JP2579101Y2 - Cart brake equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cart braking device. That is, the present invention relates to a brake device in a cart having a box shape and provided with casters, in which articles are stored and provided for various services.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional brake device for a cart, wherein FIG. 1A is a front view, and FIG. As shown in FIG.
For casters 1 attached below the floor of the cart body,
A vertically long brake shoe 2 for pressing and separating to brake and release the brake, a spring 3, a lever 4, an adjusting screw 5, an arm 6, a connecting rod 7, and other urging means and transmission means are provided. One end of the lever 4 that can swing up and down abuts on the upper end of the brake shoe 2, and the other end of the lever 4 can abut on the upper end of the adjusting screw 5 provided on the arm 6. The arm 6 is also swingable up and down, and is supported by a shaft 8 and connected to a brake petal 10 attached to a release petal 9 via a connecting rod 7 of a vertically arranged toggle link. The brake shoe 2 and its urging means and transmission means are all provided on the floor 1 of the cart body.
1, the brake petal 10 and the release petal 9 were arranged near the end of the cart body. When the brake petal 10 is depressed, the adjustment screw 5 side of the arm 6 swings upward through the connecting rod 7, swings the other end of the lever 4 upward, and lowers one end of the lever 4. The brake shoe 2 is moved downward by swinging in the direction, so that the brake shoe 2 is pressed against the caster 1 to perform braking. The brake release has been performed by various methods.
Is pressed and the link A is performed, so that the operation is performed in a manner substantially opposite to that described above.

[0003]

However, the following problems have been pointed out in such a conventional example. First, in this conventional brake device, as shown in FIG. 5A, a brake petal 10 and a release petal 9 are used.
The transmission means such as the connecting rod 7, the arm 6, the adjusting screw 5, etc., and the urging means such as the spring 3, the lever 4, etc. are located above the height position of. Are all designed to move and swing up and down, requiring a space corresponding to the operation stroke. Therefore, a large vertical space clearance is required below the floor 11 of the cart body for such transmission means and biasing means, and in addition to this, a stepping allowance of the brake petal 10 and the release petal 9 is required. Since it was necessary to consider the vertical space and clearance, the height of the floor 11 of the cart body would be increased,
The problem was pointed out. That is, in the conventional cart brake device, there is a disadvantage that the vertical space clearance between the floor surface 11 of the cart main body and the running surface becomes large. For example, the caster 1 having a small diameter is used. Some people pointed out that they couldn't, and there was a longing for a low-floor cart.

Secondly, the conventional cart braking device requires a biasing means and a transmission means such as a brake shoe 2, a spring 3, a lever 4, an adjusting screw 5, an arm 6, a connecting rod 7, and the like. In addition, the number of constituent members is very large, and their structures are extremely complicated. Therefore, high precision is required also for processing, positioning, assembling, mounting, adjusting and the like. Therefore, problems were pointed out in terms of manufacturing costs and man-hours.

The present invention has been made in view of such a situation, and has been made to solve the above-mentioned problems of the prior art, and comprises a bar which moves in the axial direction, a link member and a joint which rotates horizontally, and a shaft. By providing a rod that rotates about the center, a rod notch having a semicircular cross section, and a brake member that moves slightly up and down, first, the vertical space between the floor surface and the running surface of the cart body is reduced. Secondly, it is an object of the present invention to propose a cart brake device which has a small clearance and has a simple structure and is easy to process, align, assemble, mount, adjust and the like.

[0006]

The technical means of the present invention for achieving this object is as follows. That is, the brake device of this cart has a substantially L-shape, the center of which is attached near the end of the cart body by a horizontal shaft, one end of which is a free end and which can be depressed, A base end is connected to the end side, a bar that can move along the axial direction below the floor of the cart body, one end is pivotally connected to the tip of the bar, and the center of the cart body is A link member pivotally mounted below the floor surface and rotatable horizontally, a joint having one end pivotally connected to an end of the link member, and the other end of the joint pivotally connected to the floor of the cart body with a holder. And a rod held below the surface so as to be rotatable about its axis.

Furthermore, a brake release position in which a semicircular cross section is formed at the end of the rod, and a flat portion faces a lower brake member, and a bent portion is pressed against the brake member. Position, a rod notch that can be rotated and displaced, a caster attached below the floor of the cart body, interposed between the rod notch and the caster, and when the rod notch is in the brake release position, Taking the brake release position which is opposed to the lower caster with an interval, and when the rod notch is in the brake position, the upper rod cutout presses against the lower caster side. And a brake member that moves and assumes a brake position pressed against the caster.

[0008]

The present invention is constituted by such means, and operates as follows. In this cart braking device, when the brake petal is depressed, the bar moves below the floor of the cart body along the axial direction of the cart, whereby the link member rotates horizontally. Then, the rod pivots around the axis via the joint, and the rod notch pivotally moves from the brake release position to the brake position. Since the rod notch is pressed against the brake member, the brake member takes a brake position pressed against the caster from the brake release position, and the brake is performed. Therefore, first, in this brake device, each component is arranged substantially below the floor of the cart body, and the operation of each component is performed almost horizontally instead of vertically.
Eliminates the need for large vertical clearances below the cart floor. Second, this braking device
The structure is simple, for example, the number of constituent members is relatively small and their shapes are simple. Therefore, processing, positioning, assembly, mounting, adjustment, and the like are easy, and particularly high precision is not required.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. FIG. 1 is a bottom view of an embodiment of the present invention, and FIG.
2 (2) is a side view of the release petal 9 etc., and FIG. 2 (3) is a side view of the rod 14, the rod notch 15, the brake member 16, the caster 1, etc. FIG. 3 (1) is a perspective view of the joint 13 and the rod 14, etc. FIG. 3 (2) is a side view of the rod notch 15, the brake member 16, the caster 1, etc.
FIG. 3 (3) is an exploded perspective view of these. FIG. 4 is a schematic front view of the rod notch 15, the brake member 16, the caster 1, and the like. FIG. 4 (1) shows the brake release state in the embodiment, and FIG. FIG. 4 (3) shows the brake state in this embodiment, and the brake release state in another application example.

First, the cart is provided with a caster 1 having a box shape, for example, in which articles are stored and provided for various services.
For example, when crew members provide services such as meals and drinks to passengers in aircraft and in vehicles such as Shinkansen,
used. The brake device of this cart includes a brake petal 10, a bar 12, and a link member 1 described below.
7, joint 13, rod 14, rod notch 15,
In addition to the brake member 16, a release petal 9, a release bar 18, and the like are provided. Hereinafter, these will be described in detail.

First, as shown in FIGS. 1 and 2 (1), the brake petal 10 has a substantially L-shape, and the center is formed by a horizontal shaft 19 near the end of the floor 11 of the cart body. It is attached, and one end side 20 is a free end and can be pressed. That is, the brake petal 10 is provided near the end of the floor surface 11 of the cart body together with a release petal 9 described later, and is pivotally mounted on a shaft 19 held below the floor surface 11 so as to be rotatable up and down. When one end 20 protruding from under the floor 11 is depressed by a foot, the state is changed from a solid line display to an imaginary line display in FIG. 2A. .

Next, the bar 12 is shown in FIG. 1 and FIG.
As shown in the figure, the brake pedal 10 is connected to the other end 21 of the brake petal 10 and is movable along the axial direction below the floor 11 of the cart body. That is, bar 12
Is provided with a connection elongated hole 22 at the base end along the axial direction, and a pin 23 fixed to the other end 21 of the brake petal 10 is provided in the connection elongated hole 22 along the axial direction of the bar 12. The bar 12 and the brake petal 10 are connected so as to be movably fitted. And bar 12
The cart body is arranged back and forth below the floor 11 and is movable between the brake petal 10 and a link member 17 described below along the axial direction of the cart and back and forth and parallel to the floor 11.

As shown in FIGS. 1 and 2A, the link member 17 has one end pivotally connected to the tip of the bar 12 and a vertical pin 24 at the center of the floor 1 of the cart body.
1 and is rotatable horizontally. That is, the link member 17 is formed in a rectangular flat plate shape and is located, for example, near the center below the floor surface 11, the center is pivotally connected with the pin 24, and reciprocates horizontally along the floor surface 11 at an angle of, for example, about 45 degrees. 1 (see the solid line and imaginary line in FIG. 1), and the end of the bar 12 is pivotally attached to one end by a pin 25.

Next, as shown in FIGS. 1 and 3 (1), the joint 13 has both ends pivotally connected between the link member 17 and a rod 14 described below. That is, in the illustrated example, the joint 13 is
Two pieces are arranged on the lower left and right sides, and one end is pivotally connected to one end and the other end of the link member 17 by a pin 26, and the other end is respectively connected to the left and right below the floor surface 11 by, for example, ball connection. , Is pivotally attached to one end of a rod 14 disposed at the center. The ball connection in the illustrated example is such that a spherical portion 28 protrudingly formed at one end on the rod 14 side is displaceably fitted into a substantially spherical concave portion 27 formed on the other end on the joint 13 side. Of course, instead of such a ball connection, a pin or the like may be used to pivotally connect the two. Thus, the two joints 13 are horizontally rotatable along the floor 11 between the link member 17 and the two rods 14.

As shown in FIGS. 1 and 2 (3), FIG. 3 (1), and FIG. 3 (2), the rod 14 is held by the holder 29 on the floor 11 of the cart body. Below, it is held rotatably about its axis. That is, the rod 14
In the illustrated example, two are arranged on the left and right below the floor surface 11, and each can be rotated around its axis at an angle of, for example, 45 ° to 90 ° by holders 29 which are front and rear bearings, and can also be turned forward and backward along the axial direction. It is held immovable. Also, both rods 1
Reference numeral 4 is arranged below the floor 11 of the cart body and parallel to the bar 12 described above.

Next, as shown in FIGS. 1 and 2 (3), FIG. 3 (1), FIG. 3 (2) and FIG. At the other end, a brake is formed in a semicircular cross section, and a brake release position in which the flat portion 30 is opposed to the brake member 16 described below, and a brake in which the curved portion 31 is pressed against the brake member 16. The position can be turned. That is, the rod notches 15 are located on the corners below the floor 11 of the cart main body, in the illustrated example, on the casters 1 which are wheels arranged near the left and right of the brake petal 10 and the release petal 9, respectively, as shown in FIG. 3) FIG. 3, FIG. 3 (2), FIG. 4 (1)
As shown in the drawings, the brake release position in which the flat portion 30 faces the brake member 16 side, and the end of the curved portion 31 faces the brake member 16 side, as shown in FIG. The rod 14 can be rotated and displaced at an angle between 45 degrees and 90 degrees, for example, with the rotation of the rod 14 with respect to the brake device to be brought into contact with or pressed against the brake device.

The brake member 16 is shown in FIG. 2 (3), FIG. 3 (2), FIG. 3 (3), FIG. 4 (1), FIG.
(2) As shown in Fig. 2 and the like, when the rod notch 15 is located between the rod notch 15 and the caster 1 and the rod notch 15 is at the brake release position as described above, there is an interval with respect to the lower caster 1. When the rod notch 15 is at the brake position as described above, the rod notch 15 moves to the lower caster 1 side by pressure contact of the upper rod notch 15 and presses against the caster 1. The brake position is taken. That is, the brake member 16 is mounted between the rod notch 15 and the caster 1 so as to be interposed therebetween. In the illustrated example, a long flat plate made of rubber or the like having excellent frictional force is bent up and down. The upper part 32 is attached and fixed with bolts or the like below the floor surface 11 of the cart body, and the lower part 33 is connected to the rod notch 15 and the caster 1.
It is located between them. In the illustrated example, the caster 1
The upper part 32 of the brake member 16 is fixed to the floor 11 together with the mounting part 34 for the floor 11. Then, such a brake member 16 is connected to the rod notch 15
Following the rotational displacement of the caster 1, the brake can be displaced between a brake release position separated from the caster 1 and a brake position pressed against the caster 1.

Next, the release petal 9 is shown in FIGS.
As shown in FIG. 2B, the cart is substantially L-shaped, the center of which is attached near the end of the floor surface 11 of the cart body by a horizontal shaft 35, and one end side 36 is a free end and can be pushed down. Has become. That is, the release petal 9 is replaced by the brake petal 10
And has a structure similar to that of the brake petal 10, and is pivotally mounted on a shaft 35 horizontally held below the floor 11 so as to be able to rotate up and down, and projects laterally from below the floor 11 When the one end 36 is depressed with a foot, it is pushed down from a solid line display state to an imaginary line display state in FIG. 2 (2). The shaft 35
Is formed by extending the shaft 19 described above, for example.

Further, the release bar 18 is provided as shown in FIGS.
As shown in FIG. 2B, the base end is connected to the other end 37 of the release petal 9 and the floor 1 of the cart body is
1 is movable along the axial direction. That is, the release bar 18 is provided in parallel with the above-described bar 12 and the like and has a configuration similar to the bar 12, and has a connection elongated hole 38 at the base end along the axial direction.
8, a pin 39 fixed to the other end 37 of the release petal 9 is fitted and mounted so as to be movable along the axial direction of the release bar 18, thereby connecting the release bar 18 and the release petal 9. Have been. At the same time, the release bar 18 is arranged back and forth below the floor 11 of the cart body, and between the release petal 9 and the link member 17 described above.
It is movable back and forth along its axial direction and parallel to the floor surface 11. And the tip of the release bar 18
The bar 12 is pivotally connected to the other end of the link member 17 by a pin 40, and the bar 12 is
5 is pivotally connected to the other end opposite to the one end pivotally connected.

Here, the brake petal 10, the release petal 9, the connecting slot 22, the connecting slot 38 and the like are shown in FIG.
This will be described in more detail with reference to FIG. First, when the brake petal 10 is pressed (from the state of the solid line display in FIG. 2 (1) to the state of the imaginary line display), the connecting slot 22 is located at the left end in the drawing. Pin 2
3 pushes the left end of the connection slot 22 and the bar 12 to the left in the drawing, and the bar 12 moves leftward in the drawing along the axial direction. Then, with this, the link member 17 rotates, (from the state shown by the solid line in FIG. 1,
Joint 1 will rotate to the imaginary line display state)
3, the brake member 16 is displaced from the brake release position to the brake position via the rod 14, the rod notch 15, and the like, whereby the brake on the caster 1 by the brake member 16 is performed. At that time, the release bar 18 moves rightward along the axial direction in the drawing as the link member 17 rotates. Then, on the release petal 9 side, from the state shown in FIG. 2 (2), the connecting elongated hole 38 moves rightward in the drawing, but the pin 39 does not move from the position shown in FIG. Only the relative position to the hole 38 is displaced from the right end to the left end. In this way, even if the brake petal 10 is pressed, the release petal 9 does not rotate and keeps the posture that is not pressed.

When the brake petal 10 is depressed, the other end 21 of the brake petal 10 has a stopper 41 fixed below the floor 11.
(See FIG. 2 (1).) By setting the position as a dead point, it does not rotate any more and does not return to the original undepressed posture. Therefore, the brake state implemented as described above is maintained as it is. Now, when the release petal 9 is pressed from this state (when the state is pressed from the solid line display state in FIG. 2 (2) to the imaginary line display state), as described above, The pin 39 located at the left end is connected to the left end of the connection slot 38 and the release bar 18.
Is pushed leftward in the drawing, and the release bar 18 moves leftward in the drawing. This causes the link member 17 to rotate (because it rotates again from the imaginary line display state in FIG. 1 to the original solid line display state), the joint 1
3, the brake member 16 is displaced from the brake position to the original brake release position via the rod 14, the rod notch 15, and the like, whereby the brake on the caster 1 by the brake member 16 is released.

The rotation of the link member 17 causes the brake pedal 10 to return to the original constant posture from the pressed state via the bar 12 and the like. When the release of the release petal 9 is released, the release petal 9 returns to its original constant posture by the urging force of an interposed spring (not shown) or the like. In FIG. 2B, reference numeral 42 denotes a stopper, which is a stopper 42 for the release petal 9.
Performs a function similar to that of the stopper 41 for the brake petal 10 described above. Further, in FIG. 2 (1) and FIG. 2 (2), 43 and 44 are stoppers, respectively.

As described above, the release petal 9 allows the release bar 18, the link member 17, and the like to move, rotate, and the like only when the brake petal 10 is pressed. Has become. On the other hand, if the release petal 9 is pressed down while the brake petal 10 is in a normal posture in which the brake petal 10 is not pressed down, the pin 39 of the release petal 9 is connected to the connecting elongated hole as shown in FIG. Since the release bar 18 is located at the right end in the drawing of FIG. 38, the release bar 18 is not moved and remains immovable, and the link member 17 and the like are not moved or rotated following the link member 17 or the like. The brake petal 10 and the release petal 9 in the illustrated example realize such an operation easily and easily by being used in combination with the connection elongated hole 22 and the connection elongated hole 38 as described above. In view of the fact that the configuration of the conventional device for realizing the above operation is very complicated, the advantage is great.

The present invention is as described above. Then, it becomes as follows. In this cart brake device, when the free end 20 of the brake petal 10 is pressed down (see FIG. 2 (1)), the connected bar 1
2 moves under the floor 11 of the cart body along the axial direction thereof, and the pivotally connected link member 17 is moved horizontally (from the state of the solid line display to the state of the imaginary line display in FIG. 1). To rotate. Then, the rod 14 pivots about its axis via the joint 13 which is pivotally mounted, and the rod notch 15 having a semicircular cross section is positioned at the braking position (FIG. 3 (see FIG. 4) and FIG. 4 (see FIG. 4)), the curved portion 31 is pivotally displaced to a brake position (see FIG. 4 (2)) where the bent portion 31 is pressed against the brake member 16. And the rod notch 1
5 takes the brake position and presses against the brake member 16, so that the brake member 16 is moved from the brake release position (see FIG. 3 (2) and FIG. 4 (1)) which is separated from the caster 1. 1 and takes a brake position (see FIG. 4 (2)) pressed against the caster 1.
In this way, the rotation of the caster 1 is prevented by the frictional resistance, the brake is applied, and the cart stops. Now, in the cart braking device, the following first and second cases are performed.

First, the vertical space clearance between the cart body floor 11 and the running surface is reduced.
That is, in the cart brake device, the bar 12, the link member 17, the joint 13, the rod 14, the rod notch 15, the brake member, and the like are provided at the same height level as the brake petal 10 and the like under the floor 11 of the cart body. 16 and the like, and furthermore, the bar 12 moves along its axial direction, the link member 17 and the joint 13 rotate horizontally, and the rod 14 and the rod notch 15 also rotate around the axis. And the brake member 16 moves only slightly up and down. As described above, in this brake device, the respective components are arranged substantially below the floor 11 of the cart body, and the operations of the respective components are performed almost in the horizontal direction instead of the vertical direction. The need for a large vertical clearance below the floor 11 is eliminated. That is, in the vertical direction, the brake petals 1
It is only necessary to consider the vertical space / clearance for the stepping amount of 0 or the release petal 9, and the vertical space / clearance below the floor 11 is smaller than that of the above-described conventional example of FIG. About half is good.

Second, the structure is simple, and its alignment, assembly, mounting, adjustment, and the like are easy. That is, the cart brake device includes a predetermined bar 12, a link member 17, a joint 13, a rod 14, and a rod notch 1.
5, the brake member 16 and the like, the number of components is smaller than that of the above-described conventional example, and the configuration is simple, such as the shape is relatively simple. Therefore,
Processing, alignment, assembly, mounting, adjustment, etc. are easy,
There is no particular requirement for these to have high precision.

First, in the illustrated example, such a cart brake device is provided for two casters 1 below the floor surface 11 of the cart main body, and the two casters 1 are braked. However, the present invention is of course not limited to this. For example, the present invention can be applied to four casters 1 provided at four corners so that all the brakes can be performed at the same time. The second
Meanwhile, as shown in FIG. 4 (3), it is also possible to apply the brake device of the present invention by partially utilizing a conventional type. That is, in the cart provided with the conventional brake device shown in FIG. 5 described above, most of the brake device is removed, but the components for one caster can be used as they are. It is. For example, as shown in FIG. 4 (3), a conventional brake shoe 2 or the like (see also FIG. 5) may be used as it is as the brake member 16 of the brake device of the present invention.

[0028]

[Effect of the Invention] The cart brake device according to the present invention is:
As described above, the bar moving in the axial direction, the link member and the joint rotating horizontally, the rod rotating around the shaft, the rod notch having a semicircular cross section, the brake member moving slightly up and down, and the like are provided. The following effects are exhibited by being provided.

First, the vertical space clearance between the cart body floor and the running surface is reduced. Therefore, the height of the floor of the cart body can be reduced, and a low-floor cart can be realized. For example, casters having a small diameter can be used. Secondly, it has a simple structure, is easy to process, align, assemble, attach, adjust, etc., and is excellent in terms of manufacturing cost and man-hour, such as not requiring particularly high precision. As described above, the effects exhibited by the present invention are remarkable and large, for example, the problems existing in this type of conventional example are eliminated.

[Brief description of the drawings]

FIG. 1 is a bottom view showing an embodiment of a cart brake device according to the present invention.

FIGS. 2A and 2B show members of the embodiment, wherein FIG. 1A is a side view of a brake petal and a bar, FIG. 2B is a side view of a release petal and the like, and FIG. It is a side view of a notch part, a brake member, a caster, etc.

3A and 3B show respective members of the embodiment, wherein FIG. 3A is a perspective view of a joint and a rod, and FIG.
The side view of the brake member, the caster and the like, and FIG.

FIG. 4 is a schematic front view of the rod notch, the brake member, the casters, and the like. FIG. 1A shows a brake release state in the embodiment, and FIG. 4B shows a brake state in the embodiment. (3) Drawing shows the brake release state in other application examples, respectively.

FIG. 5 shows a cart braking device according to a conventional example,
(1) is a front view, and (2) is a side view conceptual diagram.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Caster 10 Brake petal 11 Floor surface 12 Bar 13 Joint 14 Rod 15 Rod cutout part 16 Brake member 17 Link member 19 Axis 20 One end 21 The other end 24 Pin 29 Holder 30 Flat part 31 Curved part

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B62B 5/04

Claims (1)

(57) [Scope of request for utility model registration] 1. A brake petal having a substantially L-shape and having a center mounted near the end of a cart body by a horizontal shaft, one end of which is a free end and which can be pressed down, and a base provided on the other end of the brake petal. A bar whose ends are connected and can move along the axial direction below the floor of the cart body, one end of which is pivotally connected to the tip of the bar, and the center of which is a vertical pin below the floor of the cart body. A link member pivotally mounted and rotatable horizontally, a joint having one end pivotally attached to an end of the link member, and the other end of the joint pivotally attached, and the holder is provided below the cart body floor surface. A rod rotatably held about an axis, a notch formed in a semicircular cross section at an end of the rod, and a brake release position in which a plane portion is opposed to a lower brake member; Rotationally displaceable to the brake position pressed against the brake member A rod cutout, a caster attached below the floor of the cart body, and a caster interposed between the rod cutout and the caster. When the rod cutout is in the brake release position, the caster is spaced from the lower caster. When the rod notch is in the brake position, the rod is moved to the lower caster side by pressure contact of the upper rod notch, and is pressed against the caster when the rod notch is in the brake position. And a brake member for setting a braking position.