KR102330895B1 - Rear cars equipped with advertisements and brakes - Google Patents

Abstract

The present invention relates to a multi-functional handcart having a braking means, which performs steering and braking functions based on an improved structure where wheels at both sides can be independently braked, thereby ensuring greatly enhanced operability and safety and additionally has a structure where a braking state can be selectively locked or released to maximize convenience of steering and operation and allow a publicity panel or an advertising panel to be readily attached at various locations thereof. The multi-functional handcart of the present invention comprises: a loading unit (10) for accommodating a cargo; wheels (20) disposed at both sides of the loading unit; a pair of left and right gripping units (30) extended horizontally from a rear side of the loading unit; a pair of lever units (40) installed respectively on each of the gripping units; a wire (50) connecting the lever unit to the wheel to be withdrawn or led in dependent on whether the lever unit operates or not; and a braking unit (60) having a pair of braking pads in a shape of tongs, which are disposed at both rims of the wheel and connected to the wire to pressurize the wheel dependent on whether the lever unit operates or not, thereby inducing braking.

Description

Rear cars equipped with advertisements and brakes}

The present invention relates to a technical idea of a rear car that can conveniently transport cargo loaded by manpower, and more particularly, as the steering and braking functions are exhibited due to the structural improvement that can brake both wheels individually In addition to actively improving operability and safety, the convenience of steering operation is maximized by additionally adopting a structure that can selectively lock or release the braking state. It is about a multifunctional rear car.

In general, a rear car is manufactured for the purpose of transporting loaded cargo easily and conveniently by combining it with the back of a bicycle, and in some cases, a person can pull it directly depending on the situation. Because these rear cars travel at very low speeds, a separate steering or braking system is not required.

Recently, with the rapid development of means of transportation, the rear car has come to be mainly used by the elderly who collect waste paper. However, it was somewhat difficult for the elderly, who lacked strength compared to the younger ones, to control the rear car on rain, snow, or roads with slopes.

Accordingly, a technology capable of braking the rear car in case of an emergency has been developed, and as an example, Utility Model Registration No. 20-0473749 "rear car brake device" is published. In this technology, a support including a contact pad is rotatably installed at the rear of the rear car wheel, and the braking device is connected to an operating lever provided on the rear car handle by a wire, and the contact pad of the support rotates due to the operation of the operating lever. It is a technology that brakes by contacting the wheel.

However, in the above technology, since the contact pad presses the ground friction surface of the wheel to apply braking, the braking force is not good and the braking distance is long. It was accompanied by several problems.

On the other hand, as another example of the technology related to a rear car equipped with a braking system, published Utility Model Publication No. 20-1998-0026862 "Brake system for a rear car", the technology installs an oil cylinder on the front and rear lower sides of the rear car frame And by installing a roller at the bottom of the piston rod, the hydraulic pressure generated by tilting the rear car frame is supplied to the hydraulic brake to obtain braking force. In addition, this technology is a technology that prevents rotation in one direction by a ratchet wheel and a ratchet on the tire rotation shaft, but can rotate in a direction that cannot be rotated by reversing the position of the ratchet.

The technology does not directly brake the wheel, but by tilting the frame, the hydraulic brakes disposed at the front and rear of the frame are braked while being pressed by the ground. In this way, there is a high possibility that the rear car will overturn due to the force of the wheels and the inclination of the frame to continuously rotate due to driving. Because the distance is long and the hydraulic brake is directly rubbed against the uneven ground, it is accompanied by problems such as severe wear.

Accordingly, the present invention has developed a rear car that has excellent braking power, but can improve the overall structure to minimize wheel wear or damage during the braking process, and more conveniently and easily manipulate steering.

Utility Model Registration No. 20-0473749 "Rear car brake system" Public Utility Model Publication No. 20-1998-0026862 "Rear car brake system"

The present invention was created to more actively solve the above problems, and it is a main task to provide a multifunctional rear car that can actively prevent safety accidents by exhibiting excellent braking power without damaging the wheels or the tires covering the same. .

Another object of the present invention is to provide a multifunctional rear car capable of convenient braking operation and easy steering operation by providing a function to lock or release the braking state by improving the operation structure of the braking system.

In addition, the present invention is to provide a multifunctional rear car that can actively promote the safety of users by not only exhibiting various promotional effects by configuring the advertisement panel or identification member in a structure that can be easily installed, but also identifying the vehicle from a distance. It is another solution.

In order to achieve the above-mentioned problem, the configuration of a multi-function rear car equipped with a braking means proposed in the present invention is as follows.

The rear car of the present invention includes a loading part 10 for accommodating cargo, wheels 20 provided on both sides of the loading part, a pair of left and right gripping parts 30 horizontally extending from the rear surface of the loading part, and each gripping part A pair of installed lever units 40, a wire 50 that connects the lever unit and the wheel, and is drawn out or stretched depending on whether the lever unit is operated, and two sets of brake pads in the form of tongs are provided on both sides of the wheel. It is arranged on the rim, and it is characterized in that it is composed of a braking unit (60) that is connected to a wire and induces braking by pressing the wheel according to the operation of the lever unit.

In addition, the braking unit 60 is disposed inside the wheel 20 and is connected to the wire 50 to apply a frictional force to the inner rim of the wheel according to the operation of the lever unit 40. A first braking unit 61 is provided. and a second braking unit 62 that is hingedly coupled to the first braking unit and disposed on the outside of the wheel to apply frictional force to the outer rim of the wheel according to the operation of the lever unit.

In addition, the lever unit 40 is coupled to the gripping part 30 and includes a body part 41 that winds and embeds a part of the wire 50 in the form of a mainspring, and is rotatably installed from the body part and is connected to the wire for rotation operation. It is characterized in that it is composed of a manipulation unit 42 that allows the wire to be wound or unwound according to the.

In addition, the loading unit 10 is characterized in that the promotional panel 80 is installed on one or more sides.

On the other hand, the body part 41 further includes a clutch part 70 for winding or unwinding the wire 50 due to the operation of the operation part 42 , and the clutch part 70 is a winding in which the wire is wound. A winding having a roller 71, a plate 72 installed in close contact with the upper end of the winding roller to align the wound wire, and teeth 73a formed in one direction on the outer circumferential surface and coupled to the winding roller in a state disposed on the plate top. Gear 73, a clutch 74 that is rotatably installed at a position adjacent to the take-up gear and rotates or brakes the take-up gear according to the direction of engagement by the teeth, and is installed and rotated in a tensioned state in the rotation direction of both sides of the clutch It is characterized in that it consists of a pair of springs (75) for continuously returning the clutch to its original state.

On the other hand, in the winding gear 73, teeth 73a are formed along the outer circumferential surface of the fixed section 73-1 in which the chain engagement of the clutch 74 is induced, and the teeth in a certain range are removed to release the engagement of the clutch. At the same time, it is characterized in that it is composed of an unwinding section (73-2) for inducing a change of direction of the winding gear.

On the other hand, in the clockwise direction, the upper surface of the tooth 73a is formed of a curved portion 73a-1 and the lower surface is formed of a right-angled portion 73a-2, and the clutch 74 includes a right-angled portion on the upper side of the tip and When the winding gear 73 rotates in the clockwise direction, the right-angled projection 74a has a shape corresponding to the shape corresponding to the curved surface, and the lower end of the tip has a curved surface when the winding gear 73 rotates in the counterclockwise direction. It is characterized in that it is composed of a curved protrusion (74b) that induces continuous rotation on the ride.

According to the present invention having the above-described configuration, since the braking unit presses both rims of the wheel to brake, the tire is not worn or damaged to ensure long life, and furthermore, the friction part of the tire is actively preserved to ensure safe driving. possible effect.

In addition, the present invention has another effect of actively improving the convenience of operation, such as convenient braking operation as well as steering operation, because the braking state can be selectively locked or released due to the braking method using the clutch method. .

In addition, since the present invention can easily attach and detach an advertisement panel or an identification member to the loading part, there is another effect of promoting safe driving as the rear car can be grasped from a long distance as well as various promotional effects.

1 is a perspective view of a rear car configured according to a preferred embodiment of the present invention.
Figure 2 is a side view of the rear car proposed by the present invention.
Figure 3 is a partial perspective view showing detailed information of the grip portion and the lever unit.
Figure 4 is an exploded perspective view of the lever unit proposed by the present invention.
Figure 5 is a side view of the grip portion and the lever unit proposed by the present invention.
6 and 7 are diagrams of the use state sequentially showing the operation state of the lever unit.
8 is a perspective view showing a state in which an advertisement panel or an identification member is attached to the loading unit proposed by the present invention.

Hereinafter, with reference to the accompanying drawings, it will be collectively described for the configuration of the present invention and the resulting action and effect.

Advantages and features of the present invention, and a method for achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only this embodiment serves to complete the disclosure of the present invention, and common knowledge in the technical field to which the present invention pertains It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. In addition, like reference numerals refer to like elements throughout the specification.

The present invention is disclosed with respect to the technical idea of a rear car capable of conveniently transporting cargo loaded by manpower.

Above all, the present invention not only actively improves operability and safety as steering and braking functions are exhibited due to structural improvement that can brake both wheels individually, but also selectively locks or releases the braking state It should be noted that the convenience of steering operation is maximized and that it relates to a multifunctional rear car equipped with a braking means capable of easily attaching a promotional panel or an advertisement panel to various positions.

1 is a perspective view of a rear car constructed according to a preferred embodiment of the present invention, and FIG. 2 is a side view of a rear car proposed by the present invention.

1 and 2, the rear car 100 of the present invention includes a loading part 10 in which cargo is accommodated, a wheel 20 provided on both sides of the loading part, and a pair of left and right gripping parts extending horizontally from the rear surface of the loading part. (30), in particular, a pair of lever units 40 installed in each gripper to selectively apply braking force to the wheel while driving, and the lever unit and the wheel, and connect the lever unit to the wheel, depending on whether the lever unit is operated or not. A brake unit (60) in which a wire 50 to be drawn out or tensioned and two sets of brake pads in the form of tongs are disposed on both rims of the wheel and connected to the wire to press the wheel according to the operation of the lever unit to induce braking ) is further included.

The loading part 10 bends a round or square pipe several times to form a hexahedral rear car base frame, and by installing thin plates on the side, back, and bottom surfaces except for the front and top of the base frame, respectively, the cargo can be accommodated. It refers to a structure that has secured space. On the other hand, the loading part 10 is provided with a horizontal axis on the bottom surface to induce the installation of the wheel 20 to be described later.

The wheel 20 is made of a combination of a circular wheel made of iron and a tire made of rubber surrounding the edge of the wheel, and is rotatably installed one place on each side by the shaft provided in the loading part 10, A rolling motion is attempted from the ground to induce a smooth positional movement of the loading part.

The holding part 30 is made of a circular or square pipe of the same material as the loading part 10, and as it is installed extending in the longitudinal direction from the rear surface of the loading part, the user's grip is induced. The user attempts to drive by pushing or pulling the rear car while holding the gripper 30 . The holding part 30 extends horizontally for a set distance from the upper left corner on the rear surface of the loading part 10, and is again bent at right angles to the right side to extend as much as the width of the loading part, and is again bent at right angles to the right side to load It is connected to the upper right corner of the back of the part. It is composed in the form of '⊃' as a whole.

And as shown in the figure, lever units 40 are installed on both sides of the gripping part 30, respectively, brake units 60 to be described later are installed on both wheels 20, respectively, and wires 50 extending from the lever units ) is combined with the braking unit. In the rear car 100 having the above-described coupling structure, the brake unit 60 is pressurized or returned to its original position while the wire 50 is pulled or pulled out depending on whether the lever unit 40 is operated, and the wheel 20 is braked.

Figure 3 is a partial perspective view showing detailed information of the grip portion and the lever unit.

As shown in Figure 3, the lever unit 40 is coupled to the gripping part 30 and the body part 41 for winding and embedding the wire 50 in the form of a mainspring, and the user's pressing operation to unwind the wire wound on the body part. Alternatively, it is divided into an operation unit 42 that allows it to return to its original state.

The body part 41 is coupled to the gripping part 30 in a clamping manner, and is firmly constrained to the gripping part by a fixing bolt provided in the clamp region to be fastened to the body part, and by adjusting the fixing bolt loosely according to the situation, the body It can be used by firmly adjusting the installation position and angle of the part.

The body portion 41 includes a clamp-type connecting rod 41a coupled to the gripping unit 30 , and a supply stand formed at the lower end of the connecting rod to receive the wire 50 penetratingly and deliver the penetrating end to the operation unit 42 . (41b) consists of. The supply stand 41b has a built-in clutch unit 70 to be described below, and a portion of the wire 50 penetrated by the clutch unit is wound and accommodated in the form of a mainspring.

The manipulation unit 42 is made in the form of a handle that can be stably gripped by a user, and is installed to be rotatable at a predetermined angle on the rear surface of the body unit 41 . As mentioned in the description of the body part 41 , the manipulation unit 42 has the end of the wire 50 wound on the feeder 41b coupled with it, so that the user can use the manipulation unit 42 together with the holding unit 30 . ), the control unit rotates counterclockwise, and as the wire is pulled by the rotation of the control unit, the brake unit 60 finally performs the braking operation.

The wire 50 is a general wire sold on the market, one end of which is constrained by the operation unit 42 of the lever unit 40, passes through the supply stage 41b, but is installed in the supply stage by the clutch unit 70 built-in. The wire wound in the form of a part of the mainspring and passing through the feeder passes through the base frame of the loading unit 10 in a close contact state and finally passes through the first braking unit 61 of the braking unit 60 to pass through the second It is coupled and constrained to the braking unit 62 . The wire 50 is pulled a predetermined distance by the pressing operation of the operation unit 42, and the pulling of the wire operates the brake unit 60 at the same time as the clutch unit 70 operates to operate the left and right rims of the wheel 20 press the

The braking unit 60 is connected to and coupled to the wire 50 extending from the lever unit 40, and operates while the wire is pulled or released depending on whether the operation part 42 of the lever unit is operated to brake the wheel 20. make it The braking unit 60 includes a first braking unit 61 disposed inside the wheel 20 and a second braking unit 62 disposed outside the wheel, and the first braking unit and the second braking unit 60 are provided. The brake unit is composed of a structure in the form of tongs that can rotate with each other and presses the rims of both sides of the wheel.

In detail, reference may be made to an enlarged view of the braking unit 60 of FIG. 2 , the first braking unit 61 being disposed on the inner rim of the wheel 20 and through which the wire 50 penetrates, and disposed on the outer rim of the wheel and a second braking unit 62 that restrains the end of the wire passing through the first braking unit. Of course, when the operation unit 42 is pressed and rotated, the second braking unit 62 is pulled by the first braking unit 61 by the wire 50 to press the rims on both sides of the wheel 20 to brake the wheel. make it

4 is an exploded perspective view of the lever unit proposed by the present invention. In particular, the present invention has provided a braking maintenance function that allows the user to selectively lock or release the braking state through improvement of the overall structure of the lever unit.

As shown in FIG. 4 , the body part 41 has a built-in clutch part 70 for loosening or returning the wire 50 due to the operation of the manipulation part 42 .

The clutch unit 70 includes a winding roller 71 on which the wire 50 is wound by a predetermined amount, a plate 72 that is installed in close contact with the upper end of the winding roller to align the wound wire, and is disposed on the top of the plate and is coupled to the winding roller It is composed of a take-up gear 73 for inducing rotation of the take-up roller, a clutch 74 for selectively braking the take-up gear, and a spring 75 for always returning the clutch after the operation has been completed.

The winding roller 71 is rotatably installed inside the supply table 41b through a shaft penetrating the center in a circular plate shape. After the wire 50 eccentrically penetrates both sides of the winding roller 71 , the penetrating end portion is restrained by the manipulation unit 42 . As the winding roller 71 penetrates the wire 50 in an eccentric state, the wire is pulled when the operation unit 42 is operated. In addition, since the wire 50 is in a state in which the tension is always maintained, when the operation force of the operation unit 42 is released, the rotational position of the winding roller is immediately returned to its original state by the tension of the wire.

The plate 72 is made in the shape of a disk, and is disposed on the winding roller 71 to align the wound wire 50 and at the same time prevent unwanted loosening of the wire. The plate 72 is not coupled to the winding roller 71, but is simply fitted to a shaft formed in the center of the winding roller and does not rotate together with the winding roller.

The winding gear 73 is coupled with the winding roller in a state disposed on the upper end of the plate 72 to rotate together, and in particular, has teeth 73a formed in one direction on the outer circumferential surface. The winding gear 73 controls rotation and restraint of the winding roller 71 in combination with a clutch 74 to be described later. The winding gear 73 has a fixed section 73-1 in which a chain engagement of the clutch 74 is induced by forming teeth 73a along an outer circumferential surface, and a predetermined range of teeth are removed to take up the clutch simultaneously with the engagement release. It is composed of a loosening section (73-2) for inducing a change in the direction of the gear (變向).

In particular, the tooth shape 73a of the winding gear 73 includes a curved portion 73a-1 on the upper surface and a right angle portion 73a-2 on the lower surface in a clockwise direction.

The clutch 74 is rotatably installed at a position adjacent to the take-up gear 73 and serves to rotate or brake the take-up gear according to the engagement direction with the teeth 73a. The clutch 74 has a shape corresponding to the upper distal end right-angled portion 73a-2, and includes a right-angled protrusion 74a that engages and fixes each other when the winding gear 73 rotates clockwise, and a lower distal end curved portion. It is composed of a shape corresponding to (73a-1) and is composed of a curved protrusion (74b) that induces continuous rotation on a mutually curved surface when the winding gear rotates in the counterclockwise direction.

The spring 75 is installed in a tensioned state in the rotation direction of both sides of the clutch 74 and serves to continuously return the rotated clutch to its original state. The spring 75 is connected to the upper end of the clutch 74 and the inner upper portion of the supply stand 41b, and as an elastic force for the upward rotation of the clutch is given, the first spring 75a induces normal return after upward rotation. and a second spring (75b) connected to the lower end of the clutch and the inner lower part of the supply table to induce a normal return after the downward rotation as an elastic force is applied to the downward rotation of the clutch.

5 is a side view of the holding part and the lever unit proposed by the present invention, and FIGS. 6 and 7 are diagrams in use sequentially showing the operation state of the lever unit.

5 to 7 , in the rear car 100 of the present invention, the braking force may be strengthened, the braking force may be maintained, or the braking force may be released depending on the degree of the pressing operation of the lever unit 40 .

As shown in the figure, when the operation part 42 of the lever unit 40 is pressed, the wire 50 is gradually pulled, so that the winding roller 71 and the winding gear 73 rotate together in a counterclockwise direction. As shown in FIGS. 5 and 6, the tooth shape 73a of the winding gear 73 rides the curved protrusion 74b of the clutch 74 and rotates counterclockwise while the operation part 42 is pressed while the wire 50 is continuously rotated. ) is wound. Accordingly, the second braking unit 62 of the braking unit 60 is continuously pulled by the first braking unit 61 to apply frictional force to the wheel 20 .

After that, when the pressing operation of the manipulation unit 42 is released, the right angle projection 74a of the clutch 74 meshes with the right angle part 73a-2 among the teeth 73a of the winding gear 73, so that the winding gear By blocking the clockwise rotation, the wire 50 is prevented from being unintentionally unwound. As a result, since the wire 50 is wound around the clutch part 70 , the braking unit 60 also maintains the braking force for pressing the wheel 20 .

On the other hand, as shown in FIG. 7 , while attempting a press operation to the extent that the manipulation unit 42 comes into contact with the holding unit 30 , the winding gear 73 is rotated counterclockwise while the wire 50 is pulled within the maximum allowable range, and the winding The clutch 74, which was located in the fixed section 73-1 of the gear, is changed to the unwind section 73-2 of the winding gear, so that the occlusal force between the right-angled portion 73a-2 and the right-angled projection 74a is completely released. .

And when the pressing operation of the operation unit 42 is released, the winding gear 73 is rotated clockwise by the wire 50 maintaining uniform tension between the wheel 20 and the lever unit 40. At this time, the tooth shape of the winding gear As the 73a faces the curved protrusion 74b of the clutch 74, continuous rotation is made without jamming and returns to its original position. ) can be driven.

8 is a perspective view illustrating a state in which a promotional panel or an identification member is attached to the loading unit proposed by the present invention.

As shown in FIG. 8 , the rear car 100 of the present invention may have a promotional panel 80 attached to all surfaces of the loading unit 10 . Accordingly, various promotional effects can be expected by simply driving the rear car 100 .

On the other hand, the rear car 100 of the present invention can be driven by attaching various identification members as well as the promotional panel 80, and in particular, by adopting a luminous member as an identification member, the rear car and the user using the same can be safely secured from the vehicle regardless of day or night. to secure

Since the rear car 100 of the present invention configured as described above is a method in which the braking unit 60 presses both rims of the wheel 20 to brake, the tire is not worn or damaged to ensure a long lifespan, and furthermore, the tire The friction area is actively preserved, enabling safe driving.

In addition, due to the braking method utilizing the clutch method, it is possible to selectively lock or release the braking state, thereby actively improving the convenience of operation, such as convenient braking operation as well as easy steering operation.

In addition, since the promotion panel 80 or the identification member can be easily attached to and detached from the loading unit 10, various promotional effects as well as the identification of the rear car 100 from a long distance are possible, thereby promoting safe driving.

Although the present invention described above has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and various modifications and equivalent other embodiments are possible by those skilled in the art. should be made clear. Accordingly, the true technical protection scope of the present invention should be construed by the appended claims, and all technical ideas within the equivalent scope should be construed as being included in the scope of the present invention.

10. Loading part 20. Wheel
30. Gripping part 40. Lever unit
50. Wire 60. Braking unit
70. Clutch 80. Promotional panel
100. Lear Car

Claims (5)

A loading part 10 for accommodating cargo, wheels 20 provided on both sides of the loading part, a pair of left and right gripping parts 30 extending horizontally from the rear surface of the loading part, and a pair installed in each gripping part The lever unit 40, the wire 50 that connects the lever unit and the wheel and that is drawn out or tensioned depending on whether the lever unit is operated, and two and one set of brake pads in the form of tongs are arranged on both rims of the wheel and the wire and a braking unit 60 connected with the lever unit to induce braking by pressing the wheel according to the operation of the lever unit, wherein the lever unit 40 is coupled to the gripper 30 and winds a part of the wire 50 in the form of a mainspring. In the rear car consisting of; and the body part 41 to be built-in;
The body part 41 further includes a clutch part 70 for winding or unwinding the wire 50 due to the operation of the operation part 42 , and the clutch part 70 includes a winding roller 71 on which the wire is wound. ), a plate 72 installed in close contact with the upper end of the winding roller to align the wound wire, and a winding gear 73 having teeth 73a formed in one direction on the outer circumferential surface and coupled to the winding roller in a state disposed on the top of the plate. ), a clutch 74 that is rotatably installed at a position adjacent to the take-up gear and rotates or brakes the take-up gear according to the engagement direction of the tooth shape, and the clutch 74 installed in a tensioned state in the rotation direction of both sides of the clutch and rotated continuously It is formed of a pair of springs 75 to return to the original state,
The winding gear 73 has teeth 73a formed along the outer circumferential surface to remove the fixed section 73-1 in which the chain engagement of the clutch 74 is induced and the teeth within the set range are removed to release the engagement of the clutch and at the same time as the winding gear. and a loosening section 73-2 for inducing a change in the direction of ), and the clutch 74 has a shape corresponding to a right-angled portion at the upper end of the tip, and a right-angled protrusion 74a that engages and fixes each other when the winding gear 73 rotates in the clockwise direction, and a curved portion at the lower end of the tip. A multifunctional rear car equipped with a braking means, characterized in that it has a shape corresponding to the and is composed of a curved projection (74b) that rides on a curved surface and induces continuous rotation when the winding gear rotates counterclockwise.
According to claim 1,
The braking unit 60,
a first braking unit 61 disposed inside the wheel 20 and connected to the wire 50 to apply frictional force to the inner rim of the wheel according to the operation of the lever unit 40;
a second braking unit 62 hingedly coupled to the first braking unit and disposed on the outside of the wheel to apply frictional force to the outer rim of the wheel according to the operation of the lever unit;
A multifunctional rear car equipped with a braking means, characterized in that it consists of.
delete According to claim 1,
The control unit (42) is a multi-function rear car equipped with a braking means, characterized in that the braking state is selectively locked or released while rotating in multiple stages by gear coupling with the body part (41).
According to claim 1,
The loading part (10) is a multifunctional rear car equipped with a braking means, characterized in that the promotional panel (80) is installed on at least one side.

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