JP4852567B2 - Wheelbarrow folding lock device - Google Patents

Wheelbarrow folding lock device Download PDF

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Publication number
JP4852567B2
JP4852567B2 JP2008122341A JP2008122341A JP4852567B2 JP 4852567 B2 JP4852567 B2 JP 4852567B2 JP 2008122341 A JP2008122341 A JP 2008122341A JP 2008122341 A JP2008122341 A JP 2008122341A JP 4852567 B2 JP4852567 B2 JP 4852567B2
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operation
wheelbarrow
portion
rear wheel
position
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JP2009269495A (en
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龍彦 島
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株式会社島製作所
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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, a wheelbarrow is used by elderly people 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 relating to a brake device for a wheelbarrow brake that can reliably maintain a braked state.

JP 2006-282038 A

However, the pushcart, there is no disclosure about the pushcart traveling posture or sitting posture lock and lock releasable locking device, the running posture or sitting posture of the wheelbarrow, easily by simple operation without requiring troublesome lock 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. 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 operating the tip side portion of the seat portion toward the handwheel handle, the wheelbarrow is configured on 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, It includes a third link member forming a base frame, and constitutes the wheelbarrow frame, the operation plate swingably to pivotally support the hand handle portion of the first link plate and the swing pivot point, 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. Connected by a tension coil spring with the fulcrum sandwiched between them, the operation plate is urged to the two positions of the engaging standby position and the unlocking position, and the wheelbarrow is engaged with the engaging part. Alternatively, the rear wheel support member includes a latch that locks in the seating posture and a return operation tool that acts on the return operation portion when the handcart is folded and the folding operation is performed to return the operation plate to the engagement standby position. Provided on the outer edge of the operation plate between the hooking part and the return operating part is a structure that is provided with a contact part that can come into contact with the hooking tool when the handcart is folded and when it is shifted to the running position or the sitting position. It is.

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 wheel, a front wheel support member supported by a front wheel and a rear wheel support member supported by a rear wheel, the frame of the handcart And a connecting member that slidably supports the hand handle and slidably connects the front wheel support member and the rear wheel support member to the hand handle, and a front wheel at a lower end portion of the hand handle. A half-broken link that connects intermediate height positions of the support member and the rear wheel support member is provided, and the operation plate is pivotally supported by the connection member so as to be swingable. The operation plate is formed with an operation portion for performing unlocking operation, a hook-shaped engagement portion, and a return operation portion for returning the operation plate to the engagement standby position, and the operation plate and the frame are moved to swing the operation plate. Engagement with a tension coil spring to urge the operation plate to the two positions of the engagement standby position and the unlocking position while holding the pivot point, and to engage the engagement portion to lock the handcart in the deployed position The tool is provided on the handwheel handle, and when the wheelbarrow is unlocked and the wheelbarrow is folded, a return operation tool is provided on the rear wheel support member that acts on the return operation part to return the operation plate to the engagement standby position. The outer edge of the operation plate between the return operation portion and the return operation portion has a contact portion that can contact the hook when the handcart is folded and moved to the running posture or the sitting posture. Those digits.

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. 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 wheelbarrow to the side of the handwheel handle, and the wheelbarrow is configured to have a traveling position or a seating position on the wheelbarrow frame. In the folding lock device of the handcart provided with a lock device that can be locked and unlocked, the rear wheel is supported on the lower end, the rear wheel support member provided with the back on the upper end, and the front wheel is supported on 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 are connected to the rear wheel support member. A first link plate, a second link plate that connects the lower end of the handwheel handle to the front wheel support member, and a second handle that connects the handwheel handle and the lower part of the handrest portion above the second link plate to form a seat frame includes three link members, and constitutes a wheelbarrow frame is swingably pivotally supported operating plate the hand handle portion of the first link plate and the swing pivot point, in one of which the operating plate The operation part is formed with a hook-like engagement part on the other side and a return operation part for returning the operation plate to the engagement standby position, with the operation plate and the first link plate sandwiched between the swing pivot points. The operation plate 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 wheelbarrow is engaged with the engagement portion to travel or sit down. And engagement device for locking, 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 portion when wheelbarrow lock is released is folding operation, the fitting part Since the outer edge of the operation plate between the return wheel and the return operation portion is provided with a contact portion that can come into contact with the hook when the wheelbarrow is folded and moved to the running posture or the seating posture , the wheelbarrow travels. There is an advantage that the 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 wheel, a front wheel support member supported by a front wheel and a rear wheel support member supported by a rear wheel, the frame of the handcart And a connecting member that slidably supports the hand handle and slidably connects the front wheel support member and the rear wheel support member to the hand handle, and a front wheel at a lower end portion of the hand handle. A half-broken link that connects intermediate height positions of the support member and the rear wheel support member is provided, and the operation plate is pivotally supported by the connection member so as to be swingable. The operation plate is formed with an operation portion for performing unlocking operation, a hook-shaped engagement portion, and a return operation portion for returning the operation plate to the engagement standby position, and the operation plate and the frame are moved to swing the operation plate. Engagement with a tension coil spring to urge the operation plate to the two positions of the engagement standby position and the unlocking position while holding the pivot point, and to engage the engagement portion to lock the handcart in the deployed position The tool is provided on the handwheel handle, and when the wheelbarrow is unlocked and the wheelbarrow is folded, a return operation tool is provided on the rear wheel support member that acts on the return operation part to return the operation plate to the engagement standby position. The outer edge of the operation plate between the return operation portion and the return operation portion has a contact portion that can contact the hook when the handcart is folded and moved to the running posture or the sitting posture. If digits, the deployment attitude of the the wheelbarrow Similarly, it is possible to easily lock and unlock without requiring troublesome.

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.
Incidentally, the locking device 20 is provided on each of the left and right frames 10, so that the effect similar are connected by the interlocking rod 19 to work it, et al and, for convenience of explanation, below one of the locking device described To do.

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 is swung counterclockwise as rotation about the Yuradokururu支point 26, the fitting part 23 without engaging the engaging member 30, exit to the rear Thus, the contact portion 27 moves backward while contacting 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, without wheelbarrow 1 will be folded against the will to run lines posture or sitting posture of the hand truck 1 is not locked, it is possible to improve the safety of the barrow 1.

  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. An operation section 22a to perform an operation of unlocking the operating plate 21a, a hook-shaped engaging portion 23a, the operating plate 21a of the hook-shaped return operation unit 24 a for returning the engagement stand-by position K is formed.
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 wheelbarrow 1a, a engaging member 30a for locking the push chair 1a in the deployed position to engage the engaging portion 23a, the return operation unit 24 a when the lock is barrow 1a is released is folding operation It is provided a return operation member 31a for returning the operating plate 21a acts on the engagement stand-by position K to.

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.
When the handcart 1a is unlocked, the operation plate 21a is rotated clockwise in FIG. 10A by performing an operation of pulling up the operation portion 22a from the locked state shown in FIG. swings, while engaging the return operation member 31a to return the operation unit 24 a as shown in FIG. 10 (b), the lock release position K is a state of engaging the return operation unit 24 a to the return operation member 31a It is urged by the tension coil spring 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 around the connecting member 29 as a center of rotation, and the return operation tool 31a is accordingly moved to the operation plate 21a. The return operating portion 24a is swung counterclockwise.

Eventually, out return operation unit 24 a from the return operation member 31a, the axis C of the tension coil spring 25a to swing the the tension coil spring 25a is operating plate 21a exceeds swinging pivot point 26a in the counterclockwise direction in FIG. 9 orientation Energize to.
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 (2)

  1. 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 in which a wheelbarrow frame is configured to be foldable from a posture or a seating posture into a folded posture, and the wheelbarrow frame is provided with a lock device capable of locking and unlocking the wheelbarrow in a running posture or a seating posture. In the folding lock device of
    A rear wheel support member that supports the rear wheel at the lower end and has a backrest at the upper end;
    A front wheel supporting member supported at the lower end, and an upper end portion pivotally supported at an intermediate height position of the rear wheel supporting member;
    A first link plate that connects the lower end of the handwheel handle to the rear wheel support member;
    A second link plate for connecting the lower end of the push handle to the front wheel support member;
    A third link member that connects the push handle and the lower portion of the hand rest portion above the second link plate to form a frame of the seat portion;
    Comprising a wheelbarrow frame,
    The operation plate with the handwheel handle side portion of the first link plate as the pivot point is pivotally supported.
    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.
    With the operation plate and the first link plate sandwiched between the swing pivot points, the operation plate 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,
    A latch that engages the hook and locks the wheelbarrow in the running position or seated position, and when the wheelbarrow is folded and unlocked, it acts on the return operation unit to return the operation plate to the hook standby position. A return operation tool is provided on the rear wheel support member, and the outer edge of the operation plate between the engagement portion and the return operation portion is applied to the engagement device when the wheelbarrow is folded and when the wheelbarrow is moved to the running position or the sitting position. Provided a contact part that can contact,
    A folding lock device for a wheelbarrow characterized by that.
  2. 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 the posture,
    A frame of the handcart supports a front wheel support member supported by a front wheel, a rear wheel support member supported by a rear wheel, a handwheel handle so as to be slidable up and down, and a front wheel support member and a rear wheel support supported by the handwheel handle. A connecting member that connects the member so as to be able to swing, and a lower end portion of the hand handle, and a middle broken link that connects an intermediate height position of the front wheel support member and the rear wheel support member,
    The operation plate is pivotally supported by the connecting member so as to be able to swing,
    The operation plate is formed with an operation portion for performing unlocking operation, a hook-shaped engagement portion, and a return operation portion for returning the operation plate to the engagement standby position,
    With the operation plate and the frame sandwiched between the swing pivot points of the operation plate, the operation plate is connected by a tension coil spring to urge the operation plate to two positions, the engagement standby position and the unlocking position,
    A hooking tool that locks the handcart in the deployed position by engaging with the hook is provided on the handwheel handle, and when the handcart is folded and unlocked, it acts on the return operation section to bring the operation plate to the hook standby position. A return operation tool for returning is provided on the rear wheel support member, and the outer edge of the operation plate between the engagement portion and the return operation portion is applied to the engagement device when the wheelbarrow is folded and when it is shifted to the running position or the sitting position. Provided a contact part that can contact,
    A folding lock device for a wheelbarrow characterized by that.
JP2008122341A 2008-05-08 2008-05-08 Wheelbarrow folding lock device Active JP4852567B2 (en)

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JP2008122341A JP4852567B2 (en) 2008-05-08 2008-05-08 Wheelbarrow folding lock device

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Application Number Priority Date Filing Date Title
JP2008122341A JP4852567B2 (en) 2008-05-08 2008-05-08 Wheelbarrow folding lock device

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JP2009269495A JP2009269495A (en) 2009-11-19
JP4852567B2 true JP4852567B2 (en) 2012-01-11

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JP5589366B2 (en) 2009-11-27 2014-09-17 ソニー株式会社 Information processing apparatus, information processing method, and program thereof
JP5963630B2 (en) * 2012-09-26 2016-08-03 アップリカ・チルドレンズプロダクツ合同会社 Wheelbarrow lock mechanism

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