JP5738960B2 - Carry cart - Google Patents

Description

  The present invention relates to a carry cart capable of expanding a floor area on which a load is placed.

  Conventionally, a folding cart as described in Patent Document 1 is known. This foldable cart has a configuration in which a folding plate is provided on the front surface of a box-shaped main body so as to open with the bottom side as a rotation axis, and a stretchable support is passed between the front end of the folding plate and the main body. A caster is provided on the front surface of the front end of the folding plate. This foldable cart places a load carefully on the floor with the folding plate open and pushes the handle to carry it.

Japanese translation of PCT publication No. 2002-071886

  However, the conventional folding cart has a problem that the folding plate has a low rigidity and cannot load a heavy load. In addition, there is a problem that it is difficult to load a load because the front end of the folding plate is supported by the support. The present invention has been made to solve such problems.

The carry cart according to the present invention is a flat box shape having a handle erected in the vicinity of the rear end edge, the base having an open front end edge and having a guide structure therein, and the open front end of the base A flat box-shaped slide base that can be inserted while being guided by the guide means from the edge to the inside of the base, and is provided between the base and the slide base, and is fixed at a predetermined drawing position. And a positioning mechanism.

  In the carry cart according to the present invention, the positioning bar is provided in the same direction as the guide direction by the guide means, and the guide bar 9 has a circumferential groove at a predetermined position. A fixed shaft that is biased by a spring and can be fitted into the groove, and a holding structure that holds the fixed shaft in a state where the fixed shaft is fitted in the groove of the guide bar 9 and a state in which the fixed shaft is removed. The structure is provided between the base and the slide base.

  Further, in the carry cart according to the present invention, in the above invention, the base and the slide base are each provided with a caster, or the base is provided with a caster, and a handle is provided with a button. A transmission mechanism for transmitting the movement of the caster to the lock portion of the caster is provided, and a part of this transmission mechanism includes an expansion / contraction rod that expands and contracts in the moving direction of the slide base, and the expansion / contraction rod can be fixed in a predetermined expansion / contraction state. It has a positioning fixing means.

In the carry cart according to the present invention, in the above invention, the handle is formed with a recess, the button is stored in the recess, and the handle is provided with a cover that can cover the recess that slides in the longitudinal direction. It is characterized by being.

It is an assembly drawing which shows the carry cart which concerns on Embodiment 1 of this invention. It is a back surface perspective view of the carry cart shown in FIG. FIG. 3 is a partially enlarged view of FIG. 2. It is explanatory drawing which shows the structure of a positioning mechanism. It is explanatory drawing which shows the structure of a positioning mechanism. It is a back surface perspective view which shows the carry cart of a reduction state. It is explanatory drawing which shows the stopper mechanism of a caster. It is explanatory drawing which shows the upper surface of a handle. It is explanatory drawing which shows the front of a carry bar. It is a bottom view which shows the state which accommodated the slide base and the state pulled out. It is a top view which shows the state which accommodated and pulled out the slide base. It is a structural diagram which shows the carry cart based on Embodiment 2 of this invention. It is a perspective view which shows the state which mounted | wore the cover of the positioning mechanism of the carry cart of FIG. It is a block diagram which shows the stopper mechanism of the carry cart shown in FIG. FIG. 15 is a partially enlarged view of the stopper mechanism of FIG. 14. FIG. 15 is a partially enlarged view of the stopper mechanism of FIG. 14.

(Embodiment 1)
1 is an assembly view showing a carry cart according to Embodiment 1 of the present invention. FIG. 2 is a rear perspective view of the carry cart shown in FIG. FIG. 3 is a partially enlarged view of FIG. 4 and 5 are explanatory views showing the configuration of the positioning mechanism. FIG. 6 is a rear perspective view showing the carry cart in a contracted state (a state before expansion). The carry cart 100 includes a base 1 that forms a floor surface on which a load is placed and a slide base 2 that is formed by expanding the floor surface on which the load is placed. In the vicinity of the rear edge of the base 1, an extendable carry bar 3 is erected. The base 1 has a relatively flat box shape, side walls are provided on the side and back end edges, and the front end edges are open. The slide base 2 can be inserted into the opened front end edge. Two ribs 4 constituting guide means are provided in parallel on the inside of the side wall of the base 1. The rib 4 is provided linearly from the front side edge to the vicinity of the back edge. Further, a plate-like stopper plate 5 is provided in the base 1 and in the vicinity of the inner edge thereof.

  The slide base 2 has a relatively flat box shape similar to the base 1, and the side surface thereof has, as guide means, a groove 6 corresponding to the upper rib 4 and a step corresponding to the lower rib 4. Part 7 is provided. The upper surface portion of the slide base 2 is substantially flush with the upper surface portion of the base 1 when pulled out from the base 1. On the back side of the slide base 2, a plurality of reinforcing ribs 8 are formed in a lattice shape. In the example shown in the figure, the slide base 2 has a length of about two-thirds of the base 1 in the depth direction.

  Three guide bars 9 for positioning from the stopper plate 5 of the base 1 are provided. One guide bar 9 is provided at the center, and two are provided at the left and right in the vicinity of the side walls. The arrangement direction of the guide bar 9 is the same as the expansion / contraction direction of the slide base 2. The guide bar 9 is made of stainless steel or aluminum and includes a circumferential groove 10 at a predetermined position. One end of the guide bar 9 penetrates the stopper plate 5 and is inserted to the back side of the base 1 to be firmly fixed. The slide base 2 is provided with three insertion portions 11 into which the guide bar 9 is inserted. The insertion portion 11 has a tunnel shape, and a positioning mechanism 12 is provided near the entrance of the guide bar 9 of the insertion portion 11.

The positioning mechanism 12 includes a fixed shaft 13 that can move up and down in a direction perpendicular to the axial direction of the guide bar 9, a lever 14 provided at an end of the fixed shaft 13, and the fixed shaft 13 on the surface of the guide bar 9. The coil spring 15 is biased against the shaft 15 and the shaft hole 16 that holds the fixed shaft 13 is configured. A groove 17 into which the lever 14 is fitted is formed on the top surface of the shaft hole portion 16. Further, a shallow concave portion 18 is formed on the top surface at a different angle from the groove 17. The lever 14 of the fixed shaft 13 can be fitted into the groove 10 of the guide bar 9. In a state where the lever 14 is fitted in the groove 17, the lever 14 falls into the groove 10 of the guide bar 9 and the lever 14 is restricted so that it cannot rotate. Further, in a state where the lever 14 is locked to the recess 18, the fixed shaft 13 is detached from the groove 10 of the guide bar 9. In other words, the lever 14, the groove 17 of the shaft hole portion 16, the recess 18, and the like constitute a holding structure that holds the fixed shaft 13 in a state where it is fitted in and removed from the groove 10 of the guide bar 9.

  Two casters 20 are provided on both sides of the bottom surface of the base 1. Also, two casters 20 are provided on both sides of the bottom surface on the front side of the slide base 2. That is, the casters 20 provided on the base 1 and the slide base 2 are provided at the four corners as a whole.

  FIG. 7 is an explanatory view showing a stopper mechanism of a caster. As shown in FIGS. 6 and 7, a stopper mechanism 21 is provided on the back surface of the base 1 and the slide base 2. The stopper mechanism 21 includes a lock portion 22 that prevents the caster 20 from rotating, a push button 24 provided on a handle 23 of the carry bar 3, and a mechanically configured transmission between the lock portion 22 and the push button 24. Mechanism 25.

The transmission mechanism 25 includes a rod 31 inserted into the carry bar 3, an arm 32 that is rotatably locked to the tip of the rod 31, a first rotary shaft 33 to which an end of the arm 32 is fixed, A second arm 34 provided on the first rotating shaft 33; a telescopic rod 35 rotatably provided at the tip of the second arm 34; a third arm 36 rotatably provided at the end of the telescopic rod 35; The second rotation shaft 37 to which the end portion of the arm 36 is fixed, and the locking portion 38 for stopping the rotation of the caster 20 provided at the tip of the second rotation shaft 37 are provided. The locking portion 38 has a structure that restricts the rotation of the caster 20 by urging the locking bar 39 to the caster 20. The locking bar 39 moves up and down with respect to the caster 20 by a rotating arm provided on the second rotating shaft 37. The first rotating shaft 33 is also provided with the same locking portion 38 as described above for stopping the rotation of the caster 20.

  The telescopic rod 35 has a structure divided into two parts, and has a positioning and fixing means 40 in which the rods 35a and 35b overlap each other in the longitudinal direction and are slidable with each other and can be fixed at a predetermined position. The positioning and fixing means 40 is configured such that a fixing screw is provided on a part of one rod, and this fixing screw is screwed into a screw hole provided on the other rod. The screw holes are provided corresponding to the intervals of the grooves 10 provided in the guide bar 9.

Note that the positioning and fixing means 40 is not limited to the configuration shown in the figure as long as the telescopic rod 35 can be fixed at a predetermined telescopic position corresponding to the positioning position of the positioning mechanism 12, and other known configurations can be adopted. For example, although not shown, one rod can be pushed into the inside from the surface and provided with a spherical projection at the tip, and the other rod can be inserted in the axial direction and the projection can enter the other rod. The hole may be provided at a position corresponding to the groove 10 of the guide bar 9. In this case, the protrusion enters the hole together with the positioning by the guide bar 9, and the telescopic rod 35 itself is also positioned and fixed, so that the force can be transmitted. When the position by the positioning mechanism 12 is changed, the protrusion is pushed in to disengage from the hole. If it does so, the said protrusion will fit in the hole adjacent to the said hole, and it will be positioned and fixed again.

  The other end of the rod 31 is connected to both sides of a plate 41 provided inside the handle 23 of the carry bar 3. The plate 41 is connected to the push button 24 provided at the upper part of the handle 23 at the center thereof.

  The rod 31 and the telescopic rod 35 can be replaced by a wire. In this case, a mechanism such as a spring is used together to return the wire pulling operation (not shown). In short, it is sufficient that the operation of the push button 24 can be transmitted to the locking portion 38.

  FIG. 8 is an explanatory view showing the upper surface of the handle. A recess 51 is formed on the upper surface of the handle 23, and the push button 24 is provided in the recess 51. The handle 23 is provided with a cover 52 that can slide in the longitudinal direction. The recess 51 is covered by the cover 52 when the push button 24 is not used. When the push button 24 is used, the cover 52 is slid to expose the push button 24.

  FIG. 9 is an explanatory view showing the front of the carry bar. A hook 55 is provided on a part of the carry bar 3. The hook 55 faces upward and is provided on the side of the carry bar 3. The hook 55 is attached with a convenience store bag, an umbrella, a pouch or other string for fixing the load.

  Next, the operation of the carry cart 100 will be described. FIG. 10 is a bottom view showing a state in which the slide base is housed and a state in which the slide base is withdrawn. FIG. 11 is a top view illustrating a state in which the slide base is housed and a state in which the slide base is withdrawn. In this carry cart 100, the position of the slide base 2 is fixed to the base 1 by the positioning mechanism 12. FIG. 10A and FIG. 11A show a state where the slide base 2 is housed in the base 1. The positioning mechanism 12 fixes the slide base 2 so as not to move in a state where the slide base 2 is housed in the base 1 by fitting the tip of the fixed shaft 13 into the groove 10 of the guide bar 9.

FIG. 10B and FIG. 11B show a state in which the slide base 2 is pulled out from the base 1. When extending the slide base 2 with respect to the base 1, the lever 14 of the positioning mechanism 12 is pulled out of the groove 17 of the shaft hole portion 16 and rotated, and temporarily locked in the shallow concave portion 18 on the top surface. Thereby, the slide base 2 becomes movable with respect to the base 1, and the slide base 2 can be pulled out from the base 1. Then, the lever 14 is rotated from the concave portion 18 of the shaft hole portion 16 and is put into the groove 17 again. In this state, the tip of the fixed shaft 13 is in a sliding state in contact with the surface of the guide bar 9. Subsequently, when the slide base 2 is pulled out by a predetermined distance, the tip of the fixed shaft 13 falls into the groove 10 adjacent to the groove 10 of the guide bar 9 by the action of the coil spring 15, and the movement of the slide base 2 is restricted. . In this state, the position of the slide base 2 is fixed again with respect to the base 1.

Further, when it is desired to pull out the slide base 2 from the base 1, the lever 14 is pulled out of the groove 17 to release the locking between the fixed shaft 13 and the guide bar 9, and the slide base 2 is made movable, as described above. The slide base 2 is moved until the fixed shaft 13 falls into the adjacent groove 10 and fixed at that position. If the lever 14 remains temporarily locked in the recess 18 of the shaft hole portion 16, the slide base 2 can be pulled out from the base 1 at a stretch. In addition, since the restriction protrusion is provided at the end portion of the guide bar 9, the maximum pull-out amount of the slide base 2 is restricted, and the guide bar 9 is not completely pulled out from the base 1.

Since the two casters 20 are provided on the slide base 2, a total of four casters 20 including the two casters 20 of the base 1 are arranged in a balanced manner at the four corners of the base 1 and the slide base 2. Thereby, the attitude | position of the carry cart 100 is stabilized. In this way, the base 1 can be expanded to increase the floor area. Further, since the slide base 2 is guided with respect to the base 1 by the guide means constituted by the rib 4, the groove 6 and the step portion 7, the overall rigidity is high and a heavy load can be placed on the floor surface. Further, since the floor surfaces of the base 1 and the slide base 2 are substantially flush, it is easy to place a load.

  On the other hand, when the expanded slide base 2 is stored in the base 1, the fixing by the positioning mechanism 12 is released in the same manner as described above, the movable slide base 2 is put into the base 1 and fixed by the positioning mechanism 12. . Note that the slide base 2 can be housed in the base 1 at a time as long as the lever 14 remains temporarily locked in the recess 18 of the shaft hole portion 16.

  Next, the stopper operation of the caster 20 will be described. First, the push button 24 is exposed by sliding the cover of the handle 23. When the push button 24 is pressed, the rod 31 pushes the arm 32 through the plate 41, and the arm 32 rotates the first rotation shaft 33. This rotation is transmitted to the telescopic rod 35 via the second arm 34, and the movement of the telescopic rod 35 is transmitted to the second rotating shaft 37 by the third arm 36. The second rotary shaft 37 regulates the movement of the caster 20 by rotating the locking portion 38 at the tip. Further, the first rotation shaft 33 rotates the locking portion 38 at the tip to restrict the movement of the caster 20. The state where the push button 24 is pressed is temporarily held. When the push button 24 is pressed again, the restriction of the caster 20 is released by the reverse movement to the above.

  The telescopic rod 35 extends in accordance with the expansion and contraction of the slide base 2. When moving the slide base 2, the fixing screw is loosened and the fixing screw is removed from the screw hole. In this state, the slide base 2 is moved and fixed by the positioning mechanism 12. Since the interval between the grooves 6 of the guide bar 9 and the interval between the screw holes are the same, when the guide bar 9 is positioned, the fixing screw is aligned with one of the screw holes. In this state, the fixing screw is screwed into the screw hole to fix the telescopic rod 35. As a result, the telescopic rod 35 can expand and contract and transmit force, so that even if the slide base 2 is configured to expand and contract, all the four-wheel casters 20 can be locked.

  As mentioned above, according to the carry cart 100 of this invention, a floor area can be expanded as needed in a state with high rigidity. Moreover, even if the base 1 is expanded, all four wheels can be locked. In addition, it is possible to prevent the push button 24 from being pushed by the cover of the handle 23.

(Embodiment 2)
FIG. 12 is a structural diagram showing a carry cart according to Embodiment 2 of the present invention. FIG. 13 is a perspective view showing a state where a cover of the positioning mechanism of the carry cart of FIG. 12 is attached. The carry cart 200 has a first feature in that the carry cart positioning mechanism of the first embodiment has a different structure. In addition, the caster stopper mechanism has a second feature in that it has a structure that functions only on the base 1 side.

The positioning mechanism 250 includes a plate 201 arranged in a direction perpendicular to the guide bar 9 and a push rod 204 that moves the plate 201 in the longitudinal direction.

  The plate 201 is provided with a notch 202 in accordance with the position of the guide bar 9. The notch 202 fits into the groove 10 of the guide bar 9. A coil spring 209 is disposed at one end of the plate 201 and is urged by the coil spring 209 so that the notch 202 is fitted in the groove 10 at a normal position. Further, the plate 201 is provided with a recess 203 for moving the plate 201 in the longitudinal direction. The plate 201 may be a rod having a circular or quadrangular cross section (not shown) as long as the notch 202 and the recess 203 that fit into the groove 10 are provided.

  The push rod 204 has a head portion 205 provided at one end and provided so that the inclined surface at the tip thereof is in contact with one side of the concave portion 203 of the plate 201, and a button 206 provided at the opposite end portion. A coil spring 210 is coaxially arranged on the head portion 205 and biases the push rod 204 in a direction away from the plate 201. The push rod 204 is movably provided in a first insertion portion 207 provided on the slide base 2. The plate 201 is movably installed in a second insertion part 208 provided in the slide base 2 in a direction orthogonal to the first insertion part 207. The button 206 is disposed in front of the slide base 2 and can be pressed from the outside.

  Next, the operation of the positioning mechanism 250 will be described. When the slide base 2 is extended with respect to the base 1, when the button 206 is pressed, the push rod 204 transmits the slide to the head portion 205, and the inclined surface at the tip of the head portion 205 comes into contact with one side of the recess 203. The plate 201 is moved in a direction orthogonal to the push rod 204 while one side is in contact with the inclined surface.

  When the plate 201 moves, the engagement between the notch 202 and the groove 10 is released, and the guide bar 9 can freely move relative to the plate 201. In this state, the slide base 2 can be pulled out from the base 1. When the button 206 is released, the force to move the plate 201 by the head portion 205 is lost, so that the notch portion 202 of the plate 201 is pressed against the surface of the guide bar 9 by the action of the coil spring 209. In this state, since the notch 202 only slides on the surface of the guide bar 9, there is no hindrance to the movement of the slide base 2.

  When the slide base 2 is pulled out as it is, the notch 202 of the plate 201 is fitted into the adjacent groove 10 by the action of the coil spring 209. As a result, the movement of the guide bar 9 relative to the plate 201 is restricted, and the slide base 2 can no longer be pulled out. Further, in order to pull out the slide base 2, the button 206 is pressed to release the engagement between the guide bar 9 and the plate 201, the slide base 2 is pulled out, and the notch 202 and the groove 10 are again drawn. Secure by engagement. Similarly, when the slide base 2 is pushed into the base 1, the button 206 is operated.

  By releasing the engagement between the base 1 and the slide base 2 by the push operation of the button 206 as described above, the base 1 can be expanded by a simple operation. Further, since the button 206 is disposed in front of the slide base 2, it is easy to operate with the carry cart 200 placed on the floor surface. In addition, since only the caster of the base 1 can be fixed, the caster of the base 1 is fixed, and the caster of the slide base 2 is moved, so that the caster of the base 1 is fixed and the slide base 2 is fixed to the floor. It can be placed on the surface and pulled out.

  FIG. 14 is a block diagram showing a stopper mechanism of the carry cart shown in FIG. 15 and 16 are partially enlarged views of the stopper mechanism of FIG. The stopper mechanism 260 includes a lock portion 262 that prevents the caster 261 from rotating, a push button 24 provided on the handle 23 of the carry bar 3, and a transmission mechanism that is mechanically configured between the lock portion 262 and the push button 24. 263.

The transmission mechanism 263 includes a rod 264 inserted through the carry bar 3, an arm 265 that is rotatably locked to the tip of the rod 264, and a rotating shaft 266 that rotatably supports the center of the arm 265. Is done. The lock portion 262 includes a hook 267 that is rotatably locked to the other end of the arm 265 and a plurality of lock holes 268 provided in an annular shape on the caster 261. As shown in FIG. 16, the hook 267 includes a shaft portion 270 that is rotatably connected to the other end of the arm 265, and a U-shaped member that is provided at the lower end of the shaft portion 270 and has a protrusion 269 formed inside. 271. The member 271 rotates around the shaft of the shaft portion 270 and follows the turning motion when the caster 261 moves in the direction.

  The stopper operation of the caster 261 will be described. First, the push button 24 is exposed by sliding the cover of the handle 23. When the push button 24 is pressed, the rod 264 pushes down one end of the arm 265 through the plate 41, the arm 265 rotates around the rotation shaft 266, the other end of the arm 265 goes up, and the hook 267 is lifted. The protrusion of the hook 267 is fitted into the lock hole 268 of the caster 261, and the caster 261 is thereby restricted from rotating. The state where the push button 24 is pressed is temporarily held. When the push button 24 is pushed again while holding the handle 23, the pop-up function works and the restriction of the caster 261 is released by the reverse movement to the above. If only the caster 261 of the base 1 is locked, the structure is simplified as a whole, and the caster of the slide base 2 is not locked when the slide base 2 is expanded, so that the slide base 2 can be easily expanded. .

100 Carry Cart 1 Base 2 Slide Base 3 Carry Bar 4 Rib 5 Stopper Plate 6 Groove 7 Step 9 Guide Bar 10 Groove 12 Positioning Mechanism 13 Fixed Shaft 14 Lever 16 Shaft Hole 17 Groove 18 Recess 20 Caster 21 Stopper Mechanism 22 Locking Section 23 Handle 24 Push button 25 Transmission mechanism

Claims (3)

A flat box shape with a handle erected in the vicinity of the back end edge, the front end edge being open and having a guide structure inside;
A flat box-shaped slide base that is inserted into the base while being guided by the guide means from the open front edge of the base, and
A positioning mechanism that is provided between the base and the slide base and fixes the slide base at a predetermined drawing position;
With
Casters are provided on the base and the slide base,
The handle has a button,
A transmission mechanism that transmits the movement of this button to the lock part of the caster is provided, and a part of this transmission mechanism includes an expansion / contraction rod that expands and contracts in the moving direction of the slide base,
The carry cart has a positioning and fixing means that can be fixed in a predetermined extended state. A flat box shape with a handle erected in the vicinity of the back end edge, the front end edge being open and having a guide structure inside;
A flat box-shaped slide base that is inserted into the base while being guided by the guide means from the open front edge of the base, and
A positioning mechanism that is provided between the base and the slide base and fixes the slide base at a predetermined drawing position;
With
A caster is provided on the base,
The handle has a button,
A transmission mechanism that transmits the movement of this button to the lock part of the caster is provided, and a part of this transmission mechanism includes an expansion / contraction rod that expands and contracts in the moving direction of the slide base,
The carry cart has a positioning and fixing means that can be fixed in a predetermined extended state. 3. The handle according to claim 1, wherein the handle is formed with a recess and the button is accommodated in the recess, and the handle is provided with a cover that can cover the recess that slides in the longitudinal direction. Carry cart described.

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