JPH04961Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a caster with a brake.

(Prior Art) Conventionally, as a caster with a brake of this type, a structure described in, for example, Japanese Utility Model Publication No. 16725/1983 is known. The structure described in this publication is
A rotary frame body having wheels is attached to a fixed part with a rotary brake piece protruding from the lower end so as to be rotatable about a vertical axis, and one end of the brake piece is fixed to the rotary frame body. is positioned above the wheel, and a brake shaft of the petal is rotatably supported horizontally in different mounting holes on the left and right sides of the rotation frame, and the brake shaft is locked to the rotation stopper piece of the fixed part. This structure includes a projection that presses the brake lever and a bolt-shaped brake lever that presses the brake piece toward the wheel so that it can move forward and backward.

(Problem to be solved by the invention) In the above conventional structure, the brake shaft of the petal is supported horizontally in different mounting holes on the left and right sides of the rotating frame, and the brake shaft has a protrusion larger than the mounting hole and a braking shaft. Because of the structure in which the lever is protruded, it is not possible to pull out the brake shaft of this petal from the rotating frame body and set it on the rotating frame body by swapping the left and right sides to make it easier to operate the pedal. Since the brake shaft must be mounted after horizontally suspending the brake shaft in the left and right mounting holes, there is a problem in that the mounting is time-consuming.

Therefore, the present invention has been developed in view of the above points, and aims to always lock the rotation of the wheels and the rotation of the legs with the wheels at the same time using a simple structure. Another object of the present invention is to provide a caster in which the mounting position of the foot lever can be easily changed and set in the left-right direction.

(Means for Solving the Problems) The caster of the present invention has a circular mounting hole in the center that penetrates in the vertical direction, and a fixing base plate that has a locking groove on the lower surface of the opening periphery of the mounting hole. , a top plate that is rotatably attached to the mounting hole of the fixed base plate via a ball about a vertical axis and has a communication hole that penetrates in the vertical direction and communicates with the locking groove of the fixed base plate; A leg body consisting of left and right leg pieces each facing downward from both sides of the top plate and forming circular holes of the same shape facing each other, and a leg body rotatably supported at the lower end of both leg pieces of the leg body. a wheel, and a stopper pin located above the wheel, having one end fixed to the leg, the other end being inserted into the communication hole so as to be vertically movable, and engaging and disengaging from the locking groove. a first elastic plate that is integrally erected; and a lock that is located between the first elastic plate and the upper part of the wheel, has one end fixed to the leg body, and a lock formed on the other end. A second elastic plate whose portion faces the wheel, and a second elastic plate inserted between the first and second elastic plates to be inserted into and removed from the circular holes of the left and right leg pieces, and horizontally suspended so as to be freely rotatable. The insertion shaft has a pushing part for pushing and locking the stopper pin of the first elastic plate in the locking groove, and a second elastic member at the pushing and locking position of the pushing part. a pushing part located at a position that pushes the locking part of the plate into contact with the wheel; a flat release part that releases the stopper pin from the locking groove; and a flat release part that locks the wheel at the release position. a flat release part located on at least one of the first and second elastic plates;
and a rotation stopper for locking the flat release portion of the insertion shaft portion of the foot lever that has pushed the second elastic plate.

(Function) In the caster of the present invention, when the foot lever is rotated, the insertion shaft portion of the foot lever, which is pivoted on the leg body, is supported by the opposing circular hole and rotated.
A pushing part that pushes the first elastic plate of this insertion shaft part and a pushing part that pushes the second elastic plate are used to
and the second elastic plate in the vertical direction,
The stopper pin of the first elastic plate is guided by the communication hole and pushed up, and its upper end is pushed and locked in the locking groove of the fixed base plate, and at the same time, the locking part of the second elastic plate is It is pushed into contact with the outer side of the wheel. In addition, the pushing part that pushed the first elastic plate of the insertion shaft of the foot lever and the pushing part that pushed the second elastic plate are operated by the upper and lower first and second elastic plates. While being held elastically, the flattened release portion is locked by a stopper to prevent the insertion shaft from rotating. Therefore, the rotation of the wheel is locked, and the rotation of the leg with the wheel about the vertical axis is locked relative to the fixed base plate, and its pivoting and traveling rotations are stopped.

Also, when the foot lever is rotated in the return direction, the insertion shaft is supported by the corresponding circular hole and rotated, and the pushing part that pushed the first elastic plate of the insertion shaft and the second The pushing portions that pushed the elastic plates are rotated, and these pushing portions are removed from the positions where they pushed the first and second elastic plates, and the first elastic plate is moved to the flat release portion that releases the stopper pin. At the same time as the elastic plate is engaged, the second elastic plate is engaged with the flat release part that releases the engagement part of the locking part from the wheel, and the stopper pin of the first elastic plate is removed from the locking groove and at the same time 2
The locking part of the elastic plate comes off from the outer side of the wheel. Therefore, the wheels and legs are unlocked.

(Example) Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.

In the figure, reference numeral 1 denotes a fixed base plate formed in a rectangular shape. A circular mounting hole 2 penetrating vertically is formed in the center of the fixed base plate 1, and a large number of holes are formed on the lower surface of the opening periphery of this mounting hole 2. A locking groove 3 is formed radially and annularly, and an annular recess 4 is formed on the outer periphery of the locking groove 3.
An annular locking portion 5 is formed on the upper surface of the opening periphery.

In addition, a movable plate 6 is installed in the mounting hole 2 of the fixed base plate 1.
is rotatably inserted, and a large number of balls 8 are rotatably interposed between the annular recess 7 formed on the lower outer surface of the movable plate 6 and the annular locking portion 5 of the fixed base plate 1, The movable plate 6 is supported by the large number of balls 8 on the fixed base plate 1 so as to be rotatable about a vertical axis. Further, a leg body 11 is fixed to the horizontal bottom plate portion 9 of the movable plate 6 via a rotating plate 10. This leg body 11 is provided in parallel with a top plate 12 which is superimposed on the rotating plate 10 and fixed together with the bottom plate part 9 by a connector 13, and extends downwardly from both sides of the top plate 12. It is composed of left and right leg pieces 16.

The rotating plate 10 has an annular locking recess 14 bent upward on its outer periphery, and a large number of balls 15 are arranged between the locking recess 14 and the annular recess 4 of the fixed base plate 1. A rotatable plate 10 is rotatably attached to the multiple balls 15 so as to be rotatable about a vertical axis.

Further, a wheel 18 is rotatably supported between the lower ends of the opposing left and right leg pieces 16 of the leg body 11 via a wheel 17, and the top plate 12 of the leg body 11 and the rotating plate 10 are positioned eccentrically. A communication hole 19 that penetrates in the vertical direction and communicates with the locking groove 3 of the fixed base plate 1 is formed in the fixing base plate 1 .

Furthermore, mounting plates 20 and 21 are formed on both sides of the top plate 12 between the left and right leg pieces 16 of the leg body 11, respectively. And one mounting plate 2
0, one end of a first elastic plate 22 made of a spring plate disposed above the wheel 18 is fixed integrally with a locking tool 23, and this first elastic plate 22 , is substantially parallel to the top plate 12 and protrudes toward the other mounting plate 21 , and a stopper pin 24 is integrally erected at the protruding end. The stopper pin 24 is inserted through the stopper pin 24 so as to be movable therethrough, and the upper end portion 25 of the stopper pin 24 is detachably locked in the locking groove 3 at the selected position. Further, a stopper 26 is formed by cutting downward on the first elastic plate 22 in the vicinity of the stopper pin 24.

Further, on the other mounting plate 21, a second elastic plate 27 made of a spring plate is disposed between the first elastic plate 22 and the upper part of the wheel 18.
One end portion is fixed together with a locking tool 28, and this second elastic plate 27 faces the first elastic plate 22 at the lower side of the first elastic plate 22 and is attached to the first elastic plate 22. protrudes substantially horizontally toward the plate 20,
A locking portion 29 facing the outer periphery of the wheel 18 is wound around this protruding end.

Furthermore, the opposing left and right leg pieces 1 of the leg body 11
A circular hole 30 of the same shape is bored in the upper part of 6, and
Both ends of the insertion shaft portion 32 of the foot lever 31 inserted between the first and second elastic plates 22 and 27 are horizontally suspended in the opposing circular hole 30 so as to be freely insertable and removable and rotatable. ing. This foot lever 31 is approximately L.
The insertion shaft portion 32 has a pushing portion 34 formed at least in the middle portion of the insertion shaft portion 32 for pushing and locking the stopper pin 24 in the locking groove 3;
The pushing portion 34 is in a position where the locking portion 29 of the second elastic plate 27 is pushed into contact with the wheel 18 at the push locking position of No. 4, and the stopper pin 24 is locked in the locking groove 3. A flat shaft part 33 as a flat release part that releases the flat shaft part 33, and a flat shaft part 33 as a flat release part that releases the contact of the locking part 29 from the wheel 18 at the released position of the flat shaft part 33 are formed, respectively. ing. The insertion shaft portion 32 having each of the pushing portions 34 and each of the flat shaft portions 33 is
It is formed in a size that allows it to be inserted into and removed from the opposing circular holes 30. Further, a flange 35 for preventing removal having a diameter larger than the circular hole 30 is integrally formed near the bent portion of the insertion shaft 32, and a flange 35 having a diameter larger than the circular hole 30 is provided at the tip of the insertion shaft 32. A pin 38 is removably inserted into the through hole 37 via a stopper 36 for preventing the lever from coming off, and a foot plate 39 is formed on the foot lever 31.

In the structure configured in this way, the fixing base plate 1 is brought into contact with the lower surface of the mounting member 40, and by fixing them together with a plurality of bolts 41,
A caster 42 is fixed to the mounting member 40. At this time, as shown in FIG.
The upper and lower first and second elastic plates 22 and 27 are respectively supported in a state of elastic contact from the vertical direction, and therefore the foot plate 39 of the foot lever 31 is supported as shown in FIG. As shown in FIG.
is designed to be able to move freely and turn freely.

Next, when the foot plate 39 of the foot lever 31 is depressed downward, the insertion shaft part 32 is supported by the opposing circular hole 30 and rotated by the foot plate 39, and the insertion shaft part 32 is flattened. The first and second elastic plates 22,
27 are respectively pushed up and down against elasticity. Then, as shown in FIG. 5, the stopper pin 24 of the first elastic plate 22 is guided to the communication hole 19 and pushed up, and its upper end 25 is inserted into the locking groove at the selected position of the fixed base plate 1. The stopper pin 24 locks the leg 11 against the fixed base plate 1 so that it does not pivot. Also, at the same time as the leg 11 is locked, the fifth
As shown in the figure, the locking portion 29 of the second elastic plate 27
is lowered and pushed into contact with the outer side of the wheel 18,
This locking portion 29 locks the wheel 18 so that it does not rotate. Further, the communication shaft portion 32 of the foot lever 31 is rotated, and the pushing portions 34 on both sides thereof are moved to the fifth position.
As shown in the figure, the point in time when the position is changed from the horizontal direction to the top and bottom is the point in time when the first and second elastic plates 22, 27 are pushed most against their elasticity, and therefore, this point is when the wheel 18 At the same time when the leg 11 having the wheel 18 is most strongly locked, the flat shaft portion 33 on one side is stopped by the stopper 26 of the first elastic plate 22, and the stopper 26 Even if the foot plate 39 is further depressed, the rotation of the flat shaft portion 33 in the clockwise direction in FIG. 5 is locked. Therefore, the traveling rotation of the wheel 18 and the pivoting movement of the leg 11 having the wheel 18 are simultaneously locked, and the rotation of the foot lever 31 is also locked.

Furthermore, when the foot lever 31 is rotated in the return direction, the insertion shaft portion 32 is supported by the opposing circular hole 30 and rotated, and the pushing portions 34 located above and below the insertion shaft portion 32 are rotated. The upper and lower pushing parts 34 are rotated, and the upper and lower pushing parts 34
The first and second elastic plates 22, 2
7, the first and second elastic plates 2
As shown in FIG. 1, the first and second elastic plates 22, 27 are brought into contact with flat shaft portions 33 located above and below, respectively, and the first and second elastic plates 22, 27 are connected to the flat shaft portions 33 located above and below. As the pushing is released, the stopper pin 24 is locked to the locking groove 3 and the wheel 1 is stopped.
The abutment of the locking portions 29 against the wheels 8 and 8 is simultaneously released, and therefore the lock of the wheel 18 and the lock of the leg 11 are released.

In the embodiment described above, the stopper 26 for locking the rotation of the flat shaft portion 33 is formed on the first elastic plate 22, but the stopper 26 may be formed on the second elastic plate 27. good.

(Effect of the invention) According to the invention, by stepping on and rotating the foot lever, the first and second elastic plates are simultaneously pushed up and down by the pushing part of the insertion shaft, and the first and second elastic plates are simultaneously pushed up and down. The stopper pin of the second elastic plate is pressed and locked in the locking groove of the fixed base plate, and the locking part of the second elastic plate is pressed and abutted against the outer side of the wheel, so that the rotation of the wheel is prevented. It is also possible to reliably lock the pivoting movement of the legs having the wheels. In addition, the stopper provided on at least one of the first and second elastic plates can reliably prevent further rotation of the shaft through which the foot lever that has locked the wheel and leg body, and can reliably maintain the locked state. can be retained. In addition, since the first and second elastic plates are formed separately, the first and second elastic plates are easy to process, and also easy to assemble into the locking groove of the wheel and fixed base plate. It is. In addition, by inserting the stopper pin of the first elastic plate into the communication hole of the top plate of the leg so that it can move up and down, the stopper pin can be smoothly moved up and down with respect to the locking groove of the fixed base plate, and this communication The stopper pin locked in the locking groove can be reliably supported by the hole. In addition, the insertion shaft of the foot lever is inserted into and removed from the opposite circular holes of the same shape formed at the top of the left and right leg pieces of the leg body, and is rotatably suspended horizontally, thereby making it possible to attach the caster to the mounting member. The foot lever can be easily changed and set to a position that is easy to operate depending on the position, and it is economical because there is no need to prepare foot levers for both right-hand and left-hand operation. Furthermore, the flattened release portion of the insertion shaft allows the elastic deformation of the first and second elastic plates to reliably release the locks caused by the respective stopper pins and locking portions.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Fig. 1 is a side view with a part of the caster cut away, Fig. 2 is a side view in the direction of the same arrow as above, and Fig. 3 is a section taken from line A to A in Fig. 1. Fig. 4 is a bottom view of the section B to B in Fig. 1;
FIG. 5 is a sectional view of a portion of the caster showing the locked state. 1... Fixed base plate, 2... Mounting hole, 3... Locking groove, 8, 15... Ball, 11... Leg body, 18...
... Wheel, 19 ... Communication hole, 22 ... First elastic plate, 24 ... Stopper pin, 26 ... Stopper, 27 ... Second elastic plate, 29 ... Locking part, 3
0... circular hole, 31... foot lever, 32... insertion shaft section, 33... flat release section, 34... pushing section.

Claims (1)

[Scope of Claim for Utility Model Registration] A fixing base plate having a circular mounting hole in the center that penetrates vertically and having a locking groove on the lower surface of the opening periphery of the mounting hole; and the above-mentioned mounting of this fixing base plate. A top plate that is rotatably mounted around a vertical axis through a ball in the hole and has a communication hole penetrating in the vertical direction that communicates with the locking groove of the fixed base plate; A leg body consisting of left and right leg pieces facing each other and forming circular holes of the same shape, a wheel rotatably supported on the lower ends of both leg pieces of this leg body, and an upper part of this wheel. a first end having one end fixed to the leg, and a stopper pin integrally provided at the other end to be vertically movably inserted into the communication hole and to be engaged with and disengaged from the locking groove; an elastic plate located between the first elastic plate and the upper part of the wheel, one end of which is fixed to the leg body, and a locking part formed at the other end facing the wheel; Second
an elastic plate, and an insertion shaft that is inserted between the first and second elastic plates and is horizontally suspended so as to be freely insertable and removable and rotatable in the circular holes of the left and right leg pieces, A pushing part that pushes and locks the stopper pin of the first elastic plate in the locking groove on the shaft, and a pushing part of the pushing part that pushes the locking part of the second elastic plate to the wheel. a pushing part located at a position to bring the stopper pin into contact; a flat release part for releasing the stopper pin from the locking groove; and a flat release part located at a release position of the flat release part to release the contact of the locking part from the wheel. a foot lever formed with a flat release portion; and an insertion shaft portion of the foot lever formed on at least one of the first and second elastic plates and pushing the first and second elastic plates. A caster characterized by comprising: a rotation stopper for locking a flat release part;