JP2540288Y2 - Hand truck - Google Patents

Description

[Detailed description of the invention]

[0001]

[Industrial application field] This invention is particularly applicable to uneven terrain with many irregularities such as a deck plate temporarily installed at a construction site.
Suitable for transporting various materials and tools such as cement, sand, tiles, stepladders, scaffolding boards, pipes, ropes, hoses and reinforcing bars, and can be folded and loaded on construction elevators as necessary. It relates to a simple hand truck.

[0002]

2. Description of the Related Art Unicycles are frequently used as hand trucks for transporting various materials on irregular terrain such as construction sites. However, such unicycles can be used easily and can be easily turned. It was stable and could not load long objects such as reinforcing bars, temporary pipes and formwork. Therefore, conventionally, the above-mentioned long object has been transported by the worker over the shoulder or lowered to the hand. There is also known a basket-type transport vehicle in which a free wheel having a diameter of about 200 mm is attached to the four lower corners of a basket-shaped packing box having a rectangular parallelepiped (length 1.2 m, width 1 m, height 0.9 m). Since the basket-shaped transport vehicle had all wheels of small diameter, when used on the above deck plate, the width of the deck plate was 180 mm,
As a result, the free wheel fell into a groove having a depth of 75 mm, so that it could hardly be used. Further, since the length of the basket-shaped transport vehicle is about 1.2 m, the above-mentioned long object could not be transported.

[0003]

[Problem to be solved by this invention] This invention is intended to use not only short objects such as cement, sand, rounded ropes and hoses but also long objects such as reinforcing bars and mesh bars as necessary An object of the present invention is to provide a push cart that can be transported and that can be folded into a compact shape when put on an elevator or the like.

[0004]

The hand truck according to the present invention comprises a small-sized rear free wheel 17 having a rectangular parallelepiped packing box 10 attached to the center of the bottom of the rear of the packing box, and the packing box 10 having a small diameter. A horizontal frame that is supported by large-diameter front wheels 16 attached to the front left and right of the carton and connects the left and right upper edge frames of the packing box 10.
11b is formed in a U-shape or a V-shape, and a pair of left and right front levers 14b is swingable back and forth on the front edge of the upper edge of the packing box 10 , and when the front lever 14b is tilted backward, the front end is turned.
Connected so as not to protrude after the packing box, the lateral stays 1 prospective position of the front lever the tips of the left and right front lever 14b connected by transverse stays 14c of U-shaped or V-shaped
4c is formed with a front receiving member 14 having a concave upper surface , and a pair of left and right rear levers 15b are connected to the rear end of the upper edge of the packing box 10 so as to be swingable back and forth. or rear are connected by horizontal stays 15c of the V-shaped
At the rearward position of the lever, a rear receiving member 15 is formed in which the upper surface of the lateral stay 15c is recessed , and the front receiving member 14 and the rear receiving member 15 are supported at both the frontward position and the rearward position, respectively. Locking means is provided for this purpose.

The packing box 10 has a rectangular parallelepiped frame 11 formed by connecting a number of pipes, a rectangular thin plate-shaped bottom plate 12 fitted into the inner bottom thereof, and an upper portion of the plate-shaped bottom plate. And a wire mesh side wall 13 stretched over the wire. In addition, the size of the packing box is 2 m or less in length and 0.75 m in width in consideration of loading in an elevator.
Hereinafter, it is preferable to design the height from the ground to 1 m or less. And the diameter 17 of the rear adjustable wheel is 200
~ 300mm, and the diameter of the front wheel 16 is 600 ~ 800
mm is respectively preferable.

Further, a pair of left and right front auxiliary wheels 30 having a small diameter are provided so as to be able to ascend and descend so as to be slightly in contact with the ground point of the left and right front wheels, and a middle and rear free wheel between the left and right front auxiliary wheels 30. It is preferable that a small-diameter rear auxiliary wheel 37 is provided at an intermediate position between the front auxiliary wheel 17 and the rear auxiliary wheel 37 so as to float about 10 to 20 mm from a plane where the front wheel and the rear free wheel come into contact.

[0007]

[Function] The hand truck of the present invention has a front support 1
4 and the rear receiving member 15 is tilted to the rearward position, and the upper edge of the packing box 10 is extended forward and backward according to the length of the front and rear receiving members. Since the U-shaped or V-shaped horizontal stays 14c and 15c are provided at the tip of the receiving member, a long object such as a reinforcing bar can be put between the U-shaped or V-shaped recesses of the front and rear horizontal stays. In addition, a short object such as cement or a rolled rope can be stacked in the packing box. Further, the front receptacle 14 rearwardly located opposite, also when engaging defeat each rear receptacle 15 in forward position, crates 10, before
Part receptacle 14 becomes compact shape has a projecting after packing box, can be transported gained above short product in packing boxes, also when empty, the packing boxes 10 beneath the rear end It can be stood up and housed in an elevator or warehouse.

In the transporter of the present invention, the packing box 10 is supported by a pair of large front wheels 16 attached to the front left and right sides of the packing box 10 and a small-diameter rear free wheel 17 attached to the bottom center of the rear bottom of the packing box. The diameter of the front wheel is large, so it is easy to climb over steps, running resistance is small, and even on a rough terrain such as a deck plate at a construction site, even if the rear adjustable wheel may fall into the groove, only the front wheel Hardly falls, and any material or tool can be transported smoothly. Especially, the diameter of the rear freewheel is 200mm
As described above, when the diameter of the front wheels is set to 600 mm or more, falling into the grooves is further reduced, and it is easier to get over a step. However, if the diameter of the rear free wheel exceeds 300 mm or the diameter of the front wheel exceeds 800 mm, the height of the packing box is undesirably increased.

When the packing box 10 is formed of a pipe frame 11, a thin plate-shaped bottom plate 12, and a wire mesh side wall 13, when the packing box is filled with small items such as bolts and nuts. No spilling and weight reduction is possible. Also,
Behind the left and right front wheels 16, a pair of left and right small-diameter front auxiliary wheels 3
When 0 is provided so as to be able to move up and down, at least one of the front wheel and the front auxiliary wheel is set by setting the distance between the contact point of the front auxiliary wheel and the front wheel to the distance between the peak and the valley of the deck plate. The traveling of the transport vehicle can be further smoothed by always contacting the hill of the deck plate. When the rear auxiliary wheel 37 is provided in front of the rear adjustable wheel 17,
By setting the distance between the rear adjustable wheel and the rear auxiliary wheel to be the distance between the peak and the valley of the deck plate, at least one of the rear adjustable wheel and the rear auxiliary wheel is always in contact with the peak of the deck plate, and The traveling can be further smoothed. However, if the floating amount of the rear auxiliary wheel with respect to the plane where the front wheel and the rear adjustable wheel are in contact is less than 10 mm, the rear auxiliary wheel is always in contact with the ground, so running on a flat surface is not smooth, and if the floating amount exceeds 20 mm. However, the function of the rear auxiliary wheel on uneven terrain will not be exhibited.

[0010]

FIG. 3, FIG. 4 and FIG.
Is a rectangular parallelepiped frame 11 formed by connecting a number of pipes.
A rectangular thin plate-shaped bottom plate 12 fitted into the inner bottom portion thereof, and a wire mesh side wall 13 stretched over an upper portion of the dish-shaped bottom plate 12.
The upper edge frames 11a, 11a located at the upper edge of the
The rear end and the middle three places are connected by a horizontal frame 11b bent in a V-shape, respectively (see FIGS. 7 and 8). Also,
The vertical front frame 11 located at the front end of the left and right side walls 13
c, 11c and a vertical rear frame 11 located at the rear end
5d and 11d (see FIGS. 5 and 8), portions having the same height as the bottom of the V-shaped bent horizontal frame 11b are connected by a linear horizontal frame 11e. The V-shaped bent horizontal frame 11b located at the front end (see FIG. 8) has left and right ends projecting sideways along the lower surface of the upper edge frame 11a.

A pair of left and right front levers 14b, 1a having a fulcrum 14a at a position forward of the connecting portion of the intermediate horizontal frame 11b are provided inside the front portions of the left and right upper edge frames 11a, 11a.
A horizontal stay 14c is swingably attached, and a lateral stay 14c (FIG. 3) is bent between its ends in the same V-shape as the horizontal frame 11b.
Are connected to form the front receiver 14. on the other hand,
A pair of left and right rear levers 15b, 15b having a fulcrum 15a at a portion behind the connection portion of the intermediate horizontal frame 11b are swingably attached to the rear outer sides of the upper edge frames 11a, 11a. A V-shaped horizontal stay 15c is connected to form a rear support 15, and handles 15d are protruded from both ends of the horizontal stay 15c.

When the front receiving member 14 is tilted forward (see a chain line 14 in FIG. 3), the horizontal frame 11 at the front end of the packing box 10 is opened.
b (see FIG. 4), and is locked at the rearward position by the horizontal frame 11b at the rear end when it is tilted backward. When the rear receiving member 15 is tilted backward (see the chain line 15 in FIG. 3), the rear receiving member 15 is locked at the rearward position by the locking device 20 provided on the upper portion of the rear frame 11d. The front frame is locked at the forward position by the laterally projecting end of the horizontal frame 11b (see a chain line 15 in FIG. 8).

The above-described locking device 20 (see FIG. 6) has a shaft portion 22a of a J-shaped pin 22 slidably mounted on a rear frame 11d via a cylindrical receiving member 21 and a hook portion 22b. It is formed by supporting the shaft portion 22a outward in the width direction by the compression coil spring 23 when the rear receiving member 15 is tilted to the rearward position. , The horizontal hole 1 provided in the rear lever 15b
5e is a tip 22c of the hook 22b of the J-shaped pin 22.
Is fixed by fitting. When the rear receiving member 15 is tilted to the forward position, the J-shaped pin 22 is slid outwardly against the urging force of the compression coil spring 23 (see the chain line), and the hook portion 22b is turned downward. Wait. Reference numeral 24 denotes a washer for receiving a spring.

On the other hand, at the front lower end of the packing box 10 (FIG. 3)
), And a pair of left and right front wheels 16 are rotatably mounted by an axle 16 a fixed to the lower surface of the frame 11 so as to be positioned outside the lower part of the packing box 10. The front wheel has a diameter of 650 mm with a solid rubber tire.
A rear free wheel 17 is attached to the center of the lower surface of the rear part of the packing box 10 (see FIGS. 3 and 5), and the packing box 10 is supported substantially horizontally by the rear free wheel 17 and the pair of front wheels 16. You. The wheel 17a of the rear adjustable wheel 17 is
It has a diameter of 250 mm with a solid rubber tire.

In the embodiment shown in FIG. 3, the left and right rear frames 11d, 1
1d extends below the bottom of the packing box 10, and the lower end of the rear frame 11d and the lower rear surface of the frame 11 are slanted.
linked by f. Stands 18 protrude respectively near the upper and lower ends of the rear frame 11d, and a total of four stands 18 project rearward of the packing box 10 so as to be arranged on the same vertical plane.

In the above structure, as shown by a chain line in FIG. 3, the front receiving member 14 is tilted forward, the front receiving member 14 is locked in the forward position by the front horizontal frame 11b, and the rear receiving member 15 is tilted rearward. When it is locked in the rearward position by the end locking device 20, the horizontal stay 14c of the front receiving member 14, the front end, the middle and rear end horizontal frames 11b on the packing box 10, and the side of the rear receiving member 15 are provided. A long object such as a reinforcing bar F (see FIG. 7) is placed on the stay 15c, another short object is stacked in the middle packing box 10, and an operator manually handles a handle 15d protruding from the rear receiving member 15. And can be transported. In this case, since the lever 15b of the rear receiving member 15 is locked by the locking device 20, even if the handle 15d of the rear receiving member 15 is lifted, the lever 15b does not break at the fulcrum 15a.

Further, the front receiving member 14 is tilted backward and locked at a rearward position by the rear end horizontal frame 11b.
5 is folded forward, the front receiving member 14 and the rear receiving member 15 are folded on the packing box 10 by being locked at the forward position by the projecting end of the horizontal frame 11b at the front end, and only the packing box 10 is used. To transport short items. Also, when the packing box 10 is empty, the entire car can be erected by raising the packing box 10 so that the four stands 18 at the rear end face downward. And becomes easier to load in elevators and store in warehouses.

In the embodiment shown in FIGS. 1 and 2, the packing box 10 is made up of a pipe frame 11, a dish-shaped bottom plate 12 and a wire mesh side wall 13 as in the embodiment shown in FIGS. This packing box 10 is supported substantially horizontally by a rear free wheel 17 and a pair of left and right front wheels 16, and a pair of left and right front receiving members 14 and a rear part are provided on the upper front edge and the rear upper edge of the packing box 10, respectively. The receiving member 15 is swingably connected to the front and rear, and the front receiving member 14 and the rear receiving member 15 are supported at both the front position and the rear position, respectively. In the embodiment of FIG. 1 instead of the V-shaped horizontal frame 11b, the linear horizontal frame 11e, and the intermediate V-shaped horizontal frame 11b, only the U-shaped horizontal frame 11b is provided at the front end, the middle and the rear end, respectively. Club holder 1
4 horizontal stay 14c and the rear stay 15
5c are each formed in a U-shape.

A locking pin 11g is protruded laterally near the upper end of the vertical frame 11c at the front end.
The rear receiving member 15 is locked at the front position above (see FIG. 2). In the embodiment shown in FIG. 1, semicircular stands 18 are protrudingly provided near the upper and lower ends of the rear frame 11d.

In the embodiment shown in FIGS. 9 and 10, a pair of left and right front auxiliary wheels 30 are provided behind the pair of left and right front wheels 16 so as to be able to move up and down. That is, a sector plate 31 is rotatably mounted on a horizontal axis at a lower end of a frame 11 constituting a bottom portion of the packing box 10 by a support shaft 32, and a front auxiliary wheel having a diameter of 200 mm and having a rubber solid tire at one end of the sector plate 31. And an arc-shaped slot 3 provided near the outer periphery of the sector plate 31.
A bolt 33 is passed through 1a, its tip is screwed into the above-mentioned frame 11, and the sector plate 31 is fixed in an arbitrary phase by tightening the bolt 33 with a fastening handle 34 passed through its head.

A locking handle 35 projects rearward from the other end of the sector plate 31, and a hook-like stopper 36 is fixed upward to the frame 11 so that the locking handle 35
When the front auxiliary wheel 30 is positioned vertically below the support shaft 32 when the front auxiliary wheel 30 is positioned vertically below the support shaft 32, the front auxiliary wheel 30 is positioned 150 mm behind the ground point of the front wheel 16.
mm (a distance equal to one half of the mountain distance of the deck plate), and is positioned so as to contact the inside of the front wheel 16. Therefore, when traveling on uneven terrain such as a deck plate, either the front wheel 16 or the front auxiliary wheel 30 is in contact with the mountain to allow smooth running, and when a load is applied to the front auxiliary wheel 30, the fan-shaped The front auxiliary wheel 30 is not displaced upward by the plate 31 turning. In the case of traveling on flat ground, the front auxiliary wheel 30 is lifted off the ground smoothly by loosening the bolt 33, removing the locking handle 35 from the stopper 36, turning upward, and fastening the bolt 33. You can run.

In this embodiment, a rear auxiliary wheel 37 has a diameter of 2 mm between the left and right front auxiliary wheels 30 and the rear free wheel 17 (480 mm ahead of the rear free wheel 17).
A 50 mm wheel 37a is provided so as to float about 10 mm from a plane where the front wheel 16 and the rear adjustable wheel 17 are in contact.
Therefore, it is possible to prevent one of the rear adjustable wheel or the rear auxiliary wheel 37 from falling into the concave portion during running on uneven terrain such as a deck plate, thereby enabling smooth running. In this embodiment, a rear adjustable wheel 17 having a brake is used, and when the packing box 10 is folded upright,
The wheel 17a, which is non-rotatably fixed, functions as a stand 18.

[0023]

According to the first aspect of the present invention, there is provided a front receiving member comprising a pair of left and right front levers and a U-shaped or V-shaped horizontal stay at the front edge of an upper edge of a rectangular parallelepiped packing box. And a pair of right and left rear levers and a U-shaped or V-shaped horizontal stay provided at the rear end of the upper edge so as to be swingable and to be locked at both the frontward position and the rearward position. Therefore, if the front receiving part is tilted forward and the rear receiving part is tilted to the rearward position and locked, a long object such as a reinforcing bar can be put between the horizontal stays of the front and rear receiving parts, Conversely, if the front catch is lowered to the rearward position and the rear catch is tilted to the forward position and locked, the packing box becomes compact and only short items can be stored and transported in the packing box. Yes, and if empty, place the packing box By standing to be lower, it is possible to accommodate the elevator and warehouses.

Further, the packing box is supported by a small-diameter rear free wheel attached to the center of the rear bottom of the bottom and large-diameter front wheels attached to the front left and right of the packing box.
Even on a rough terrain such as a deck plate at a construction site, even if the rear free wheel falls into the groove, only the front wheel hardly falls, and it can easily get over the step, and any materials and tools can be easily removed. It can be transported smoothly.

According to a second aspect of the present invention, the packing box according to the first aspect of the present invention has a rectangular parallelepiped frame formed by connecting a number of pipes, and a rectangular shape fitted to the inner bottom thereof. Formed from a thin plate-shaped bottom plate made of the above and a net-made side wall stretched over the upper portion of the dish-shaped bottom plate, so that if a small object such as a bolt or a nut is put in the packing box, it may spill. And the weight of the packing box can be reduced.

According to a third aspect of the present invention, a pair of left and right front auxiliary wheels having a small diameter are provided so as to be vertically movable slightly behind the left and right front wheels, and the rear auxiliary wheels are slightly lifted in front of the rear adjustable wheels. Since it is provided in the, especially when used in a place with a lot of unevenness, by grounding the front auxiliary wheel, it is possible to prevent the front wheel and the rear free wheel from falling into the concave portion,
On a flat ground, by raising the front auxiliary wheels, the front auxiliary wheels and the rear auxiliary wheels can be lifted off the ground and run without trouble.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of the present invention in a state in which front and rear receiving members are expanded.

FIG. 2 is a perspective view showing a state where the receiving member of FIG. 1 is folded.

FIG. 3 is a side view of another embodiment.

FIG. 4 is a plan view of the embodiment of FIG.

FIG. 5 is a rear view of the embodiment of FIG. 3;

FIG. 6 is a front view of the locking device.

FIG. 7 is a sectional view taken along line AA of FIG. 4;

FIG. 8 is a sectional view taken along line BB of FIG. 4;

FIG. 9 is a side view of still another embodiment.

FIG. 10 is a perspective view of a main part of FIG. 9;

[Explanation of symbols]

10: packing box, 11: rectangular parallelepiped frame made of pipe, 1
2: dish-shaped bottom plate, 13: side wall made of wire mesh, 14: front holder, 14b: front lever, 14c, 15c: horizontal stay,
15: rear support, 15b: rear lever, 16: front wheel,
17: rear adjustable wheel, 18: stand, 20: locking device,
22: J-shaped pin, 30: front auxiliary wheel, 31: revolvable fan-shaped plate, 37: rear auxiliary wheel.

Continuing on the front page (72) Inventor Hozumi Yokota 4-73, Higashi-Nobumatsu, Himeji-shi, Hyogo Japan (72) Inventor Takao Otsuka 4-73, Higashi-Nobusue, Himeji, Hyogo Japan Technical Center (56) References Japanese Utility Model Showa 58-64323 (JP, U) Japanese Utility Model Showa 62-102766 (JP, U)

Claims (3)

(57) [Scope of request for utility model registration] 1. A rectangular parallelepiped packing box which is long in the front and rear direction is supported by a small-diameter rear free wheel attached to the lower center of the bottom of the rear part of the packing box and large-diameter front wheels attached to the front left and right of the packing box. The horizontal frame connecting the left and right upper edge frames of the packing box is U-shaped.
Or a V-shape, and a pair of left and right front levers can swing back and forth on the front edge of the upper edge of the packing box , and the front levers face rearward.
The front ends of the left and right front levers are connected by a U-shaped or V-shaped horizontal stay so that the front ends of the front levers do not protrude from the packing box when they are tilted. Horizontal position
A front receiver is formed in which the upper surface of the tape is recessed , and a pair of left and right rear levers are swingably connected to the rear end of the upper edge of the packing box, and the ends of the left and right rear levers are U-shaped or V-shaped. horizontal stearyl at rearward position of the rear lever connected by transverse stays
A rear receiving member having a concave upper surface, and locking means for supporting the front receiving member and the rear receiving member at both the front position and the rear position, respectively; Haul truck. 2. A packing box having a rectangular parallelepiped frame formed by connecting a large number of pipes, a rectangular thin plate-shaped bottom plate fitted to an inner bottom thereof, and a packing box stretched over an upper portion of the plate-shaped bottom plate. 2. The cart according to claim 1, wherein the cart is formed by a wire mesh side wall. 3. A pair of left and right front auxiliary wheels having a small diameter are provided so as to be able to ascend and descend so as to be slightly behind the ground point of the left and right front wheels. The hand-carriage vehicle according to claim 1 or 2, wherein a small-diameter rear auxiliary wheel is provided in the middle so as to float from a plane where the front wheel and the rear adjustable wheel are in contact.