KR101988519B1 - Treadmill for pet - Google Patents

Abstract

The present invention relates to a pet treadmill for automatically and safely training a pet which firstly uses a treadmill or has low adaptability. The pet treadmill of the present invention comprises: a pedestal; a treadwheel having a driving rail formed on an outer circumference thereof, and rotatably installed on an upper portion of the pedestal; a driving rail shield for shielding a space between the driving rail of the treadwheel and the pedestal; a driving member for providing a power mode for transmitting a driving force to the driving rail to rotate the treadwheel in a forward or reverse direction, and a non-power mode for rotating the treadwheel rotated by the power mode in a reverse direction thereof by self-weight of a pet; and a sensor for sensing a rear elevation of a predetermined height of the pet in a forward power mode of the treadwheel to output a stop signal to the driving member. Therefore, the pet treadmill of the present invention has a very useful effect to allow the pet which firstly uses the treadmill or has low adaptability to be easily adapted to a walking or running training by repeating a step of moving the pet by a predetermined angle in the power mode and then allowing the pet to return an original position by self-weight in the non-power mode.

Description

Treadmills for pets {TREADMILL FOR PET}

The present invention relates to a treadmill for training pets such as dogs or cats, and more particularly to a treadmill for pets that can automatically and safely be trained for first-use or less adaptable pets.

As is well known, a pet treadmill is a device for walking or running a pet including a dog or a cat, and is widely used for exercising a pet to manage weight and health.

As a prior art related to a pet treadmill, Korean Patent Laid-Open No. 10-2015-0097983 (Publication date: 2015.08.27) 'Pet treadmill' and Korean Registered Utility Model 0242206 (Registered on July 30, 2001 ) And the like are disclosed.

The prior art described above is a configuration in which a pet walks or runs on a belt 43 on an endless track so that a pet that is used for the first time or whose adaptability is low can adapt to the training to walk or run on the belt 43, There was a difficult problem.

In other words, pets that are used for the first time or that are not adaptable can get injured in the body by walking back and forth in fear of walking or running, depending on the speed of the belt, which makes it difficult to adapt to training.

As a prior art related to a pet treadmill, Korean Patent Laid-Open Publication No. 10-2016-0088077 (Publication date: 2016.07.25) "Pet exercise machine" is disclosed, and in the representative claim 1, As a matter of fact, "a cylindrical rotating body with open ends at both ends; A guide unit positioned to contact with an inner circumferential surface of the rotary body and guiding a rotation path of the rotary body; And a support unit for fixing the position of the guide unit at a predetermined height. ≪ Desc / Clms Page number 2 >

However, since the prior art requires the pet to walk or run by itself in the rotating body without providing power, there is a problem in that a pet which is used for the first time or is not adaptable is difficult to adapt to training.

(Prior Art 0001) Korean Patent Laid-Open No. 10-2015-0097983 (Publication date: 2015.08.27) (Prior Art 0002) Utility Model No. 0242206 registered in Korea (Registered Date: July 30, 2001) (Prior Art 0003) Korean Patent Laid-Open No. 10-2016-0088077 (Published date: July 25, 2016)

The present invention has been made to solve the conventional problems as described above, and it is an object of the present invention to provide a treadmill for a pet which can be easily adapted to a walking or running training of a pet used for the first time or having low adaptability have.

According to an aspect of the present invention, A caster wheel having a drive rail formed on an outer periphery thereof and rotatably installed on the pedestal; A drive rail shield for shielding a space formed between the drive rail of the wheels and the pedestal; A driving member for providing a power mode for transmitting the driving force to the driving rails to rotate the wheels in forward or backward directions and a non-driving mode for rotating the wheels rotated in the power mode in the opposite direction due to the weight of the pet; And a sensor for sensing a rear rise of a predetermined height of the pet when the bicycle is in the forward power mode and outputting a stop signal to the driving member.

In the present invention, the pedestal may include a housing having an installation space, and a cover coupled to cover an installation space of the housing and having an arc-shaped rolling sliding surface that does not interfere with rotation of the wheels on the upper surface, The rail shield may be provided at the front end and the rear end of the cover, respectively, so as to shield a space formed between the driving rails of the wheels and the rolling sliding surface of the pedestal.

The guide rail may include a guide rail formed on an outer circumference of the wheel, and a guide rail shield that shields a space formed between the guide rail and the pedestal. The guide rail shield may be disposed between the guide rails of the wheels and the rolling sliding surface of the pedestal Respectively, to shield the space formed in the upper surface of the cover.

A front guide wheel rotatably provided in front of the rolling sliding surface of the cover and guiding the slide of the guide rail in front of the front guide wheel; And may further include a guiding rear guide wheel.

The guide rail may be curved at a predetermined curvature in front of the rolling sliding surface of the cover to guide the slide of the guide rail forward. The guide rail may be curved at a predetermined curvature behind the rolling sliding surface of the cover, And a rear guide rim guiding from the rear side.

The driving unit may further include a balance wheel rotatably installed in the installation space of the housing and guiding the balance of the driving rail in a rearward direction of the driving rail. The driving member may be rotatably installed in the installation space of the housing, And a driving motor connected to the driving wheel to drive the driving wheel. The driving wheel hole is formed in the front of the cover so as to allow the driving wheel to pass therethrough, A balance wheel hole can be formed.

In the present invention, it is preferable that the sensing sensor senses a backward rise of a predetermined height of the pet at intervals of 0.5 to 2 seconds.

The present invention may include a laser pointer for emitting a laser beam to the inner front surface of the wheel, and a fixed arm for positioning the laser pointer on a rear upper portion of the wheel, wherein the fixed arm is provided with a laser pointer A curved portion connected to a lower end portion of the fixing portion and curved at the same or similar curvature as the rear edge of the wheel, As shown in FIG.

The safety fence may include a safety fence detachably coupled to the pedestal so as to prevent the detachment of the pet from the left and right open ends of the wheel, and a binding bar to bind the safety fence to the outside of the wheel, A hook may be formed at both ends of the binding bar, and a barhole may be formed at an outer edge of the safety fence so that the hook is engaged.

According to the present invention, which is implemented by the above-mentioned solution, the pet is moved at a predetermined angle in the power mode, and then the pet is returned to its home position in its non-powered mode. There is a very useful effect that can be easily adapted to walking or running training.

In particular, according to the present invention embodied by the above-described solution, the space between the pedestal, the drive rail and the guide rail is shielded by the drive rail shield and the guide rail shield to prevent children's fingers or toes from being caught, And the detection sensor senses an excessive backward rise of the pet which stops or stops from walking on the wheels and pauses or stops, thereby stopping the driving member, thereby preventing injury due to overturning or departure of the pet.

1 is a perspective view of an embodiment of the present invention;
2 is a side view according to an embodiment of the present invention;
3 is an exploded perspective view of a pedestal and a safety fence according to an embodiment of the present invention.
4 is a perspective view of a pedestal according to an embodiment of the present invention;
5 is an exploded perspective view of a pedestal according to an embodiment of the present invention.
6 is a perspective view showing a main portion of a drive rail shield and a guide rail shield according to an embodiment of the present invention;
FIG. 7 is a perspective view of a laser pointer according to another embodiment of the present invention; FIG.
8 is an exploded perspective view of a laser pointer according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings in order to fully understand the present invention.

The embodiments of the present invention may be modified into various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to enable those skilled in the art to more fully understand the present invention.

Therefore, the shapes and the like of the constituent elements shown in the drawings may be exaggerated in order to emphasize a clearer explanation. It should be noted that the same components are denoted by the same reference numerals in the drawings. Further, the detailed description of the functions and configurations of the known art, which are considered to be unnecessarily obscured by the gist of the present invention, will be omitted.

Prior to the description, it is to be noted that the X-axis shown in the figure means 'front-back direction', the Y-axis means 'horizontal direction', and the Z-axis means 'vertical direction'.

A treadmill for a pet according to the present invention comprises a pedestal 10 and a driving rail 21 formed on the outer periphery of the pedestal 10 and including a wheel 20 rotatably mounted on the pedestal 10, a driving rail 21 of the wheel 20, A safety fence 30 for closing the right and left openings S of the wheels 20 to prevent the pet from escaping from the drive rails 21 ) For driving the wheels 20 in the forward or reverse direction and a non-powered mode for rotating the wheels 20 rotated in the power mode in the opposite direction due to the self weight of the pet, And a sensing sensor 60 for sensing the reversal of the pet when the bicycle 20 is in the forward power mode and outputting a stop signal to the driving member 40.

The pedestal 10 supports the wheel 20 and the safety fence 30 on the basis of the present invention and accommodates the driving member 40 and the balance member 70 therein. 4 and 5, the pedestal 10 includes a housing 110 having an installation space 111 and a cover 130 covering the installation space 111 of the housing 110.

The housing 110 is formed in a hollow shape having an open upper part and is provided with an installation space 111 therein. The installation space 111 is provided with a driving member 40 and a balance member 70 do. 5, wheel brackets 112 are provided on both front and rear sides of the installation space 111 so that the driving wheel 45 of the driving member 40 and the balance wheel 71 of the balance member 70, Is rotatably installed.

5, the cover 130 is formed in a plate shape curved at a predetermined curvature so as to cover the open space 111 of the housing 110. The cover 130 is provided on the upper surface thereof with a wheel 20, And a slightly larger arc-shaped rolling sliding surface 131 is formed so as not to interfere with the outer circumference of the wheel 20 when the wheel 20 rotates.

A driving wheel hole 132 is formed on both sides of the front side of the cover 130 so as to penetrate the driving wheel 45 and a balance wheel hole 133 is formed on both sides of the rear side of the cover 130 to allow the balance wheel 71 to pass therethrough.

A front wheel axle 134a is provided at the front center of the rolling sliding surface 131 of the cover 130 so as to face the center of the wheel 20 and a front guide wheel 314 is rotatably mounted on the front wheel axle 134a. And guides the slide on both left and right sides of the guide rail 22, which will be described later, in front of the pedestal 10. The front guide rim 136 is curved at a predetermined curvature at the front center of the rolling sliding surface 131 of the cover 130 to guide the slide of the guide rail 22 in front of the pedestal 10.

A rear wheel axle 135a is provided at the center of the rear of the rolling sliding surface 131 of the cover 130 so as to face the center of the wheel 20 and a rear guide wheel 135 is rotatably mounted on the rear wheel axle 135a. And guide the slides on both left and right sides of the guide rails 22 of the wheels 20 to be described later from behind the pedestal 10. A rear guide rim 137 is curved at a predetermined curvature at the rear center of the rolling sliding surface 131 of the cover 130 to guide the slide of the guide rail 22 from the rear of the pedestal 10.

In particular, a drive rail shield 138 is integrally provided on both left and right sides of the upper surface and the rear end of the cover 130 so that the drive rail 21 of the wheel 20 and the rolling sliding surface 131 of the pedestal 10 A guide rail shield 139 is integrally provided at the front end and the rear end of the upper surface of the cover 130 so as to cover the guide rails 22 of the wheels 20 and the rolling sliding surfaces of the pedestal 10. [ (Not shown). The drive rail shield 138 and the guide rail shield 139 are formed in a space formed between the drive rail 21 and the pedestal 10 to prevent children's fingers or toes from being caught, It is possible to prevent a malfunction of the wheels due to the oversteer.

1 and 2, the wheels 20 are formed into a cylindrical shape so as to communicate with each other in a lateral direction, and the pet may walk or jump inside. The wheels 20 are formed into a substantially cylindrical shape, As shown in Fig.

One or a plurality of driving rails 21 are formed on the outer periphery of the wheels 20 and are rotated by driving the driving member 40. The driving rails 21 are disposed on the outer periphery of the wheels 20, It is preferable that the tires 20 are formed on both left and right edges of the wheels 20, so that the stability of the operation of the wheels 20 during driving can be ensured.

One or a plurality of guide rails 22 are formed on the outer periphery of the wheel 20 so that the driving force of the driving member 40 is not transmitted to the guide rails 22 unlike the driving rails 21 described above The front guide rim 136, the rear guide wheel 135 and the rear guide rim 137 when the left and right flows of the rotating wheels 20 are generated, .

The safety fence 30 is constructed to prevent the pet from escaping using the wheel 20 by closing the opening S communicated to the right and left of the wheel 20, Shaped grille as shown in FIG. 2, so that the flow of air can be smoothly performed, and the appearance of a pet walking or running on the wheel 20 can be visually and easily observed.

1 and 2, the safety fences 30 are coupled to the left and right upper ends of the pedestal 10 to close the lower portion of the opening S communicated with the left and right sides of the wheel 20, respectively. Alternatively, the safety fence 30 may close the upper portion or the center of the opening portion S communicated to the right and left of the wheel 20.

3, the safety fences 30 are detachably coupled to the upper left and right sides of the pedestal 10. To this end, the safety fences 30 are provided with coupling flat portions 31 which are flat and long, An upper portion of the pedestal 130 is provided with an elongated engagement recess 140 so that the coupling recess 31 of the safety fence 30 is detachably coupled.

The safety fences (30) on both sides are bound by the coupling bars (80) so as not to extend outwardly of the wheels (20). The binding bar 80 is formed into a bar shape having a predetermined length, and hook-shaped hooks 81 are integrally provided at both side ends thereof. That is, the hook 81 of the binding bar 80 is coupled to a bar hole 32 formed at the outer edge of the side safety fences 30 to bind the side safety fences 30.

A display 50 is provided at one side of the outer surface of the safety fence 30. The display 50 may be a touch screen capable of touching the user's hand . The display 50 is electrically connected to a PCB substrate (not shown) provided in the installation space 11 of the pedestal 10. For example, the display 50 displays a control signal output from the control unit according to a driving signal of the driving member 40 in letters, numbers, or graphics.

Here, the PCB may be mounted with a receiving unit to receive a control signal remotely output from the remote controller. Alternatively, a communication unit may be mounted on the PCB substrate and connected to the portable terminal through short-range wireless communication including Bluetooth, Zig bee, NFC (Near Field Communication), and WiFi.

A laser pointer 51 for emitting a laser beam 51a to the inner front surface of the wheel 20 is provided at one side of the display 50. [ Referring to FIGS. 1 and 2, the laser pointer 51 can intermittently emit a plurality of laser beams 51a interlocked with the rotation speed of the wheel 20. For example, when one of the plurality of laser beams 51a stops diverging, the other diverges the divergence in turn. Accordingly, the laser pointer 51 can induce the curiosity of the pet to follow the laser beam 51a during training, and can advantageously lead to adaptive capability.

The driving member 40 is configured to provide a power mode for rotating the wheel 20 in either direction and a nonmotor mode for rotating the wheel 20 in the other direction by the weight of the pet, A driving wheel 45 for transmitting a driving force to the driving rail 21 so as to rotate the wheel 20 and a driving motor (not shown) for driving the driving wheel 45.

The driving wheel 45 is installed on the front wheel bracket of the installation space 11 and rubbed against the driving rail 21 of the wheel 20, and the driving force generated by the driving of the driving wheel 45, (21) to rotate the wheel (20). Referring to FIG. 5, the driving wheels 45 are connected to the driving wheel shafts 46 by pairs of left and right driving wheels 45 so as to be frictionally engaged with the both side driving rails 21 of the wheels 20. Here, it is preferable that the driving wheel 45 is made of a synthetic resin material having excellent frictional force, thereby maximizing transmission of driving force.

The drive motor is installed in the installation space 11 of the pedestal 10 so as to be close to the drive wheel 45 and generates power. The drive motor is driven by a belt (not shown) and a pulley (not shown) (45). Here, the drive motor 41 is preferably implemented as a BLDC motor (brushless DC-motor). Since the BLDC motor is easy to control, has low operating noise and excellent electromagnetic compatibility, it can decelerate the initial rotation speed of the wheel 20 at a low speed suitable for the pet type. In addition, the BLDC motor can realize the reverse rotation of the wheels 20 due to the weight of the pet when the power is interrupted.

The present invention further includes a balance member (70) that maintains the front, rear, left and right balance during driving of the wheel (20) by the driving member (40).

The balance member 70 includes a pair of balance wheels 71 sliding along the both side drive rails 21 of the wheels 20 and a balance wheel shaft 72 connecting the balance wheels 71. Here, the balance wheel 71 is made of a synthetic resin material having a low frictional force different from the material of the driving wheel 45, so that the loss of the driving force during rotation of the wheel 20 is minimized.

The detection sensor 60 is configured to detect a rear rise of a predetermined height of the pet when the bicycle 20 is in the forward power mode. The detection sensor 60 is installed on the rear side of the safety fence 30, The control unit 40 detects the pet which is paused or stopped to stop or jumps to the rear in accordance with the rotational speed in the forward power mode and outputs the sensed signal to the driving member 40 for stopping it, It is possible to prevent injuries due to overturning or departure of the pet by the dog.

Here, it is preferable that the sensing sensor 60 senses the signal at a cycle of 0.5 to 2 seconds, because it can prevent errors such as the tails or legs of the pet being briefly detected during walking or running.

The operation of the present invention thus constructed will be described in detail with reference to the accompanying drawings.

First, when the pet is put inside the wheel 20 and the protector comforts the driver, the driving motor 41 is driven so that the belt and the pulley driving wheel 45 are integrally rotated.

Then, the wheels 20 are rotated in the reverse direction R (see FIG. 2) in accordance with the movement of the drive rails 21 rubbed against the drive wheels 45 to form the power mode described above. At this time, the balance wheel 71 supports the rear lower portion of the drive rail 21 to maintain the balance of the wheels 20 in the forward, backward, left and right directions.

When the driving motor 41 is stopped and the driving motor 41 is stopped in the nonmotor power mode, the wheel 20 rotates slowly without stopping due to rotational inertia, and is rotated in the forward direction F by the self weight of the pet inside the wheel 20 , See Fig. 2).

That is, the wheel 20 is rotated in the reverse direction (R) in the power mode to move the pet at a predetermined angle, while in the non-powered mode, the wheel rotates forward (F)

The above-described power mode and non-power mode can be classified into an automatic course, a walking course, a training course, a play course, and a free course according to the training purpose or adaptability of a pet.

For example, the automatic course may be performed in the following manner. That is, after the power mode in which the wheel 20 is rotated 60 ° in the reverse direction at a speed of 6 RPM at the reference position (0 °) where the pet placed on the inside of the wheel 20 is positioned, A second step of repeating the non-operation mode in which the pet is placed in the reference position by turning the wheel 20 at the reference position (0 °), the driving wheel 20 (20 °) after the power mode in which the wheel 20 is rotated 90 ° in the reverse direction at a speed of 6 RPM A second step of repeating the nonmotor mode in which the pet is placed in the reference seat by the forward rotation of the wheel 20 in the forward direction after the power mode in which the wheel 20 is rotated 120 degrees in the reverse direction at a speed of 6 RPM at the reference position A third step of repeating the non-operation mode in which the pet is placed in the reference seat by the forward movement of the wheel 20, and the third step of gradually rotating the wheel 20 for 20 seconds at a speed of 6 RPM to 30 RPM In the fourth step, the wheel 20 is rotated at 30 RPM Maintaining the velocity, and can be carried out in the order of the sixth step of starting the fifth step, the speed of the treadmill 30 RPM for 20 48 seconds to rotate for 10 minutes in a forward direction gradually reduced rotation in the normal direction to 0 RPM.

Alternatively, a laser beam can be emitted from the laser pointer 51 to the inner front surface of the wheel 20 during the training of the cat, thereby improving the adaptive ability by attracting interest in the training of the cat.

When the pet is in the home position and the driving wheel 45 is driven by the driving member 40 when the pet is in the home position in the non-powered mode in the non-powered mode, the wheel 20 rotates in the forward direction Mode, the pet is trained to walk or run in the wheel 20.

At this time, when the pet is paused or stopped without walking or jumping according to the rotation speed of the wheel 20, the sensor is excessively raised to the rear of the wheel 20, and the detection sensor 60 senses the pet, 40, and the driving member 40 stops the driving of the wheel 20 by the stop signal.

7 and 8 are views showing another embodiment of the present invention. FIG. 7 is a perspective view showing a state in which the laser pointer 51 is coupled to the pedestal 10 by a fixed arm 90, and FIG. 8 is a cross- 2 is a perspective view showing a state in which the laser pointer 51 and the fixed arm 90 are separated from the pedestal 10;

Another embodiment of the present invention further includes a fixing arm 90 detachably coupled to the pedestal 10 to fix the laser pointer 51. [

The stationary arm 90 has a fixing portion 91 for fixing the laser pointer 51 so as to be disposed at the rear upper portion of the wheel 20 and a fixing portion 91 for fixing the laser pointer 51 to the lower portion of the fixing portion 91, A curved portion 92 curved in a similar curvature and an engaging portion 93 connected to the lower end of the curved portion 92 and detachably coupled to the arm hole 150 formed on the upper surface of the pedestal 10.

The fixing arm 90 including the fixing portion 91, the curved portion 92 and the coupling portion 93 is bent symmetrically on both right and left sides of a single steel wire and the laser pointer 51 and then the engaging portion 93 is engaged with the arm hole 150 of the pedestal 10 to engage with each other. Accordingly, the laser pointer 51 is disposed at the rear upper portion of the wheel 20 to prevent interference with a pet walking or running, and the curved portion 92 is curved to have the same or similar curvature as the rim of the wheel 20 And thus it does not protrude to the inside or the outside of the wheel 20, so that a unified aesthetic as a whole is produced as shown in FIG.

Alternatively, the fixed arm 90 may be integrally molded by a synthetic resin material to fix the laser pointer 51. [

It will be apparent to those skilled in the art that various modifications and equivalent arrangements may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Therefore, it is to be understood that the present invention is not limited to the above-described embodiments.

Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

10: pedestal 20: wheels
30: safety fence 40: drive member
50: display 60: detection sensor
70: balance member 80: binding bar
90: stationary arm S: open

Claims (9)

Pedestal;
A caster wheel having a drive rail formed on an outer periphery thereof and rotatably installed on the pedestal;
A drive rail shield for shielding a space formed between the drive rail of the wheels and the pedestal;
A driving member for providing a power mode for transmitting the driving force to the driving rails to rotate the wheels in forward or backward directions and a non-driving mode for rotating the wheels rotated in the power mode in the opposite direction due to the weight of the pet;
A sensing sensor for sensing a rear rise of a predetermined height of the pet when the bicycle is in the forward power mode and outputting a stop signal to the driving member;
And a treadmill for a pet. The method according to claim 1,
The pedestal includes a housing having an installation space, and a cover coupled to cover an installation space of the housing and having an arc-shaped cloud sliding surface that is not interfered when the wheels are rotated on the upper surface,
Wherein the drive rail shield is provided at a front end portion and a rear end portion of the upper surface of the cover so as to shield a space formed between the driving rails of the wheels and the rolling sliding surface of the pedestal. The method of claim 2,
A guide rail formed on an outer periphery of the wheel, and a guide rail shield shielding a space formed between the guide rail and the pedestal,
Wherein the guide rail shield is provided at a front end portion and a rear end portion of the upper surface of the cover to shield a space formed between the guide rails of the wheels and the rolling sliding surfaces of the pedestal. The method of claim 3,
A front guide wheel rotatably provided in front of the rolling sliding surface of the cover and guiding the slide of the guide rail in front of the front guide wheel; A pet treadmill further comprising a rear guide wheel. The method according to claim 2 or 4,
A guide groove formed at a predetermined curvature in front of the rolling sliding surface of the cover and guiding the slide of the guide rail in front of the guide groove, a curved guide curved at a predetermined curvature behind the rolling sliding surface of the cover, A treadmill for a pet, further comprising a guiding rear guide rim. The method of claim 2,
Further comprising a balance wheel that is rotatably installed in the installation space of the housing and guides the balance of the driving rail in a rear direction,
The drive member includes a drive wheel rotatably installed in the installation space of the housing to transmit a drive force to the drive rails to rotate the wheels, and a drive motor connected to drive the drive wheels,
And a balance wheel hole is formed in the front of the cover so that a driving wheel hole is formed to allow the driving wheel to pass through and a balance wheel is passed through the rear of the cover. The method according to claim 1,
Wherein the detection sensor senses a backward rise of a predetermined height of the pet at intervals of 0.5 to 2 seconds. The method according to claim 1,
A laser pointer for emitting a laser beam to the inner front face of the wheel, and a fixed arm for positioning the laser pointer on a rear upper portion of the wheel,
The stationary arm includes a fixed portion for fixing the laser pointer to be disposed at a rear upper portion of the wheel, a curved portion connected to a lower end of the fixed portion and curved at a curvature that is the same as or similar to the rear edge of the wheel, And an engaging portion detachably coupled to an upper surface of the pedestal. The method according to claim 1,
A safety fence detachably coupled to the pedestal so as to close the right and left open portions of the wheel to prevent the pet from being separated from the pedestal, and a binding bar to bind the safety fence to the outside of the wheel,
Wherein hooks are formed at both ends of the binding bar, and a barhole is formed at the outer edge of the safety fence so that the hook is engaged with the hook.

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