JP2009269495A - Folding locking device of walker for aged person - Google Patents

Abstract

An object of the present invention is to provide a lock device capable of easily locking and unlocking a running posture or a sitting posture of a handcart without requiring labor.
A folding lock device 20 of a handcart 1 has a seat portion 3 having a handrest 2 and a handwheel handle 4 disposed behind the seat portion 3 supported by a front wheel 8 and a rear wheel 9, and the handrest 2 or The frame 10 of the handcart 1 is configured so that the handcart 1 can be folded from the running position or the sitting position to the folded position by operating the front end side portion of the seat portion 3 toward the handwheel 4. The frame 10 is provided with a first link plate 13, and an operation plate is pivotally supported so as to be swingable with a hand-holding handle side portion of the first link plate 13 as a swing pivot point.
[Selection] Figure 1

Description

  The present invention relates to a folding lock device for a handcart used by an elderly person instead of a cane or for shopping.

  In recent years, an elderly person uses a wheelbarrow as a means of carrying a substitute for a cane or shopping. These wheelbarrows are generally called "silver cars" and, unlike canes, can be moved easily by pushing a part of their own weight, and can often sit and rest. Thus, a seat part, a backrest, etc. are provided and formed.

  As a handcart of this type, in Patent Document 1 below, when it is desired to brake the wheelbarrow and maintain the state, simply operating the lever portion of the lock lever, without requiring a strong force, There is a disclosure related to a brake device for a wheelbarrow brake that can hold the brake applied reliably.

JP 2006-282038 A

  However, there is no disclosure regarding a lock device that can lock and unlock the wheelbarrow in the traveling position or the sitting position, and the wheelbarrow can easily lock the traveling position or the seating position of the wheelbarrow with a simple operation without any effort. In addition, there has been a demand for a lock device that can unlock and enhance the safety of the silver car.

  The present invention has been made in view of the above-described conventional problems, and it is an object of the present invention to provide a locking device that can easily lock and unlock the running posture or sitting posture of a handcart without requiring labor. To do.

  In order to achieve the above object, a folding lock device for a handcart according to the present invention includes a seat portion having a handrest and a handwheel handle disposed behind the seat, and is supported by a front wheel and a rear wheel. The wheelbarrow frame is configured so that the wheelbarrow can be folded from the running position or the sitting position to the folded position by operating the front end side portion of the seat portion toward the handwheel handle, and the wheelbarrow is attached to the wheelbarrow frame. In a folding lock device of a handcart provided with a lock device capable of locking and unlocking a running posture or a seating posture, a rear wheel support member that supports a rear wheel at a lower end portion and a handrest at an upper end portion, and a front wheel The front wheel support member whose upper end is pivotally supported at the intermediate height position of the rear wheel support member and the lower end of the handwheel handle The first link plate connected to the support member, the second link plate connecting the lower end of the handwheel handle to the front wheel support member, and the handwheel handle and the lower part of the backrest portion above the second link plate, A third link member that forms a frame is provided to form a handcart frame, and an operation plate that pivots on a handwheel handle side portion of the first link plate is pivotally supported. Is formed with an operating portion on one side, a hook-shaped engaging portion on the other side, and a return operating portion for returning the operating plate to the engaging standby position. The operating plate and the first link plate are connected to the swing pivot point. In the sandwiched state, it is connected with a tension coil spring to urge the operation plate to the two positions of the engagement standby position and the unlocking position, and the engagement of the wheelbarrow with the engagement portion The rear wheel support member includes a latch that locks in the sitting position, and a return operation tool that acts on the return operation portion to return the operation plate to the engagement standby position when the wheelbarrow is folded and unlocked. It is the structure provided in.

  In addition, the handwheel is supported by the front wheel and the rear wheel, and the front wheel and the rear wheel are close to each other so that the handcart can be folded from the deployed position to the folded position, and the handcart is disposed on the frame of the handcart. In a folding lock device for a handcart provided with a lock device capable of locking and unlocking the unfolded posture of the wheelbarrow, an operation plate is pivotally supported by the frame of the handcart so that the operation plate can be unlocked. An operation portion for performing the operation, a hook-like engagement portion, and a return operation portion for returning the operation plate to the engagement standby position, with the operation plate and the frame sandwiching the swing pivot point of the operation plate, It is connected with a tension coil spring to urge the operation plate to the two positions of the engagement standby position and the lock release position, and it engages with the engagement portion. The wheelbarrow frame that locks the wheelbarrow in the unfolded position and the wheelbarrow frame that returns the operation plate to the hooking standby position when the wheelbarrow is unlocked and the wheelbarrow is folded. Is provided.

In the above configuration, the frame includes a connecting member that couples the front wheel supporting member supported by the front wheel and the rear wheel supporting member supported by the rear wheel to the hand handle, and swings the operation plate on the connecting member. The front wheel support member or the connecting member is pivotally supported so that the hooking tool is provided, and the return operation tool is provided on the rear wheel support member.

According to the folding lock device for a handcart according to the present invention, a seat portion having a handrest and a handwheel handle disposed behind the support portion are supported by the front wheel and the rear wheel, and the handrest or the front end portion of the seat portion. By constructing the wheelbarrow frame so that the wheelbarrow can be folded from the running position or the sitting position to the folded position by
In the wheelbarrow folding lock device in which the wheelbarrow frame is provided with a lock device capable of locking and unlocking the wheelbarrow running position or seating posture, the rear wheel is supported at the lower end portion, and the handwheel rests at the upper end portion. A rear wheel support member provided with a front wheel supported at the lower end, a front wheel support member whose upper end is pivotally supported at an intermediate height position of the rear wheel support member, and a lower end of the handwheel handle connected to the rear wheel support member The first link plate to be connected, the second link plate for connecting the lower end of the hand handle to the front wheel support member, and the hand handle and the lower part of the hand rest portion are connected above the second link plate to form a frame for the seat portion And a third link member that constitutes a wheelbarrow frame, and pivotally supports an operation plate having a swinging pivot point as a handwheel handle side portion of the first link plate. The operation plate has an operation portion on one side, a hook-shaped engagement portion on the other side, and a return operation portion for returning the operation plate to the engagement standby position. The operation plate and the first link plate are connected to the swing pivot. With the fulcrum pinched, it is connected with a tension coil spring to urge the operation plate to the two positions of the engagement standby position and the lock release position, and engage the engagement portion to lock the handcart in the running position or the sitting position. Since the rear wheel support member is provided with the hook and the return operation tool that acts on the return operation portion to return the operation plate to the hook standby position when the handcart is folded and unlocked, the handcart is provided. There is an advantage that the running posture or the sitting posture can be easily locked and unlocked without requiring labor.

  In addition, the handwheel is supported by the front wheel and the rear wheel, and the front wheel and the rear wheel are close to each other so that the handcart can be folded from the deployed position to the folded position, and the handcart is disposed on the frame of the handcart. In a folding lock device for a handcart provided with a lock device capable of locking and unlocking the unfolded posture of the wheelbarrow, an operation plate is pivotally supported by the frame of the handcart so that the operation plate can be unlocked. An operation portion for performing the operation, a hook-shaped engagement portion, and a return operation portion for returning the operation plate to the engagement standby position are formed, with the operation plate and the frame sandwiched between the swing pivot points of the operation plate, It is connected with a tension coil spring to urge the operation plate to the two positions of the engagement standby position and the lock release position, and it engages with the engagement portion. The wheelbarrow frame that locks the wheelbarrow in the unfolded position and the wheelbarrow frame that returns the operation plate to the hooking standby position when the wheelbarrow is unlocked and the wheelbarrow is folded. When it is provided, the deployed posture of the wheelbarrow can be easily locked and unlocked without requiring labor as in the case described above.

  The frame includes a connection member that couples a front wheel support member supported by the front wheel and a rear wheel support member supported by the rear wheel to a hand handle, and pivotally supports the operation plate on the connection member. If the front wheel support member or the connecting member is provided with a hook and the return operation tool is provided on the rear wheel support member, the deployed position of the wheelbarrow can be easily locked and locked in the same manner as described above. It can be canceled.

The best embodiment of the present invention will be described with reference to the drawings. 1 is a perspective view of a handcart provided with a folding lock device according to an embodiment of the present invention, FIG. 2 is a left side view of the handcart, and FIG. 3 is a left side of the handcart in a folded state. FIG. 4 and FIG. 6 are diagrams showing the operation of the folding lock device.
In each figure, a wheelbarrow 1 according to this embodiment is used by an elderly person when walking or sitting, and has a seat portion 3 having a handrest 2 and a handwheel handle disposed behind the seat portion 3. 4 is supported by a front wheel 8 and a rear wheel 9.

  This wheelbarrow 1 performs the operation of bringing the hand rest 2 or the front end portion of the seat portion 3 close to the hand handle 4 side, so that the folding posture shown in FIG. 3 is changed from the running posture or the sitting posture shown in FIGS. It can be folded in.

The frame 10 of the handcart 1 includes a rear wheel support member 11, a front wheel support member 12, a first link plate 13, a second link plate 14, and a third link member 15.
The rear wheel support member 11 supports the rear wheel 9 at the lower end, and the handrest 2 is provided at the upper end. The front wheel support member 12 supports the front wheel 8 at the lower end, and the upper end is the rear wheel support member. It is pivotally supported at 11 intermediate height positions.

The first link plate 13 is a member for connecting the lower end of the handwheel handle 4 to the rear wheel support member 11 and has a shape that is slightly curved in a dogleg shape in a side view, and the second link plate 14 A lower end of the hand handle 4 is provided to connect to the front wheel support member 12.
The third link member 15 connects the push handle 4 and the lower part of the handrest 2 portion above the second link plate 14 and forms a frame of the seat portion 3.

The frame 10 of the handcart 1 is provided with a lock device 20 that can lock and unlock the running posture or the seating posture of the handcart 1 shown in FIGS.
The locking devices 20 are provided on the left and right sides of the frame 10, respectively, and are connected by the interlocking rod 19 so as to be interlocked with each other and operate in the same manner. For convenience of explanation, one locking device will be described below.

As shown in FIG. 4, the locking device 20 includes an operation plate 21 pivotally supported by the first link plate 13, a latching tool 30 provided on the rear wheel support member 11, and a return operation tool 31.
The operation plate 21 is formed in a slightly deformed crescent shape when viewed from the side, and can be swung on the first link plate 13 with the hand handle 4 side portion that is one end of the first link plate 13 as a swing pivot point 26. It has a structure that is pivotally supported.

The operation plate 21 has an operation portion 22 at one tip (upper end), a hook-like hook portion 23 at a position slightly closer to the center than the other tip (lower end), and the other tip. Further, a hook-like return operation portion 24 for returning the operation plate 21 to the engagement standby position W is formed.
Further, the operation plate 21 and the first link plate 13 are connected with the swing pivot point 26 interposed therebetween, and the operation plate 21 is connected to the engagement standby position W in FIG. 4 and the lock release position K in FIG. A tension coil spring 25 is provided to bias the position.

  In consideration of strength and durability, the hook-like engaging portion 23 of the operation plate 21, the return operation portion 24, and the contact portion 27 that is the outer edge of the operation plate 21 between the engagement portion 23 and the return operation portion 24 are considered. The surface of a metal such as iron is plated, and the other part of the operation plate 21 is made of synthetic resin in consideration of aesthetics and weight reduction.

The hook 30 and the return operation tool 31 are formed in a shape protruding from the side of the rear wheel support member 11 so that the hook-shaped hook 23 and the return operation part 24 can be hooked.
The hooking tool 30 has a structure for hooking on the hooking portion 23 of the operation plate 21 to lock the handcart 1 in the traveling position or the sitting position shown in FIG. 2, and the return operating tool 31 is unlocked. Thus, when the handcart 1 is folded, it acts on the return operation portion 24 to return the operation plate 21 to the engagement standby position W.

  Further, as shown in FIGS. 1 and 2, the handcart 1 is provided with a brake 5 and a backrest 6, and further below the seat portion 3 is provided a storage bag 7 for storing luggage and the like. ing.

The operation of the folding lock device 20 of the handcart 1 configured as described above will be described below.
When the handcart 1 is traveling or sitting, the traveling posture or the sitting posture shown in FIGS.
At this time, as shown in FIG. 4, the operation plate 21 of the folding lock device 20 is in the engagement standby position W where the operation portion 22 is the upper end, and the engagement device 30 is in the engagement portion 23 in the engagement standby position W. It is related.
In addition, the pulling coil spring 25 is biased so that the hooking portion 23 does not come off the hooking tool 30, so that the handcart 1 is locked so as to be able to maintain the running posture or the sitting posture.
Thereby, the handcart 1 is not unexpectedly folded.

When folding the handcart 1, first, as shown in FIG. 5, the operation unit 22 is tilted forward (rightward in FIG. 5) to release the lock of the lock device 20, and the operation plate 21 is moved to the swing pivot. The fulcrum 26 is swung around the center of rotation.
As a result, the hooking part 23 comes off from the hooking tool 30, and then the return operation part 24 part comes into contact with the return operating tool 31.

In a state where the return operation unit 24 is engaged with the return operation tool 31, the tension coil spring 25 is biased so that the hook of the return operation unit 24 does not come off from the return operation tool 31, and the operation plate 21 is held at the unlock position K. Therefore, even if the user releases his hand from the operation unit 22, the operation plate 21 remains in the unlocked position K and does not return to the engagement standby position W shown in FIG.
As described above, when unlocking the running posture or the sitting posture of the handcart 1, it is only necessary to perform the operation of once tilting the operation portion 22 of the operation plate 21 urged by the tension coil spring 25 forward. Can be easily unlocked.

  When the axis C of the tension coil spring 25 exceeds the swing pivot point 26 of the operation plate 21 as shown in FIG. 5 by the operation of tilting the operation portion 22 forward once, the operation plate 21 is moved by the tensile force of the tension coil spring 25. The return operation portion 24 of the operation plate 21 is received in a state of contacting the return operation tool 31 with the swing pivot point 26 as the rotation center.

Then, by performing the folding operation of the handcart 1, the first link plate 13 swings leftward in FIG. 5 with the rear wheel support member 11 side portion of the first link plate 13 as the swing pivot point 28. Accordingly, the hand handle 4 moves backward toward the rear wheel 9 side.
At this time, the return operation tool 31 acts in a direction to push up the return operation unit 24.
As a result, as shown in FIG. 6, the operation plate 21 swings counterclockwise around the swinging pivot branch 26, but the hooking portion 23 is pulled out backward without being hooked to the hooking tool 31. The abutting portion 27 moves backward while being in contact with the lower surface or the rear side surface of the hooking tool 30.

  As shown in FIG. 3, when the handrest 2 or the front end portion of the seat portion 3 is brought closest to the hand handle 4 side, the operation portion 22 of the operation plate 21 is moved to the rear wheel support member 11 as shown in FIGS. And the operation unit 22 is located below the swing pivot point 26, and the operation of folding the handcart 1 is completed.

At this time, the return operation portion 24 of the operation plate 21 includes a four-link mechanism formed by the handle 4, the rear wheel support member 11, the second link plate 14, and the third link plate 15, and a handle of the four-link mechanism. From the state in which the lower end portion of 4 is in contact with and received by the return operation tool 31 when the handcart 1 is folded by the action of the first link plate 13 that connects the lower wheel support member 11 to the rear wheel support member 11. It will be in a state of going away.
Further, when the return operation unit 24 that is in contact with the return operation tool 31 moves away from the return operation tool 31 by this unlocking operation, the return operation tool 31 is operated via the return operation unit 24 to operate the operation plate 21. Is swung counterclockwise.
When the axial center C of the tension coil spring 25 crosses the swing pivot point 26 of the operation unit 22 leftward in FIG. 5, the operation plate 21 rotates the swing pivot point 26 about the pivot point 26 by the pulling force of the tension coil spring 25. To return from the unlocking position K to the lock standby posture.

  Therefore, the return operation tool 31 has only one operation for releasing the lock. After the lock is released, when the wheelbarrow is folded, the return operation tool 31 acts on the return operation unit 24 to retract the operation plate 21. It is possible to return to the engagement standby position W.

Next, when shifting the handcart 1 shown in FIG. 3 from the folded state to the traveling posture or the seating posture shown in FIG. 1, the handrest 2 or the front end portion of the seat portion 3 is separated from the handwheel handle 4. Press down in the direction.
As a result, the operation plate 21 of the locking device 20 rotates the swing pivot 26 while the abutting portion 27 abuts against the lower surface of the engaging tool 30 while being urged by the tension coil spring 25, contrary to the folding operation. Swings forward as the center.
And the hook of the engaging part 23 engages with the protrusion of the engaging tool 30, and the state which developed the handcart 1 is locked by this.

As described above, the locking device 20 of the handcart 1 according to the present embodiment only needs to tilt the operation unit 22 while being biased by the tension coil spring 25 when unlocking the running posture or the sitting posture. Can be unlocked easily.
Further, since the operation plate 21 automatically returns to the engagement standby position W by the folding operation of the handcart, it can be very easily returned to the lock standby state without any effort.

Further, when the handcart 1 is expanded from the folded state, the traveling posture or the seating posture is locked at the same time as the operation of unfolding the handcart 1, so that another operation for locking is not required. Can be locked automatically.
Therefore, since the row posture or the sitting posture of the handcart 1 is not locked, the handcart 1 is not unexpectedly folded, and the safety of the handcart 1 can be improved.

  In the above-described embodiment, the operation plate 21 is pivotally supported by using the portion of the first link plate 13 on the side of the hand handle 4 as a swing pivot point 26 so that the latching tool 30 and the return operation tool 31 are moved rearward. Although the wheel support member 11 has a structure provided in the wheel support member 11, the folding lock device for the wheelbarrow of the present invention is not limited thereto, and the operation plate is pivotally supported at other places of the wheelbarrow frame so as to be swingable. Also good. Further, although the hooking tool 30 and the return operating tool 31 are provided on the rear wheel support member 11, they may be provided at other positions on the handcart frame. And the frame 10 structure of the handcart 1 is not limited to the structure of the said embodiment, For example, the structure shown in FIG. 8 may be sufficient.

  FIG. 8 is a perspective view of a handcart according to another embodiment of the present invention, and FIG. 8A is a diagram viewed from the diagonally left front and FIG. 8B is a diagram viewed from the diagonally rear left. 8, the frame 10a of the handcart 1a has a handwheel 4a supported by a front wheel 8a and a rear wheel 9a, and the front wheel 8a and the rear wheel 9a are brought close to each other, thereby moving the handcart 1a from the deployed position to FIG. It is comprised so that it may fold to the folding attitude | position shown.

The frame 10a of the handcart 1a includes a connecting member 29 that supports the handwheel 4a so as to be slidable up and down. The connecting member 29 is supported by a front wheel support member 12a and a rear wheel 9a supported by the front wheel 8a. The rear wheel support member 11a is pivotally supported so that the front wheel support member 12a and the rear wheel support member 11a are coupled to the hand handle 4a.
Further, the intermediate height position between the front wheel support member 12a and the rear wheel support member 11a is connected to the lower end portion of the hand handle 4a by a half-broken link 30, and is shown in FIG. 8 by the sliding operation of the hand handle 4a downward. As shown in FIG. 9, the broken link 30 is deformed to be bent at the central portion in the longitudinal direction pivotally supported by the lower end of the hand handle 4a, and the front wheel 8a and the rear wheel 9a are brought close to each other. It is like that.

As shown in FIG. 8B, the operation plate 21a is pivotally supported on the inner side surface of the connecting member 29 so as to be swingable.
10A and 10B are enlarged views of the operation plate 21a. The operation plate 21a is formed with an operation portion 22a for performing unlocking operation, a hook-like engagement portion 23a, and a hook-like return operation portion 22a for returning the operation plate 21a to the engagement standby position K.
As shown in FIG. 8B, the operation portion 22a is configured by a hollow tube constructed so as to connect the left and right operation plates 21a.

  The tension coil spring 25a connects the operation plate 21a and the connecting member 29 of the frame 10a with the swing pivot point 26a of the operation plate 21a interposed therebetween, and connects the operation plate 21a between the engagement standby position W and the unlocking position K. Energized in two positions.

The frame 10a of the handcart 1a has a hook 30a that is hooked on the hook portion 23a to lock the handcart 1a in the unfolded position, and a return operation portion 22a when the handcart 1a is folded and unlocked. A return operation tool 31a is provided that acts to return the operation plate 21a to the engagement standby position K.
In FIG. 10, the hooking tool 30a is formed below the connecting position of the connecting member 29 of the hand handle 4a, and shows a structure in which a hollow tube is installed on the leg portions of the pair of left and right hand press handles 4a. Although an example is shown in which the rear wheel support member 11a is protruded above, the hooking tool may be provided on the front wheel support member 12a instead of the push handle 4a, or may be provided at another place on the frame 10a. Further, the return operation tool 31a may be provided in another place of the frame 10a instead of the rear wheel support member 11a.

The wheelbarrow 1a is locked in a deployed posture in the state shown in FIG. That is, the engagement standby position W where the engagement portion 23a is engaged with the engagement tool 30a is urged by the tension coil spring 25a.
Then, when unlocking the handcart 1a, the operation plate 21a is rotated clockwise in FIG. 10 (a) by performing an operation of pulling up the operation portion 22a from the locked state shown in FIG. 10 (a). As shown in FIG. 10B, the return operation unit 22a is engaged with the return operation tool 31a, and the unlocking position K in a state where the return operation unit 22a is engaged with the return operation tool 31a is pulled. Energized by 25a.
When reaching from the engagement standby position W to the lock release position K, the axial center C of the tension coil spring 25 exceeds the swing pivot point 26a of the operation plate 21a.

Thereafter, the middle link 30 is broken by performing an operation of depressing the hand handle 4a, whereby the front wheel support member 12a and the rear wheel support member 11a approach each other and the hand cart 1a is folded.
At that time, as shown by an arrow Y in FIG. 10B, the rear wheel support member 11a swings counterclockwise about the connecting member 29 as a center of rotation, and the return operation tool 31a is moved by the operation plate 21a. The return operating portion 24a is swung counterclockwise.

Eventually, when the return operation portion 22a is detached from the return operation tool 31a and the axis C of the tension coil spring 25a exceeds the swing pivot point 26a, the tension coil spring 25a swings the operation plate 21a counterclockwise in FIG. Energize.
At this time, since the hand handle 4a has moved downward, the latching tool 30a has moved downward from the latching standby position W. Therefore, the contact part 27a contacts the rear side surface of the engagement tool 30a without engaging the engagement part 23a with the engagement tool 30a, and the handcart 1a is further folded.

  Accordingly, the lock can be easily released only by operating the operation unit 22a, and the handcart 1a can be folded by pushing down the handwheel handle 4a.

It is a perspective view of the handcart which concerns on one Embodiment of this invention. It is a left view of the said handcart. It is a left view of the state which folded the said handcart. It is a figure which shows operation | movement of the locking apparatus of the said handcart. It is a figure which shows operation | movement of the locking apparatus of the said handcart. It is a figure which shows operation | movement of the locking apparatus of the said handcart. It is a figure which shows operation | movement of the locking apparatus of the said handcart. It is a perspective view of the handcart which concerns on other embodiment of this invention. It is a left view of the state which folded the said handcart. It is a figure which shows operation | movement of the locking apparatus of the said handcart.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1a Wheelbarrow 2 Hand rest 3 Seat 4, 4a Hand handle 8, 8a Front wheel 9, 9a Rear wheel 10 Frame 11, 11a Rear wheel support member 12, 12a Front wheel support member 13 First link plate 14 Second link plate 15 Third link member 20, 20 a Lock device 21, 21 a Operation plate 22, 22 a Operation part 23, 23 a Engagement part 24, 24 a Return operation part 25 Tension coil spring 30, 30 a Engagement tool 31, 31 a Return operation tool

Claims (3)

  A seat with a handrest and a handwheel disposed behind it are supported by the front and rear wheels, and the handwheel is driven by operating the handrest or the front end of the seat to the handwheel side. A wheelbarrow comprising a wheelbarrow frame that can be folded from a posture or a sitting posture to a folded posture, and provided with a lock device capable of locking and unlocking the wheelbarrow in a traveling position or a seating position. In the folding lock device, the rear wheel is supported at the lower end, the rear wheel support member is provided with a handrest at the upper end, the front wheel is supported at the lower end, and the upper end is at an intermediate height position of the rear wheel support member. A front wheel support member that is pivotally supported, a first link plate that connects the lower end of the handwheel handle to the rear wheel support member, and a lower end of the handwheel handle that supports the front wheel A second link plate to be connected to the material, and a third link member for connecting the hand handle and the lower part of the hand rest portion above the second link plate to form a frame for the seat, The operation plate is pivotally supported with the handwheel handle side portion of the first link plate as a pivot point. The operation plate has an operation part on one side and a hook-shaped engagement part on the other side. A return operation portion for returning the plate to the engagement standby position, and the operation plate and the first link plate are connected to each other by a tension coil spring in a state where the swing pivot point is sandwiched between the operation plate and the engagement standby position. Engage the two positions of the lock release position, engage the hooking part to lock the wheelbarrow in the running position or sitting position, and the wheelbarrow is folded when the lock is released Wheelbarrow folding locking device, characterized in that provided on the rear wheel-supporting member and the return operation member for returning the operating plate acts on engagement stand-by position in the return operation unit when it is operated. The wheelbarrow is supported by the front wheel and the rear wheel, and the wheelbarrow can be folded from the deployed position to the folded position by bringing the front wheel and the rear wheel close to each other, and the wheelbarrow is deployed on the frame of the wheelbarrow. In a handcart folding lock device provided with a lock device capable of locking and unlocking a posture, an operation plate is pivotally supported on a frame of the handcart so that the operation plate is unlocked. An operating part, a hook-like engaging part, and a return operating part for returning the operating plate to the engaging standby position are formed, and the tension coil spring is in a state where the operating plate and the frame are sandwiched between the swing pivot points of the operating plate. To connect the operation plate to the engagement standby position and the unlocking position, and engage the engagement portion with the hand. The wheelbarrow frame includes a latch that locks the wheel in the unfolded position, and a return operation tool that acts on the return operation unit when the wheelbarrow is folded and unlocked to return the operation plate to the latch standby position. A folding lock device for a wheelbarrow characterized by being provided in the above. The frame includes a connecting member that slidably connects a front wheel supporting member supported by the front wheel and a rear wheel supporting member supported by the rear wheel to the hand handle so that the operation plate can swing on the connecting member. The folding lock device for a handcart according to claim 2, wherein the front wheel support member or the connecting member is pivotally supported, and the return operation tool is provided on the rear wheel support member.

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