KR100961734B1 - A Caster Capable of Mode-Conversion - Google Patents

Abstract

The present invention relates to a caster which is mounted and used in a transport cart, and in particular, a simple operation that can not only switch the mode to a rotation mode that can be freely rotated or a fixed mode that can be fixed in a straight direction, but also slightly reverses or advances. The mode can be easily switched only by making it possible not only to move sideways in a narrow space, but also to change direction while going straight, and to be able to be mounted on existing casters as well as to rotate freely. The present invention relates to a caster capable of changing modes so that the caster can be used in a constant mode at any time, regardless of movement, by allowing the fixed mode to be fixed in a rotation mode or a straight direction.

Caster, Mode Switching, Mode Lock

Description

Caster Capable of Mode-Conversion

The present invention relates to a caster which is mounted and used in a transport cart, and in particular, a simple operation that can not only switch the mode to a rotation mode that can be freely rotated or a fixed mode that can be fixed in a straight direction, but also slightly reverses or advances. The mode can be easily switched only by making it possible not only to move sideways in a narrow space, but also to change direction while going straight, and to be able to be mounted on existing casters as well as to rotate freely. The present invention relates to a caster capable of changing modes so that the caster can be used in a constant mode at any time, regardless of movement, by allowing the fixed mode to be fixed in a rotation mode or a straight direction.

Casters used in transport carts or baby carriages used in large shops or airports can be easily moved by pushing or pulling without heavy force even under heavy loads. Carrying carts usually have four wheels, and two or four of them are mounted in a caster shape. In this case, the following problems occur when using a conventional caster.

If only two of the four wheels used in the transport cart are casters, and the other two are fixedly mounted, the wheels located in the direction of rotation among the two fixed wheels will function as the rotating shaft when moving in a straight direction. It has the advantage of being able to easily resist inertia to go straight, thereby facilitating a change of direction with little force, but if you want to move sideways while stationary, friction between the two fixed wheels and the floor It is difficult to move sideways in the narrow space by the side or difficult to move to the exact position in the narrow space by this, there is a problem that requires a separate operation to reduce the friction, such as lifting the fixed wheels.

In addition, when all four wheels used for transport carts are mounted as casters, the mobility of the transport carts is very free in a narrow space, but there is no shaft that can resist the inertia to go straight when changing direction while going straight. Because of the need to create a resistance shaft with the user's manpower is a lot of force, in this case there is a problem that an accident due to unpredictable movement of the transport cart.

The present invention has been made to solve the above problems,

The object of the present invention is not only to switch the mode to the rotation mode that can be freely rotated or to the fixed mode that can be fixed in the straight direction, but also to make it easy to change the mode by a simple operation of slightly backward or forward It is to provide a caster capable of mode switching, which allows not only side movement in space but also straightness and easy direction change.

Another object of the present invention is to provide a caster capable of mode switching to be mounted on the existing casters so that the mode can be switched to the existing casters.

Still another object of the present invention is to allow the mode to be fixed in a rotation mode that can be freely rotated or a fixed mode that can be fixed in a straight direction in the caster capable of mode switching according to the present invention, regardless of movement as necessary. It is to provide a caster that can switch modes so that the caster can always be used in a constant mode.

The caster capable of mode switching for achieving the above object of the present invention includes the following configuration.

According to an embodiment of the present invention, the present invention provides a caster comprising a fixed base plate, a frame rotatably coupled to the base plate, and a wheel rotating in combination with the frame, the base plate coupled to the base plate. An upper fixing body fixed to the lower fixing body, a lower fixing body coupled to the frame at a lower portion of the upper fixing body and rotating together with the frame, a fixing pin movable through the lower fixing body, and one side of the fixing pin; Combination is possible by including a fixing pin moving means for moving the fixing pin by using the rotation of the wheel, it can be easily switched to the fixed mode of the fixed state or the rotation mode of the rotatable state do.

According to another embodiment of the present invention, in the mode switchable caster according to the present invention, the wheel includes an inner wheel which rotates together with the wheel by being coupled to or between the wheels, the inner wheel is recessed in the outer peripheral surface It includes, the fixing pin moving means includes an inner wheel coupling projection that can be caught in the groove of the inner wheel on the side in contact with the inner wheel, and a fixing pin coupling projection on the side in contact with the fixing pin, respectively, the fixing pin Is characterized in that it comprises a through hole that can be inserted into the fixing pin coupling projection at one end in contact with the fixing pin moving means.

According to another embodiment of the present invention, in the caster capable of mode switching according to the present invention, the fixing pin moving means further includes a restoring spring, and the restoring spring moves on one side of the frame and on the other side of the fixing pin. It is connected to each of the means, it characterized in that the fixed pin moving means can be easily restored to the original position again.

According to another embodiment of the present invention, in the caster mode switch according to the present invention, the inner wheel engaging projection includes a spring, when the groove of the inner wheel and the inner wheel engaging projection meets by the spring The inner wheel coupling protrusion is further protruded, characterized in that the rotational force of the inner wheel can be well received.

According to another embodiment of the present invention, in the mode switchable caster according to the present invention, the wheel includes an inner wheel which rotates together with the wheel by being coupled to or between the wheels, the inner wheel is projected on the outer peripheral surface It includes a projection, the fixing pin moving means is coupled to the fixing pin engaging portion on the side in contact with the fixing pin, the engaging projection engaging portion on the other side, the projection engaging portion engaging the hinge and catch the projection of the inner wheel Each of the protrusions can be included, wherein the fixing pin is characterized in that it comprises a through hole that can be inserted into the fixing pin coupling portion at one end in contact with the fixing pin moving means.

According to another embodiment of the present invention, in the caster capable of mode switching according to the present invention, the upper fixing body has a fixed position detecting rod extending from one end and a fixing pin coupling groove that can accommodate the fixing pin. It includes, the lower fixing body is formed through the fixing pin through hole to allow the fixing pin to move through, and the fixed pin through hole in the side in contact with the position detection bar, the ball through the ball to allow the ball to move Ball and the ball is moved in the through hole, characterized in that it comprises a ball for moving the fixing pin by using a force inserted by being pushed in the position detection bar.

According to another embodiment of the present invention, in the caster capable of mode switching according to the present invention, the fixing pin includes an elastic jaw on the side in contact with the ball, the elastic jaw protrudes when the fixing pin is moved to the The ball may be fixed to the inner surface of the through-hole and when the ball pushes the elastic jaw is characterized in that the elastic jaw is embedded and the fixing pin can move again.

According to another embodiment of the present invention, in the caster capable of mode switching according to the present invention, the fixing pin includes a protrusion on the other side of the side in contact with the ball, the lower fixing body in the fixing pin through hole Including the fixing pin spring located on the lower portion of the protrusion, when the ball pushes the elastic jaw and the elastic jaw is embedded, the fixing pin spring is to push the protrusion characterized in that the fixing pin can be easily moved do.

According to another embodiment of the present invention, in the caster capable of mode switching according to the present invention, the ball includes a locking projection protruding on one surface, and the lower fixing body has the locking projection on the inner surface of the ball through hole. Including a receiving jaw receiving groove, characterized in that the ball can move only a distance within the width of the locking jaw receiving groove when moving.

According to another embodiment of the present invention, the fixed pin moving means in the mode switchable caster according to the present invention includes a shaft moving means for moving the rotating shaft, the upper fixing body is formed at one end of the Including the insertion groove for inserting the position detection bar, it is characterized in that the mode can be fixed in the always fixed mode or rotation mode irrespective of the movement.

According to yet another embodiment of the present invention, the present invention provides a caster comprising a fixed base plate, a frame rotatably coupled to the base plate, and a wheel rotatably coupled to the frame, the base plate comprising: An upper fixing body coupled and fixed, a lower fixing body coupled to the frame at a lower portion of the upper fixing body and rotating together with the frame, a fixing pin movable through the lower fixing body, and one side of the fixing pin And a fixing pin moving means for moving the fixing pin by using the rotation of the wheel, wherein the fixing pin moving means is coupled to the side of the auxiliary wheel and the auxiliary wheel which rotates in contact with the wheel. And an auxiliary inner wheel that rotates with the auxiliary wheel and has protrusions formed on an outer circumferential surface thereof, and the fixing pin contacts the auxiliary inner wheel. Once the is characterized in that, to switch easily mode to the rotation mode of the fixing mode of the fixed or rotatable state by including a coupling protrusion that can be coupled projection of the sub-inner wheel.

The present invention can achieve the following effects by the configuration, combination, and use relationship described above with the present embodiment.

  The present invention can not only change the mode to the rotation mode that can be freely rotated or fixed mode that can be fixed in the straight direction, but also to easily switch the mode by a simple operation of moving backward or forward in a narrow space Not only does it move sideways, it also makes it easy to change direction while going straight.

The present invention is formed to be mounted on the existing casters to be able to be mounted on the existing casters to enable mode switching.

The present invention is to be able to fix the mode in a fixed mode that can be fixed in a rotation mode or a straight direction that can be freely rotated in the caster capable of mode switching according to the present invention always in a constant mode regardless of the movement as needed Make casters available.

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the caster capable of mode switching according to the present invention will be described in detail.

1 is a front view of a conventional caster, Figure 2 is a cross-sectional view of the caster capable of mode switching according to an embodiment of the present invention, Figure 3 is a caster capable of mode switching according to an embodiment of the present invention while the reverse mode 4 is a cross-sectional view of a state where the caster capable of mode switching according to an embodiment of the present invention is in a fixed mode while advancing.

1 and 2, the caster capable of mode switching according to an embodiment of the present invention includes a fixed base plate 1, a frame 2 rotatably coupled to the base plate 1, and A caster comprising a wheel (3) coupled to a frame (2) to rotate, wherein the upper fixture (4) is fixedly coupled to the base plate (1), and the lower portion of the upper fixture (4) A lower fixing body 5 coupled to the frame 2 and rotating together with the frame 2, a fixing pin 6 movable through the lower fixing body 5, and a fixing pin 6 of the lower fixing body 5. Combinable with one side and by including a fixing pin moving means 7 for moving the fixing pin 6 by using the rotation of the wheel (3), the fixed mode of the fixed state or the rotation mode of the rotatable state It is characterized in that the mode can be easily switched to,

In particular, the upper fixing body 4 includes a fixed position detecting rod 41 extending from one end and a fixing pin coupling groove 42 for accommodating the fixing pin 6, and the lower fixing body 5. ) Is formed by penetrating through the fixing pin through-hole 51 and the fixing pin through-hole 51 to the fixed pin through hole 51 to allow the fixing pin 6 to move through the ball ( 53) to move the fixing pin (6) by using a force inserted in the ball through hole 52 and the ball through hole 52 to be pushed and inserted into the position detecting rod (41). The ball 53 may comprise.

The base plate 1 is attached to and fixed to the bottom of a shopping cart or an industrial trolley, which serves as a central axis of the caster and is combined with a frame 2 to be described later.

The frame 2 is a portion that is rotatably coupled to the base plate 1 at the bottom of the base plate 1, so that the caster can be freely rotated in various directions because the frame 2 can be rotated at various angles. You can move to. The frame 2 also protects the wheel 3 described below and allows the wheel 3 to be fixed and rotated.

The wheel 3 is fixed to the frame 2 and rotates while friction with the ground, and can be freely rotated in either the forward (① direction) or the reverse (② direction) direction, and the wheel 3 is one To may be formed by attaching a plurality as needed.

According to another embodiment of the present invention, the wheel 3 may be coupled to the inner wheel 31 between or between the wheels 3, and the inner wheel 31 may be coupled to the wheel 3 together. It is preferable that the rotating member has a radius smaller than the radius of the wheel 3, and a groove 311 recessed in the shape of a tooth may be formed on the outer circumferential surface of the inner wheel 31. The inclined side may be formed to have a right triangle shape that is inclined in a rotational direction (① direction) advancing and then formed vertically in height. The inner wheel 31 is coupled to the fixing pin moving means 7 to be described later to operate the fixing pin moving means (7) will be described in detail for the operation principle.

The upper fixing body 4 may be formed in a rectangular parallelepiped shape as a part that is fixed to the base plate 1, and a portion of the upper plate 4 contacting the base plate 1 is a flange of the base plate 1. It is embedded by the height so that the mutual level can be matched when combined with the base plate (1), and also fixed pin coupling formed by being embedded upward from the bottom and the position detection bar 41 extending downward from one end It may include a groove 42.

The position detecting rod 41 is a rod or rod-shaped member extending downward from one end of the upper fixing body 4, the length of which should be extended to contact the ball 53 to be described later, As shown in the enlarged cross-sectional view of the A-A 'cross-section of the position detection bar 41 in 2, the surface of the position detection bar 41 is in contact with the ball 53, which will be described later, in particular. It is preferable that the ball 53 is formed in a round shape when the ball 53 inserted into the lower fixing body 5 rotates together with the lower fixing body 5 and comes to the correct position, that is, the position of the straight direction. In order to be inserted into the horizontal direction (㉮ direction) while being easily pushed and moved to the position detection bar 41 will be described in detail the principle of operation.

The fixing pin coupling groove 42 should be formed in a proper position and length so that the fixing pin 6 to be described later is inserted into the groove formed by being recessed upward from the bottom of the upper fixing body 4. Therefore, in the state in which the fixing pin 6 is inserted into the fixing pin coupling groove 42, the lower fixing body 5 cannot be rotated, so that the caster operates only in the fixed mode in a fixed state at a straight direction. Detailed description of the operation principle will be described later.

The lower fixing body 5 is coupled to the frame 2 to be rotated together when the frame 2 rotates, and is located below the upper fixing body 4, from top to bottom. Is formed to penetrate through the fixed pin through-hole 51 and the fixed pin through-hole (51) horizontally in the side contact with the fixed position detection bar 41 to allow the fixed pin (6) to move. The ball pin 53 to move horizontally in the ball through hole 52 and the ball through hole 52 to move horizontally in the fixed position bar (41) by using a force inserted into the fixing pin ( 6) may include a ball 53 to move up.

The fixing pin through hole 51 is a portion formed to penetrate from the upper surface of the lower fixing body 5 to the bottom so that the fixing pin 6 to be described later can move up and down through the fixing pin through hole 51. do. The inner surface of the fixing pin through-hole 51, in particular in contact with the upper surface of the lower fixing body 5 may be formed with a groove 511 is formed in a predetermined depth which is the elasticity of the fixing pin 6 to be described later This is to allow the jaw 62 to protrude and catch.

The ball through hole 52 is a part formed to penetrate the fixing pin through hole 51 horizontally from the side of the lower fixing body 5 in contact with the position detection bar 41, the ball 53 to be described later ) Can be moved horizontally through the ball through hole (52).

The ball 53 is a rod or rod-shaped member which moves horizontally in the ball through hole 52. When the caster is in a rotation mode, that is, the lower fixing body 5 is together with the frame 2. In the case of rotation, the ball 53 protrudes out of the side surface of the lower fixing body 5, and then when the caster is changed to the fixed mode, that is, when the lower fixing body 5 is positioned in the direction of going straight. The ball 53 is pushed by the position sensing rod 41 and is inserted into the ball 53 to move the fixing pin 6 in the fixing pin through hole 51 by using the inserted force. Detailed description of the operation principle will be described later.

According to another embodiment of the present invention, the ball 53 includes a locking jaw 531 protruding from one surface, and the lower fixing body 5 is the locking jaw (in the inner surface of the ball through hole 52) It may further include a locking jaw accommodation groove 55 that can accommodate the 531, the locking jaw accommodation groove 55 is formed in a predetermined width the locking jaw accommodated in the locking jaw accommodation groove (55). Since the ball 531 can only move within the locking jaw receiving groove 55, the ball 53 can move only a distance within a width of the locking jaw receiving groove 55, so that the ball 53 can be moved. It is possible to prevent the departure from the through-hole 52.

The fixing pin 6 is a rod-shaped rod-shaped member which moves through the lower fixing body 5 and moves up and down, and the moving distance of the fixing pin 6 moves upward of the upper fixing body 4. The fixing pin coupling groove 42 may be sufficiently inserted, and when the downward movement, the upper end of the fixing pin 6 is located below the bottom of the upper fixing body 4 so that the lower fixing body 5 is The fixing pin 6 should not be caught by the upper fixing body 4 when rotating. The fixing pin (6) is made of a material having a rigid enough to hold the lower fixing body (5) so as not to rotate by inserting into the fixing pin coupling groove (42), of the fixing pin (6) At the lower end, a through hole 61 may be formed so that the fixing pin coupling protrusion 72 of the fixing pin moving means 7 to be described later is inserted into the fixing hole. The fixing pin coupling projection 72 of 7) is inserted and coupled to move the fixing pin (6) downward and a detailed description of the operation principle will be described later.

According to another embodiment of the present invention, the fixing pin 6 may further include an elastic jaw 62 on the side in contact with the ball 53, the elastic jaw 62 is the fixing pin 6 Receiving an external pressure in the configuration of the projecting jaw shape having elasticity formed on one side of the) can be embedded into the fixing pin (6) and when the external pressure is lost can protrude to one side of the fixing pin (6), When the fixing pin 6 moves downward so that the elastic jaw 62 meets the ball through hole 52, the elastic jaw 62 protrudes and is caught by the upper surface of the ball through hole 52. When the fixing pin 6 is fixed and the ball 53 is pushed by the position detecting rod 41 to push the elastic jaw 62 as described below, the elastic jaw 62 is fixed. It is embedded in the pin 6 to allow the fixing pin 6 to move upwards and the elastic jaw 62 When the fixing pin when the through hole 51 takes the groove meet projected and 511 of the fixing pin (6) is fixed there is again a detailed description of its operation principle will be described later.

According to another embodiment of the present invention, the fixing pin 6 further includes a protrusion 63 on the other side of the side in contact with the ball 53, and the lower fixing body 5 has the fixing pin through hole. In the 51 may further include a fixing pin spring 54 which is located below the protrusion 63, the fixing pin 6 is moved downward by the elastic jaw (62). When the fixing pin spring 54 in the lower portion of the protrusion (63) is pressed in the compressed state (63) in a compressed state, the elastic jaw 62 of the fixing pin (6) described above As described above, when the ball is pushed by the 53 to be inserted into the fixing pin 6, the fixing pin spring 54 pushes the protrusion 63 so that the fixing pin 6 can be easily moved upward. It will help you, a detailed description of the operation principle will be described later.

The fixing pin moving means 7 is configured to move the fixing pin 6 using the rotation of the wheel 3 between the fixing pin 6 and the wheel 3, as described above. As in another embodiment of the present invention, when the wheel 3 includes the inner wheel 31, the fixing pin 6 may be moved using the rotation of the inner wheel 31. According to another embodiment of the present invention, the fixing pin moving means 7 is a disk-shaped rotating member as a whole, which is in contact with the inner wheel 31 on the outer circumferential surface of the groove 311 of the inner wheel 31. An inner wheel coupling protrusion 71 which may be caught, and a fixing pin coupling protrusion 72 may be included on the side in contact with the fixing pin 6, respectively.

The inner wheel coupling protrusion 71 may be caught in the groove 311 of the inner wheel 31 in a convex shape protruding to the side contacting the inner wheel 31 on the outer circumferential surface of the fixing pin moving means 7. When the inner wheel 31 is rotated in the forward direction (① direction) to the reverse direction (② direction), the inner wheel coupling protrusion 71 is caught by the groove 311 to move the fixing pin. The means 7 can also be rotated, which will be described in detail later.

According to another embodiment of the present invention, the inner wheel coupling protrusion 71 may include a spring 711 therein, and the inner wheel coupling protrusion 71 may have the inner wheel 31 due to the spring 711. When it meets the groove 311 of the) length is elongated can be precisely coupled with the groove 311, it is possible to efficiently receive the rotational force transmitted by the groove 311 of the inner wheel (31).

The fixing pin coupling protrusion 72 is coupled to the through hole 61 of the fixing pin 6 in a configuration of a protrusion projecting to a side in contact with the fixing pin 6 on the outer circumferential surface of the fixing pin moving unit 7. When the fixing pin moving means (7) is rotated is formed to the length that can be fixed to the fixing pin coupling protrusion 72 is coupled to the through hole 61 of the fixing pin (6) the fixing pin (6) It is possible to move downward, a detailed description of the operation principle will be described later.

According to another embodiment of the present invention, the fixing pin moving means 7 may further include a restoring spring 73. The restoring spring 73 is made of a material having elasticity and its overall shape is' d. It can be formed in a 'shape, one side is fixed while wrapping the protrusion 21 protruding inside the frame (3) and the other side is wrapped around the rotating shaft 79 of the fixing pin moving means (7) moving the fixing pin It is fixed to the projection 731 protruding from a predetermined portion of the means (7). The restoring spring 73 is a position where the inner wheel coupling projection 71 of the fixing pin moving means 7 is coupled to the groove 311 of the inner wheel 31 in a straight line (inner wheel coupling in Figure 2) The elastic force does not occur at the reference position with the protrusion 71 as the reference position), but the fixing pin moving means 7 rotates according to the rotation of the inner wheel 31, and thus the reference position. When out of the (when the inner wheel engaging projection 71 in the position indicated by the dotted line in Figure 2) the restoring spring 73 generates an elastic force so that the fixing pin moving means (7) to the reference position easily It will help you restore.

Hereinafter, with reference to Figures 3 and 4 will be described the operation principle of the state changeable caster according to an embodiment of the present invention is converted to the rotating mode while moving backward and the fixed mode while moving forward.

First, referring to FIG. 3, the operation principle of the state in which the caster capable of mode switching according to an embodiment of the present invention is switched to the rotating mode while reversing is described.

When the caster is reversed, the wheel 3 and the inner wheel 31 rotate in the reverse direction (② direction), that is, clockwise rotation, and accordingly the inner wheel coupling protrusion 71 of the fixing pin moving means 7 is rotated. It is caught in the groove 311 of the inner wheel 31 that rotates in the reverse direction (② direction), that is clockwise to move in a counterclockwise direction (ⓑ direction), so that the fixing pin moving means 7 is counterclockwise. (Ⓑ direction). When the fixing pin moving means 7 rotates in the counterclockwise direction (ⓑ direction), the fixing pin coupling protrusion 72 is also moved in the counterclockwise direction (ⓑ direction) and accordingly the fixing pin coupling protrusion 72 is provided. Is coupled to the through-hole 61 of the fixing pin 6 is to move the fixing pin 6 downward (㉡ direction). When the fixing pin 6 moves downward (하향 direction), the upper portion of the fixing pin 6 is separated from the fixing pin coupling groove 42 of the upper fixing body 4 and the upper portion of the fixing pin 6. Since the distal end is lower than the bottom of the upper fixing body 4, the fixing pin 6 is not caught by the upper fixing body 4 even when the lower fixing body 5 rotates together with the frame 2. The caster is able to move while rotating at various angles and the ball 53 is moved away from the position detecting rod 41 in the ball through hole 52 in the '㉯ direction' to the lower fixing body It protrudes in part from the side of (5).

Looking at the operation principle of the state in which the caster capable of mode switching according to an embodiment of the present invention is converted to the fixed mode again while advancing in a straight direction with reference to FIG. 4.

In order to move in the direction in which the casters go straight, the lower fixing body 5 should be positioned at the lower portion of the upper fixing body 4, and the lower fixing body 5 is positioned at the lower position of the upper fixing body 4. When the ball 53 is projected to the predetermined portion from the side of the lower fixing body 5 is caught on the position detecting rod 41 of the upper fixing body 4 to the position detecting rod 41. When the ball 53 pushes the fixing pin 6 in the ball through hole 52 by the pushing force, and the ball 53 pushes the fixing pin 6 accordingly, the fixing pin 6 moves upward (㉠ direction). The fixing pin 6 is inserted into the fixing pin coupling groove 42 of the upper fixing body 4. As the fixing pin 6 moves upward (㉠ direction) as well as the inner wheel 31 moves in a forward direction (① direction), that is, counterclockwise, the fixing pin moving means 7 moves clockwise. Rotation in the direction (ⓐ direction) is released between the fixing pin coupling projection 72 and the through hole 61 of the fixing pin (6).

Such a caster capable of mode switching according to an embodiment of the present invention can be easily switched between the fixed mode of the fixed state or the rotating mode of the rotatable state by simply reversing or going straight, such as a cart equipped with a caster. It can be easily pushed or rotated.

5 is a cross-sectional view of a caster capable of mode switching according to another embodiment of the present invention, FIG. 6 is a cross-sectional view of a caster capable of mode switching according to another embodiment of the present invention switched to a rotating mode while reversing. 7 is a cross-sectional view of the caster capable of mode switching according to another embodiment of the present invention in a fixed mode while advancing.

Referring to Figure 5, the caster capable of mode switching according to another embodiment of the present invention, in the caster capable of mode switching according to the present invention, the wheel 3 is coupled between the wheels 3 or to the wheel 3 The inner wheel 31 is rotated together with, the inner wheel 31 includes a projection 312 protruding on the outer circumferential surface, the fixing pin moving means 7 is in contact with the fixing pin (6) Hinge coupling to the fixing pin coupling portion 74 and the projection engaging portion coupling portion 75 and the projection locking portion coupling portion 75 on the side and the projections that can be caught on the protrusions 312 of the inner wheel 31. Comprising each of the locking portion 76, the fixing pin 6 includes a through hole 61 that can be inserted into the fixing pin coupling portion 74 at one end in contact with the fixed pin moving end (7). It is characterized by. Among the components of the caster capable of mode switching according to another embodiment of the present invention, the description of the same elements as those of the caster capable of mode switching according to an embodiment of the present invention will be omitted to avoid duplication. In the following, only the components having differences will be described intensively.

The inner wheel 31 is the same component as the inner wheel 31 described above, except that it includes a protrusion 312 protruding on the outer peripheral surface instead of including the recessed groove 311 described above. .

The protrusion 312 may be formed to have a right triangle shape that is inclined in a rotational direction (② direction) in which the hypotenuse is reversed and forms a height vertically after being protruded. The protrusion 312 may be fixed pin moving means described later. Combination with the projection (76) of the (7) is to operate the fixing pin moving means (7) will be described in detail for the operation principle.

The fixing pin moving means 7 is configured to move the fixing pin 6 downward by using the rotation of the inner wheel 31 between the fixing pin 6 and the inner wheel 31. The fixing pin moving means 7 according to another embodiment of the invention is a fixing pin coupling portion 74 and the projection engaging portion engaging portion 75 and the projection engaging portion coupled to the side contacting the fixing pin 6 Hinge coupled to the portion 75 may include a projection engaging portion 76 that can be caught on the projection 312 of the inner wheel 31, respectively.

Looking at the fixing pin coupling portion 74 and the projection engaging portion coupling portion 75, the fixing pin coupling portion 74 is a through hole of the fixing pin 6 to be described later in contact with the fixing pin (6) It may be formed in a rod or rod shape that can be inserted into the 61 and the protrusion engaging portion 75 may also be formed in a rod or rod shape at the other end symmetrical with the fixing pin coupling portion 74 The fixing pin coupling portion 74 and the projection engaging portion coupling portion 75 has a seesaw movement around the rotation shaft 79. A detailed description of the operation principle will be described later.

The projection engaging portion 76 is a rod or rod shape as a whole, one end is hinged to the projection engaging portion coupling portion 75 and the other end groove (761) to be caught in the projection 312 of the inner wheel (31) When the inner wheel 31 rotates in the reverse direction, the protrusion 312 of the inner wheel 31 is caught in the groove 761 so as to move the protrusion catching portion 76 upward. Detailed description of the operation principle will be described later. At this time, the end of the projection engaging portion 76, that is, the lower portion 762 of the groove 761 is preferably formed to protrude, this portion is projected by the contact with the inner wheel 31 is the projection engaging portion This is because the groove 761 of the 76 may be prevented from excessively upward when caught by the protrusion 312 of the inner wheel 31.

The fixing pin (6) is the same component as the fixing pin (6) described above, the through-hole 61 through which the fixing pin coupling portion 74 can be inserted into one end contacting the fixing pin moving means (7) Also, the same components as the through-holes 61 described above will be omitted.

Hereinafter, with reference to Figures 6 and 7, the caster capable of mode switching according to another embodiment of the present invention will be described the operation principle of the state is converted to the rotating mode while moving forward and the fixed mode while moving forward.

First, referring to FIG. 6, the operation principle of the state in which the caster capable of mode switching according to another embodiment of the present invention is switched to the rotating mode while reversing is described.

When the caster moves backward, the wheel 3 and the inner wheel 31 rotate in the reverse direction (② direction), that is, in a clockwise direction, so that the protrusion 312 of the inner wheel 31 moves the fixing pin. (7) is caught in the groove (761) of the projection engaging portion 76 to move the projection engaging portion 76 upward (ⓓ direction) and the projection engaging portion combined with the projection engaging portion 76 hinged The unit 75 is also moved upward (ⓓ direction). When the protrusion engaging portion 75 is moved upward (ⓓ direction), the fixing pin coupling portion 74 is moved downward (㉡ direction) by the seesaw movement and accordingly the fixing pin coupling portion 74 ) Is coupled to the through hole 61 of the fixing pin 6 to move the fixing pin 6 downward (㉡ direction). When the fixing pin 6 moves downward (하향 direction), the upper portion of the fixing pin 6 is separated from the fixing pin coupling groove 42 of the upper fixing body 4 and the upper portion of the fixing pin 6. Since the distal end is lower than the bottom of the upper fixing body 4, the fixing pin 6 is not caught by the upper fixing body 4 even when the lower fixing body 5 rotates together with the frame 2. The caster is able to move while rotating at various angles and the ball 53 is moved away from the position detecting rod 41 in the ball through hole 52 in the '㉯ direction' to the lower fixing body It protrudes in part from the side of (5).

Looking at the operation principle of the state in which the caster capable of mode switching according to another embodiment of the present invention is converted to the fixed mode again while advancing in a straight direction with reference to FIG. 7.

In order to move in the direction in which the casters go straight, the lower fixing body 5 should be positioned at the lower portion of the upper fixing body 4, and the lower fixing body 5 is positioned at the lower position of the upper fixing body 4. When the ball 53 is projected to the predetermined portion from the side of the lower fixing body 5 is caught on the position detecting rod 41 of the upper fixing body 4 to the position detecting rod 41. When the ball 53 pushes the fixing pin 6 in the ball through hole 52 by the pushing force, and the ball 53 pushes the fixing pin 6 accordingly, the fixing pin 6 moves upward (㉠ direction). The fixing pin 6 is inserted into the fixing pin coupling groove 42 of the upper fixing body 4. As the fixing pin 6 moves upward (㉠ direction), the fixing pin coupling portion 74 of the fixing pin moving unit 7 coupled to the through hole 61 of the fixing pin 6 is also upward ( 돌 direction) and the projection engaging portion 75 is moved downward (© direction) by the seesaw movement and thus the projection engaging portion 76 hinged to the projection engaging portion 75 ) Will also move downward (© direction).

8 is a cross-sectional view of a caster capable of mode switching according to still another embodiment of the present invention, and FIG. 9 is a cross-sectional view of a caster capable of mode switching according to another embodiment of the present invention switched to a rotating mode while reversing. 10 is a cross-sectional view of a caster capable of switching modes according to still another embodiment of the present invention in a fixed mode while advancing.

Referring to FIG. 8, the caster capable of switching modes according to another embodiment of the present invention includes a frame 2 and a frame 2 rotatably coupled to the fixed base plate 1 and the base plate 1. In the caster comprising a wheel (3) to rotate in combination with the upper, the upper fixture (4) coupled to the base plate (1) and the lower frame of the upper fixture (4) is coupled to the frame (2) And the fixed pin 6 and the fixed pin 6 which are movable through the lower fixture 5 and the lower fixture 5 which rotates together with the frame 2 and are coupled to one side of the wheel ( And a fixing pin moving means (7) for moving the fixing pin (6) by using the rotation of the fixing pin (7), wherein the fixing pin moving means (7) rotates in contact with the wheel (3). And, coupled to the side of the auxiliary wheel 77 rotates with the auxiliary wheel 77 and the projection on the outer peripheral surface (781) The auxiliary inner wheel 78 is formed, and the fixing pin 6 is a protrusion coupling portion capable of engaging with the projection 781 of the auxiliary inner wheel 78 at one end that is in contact with the auxiliary inner wheel 78 ( And 64). Among the components of the caster capable of mode switching according to another embodiment of the present invention, the same description as the components of the caster capable of mode switching according to the embodiment of the present invention is omitted to avoid duplication. In the following, only the components having differences will be described intensively.

The fixing pin moving means 7 is configured to move the fixing pin 6 downward by using the rotation of the wheel 3 between the fixing pin 6 and the wheel 3 of the present invention. The fixing pin moving means 7 according to another embodiment is coupled to the side of the auxiliary wheel 77 and the auxiliary wheel 77 rotates in contact with the wheel 3 and the auxiliary wheel 77 and It may be formed to include a secondary inner wheel 78 is rotated together and the projection 781 is formed on the outer peripheral surface.

The auxiliary wheel 77 may be formed in a circular shape to rotate in contact with the wheel (3), because the wheel 3 rotates in contact with the wheel (3) when the wheel 3 rotates in the clockwise direction The auxiliary wheel 77 is rotated in a counterclockwise direction, which will be described in detail later.

The auxiliary inner wheel 78 may be formed in a circular shape so as to be coupled to the side of the auxiliary wheel 77 to rotate together with the auxiliary wheel 77, by using a rotating force of the fixed pin ( 6) to move downward, on the outer circumferential surface of the inner auxiliary wheel 78 may be formed a projection 781 that can be combined with the projection engaging portion 64 of the fixing pin 6 to be described later, The protrusion 781 of the inner auxiliary wheel 78 may be formed to protrude in a right triangle shape in which the hypotenuse is tapered upward in a counterclockwise direction to form a vertical height, and the protrusion coupling part of the fixing pin 6 to be described later ( 64) to move the fixing pin (6) downward in combination with the detailed description of the operation principle will be described later.

The fixing pin 6 is the same component as the fixing pin 6 described above, but is coupled to the through hole 61 and the protrusion of the auxiliary inner wheel 78 at one end contacting the auxiliary inner wheel 78. It may further include a protrusion coupling portion 64 that can be combined with the (781).

The protrusion coupling portion 64 is a portion that is coupled to the through hole 61, the overall shape may be formed in the 'L' shape as shown in Figure 8, the upper portion is inserted into the through hole 61 The end portion may be bent once more to prevent it from being separated from the through hole 61, and the lower portion is a portion that engages with the protrusion 781 of the auxiliary inner wheel 78 and the auxiliary inner wheel ( When 78) rotates in the counterclockwise direction is moved downward by the rotation will be described in detail for the operation principle. At this time, the protruding stop portion 641 of the protrusion coupling portion 64 is in contact with the auxiliary inner wheel 78 so that the auxiliary inner wheel 78 rotates in a counterclockwise direction of the auxiliary inner wheel 78 When the protrusion 781 is coupled to the lower end of the protrusion coupling part 64, the protrusion 781 may be prevented from being excessively downward when the protrusion coupling part 64 moves downward.

Hereinafter, with reference to Figures 9 and 10 will be described the operation principle of the state changeable caster according to another embodiment of the present invention is converted to the rotating mode while moving backward and the fixed mode while moving forward.

First, referring to FIG. 9, the operation principle of the state in which the caster capable of mode switching according to another embodiment of the present invention is switched to the rotating mode while reversing is described.

When the caster is retracted, the wheel 3 rotates in the reverse direction (② direction), that is, clockwise. Accordingly, the auxiliary wheel 77 of the fixed pin moving means 7 moves in the counterclockwise direction (ⓑ direction). The auxiliary inner wheel 78 is also rotated counterclockwise (ⓑ direction). When the auxiliary inner wheel 78 of the fixing pin moving means 7 rotates in the counterclockwise direction (ⓑ direction), the protrusion 781 of the auxiliary inner wheel 78 also rotates in the counterclockwise direction (ⓑ direction). As a result, the protrusion coupling part 64 of the fixing pin 6 is coupled to the protrusion 781 of the auxiliary inner wheel 78 to move the fixing pin 6 downward () direction). When the fixing pin 6 moves downward (하향 direction), the upper portion of the fixing pin 6 is separated from the fixing pin coupling groove 42 of the upper fixing body 4 and the upper portion of the fixing pin 6. Since the distal end is lower than the bottom of the upper fixing body 4, the fixing pin 6 is not caught by the upper fixing body 4 even when the lower fixing body 5 rotates together with the frame 2. The caster is able to move while rotating at various angles and the ball 53 is moved away from the position detection bar 41 in the ball through hole 52 in the '㉯ direction' to the lower height Protrudes from the side of the stagnation (5) a portion.

Looking at the operation principle of the state in which the caster capable of mode switching according to another embodiment of the present invention is converted to the fixed mode again while advancing in a straight direction with reference to FIG. 10.

In order to move in the direction in which the casters go straight, the lower fixing body 5 should be positioned at the lower portion of the upper fixing body 4, and the lower fixing body 5 is positioned at the lower position of the upper fixing body 4. When the ball 53 is projected to the predetermined portion from the side of the lower fixing body 5 is caught on the position detecting rod 41 of the upper fixing body 4 to the position detecting rod 41. When the ball 53 pushes the fixing pin 6 in the ball through hole 52 by the pushing force, and the ball 53 pushes the fixing pin 6 accordingly, the fixing pin 6 moves upward (㉠ direction). The fixing pin 6 is inserted into the fixing pin coupling groove 42 of the upper fixing body 4. As the fixing pin 6 moves upward (㉠ direction) as well as the inner wheel 31 moves in a forward direction (① direction), that is, counterclockwise, the fixing pin moving means 7 moves clockwise. It will rotate in the (ⓐ direction).

Such a caster capable of mode switching according to another embodiment of the present invention, in particular, can be formed integrally by separately separating the other components except for the base plate 1, the frame 2, and the wheel 3. Therefore, when it is mounted on an existing caster having only the base plate 1, the frame 2 and the wheel 3, the existing caster has a feature that can be converted into a caster capable of mode switching.

11 and 12 are cross-sectional views of the caster capable of mode switching according to another embodiment of the present invention, and FIG. 13 is a front view of the caster capable of mode switching according to another embodiment of the present invention.

11 to 13, the caster capable of mode switching according to another embodiment of the present invention, the fixed pin moving means (7) includes a shaft moving means (791) for moving the rotary shaft (79) The upper fixing body 4 includes an insertion groove 43 into which the fixed position detecting rod 41 extending from one end thereof can be inserted, thereby fixing the mode in the fixed mode or the rotation mode regardless of the movement. Characterized in that it can.

As shown in FIG. 11, the upper fixing body 4 may include an insertion groove 43, and the insertion groove 43 is a groove formed on an upper portion of the position detection bar 41. The sensing rod 41 has a width and depth enough to be inserted into the bottom of the position detecting rod 41 when the position detecting rod 41 is inserted upward into the insertion groove 43. Since the end is in the position higher than the ball 53, the caster according to the present invention in the rotation mode state, that is, the caster in the straight mode in the state that the ball 53 protrudes from the side of the lower fixture 5 That is, even if the lower fixing body 5 is in the correct position to go straight, the protruding ball 53 is not caught in the position detecting rod 41, so it cannot move in the horizontal direction, the fixing pin 6 ) So that the fixing pin 6 is upward Since it is impossible to move, it is possible to continuously maintain the rotation mode in which the lower fixing body 5 and the frame 2 can freely rotate.

12 and 13, the fixing pin moving means 7 may include a shaft moving means 791 that can move the rotary shaft 79. The shaft moving means 791 is the Means a channel formed in the frame (2) to move the rotating shaft (79) extending in the state in which the rotating shaft (79) extends through the frame (2), as shown in FIG. As described above, the width of the straight path 7711 in which the rotating shaft 79 is moved may be formed in a dumbbell shape smaller than the diameter of the circular hole on both sides of the straight path 7711 in which the rotating shaft 79 is located. As shown in FIG. 12, in the state in which the rotating shaft 79 is moved upward through the shaft moving unit 791, the inner wheel coupling protrusion 71 of the fixing pin moving unit 7 is the inner wheel 31. Since the inner wheel 31 is rotated in the backward direction because it cannot be caught in the groove 311 of the), the fixing pin moving means 7 does not operate and thus the fixing pin 6 continues to the upper portion. The fixed pin coupling groove 42 of the fixing body 4 is maintained in a state in which the lower fixing body 5 and the frame 2 can be freely rotated in a fixed mode.

Such a caster capable of mode switching according to another embodiment of the present invention has a feature of fixing a mode in a fixed mode or a rotating mode when it is necessary to continuously fix or rotate the caster as needed.

In the above, the Applicant has described preferred embodiments of the present invention, but these embodiments are merely one embodiment for implementing the technical idea of the present invention, and any changes or modifications may be made as long as the technical idea of the present invention is implemented. Should be interpreted as being within the scope.

1 is a front view of a conventional caster

Figure 2 is a cross-sectional view of the caster capable of mode switching according to an embodiment of the present invention

3 is a cross-sectional view of the caster capable of mode switching according to an embodiment of the present invention is switched to the rotating mode while reversing;

Figure 4 is a cross-sectional view of the state changeable caster according to an embodiment of the present invention in a fixed mode while moving forward

5 is a cross-sectional view of the caster capable of mode switching according to another embodiment of the present invention.

6 is a cross-sectional view of the caster capable of mode switching according to another embodiment of the present invention switched to the rotating mode while reversing;

Figure 7 is a cross-sectional view of the caster capable of mode switching according to another embodiment of the present invention in a fixed mode while advancing

8 is a cross-sectional view of the caster capable of mode switching according to another embodiment of the present invention.

9 is a cross-sectional view of the caster capable of mode switching according to still another embodiment of the present invention is switched to the rotating mode while reversing;

10 is a cross-sectional view of a caster capable of mode switching according to another embodiment of the present invention in a fixed mode while advancing

11 and 12 are cross-sectional views of the caster capable of mode switching according to another embodiment of the present invention.

13 is a front view of the caster capable of mode switching according to another embodiment of the present invention.

* Explanation of the main symbols used in the drawings

1: Base plate 2: Frame 3: Wheel 4: Upper fixture

5: lower fixing body 6: fixing pin 7: fixing pin moving means

21: projection 31: inner wheel 311: groove 312: projection

41: position detection bar 42: fixed pin coupling groove 43: insertion groove

51: fixed pin through hole 511: groove 52: ball through hole 53: ball

531: locking jaw 54: fixing pin spring 55: locking jaw accommodation groove

61: through hole 62: elastic jaw 63: protrusion 64: protrusion coupling portion

71: inner wheel engaging projection 711: spring

72: fixing pin coupling protrusion 73: restoring spring 731: protrusion

74: fixing pin coupling portion 75: protrusion engaging portion coupling portion

76: projection part 761: home

77: auxiliary wheel 78: auxiliary inner wheel 781: projection

79: rotation axis 791: side movement means 7911: straight path

Claims (16)

In the caster comprising a frame rotatably coupled to a fixed base plate, and a wheel that rotates in combination with the frame, An upper fixture fixed to the base plate and fixed to the frame, a lower fixture coupled to the frame at a lower portion of the upper fixture, and rotated together with the frame; Or a fixing pin to which the binding is released, and a fixing pin moving unit which is coupled to one side of the fixing pin and moves the fixing pin by using the rotation of the wheel. Caster capable of mode switching, characterized in that the mode can be easily switched to a fixed mode in a fixed state or a rotation mode in a rotatable state. The method of claim 1, The wheel includes an inner wheel that rotates with the wheel in combination with or between the wheels, The inner wheel includes a groove embedded in the outer peripheral surface, The fixing pin moving means includes an inner wheel coupling protrusion that can be caught in the groove of the inner wheel on the side in contact with the inner wheel, and a fixing pin coupling protrusion on the side in contact with the fixing pin, respectively. The fixing pin is a mode switchable caster, characterized in that it comprises a through-hole through which the fixing pin coupling projection is inserted into one end in contact with the fixing pin moving means. The method of claim 2, wherein the fixing pin moving means further comprises a restoring spring, wherein the restoring spring is connected to the frame and the other side of the fixing pin moving means, respectively, when the fixing pin moving means is rotated. Castable mode switch, characterized in that can be easily restored to the original position again. According to claim 2, wherein the inner wheel engaging projection includes a spring, when the groove of the inner wheel and the inner wheel engaging projection meets the inner wheel engaging projection by the spring further protrudes the rotational force of the inner wheel Caster capable of mode switching, characterized in that it can be delivered well. The method of claim 1, The wheel includes an inner wheel that rotates with the wheel in combination with or between the wheels, The inner wheel includes a protrusion protruding from the outer circumferential surface, The fixing pin moving means is coupled to the fixing pin on the side in contact with the fixing pin, the projection engaging portion engaging portion on the other side, the projection engaging portion hinged to the engaging portion engaging portion engaging projection that can be caught on the projection of the inner wheel Including each, The fixing pin is a mode switchable caster, characterized in that it comprises a through-hole through which the fixing pin coupling portion can be inserted into one end in contact with the fixing pin moving means. The method according to any one of claims 1 to 5, The upper fixture includes a fixed position detection rod extending from one end, and a fixing pin coupling groove that can accommodate the fixing pin, The lower fixing body has a fixed pin through hole to allow the fixing pin to move through, and a ball through hole formed to penetrate through the fixing pin through hole at a side in contact with the position detecting rod to allow the ball to move, and The ball can be moved within the hole through the caster mode changeable, characterized in that it comprises a ball for moving the fixing pin by using the force pushed in the position sensing rod. The method of claim 6, The fixing pin includes an elastic jaw on the side where the ball is in contact with, the elastic jaw is protruded when the fixing pin is moved can be fixed to the inner surface of the ball through hole and the ball is pushed the elastic jaw is elastic Caster can be switched mode characterized in that the jaw is recessed to move the fixing pin again. The method of claim 7, wherein the fixing pin comprises a protrusion on the other side of the side in contact with the ball, the lower fixing body includes a fixing pin spring positioned on the lower portion of the protrusion in the fixing pin through hole, When the ball pushes the elastic jaw so that the elastic jaw is embedded, the fixed pin spring is pushed the projection, characterized in that the fixed pin can be easily moved caster. The method of claim 6, The ball includes a locking jaw protruding from one surface, and the lower fixing body includes a locking jaw accommodation groove for receiving the locking jaw on the inner surface of the ball through hole, the width of the locking jaw accommodation groove when the ball is moved Caster capable of mode switching, characterized in that it can move only within the distance. The method of claim 6, The fixing pin moving means includes an axis moving means for moving the rotating shaft, and the upper fixing body includes an insertion groove for inserting the position detecting rod extending from one end, always fixed regardless of the movement Caster capable of mode switching, characterized in that the mode can be fixed in the mode or rotation mode. In the caster comprising a frame rotatably coupled to a fixed base plate, and a wheel that rotates in combination with the frame, An upper fixture fixed to the base plate and fixed to the frame, a lower fixture coupled to the frame at a lower portion of the upper fixture, and rotated together with the frame; Or a fixing pin to which the binding is released, and a fixing pin moving unit which can be combined with one side of the fixing pin and moves the fixing pin using the rotation of the wheel, The fixing pin moving means includes an auxiliary wheel that rotates in contact with the wheel, and an auxiliary inner wheel which is coupled to the side of the auxiliary wheel to rotate together with the auxiliary wheel and has protrusions formed on an outer circumferential surface thereof. The fixing pin includes a protrusion coupling part that can be coupled to the protrusion of the auxiliary inner wheel at one end in contact with the auxiliary inner wheel, Caster capable of mode switching, characterized in that the mode can be easily switched to a fixed mode in a fixed state or a rotation mode in a rotatable state. The method of claim 11, The upper fixture includes a fixed position detection rod extending from one end, and a fixing pin coupling groove that can accommodate the fixing pin, The lower fixing body has a fixed pin through hole to allow the fixing pin to move through, and a ball through hole formed to penetrate through the fixing pin through hole at a side in contact with the position detecting rod to allow the ball to move, and The ball can be moved within the hole through the caster mode changeable, characterized in that it comprises a ball for moving the fixing pin by using the force pushed in the position sensing rod. 13. The method of claim 12, The fixing pin includes an elastic jaw on the side where the ball is in contact with, the elastic jaw is protruded when the fixing pin is moved can be fixed to the inner surface of the ball through hole and the ball is pushed the elastic jaw is elastic Caster can be switched mode characterized in that the jaw is recessed to move the fixing pin again. 15. The method of claim 13, wherein the fixing pin has a projection on the other side of the side in contact with the ball, the lower fixing body includes a fixing pin spring located below the projection in the fixing pin through hole, When the ball pushes the elastic jaw so that the elastic jaw is embedded, the fixed pin spring is pushed the protrusion, characterized in that the fixed pin can be easily moved caster. 13. The method of claim 12, The ball includes a locking jaw protruding from one surface, and the lower fixing body includes a locking jaw accommodation groove for receiving the locking jaw on the inner surface of the ball through hole, the width of the locking jaw accommodation groove when the ball is moved Caster capable of mode switching, characterized in that it can move only within the distance. 13. The method of claim 12, The fixing pin moving means includes an axis moving means for moving the rotating shaft, and the upper fixing body includes an insertion groove for inserting the position detecting rod extending from one end, regardless of movement Caster capable of mode switching, characterized in that the mode can be fixed in the fixed mode or rotation mode.

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