JP4497628B2 - Wheelbarrow braking device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention generally relates to a wheelbarrow that is convenient for use by an elderly person who is primarily worried about the legs and legs, referred to as a silver car or an elderly car, for shopping or taking a walk. The present invention relates to a car braking device.
[0002]
[Prior art]
First, the applicant of the present invention is a silver car 1 as shown in FIG. 11, and by operating the operation lever 4 of the operation means 3 attached to one push rod 2, the stopper means is simultaneously applied to the rear wheels 5, 6. A stopper device that acts to stop the wheels 5 and 6 is disclosed (Japanese Patent Application No. 10-289057). In this stopper device, when the operation lever 4 is operated, the stopping force for stopping the silver car is branched in two directions by the force branching means 7, from which the stopping force is transmitted to the left and right rear wheels. This is to stop the silver car.
[0003]
[Problems to be solved by the invention]
However, in this stopper device, it is only possible to hold the silver car 1 in a stopped state or to release the stopped state, for example, while operating a brake on the silver car on a steep downhill or the like. I could n’t get off. Therefore, for example, when trying to get off a long slope with a lot of shopping loaded on a silver car, there is a concern that the operator of the silver car often gets a leg. Various brake devices have been disclosed so far. However, in these devices, it is impossible to stop and lock the silver car so that the silver car cannot be moved at the same time only by braking the silver car. In addition, the conventional devices require considerably complicated elements, and the structure has not been simple enough to be easily used by the elderly. Therefore, the present invention is a braking device for a silver car, which can hold the silver car in a stopped state, and is a so-called brake capable of slowly running the silver car on a downhill, etc., although it is not a complete stopped state. Provided is a braking device for a silver car that can also run in an operating state.
[0004]
[Means for Solving the Problems]
The braking device for a wheelbarrow of the present invention, an operation unit mounted on the wheelbarrow, an operation unit mounted close to the wheel of the wheelbarrow, an operation wire connecting the operation unit and the operation unit, The operation unit includes a fixed member, a pivot member that is pivotable with respect to the fixed member, a lock member that is pivotable with respect to the pivot member, and the pivot member. A first coil spring that is elastically contacted, a fixing member is fixed to the handcart, a pivoting member holds one end of the operating lever and one end of the operating wire, The lock member controls the position of the pivot member with respect to the fixed member, the operating portion has a second coil spring and a braking member, and the braking member contacts the outer surface of the wheel to perform a braking action. Work on the brake piece and the center of the wheel And it has a locking piece which chain the vehicle in a stopped state, a, the end portion of the second coil spring the other end to the wheelbarrow is retained to the brake pieces.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a handcart 10 (hereinafter referred to as a silver car) such as a silver car equipped with a braking device according to the present invention. The silver car 10 generally includes a U-shaped front leg 12 having a front wheel 11 at the lower end, and a pair of rear legs having a rear wheel 13 at the lower end and the upper end pivotally supported by the front leg 12. 14, a U-shaped foldable seat 15 pivotally supported by the front leg 12 on each side, so that the user can back up anytime and anywhere, and a U-shape disposed on the front leg 12 A shopping bag 16 suspended from a widthwise extending portion above the front leg, a pair of push rods 17, and a lower end portion of the push rod 17 on one side through the front leg 12 and holding the lower portion of the shopping bag 16 and the front leg 12 on the other side The U-shaped shopping bag holding body 18 extending to the push bar 17 on the other side, the pair of connecting bodies 19 that connect the lower end of the push bar 17 and the rear leg 14, and the rear legs are connected to each other. So as not to get in the way A U-shaped member holding a shopping bag 16, a holding body 20 bent in a U-shape toward the direction, a pair of first auxiliary bars 21 connecting the front leg 12 and the push bar 17, A second auxiliary rod 22 extending from one side of the shopping bag and supporting the lower part of the seat 15 from the front leg 12 on one side and leading to the other side of the shopping bag through the front leg 12 on the other side, 2 A pair of third auxiliary bars 23 connecting the auxiliary bars 22, a fourth auxiliary bar 24 connecting and reinforcing upper portions of the pair of push bars 17, and hook means for holding the assembly position of the silver car 25. The silver car 10 can be folded in the front-rear direction by releasing the hook means 25.
[0006]
The braking device 30 according to the present invention includes a pair of operation portions 31 that are respectively attached to the pair of left and right push rods 17 and a pair of operation portions 32 that are respectively operated to the pair of left and right rear wheels 13. Since the pair of operation units 31 and the pair of operation units 32 have substantially the same configuration, only one operation unit 31 and operation unit 32 will be described below. The braking device 30 is different from the known silver car 1 stopper device. For example, when the left (right) operating portion 31 is operated, only the left (right) operating portion 32 is operated. In order to operate the operation part 32 simultaneously, it is necessary to operate the operation part 31 of both sides simultaneously.
[0007]
As shown in FIG. 2, the operation unit 31 includes a fixing member 34 fixed to the push rod 17 by a pin 33, a pivotable member around the pin 33, and an operation lever 35 that receives the operation lever 35 together with the lever. A pivot member 36 that pivots to the pivot member 36, and a pin 37 that fixes the operation lever 35 to the pivot member 36 , and the operating portion 32 (see FIG. 1) is attached to the wheel 13 . The lock member 38 is configured to lock the silver car 10 in a stopped state.
[0008]
FIG. 3 is a view of the operation unit 31 of FIG. 2 as viewed along the arrow 3-3 of FIG. A first coil spring 39 is provided between the pin 33 and the lock member 38 and urges the lock member 38 to be elastically contacted with the pivot member 36 at all times.
[0009]
FIG. 4 shows a perspective view of the fixing member 34. The fixing member 34 includes a first hollow portion 40 which push bar 17 extends, the rear extension portion 41 which proceeds preferably toward the aft extending integrally silver car 10 from the lower portion of the first hollow 40 And have. The upper surface 42 of the rear extension 41 is inclined rearward and downward, and a first long hole 43 is provided near the tip. The inner diameter of the first hollow 40 is substantially coincides with the outer diameter of the push rod 17, the upper part of the first hollow portion 40 has a pin 33 (see FIGS. 2 and 3) are diametrically through the push rod 17 A pair of holes 44 for penetrating is provided.
[0010]
FIG. 5 shows a perspective view of the pivot member 36. Pivotal member 36 is generally a second hollow portion 50 of the bottomed for receiving the end portion of the L-shape bent in that the operating lever 35 (see FIGS. 1 and 2), the second hollow portion 50 A pair of elongated wall portions 51 that preferably extend integrally from the lower side wall portion to the front. Here, the second hollow portion 50 and the extending wall portion 51 cross each other at an obtuse angle. The inner diameter of the second hollow portion 50 is substantially coincides with the outer diameter of the operating lever 35, the pin 37 is in the upper part of the second hollow portion 50 (see FIGS. 2 and 3) via the operating lever 35 A pair of holes 52 for penetrating in the diameter direction is provided. Similarly, a hole 53 through which the pin 33 (see FIGS. 2 and 3) penetrates in the diametrical direction through the hole 44 of the fixing member 34 and the push rod 17 is provided in a front portion of both the extending wall portions 51. . Further, a short second long hole 55 is provided near the center of the bottom 54 (see FIG. 3) of the second hollow portion 50 . An operation wire 56 (see FIGS. 1, 4 and 5) extends through the second long hole 55 . The has stopping piece 57 exits the upper end of the wire 56 is fixed, locking pieces 57 this omission is given as not come out from there engage into the second slot 55. The wire 56 extends downward as indicated by an arrow 58 and then extends through the first long hole 43 of the fixing member 34 to the operating portion 32 as indicated by an arrow 45 in FIG.
[0011]
FIG. 6 shows a perspective view of the lock member 38. The lock member 38 includes a main body 60 having a semi-cylindrical shape obtained by dividing a cylindrical body in the longitudinal direction, a pair of protrusions 61 extending forward from an upper portion of the main body 60, and one of the main bodies 60. An operation piece 62 protruding substantially perpendicularly to the side surface from the side surface, a spring receiving piece 63 protruding substantially perpendicular to the side surface from the other side surface of the main body 60, and a lower end portion of the main body 60 are provided. And a bottom 64 having a crescent shape for some reinforcement. The pair of protrusions 61 is provided with a hole 65 through which the pin 37 (see FIGS. 2 and 3) passes through the hole 52 of the pivot member 36 and the operation lever 35 in the diametrical direction. The spring receiving piece 63 holds the other end of the first coil spring 39 whose one end is held by the pin 33 (see FIG. 3).
[0012]
On the other hand, the operation part 32 is configured by a second coil spring 70 (see FIG. 1) and a braking member 71 (see FIGS. 1 and 7) that acts on the rear wheel 13. As shown in FIG. 1, the upper end portion of the second coil spring 70 is held by a pin-shaped spring receiving member 26 attached to the rear leg 14. As shown in FIG. 7, the braking member 71 includes a brake piece 74 formed of a front straight plate and a locking piece 75 having a substantially U-shape at the rear. The locking piece 75 having a substantially U-shape is formed of a single straight plate, and both ends thereof are bent outward from each other, and the brake pieces 74 are mutually connected from the bent portion 76. A parallel portion 77 extending parallel to the direction and sandwiching the rear leg 14 therebetween, and a central connecting portion 78 bent at a right angle from the other end of the parallel portions 77. Yes. The locking piece 75 is fixed to the brake piece 74 by welding or the like via the connecting portion 78. The parallel portion 77 has two holes 79 and 80, respectively. A pivot pin 27 (see FIG. 1) passes through the hole 79 of the parallel portion 77 sandwiching the rear leg 14 through the rear leg 14. A fixing tool 28 (see FIG. 1) for fixing the lower end of the operation wire 56 is attached to the hole 80 provided behind the hole 79, and the lower end of the operation wire 56 is long to the fixing tool 28. It is fixed so that it can be adjusted. The fixture 28 can be formed of the same member as the fixture that adjustably fixes the brake wire of a normal bicycle.
[0013]
The brake piece 74 has a function of receiving the lower end portion of the second coil spring 70 (see FIG. 1) and operating the operation portion 31 to contact the outer peripheral surface of the rear wheel 13 and apply a brake to the wheel. ing. In the brake piece 74 shown in FIG. 7, when the rear wheels 5 and 6 on both sides are double wheels, as shown in FIG. A brake force is applied to the wheel by contacting the outer peripheral surface. Therefore, when the rear wheels on both sides are each a single wheel, the braking member 71 has one bent portion 76, one side parallel portion 77, and the end of the parallel portion 77 to the bent portion 76. And a brake piece 74 extending in parallel in the same direction. The reason why the holes 80 are formed in the two parallel portions is that the mounting position of the operation wire 56 can be changed by the left and right rear wheels, respectively.
[0014]
The operation of the braking device 30 in the present invention will be described below. When the braking device 30 is in the position shown in FIGS. 1 and 2, in the operation portion 31, the lock member 38 is elastically contacted with the rear surface of the pivot member 36 by the first coil spring 39 , and the lock member 38 is a fixing member. 34 on an inclined upper surface 42 (see FIG. 4). Further, as shown in FIG. 1, the operation lever 35 is somewhat separated from the upper end portion of the push rod 17 for manipulating the silver car 10. That is, the user of the silver car 10 does not operate the operation lever 35 at all, and the operation unit 31 is in the normal position, that is, the traveling position. On the other hand, in the operation part 32, the braking member 71 is pulled by the operation wire 56, and as shown by a broken line in FIG. In this position, are slightly apart brake shoes 74 of the braking member 71 from the outer circumferential surface of the rear wheel 13 is not able to act on the brake shoe 74 is the rear wheel 13. Therefore, at this position, the silver car 10 can be freely steered.
[0015]
Next, when the user pulls the operation lever 35 (see FIG. 1) upward, the operation unit 31 takes the position shown in FIG. That is, when the operation lever 35 is pulled upward, the pivot member 36 and the lock member 38 of the operation unit 31 pivot together around the pin 33, and the lock member 38 moves upward from the upper surface portion 42 of the fixing member 34. Lifted. For this reason, the operation wire 56 accommodated in the pivot member 36 moves upward to pull up the operation wire 56 (see FIGS. 1 and 10). Therefore, in FIG. 10, the operation wire 56 is pulled upward from the broken line position. As a result, the braking member 71 is rotated counterclockwise around the pin 27 from the position of the broken line against the spring force of the second coil spring 70 in FIG. Therefore, the brake piece 74 of the braking member 71 comes into contact with the outer peripheral surface of the rear wheel, and a braking force is applied to the rear wheel 13. Therefore, the moving speed of the silver car 10 is in a low speed state. That is, the brake is operating. When the operating lever 35 is released in this state, the braking force of the second coil spring 70 causes the braking member 71 to rotate clockwise around the pivot pin 27 to pull the brake piece 74 away from the outer peripheral surface of the rear wheel, and to act as a brake. To stop. At the same time, the operation wire 56 is pulled downward, and the pivot member 36 and the lock member 38 of the operation unit 31 return to the normal positions shown in FIG.
[0016]
When the silver car 10 in non stop locked state or locked state migration, the operation unit 31 in the state of FIG. 2, by operating the operating piece 62 of the locking member 38, the locking member 38, the first coil spring 39 9 (see FIG. 3)), it rotates counterclockwise around the pin 37 and slides the lock member 38 on the upper surface 42 of the fixing member 34 to the position shown in FIG. Moving. In this position, the lock member 38 is elastically contacted with the distal end portion of the rear extension 41 of the fixing member 34 by the elastic force of the first coil spring 39 , and the extension wall portion 51 of the pivot member 36 is in contact with the rear extension 41 of the fixing member 34. The pin 33 is rotated clockwise until it comes into contact with the upper surface 42. At this time, the operation lever 35 (see FIG. 1) moves clockwise around the pin 33 from the position shown in FIG. For this reason, the braking member 71 rotates clockwise around the pin 27 by the elastic force of the second coil spring 70 (see FIGS. 1 and 10), and pulls the operation wire 56 downward. As a result, a plurality of (eight in the illustrated example) protruding portions 90 are formed in which the bent portions 76 of the braking member 71 are radially extended integrally with the central portion of the rear wheel 13 as is well known. Is fitted into the radial groove 91. For this reason, the silver car 10 cannot be moved. In this state, the user can sit down on the seat 15 and rest safely.
[0017]
In order to make the silver car 10 movable from this state, the operation lever 35 is simply moved slightly upward around the pin 33. As a result, the lock member 38 moves upward from the position of FIG. 9 and easily returns to the position of FIG. In order to facilitate the movement of the locking member 38, the upper surface 42 provided on the rear extension 41 of the fixing member 34 is inclined rearward and downward, and the tip 45 (see FIG. 4) of the rear extension 41 is vertical. It is not cut off, and is inclined toward the rear and downward.
[0018]
【The invention's effect】
In the braking device of the present invention, the vehicle can be held in the stop-locked state where it cannot move, that is, in the locked state, and in the brake operating state only by operating the operation unit arranged in the vicinity of the push rod. For this reason, even those with weak legs can run downhill safely. The operation unit 31 constituting the braking device 30 of the present invention slides on the fixed member 34 having the inclined surface, the operation member 36 having the operation lever 35, and the inclined surface of the fixed member 34. The lock member 38 is simple in structure and easy to operate. Therefore, even the elderly can easily switch to the traveling position, the brake position, and the locking position. The braking device of the present invention can be conveniently used not only for the above-described silver car but also for baby carriages, shopping carts, and other handcarts.
[Brief description of the drawings]
FIG. 1 is a side view of a handcart equipped with a braking device according to the present invention.
FIG. 2 is a diagram showing an operation unit during travel of the braking device according to the present invention.
FIG. 3 is a view taken along the line 3-3 in FIG. 2;
FIG. 4 is a perspective view of a fixing member.
FIG. 5 is a perspective view of a pivot member.
FIG. 6 is a perspective view of a lock member.
FIG. 7 is a perspective view of a braking member.
FIG. 8 is a diagram illustrating a positional relationship of the operation unit when the brake is operated.
FIG. 9 is a diagram showing the positional relationship of the operation unit when the handcart is in a locked state where it cannot move.
FIG. 10 is a diagram for explaining the operation of the operating unit.
FIG. 11 is a diagram showing an example of a known braking device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10: Wheelbarrow 30: Braking device 31: Operation part 32: Actuation part 34: Fixing member 35: Operation lever 36: Pivoting member 38: Lock member 39: 1st coil spring 40: 1st hollow part 41: Backward extension part 42 : Upper surface 43: 1st long hole 45: Tip part 50: 2nd hollow part 51: Elongated wall part 54: Bottom part 55: 2nd long hole 56: Operation wire 60: Main body 61: Protrusion part 62: Operation piece 63: Spring receiving piece 70: Second coil spring 71: Braking member 74: Brake piece 75: Locking piece 76: Bending portion 77: Closing portion 78: Connection portion 90: Protrusion 91: Radial groove

Claims (2)

A braking device 30 for a wheelbarrow,
An operation unit 31 attached to the wheelbarrow;
An actuating part 32 mounted close to the wheelbarrow wheel;
An operation wire 56 that connects the operation unit 31 and the operation unit 32, and
The operation unit 31 is
A fixing member 34;
A pivot member 36 which is pivotable relative to the fixed member 34;
A locking member 38 which is pivotable with respect to the pivot member 36;
A first coil spring 39 that elastically contacts the lock member 38 with respect to the pivot member 36,
The fixing member 34 is fixed to the wheelbarrow,
The pivot member 36 holds one end of the operation lever 35 and one end of the operation wire 56,
A locking member 38 controls the position of the pivoting member 36 relative to the fixing member 34;
The operating part 32 has a second coil spring 70 and a braking member 71,
The braking member 71 is
A brake piece 74 that contacts the outer surface of the wheel and performs a braking action;
A locking piece 75 that acts on the center of the wheel to chain the vehicle into a stopped state,
One end of the second coil spring 70 is held by the handcart and the other end is held by the braking member 71,
The braking member 71 holds the other end of the operation wire 56,
The brake piece 74 and the locking piece 75 are held by the operation wire 56 in a state where the wheelbarrow can be freely steered without contacting the wheel.
By operating the operation lever 35 and moving the operation wire 56 from the freely steerable state, a braking action is performed,
The lock member 38 and the pivot member 36 are elastically moved by the elastic force of the first coil spring 39 from the state where the lock member 38 can be freely steered against the pivot member 36 by the elastic force of the first coil spring 39 . The lock member 38 is moved against the force and elastically contacted with the fixing member 34 by the elastic force of the first coil spring 39 , so that the lock member 38 is chained in a stopped state by the elastic force of the second coil spring 70. A braking device for a wheelbarrow characterized by that. Fixing member 34, a first hollow portion 40 for mounting to the wheelbarrow, a rear extension portion 41 which extends toward the traveling direction behind the wheelbarrow from the first hollow portion 40 has a,
The upper surface 42 of the rear extension 41 is inclined rearward and downward and has a first elongated hole 43 .
Pivotal member 36, chromatic and second hollow portions 50 having a bottom for receiving the end portion of the operation lever 35, a pair of elongated wall portion 51 which extends forwardly from the second hollow portion 50, a And
Furthermore, it has the 2nd long hole 55 in the bottom part 54 of the 2nd hollow part 50 ,
The lock member 38 includes a main body 60, a pair of protrusions 61, an operation piece 62, and a spring receiving piece 63,
The pair of elongated wall portions 51 are attached to the first hollow portion 40 ,
The pair of protruding portions 61 are attached to the second hollow portion 50 ,
One end of the first coil spring 39 is attached to the spring receiving piece 63,
The operation wire 56 is attached to the bottom portion 54, extends through the second elongated hole 55 and the first elongated hole 43 to the operating portion 32,
The locking member 38, in the free steering can state, is placed to the upper surface 42 of the rear extension portion 41, when the chain stopped causes the elastic contact to the distal end portion of the rear extension portion 41 The braking device for a handcart according to claim 1.

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