JP3374233B2 - Cart - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trolley for lifting and transporting an object to be transported such as a caster or a case with legs and a cold storage tank.

[0002]

2. Description of the Related Art As a conventional technique, a cross frame extending in the left-right (width) direction is provided with a support base having a pair of side frames projecting forward and having a U-shape in plan view, and a wheel is mounted on the support base. To provide. Also, left and right (width)
A lifting bar having a pair of U-shaped arms protruding forward is provided at both ends of a cross bar extending in the direction, and a shelf portion is provided at the lower end of each arm so as to project toward each other. Then, the elevating table is fitted inside the supporting table, the arm of the elevating table and the side frame of the supporting table are connected by a parallel link mechanism, and the elevating table is supported by the parallel link mechanism. Up and down with respect to
There was a trolley in which wheels were provided on a support base.

[0003]

SUMMARY OF THE INVENTION In the above-mentioned prior art, when the wheels (casters) provided on the lower part of the object to be transferred or the legs are located on the outer side of the object to be transferred, the shelves of the elevators are lowered. However, there is a disadvantage that the rack portion cannot collide with the lower surfaces of both sides of the object to be conveyed due to collision with the wheels or legs, and it becomes impossible to convey this kind of object to be conveyed. The present invention is
It is an object of the present invention to obtain a new trolley that eliminates the above drawbacks.

[0004]

In order to achieve the above object, the present invention is configured as follows. That is, a pair of side frames are provided on both ends of the cross frame so as to be integrally fixed toward the front, and a support base having a U-shape in plan view is provided.
An elevating frame is arranged in parallel with the cross frame at the rear part of the support base, and the elevating frame is vertically movably connected to a column that is vertically fixed to the rear part of the support base, and a pair of support arms are connected to the side frame. The support arms are arranged parallel to each other and slidably connected to the elevating frame in the contacting / separating direction at their rear ends, and each support arm integrally has a shelf portion projecting in the approaching direction at the lower end thereof, and at least the shelf portion is A lift device for moving the lifting frame up and down, a relief recess partially cut out on the rear side, a lateral moving device for moving the support arms in the contact and separation directions, and a wheel for supporting the support base. And is provided. In this case, a stopper that comes into contact with the rear surface of the object to be conveyed may be provided at the rear portion of the elevating frame so as to be adjustable in forward and backward movement.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In the drawings, FIG. 1 is a sectional side view showing a first embodiment of the present invention, FIG. 2 is a partial sectional plan view thereof, FIG. 3 is an enlarged sectional view of an essential part taken along line III-III of FIG. 2, and FIG. 3 is an enlarged sectional view of an essential part corresponding to FIG. 3, showing an embodiment of FIG. 5, FIG. 5 is an enlarged plan view of an essential part of another embodiment of the lateral movement device, and FIG. 6 is an enlarged side view of a stopper part.

1 and 2, reference numeral 1 is a carriage, and 2 is a supporting base thereof. The support base 2 is formed by a square pipe material into a U-shape in a plan view, and the front wheels 3 are rotatably attached to the front ends of the side frames 2b extending in the front-rear direction (the left-right direction in the drawing). Rear wheels 4 made of casters are rotatably attached to the left and right ends of a cross frame 2a extending in the vertical direction in FIG. The front wheel 3 is fitted into a window hole 5 opened at the front end of each side frame 2b, and is rotatably attached via a shaft pin (reference numeral omitted).
The rear wheel 4 is attached to the rear end of the auxiliary frame 6 by fixing the auxiliary frame 6 to the rear ends of the cross frame 2a so as to project rearward.

A front strut 7 and a rear strut 8 made of pipe are erected and fixed at the front and rear of each auxiliary frame 6, and the front strut 7 is fixed.
Has its upper end curved rearward in a U-shape in plan view, and this portion is used as a handle 9. Further, the upper end rear portion of the front support column 7 is connected to the upper end of the rear support column 8 for reinforcement. In addition, the receiving plate 1 is provided at an intermediate portion in the left-right (longitudinal) direction of the cross frame 2a.
0, the hydraulic cylinder 12 forming the lifting device is erected and fixed to the receiving plate, and the sprocket 13 is rotatably mounted on the upper end of the rod 12b of the hydraulic cylinder 12.

The hydraulic cylinder 12 is a commercially available product, and the rod 12b is moved upward (extension operation) by swinging the pump lever 12c up and down with a foot, and the valve switching lever 12d is operated to move upward. The moved rod 12b is moved downward (shortening operation). Reference numeral 11 is a reinforcing bar that supports the upper end of the case 12a of the hydraulic cylinder 12.

An elevating frame 15 made of a square pipe is arranged in parallel with the cross frame 2a at the rear portion of the support base 2, that is, above the cross frame 2a, and both ends thereof can be moved up and down on each of the front support columns 7. Link. That is, as shown in FIG. 5, U-shaped rear brackets 16 sandwiching both sides of the front support column 7 are fixed to the left and right ends of the lifting frame 15 by welding, and the front support columns 7 are arranged above and below each rear bracket 16. A roller 17 abutting on the rear surface is rotatably attached, and while the roller 17 is rolling, the elevating frame 15 is connected so as to be vertically movable along the front support 7.

The chain 14 is hooked on the upper half of the sprocket 13, the one end of which is attached to the lifting frame 15, and the other end of which is the case 12 of the hydraulic cylinder 12.
The hydraulic cylinder 1 is connected to the reinforcing bar 11 that supports a.
2 is expanded and contracted to move the elevating frame 15 to the front support column 7
Move up and down along.

A connecting bar 19 is attached to the front portion of the elevating frame 15 so as to extend in the left-right direction (front-back direction in FIG. 2) via a front bracket 18, and a pair of support arms 20 projecting forward to the connecting bar 19. Is mounted so that it can slide left and right. In this support arm 20, a pair of L-shaped steel arm bodies 20a are arranged in parallel in the front-rear direction, the lower sides are opposed to each other to form a shelf portion 20b, and a mounting pipe 20c made of a square pipe is provided at the rear end portion. Are joined together by welding, and a reinforcing plate 20d having a triangular shape in a side view is welded and fixed to both joints so as to be reinforced so as to withstand a vertical load.

Further, the shelf 20b on the rear side of the support arm 20 is partially removed to form an escape recess 21. The escape recess 21 has a size such that a rear wheel (leg) 41 provided in the lower portion of the transported object 40 is fitted in the left-right direction.
The escape recesses 21 may be provided at predetermined intervals in the front-rear direction of the shelf 20b so as to be fitted to the wheels 41 in the front-rear direction of the transported object 40, or three in the front-rear direction. You may make it correspond to the to-be-conveyed object 40 which has the wheel of this. The upper end of the mounting rod 20c is slidably fitted to the connecting bar 19 described above, and the rear surface of the mounting bar 20c is brought into contact with the front surface of the elevating frame 15 to regulate the vertical rotation.

Each of the support arms 20 is a lifting frame 1.
It is moved in the contacting / separating direction by a pair of lateral moving devices 25 provided on the upper part of the unit 5. One of them (left part) will be described with reference to FIGS. That is, the groove-shaped lever brackets 26 are attached to the left and right ends of the elevating frame 15, and the operating levers 27 are provided on the lever brackets 26 on the fulcrum pins 26a and the operating levers 27 in the front-rear direction provided on the upper ends of the lever brackets 26. Further, it is attached so as to be swingable to the left and right and slightly movable up and down through the vertical elongated hole 27a. Further, an elongated hole 26b in the left-right direction is formed in the lower portion of the lever bracket 26, and a connecting pin 27b in the front-rear direction provided at the lower end of the operation lever 27 is fitted in the elongated hole 26b so as to be slidable in the left-right direction.

The connecting pin 27b is used for the lifting frame 15
Of the support arm 2 described above at the protruding end.
Connect 0. That is, as shown in FIGS. 1 and 2, the groove-shaped connecting bracket 20e is fixed to the upper surface of each mounting rod 20c of the support arm 20, and the connecting pin 27b is inserted into the connecting bracket 20e. As a result, the above-described operation levers 27 are moved to the left and right to move the support arms 20 in the left-right direction (contact / separation direction), and the shelf portion 20b is moved to the transported object 4.
Engage on the left and right undersides of 0.

In FIG. 3, reference numeral 30 denotes a biasing spring composed of a coil spring, which is tensioned between the lower portion of the operating lever 27 located above the fulcrum pin 26a and the elevating frame 15 located below the fulcrum pin 26a. Stop, operation lever 27
This prevents the operating lever 27 from being inadvertently rotated in the opposite direction when is rotated left or right. In addition, as shown in FIG. 4, the aforementioned long hole 26b has the left and right ends 26c.
Is tilted or bent downward, and when the operation lever 27 is rotated left or right, the connecting pin 27b is dropped to the left and right ends 26c to enhance the careless rotation prevention function of the operation lever 27. You may

Further, a stopper 23 projecting forward is attached to the above-mentioned mounting rod 20c of the support arm 20 and the stopper 23 is made to collide with the rear surface of the object 40 to be conveyed so that the support arm 20 with respect to the object 40 is conveyed. The locking position is set so that the escape recess 21 of the support arm 20 easily faces the wheels (legs) 41 of the transported object 40.
As shown in FIG. 6, the stopper 23 has a screw shaft 23a screwed onto the attachment rod 20c, and a front end thereof fitted with a backing plate 23b that collides with the rear surface of the transported object 40.
A handle 23c may be provided at the rear end of the screw shaft 23a, and the handle plate 23b may be operated to rotate the screw shaft 23a forward and backward to adjust the back-and-forth movement of the contact plate 23b. By doing so, it is possible to appropriately correspond to the transported object 40 in which the positions of the wheels (legs) 41 are different.

The lateral movement device 25 described above may be configured as shown in FIG. That is, the left and right halves are provided with connection screw shafts 33 that are threaded reversely, and the connection screw shafts 33 are provided to the front of the elevating frame 15 through the front bracket 18 so as to be left and right (up and down in FIG. 5). The pair of support arms 20 is screwed onto the screw shafts 33 at the rear ends thereof, that is, the upper ends of the mounting rods 20c. A handle 34 is attached to one end (right end) of the connecting screw shaft 33, and a grip 35 is attached to the outer end of the handle so as to be slidable in the left-right direction. When not in use, the grip 35 is moved inward in the left-right direction. The inner end of the connecting screw shaft 33 is fitted into the hole 36 formed in the side portion of the elevating frame 15 to prevent the connecting screw shaft 33 from rotating unintentionally.

[0018]

As is apparent from the above description, according to the present invention, an elevating frame which is moved up and down by an elevating device is provided at the rear part of a support base formed in a U-shape in plan view, and the elevating frame is connected by a lateral moving device. Since a pair of support arms to be moved in the separating direction are provided so as to project forward, a recessed portion into which a wheel or a leg of the transported object is fitted is provided on the shelf portion projecting in the approaching direction at the lower end of each support arm. Objects to be conveyed having wheels or legs at the bottom can be easily conveyed. Further, since a stopper that comes into contact with the rear surface of the object to be conveyed is provided in the rear portion of the lifting frame so that the front and rear movements can be adjusted, even if the object to be conveyed has different wheel or leg positions, There is an effect that the above-mentioned escape recess can be easily dealt with.

[Brief description of drawings]

FIG. 1 is a sectional side view showing a first embodiment of the present invention.

2 is a partial cross-sectional plan view of FIG.

FIG. 3 is an enlarged cross-sectional view of a main part taken along the line III-III of FIG.

FIG. 4 is an enlarged sectional view of an essential part corresponding to FIG. 3 showing another embodiment.

FIG. 5 is an enlarged plan view of an essential part showing another embodiment of the lateral movement device according to the present invention.

FIG. 6 is an enlarged side view of a stopper portion according to the present invention.

[Explanation of symbols]

1 dolly ． 2 support 2a cross frame 2b side frame 3 front wheels 4 rear wheels 5 window holes 6 Auxiliary frame 7 front support 8 rear columns 9 handle 10 Support plate 11 Reinforcing bar 12 Hydraulic cylinder (lifting device) 12a rod 12b case 12c pump lever 12d valve switching lever 13 sprockets 14 chains 15 Lifting frame 16 rear sprocket 17 rollers 18 front bracket 19 Connection bar 20 Support arm 20a arm body 20b shelf 20c Mounting rod 20d reinforcing plate 20b shelf 20c Mounting rod 20d reinforcing plate 20e Connection bracket 21 escape recess 22 Connection bracket 23 Stopper 23a screw shaft 23b Reliable plate 23c handle 24 screw shaft 25 Lateral movement device 26 Lever bracket 26a Support point pin 26b long hole 26c Left and right ends 27 Operation lever 27a long hole 27b Connection pin 30 biasing spring 33 Connection screw shaft 34 handle 35 grip 36 holes 40 Transported object 41 wheels (legs)

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B62B 3/06 B62B 3/10

Claims (2)

(57) [Claims] 1. A support base (2) having a U-shape in plan view formed by integrally fixing a pair of side frames (2b) toward the front at both ends of a cross frame (2a), and the support base ( 2)
An elevating frame (15) is arranged in the rear part in parallel with the cross frame (2a), and the elevating frame (15) can be moved up and down on a column ((7) standingly fixed to the rear part of the support base (2). And a pair of support arms (2
0) is arranged parallel to the side frame (2b) and slidably connected to the elevating frame (15) at its rear end in the contact and separation directions, and each support arm (20) approaches the lower end of each other. Has a shelf (20b) projecting in the same direction, and at least a rear side of the shelf (20b) is provided with a partially recessed escape recess (21) to vertically move the elevating frame (15). A lifting device (12) for moving,
A trolley provided with a lateral movement device (25) for moving each of the support arms (20) in a contacting / separating direction, and wheels (3, 4) for supporting the support base (2). 2. A trolley according to claim 1, wherein a stopper (23) for contacting a rear surface of the transported object is provided at a rear portion of the elevating frame (15) so as to be adjustable in forward and backward movement.