JP3535065B2 - Hand truck with brake mechanism - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand truck for placing and carrying luggage or the like, and more particularly to a hand truck having a brake mechanism.

[0002]

2. Description of the Related Art Conventionally, hand carts have been used for carrying luggage and the like. This cart is equipped with casters on the back surface of a rectangular loading platform on which luggage and the like can be mounted so that it can travel, and a handle having, for example, a downward U-shape is provided on the front surface side of the loading platform. Then, by pushing or pulling the hand truck, the luggage placed on the bed is carried.

In such a hand truck, for example, when traveling on a slope, a slope or the like, there is a danger that the hand truck will suddenly accelerate and the human hand may be released and runaway.
Some such hand trucks have a brake mechanism.

As an example of such a brake mechanism, a structure in which a hand cart is always free to run and the hand cart can be braked if necessary (hereinafter referred to as "constant running type") ) As the actual Kaisho 51-935
No. 57 and Japanese Utility Model Laid-Open No. 52-86161 (FIG. 13), and also provided with a brake mechanism that allows the caster to be rotated at all times to release the brake during traveling. There are hand trucks (Fig. 14) disclosed in Japanese Utility Model Laid-Open No. 7-31560 (Fig. 14) and hand trucks (Fig. 15) disclosed in JP-A-10-181610 as (hereinafter, referred to as "always non-traveling type").

[0005]

Among the conventional hand trucks described above, the hand trucks disclosed in Japanese Utility Model Publication No. 51-93557 and Japanese Utility Model Publication No. 52-86161 are shown in FIG.
As shown in FIG. 5, the brake shoe 92 is pressed against the outer circumference of the wheel by gripping the brake lever 7 together with the grip portion 63 of the handlebar 6 so that the brake of the manual cart 1 is performed. 1, which is disclosed in Japanese Utility Model Laid-Open No. 31560/1995 and Japanese Patent Application Laid-Open No. 10-181610.
14B and 15B is configured such that the brake is activated by the urging force of the return spring 94 shown in FIGS. 14B and 15B when the brake lever 7 is released. The hand-held cart 1 is a non-traveling type hand-carrying vehicle 1 that grips 7 together with the grip portion 63 of the handle to release the brake.

[0006] These two types of hand trucks 1 are the constant travel type hand trucks 1. For example, during sudden braking, if the handle 6 and the brake lever 7 are firmly gripped, the truck 1 can be stopped. However, there is a drawback that the braking operation during running is easy to perform, but the brakes are not activated when loading and unloading luggage, so that the transport vehicle moves and it is difficult to work.

On the other hand, in the case of the non-traveling type hand cart 1 on the contrary, it is easy to perform work while keeping the cart 1 stopped during loading and unloading of luggage, but while the cart 1 is traveling, When the carrier 1 is braked, a delicate operation such as releasing only the brake lever 7 from the state where both the grip portion 63 of the handle 6 and the brake lever 7 are gripped or weakening the gripping force of only the brake lever is performed. It is necessary to perform it, and it is extremely difficult to gradually apply a brake to the cart. As described above, each type of the cart 1 has advantages and disadvantages as described above as an example.

The type of such a hand-carrying vehicle 1 is determined according to the working environment in which the hand-carrying vehicle 1 is used, the working conditions, the preference of the user, and the like. In the vehicle 1, because of its structure, only one of the models is specified, and it is not possible to select one of the models depending on the working environment, the working conditions, and the preference of the user. Therefore, it is necessary to prepare each type of hand truck 1 according to the working environment, the use conditions, and the preference of the user.

Further, Japanese Utility Model Publication No. 51-93557, Japanese Utility Model Publication No. 52-86161, and Japanese Utility Model Publication No. 7-3156.
In the hand truck shown in Japanese Patent No. 0, since a wire is used as the connecting means 8 for operating the brake shoe 92 in conjunction with the brake lever 7 (FIGS. 13 and 1).
4B), if the wire is stretched, the braking condition changes and adjustment is required. Further, the wire is more likely to be damaged such as cut as compared with the connecting means made of a metal rod or the like.

On the other hand, when the connecting means 8 is formed of a metal rod or the like as in the hand truck 1 (see FIGS. 15A and 15B) of Japanese Patent Laid-Open No. 10-181610, the handle 6 cannot be folded. It has drawbacks and is inconvenient for storage.

Further, a brake of the type in which the brake shoes 92 are directly pressed against the outer periphery of the wheel 42 (see FIGS. 13 and 14).
In the case of (B), the outer circumference of the wheel 42 wears as it is used, and good running performance cannot be obtained.

Further, with respect to the mounting position of the brake lever 7, each of the above-mentioned hand carts 1 has the following problems.

In the hand truck (see FIG. 13) disclosed in Japanese Utility Model Publication No. 51-93557 and Japanese Utility Model Publication No. 52-86161, the brake lever 7 is provided below the grip portion 63 of the handle 6. Therefore, it is difficult to apply a force to push or pull the handle 6 to drive the carrier 1 and adjust the amount of pulling up the brake lever 7 to adjust the braking of the hand carrier 1. It is difficult to handle. In addition, since it is necessary to perform work in a posture in which the wrist is forcibly bent, it causes excessive fatigue to a person who uses this type of hand truck.

Further, in the hand truck 1 shown in JP-A-10-181610 (see FIG. 15A), the brake lever 7 provided on the grip 63 of the handle 6 is gripped together with the grip 63 of the handle 6. Since the brake is released by doing so, it is difficult to perform a delicate operation such as gradually weakening the force of gripping the brake lever to apply the brake. Further, when such a delicate operation is performed, the force of gripping the handle 6 is weakened, so that the cart 1
It becomes difficult to change the direction of.

Further, in the hand truck 1 (see FIG. 14A) disclosed in Japanese Utility Model Laid-Open No. 7-31560, when the grip portion 63 is gripped by facing the handle 6, the brake lever 7 moves to the grip portion 63. Since the brake lever 7 is located at the rear, it is necessary to operate the brake lever 7 with one thumb, and it is difficult to operate and the burden on the fingers and the fatigue are large. Further, when the handle 6 is folded and stored, the brake lever 7 is in a state of protruding above the luggage carrier 2. Therefore, for example, in the case where a plurality of hand trucks 1 are stacked and stored, the weight of the stacked transport cars is used. As a result, the brake lever 7 is operated, and a malfunction is likely to occur.

In the hand truck 1 having such a brake mechanism, the structure of the hand truck to which the brake mechanism is attached is made common to that of the existing hand truck having no brake mechanism, and its manufacturing process is performed. If parts and the like can be shared, it is convenient because it is possible to reduce the manufacturing cost and to provide a hand truck with a brake mechanism relatively easily and inexpensively.

Therefore, the hand truck of the present invention is made to solve the above-mentioned drawbacks of the prior art. One hand truck is used in accordance with the use environment, working conditions, preference of the user, and the like. It is an object of the present invention to provide a handcart with a brake mechanism, which can be appropriately changed to a type of always running or not always running.

Another object of the present invention is that, while the handle is foldable, there is a problem that the brake mechanism is misaligned or broken like the conventional brake mechanism using connecting means such as wires. An object of the present invention is to provide a hand cart with a brake mechanism, which is provided with a difficult connecting means.

Further, another object of the present invention is to make the operation easier by devising the arrangement position of the brake lever.
Another object of the present invention is to provide a hand cart with a brake mechanism that is less likely to malfunction.

In addition, by using a brake mechanism that can be easily attached to an existing hand truck that does not have a brake mechanism, the manufacturing process, parts, etc. can be shared.
An object of the present invention is to provide a hand cart with a brake mechanism relatively easily and inexpensively.

[0021]

In order to achieve the above object, a hand truck 1 with a brake mechanism according to the present invention has casters 3 attached to the back surface of a bed 2 having a substantially rectangular plane shape.
a, 3b; 4a, 4b, and the cargo bed 2 at one edge of the cargo bed 2
A brake 9 that includes a handle 6 that is provided upright on the surface and that restricts rotation of wheels 42 and 42 provided on the casters 4a and 4b, a brake lever 7 attached to the handle 6, and the brake lever. 7, a brake mechanism comprising a connecting means 8 for operating the brake 9 is provided, and the brake 9 is provided with a cam 96 for operating the brake 9.
2, the brake shoes 92, 92 arranged in the brake drum 91 are pressed against the inner wall of the drum 91 to separate the brake shoes 92, 92 from the inner wall 91 of the drum. Also, the cam 96 can be rotated by the sliding movement of the brake lever 7 via the operating lever 97 that is interlocked with the connecting means 8, and the position at which the brake lever 7 is not operated, that is, the original position of the brake lever 7 is set. The initial position of the actuating lever 97 at the position where the cam 96 is the wheel
42, a position for restricting the rotation of 42, or the wheel 4
Arbitrarily select one of the positions that freely rotate 2, 42
It is characterized in that the rotation start position of the cam 96, that is, the initial position of the cam 96 is adjustable.

The base end portion of the brake lever 7 is attached via the brake lever post 72 or the like provided at an appropriate position such as the outside (right side in FIG. 1) of the loading platform 2 of the handle 6, and the operation of the brake lever 7 is performed. Therefore, the operating portion 71 of the brake lever 7 coated with a resin such as PP is attached to the cargo bed 2 side (the left side of the holding portion 63 in FIG. 1) and is substantially the same as the holding portion 63 of the handle 6 for easy handling. It is characterized by being placed at a height.

Further, the base end portion of the handle 6 is slidably supported so that it can be folded toward the surface of the loading platform 2 (see the chain double-dashed line in FIG. 1), and at least the shaft support of the handle 6 is supported. The connecting means 8 at a position corresponding to the position may be constituted by a chain 83 (see FIG. 11).

Further, the handle 6 is positioned in a direction substantially perpendicular to the loading platform 2 and is relatively opposed in the width direction of the handle.
And two rods 61, 62 for
2 is a vertical portion 61 that is perpendicular to the platform 2.
b, 62b and the bent portions 61a, 6 bent at the upper ends of the vertical portions 61b, 62b toward the outside of the luggage carrier 2.
2a, and the operation portion 71 of the brake lever 7
Is a space defined by the extension of the vertical portions 61b and 62b and the bent portions 61a and 62a (θ in FIG. 1).
It can also be located inside.

Further, the brake 9 is connected to the caster 4a.
It is preferable that the caster 4a (4b) is formed integrally with the inside of (4b) .

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described below with reference to the accompanying drawings.

[Overall Configuration of Hand Cart] In FIG. 1, 1
Is a hand truck of the present invention, and this hand truck 1
Is a substantially flat rectangular loading platform 2 on which luggage and the like are placed, and casters (3a, 3a,
3b; 4a, 4b), a handle 6 provided upright on the front surface side of the loading platform 2, and a brake mechanism for braking the hand cart 1.

The casters (3a, 3b; 4a, 4b)
Are provided on the back surface of the loading platform 2 at substantially symmetrical positions near both ends in the longitudinal direction of the loading platform 2. In the present embodiment, the casters 3a, 3b attached to one end side are rotatable yokes. The casters 3a and 3b each having a steering angle can be changed appropriately, and the casters 4a and 4b arranged on the other end side are fixed casters with a fixed steering angle. Both may use fixed casters, and the combination thereof is not limited to the above example.

The handle 6 is not limited to this embodiment, and various shapes can be used. As an example, in this embodiment, as shown in FIG. 2, the handle 6 is substantially perpendicular to the surface of the cargo bed 2. Direction two rods 61, 62 and the rod 6
It is formed in a substantially downward U-shape that is composed of a horizontal rod that connects the upper ends of the first and the second rods 62. The horizontal rod serves as a grip portion 63 that is gripped when the hand cart 1 is operated. Then, by gripping the handle 6, the hand cart 1
It is configured so that the vehicle can be run by pushing or pulling, and can change the direction as appropriate.

In this embodiment, as shown in FIG. 1, the handle 6 is mounted closer to the end edge of the loading platform 2 than the mounting positions of the fixed casters 4a and 4b, and is erected substantially vertically on the loading platform 2. The rods 61, 62 have vertical upper portions approximately 1/3 bent toward the outside (right side in FIG. 1) of the loading platform 2 to form vertical portions 61b, 62 perpendicular to the loading platform 2.
b and the bent portions 61a and 62a formed by being bent are formed.

The handle 6 has vertical portions 61b and 6b.
At the lower end of 2b, that is, at the base end of the handle 6, it is pivotally supported by the fixing metal fitting 64, and is pivoted about this pivotal support position as shown by the chain double-dashed line in FIG. It is configured to be foldable.

The two vertical portions 61b, 62 of the handle 6
b The two fixing fittings 64, 64 that pivotally support the lower end are provided with elongated openings 6 formed in the two fixing tools 64, 64.
A locking rod 66 is provided which penetrates between the fixing metal members 64, 64 and penetrates between the fixing members 65, 65, and is guided by the shape of the openings 65, 65 so that the locking rod 66 can be opened. It is configured to be movable inside. And, this locking rod 66,
For example, the handle 6 is urged by urging means such as a spring to be positioned in the upper end direction of the openings 65, 65, and at this position, the lower ends of the vertical portions 61b, 62b of the handle 6 are locked so that the handle 6 can move. It keeps standing upright. Therefore, by pushing down the locking rod 66 against the biasing force of the spring and locating the locking rod 66 below the openings 65, 65, the handle vertical portion 61b by the locking rod 66,
The lower end of the 62b is unlocked, and the handle 6 can be slid toward the surface of the loading platform 2 to be folded.

[Brake mechanism] Fixed casters 4a, 4b
The brake mechanism that restricts the rotation of the wheels 42, 42 is a brake lever 7 provided on the handle 6, a brake 9 that is operated by operating the brake lever 7, and the brake 9 that is linked to the operation of the brake lever 7. It comprises a connecting means 8 for operating.

In the present embodiment, the brake 9 is provided in the fixed casters 4a, 4b.
Although it is formed integrally with b, the brake 9 may be formed separately from the fixed casters 4a and 4b, and the structure is not limited to the following structure.

Further, in this embodiment, the brake 9
A description will be made of an example in which the fixed casters 4a and 4b on the handle 6 side are provided with the brake 9.
It may be provided in a and 3b, may be provided in all casters, and may be provided in any of the casters or in any combination, and is not limited to the present embodiment.

[Fixed Casters] FIG. 4, FIG. 5 and FIG. 6 show structural examples of the fixed casters 4a and 4b provided with the brake 9 described above.

The fixed casters shown in FIGS. 4, 5 and 6 are fixed casters 4b mounted on the right side in FIG. 2, and the fixed casters 4a mounted on the left side in FIG. 2 are shown in FIGS. It has a symmetrical shape with the fixed caster 4b shown in FIG.

In FIGS. 4, 5 and 6, the fixed caster 4b is attached to the side wall of the yoke 41 having an inverted L-shaped cross section which also acts as a fixing metal fitting when the fixed caster 4b is attached to the back surface of the luggage carrier 2. The wheel 42 and the above-described brake 9 for restricting the rotation of the wheel 42 are attached and integrally formed (see FIG. 5), and the upper surface 41 b of the yoke 41 that abuts on the back surface of the luggage carrier 2 includes: Fixed casters 4
For example, a bolt hole 43 for fixing b to the back surface of the loading platform 2.
Are provided (see FIG. 6). Preferably, the bolt hole 43 is formed at the same position as that of a fixed caster used for an existing hand truck without a brake mechanism, so that the brake mechanism can be easily installed on the existing hand truck. It can also be attachable.

A shaft 44 protruding in a direction orthogonal to the side wall 41a of the yoke 41 is provided with a brake 9 which will be described later.
And the wheel 4 through the bearing 45 through the center of the wheel 42.
A fixed caster 4b is formed so as to rotatably support the two.

Reference numeral 46 in FIG. 5 is a cover, which prevents dust, such as sand and dust, and water from entering the bearing 45 of the wheel 42.

The structure of the brake 9 described above is shown in FIG. 7 as an example. The brake 9 shown in FIG. 7 is a so-called internal expansion type mechanical brake, and is a brake drum 91.
Disposed within, brake lining 9 on the curved surface of the outer peripheral side
3 second half-moon shaped brake shoes 9 attached
2, 92 are attached to the side wall 41a of the yoke 41 and arranged so as to face each other, and return springs 94, which urge the brake shoes 92, 92 in directions toward each other,
94 is provided.

Further, the second brake shoes 92, 92
An anchor pin 95 is positioned between the one ends of the brake shoes 92, 92 so that the brake shoes 92, 92 can be swung about the anchor pin 95, and a cam is provided between the other ends of the brake shoes 92, 92. 96 is provided, and the operating lever 97 is connected to the cam 96.

The operating lever 97 is connected to the cam 96, and the operating lever 97 is centered on the connecting position with the cam 96.
The cam 96 is rotated by rotating the brake shoe 92, 9 by rotating the cam 96.
The gap between the two is expanded and the brake lining 93 is the drum 9
Wheel 4 pressed against the inner wall of No. 1 and connected to drum 91
2 rotation is restricted.

In the state shown in FIG. 7, the brake linings 93, 93 are not in contact with the inner wall of the drum 91, and thus the brake is not applied, that is, the hand cart 1 is in a travelable state. .

[0045] Then, when擺動the actuating lever 97 in the clockwise direction or counterclockwise direction in FIG. 7 from this state, between one end of the brake shoes 92 and 92 to rotate the cam 96 in conjunction with the actuating lever 97 And the brake linings 93, 93 provided on the outer peripheral side of the brake shoes 92, 92 having an expanded space are pressed against the inner wall of the drum 91. Therefore, the rotation of the wheels 42 connected to the drum 91 is restricted, and the hand cart 1 is in a braked state.

In the fixed caster 4b provided with the brake 9 as described above, as shown in FIG. 1 for example, the operating lever 97 is substantially parallel to the back surface of the luggage carrier 2 and protrudes rearward of the luggage carrier 2. By attaching the operating lever 97 and connecting the operating lever 97 to the brake lever 7 via a connecting means 8 to be described later, the operating lever 97 is slid by the operation of the brake lever 7 so that the brake 9 can be operated.

Although the brake 9 has been described as having the structure shown in FIG. 7 in the present embodiment, the structure of the brake 9 is not limited to that described above.

[Brake Lever] In the present embodiment, the brake lever 7 for operating the above-described brake 9 has a downward U-shape as shown in FIG. 8, and the base end portion of the brake lever 7 is shown in FIG. As shown in FIG. 1 , the handle 6 is slidably attached to the attached brake lever post 72 located outside (right side in FIG. 1) of the loading platform 2 .

As described above, the brake lever 7 formed in the downward U-shape is used as an operating portion 71 for applying a finger to the horizontal portion of the brake lever 7, and the operating portion 71 is gripped together with the grip portion 63 of the handle 6. Or by releasing the brake 9
In consideration of the easiness of handling and the operability when operating while gripping the handle 6, the hand cart 1 of the present invention holds the handle 6 when facing the handle 6. The operation portion 71 of the brake lever 7 is arranged at a position in front of the portion 63.

In addition, in the hand cart 1 of the present invention, the operation portion 71 is connected to the vertical portion 61 of the handle 6.
The handle 6 is slid toward the surface of the loading platform 2 because it is positioned in the space (θ in FIG. 1) defined by the extension lines of b and 62b and the bent portions 61a and 62a. When folded, the brake lever 7 does not hit the surface of the luggage carrier 2 and the brake 9 is not operated,
Further, when the handlebar 6 is folded in this way, the brake lever 7 moves the bent portions 61a, 62a of the handlebar 6a.
And the grip portion 63 is configured to be guarded. For example, even when another hand truck or the like is stacked and stored on the hand truck 1 in which the handle 6 is folded, it is possible to separate the stacked carts. The brake lever 7 is prevented from swinging due to the weight of the hand truck.

As shown in FIG. 9, the brake lever 7 is formed with a swinging portion 74 which projects around the support shaft of the brake lever post 72 inserted into the bearing hole 73. When it swings, the swinging portion 74 swings in the same direction as the brake lever 7.

In the direction of arrow A in FIG. 9, a connecting hole 75 is formed as shown in FIG. 10, and one end of a connecting means 8 to be described later is inserted into the connecting hole 75 for connection and the connection is made. The other end of the means 8 is connected to the operating lever 97 through a connecting hole 98 formed in the operating lever 97 of the brake 9 described above,
The operation lever 97 is driven by the movement of the brake lever 7.
And the fixed casters 4a, 4b by the brake 9
The rotation of the wheels 42 is restricted, or the restriction is released.

In the present embodiment, the brake lever 7 has been described as having a substantially downward U-shape as described above, but the structure of the brake lever 7 is not limited to that described above. , Various configurations can be used.

[Connecting Means] FIG. 11 shows a structural example of the connecting means 8 for connecting the swinging portion 74 provided on the brake lever 7 and the operating lever 97 provided on the brake 9 to each other.

[0055] connecting means 8 shown in FIG. 11, the swing part 7
4 , a metal rod-shaped connecting rod 81 and a metal rod-shaped connecting rod 82 connected to the actuating lever 97 are provided. The connecting rod 81 is connected to both connecting rods 81 and 82 by a chain 83 welded or the like. , 82 are connected. Therefore, at the portion connected by the chain 83, the connecting means 8
Is foldable.

Each of the connecting rods 81 and 82 is threaded from its end portion to its outer periphery by a predetermined length, and the connecting rod 81 forming one end portion of the connecting means 8 has the swinging portion 74.
Is inserted into the connecting hole 75 formed in the connecting hole 75, and a nut is screwed onto the outer periphery of the connecting rod 81 at the portion of the swinging portion 74 that protrudes through the connecting hole 75 and is inserted into the connecting hole 75. The connecting rod 81 is prevented from falling out of the connecting hole 75.

On the other hand, the connecting rod 82 forming the other end of the connecting means 8 is projected to the back surface side of the luggage carrier 2 through the through hole 22 formed in the luggage carrier 2, and is projected to the back surface of the luggage carrier 2. The tip of the connecting rod 82 is inserted into the connecting hole 98 of the operating lever 97, the operating lever 97 is sandwiched between the nuts 86, 86 screwed to the connecting rod 82, and the connecting rod 82 slips off and the operating lever The mounting position of 97 can be adjusted.

In the present embodiment, the outer circumference of the connecting rod 82 protruding from the back surface of the luggage carrier 2 is surrounded by the spring 85, and the spring 85 urges the operating lever 97 downward. (See a partially enlarged view in FIG. 1).

Further, the connecting means 8 has the swinging portion 74.
And the operating lever 97 are formed to be slightly longer than the length required for connecting the connecting rods 81, 82 inserted into the connecting hole 75 of the rocking portion 74 or the connecting hole 98 of the operating lever 97.
Has a play in a length protruding through the opening, and the play is adjusted by tightening the nut to adjust the tension of the connecting member 8 provided between the rocking portion 74 and the operating lever 97 ( The urging force or rigidity corresponding to the play can be adjusted.

Further, in the connecting rod 82 connected to the operating lever 97 of the brake 9, at which position of the connecting rod 82 the operating lever 97 pushed down by the spring 85 is fixed, for example, the connecting rod 82 is connected. It is configured to be adjustable by the screwing positions of the nuts 86, 86 attached to the rod 82, and by this adjustment, it is possible to arbitrarily select whether the hand cart 1 is of a constant traveling type or a constant non-traveling type. can do.

The chain 83 and the connecting rods 81 and 82 connected by the chain 83 are surrounded by rubber, plastic, or any other flexible material, for example, by winding a resin material formed in a spiral shape. do it,
It is also possible to secure the bendability of this portion while protecting it.

The connecting means 8 configured as described above can be arranged so as to fit within the width of the vertical portions 61b and 62b of the handle 6 in the front view, as shown in FIG. By doing so, the luggage or the like placed on the luggage carrier 2 is protected by the vertical portions 61b and 62b of the handle 6 and the back plate that bridges between the vertical portions 61b and 62b, so that it is difficult to contact the connecting means 8. Therefore, the malfunction of the brake 9 due to the contact with the luggage or the like is prevented. When a hollow iron pipe is used as the handle 6, the connecting means 8 may be arranged in the handle 6 so as to be completely protected from contact with luggage or the like on the bed 2.

The configuration of the connecting means 8, the interlocking between the brake lever 7 and the brake 9 by the connecting means 8, and other configurations are not limited to the configurations described in the above embodiments, and do not depart from the scope of the present invention. Various changes can be made within the range. The material and shape of the handle 6 are not limited to the above-mentioned carrying type, and may be a round pipe, a square pipe, or the like.

[Operation of the hand truck] The operation of the hand truck 1 with a brake mechanism of the present invention configured as described above will be described. The screwing positions of the nuts 86, 86 attached to the outer periphery of the connecting rod 82 will be described. Is adjusted and / or the length of the spring 85 is changed, and the operation portion 71 of the brake lever 7 is separated from the grip portion 63 of the handle 6, that is, the brake lever 7 is not operated. Actuating lever 97 in position 7
Position, that is, the initial position of the operating lever is adjusted. The rotation start position of the cam 96, that is, the initial position of the cam 96 is determined by the initial position of the actuating lever 97 adjusted at this time. The initial position of the cam makes the hand cart 1 a traveling type at all times. The non-running type is selected.

For example, in the hand truck 1 having the brake 9 shown in FIG. 7, when the cam 96 sets the position shown in FIG. 7 as the initial position, the hand truck 1 brakes at the original position of the brake lever 7. There drivable state not activated (always running type), and in the case (for example, FIG. 7 in which the cam 96 in the opposite to the initial position state to separate the brake shoe 92 and 92, pivoted in the counterclockwise direction When it is locked), the hand truck 1 is in a non-travelable state (always non-traveling type) in which the brake 9 is operated in the original position of the brake lever 7 where the brake lever 7 is not operated.

Therefore, the hand truck 1 according to the present invention has the connecting rod 82 and the nuts 86, 86 screwed to the connecting rod 82.
Etc. as the adjusting means, and the operating lever 97 is operated by this adjusting means.
By adjusting the position of (1), that is, by setting the initial position of the cam 96 to a desired position, it can be used as either the always traveling type or the always non-traveling type handcart 1.

In the hand-carrying vehicle 1 adjusted to the always running type as described above, the hand-carrying vehicle 1 is gripped by the handle 7 to push or pull the hand-carrying vehicle 1 for traveling, and the brake lever is used when stopping or decelerating. By gripping 7 and pulling it toward the grip portion 63 of the handle 6, the cart 1 can be decelerated or stopped.

On the other hand, a hand cart 1 which is always non-traveling type
In this case, the brake lever 7 is gripped and moved in a direction approaching the grip portion 63 of the handle 6, and in this state, the hand truck 1 is pushed or pulled to push the hand truck 1
It is possible to stop or decelerate the hand cart by moving or releasing the brake lever 7 at the time of stopping or decelerating.

When the operating lever 97 can be slid at a relatively wide angle by operating the brake lever 7, for example, when the operating portion 71 of the brake lever 7 is separated from the grip portion 63 of the handle 6, the brake is operated. 9
It took state previously adjusted to (a state of being rotated cam 96 in a counterclockwise direction in FIG. 7), while being released brakes grip the brake lever 7 (cam 96 is shown in FIG. 7 of (While in the position), the cart 1 is allowed to run, and the brake lever 7 is gripped more strongly to approach the grip portion 63 of the handle 6 and the brake is applied again (the cam 96 rotates clockwise in FIG. 7). It is also possible to adjust so that the hand cart 1 can be braked in a state in which it is rotated in the direction of.

In the hand truck 1 with a brake mechanism of the present invention constructed as described above, the brake lever 7 is used.
The operating portion 71 of the gripping portion 63 when facing the handle 6.
Because it is located in the front of the
The hand truck 1 facilitates simultaneous operation of running and braking, and the brake lever 7 in the hand truck 1 of the present invention is also provided.
Even if the handle 6 is folded to the state shown by the chain double-dashed line in FIG. 1 depending on the mounting position of the handle 6, the brake lever 7 does not collide with the surface of the luggage carrier 2 to operate, and the bent portion of the handle 6 does not move. The brake lever 7 surrounded by 61a, 62a and the grip portion 63 and guarded can prevent a person, an object, or the like from colliding with the brake lever 7 to malfunction.

In the above-described embodiment, the hand truck 1 of the present invention has been described as the handle 6 being foldable, but the hand truck 1 of the present invention has the handle 6 as shown in FIG. The present invention is also applicable to the hand cart 1 which cannot fold.

As shown in FIG. 12, the cart 1
When the handle is configured to be unfoldable, the connecting means 8 does not necessarily have to be bendable, and is formed only by the connecting rod instead of the structure of the connecting member 8 including the chain 83. You may comprise by a connection member.

[0073]

With the configuration of the present invention described above, it is possible to provide a hand-carrying vehicle equipped with a brake mechanism that can be appropriately selected as either a constantly traveling type or a constantly non-traveling type. .

Further, by using the connecting means using the chain, the hand cart with the brake mechanism according to the present invention can fold the handle, and is similar to the conventional brake mechanism using the connecting mechanism such as the wire. It became hard to get mad and damaged.

Further, the hand cart with the brake mechanism according to the present invention can be easily operated and the malfunction of the handle can be prevented when the handle is folded by devising the mounting position of the brake lever. did it.

In addition, by forming the brake integrally with the caster, by replacing the caster, attaching the brake lever and the connecting means, and providing an opening for inserting the connecting means in the cargo bed, the existing manual push Other parts can be shared with the carrier, relatively easy to manufacture,
And relatively inexpensive Te押with the brake mechanism and can provide a luck搬車.

[Brief description of drawings]

FIG. 1 is a front view of a hand truck according to an embodiment of the present invention.

FIG. 2 is a right side view of FIG.

FIG. 3 is an enlarged view of a handle.

FIG. 4 is a rear view of the fixed caster.

5 is a sectional view taken along line VV of FIG.

FIG. 6 is a plan view of FIG.

FIG. 7 is an explanatory diagram showing a configuration example of a brake.

FIG. 8 is a front view of a brake lever.

9 is a left side view of FIG.

FIG. 10 is a view on arrow A of FIG.

FIG. 11 is a front view showing a configuration example of a connecting unit.

FIG. 12 is a front view of another hand truck according to the present invention.

FIG. 13 is a front view of a conventional hand truck.

FIG. 14 is an explanatory view of a conventional hand truck.
(A) is a front view and (B) is an enlarged view of a brake part.

FIG. 15 is an explanatory view of a conventional hand truck.
(A) is a perspective view and (B) is an enlarged view of a brake part.

[Explanation of symbols]

1 hand truck 2 loading platform 22 Through hole 3a, 3b casters 31 York 4a, 4b fixed casters 41 York 41a Yoke side wall 41b Upper surface of yoke 42 wheels 43 bolt holes 44 shaft 45 bearing 46 cover 6 handles 61,62 rod (perpendicular to the handle) 61b, 62b Vertical part 61a, 62a bent portion 63 Grip (of handle) 64 fixing bracket 65 holes 66 locking rod 7 Brake lever 71 Operation part 72 Brake lever post 73 Bearing hole 74 Swing part 75 Connection hole 8 connection means 81,82 connecting rod 83 chains 85 spring 86 nuts 9 brakes 91 drums 92 Brake shoes 93 Brake lining 94 Return spring 95 anchor pin 96 cam 97 Actuating lever 98 Connection hole

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) B60T 7/08 B60T 11/08 B62B 5/04 B62B 5/06

Claims (5)

(57) [Claims] 1. A caster attached to the back surface of a substantially flat rectangular loading platform, and a handle provided upright on the surface of the loading platform at one edge of the loading platform, and rotating wheels provided on the caster. A brake mechanism including a restricting brake, a brake lever attached to the handlebar, and a connecting unit that operates the brake by the brake lever, wherein the brake includes a cam that operates the brake. The cam is made rotatable by the movement of the lever via the connecting means and the operating lever interlocked with the connecting means, and at the same time, the initial position of the operating lever at the original position of the brake lever is set by the cam to rotate the wheel.
The position that regulates rolling, or the rotation of the wheels
A hand cart with a brake mechanism, which is adjustable at any one of the following positions . 2. A handle is provided at the base end of the brake lever.
2. The hand pusher with a brake mechanism according to claim 1, wherein the brake lever is located outside the cargo bed, and the operation portion of the brake lever is arranged at substantially the same height as the grip portion of the handle on the cargo bed side. Carrier. 3. A base end portion of the handle is pivotally supported so as to be foldable toward the surface direction of the luggage carrier, and at least the connecting means at a position corresponding to the shaft support position of the handle is connected to a chain. The hand truck with a brake mechanism according to claim 1 or 2, wherein the hand truck has a brake mechanism. 4. The handle is provided with two rods which are positioned in a substantially vertical direction with respect to the luggage carrier and which face each other in a width direction of the handle, and the two rods are perpendicular to the luggage carrier. A vertical portion and a bent portion formed by bending the upper end of the vertical portion to be bent toward the outside of the loading platform are formed, and the operation portion of the brake lever is formed by extending the vertical portion and the bent portion. The vehicle with a brake mechanism according to claim 3, wherein the vehicle is located in a defined space. Wherein said calibration on the brake in the caster
The pushcart with a brake mechanism according to any one of claims 1 to 4, wherein the pushcart is formed integrally with the star .