JP2869952B2 - A trolley having a lifting load receiving part - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bogie having an elevating and lowering receiving portion capable of always holding articles such as parts at a fixed height and performing an unloading operation in an easy posture. It is.

2. Description of the Related Art Conventionally, as a truck of this type, for example,
There is provided an automatic up-and-down moving work cart disclosed in Japanese Patent Publication No. 427. In this conventional type, a vehicle body is formed in a rectangular plate frame shape, wheels are arranged at four corners thereof, and a column is erected from a rear portion of the vehicle body. A mounting table is provided which moves up and down while being guided by the support, and a chain is disposed between the mounting table and the upper part of the support via a fixed sprocket. A movable sprocket is hung on the chain. A plurality of springs are arranged between a hanger plate on which the movable sprocket is mounted and a vehicle body, and a fixing hydraulic cylinder is provided.

According to this conventional type, since the mounting table is suspended from the spring group, when an article is not mounted on the mounting table, the article is lifted above the column by the restoring force of the spring group. I have. When an article is placed on the mounting table, the tension applied to the chain causes the hanger plate to rise against the contraction force of the spring group, thereby lowering the mounting table in accordance with the load. Such an operation is performed with the hydraulic cylinder opened, and by appropriately closing the hydraulic cylinder, the mounting table stops at that position regardless of the load.

Problems to be Solved by the Invention According to the above-mentioned conventional type, the traveling of the work vehicle is performed, for example, by pushing forward through a handle provided on the upper rear surface of the column or by moving backward by pulling through the handle. At that time, the body is rectangular and frame-shaped, and the weight is large, so it is not possible to push and pull lightly. Also, when performing pulling travel (reverse) in the posture facing the traveling direction, the heel near the lower rear end of the body It will penetrate and damage Achilles Ken.

SUMMARY OF THE INVENTION An object of the present invention is to provide a bogie having an ascending / descending load receiving portion which can be lightened as a whole and which can safely perform pulling (reverse) in a posture directed to the traveling direction.

Means for Solving the Problems In order to achieve the above object, a truck having a lifting / lowering receiving portion according to the present invention comprises a base stand, a pair of left and right side frames having front and rear wheels, and an intermediate portion near the rear end of these side frames. With the connecting frame connecting between the connecting frames, the connecting frame is formed into an H-shape in plan view by providing recesses in front and rear of the connecting frame, and a turning support shaft of the rear wheel is provided on the rear end side frame, and both sides are provided from the connecting frame. The support members are erected from the upper surface over the frame, the back panel is disposed between the rear surfaces between the support members, the front panel is disposed between the front surfaces, and the table is mounted on a carriage that can be raised and lowered on the front side of the support members. Is established,
A handle is provided on the upper part of the rear surface of the support member, and the grip portion of the handle is disposed in the left-right direction near the rear end of the side frame and above the concave portion on the rear end side.

According to the configuration of the present invention, since the base table has an H shape, the weight can be reduced. Then, the hand pushing traveling (forward movement) through the grip portion of the handle can be performed while the toe is positioned near the concave portion formed on the rear end side of the base table. In addition, pulling (reversing) in a posture facing the traveling direction can be performed while the heel is positioned near the above-described recessed portion.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes a base, which is formed into an H shape by a pair of left and right side frames 1A and a transition frame 1B for connecting between intermediate portions near the rear end of the side frames 1A.
Have concave portions 1C and 1D before and after. Front wheels 3 are attached to the front lower surface of both frames 1A via fixed brackets 2, and rear wheels 5 are attached to the rear lower surface via turning brackets 4. Reinforcing members 6 are mounted in the frames 1A on both sides, and corner members 7 made of resin are mounted on front and rear ends of the frames 1A on both sides.

A support member 10 is erected from the upper surface extending from the crossover frame 1B to both side frames 1A. The support member 10 includes a pair of left and right posts 11 erected from the frames 1A on both sides, a lower beam 12 connecting between lower ends of these posts 11, an upper beam 13 connecting between upper ends, and both posts 11 and both beams. 12,1
3 Back panel 14 located between the rear faces, and both beams 12, 13
And a top resin cover 16 disposed between the upper ends of the posts 11 and the upper surface of the upper beam 13. And front panel 15
A vertical slit 17 is formed between a side edge of the post and an inner side surface of each of the posts 11. Both posts 11 are aluminum rails, and guide grooves 18 are formed over the entire length on opposing inner surfaces. Further, a handle 21 is provided on the rear side of the upper portion of the support member 10. The handle 21 has a pair of left and right brackets 22 fixed to the rear side of the posts 11 and extending rearward, and is mounted between the free ends of the brackets 22 and arranged in the left and right direction above the rear recess 1D. And a pipe body (gripping part) 23 to be provided.

A carriage 30 that can be moved up and down is provided in the support member 10. The carriage 30 includes a pair of left and right side frames 31, a lower frame 32 connecting between lower ends of these side frames 31, an upper guide roller 34 attached to upper outer surfaces of both side frames 31 via roller pins 33, and the like. It comprises a lower guide roller 36 attached to the lower outer surface of the frame 31 via a roller pin 35 and the like, and a connecting member 37 provided continuously from the lower part of the both sides frame 31 to the front.
The guide rollers 34 and 36 are made of resin and fitted in the guide grooves 18 of the post 11 to be guided up and down. Further, the connecting member
37 protrudes outward from the front surface of the support member 10 through the slit 17 and is vertically movable on the front surface side.

A table 40 is disposed in front of the support member 10, and the table 40 is fixed between a pair of left and right connecting members 37 via a connecting member 41. The table 40 is entangled with a U-shaped reinforcing member 42 in a plan view and a rectangular resin plate 43 disposed in a state of covering the reinforcing member 42 in a plan view, via both free ends of the reinforcing member 42. The reinforcing member 42 is fixed to the connecting member 37 via both free ends of the reinforcing member 42. The resin 43 has a reinforcing rib portion integrally formed on the lower surface side thereof in a lattice shape, and further has a stopper portion 43a upwardly formed from the rear end.

Between the support member 10 and the carriage 30, there is provided an upward movement applying device 50 for urging the carriage 30 upward. That is, in the frame of the carriage 30, a plurality of (seven in this embodiment) springs which act as an example of an elastic body and which act in an up-down direction in the left-right direction are arranged. Here, the pair of springs at both ends is a stationary spring 51, and the remaining five are switching springs.
It becomes 52. The lower ends of the springs 51 and 52 are connected to the lower frame 32 of the carriage 30 via a bolt-nut type lower connecting tool 53 whose vertical position is adjustable. The upper ends of the pair of stationary springs 51 are connected to the upper beam 13 of the column member 10 via a bolt-nut type upper connecting member 54 whose vertical position is adjustable. Here, the operating nut of the upper connecting member 54 is exposed above the upper beam 13. The upper end of the remaining switching spring 52 is bent into a hook shape to form a locked portion 55.

When the carriage 30 reaches the ascending limit, a plurality of locking members 60 that can be individually engaged with and disengaged from the locked portion 55 are provided on the column member 10. That is, an operation pin 61 in the front-rear direction is rotatably attached to the upper beam 12.
The locking member is hook-shaped, and its base is
By being externally fitted and fixed to the pin 55, it can swing around the axis of the pin, and thus can be freely disengaged from the locked portion 55.

Note that a stopper 68 is provided on the lower surface of the tip of the table 40 so as to be able to abut on the upper surface of the side frame 1A when the table 40 reaches the lowering limit. Reference numeral 69 denotes a load to be handled, which is formed, for example, by stacking a plurality of cases each containing a large number of articles.

 Next, the use state of the above embodiment will be described.

1 to 4 show a state in which all the locking tools 60 are in the operating position. When the load 69 is placed on the table 40 in this state, the load is transmitted to the carriage 30 via the connecting member 37 and the like, and the carriage 30 is lowered against the elastic force of each of the springs 51 and 52. At that time, all the springs 51,5
Since 2 acts, the load 69 with the maximum load can be handled. When the maximum load is exceeded or the load exceeds this, the table 40
A stopper 68 attached to the lower surface of the front end of the frame abuts on the upper surface of the side frame 1A (see the phantom line in FIG. 2), and the load is
And the connection member 37 to be dispersed and supported.

The bogie supporting the load 69 as described above moves forward when the operator pushes and runs through the handle 21. At this time, the manual pushing is performed by the recessed portion 1D formed on the rear end side of the base table 1. This can be done while positioning the toes near the. In addition, when the worker pulls and runs through the handle 21 in a posture facing the traveling direction, the worker moves backward, and at that time, the pulling operation can be performed while the heel is positioned near the above-described recessed portion 1D. Therefore, both the hand pushing traveling and the pulling traveling can be performed without the foot colliding with the base 1 side.

After carrying the load 69 to a predetermined place via the trolley, for example, the articles are taken out one by one while being processed or assembled into another article. At this time, the load due to the load 69 gradually decreases, and accordingly, the carriage 30 gradually increases by the elastic force of the springs 51 and 52. This allows loading
The upper surface (article removal action surface) of 69 is kept constant or almost constant. When the load 69 on the table 40 is emptied, as shown in FIGS.
The table 40 rises to the upper limit via.

When the carriage 30 is at the upper limit position as described above,
The locked portion 55 is slightly lifted and loosely locked by the locking tool 60.

When the load of the load 69 to be handled is light and it is not necessary to use all the springs 51 and 52, the number of used load 69 is reduced while the load 69 is empty. That is, a spring that is to be switched to non-use
The operation pin 61 corresponding to 52 is rotated. As a result, the locking member 60 is released from the locked portion 55, so that the locking member 60 becomes horizontal.

In this way, the number of acting springs 52 can be changed according to the maximum load of the load 69 to be handled.

The above-described lifting and lowering of the carriage 30 is performed on a fixed path by the guide rollers 34 and 36 being guided by the guide grooves 18. At this time, the upper guide roller 34 is guided by the front guide surface and the lower guide roller 36 is guided by the rear guide surface due to the unbalanced load applied to the table 40.

Note that, for example, the empty case is removed, but is placed between the two side frames 1A using the lower part of the raised table 40.

Effect of the Invention According to the present invention having the above-described configuration, the base table is H-shaped in plan view, so that the weight can be reduced, the back panel is arranged between the rear surfaces between the support members, and the front panel is arranged between the front surfaces. Therefore, the load to be handled can be prevented from dropping unexpectedly during the manual driving (forward), and the operator is safe.

Further, since the grip portion of the handle is located near the rear end of the side frame and is disposed in the left-right direction above the recessed portion on the rear end side, it is possible to efficiently apply a pushing / pulling force. Running by pulling can be performed lightly. In the pulling travel (reverse travel) and the hand pushing travel (forward travel) in the posture facing the traveling direction, the foot may collide with the base table side (stumbling) due to the concave portion formed on the rear end side of the base table.
It can be performed without getting under the base, and it is possible to perform safe driving.

[Brief description of the drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a perspective view of the entire bogie, FIG. 2 is a side view with the same part cut away, FIG. 3 is a cross-sectional plan view of the same, and FIG. FIG. 1 ... base stand, 1A ... side frame, 1B ... crossover frame, 1C, 1D ... recessed part, 3 ... front wheel, 5 ... rear wheel, 1
0 ... post member, 11 ... post, 17 ... slit, 18 ...
… Guide groove, 21… Handle, 22… Bracket, 23 …… Pipe, 30… Carriage, 34 …… Upper guide roller,
36 lower guide roller 37 connecting member 40 table 41 upper moving device 51 stationary spring 52 switching spring 60 locking Utensils.

Claims (1)

(57) [Claims] 1. A crossover connecting a base base (1) between a pair of left and right side frames (1A) having front and rear wheels (3, 5) and an intermediate portion near the rear end of these side frames (1A). With the frame (1B), recesses (1C, 1D) are formed before and after the crossover frame (1B) to form an H-shape in plan view, and the turning support shaft of the rear wheel (5) is located on the rear end side. The support member (10) is provided on the side frame (1A), and the support member (10) is erected from the upper surface extending from the transition frame (1B) to the both side frames (1A), and the back panel (14) is provided between the rear surfaces between the support members (10). ), The front panel (15) is placed between the fronts, and the support members (10)
The table (4)
0) is provided, and a handle (21) is provided on the upper rear surface of the support member. The grip portion of the handle is located near the rear end of the side frame (1A) and above the recessed portion (1D) on the rear end side. A trolley having a lifting / lowering load receiving portion, which is disposed in the left-right direction.