JP2018167788A - Handcart - Google Patents

Abstract

To provide a handcart, surely and safely brakable in braking time, by easily executing direction conversion and small turning in ordinary travel time, by freely turning the whole four wheels.SOLUTION: A wheel 8 freely turnable around a vertical turning axis comprises a longitudinally-laterally installed loading space member 1, and a V-shaped member 7 is provided along a bottom surface 1b of the loading space member 1, and the V-shaped member 7 is arranged in a central area of the bottom surface 1b in a crossing-shaped base end part 7b, and the respective tip parts 7a and 7a are arranged in an upper position of the respective wheels 8 and 8 on the rear side, and the crossing-shaped base end part 7b of the V-shaped member 7 rises by receiving operation force transmitted from an operation force transmitting flexible wire rod 4 for installing one end part 4a on a brake lever 31, and a link mechanism 5 is provided for interlocking-connecting the other end part 4b of the flexible wire rod 4 and the crossing-shaped base end part 7b of the V-shaped member 7 so that the respective tip parts 7a and 7a descend, and is also provided with a slide member pressed downward by descent of the tip part 7a of the V-shaped member 7 and a friction member brought into pressure contact with an outer peripheral surface of the rear side wheel 8 by descent of the slide member.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a handcart.

  Conventionally, handcarts used for shopping, walking assistance, etc., are used for transmitting a maneuvering member having wheels mounted on the front, rear, left and right, a handle member having a brake lever, and an operating force transmitted to one end of the brake lever. A flexible wire, and a U-shaped brake swinging member pivotally attached to the lower rear portion of the cargo bed member, to which the other end of the flexible wire is attached, and is transmitted from the flexible wire. There is a configuration in which each rocking tip portion (friction portion) of the rocking member is brought into pressure contact with the outer peripheral surface of each wheel on the rear side for braking by an operating force (for example, see Patent Document 1).

JP 2012-17004 A

  However, in the conventional handcart described above, the friction part of the swinging member pivotally attached to the loading platform is pressed against the outer peripheral surface of the rear wheel, so that the rear wheel can be turned around the vertical axis. There is a problem that it is difficult to change the direction of the wheelbarrow and make a small turn.

  Accordingly, an object of the present invention is to provide a handcart that can turn all four wheels freely and can easily change the direction and make a small turn during normal traveling, and can reliably and safely brake during braking.

In order to achieve the above object, a handcart according to the present invention includes a cargo bed member to which wheels capable of turning around a vertical pivot axis are attached to the front, rear, left and right, and has a V-shape along the bottom surface of the cargo bed member. The V-shaped member has a cross-shaped base end portion disposed in a central region of the bottom surface, and each distal end portion disposed above the wheel on the rear side. In response to the operating force transmitted from the operating force transmitting flexible wire having one end attached to the brake lever, the cross-shaped base end of the V-shaped member rises and the tip ends descend. As described above, a link mechanism for interlockingly connecting the other end portion of the flexible wire and the cross-shaped base end portion of the V-shaped member is further pressed downward by the lowering of the distal end portion of the V-shaped member. The slide member is pressed against the outer peripheral surface of the wheel on the rear side when the slide member is lowered. Friction and the member, those having a.
The slide member is disposed coaxially with the pivot axis.

  According to the present invention, it is possible to reliably and safely brake the handcart while making all four wheels turnable (casters). Direction change (change of course) and small turn can be performed easily and smoothly.

It is the perspective view which showed one Embodiment of this invention and was seen from the side surface. It is the perspective view seen from the bottom face. It is a principal part perspective view, Comprising: (a) is a perspective view of the member connected with the link mechanism and a link mechanism, (b) is a perspective view of a V-shaped member. It is a principal part sectional side view. It is a simplified top view for demonstrating a use condition, Comprising: (a) is a simplified plan view of a right-hand use structure, (b) is a simplified plan view of a left-hand use structure.

Hereinafter, the present invention will be described in detail based on illustrated embodiments.
As shown in FIG. 1, a storage member 9 such as a shopping bag, a shopping bag, a case, or the like is placed on a horizontal load receiving surface (upper surface) 1 a, and upper and lower erected on the carrier member 1. A pair of front and rear support strut members 2, 2, a top end of the pair of support strut members 2, 2 connected in the front-rear direction and a handle member 3 having a brake lever 31, and one end at the tip of the brake lever 31 4a, and a flexible wire 4 for operating force transmission to which 4a is attached.
And the wheel 8 which can be swiveled around the vertical turning axis L8 is attached to the loading platform member 1 to front and rear, right and left (four corners).

The flexible wire 4 is inserted through the inside of the handle casing 30 of the handle member 3 and the inside of the support member 2 on the rear side, and the other end toward the bottom surface 1b side of the platform member 1 as shown in FIG. Part 4b is introduced.
When the brake lever 31 is gripped (gripped) together with the handle casing 30, the flexible wire 4 is pulled up at one end 4a and the other end 4b exerts a pulling force.

The flexible wire 4 is a metal wire and is protected and guided by the guide tube 40. Specifically, the flexible wire 4 is an inner wire of the push-pull wire W, and the guide tube 40 is an outer wire of the push-pull wire W.
The flexible wire 4 and the guide tube 40 are changed in direction by approximately 90 degrees from a vertical hanging posture in the column member 2 by a guide portion such as a guide wall portion and a guide hole portion provided on the bottom surface 1b of the loading platform member 1, It has a horizontal posture and is further provided with a bent portion such as a U-turn portion.

  And the V-shaped member 7 which has a left-right paired arm part arrange | positioned in V shape along the bottom face 1b of the loading platform member 1 is provided. A cross-shaped base end 7b of the V-shaped member 7 is disposed in the central region of the bottom surface 1b.

As shown in FIGS. 2 to 4, the V-shaped member 7 is attached to the bottom surface 1b by supporting the arm intermediate portion 7c in a suspended manner with a predetermined vertical gap from the bottom surface 1b of the loading platform member 1. It is worn. The distal end portion 7a and the cross-shaped base end portion 7b are swingable in a vertical seesaw shape with the arm intermediate portion 7c (suspended support portion) as a fulcrum.
And the front-end | tip parts 7a and 7a of the V-shaped member 7 are arrange | positioned in the upper position of each wheel 8 and 8 of the back side.

The V-shaped member 7 is formed by connecting (connecting) base end portions 70b, 70b of two circular pipe-shaped arm members 70, 70 arranged in a V-shape by bolt members and nut members.
The base end portion 70b of the arm member 70 is a vertical plate shape plastically processed (plastically deformed) from a circular shape, and the distal end portion 70a of the arm member 70 is a horizontal plate shape plastically processed from a circular shape.
The cross-shaped base end portion 7b of the V-shaped member 7 only needs to be close to the base end portions 70b and 70b of the pair of arm members (arm portions) 70 and 70. That is, it is not necessary to cross or connect to each other.
The V-shaped member 7 is formed by integrating the base end portions 70b, 70b of the two arm members 70, 70 by welding, by bending one saddle member or plate member, The material can be freely punched in a V-shape or a combination of a plurality of members.

Further, a link mechanism 5 that interlocks and connects the cross-shaped base end portion 7 b of the V-shaped member 7 and the other end portion 4 b of the flexible wire 4 is provided on the bottom surface 1 b of the loading platform member 1.
The link mechanism 5 is configured to raise the cross-shaped base end portion 7 b of the V-shaped member 7 when receiving an operating force (tensile force) transmitted from the flexible wire 4.

  3A, the link mechanism 5 has an L-shape in which the other end portion 4b of the flexible wire 4 is fixed to the one end portion 51a and the intermediate portion 51c is pivotally supported by a horizontal shaft member 53. -Like swing member 51 and a vertically moving member whose lower end is pivotally attached to the other end 51b of the swing member 51 and whose upper end is pivotally attached to the cross-shaped base end 7b of the V-shaped member 7. 52.

  The swing member 51 is provided so that when the one end 51a is pulled rearward by the flexible wire 4, the other end 51b swings up and swings around the shaft member 53 (left and right horizontal axis L53).

The vertically moving member 52 is provided so as to push up the cross-shaped base end portion 7b when the other end portion 51b of the swinging member 51 rises.
Further, the upper end portion of the vertically moving member 52 is disposed between the base end portions 70 b and 70 b of the pair of arm members 70 and 70 forming the V-shaped member 7, and the base ends of the pair of arm members 70 and 70. A bolt member for connecting the portions 70b and 70b is inserted so as to be pivotally attached to the cross-shaped base end portion 7b.

Both end portions of the shaft member 53 are attached (supported) to a pair of left and right shaft support portions 13, 13 provided in a hanging manner on the bottom surface 1 b of the loading platform member 1.
Note that the loading platform member 1 supports a pair of left and right shaft support portions 13D and 13D that support both ends of the shaft member 53 in the right-hand use configuration described later, and supports both ends of the shaft member 53 in the left-hand use configuration described later. And a pair of left and right shaft support portions 13C and 13C (see FIG. 2).

Further, as shown in FIGS. 2 and 3A, when the operation of the brake lever 31 is released, the V-shaped member 7 and the link mechanism 5 (the swinging member 51 and the vertically moving member 52) are connected to each other in a predetermined manner. A return bullet urging member 59 for returning to the braking standby posture is provided.
The return bullet urging member 59 is a tension coil spring, one end of which is attached to the swinging member 51 (one end 51a thereof) and the other end is attached to the carrier member 1.
It always urges and urges one end 51a of the swinging member 51 so as to draw it forward.

Next, as shown in FIG. 4, a vertically movable slide member 81 disposed coaxially with the turning axis L8 of the rear wheel 8 at a position below the tip 7a of the V-shaped member 7. Is provided.
The slide member 81 has a shaft shape, and is provided such that the upper end portion is pressed by the lowering of the tip end portion 7a of the V-shaped member 7 and moves downward.
The slide member 81 is inserted through a cylindrical turning reference shaft 89 disposed coaxially with the turning axis L8.
Further, a return spring 83 comprising a coil spring for returning the slide member 81 to a predetermined upper position (braking standby position) when the lever is not operated by the V-shaped member 7 receiving no operating force is provided.

  The turning reference shaft 89 is attached to a base member 88 attached to the loading platform member 1 in a suspended manner. A wheel support member 86 is attached to the turning reference shaft 89 in a fitting manner via a turning bearing member 87 such as a bearing. That is, the wheel support member 86 is attached to the base member 88 so as to be turnable around the turning axis L8.

The wheel support member 86 has a bifurcated shape having a pair of left and right support pieces that support the rear wheel 8 so as to roll freely (both ends of the axle 85 of the wheel 8).
Then, a plate spring-like friction member 82 is attached to the wheel support member 86 in a cantilever shape so as to be pressed against the outer peripheral surface of the rear wheel 8 when the slide member 81 is lowered.
In the lever non-operating state, the friction member 82 is separated from the outer peripheral surface of the wheel 8 (by its own elastic urging force).

That is, when the user operates the brake lever 31, the one end 4a of the flexible wire 4 is pulled upward, and the other end 4b of the flexible wire 4 is guided by the guide portion of the bottom surface 1b of the load carrier member 1 (guide). ) To move backward horizontally.
The other end portion 4b of the flexible wire 4 moves one end portion 51a of the swinging member 51 rearward against the elastic urging force of the return bullet urging member 59, and the other end portion 51b is horizontally horizontal. Swings upward around the center axis L53.

As the other end portion 51 b of the swing member 51 swings upward, the vertical movement member 52 moves upward, and the vertical movement member 52 pushes up the cross-shaped base end portion 7 b of the V-shaped member 7.
In the V-shaped member 7, the cross-shaped base end portion 7 b rises and the tip end portions 7 a, 7 a descend, and the slide members 81 corresponding to the rear wheels 8, 8 are moved by the elastic force of the return spring 83. Press against the energizing force.

The lower end portion of the slide member 81 presses the friction member 82 against the spring force (elastic urging force) of the friction member 82 and presses it against the outer peripheral surface of the rear wheel 8. The rotation of the rear wheel 8 is braked (the brake is applied) by the frictional force of the friction member 82.
Since the rear wheel 8 and the friction member 82 pivot together (together) around the axis (slewing axis L8) of the slide member 81, the lower end of the slide member 81 is A predetermined pressure receiving portion of the friction member 82 can be pressed, and the friction member 82 can reliably press the friction applying portion to the outer peripheral surface of the wheel 8. That is, the V-shaped member 7 can brake the left and right wheels 8 and 8 on the rear side simultaneously (without time difference).

When the user releases the operation of the brake lever 31, the swinging member 51 returns to the predetermined braking standby state (position before the lever operation) by the elastic urging force of the return bullet urging member 59, The vertically moving member 52 and the cross-shaped base end portion 7b are lowered, the tip end portion 7a of the V-shaped member 7 is raised, and the link mechanism 5 and the V-shaped member 7 are in a predetermined braking standby state (before the lever operation). Return to position.
The slide member 81 from which the pressure from the distal end portion 7a of the V-shaped member 7 is released is lifted by the elastic biasing force of the return spring 83 and the friction member 82, and is in a predetermined braking standby state (before the lever operation). Return to position.

2 and 4, the rear wheel 8, the axle 85, the wheel support member 86, the turning bearing member 87, the base member 88, the turning reference shaft 89, and the sliding member. A rear wheel unit Yb having 81, a friction member 82, and a return spring 83 is detachably attached to the cargo bed member 1. The rear wheel unit Yb is configured such that the wheel support member 86 and the wheel 8 can turn around the turning axis L8 (360 degrees) with respect to the base member 88.
The load carrier member 1 and the base member 88 of the rear wheel unit Yb are screwed (detached) from the screw holes provided in the load carrier member 1 so that the load carrier member 1 and the rear wheel unit are removed. Yb can be separated.

In addition, as shown in FIG. 2, the front wheel 8 and the wheel support member 86 that supports the front wheel 8 are turnable about the turning axis L8 (360 degrees) with respect to the base member 88. A configured front wheel unit Ya is provided.
Similar to the rear wheel unit Yb, the front wheel unit Ya includes wheels 8, an axle 85, a wheel support member 86, a turning bearing member 87, a base member 88, and a turning reference shaft 89. . Further, unlike the rear wheel unit Yb, the front wheel unit Ya is not provided with the slide member 81 and the friction member 82 (omitted).

  The front wheel unit Ya is detachably attached to the loading platform member 1, and the screw member attaching the loading platform member 1 and the base member 88 is screwed (removed) from the screw hole provided in the loading platform member 1. Thus, the cargo bed member 1 and the front wheel unit Ya can be separated.

And the loading platform member 1 has the base attachment part in which the some screw hole was formed in each of right and left of the bottom face 1b by the side of the front-and-rear end edge 1c. The front wheel unit Ya and the rear wheel unit Yb are configured to be selectively attachable to one of the front and rear base mounting portions.
Moreover, the loading platform member 1 has a base mounting portion in which a plurality of screw holes are formed on the left and right sides of the bottom surface 1b on the front and rear other end edge 1d side. The front wheel unit Ya and the rear wheel unit Yb are configured to be selectively attachable to the other front and rear base mounting portions.
That is, the arrangement (pitch) of the plurality of screw holes provided in one of the front and rear base attachment portions and the other front and rear base attachment portion is the same as the arrangement of the screw insertion holes of the base member 88 of the front wheel unit Ya and the base of the rear wheel unit Yb. This corresponds to both the arrangement of the screw insertion holes of the member 88.

  Here, as shown in FIG. 5 (a), the pair of front and rear support members 2, 2 and the handle member 3 erected on the loading platform member 1 include the left-right direction center line S of the loading platform member 1, It arrange | positions between the left-right one side edge 1e of the loading platform member 1. FIG. In other words, the support members 2 and 2 and the handle member 3 are arranged close to the left and right side edge 1e side from the center line S in the left and right direction.

FIG. 5A illustrates a right-hand operation configuration in which the handle member 3 is used by approaching the user's right hand side.
That is, it is the structure which uses the front-and-rear one end edge 1c of the loading platform member 1 as the front (traveling direction N) and the front-and-rear other end edge 1d as the rear.
As shown in FIGS. 1, 2 and 5 (a), this right-handed operation configuration is such that the front wheel units Ya and Ya are attached to the front and rear end edges 1c of the loading platform member 1, and the front and rear other end edges 1d are attached. The rear wheel units Yb and Yb are attached.
Further, the V-shaped member 7 is attached (suspended and supported) to the carrier member 1 such that the front end portions 7a and 7a are disposed on the front and rear other end edge 1d side.
The handle member 3 is connected to the pair of front and rear support members 2 and 2 so that the front end of the brake lever 31 is on the front and rear other end edge 1d side of the loading platform member 1 (corresponding to the support member 2 on the rear side). Are attached. The flexible wire 4 is inserted through the inside of the column member 2 on the rear side.
The link mechanism 5 is provided so as to correspond to the shaft member 53 suspended from the pair of left and right shaft support portions 13D, 13D near the front and rear other end edge 1d and the cross-shaped base end portion 7b of the V-shaped member 7. Yes.
The return bullet urging member 59 has one end attached to the swing member 51 and the other end attached to the front and rear end edges 1 c of the loading platform member 1.

FIG. 5B illustrates a left-hand operation configuration in which the handle member 3 is used by approaching the user's left-hand side.
That is, the front and rear other end edge 1d of the loading platform member 1 is the front (traveling direction N) and the front and rear one end edge 1c is used as the rear.
In this left-hand operation configuration, front wheel units Ya and Ya are attached to the front and rear other end edge 1d side, and rear wheel units Yb and Yb are attached to the front and rear one end edge 1c side.
Further, the V-shaped member 7 is attached (suspended and supported) to the carrier member 1 such that the front end portions 7a and 7a are disposed on the front and rear end edges 1c side.
The handle member 3 is attached to the pair of front and rear support members 2 and 2 so that the front end of the brake lever 31 is on the front and rear end edge 1c side of the loading platform member 1 (corresponding to the support member 2 on the rear side). I wear it. The flexible wire 4 is inserted through the inside of the column member 2 on the rear side.
The link mechanism 5 corresponds to a shaft member 53 suspended on a pair of left and right shaft support portions 13C, 13C (see FIG. 2) near the front and rear end edges 1c, and a cross-shaped base end portion 7b of the V-shaped member 7. It is provided as follows.
The return bullet urging member 59 has one end attached to the swing member 51 and the other end attached to the front and rear other end edge 1 d side of the loading platform member 1.

  In this way, while placing the support members 2 and 2 and the handle member 3 close to the left and right side edge 1e from the lateral center line S of the loading platform member 1, the user's dominant hand and weight can be reduced. The specifications can be easily changed with common parts for the right-handed operation configuration and the left-handed operation configuration according to the dominant leg to be supported (leg portion to be protected), the preferred standing position, and the like.

  Furthermore, the handle member 3 is disposed close to the user side (left and right side edge 1e side) from the lateral center line S, and the rear wheel 8 is braked, so that it can be safely stopped.

  Here, if only the front wheel 8 is braked, there is a risk that the vehicle will fall forward. Further, even if all four wheels 8 are braked, the front wheels 8 are braked, so that there is a possibility that the wheels 8 may fall over in the same manner. Therefore, in the present invention, since the front wheels 8 are not braked and only the rear wheels 8 are braked, even if sudden braking is performed, it is possible to prevent the vehicle from falling forward. In addition, compared with the case where only the front and rear wheels 8 and 8 on the left and right side edge 1e side are braked and the case where only the front and rear wheels 8 and 8 on the left and right other side edge 1f side are braked, the entire handcart does not turn. The vehicle can be braked in a straight running posture. Further, since the rotation of the wheel 8 is braked without locking the turning of the wheel 8, the wheel support member 86 (the wheel 8) is not locked in a lateral posture during the turning, and an accident such as a fall due to a brake can be prevented.

  Further, the loading platform member 1 is a flat box having a lower opening shape having an upper wall portion having a load receiving surface 1a as an upper surface and a bottom surface 1b as a lower surface, and an enclosing wall portion provided in a suspended manner along the outer edge of the upper wall portion. (Shallow plate) type. The shape of the carrier member 1 in a plan view is free, such as a rectangular shape, an X shape in which each side is curved inwardly from the rectangular shape, and an elliptical shape. Also, a bottom cover that protects parts such as the link mechanism 5, the V-shaped member 7, the flexible wire 4, and the shaft support portion 13 disposed in the storage space surrounded by the bottom surface 1 b and the surrounding wall portion. A member may be provided.

Further, the carrier member 1 is used for the front wheel unit Ya, the rear wheel unit Yb, the link mechanism 5 (shaft member 53), the V-shaped member 7, the return bullet urging member 59, the flexible wire 4, the guide tube 40, and the like. The component mounting portion and the component positioning portion, the flexible wire 4 and the guide portion of the guide tube 40 are arranged in line symmetry with respect to the center line in the front-rear direction of the loading platform member 1.
In addition, on the bottom surface 1b of the loading platform member 1, a V-shaped housing portion on the other side of the front and rear sides where the V-shaped member 7 is disposed in the right-hand use configuration and a V-shaped member 7 in the left-hand use configuration An X-shaped accommodating portion 10 (see FIG. 2) is provided in which the front and rear one side V-shaped accommodating portions provided are connected in the central region of the bottom surface 1b of the loading platform member 1.
The X-shaped accommodating part 10 is comprised by the wall part for accommodation provided in the hanging form from the bottom face 1b, and the bottom face 1b. With the X-shaped housing portion 10, the arrangement position of the V-shaped member 7 can be intuitively understood, and the specifications of the right-hand use configuration and the left-hand use configuration can be changed easily and quickly.
Further, since the accommodating portion 10 is provided in an X shape and the member for transmitting the operating force to the slide member 81 is the V-shaped member 7, the load carrier member 1 can be used in either the right hand use configuration or the left hand use configuration. If the front-rear direction is changed and the tip portions 7a, 7a of the V-shaped member 7 are arranged on the rear side, the V-shaped member 7 will not be braked on the rear side (without braking the front wheels 8, 8). It can be set to brake only the wheels 8,8.

The strut member 2 has an expandable double-cylinder structure having an inner pipe member that is slidably inserted in an up and down direction into an outer pipe member erected on the cargo bed member 1.
The vertical inner pipe member slides up and down in the vertical outer pipe member, from the extended state (the highest position of the handle member 3) to the shortened state (the lowest position of the handle member 3), The height of the handle member 3 can be adjusted so as to be extendable.

The handle member 3 has a base end portion of a rod-shaped brake lever 31 pivotally attached to the front and rear intermediate portion of a portal handle casing 30, and a distal end portion of the brake lever 31 is arranged around a horizontal pivot shaft. It can swing freely.
Further, a swing lock member 39 that is swingable about a horizontal horizontal axis is pivotally attached to the casing 30 in the vicinity of the tip of the brake lever 31. As shown in FIGS. 1 and 2, when the rocking lock member 39 is changed from a suspended posture in which the rocking tip portion is directed downward to an upright posture in which the rocking tip portion is rocked upward, The vicinity of the front end is abutted and supported from below, and is configured to be supported (locked) in the posture when the brake lever 31 is braked. In other words, the swing lock member 39 is set in an upright posture so that the brake (brake) state is maintained even when the operation (gripping) of the brake lever 31 is released.
As described above, the handle member 3 is provided with the swing lock member 39 that can lock and unlock the brake, so that the user can easily and quickly hold the brake locked state (side brake state) while standing. Or on the contrary, it can be switched to the release state. In particular, it is possible to prevent the handcart from running quickly and safely while standing on a bus or train.

  When the support member 2 is shortened, the flexible wire 4 and the guide tube 40 have a U-turn portion along the bottom surface 1b of the loading platform member 1 (in the storage space) as shown by a two-dot chain line in FIG. It is guided by a guide portion such as a guide wall or a guide hole provided on the bottom surface 1b of the loading platform member 1 so as to expand.

  The link mechanism 5 receives the operation force transmitted from the flexible wire rod 4, so that the cross base end portion 7 b of the V-shaped member 7 rises and the distal end portions 7 a and 7 a descend. The other end portion 4b of 4 and the cross-shaped base end portion 7b of the V-shaped member 7 may be configured to be interlocked. For example, although not shown in the drawings, the vertically moving member 52 may be omitted, and the other end 51b of the swing member 51 may be pivotally (directly) attached to the cross-shaped base end 7b.

In the present invention, the design can be changed, and the front wheel unit Ya and the rear wheel unit Yb can rotate around the turning axis L8 with respect to the base member 88 if the wheel support member 86 and the wheel 8 can turn around the turning axis L8. The structure of the turning mechanism such as the turning reference shaft 89 and the bearing member 87 is free.
In addition, in this invention, the front means the advancing direction N when a user goes straight ahead (toward a user's front).

  As described above, the handcart of the present invention includes the load carrier member 1 on which the wheel 8 that can turn freely around the vertical turning axis L8 is attached to the front, rear, left, and right, along the bottom surface 1b of the load carrier member 1. A V-shaped member 7 is provided, and the V-shaped member 7 has a cross-shaped base end portion 7b disposed in a central region of the bottom surface 1b, and each distal end portion 7a, 7a has a rear side portion. The V-shaped member 7 receives the operating force transmitted from the operating force transmitting flexible wire 4 which is disposed above the wheels 8 and 8 and has one end 4a attached to the brake lever 31. The other end 4b of the flexible wire 4 and the crossed base end 7b of the V-shaped member 7 are interlocked so that the cross base end 7b rises and each tip 7a, 7a descends. And a link mechanism 5 that is pressed downward by the lowering of the tip 7a of the V-shaped member 7. Since the id member 81 and the friction member 82 pressed against the outer peripheral surface of the wheel 8 on the rear side by the lowering of the slide member 81 are provided, all four wheels 8 and 8 are turnable (casters). However, it can be braked reliably and safely. In addition, direction change (change of course) and small turn can be performed easily and smoothly. The rear wheels 8, 8 that can turn freely can be braked reliably and safely. The rear wheel unit Yb having the rear wheel 8 to be braked can be configured to be detachable from the bed member 1.

  Further, since the slide member 81 is arranged coaxially with the turning axis L8, the friction member 82 can be reliably brought into pressure contact with the wheel 8 even when the wheel 8 is turning, Safe and stable braking force can be exhibited.

DESCRIPTION OF SYMBOLS 1 Loading platform member 1b Bottom surface 4 Flexible wire 4a One end part 4b Other end part 5 Link mechanism 7 V-shaped member 7a Tip part 7b Cross base end part 8 Wheel
31 Brake lever
81 Slide member
82 Friction member L8 Rotation axis

Claims (2)

A load carrier member (1) to which a wheel (8) capable of turning around a vertical turning axis (L8) is attached to the front, rear, left and right is provided.
A V-shaped member (7) is provided along the bottom surface (1b) of the loading platform member (1), and the V-shaped member (7) has a cross-shaped base end (7b) that has the bottom surface (1b). ) And the tip portions (7a) and (7a) are arranged above the wheels (8) and (8) on the rear side,
The cross base end portion of the V-shaped member (7) in response to the operating force transmitted from the operating force transmitting flexible wire (4) having one end portion (4a) attached to the brake lever (31) (7b) crosses the base of the other end (4b) of the flexible wire (4) and the V-shaped member (7) so that each tip (7a) (7a) descends as the ascent (7b) rises. A link mechanism (5) for interlockingly connecting the end portions (7b);
Further, the slide member (81) pressed downward by the lowering of the tip end portion (7a) of the V-shaped member (7), and the rear wheel (8) of the rear side by the lowering of the slide member (81). And a friction member (82) pressed against the outer peripheral surface.   The handcart according to claim 1, wherein the slide member (81) is disposed coaxially with the pivot axis (L8).

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