JPH0661649U - Cart brake equipment - Google Patents

Abstract

(57) [Summary] [Purpose] First, a low-floor type cart with a small vertical clearance between the floor surface of the cart body and the running surface is realized, and secondly, the configuration is simple, We propose a cart braking system that is easy to align, assemble, install, and adjust. [Structure] This brake device includes a brake petal 10
And a bar 12 interposed between the brake petal 10 and the link member 17 and movable in the axial direction under the floor surface 11 of the cart body, and a link member pivotally mounted below the floor surface 11 and rotatable horizontally. 17, a joint 13 interposed between the link member 17 and the rod 14, a rod 14 rotatably held under the floor 11 about its axis, and a semicircular cross section at the end of the rod 14. A rod notch 15 which is formed in a notch at the brake release position and is rotatable to the brake position, and a brake member 16 which follows the rod notch 15 and takes the brake release position and the brake position with respect to the caster 1. It becomes.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a braking device for a cart. That is, the present invention relates to a brake device in a cart that has, for example, a box-shaped caster, in which articles are stored and used for various services.

[0002]

[Prior art]

 FIG. 5 shows a conventional brake device for a cart. (1) is a front view and (2) is a side view. As shown in the same figure, the conventional brake device has a vertically extending brake shoe 2 for releasing the brake and the brake by pressing and separating the caster 1 attached below the floor of the cart body and the spring. It was equipped with 3, lever 4, adjust screw 5, arm 6, connecting rod 7, and other biasing and transmitting means. One end of the lever 4 which can be swung 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 an adjusting screw 5 attached to the arm 6. The arm 6 is also swingable up and down, and is supported by a shaft 8 through a vertically extending toggle link connecting rod 7 and is connected to a release petal 9 and a brake petal 10 that is also provided. . The brake shoe 2 and its urging means, transmission means, etc. are all arranged under the floor 11 of the cart body, and the brake petals 10 and release petals 9 are arranged near the ends of the cart body. It had been. When the brake petal 10 is pushed down, the adjusting screw 5 side of the arm 6 swings upward through the connecting rod 7, and the other end of the lever 4 swings upward so that one end of the lever 4 moves downward. In this case, the brake shoe 2 was swung in the direction to move the brake shoe 2 downward so that the caster 1 was brought into pressure contact with the brake shoe 2 for braking. Although the brakes are released by various methods, for example, the release petal 9 is pressed and the link A is used to perform an operation almost opposite to the above.

[0003]

[Problems to be Solved by the Invention] Incidentally, in such a conventional example, the following problems have been pointed out. First of all, in this conventional braking device, as shown in FIG. 5 (1), the connecting rod 7, the arm 6, and the adjusting screw are arranged above the height positions of the brake petal 10 and the release petal 9. 5, transmission means such as 5 and urging means such as the spring 3 and the lever 4 are located, and all of these transmission means and urging means are movable and swinging in the vertical direction. It required a space commensurate with the operation stroke. Therefore, due to such transmission means and biasing means, a large vertical space clearance is required under the floor surface 11 of the cart main body. In addition to this, the brake petal 10 and the release petal 9 are provided with a stepping allowance. It has been pointed out that the height of the floor surface 11 of the cart body becomes high because it is necessary to consider the vertical space and clearance. That is, in the conventional cart braking device, there is a drawback that the vertical space and clearance between the floor surface 11 of the cart body and the traveling surface become large. Due to some indications that it could not be used, a low-floor cart was desired.

Secondly, the conventional cart braking device requires the urging means and transmission means such as the brake shoe 2, the spring 3, the lever 4, the adjusting screw 5, the arm 6, and the connecting rod 7. However, the number of constituent members is very large, and the structure of each is also extremely complicated. Therefore, high precision is required for processing, positioning, assembling, mounting, and adjusting them. Therefore, problems were pointed out in terms of manufacturing cost and man-hours.

In view of such circumstances, the present invention has been made to solve the problems of the above-described conventional example, and includes a bar that moves in the axial direction, a link member and a joint that rotate horizontally, and a shaft. First, by providing a rod that rotates in the center, a rod notch with a semicircular cross section, and a brake member that moves slightly up and down, firstly, there is a vertical space between the floor surface of the cart body and the running surface. Secondly, it is an object of the present invention to propose a braking device for a cart, which has a small clearance and has a simple structure and is easy to process, align, assemble, install and adjust.

[0006]

[Means for Solving the Problems]

 The technical means of the present invention for achieving this object are as follows. That is, the brake device of this cart has a substantially L-shape, the center of which is attached to the end of the cart body by a horizontal shaft, and the brake petal that can be pressed down with one end being a free end and the brake petal. The base end is connected to the other end, the bar is movable along the axial direction under the floor of the cart body, and one end is pivotally attached to the tip of the bar, and the center of the cart is a vertical pin. A link member pivotally mounted below the floor surface of the link member and capable of rotating 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 a cart by a holder. And a rod rotatably held about its axis below the floor of the main body.

Further, a cutout is formed in a semicircular cross section at the end of the rod, and a flat portion is located at a brake release position opposed to a lower brake member, and a curved portion is pressed against the brake member. When the rod notch that can be rotationally displaced at the brake position, the caster attached below the floor of the cart body, and the rod notch that is interposed between the caster and the rod notch is at the brake release position Takes the brake release position, which is opposed to the lower caster with a gap, and when the rod notch is in the brake position, presses the upper notch to lower the rod. And a brake member that moves to the caster side and takes a brake position in pressure contact with the caster.

[0008]

[Action]

 Since the present invention comprises such means, it operates as follows. In this cart braking device, when the brake petal is pressed, the bar moves below the floor of the cart body along its axial direction, and the link member pivots horizontally. Then, the rod is rotated about its axis through the joint, and the rod cutout is rotationally displaced from the brake release position to the brake position. Then, since the rod notch portion is pressed against the brake member, the brake member is brought from the brake release position to the brake position where it is pressed against the caster, and braking is performed. Now, firstly, in this brake device, each component is arranged substantially along the floor of the cart body, and the action of each component is performed in the horizontal direction, not in the vertical direction. , It eliminates the need for a large vertical clearance below the floor of the cart. Secondly, this brake device has a simple structure such that the number of constituent members is relatively small and the shapes thereof are simple. Therefore, it is easy to process, align, assemble, install, and adjust, and high precision is not required.

[0009]

【Example】

 The present invention will be described in detail below based on the embodiments shown in the drawings. 1 is a bottom view of an embodiment of the present invention. FIG. 2 (1) is a side view of the brake petal 10, bar 12 and the like, and FIG. 2 (2) is a release petal 9 and the like. The side view and FIG. 2 (3) are side views of the rod 14, the rod notch 15, the brake member 16, the caster 1, and the like. 3 (1) is a perspective view of the joint 13, 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) FIG. 3 is an exploded perspective view of these. Further, FIG. 4 is a schematic front view of the rod notch portion 15, the brake member 16, the caster 1 and the like. FIG. 4 (1) shows the brake release state in the same embodiment as shown in FIG. 4 (2). FIG. 4 (3) shows the brake state in the same embodiment, and the brake release state in another application example.

First, the cart has, for example, a box shape and is provided with casters 1, in which articles are stored and used for various services. It is used when carrying out services. The brake device for this cart is provided with a brake petal 10, a bar 12, a link member 17, a joint 13, a rod 14, a rod notch 15, a brake member 16, a release petal 9, and a release bar 18, which will be described below. And so on. These will be described in detail below.

First, as shown in FIG. 1 and FIG. 2 (1), the brake petal 10 has a substantially L-shape, and the center of the brake petal 10 is a horizontal shaft 19 near the end of the floor surface 11 of the cart body. It is attached, and one end side 20 becomes 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 main body together with the release petal 9 which will be described later, and is pivotally movably pivoted up and down by a shaft 19 which is horizontally held below the floor surface 11. Therefore, by pushing the one end side 20 protruding from the bottom of the floor surface 11 with the foot, the state shown in the solid line in FIG. 2 (1) is changed to the state shown in the imaginary line. ing.

Next, the bar 12 is connected to the other end 21 of such a brake petal 10 as shown in FIG. 1 and FIG. It is possible to move along the axial direction. That is, the bar 12 has a connecting elongated hole 22 along the axial direction at the base end, and a pin 23 fixed to the other end 21 of the brake petal 10 is provided in the connecting elongated hole 22. The bar 12 and the brake petal 10 are connected to each other by being fitted and attached so as to be movable along the direction. The bar 12 is disposed below the floor surface 11 of the cart body in the front-rear direction, and is moved between the brake petal 10 and the link member 17 described below in the axial direction thereof in the front-rear direction and parallel to the floor surface 11. It is movable.

As shown in FIG. 1 and FIG. 2 (1), the link member 17 has one end pivotally attached to the front end of the bar 12 and the center of which is a vertical pin 24 for the floor surface of the cart body. It is pivoted under 11 and can be rotated horizontally. That is, the link member 17 has a rectangular flat plate shape and is located under the floor surface 11, for example, in the vicinity of the center, and the center is pivotally attached by a pin 24 and horizontally along the floor surface 11 at an angle of, for example, about 45 degrees. It can be reciprocally rotated (see the state shown by a solid line and the state shown by an imaginary line in FIG. 1), and the tip of the bar 12 is pivotally attached to one end by a pin 25.

Next, as shown in FIGS. 1 and 3 (1), both ends of the joint 13 are pivotally attached between the link member 17 and the rod 14 described below. That is, two joints 13 are arranged on the left and right below the floor 11 in the illustrated example, and one end of each joint 13 is pivotally attached to one end and the other end of the link member 17 by a pin 26, and the joints 13 and The ends are pivotally attached to one ends of rods 14 arranged on the left and right below the floor surface 11 by ball connection, for example. In the ball coupling of the illustrated example, a spherical portion 28 protruding from one end on the rod 14 side is displaceably fitted into a substantially spherical recess 27 formed on the other end on the joint 13 side. Of course, instead of such ball connection, a pin or the like may be used to pivotally connect the two. Therefore, the joints 13 can be horizontally rotated along the floor surface 11 between the link member 17 and the rods 14.

As shown in FIG. 1, FIG. 2 (3), FIG. 3 (1), FIG. 3 (2), etc., the rod 14 is mounted on the floor surface 11 of the cart main body by the holder 29. It is held rotatably below its axis. That is, two rods 14 are arranged on the left and right below the floor surface 11 in the illustrated example, and can be rotated around their axes by an angle of, for example, 45 to 90 degrees by holders 29 which are front and rear bearings, respectively. It is held immovable back and forth along the direction. Both rods 14 are arranged below the floor surface 11 of the cart main body and in parallel with the above-mentioned bar 12.

Next, the rod cutout portion 15 is formed on both rods 14 as shown in FIGS. 1, 2 (3), 3 (1), 3 (2), 4 and the like. The other end is formed with a notch having a semicircular cross section, and the flat portion 30 is in a brake release position in which the flat portion 30 is opposed to the brake member 16 described below, and the curved portion 31 is pressed against the brake member 16. It can be pivotally displaced to the brake position. That is, the rod notches 15 are respectively located on the corners below the floor surface 11 of the cart body, on the casters 1 which are wheels arranged near the left and right sides of the brake petal 10 and the release petal 9 in the illustrated example, and are shown in FIG. As shown in FIG. 3 (3), FIG. 3 (2), FIG. 4 (1), etc., the brake release position in which the flat portion 30 faces the brake member 16 side, and FIG. As shown in the figure, the end of the bent portion 31 faces the brake member 16 side and comes into contact with and press-contacts the brake device. As the rod 14 rotates, it rotates at an angle of, for example, 45 to 90 degrees. It can be dynamically displaced.

The brake member 16 is shown in FIG. 2 (3), FIG. 3 (2), FIG. 3 (3), FIG. 4 (1), and FIG. 4 (2). As described above, 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, the brake release position that is opposed to the lower caster 1 at a distance is provided. In addition, when the rod cutout 15 is in the brake position as described above, the upper rod cutout 15 is pressed to move to the lower caster 1 side so that the brake is pressed to the caster 1. Has become. That is, the brake member 16 is attached so as to intervene between the rod notch 15 and the caster 1 described above. 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 to the lower part of the floor 11 of the cart body by bolts or the like, and the lower part 33 is positioned between the rod notch 15 and the caster 1. In the illustrated example, the upper portion 32 of the brake member 16 is attached and fixed to the floor surface 11 together with the attachment portion 34 of the caster 1 to the floor surface 11. Then, such a brake member 16 is displaceable between a brake release position separated from the caster 1 and a break position pressed against the caster 1 by being driven by the rotational displacement of the rod cutout 15. .

Next, as shown in FIG. 1 and FIG. 2 (2), the release petal 9 has a substantially L-shape, and the center is provided with a horizontal shaft 35 near the end of the floor surface 11 of the cart body. It is attached, and one end side 36 becomes a free end and can be pressed. That is, the release petal 9 is provided along with the brake petal 10 and has a structure similar to that of the brake petal 10. The release petal 9 is pivotally attached to a shaft 35 that is horizontally held under the floor 11 so as to be vertically rotatable. The one end side 36 projecting laterally from below the floor surface 11 is depressed by a foot, so that in FIG. 2 (2), the state is displayed from the solid line display state to the imaginary line display state. ing. The shaft 35 is, for example, an extension of the shaft 19 described above.

As shown in FIG. 1 and FIG. 2 (2), the release bar 18 has a base end connected to the other end 37 of the release petal 9 and a floor surface 11 of the cart body. It is possible to move along the axial direction below. That is, the release bar 18 is provided in parallel with the above-described bar 12 and the like and has a structure similar to that of the bar 12, and has a connection elongated hole 38 along the axial direction at the base end thereof. A pin 39 fixed to the other end 37 of the release petal 9 is fitted and attached so as to be movable along the axial direction of the release bar 18, whereby the release bar 18 and the release petal 9 are connected. Along with this, the release bar 18 is disposed below the floor surface 11 of the cart body in the front-rear direction, and moves between the release petal 9 and the above-mentioned link member 17 along the axial direction thereof in the front-rear direction and in parallel to the floor surface 11. It is possible. The tip of the release bar 18 is pivotally attached to the other end of the link member 17 by a pin 40, which is opposite to the one end where the bar 12 is pivotally attached to the link member 17 by the pin 25. Is pivotally attached to the other end of the side.

Here, the brake petal 10, the release petal 9, the connection elongated hole 22, the connection elongated hole 38, and the like will be described in more detail with reference to FIGS. 1 and 2. First, when the brake petal 10 is pressed (from the state shown by the solid line in FIG. 2A to the state shown by the imaginary line), the connecting slot 22 is located at the left end in the drawing. The pin 23 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 its axial direction. Then, along with this, the link member 17 is rotated, so that the joint 13, the rod 14, the rod cutout portion 15 and the like (because the state of the solid line in FIG. 1 is rotated to the state of the imaginary line). The brake member 16 is displaced from the brake release position to the brake position through the brake, so that the brake member 16 brakes the caster 1. At that time, the release bar 18 moves to the right in the drawing along the axial direction with the rotation of the link member 17. Therefore, on the release petal 9 side, from the state shown in FIG. 2 (2), the connecting elongated hole 38 moves to the right in the drawing, but the pin 39 does not move from the position shown in the drawing, but only the connecting position. The relative position with respect to the slot 38 is only 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 is always held in a non-pressed position.

The other end 21 of the pressed brake petal 10 comes into contact with a stopper 41 (see FIG. 2 (1)) fixed below the floor surface 11 so that the position of the brake petal 10 is dead. The point is that it does not rotate any further, and it does not return to the original normal position where it was not pressed. Therefore, the braking state implemented as described above is maintained as it is. When the release petal 9 is pressed from this state (from the state shown by the solid line in (2) of FIG. 2 to the state shown by the imaginary line), in the drawing of the connection elongated hole 38 as described above, The pin 39 located at the left end pushes the left end of the connecting elongated hole 38 and the release bar 18 to the left side in the drawing, and the release bar 18 moves leftward in the drawing. This causes the link member 17 to rotate (because the phantom line display state in FIG. 1 returns to the original solid line display state), the joint 13, the rod 14, the rod cutout portion 15, etc. The brake member 16 is displaced from the brake position to the original brake release position through the, and thus the brake on the caster 1 by the brake member 16 is released.

By such rotation of the link member 17, the brake petal 10 returns to the original normal posture from the pressed state via the bar 12 and the like. When the release petal 9 is released, the release petal 9 returns to its original normal posture by the biasing force of a spring (not shown) interposed. Further, in FIG. 2 (2), a reference numeral 42 denotes a stopper, and the stopper 42 for the release petal 9 fulfills a function similar to that of the stopper 41 for the brake petal 10 described above. Further, in FIGS. 2 (1) and 2 (2), 43 and 44 are also stoppers.

As described above, the release petal 9 can move and rotate the release bar 18, the link member 17, and the like only when the brake petal 10 is pressed. It has become. On the other hand, when the brake petal 10 is not pressed down and the release petal 9 is pressed in the normal posture, the pin 39 of the release petal 9 has the connecting length as shown in FIG. 2 (2). Since the hole 38 is located at the right end in the drawing, the release bar 18 does not move and remains immobile, and the link member 17 and others are not moved or rotated. The brake petal 10 and the release petal 9 in the illustrated example realize such an operation easily and easily by using the brake petal 10 and the release petal 9 in combination with the connecting slot 22, the connecting slot 38, and the like. Considering that the configuration of the conventional device for realizing the above operation is very complicated, its advantage is great.

The present invention has been described above. Then it becomes as follows. In this cart braking device, when one end 20 which is a free end of the brake petal 10 is pressed (see (1) of FIG. 2), the connected bar 12 moves below the floor surface 11 of the cart body. By moving along the axial direction, the link member 17 pivotally attached (from the state shown by the solid line in FIG. 1 to the state shown by the phantom line) horizontally rotates. Therefore, the rod 14 pivots about its axis via the joint 13 pivotally attached, and the rod notch 15 having a semicircular cross section has a flat portion 30 facing the brake member 16. From the position (see (2) in FIG. 3 and (1) in FIG. 4) to the brake position (see (2) in FIG. 4) where the curved portion 31 is in pressure contact with the brake member 16. It makes a dynamic displacement. Then, since the rod notch portion 15 takes the brake position and comes into pressure contact with the brake member 16 in this way, the brake member 16 is separated from the caster 1 at the brake release position ((2) of FIG. 3, FIG. 4 (see (1) in FIG. 4) to the caster 1 side, and takes the brake position (see (2) in FIG. 4) pressed against the caster 1. In this way, the friction resistance prevents the caster 1 from rotating, braking is performed, and the cart is stopped. Now, with this cart braking system, the following first and second steps are performed.

First, the vertical clearance between the floor surface 11 of the cart body and the traveling surface is reduced. That is, in this cart braking device, the bar 12, the link member 17, the joint 13, the rod 14, the rod cutout portion 15, the brake portion are provided below the floor surface 11 of the cart body at substantially the same height level as the brake petals 10 and the like. The bar 16 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 center around the shaft. It rotates around the axis and the brake member 16 moves up and down slightly. As described above, in this brake device, the components are arranged substantially below the floor surface 11 of the cart body, and the motions of the components are performed in the horizontal direction rather than in the vertical direction. There is no need for a large space above or below the floor surface 11 of the main body. In other words, in the vertical direction, it is only necessary to consider the vertical space clearance for the step allowance of the brake petal 10 and the release petal 9, compared to the case of the conventional example of this type shown in FIG. The upper and lower space clearance under 11 should be about half.

Secondly, the structure is simple, and its alignment, assembly, mounting, adjustment, etc. are easy. That is, the brake device of this cart is composed of a predetermined bar 12, a link member 17, a joint 13, a rod 14, a rod notch 15, a brake member 16, etc., and the number of constituent members is higher than that of the conventional example of this kind. However, the shape is relatively simple and the configuration is simple. Therefore, it is easy to process, align, assemble, install, adjust, etc., and these do not require particularly high precision.

First, in the illustrated example, such a braking device for a cart is provided for the two casters 1 below the floor surface 11 of the cart main body to break the two casters 1. However, the present invention is not limited to this, for example, it is also possible to apply all the breaks simultaneously to four casters 1 provided at four corners. Is. Secondly, as shown in FIG. 4C, it is possible to apply the brake device of the present invention by partially utilizing the conventional type. That is, although most of the brake device of the conventional cart having the brake device of the conventional example shown in FIG. 5 is removed, the components for one caster may be used as they are. It is possible. For example, as shown in FIG. 4 (3), the brake shoe 2 of the conventional example (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 device]

 As described above, the cart braking device according to the present invention has a bar that moves in the axial direction, a link member and a joint that rotate horizontally, a rod that rotates about an axis, and a rod notch with a semicircular cross section. The following effects are exhibited by the provision of a part and a brake member that moves slightly up and down.

First, the vertical space clearance between the floor surface of the cart body and the running surface is reduced. Therefore, it is possible to reduce the height of the floor of the cart body, and realize a low-floor type cart, and it is possible to use casters with a small diameter, for example. Secondly, it has a simple structure and is easy to process, align, assemble, install, and adjust, and it does not require high precision. It is excellent in terms of manufacturing cost and man-hours. Thus, the effects of the present invention are remarkably large, such as the problems existing in this type of conventional example are eliminated.

[Brief description of drawings]

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

FIG. 2 shows each member of the embodiment, (1) is a side view of a brake petal, a bar, etc., (2) is a side view of a release petal, and (3) is a rod, a rod. It is a side view of a notch part, a brake member, a caster, etc.

3 shows each member of the embodiment, (1) is a perspective view of a joint, a rod, etc., (2) is a rod notch,
A side view of the brake member, casters and the like, and (3) is an exploded perspective view of these.

FIG. 4 is a schematic front view of a rod notch portion, a brake member, a caster, etc., FIG. 1 (1) shows a brake released state in the same embodiment, and (2) shows a brake state in the same embodiment. (3) The drawings show the brake release states in other application examples, respectively.

FIG. 5 shows a conventional cart braking device,
(1) is a front view and (2) is a side view.

[Explanation of symbols]

 1 Caster 10 Brake Petal 11 Floor 12 Bar 13 Joint 14 Rod 15 Rod Notch 16 Brake Member 17 Link Member 19 Shaft 20 One End Side 21 The Other End Side 24 Pin 29 Holder 30 Flat Surface 31 Curved Part

Claims (1)

[Scope of utility model registration request] 1. A brake petal, which is substantially L-shaped, is attached by a horizontal shaft in the vicinity of the end of the cart main body, and one end is a free end and can be pushed down, and a base on the other end of the brake petal. A bar whose ends are connected to each other and is movable along the axial direction under the floor of the cart body, and one end of which is pivotally attached to the tip of the bar, and whose center is a vertical pin below the floor of the cart body. A link member that is pivotally attached and rotatable horizontally, a joint that is pivotally attached at one end to the end of the link member, and the other end of the joint is pivotally attached, and the holder is placed under the floor of the cart body. A rod rotatably held about an axis, a notch formed in a semicircular cross section at an end portion of the rod, a brake release position in which a flat surface portion is opposed to a lower brake member, and a curved portion. Rotational displacement is possible at the brake position where it is pressed against the brake member. A rod notch, a caster attached below the floor surface of the cart body, and an intervening member between the rod notch and the caster, and when the rod notch is in the brake release position, there is a gap to the lower caster. When the rod cutout is located at the brake position and the rod cutout is in the brake position, the rod cutout moves to the lower caster side by pressure contact with the upper rod cutout, and presses against the caster. A braking device for a cart, which comprises: