JP2005306143A - Braking mechanism for handcart - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a braking mechanism for a handcart which is not erroneously operated in the releasing direction of the lock fixation of wheels, and can simply and easily perform the braking operation for lock-fixing wheels to be unable to rotate. <P>SOLUTION: A braking lever 47 of a braking operation mechanism 41 is turned, and a braking member 34 of a braking mechanism 33 is pressed via a filament 35 to the inner peripheral surface on the braking side of a wheel 7 to perform braking. A locking lever 46 is turned in the locking direction which is the same as the braking direction of the braking lever 47, the whole of a tube 36 is pulled up and towed to stretch the tube into an approximately linear state. Then, a filament 35 is slacked or projected or the like by a length corresponding to the tension, and a protuberance 34b of the braking member 34 is fastened between rib sections 7a formed on the outer peripheral surface on the fixed side of the wheel 7, and thus, the wheel 7 is lock-fixed to be unable to rotate. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention provides a braking mechanism for a wheelbarrow used for a silver car or an elderly car used for walking training, function recovery, shopping, walking, etc. About.

  Conventionally, as the above-described wheelbarrow, for example, a brake operating rod at hand is pulled up, and an operating rod is pressed against a rear wheel via a traction member for braking. In addition, a handcart such as a baby stroller of Patent Document 1 or a shopping cart for the elderly, in which the operation handle at the hand is pushed down and the lock rod of the operating rod is engaged with the lock member provided on the wheel by the elastic force of the pressing spring. Then, the brake operating rod is pulled up, and the braking portion of the brake rod is brought into contact with the rear wheel via the pulling wire and the linkage to perform braking. In addition, there is a brake rod operating device in a stroller of Patent Document 2 in which a brake operation rod is pushed up, and a fixing portion of the brake rod is engaged with a locking rib of a rear wheel foil to lock a rear wheel.

  However, the brake mechanism disclosed in Patent Documents 1 and 2 described above pushes down the operation handle and the brake operation rod, and engages the lock rod of the operating rod with the lock member of the wheel, or the fixing portion of the brake rod as the rear wheel foil. The wheel is locked and fixed so as not to rotate by engaging with the locking ribs, etc., but the rotation direction of the operation handle and brake operation rod is different from that of the brake operation rod. When the turning operation is performed in the same braking direction as the brake operation rod, the lock fixing of the wheel is released. In other words, when parking the wheelbarrow in an inclined place, it is easy to misoperate the operation handle and brake operation rod in the direction in which the wheel lock is released, and there is a problem that you may forget to lock the rear wheel. Have.

Japanese Patent Publication No. 7-80461. Utility model registration No. 2566534.

  In view of the above problems, the present invention can be erroneously operated in a direction in which the wheel lock is released by providing a brake lever for braking the wheel and a lock lever for rotating and fixing the wheel so as to be rotatable in the same direction. It is another object of the present invention to provide a braking mechanism for a handcart that can easily and easily perform a brake operation for locking and fixing a wheel so as not to rotate.

  According to the present invention, a brake lever attached to the vicinity of a handle portion is operated to rotate in a braking direction, and a braking member is provided on a braking side peripheral surface of a wheel pivotally supported on a lower end of a frame body via a linear member connected to the brake lever. A brake mechanism for a handcart that presses against and brakes, and a braking member attached to the lower end of the frame is moved in a direction opposite to the braking side peripheral surface of the wheel and the fixed peripheral surface facing the peripheral surface The upper end of the cylinder body in which the concave and convex portions that engage with the wheel and the state in which the wheel is rotationally fixed are provided on the fixed side facing surface of the wheel and the braking member, and the linear body is inserted to be towable Is connected to a lock lever provided in the vicinity of the brake lever, and the lower end of the cylinder is connected to a restricting member attached to the frame on the upper side of the brake member, so that the entire cylinder is the same as the braking direction of the brake lever. The lock lever that is rotated in the locking direction The brake member is provided so as to be able to be tensioned in a substantially linear state, and the linear member is loosened or protruded by a length corresponding to the tension of the cylindrical body, and the concave portion and the convex portion are engaged with each other. It is a braking mechanism of the handcart which moves.

  The above-mentioned striate body can be composed of, for example, a wire, a wire, a thread, a string, or the like. Moreover, a recessed part can be comprised, for example between ribs or a groove part. Moreover, a cylinder can be comprised by what has cylindrical shapes, such as a tube, a flexible tube, a spiral cover, for example. Moreover, a convex part can be comprised by a processus | protrusion, a nail | claw part, etc., for example. In other words, the brake lever is rotated in the braking direction, and braking is performed by pressing the wheels and the braking-side facing surfaces of the braking member against each other via the linear body. The brake lever is turned in the brake release direction to release the brake by separating the wheel and the braking-side facing surface of the brake member. The lock lever is turned in the same locking direction as the braking direction of the brake lever, and the entire cylinder into which the filament is inserted is pulled and tensioned in a substantially straight state, and the length corresponding to the tension. Only by loosening or projecting the striatum, the braking member is moved in the direction in which the concave portion and the convex portion formed on the fixed surface of the wheel and the braking member are engaged with each other, and the concave portion and the convex portion Are engaged with each other to lock the wheel in a non-rotatable manner. The lock lever is turned in the unlocking direction, the entire length of the filament is accommodated in a state along the inside of the cylinder, the concave portion and the convex portion are separated from each other, and the lock fixing of the wheel is released.

  As an embodiment, an urging means for urging in the direction in which the concave portion and the convex portion are engaged with each other can be provided. That is, for example, it can be urged by an elastic urging means that uses a restoring force of an elastic body such as a spring or synthetic rubber, or can be urged by a self-weight urging means that uses its own weight such as a braking member or a weight. The engagement of the wheel recesses and the brake member protrusions is not released by any method other than the vibration applied when the handcart is running and the lock lever turning operation, and the mutual engagement state is maintained. Is done.

  In addition, it is possible to provide a rotation restricting means for restricting the rotation of the lock lever at an angle at which the lock fixing of the wheel is maintained. In other words, for example, the shaft portion of the guide member connected to the lower end of the lock lever is engaged with the groove portion of the inner wall surface of the case, and the rotation of the wheel is restricted to an angle at which the wheel is locked so as not to rotate, or the cam or the alternate, The rotation can be restricted by a rotation restricting means such as a magnet.

  Moreover, the resistance provision part which provides contact resistance required in order to brake this wheel can be provided in the braking side opposing surface of the said wheel and a braking member. That is, for example, braking can be performed by mounting a brake pad made of synthetic rubber, synthetic leather, or cloth, or by forming an uneven surface to which contact resistance is imparted.

  According to the present invention, the lock lever is rotated in the same locking direction as the braking direction of the brake lever to lock the wheel so that it cannot rotate. In addition, the state where the wheelbarrow is stopped can be maintained. In addition, since the brake lever and the lock lever can be rotated in the same direction by the hand holding the handle portion, the brake operation for braking and rotating and fixing the wheel can be performed easily and easily. In addition, since the urging means always urges toward the direction in which the concave portion and the convex portion formed on the fixed side facing surface of the wheel and the braking member are engaged, it is given during traveling or loading of luggage. The engagement between the concave portion and the convex portion is not released by the vibration, and the locked state of the wheel can be maintained.

  An object of the present invention is to provide a brake lever for braking a wheel and the wheel for the purpose of easily and easily performing a brake operation for braking and rotating and fixing the wheel without erroneous operation in a direction in which the wheel is locked and unlocked. This can be achieved by providing a lock lever for rotation and fixation so as to be rotatable in the same direction.

An embodiment of the present invention will be described in detail with reference to the drawings.
The drawings show a braking mechanism for a handcart used when an elderly person walks. In FIG. 1, FIG. 2 and FIG. 3, this handcart 1 includes left and right front frame bodies 3 constituting a vehicle body 2. , 3, the rear frame bodies 4, 4 and the back frame bodies 5, 5 are connected to each other so that the entire vehicle body 2 can be deformed into a traveling form and a folded form. In addition, a pair of left and right front wheels 6 and 6 (casters) are pivotally supported on the lower ends of the front frame bodies 3 and 3 via a swing mechanism 25 described later, and a pair of left and right rear wheels 7 and 7 are described later. It is pivotally supported on the lower ends of the rear frame bodies 4 and 4 via a braking mechanism 33 that performs the above operation.

  The upper end of the support members 8 and 8 fixed to the upper ends of the rear frame bodies 4 and 4 are pivoted higher than the middle part of the front frame bodies 3 and 3 and are connected to the lower ends of the support members 8 and 8. The end portions of 9 and 9 are connected to movable members 10 and 10 which are attached to the outer surface of the lower end side of the front frame bodies 3 and 3 so as to be vertically movable, and between the support members 8 and 8 and the movable member 10. , 10 are connected by a connecting rod 11 respectively.

  Further, the lower ends of the back frame bodies 5 and 5 formed in a substantially letter-like shape in side view are pivotally attached to the movable members 10 and 10, and the front ends of the movable members 12 and 12 formed in a substantially L-shape in side view are connected to the front frame. It pivots to the upper ends of the bodies 3 and 3, and the rear ends of the movable members 12 and 12 are pivoted to the middle part of the back frame bodies 5 and 5, so that the front frame bodies 3 and 3 are attached to the back frame bodies 5 and 5. It is provided so as to be movable up and down at an ascending position that is drawn along a state along the lower side and a descending position that is lowered obliquely downward on the front side.

  In addition, holders 13a, 13a to which a bag-like bag A (or a bag, a case, etc.) is detachably attached are attached to the intermediate portions at both ends of the pulling lever 13, and the intermediate portions at both ends of the pulling lever 13 are attached to the front frame bodies 3, 3. The middle part of both ends is connected by a connecting rod 13b.

  In addition, the lock plate 14 pivotally attached between the opposed end portions of the movable member 12 and the pull-up lever 13, as shown in FIG. 4, the pull-back operation of the release lever 15 attached to the inside of the pull-up lever 13 causes the back frame Both ends of the pulling lever 13 and the release lever 15 are rotated up and down by a locking angle locked to the shafts 16 and 16 projecting inside the bodies 5 and 5 and a release angle at which the locking is released. The coil spring 17 stretched between the two end portions urges the recess 14 a of the lock plate 14 to rotate in a direction in which the recess 14 a is locked to the shaft portion 16. That is, the concave portion 14a of the lock plate 14 is locked to the shaft portions 16 and 16 projecting inside the back frame bodies 5 and 5 by the urging force of the coil spring 17, and the entire handcart 1 is fixed to the traveling form. On the other hand, when the concave portion 14a of the lock plate 14 is detached from the shaft portion 16 of the back frame 5 by pulling up the release lever 15, the lock fixing is released, and the entire handcart 1 can be deformed into a folded form.

  In addition, both ends of the seat frame 18 formed in a size and shape capable of being seated by a person are pivotally attached to the inner middle portions of the front frame bodies 3 and 3 so as to be pivotable up and down, and a shape that can be gripped by hand is formed. The holders 19 and 19 are attached to both front ends of the seat frame 18, and the base ends of the arms 20 and 20 that guide the raising and lowering operation of the seat frame 18 are pivotally attached to the outer intermediate portion of the seat frame 18. The shaft portions 21 and 21 projecting from the inner intermediate portions of the front frame bodies 3 and 3 higher than the both ends of the seat frame 18 are engaged with the long holes 20a and 20a formed at the other end of the seat frame 18 so that the seat frame 18 Are pivotably provided at an upward angle that can be folded along the front frame bodies 3 and 3 and a forward angle at which a person can be seated.

  Further, when the seat frame 18 is angled forward, the shaft portions 21, 21 projecting inside the front frame bodies 3, 3 are formed in the recesses 20 b, 20 b formed at the base ends of the long holes 20 a, 20 a of the arms 20, 20. Locked and restricts the seat frame 18 from turning forward. Coil springs 22, 22 stretched between both ends of the seat frame 18 and the base ends of the arms 20, 20 engage the recesses 20 b, 20 b of the arms 20, 20 with the shaft portions 21, 21 of the front frame bodies 3, 3. It is urged to rotate in a direction to stop and to return to an upward angle. Further, the levers 23 and 23 fixed to the base ends of the arms 20 and 20 are used when the recesses 20b and 20b of the arms 20 and 20 are locked to the shaft portions 21 and 21 of the front frame bodies 3 and 3, respectively. When the recesses 20b and 20b of the arm 20 and 20b are detached from the shafts 21 and 21 of the front frame bodies 3 and 3, they are rotated against the urging force of the coil springs 22 and 22, and between the vicinity of the proximal ends of the arms 20 and 20 Are connected by a connecting rod 24. A bag-like bag B (or bag, case, etc.) is detachably attached to the lower surface of the seat frame 18.

  Since the swing mechanism 25 provided at the lower ends of the front frame bodies 3 and 3 is provided symmetrically, one mechanism will be described in detail with reference to the drawings. As shown also in FIG. 5, the lower support member 26 to which the wheel 6 is pivotally attached is attached to the upper support member 27 fixed to the lower ends of the front frame bodies 3 and 3 so as to be horizontally rotatable. Further, the lower support members 26 and 26 of the left and right wheels 6 and 6 may be connected so as to be swingable integrally with a connecting rod 28 indicated by a phantom line in FIG. In addition, a lock member 29 on which the wheel 6 is locked and locked so as not to swing is attached to the front outer surface of the upper support member 27 so as to be rotatable up and down, and a protrusion 26a formed on the front surface on the upper end side of the lower support member 26, In addition, a hole 29 a that is engaged with the protrusion 27 a formed on the lower front surface of the upper support member 27 while being substantially aligned vertically is formed on the lower front surface of the lock member 29.

  That is, when the upper end side of the lock member 29 is pulled up and the protrusion 26c of the lower support member 26 and the protrusion 27c of the upper support member 27 are locked to the hole 29a, the left and right wheels 6 and 6 are in a substantially frontal state. It is locked and locked and cannot swing. On the other hand, when the upper end side of the lock member 29 is pushed down and the protrusion 26c of the lower support member 26 and the protrusion 27c of the upper support member 27 are extracted from the hole 29a of the lock member 29, the front wheels 6 and 6 are locked. The fixation is released and the head can be swung in a desired direction.

  And the recessed part 30a and the convex part 30b which are formed on the inner side facing surfaces of the upper support member 27 and the lock member 29 and which are locked to each other include a pulling angle at which the front wheels 6 and 6 are locked and fixed. The rotation stops at the pressing angle at which the lock is released.

  Since the braking mechanisms 33 provided at the lower ends of the rear frame bodies 4 and 4 are provided symmetrically, one mechanism will be described in detail with reference to the drawings. As shown in FIGS. 6 and 7, a braking member 34 that is pressed against the inner peripheral surface of the wheel 7 on the braking side is attached to the lower end of the rear frame 4 so as to be movable up and down. A brake pad 34a made of synthetic rubber having a large contact resistance is attached to the upper part of the outer end side of the braking member 34. And the linear body 35 connected with the brake operation mechanism 41 mentioned later is inserted in the tube 36 wired along the inside or outside of the rear frame body 4, and the lower end of the tube 36 is connected to the rear frame body 4 above the braking member 34. The lower end of the linear member 35 led out from the lower end of the tube 36 is connected to the upper end on the inner end side of the braking member 34. Alternatively, a synthetic rubber pad having a large contact resistance may be attached to the braking side inner peripheral surface of the wheel 7.

  In addition, the coil spring 38 loaded between the braking member 34 and the regulating member 37 or wound around the linear member 35 between them has the brake pad 34a of the braking member 34 detached from the braking side inner peripheral surface of the wheel 7, and the wheel 7 is urged in a direction in which the projection 34b of the braking member 34 is locked between the rib portions 7a formed on the outer peripheral surface of the fixing side 7. Further, when the attachment position of the regulating member 37 is changed to a desired position along the rear frame 4, the lead-out length of the linear member 35 and the restoring force accumulated in the coil spring 38 can be variably adjusted. Further, the right and left regulating members 37 are connected by the connecting rod 37a. However, when the forward / backward movement of the user's foot that pushes the handcart 1 is hindered, the connecting rod 37a is moved back and forth. May be installed at a height that does not hinder or be removed.

  And the protrusion 34b formed in the outer end side lower part of the braking member 34 is latched between rib portions 7a formed on the fixed side outer peripheral surface (or shaft outer peripheral surface) of the wheel 7, and the rib portions 7a. The wheel 7 is substantially radially spaced from the inner central part of the wheel 7 at a predetermined interval in the circumferential direction. Further, the front wheel 6 can be braked by the brake mechanism 33 described above.

  The handle portion 39 attached to the upper ends of the back frame bodies 5 and 5 described above is a curved surface that has a shape along the front surface of the user's body (chest, abdomen, waist, etc.) and has a substantially arch shape or a gate shape when viewed from the front. In addition to being formed into a shape, the part gripped by the user is covered with a rubber non-slip member having a high contact resistance or formed on an uneven surface to which anti-slip resistance is imparted. Further, the upper end portions of the back frame bodies 5 and 5 are inserted into both end portions formed in the hollow shape of the handle portion 39 so as to be movable up and down, and are fastened and fixed by adjusting screws 40 attached to both end portions of the handle portion 39, The handle portion 39 is adjusted up and down (extension adjustment) to a height suitable for the user to hold. For example, the height may be adjusted with a ratchet or a pin.

  And since the brake operation mechanism 41 provided in the both ends of the handle | steering-wheel part 39 is provided symmetrically, one mechanism is explained in full detail based on figures. As shown in FIGS. 8 and 9, the upper end of the above-described tube 36 is inserted into the case 42 fixed to both ends of the handle portion 39 and connected to the pulling member 43 held inside the case 42 so as to be movable up and down. Then, the upper end of the linear member 35 led out from the upper end of the tube 36 is connected to a pulling member 44 that is pivotally supported inside the case 42 so as to be able to rotate back and forth, and the upper end of the pulling member 43 is held inside the case 42 so as to be obliquely movable. The guiding member 45 is connected to the lower end.

  In addition, the shaft portions 45a and 45a projecting on both sides of the upper end of the guide member 45 and the shaft portions 45b and 45b projecting on both sides of the lower end can be moved up and down to the groove portions 42a and 42a formed on the inner wall surfaces on both sides of the case 42. And both ends of the lock lever 46 attached to the front surface of the handle portion 39 are connected to the upper ends of the guide members 45 of the left and right cases 42, 42, and both ends of the brake lever 47 attached to the front side of the lock lever 46. Are connected to the upper ends of the traction members 44 of the left and right cases 42, 42. The brake lever 47 is urged to rotate in the braking release direction by an elastic body such as a spring or rubber.

  The illustrated embodiment is configured as described above, and the brake operation of the handcart 1 will be described below.

  First, when the handcart 1 assembled in the traveling mode shown in FIG. 1 is stopped at a desired location, the brake lever 47 of the brake operation mechanism 41 is rotated in the braking direction shown in FIG. The brake member 34 of the brake mechanism 33 is pulled upward via the body 35, and the brake pad 34 a of the brake member 34 shown by the phantom line in FIG. 7 is against the urging force of the coil spring 38 on the brake side inner peripheral surface of the wheel 7. Press contact and brake (stop rotation) with contact resistance generated in the contact part. On the other hand, when the brake lever 47 is rotated in the braking release direction shown by the solid line in FIG. 8, the braking member 34 is pushed downward by the urging force of the coil spring 38, and the braking side inner periphery of the wheel 7 shown by the solid line in FIG. Since the brake pad 34a of the braking member 34 is separated from the surface and the braking is released, the wheel 7 can be rotated.

  Next, when the handcart 1 is stopped at a tilted position, the lock lever 46 of the brake operation mechanism 41 is rotated in the locking direction shown by the solid line in FIG. The entire tube 36 in which the strip 35 is inserted is pulled upward and pulled to be tensioned from a substantially curved state to a substantially linear state, and the filament 35 is loosened by a length corresponding to the tension, or the filament 35 is When protruding, the braking member 34 of the braking mechanism 33 is pushed downward by its own weight or the urging force of the coil spring 38, and a protrusion 34 b of the braking member 34 shown by a solid line in FIG. Since the wheel 7 is locked and fixed so as not to rotate, the wheelbarrow 1 is maintained in a stopped state.

  In addition, the guide member 45 connected to the pulling member 43 moves upward while rotating in an inclined state, the shaft portion 45a of the guide member 45 is engaged with the upper end of the groove portion 42a of the case 42, and the groove portion 42a of the case 42 is intermediate. The shaft 45b of the guide member 45 is engaged to restrict the rotation of the lock lever 46 to the locked state, and the upper end of the guide member 45 is locked to the lower end side locking portion of the traction member 44. Therefore, the pulling member 43 is not lowered, and the entire tube 36 is maintained in the upwardly pulled state, and the locked state of the wheel 7 is maintained.

  On the other hand, when the lock lever 46 is rotated in the unlocking direction shown by the solid line in FIG. 8, the upper end of the guide member 45 is detached from the lower end side locking portion of the pulling member 44, and the rotation fixing of the brake lever 47 is released. . In addition, the guide member 45 connected to the pulling member 43 moves downward while rotating and returning to an upright state, the shaft portion 45a of the guide member 45 engages with the middle of the groove portion 42a of the case 42, and the lower end of the groove portion 42a of the case 42 Since the shaft 45b of the guide member 45 is engaged with the lock member 46 and the lock lever 46 is restricted from being unlocked, the entire tube 36 is restored to the curved state by the lowering of the pulling member 43, and the linear member 35 is 36 is accommodated again, and the protrusion 34b of the braking member 34 is extracted from between the rib portions 7a of the wheel 7, and the lock fixing of the wheel 7 is released, so that the wheelbarrow 1 can be moved and moved. .

  As described above, the lock lever 46 is rotated in the same locking direction as the braking direction of the brake lever 47 to lock the wheel 7 so that it cannot rotate. Without being done, the stop state of the handcart 1 can be maintained. In addition, since the brake lever 47 and the lock lever 46 can be rotated in the same direction by a hand holding the handle portion 39, the brake operation for braking and rotating and fixing the wheel 7 can be performed easily and easily. In addition, since the coil spring 38 always urges the ribs 7a of the wheels 7 in the direction in which the protrusions 34b of the braking member 34 are engaged, vibration applied during traveling or loading of luggage. Thus, the engagement between the rib portion 7a and the protrusion 34b is not released, and the locked state of the wheel 7 can be maintained.

In the correspondence between the configuration of the present invention and the above-described embodiment,
The cylinder of the present invention corresponds to the tube 36 of the embodiment,
Similarly,
The recess corresponds to between the ribs 7a of the wheel 7,
The convex portion corresponds to the protrusion 34b of the braking member 34,
The biasing means corresponds to the coil spring 38,
The rotation restricting means corresponds to the guide member 45 and the shaft portions 45a and 45b and the groove portion 42a of the case 42,
The resistance applying portion corresponds to the brake pad 34a,
The present invention is not limited to the configuration of the above-described embodiment.

  For example, the brake pad 34a of the braking member 34 is pressed against the stationary outer peripheral surface of the wheel 7 to brake, and the protrusion 34b is engaged between the ribs 7a formed on the braking inner peripheral surface of the wheel 7 to be locked. You can also

  The braking mechanism for a handcart of the present invention can be used for, for example, a stroller, a shopping cart, a luggage carrier cart, a wheelchair, and the like.

The side view which shows the wheelbarrow of driving | running | working form. The side view which shows the wheelbarrow of a folding form. The front view which shows the wheelbarrow with the back removed. The side view which shows a folding mechanism. The side view which shows the swing mechanism of a front wheel. The front view which shows the braking cancellation | release state of the rear wheel by a braking mechanism. The front view which shows the locked state of the rear wheel by a braking mechanism. The side view which shows the brake release state by a brake operation mechanism. The side view which shows the locked state by a brake operation mechanism.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Wheelbarrow 2 ... Car main body 3 ... Front part frame body 4 ... Rear part frame body 5 ... Back part frame body 6, 7 ... Wheel 7a ... Rib 33 ... Braking mechanism 34 ... Braking member 34a ... Brake pad 34b ... Projection 35 ... Line Strip 36 ... Tube 37 ... Restriction member 38 ... Coil spring 39 ... Handle part 41 ... Brake operation mechanism 42 ... Case 43, 44 ... Traction member 45 ... Guiding member 46 ... Lock lever 47 ... Brake lever

Claims (4)

A brake lever attached in the vicinity of the handle is rotated in the braking direction, and a braking member is pressed against the braking side peripheral surface of the wheel pivotally supported on the lower end of the frame body via a linear member connected to the brake lever. A braking mechanism for a handcart for braking,
The brake member attached to the lower end of the frame body is provided so as to be movable in a direction opposite to the brake side peripheral surface of the wheel and the fixed side peripheral surface facing the peripheral surface,
A concave portion and a convex portion that engage in a state in which the wheel is rotationally fixed are provided on the fixed-side facing surface of the wheel and the braking member,
The upper end of the cylinder body into which the linear body is inserted in a pullable manner is connected to a lock lever provided in the vicinity of the brake lever, and the lower end of the cylinder body is connected to a regulating member attached to the frame body above the braking member,
The entire cylinder is provided so as to be able to be tensioned in a substantially linear state by the lock lever that is rotated in the same locking direction as the braking direction of the brake lever.
A brake mechanism for a handcart that moves the braking member in a direction in which the concave portion and the convex portion are engaged with each other by loosening or projecting the linear body by a length corresponding to the tension of the cylindrical body. The brake mechanism of the handcart of Claim 1 provided with the urging means which urges | biases the said braking member in the direction where the said recessed part and a convex part are mutually engaged. The wheelbarrow braking mechanism according to claim 1, further comprising a rotation restricting unit that restricts the lock lever from rotating at an angle at which the lock of the wheel is fixed. 2. The braking mechanism for a handcart according to claim 1, wherein a resistance imparting portion for imparting a contact resistance necessary for braking the wheel is provided on a braking side facing surface of the wheel and the braking member.

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