the interlocking mechanism 8 at the time of loading the cart 1 to the luggage compartment LS of the vehicle AM is demonstrated. When the leg portion 7 is in the standing state, as shown in FIG. 4, the concave portion 71 b 1 at the uppermost position of the ratchet 71 b is engaged with the claw portion 83 a of the pole 83 that receives the urging force from the coil spring 85. The front leg 71 is made unrotatable. When the cart 1 is loaded into the luggage compartment LS of the vehicle AM, as shown in FIG. 13, the handle 52a of the cart 1 is manually pushed to approach the cargo compartment LS from the rear, and the left and right guide rollers 55 of the cart 1 are moved to the cargo compartment. The pair of guide rails 9 fixed to the floor surface of the LS are engaged with each other in the width direction. Each guide rail 9 extends in the front-rear direction of the cargo space LS, and a lower guide surface 91 is integrally formed at each lower end portion so as to face each other. The guide rollers 55 enter the respective guide rails 9 so as to be placed on the lower guide surface 91 while rotating.

  Next, the lower front surface of the trigger lever 84 of each interlocking mechanism 8 is placed on the rear end portion (in one direction) of a pair of brackets 95 (corresponding to a part of the vehicle of the present invention) fixed on the luggage compartment LS. ) Abut (see FIG. 5). As a result, the trigger lever 84 is rotated counterclockwise (rearward) as shown in FIG. 6 against the urging force of the tension spring 86. When the trigger lever 84 is rotated about the rotation shaft 82b, the position of the spring locking portion 84b is displaced, and the engagement protrusion 82c, the spring locking portion 84b, and the rotation shaft 82b are aligned. Therefore, the trigger lever 84 is subjected to a clockwise rotational force in FIG. 6 due to the urging force from the tension spring 86.

  The rear end surface of the trigger lever 84 rotated counterclockwise while resisting the urging force from the tension spring 86 abuts on the engagement pin 83 b of the pole 83, so that the pole 83 is also attached from the coil spring 85. Against the force, it rotates counterclockwise in FIG. As a result, the engagement between the pawl 83a of the pole 83 and the recess 71b1 of the ratchet 71b is released, and the front leg 71 becomes rotatable, and when the cart 1 is pushed into the luggage compartment LS as it is, the front leg 71 is brought into the luggage compartment. It is pressed by the rear end of the LS and starts to rotate counterclockwise (rearward) together with the support link 76 (shown in FIG. 14).

  As shown in FIG. 7, the trigger lever 84 that has been rotated is not further rotated in a state in which the trigger lever 84 is in contact with the upper surface of the bracket 95, and the pole 83 is in contact with the outer peripheral surface of the ratchet 71 b. It will be in the state. When the cart 1 is further pushed into the interior of the cargo compartment LS, the trigger lever 84 completely gets over the bracket 95 and rotates clockwise by receiving the urging force from the tension spring 86 to the initial position. Return (shown in FIG. 8). In this state, the engaging protrusion 82c, the spring locking portion 84b, and the rotating shaft 82b are in a straight line, so that no torque is generated in the trigger lever 84. At this time, since the pole 83 is not restrained by the trigger lever 84, the pole 83 is stationary while being in contact with the contact portion 71b3 of the ratchet 71b by the biasing force from the coil spring 85.

  When the cart 1 is further pushed along the guide rail 9 into the luggage compartment LS, the cart 1 moves further into the cargo compartment LS while the rotation of the front legs 71 and the support links 76 progresses to near horizontal. Enter. At this time, the guide roller 55 of the cart 1 is restrained in the vertical direction between the upper guide surface 92 formed at the upper end portion in front of the guide rail 9 and the lower guide surface 91 described above (see FIG. 15). ).

  As the cart 1 advances to the luggage compartment LS, the pair of engaging portions 56 enter the slits 93 provided at the rear end portions of the guide rails 9 and protrude outward in the left-right direction of the guide rails 9. It becomes. At the rear end of each guide rail 9, an engagement piece 94 is rotatably attached to the outside of each slit 93, and an elastic member (vine) is provided between the engagement piece 94 and the guide rail 9. The engagement piece 94 always receives a clockwise urging force in FIG. 15 by interposing the spring spring 94a.

  As shown in FIG. 15, when the engaging portion 56 of the cart 1 enters the guide rail 9, it abuts against the engaging piece 94 to counterclockwise counteract the urging force of the elastic member 94 a. Rotate. Thereafter, when the cart 1 further advances into the cargo space LS, the engaging piece 94 gets over the engaging portion 56 and then rotates clockwise in FIG. 15 by the urging force of the elastic member 94a. The notch 94b is fitted to the engaging portion 56 (shown in FIG. 16). Thereby, the cart 1 is fixed in the front-rear direction, and loading into the vehicle AM is completed. At this time, the front leg 71 is in a retractable retractable state.

  When the cart 1 is lowered from the vehicle AM, the engagement piece 94 of the guide rail 9 is manually rotated counterclockwise from the state shown in FIG. 16 to release the engagement with the engagement portion 56. Meanwhile, the cart 1 is pulled out along the guide rails 9 to the rear of the luggage compartment LS. As the cart 1 is pulled out of the cargo space LS, the front leg 71 starts to rotate clockwise (forward) in FIG. 15 together with the support link 76 due to its own weight.

  When the cart 1 is pulled out from the cargo compartment LS by a predetermined amount, the lower rear surface of the trigger lever 84 is placed at the front end of the bracket 95 (loading) as shown in FIG. Abut in the opposite direction). When the cart 1 is further pulled out from the luggage compartment LS, the trigger lever 84 is pressed from the bracket 95 as shown in FIG. 10 and starts to rotate clockwise (forward). As the trigger lever 84 rotates, the positions of the engagement protrusion 82c, the spring locking portion 84b, and the rotation shaft 82b are not aligned again. A counterclockwise rotational force is generated at. Further, when the ratchet 71b rotates forward together with the front leg 71, the concave portion 71b1 at the lowest position of the ratchet 71b starts to engage with the pole 83 that has been in contact with the contact portion 71b3 of the ratchet 71b. As a result, the front leg 71 becomes unrotatable toward the retracted state again.

  When the cart 1 is further pulled out from the cargo compartment LS, the trigger lever 84 is further rotated against the urging force from the tension spring 86 by the front end portion of the bracket 95, and the pressing pin 84a pushes the ratchet 71b. It fits into the groove 71b2 and presses the front leg 71 to forcibly rotate forward (shown in FIGS. 11 and 17). Further, since the ratchet 71b also rotates clockwise in FIG. 11 by the forward rotation of the front leg 71, the pawl portion 83a of the pole 83 gets over from the recessed portion 71b1 positioned below to the one positioned above. To go. When the cart 1 is completely pulled out from the cargo compartment LS, the engagement between the trigger lever 84 and the bracket 95 is released, and the trigger lever 84 receives the biasing force from the tension spring 86 and returns to the initial position (shown in FIG. 12). ). At this time, the rotation of the front leg 71 is sufficiently advanced so that the casters 75 of the front leg 71 and the rear leg 73 are landed, and the claw portion 83a of the pole 83 is engaged with the concave portion 71b1 at the uppermost position, so that it stands up again. (Shown in FIG. 13).

  According to this embodiment, the interlocking mechanism 8 engages with the front leg 71 to hold the front leg 71 in an upright state, and when being stored in the vehicle AM, the engagement with the front leg 71 is released and the vehicle When the vehicle is pulled out from the vehicle, the front leg 71 is pressed to change into a standing state. Therefore, the leg 7 can be stored only by being pushed into the vehicle AM, and the vehicle AM can be stored even if the luggage compartment LS is not sufficiently high. It is possible to change the leg portion 7 to the standing state simply by pulling it out from the position.

  The interlocking mechanism 8 is engaged with a trigger lever 84 that abuts on a rear end portion of the bracket 95 fixed to the vehicle AM and rotates rearward, and a ratchet 71b attached to the front leg 71, so that the leg portion 7 stands up. And has a pole 83 that is rotated by coming into contact with the trigger lever 84 that is rotated rearward to be disengaged from the ratchet 71b, and is pulled out of the vehicle AM. When the trigger lever 84 is in contact with the front end surface of the bracket 95 and is rotated forward, the trigger lever 84 is configured to press and move the front leg 71 into a standing state. In conjunction with the loading / unloading of the vehicle AM, the leg portion 7 can be reliably changed between the standing state and the retracted state.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention. Various modifications can be made without departing from the scope of the invention.
(1) One interlocking mechanism may be provided on either the left or right side of the cart.
(2) The present invention can also be applied to a handcart other than a cart such as a stroller or an ambulance stretcher.
(3) Instead of contacting the trigger lever with the bracket of the vehicle, the trigger lever may be brought into contact with another part of the vehicle and rotated.

It is a perspective view showing the state before loading the cart by this embodiment in the luggage compartment of a vehicle. It is a disassembled perspective view of an interlocking mechanism. It is a perspective view after the assembly of the interlocking mechanism shown in FIG. It is the side view of the interlocking mechanism which showed the place brought close to the rear end of a vehicle in order to load a cart into a luggage compartment. It is the side view which showed the place which the trigger lever contact | abutted to the rear-end part of the bracket when loading a cart into a luggage compartment. It is the side view which showed the place where engagement with the ratchet and the pole was cancelled | released. It is the side view which showed the place where the rotation of the front leg advanced and the pole contact | abutted on the outer peripheral surface of the ratchet. It is the side view which showed the place where the trigger lever got over the bracket. It is the side view of the interlocking mechanism which showed the place where the trigger lever contact | abutted with the front-end part of a bracket, when pulling out a cart from a luggage compartment. It is the side view which showed the place which the pole began to engage with the recessed part of a ratchet by rotation to the front of a front leg. It is the side view which showed the place where the front leg was pressed by the trigger lever. It is the side view which showed the place where the cart was further pulled out from the cargo compartment, the engagement with the bracket of the trigger lever was released, and returned to the initial position. It is a side view showing the place which mounted the guide roller of the cart on the guide rail of a vehicle. It is a side view showing the place which pushed the cart into the luggage compartment and started to fold the legs. It is a side view showing the place which put the cart into the luggage compartment of a vehicle with the leg part stored. It is a side view showing the place which locked the engaging piece of the vehicle to the engaging part of the cart, and fixed the cart to the luggage compartment of the vehicle. It is a side view showing the place where the cart was pulled out from the luggage compartment and the leg part is rotating forward.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Cart 5 ... Loading part 7 ... Leg part 8 ... Interlocking mechanism 71b ... Ratchet 75 ... Caster 83 ... Pole 84 ... Trigger lever 95 ... Bracket AM ... Vehicle

Claims (2)

It is provided with a loading part for placing a load, and a leg part having a wheel at the lower end part and supporting the above mentioned coin part from below, and a standing state in which the leg part can run and a vertical direction by being folded. In the leg retractable wheelbarrow that can be mounted on the vehicle by switching to the retracted state with reduced size,
When engaging with the leg portion to hold the leg portion in the standing state and stored in the vehicle, the engagement with the leg portion is released and when the leg portion is pulled out from the vehicle, A leg retractable handcart comprising an interlocking mechanism for pressing the leg to change to the standing state. The interlocking mechanism includes a part of the vehicle, trigger means that abuts in one direction and rotates to one side, and engages with the leg portion to hold the leg portion in the upright state. A locking means that is rotated by contacting the trigger means rotated to the one side and is disengaged from the leg portion when stored in
When the vehicle is pulled out from the vehicle, the trigger means abuts against a part of the vehicle in the opposite direction and rotates to the other side, thereby pressing the leg portion to change to the standing state. The leg-retractable handcart according to claim 1.

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