JPH11334602A - Stock cart - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stock cart that permits always stable retention when stopping at any case, an easy operation of locking of wheels for fixed caster and release of that, and free nesting in the lateral direction, with a configuration in which the fixed caster can be locked. SOLUTION: A stock cart 10 comprises a bogy frame with a nesting structure, free casters 2 which are fixed to the bottom face closer to the four corners of the bogy frame, a fixed caster 3 which is fixed to almost the center of the bottom face of the bogy frame, a base plate 4 which is rotatively fixed to a portion closer to the rear end of the boggy frame, braking means 6 for locking the wheels of the fixed caster 3, and brake operation means 50 for operating the braking means 6 to the locking and unlocking directions of the wheels of the fixed caster 3. By turning the base plate 4 upward, a face formed at the lower end of the fixed caster 3 is lifted by a face formed at the lower end of the free casters 2. Nesting is conducted by operation of the four wheels of the free caster 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stock cart having high nesting efficiency, which is used for transporting goods stored in cardboard boxes and the like and for storing and storing goods.

[0002]

2. Description of the Related Art Conventionally, a bogie of this type has been disclosed in Japanese Utility Model Laid-Open No. 6-37.
As is clear from Japanese Patent Publication No. 71 and the like,
A pair of fixed casters which are attached to both ends in the short direction at the center of the lower surface of the bogie frame with the rotation direction facing the direction of movement of the bogie, and attached to the both ends in the short direction on the lower surfaces at both ends in the long direction of the bogie frame. And a pair of swivel free casters, and an article mounting plate fixed on a trolley frame.

Further, a wheel having a diameter equal to or slightly larger than the universal caster is used as the fixed caster, and the bogie frame can be slightly moved in a seesaw motion with respect to the floor with the fixed caster as a fulcrum. This facilitates the direction change of the bogie. Further, a wheel with a stopper is used for the free caster, and the wheel is locked by operating the stopper in the locking direction so that the bogie can be held in a stopped state.

As shown in FIGS. 13 (a) and 13 (b), a swivel caster 120 is mounted on the bottom surface of the four corners of a substantially rectangular or M-shaped bogie frame. In the case of a stock cart composed of a trolley having a fixed caster 130 attached to the bottom of the trolley and a pair of movable shelf frames (not shown) detachably attached to the front and rear portions of the trolley 100, the trolley is stored. Nesting was performed in the longitudinal direction from one direction of the fixed casters to make the nesting state for storage.

[0005]

However, in the above-described conventional bogie, the bogie is held in a stopped state by operating a stopper provided on the free caster, so that the bogie is stably stopped. In order to hold the movable casters, all the swivel casters must be locked by stoppers, and at the time of locking or unlocking operation, an operator or the like must move around the bogie, which is complicated and time consuming. There is a problem that also takes. In addition, even if the wheels of the free caster are locked with stoppers, the swiveling motion of the free caster itself cannot be locked, and the fixed caster at the center of the bogie is always in a free state. When the bogie is stopped, even if the wheels of the swivel caster are locked, the swivel caster may turn due to the action of the bogie trying to slide down from the inclined floor surface. When it moves, there is a problem that the articles placed on the cart collapse. In particular, by making the wheel diameter of the fixed caster larger than the wheel diameter of the free caster, when the bogie itself performs a seesaw motion with the fixed caster as a fulcrum, the above-mentioned phenomenon becomes remarkable, and the bogie cannot be stopped and held stably. There was a problem. There is also a method of providing a brake operation lever next to the fixed caster and locking it.
When using several side-by-side stock carts, there is a problem that the lever cannot be stepped on. Further, in the case of the conventional nesting method, a large space is required in the longitudinal direction, so that there is a problem in that the space is effectively used.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a structure in which a fixed caster can be locked so that a stable stop can be maintained at any place and a fixed caster can be used even when several stock carts are used side by side. An object of the present invention is to provide a stock cart that can easily perform a wheel lock and unlock operation thereof and that can be nested in a short direction.

[0007]

Under such circumstances, the present inventors have conducted intensive studies and, as a result, completed the present invention. That is, the present invention provides a bogie frame having a nesting structure, a swivel caster mounted on a bottom surface near four corners of the bogie frame, a fixed caster mounted on a substantially middle bottom surface of the bogie frame, and A base plate rotatably attached to a portion near the end, a brake means for locking the rotation of the wheel of the fixed caster, and a brake for operating the brake means in the wheel locking direction and the unlocking direction of the fixed caster Operating means, the base plate is rotated upward to raise the surface formed by the lower end of the fixed caster above the surface formed by the lower end of the free caster, and An object of the present invention is to provide a stock cart characterized in that nesting is performed by actuation of casters. Thus, by operating the brake operating means in the wheel locking direction, the brake means locks the wheels of the fixed casters, so that the stock cart can be stably stopped and held even on an inclined floor or the like. In addition, when using a stock cart, unlock the brake means, move the base plate down and put your luggage on it, and you can move the seesaw type around the fixed caster, and you can freely change direction etc. Can be done. Also, when storing, that is, when nesting,
If the base plate is raised, the fixed casters become inoperable, so that only the four-wheeled swivel casters can travel, can move in the free direction, and can be nested in the short direction.
Therefore, the space can be effectively used.

According to a second aspect of the present invention, there is provided a pressing member in which the brake means is swingably supported by a bracket of the fixed caster and is adjacent to a wheel outer peripheral surface of the fixed caster. Or a pressing tooth member adjacent to the outer peripheral surface of the gear mounted on the wheel.

According to a fourth aspect of the present invention, the brake operating means includes an operating member pivotally mounted on the bogie frame, and a locking direction and a locking direction of the operating member. And a transmission member for transmitting an operation force when operated in the release direction to the brake means. The invention according to claim 5 of the present invention is characterized in that the operation member includes an operation lever for operating the brake means in a wheel locking direction, a wheel lock position for the operation lever, and a wheel lock for the operation lever. And a lock lever to be released. Thus, the operation member is constituted by the operation lever and the wheel lock and unlock lever, so that the fixed caster can be prevented from being locked inadvertently or unlocked.

According to a sixth aspect of the present invention, the bogie frame is formed in a Z-shape, an inverted Z-shape or an H-shape. The invention according to claim 7 of the present invention further includes a shelf frame detachably or fixedly attached to at least a rear end portion of the bogie frame. Further, the invention according to claim 8 of the present invention is characterized in that the shelf frame shape of the shelf frame on the side to be stored by rotating the platform plate upward is such that when nesting, the shelf plate of another adjacent stock cart is nested. And a concave portion which does not overlap with. Further, in the invention according to claim 9 of the present invention, a nesting regulating projection is provided at an upper end of a bogie frame rear end member on the side where the concave portion is formed and an opposing diagonal upper end of a bogie frame front end member. It is characterized by having.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a perspective view showing a state in which the base plate of the stock cart of the present invention is raised, FIG. 2 is a perspective view showing a state in which the base plate of the stock cart of the present invention is folded down, and FIG. FIG. 4 is an enlarged view, FIG. 4 is a side view, a part of which is a cross section taken along line AA of FIG. 3, FIG. 5 is an enlarged view of a rear end portion of FIG. 1, and FIG. FIG. 7 is a side view in which a part of the lower part of FIG. 2 is omitted, and FIG. 8 is a side view in which a part of the lower part of FIG. 1 is omitted. 1 to 8, a stock cart 10 includes a cart frame 1 with casters, a pair of shelf frames 5a and 5b, and a base plate 4.

The bogie frame 1 is composed of a front end member 101a and a rear end member 101b which are spaced apart from each other by a predetermined distance and arranged in parallel.
And a connecting member 202 that integrally connects the both end members 101a and 101b to form an H-shape. The free casters 2 and 2 are attached to the bottom surface of the member 101a at the front end of the bogie frame 1, the brake operating means 50 and the nesting restricting projection 70 are provided on the upper surface, and the shock absorbing pads 60 and 60 are provided on the end surface. Have been. Also,
The member 101b at the rear end has a lid shape without a bottom surface, has a through hole 102 in the upper surface of the central portion for loosely fitting the support portion 31 of the caster table 30, and is provided on the caster table 30 on the lid-shaped lower surface. Guide rods 32, 32 which are slidably inserted into the guide cylindrical parts 32, 32, and a nesting regulating protrusion 70 on the upper surface, like the member 101a at the front end, and an end face on the upper surface. A shock absorbing pad 60 is provided.

Both ends of the connecting member 202 have one end connected to the member 10.
Shelf frame holders 40, 40 fixed to 1a, 101b are provided. The shelf frames 5a, 5b are provided in the shelf frame holding units 40, 40.
The shelf frames 5a and 5b can be formed by inserting the supporting columns. The caster base 30 has a channel shape, and the free casters 2 are attached to both ends of the lower surface thereof.
Is pivotally supported or fixed.
The fixed casters 3 are attached to the center bottom surface of the connecting member 202 via the fixed caster support plate 7 and the fixed caster height adjusting plate 71.

The base plate 4 includes two pivotal connecting plates 42, 42 rotatably supported by shaft protrusions 51, 51 attached to the support rod 81 and the shelf frame 5b, and a rectangular base plate. A body 41;
And a base plate height adjusting plate 49. In addition, the rotation connecting plate 42
Is composed of a support rod pivot 421 located at the tip, an axial projection pivot 422, and a base plate latch 423. The shaft-shaped projection pivot 422 serves as a fulcrum about which the base plate 4 rotates, and is positioned obliquely below the support rod pivot 421. With this structure, when the base plate 4 is raised, the caster base 30 is pushed downward with respect to the bogie frame 1 because the support rod pivotal part 421 is pushed downward with the axial projection pivotal part 422 as a fulcrum. In addition, the axial projection 51 and the axial projection pivot 42
The installation location of 2 may have a structure in which the axial projection 251 opposite to the above is fixed to the rotary connection plate 42 and the axial projection pivotal support 422 is fixed to the shelf frame 5b.

The shape of the shelf frame 5b is substantially rectangular, and the vertical member 501 on the nesting side avoids overlapping with the base plate height adjusting plate 49 of the adjacent stock cart at the time of nesting, and wastes space. A concave portion 502 and a concave portion 503 for eliminating are formed.

In the case of using the stock cart 10 of the embodiment constructed as described above, first, the shaft-like projections 51, 5 fixed below the shelf frame 5b are used.
The base plate 4 that rotates about 1 is laid down on the frame 1 (FIGS. 2 to 4 and 7). The base plate 4 is a base plate height adjustment plate 49
Abuts on the fixed caster support plate 7 to be in a stable state parallel to the ground. The rear end of the base plate 4 is in contact with the upper surface of the rear end member 101b and the rear surface 45 of the base plate.

The stock cart 10 thus formed
Is a six-wheeled vehicle as shown in FIG. 2 and FIG. 7, and can perform a seesaw-type movement around the center fixed caster 3 to freely change directions. The base plate 4 may be simply placed on the trolley frame 1 or may be fixed with a fixture. Also, the contact surface X of the free caster 2 and the fixed caster 3
−X may be the same plane, or the ground plane of the fixed caster 3 may be lower than the ground plane of the free caster 2.

Next, in order to nest it, the base plate 4 is pivoted upward to be raised, and is fixed to a side frame 5b formed near the rear, for example, with a chain or a string, although not shown in the figure.

According to the stock cart 10 of the present embodiment, as shown in FIGS. 3 to 8, the rotary connecting plate 42 connected to the base plate 4 includes a support rod pivot 421 and an axial projection pivot. 4
22, and the shaft-shaped projection pivot 422 is supported by the support rod pivot 4
The shelf frame 5b is lifted upward by raising the base plate 4 because the base plate 4 is positioned obliquely below the base plate 21 and is used as the pivot of the base plate 4. That is, the integrally fixed member of the fixed caster 3, the shelf frame 5b and the bogie frame 1 is lifted by the length of H as compared with the state in use, so that the lower end of the fixed caster 3, as shown in FIG. The formed surface is located above the surface formed at the lower end of the free caster 2. In this case, the frame formed by the shelf frames 5a and 5b and the bogie frame is slightly inclined to the right (front end). In such a nesting cart, since the fixed casters 3 become inoperable and run on only four-wheel free casters, they can be moved in the free direction and nesting in the short direction is possible.

The nesting will be described with reference to FIGS. FIG. 9 is a plan view showing a nesting state when the bogie frame has an H-shape, and FIG. 10 is a plan view showing a state where effective nesting cannot be performed.
In FIG. 9, when the bogie frame has an H-shape, the nesting restricting projection 70 regulates the nesting direction, and gives a suggestion of a correct direction to the worker. That is, if the nesting is performed from the side where the nesting regulating protrusion 70 is located, it is possible to effectively use the space without creating useless space. Even if an attempt is made to nest from the opposite side where the nesting regulating protrusion 70 is located, the connecting member 20 between the nesting regulating protrusion 70 and the bogie frame is used.
2 collides and no effective nesting is performed. On the other hand, as shown in FIG.
Is not provided, the operator is confused by the determination of the nesting direction. For example, even if the operator tries to nest the stock cart group 90 and the stock cart group 91, the front end members 101a and the rear end members 101b of the bogie frame 1 come into contact with each other. Creates wasted space. When the bogie frame 1 is Z-shaped or inverted Z-shaped, the nesting direction is relatively easily determined. Therefore, the nesting restricting projection 70 is particularly effective when the bogie frame 1 has an H-shape.

In the present invention, the function or structure of the rotating portion of the base plate is such that the base plate is rotated upward to lift the integral portion of the fixed caster and the bogie frame (as viewed from the universal caster portion, The method is not limited to the above method as long as it has a (lowering effect), and can take various forms.

Next, a brake operation method will be described with reference to FIGS. FIG. 11 is a front view of a main part of the main part, partially illustrating the brake means and the brake operating means. FIG. 12 is a perspective view in which a part is omitted or broken. In the figure, the fixed caster 3 includes a brake means 6 for locking the rotation of a wheel 3B rotatably supported by a bracket 3A for fixing the caster 3 to the bogie frame 1,
The brake means 6 is operated by a pair of brake operation means 50 provided at the center of the upper surface of the front end member 101a at one end of the bogie frame 1 in the longitudinal direction. Also, the brake means 6 and each brake operation means 50
The sections are connected by an operating force transmitting member 8 that transmits the operating force of the wheel operating and unlocking of the brake operating means 50 to the brake means 6. The diameter of the wheel 3B of the fixed caster 3 is larger than the diameter of the wheel of the free caster 2, so that the bogie 10 can perform a seesaw movement with respect to the floor with the fixed caster as a fulcrum, and the direction of the bogie 10 can be changed. Easy going.

The brake means 6 includes a shaft 6A on the bracket 3A.
One end of the pressing tooth member 6B is pivotally supported so as to be separated from and attached to the outer peripheral surface of a gear 3C fixed to the wheel 3B, and the other end is fixed to both ends. A shaft 6 </ b> C arranged in a spanning state is connected between the casters 3. The brake operating means 50 includes a bracket plate 7A fixed to the front end member 101a of the bogie frame 1;
An operation lever 7C supported on a bracket plate 7A so as to be vertically swingable by a shaft 7B, a torsion spring (not shown) mounted on the shaft 7B and for urging the operation lever 7C in the direction of arrow C in FIG. A lock lever 7F swingably supported by a bracket 7A by a shaft 7E parallel to the shaft 7B of the operation lever 7C, and a torsion spring mounted on the shaft 7E to bias the lock lever 7F in the direction of arrow D in FIG. (Omitted in the drawing), the operation lever 7C is rotated in the direction opposite to the arrow C in FIG. 11, and the shaft pin 7H provided on the operation lever 7C is formed in the notch 7F1 formed in the lock lever 7F. , The operation lever 7C is held at the wheel lock position, and the lock lever 7
F is rotated in the direction opposite to the arrow D in FIG.
By removing 1 from the shaft pin 7H, the wheel lock of the operation lever 7C is released. The operation lever 7C and the lock lever 7F constitute an operation member in the present invention.

The operating force transmitting member 8 is composed of a flexible wire 8A disposed between the brake means 6 and the brake operating means 50 through a gap in the bogie frame 1, and one end of a core wire of the flexible wire 8A is connected to a crankshaft 6C of the brake means 6. The other end is connected to the brake operating means 50
Of the control lever 7C. Further, the connection of the flexible wire 8A to the brake means 6 is passed vertically to the crankshaft 6C via a pulley 8B.

When locking the fixed casters 3 in the stock cart configured as described above, FIG.
As shown in FIG. 1, the swinging distal end of the operation lever 7C is pressed by the foot to rotate the operation lever 7C in the direction opposite to the arrow C in FIG. As the shaft pin 7H rotates the lock lever 7F in the direction opposite to the direction of the arrow D and the operation lever 7C rotates to the position shown in FIG. 11, the shaft pin 7H moves to the notch 7F1 of the lock lever 7F. Engages. Thus, the operation lever 7C is held at the wheel lock position. When the operation lever 7C is turned to the position shown in FIG. 11, the core wire of the flexible wire 8A moves or loosens toward the brake operation means 50 side.
The gear 3C fixed to the wheel 3B of the fixed caster 3 by rotating the pressing tooth member 6B connected via C with its own weight or spring bias in the direction of the arrow in FIG.
To lock the wheel 3B. As a result, the stock cart 10 is kept stopped. The brake operating means 50 in the wheel locked state shown in FIG.
When the lock lever 7F is pressed by the foot, the shaft pin 7H is disengaged from the notch 7A of the lock lever 7F, and the operation lever 7C returns to the unlocked state.

As described above, according to the embodiment of the present invention, since the wheels 3B of the fixed casters 3 provided at the intermediate portion in the longitudinal direction of the stock cart 10 are locked, the swivel casters 2 can be used even on an inclined floor or the like. Regardless of the stock cart 1
0 can be stopped reliably, a stable stop state can be maintained, and there is no risk of load collapse.
Further, since the brake operating means 50 is constituted by the operating lever 7C and the lock lever 7F for locking and unlocking the wheel, it is possible to prevent the fixed caster from being locked or unlocked inadvertently. it can.

As another embodiment of the present invention, a plurality of the brake means may be provided, and each of the brake means may be separately mounted on an arbitrary position of the bogie frame. This makes it possible to easily lock and release the wheels of the fixed caster by operating the brake operating means close to the worker. Further, the transmission member may be a rod member other than the flexible wire connecting the operation member and the brake means.

[0028]

As is apparent from the above description, according to the present invention, by operating the brake operating means in the wheel locking direction, the brake means locks the wheels of the fixed casters. This also makes it possible to stop and hold the cart stably. When a stock cart is used, if the base plate is tilted and the luggage is loaded and moved, a seesaw-type movement around the fixed caster can be performed, and the direction can be freely changed. In addition, when storing, that is, when nesting, if the base plate is raised, the fixed casters become inoperable, so only the four-wheel free casters run, and can move in the free direction, and nesting in the short direction can be performed. It becomes possible. In addition, at the time of nesting, the direction of the nesting is not mistaken, the work efficiency is improved, and the space can be effectively used without wasting space.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a base plate of a stock cart according to the present invention is raised.

FIG. 2 is a perspective view showing a state in which a base plate of the stock cart of the present invention is turned down.

FIG. 3 is an enlarged view of a rear end portion of FIG. 2;

FIG. 4 is a side view of FIG. 3, and a part thereof is shown by a cross section AA in FIG. 3;

FIG. 5 is an enlarged view of a rear end portion of FIG. 1;

FIG. 6 is a side view of FIG. 5, and a part is shown by a BB cross section of FIG. 5;

FIG. 7 is a side view in which a lower part of FIG. 2 is partially omitted.

FIG. 8 is a side view in which a part of a lower portion in FIG. 1 is omitted.

FIG. 9 is a plan view showing a nesting state when the bogie frame has an H shape.

FIG. 10 is a plan view showing a state where effective nesting cannot be performed.

FIG. 11 is a partially broken plan view illustrating a brake operation.

FIG. 12 is an exploded perspective view of a part of a bogie frame for explaining a brake means.

FIG. 13 is a view showing a nesting state of a conventional stock cart.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dolly frame 2, 120 Swivel caster 3, 130 Fixed conversion caster 4 Base plate 5a, 5b Shelf frame 6 Brake means 7 Fixed caster support plate 8 Operating force transmission member 10 Stock cart 30 Caster base 42 Rotating connection plate 50 Brake operation part 70 Nesting regulating protrusion 81 Support rod 421 Support rod pivot 422 Axial projection pivot

Claims (9)

[Claims] 1. A bogie frame having a nesting structure, a swivel caster mounted on a bottom surface near four corners of the bogie frame, a fixed caster mounted on a substantially middle bottom surface of the bogie frame, and A base plate rotatably attached to a portion near the end, a brake means for locking the rotation of the wheel of the fixed caster, and a brake for operating the brake means in the wheel locking direction and the unlocking direction of the fixed caster Operating means, the base plate is rotated upward to raise the surface formed by the lower end of the fixed caster above the surface formed by the lower end of the free caster, and A stock cart characterized by performing nesting by actuation of casters. 2. The stock cart according to claim 1, wherein said brake means is swingably supported by a bracket of said fixed caster and comprises a pressing member adjacent to a wheel outer peripheral surface of said fixed caster. 3. The brake device according to claim 1, wherein the brake means is supported by a bracket of the fixed caster so as to be swingable, and includes a pressing tooth member adjacent to an outer peripheral surface of a gear mounted on a wheel of the fixed caster. Stock cart. 4. The brake operating means includes: an operating member swingably mounted on the bogie frame; and an operating force when operating the operating member in a wheel lock direction and a lock release direction of the fixed caster. 4. A transmission member for transmitting to a brake means.
Stock cart described in section. 5. The operating member comprises an operating lever for operating the brake means in a wheel locking direction, and a lock lever for holding the operating lever at a wheel locking position and releasing the operating lever from locking a wheel. The stock cart according to claim 4. 6. The stock cart according to claim 1, wherein the bogie frame is formed in a Z shape, an inverted Z shape, or an H shape. 7. The stock cart according to claim 1, further comprising a shelf frame detachably or fixedly attached to at least a rear end portion of said bogie frame. 8. A shelf frame shape of a shelf frame stored by rotating the base plate upward has a concave portion which does not overlap with a base plate of another adjacent stock cart during nesting. The stock cart according to claim 7. 9. The stock cart according to claim 8, wherein a nesting restricting projection is provided at an upper end of the rear end member of the bogie frame on the side where the concave portion is formed and at an upper end of the upper end of the front end member of the bogie frame on a diagonal line. .