JP3357244B2 - Caster with stopper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main body to which a mounting portion is attached, wherein a wheel is rotatably provided, and a brake lever having a lock pin provided at a tip is swingably supported in the main body. A pin guide for guiding the lock pin is formed in the main body, and the lock pin is formed in a plurality of grooves for wheel lock formed on an inner peripheral wall of the wheel and in which the lock pin guided by the pin guide is inserted. At least the trailing facing surface of the facing surface extending in the radial direction and abutting on the trailing side is formed so as to be inclined so that the facing space becomes narrower as it is closer to the center, and prevents the pin from falling from the groove. The present invention relates to a caster with a stopper that prevents release of a locked state.

[0002]

2. Description of the Related Art As shown in FIG. 7, a conventional caster with a stopper has a wheel W rotatably disposed in a main body H attached via a swing mechanism, and a lock pin P disposed at a tip. A brake lever L is swingably supported in the main body H, and a pin guide G for guiding the lock pin P is formed in the main body H, formed on an inner peripheral wall of the wheel W, and guided by the pin guide G. The opposing surfaces S of the plurality of wheel locking grooves M, which extend in the radial direction and abut against the lock pins P, are formed at equal intervals, and the plurality of wheel lock grooves M are formed at equal intervals. The closer the opposing surface S is to the center of the wheel W, the wider the opposing interval becomes.

[0003]

In the conventional caster with a stopper, the opposed surfaces S of the plurality of grooves M for locking the wheel into which the lock pins P are inserted are formed at equal intervals, or As the facing surface S is closer to the center of the wheel W due to long-term use, the facing distance increases, so that the lock pin P in contact with the facing surface S falls from the facing surface S as is clear from FIG. Has a problem that the lock pin P falls from the groove M to release the locked state of the caster.

In view of the above, the present inventor has proposed a caster with a stopper attached by an attachment portion, in which a plurality of grooves for locking a wheel into which a lock pin is inserted extend in a radial direction in contact with the lock pin and oppose each other. At least the trailing side facing surface is formed so as to be inclined so that the facing distance becomes narrower toward the center, and a vector in a direction opposite to the direction of falling from the facing surface to the lock pin abutting on the facing surface. Focusing on the technical idea of the present invention that the components act, a book that achieves the object of preventing the lock pin from being released by preventing the lock pin from falling out of the locking groove by further research and development. The invention has been reached.

[0005]

A caster with a stopper according to the present invention (first invention according to claim 1) includes a main body attached by an attaching portion, a wheel rotatably disposed in the main body, A brake lever, which is swingably supported in the main body and has a lock pin provided at a tip thereof, and a brake lever formed in the main body for guiding the lock pin ;
Engagement to lock the lock pin at a lock position away from the end
A lock pin formed on an inner peripheral wall of the wheel and guided by the pin guide, and a plurality of grooves for locking the wheel. extending of the lock pin groove radially abuts in which facing surfaces of at least the trailing side of the facing surface that faces are formed by inclined obliquely.

In the caster with a stopper according to the present invention (the second invention according to the second aspect), in the first invention, the distance between the opposed surfaces of the groove for locking the wheel is narrower as both of the opposed surfaces are closer to the center of the wheel. It is formed so as to be inclined.

In the caster with a stopper according to the present invention (third invention according to claim 3), in the first invention or the second invention, the longitudinal axis of the brake lever and the facing surface of the wheel locking groove have an acute angle. It is configured to achieve this.

A caster with a stopper according to the present invention (a fourth invention according to claim 4) includes a main body mounted via a swing mechanism, a wheel rotatably disposed in the main body, and a wheel inside the main body. a swingably supported by tip locking pin is disposed Rutotomoni a central portion swingably pin support the <br/> were brake lever, with formed in said main body for guiding the locking pin , Lock position away from one end
A lock groove formed with a lock groove for locking the lock pin.
G-shaped pin guides, a plurality of facing surfaces extending in the radial direction and being opposed to the inner peripheral wall of the wheel, and the lock pin guided by the pin guide is interposed, and a plurality of grooves for wheel locking are provided. Wherein the longitudinal axis of the brake lever and the facing surface of the groove for locking the wheel form an acute angle.

In the caster with a stopper according to the present invention (fifth invention according to claim 5), in the fourth invention, the position of the fulcrum of the brake lever is the same as that of the longitudinal axis of the brake lever and the wheel locking groove. The facing surface is determined to form an acute angle.

In the caster with a stopper according to the present invention (the sixth invention according to claim 6), in the fourth invention, the arrangement angle of the brake lever is such that the angle between the longitudinal axis of the brake lever and the groove for locking the wheel is adjusted. The facing surface is determined to form an acute angle.

(Function) In the caster with a stopper according to the first aspect of the present invention, the wheel is rotatably disposed in the main body attached by an attaching portion, and is supported swingably in the main body. the lock pin, which is arranged at the distal end of the brake lever, Rutotomoni guided by the slit-shaped pin <br/> pattern guide formed in said main body, said slit
The pin formed at a position apart from one end of the pin guide
The locking pin is locked in the locking position by the locking groove.
The guided lock pin is inserted into the plurality of wheel locking grooves formed on the inner peripheral wall of the wheel, the wheel is locked, and at least the facing surface of the wheel locking groove facing the locking pin is locked. since the facing surface of the trailing side are formed by inclined obliquely, it acts on the locking pin which abuts against the facing surface of the trailing side, the inclined direction of the force does not fall from the opposing surface was It is to let.

The caster with a stopper according to the second invention having the above-mentioned structure is formed in such a manner that, in the first invention, the opposed surfaces of the groove for locking the wheel are both closer to the center of the wheel so that the opposed interval becomes narrower. Therefore, a force is applied to the lock pin that comes into contact with the two opposing surfaces so as not to fall from the inclined opposing surface.

A caster with a stopper according to a third aspect of the present invention, wherein the longitudinal axis of the brake lever and the facing surface of the wheel locking groove form an acute angle in the first or second aspect of the invention. Therefore, a force of a vector component in a direction opposite to the direction of falling from the inclined opposing surface is applied to the lock pin abutting on the opposing surfaces.

[0014] Stopper caster of the fourth aspect of the present invention having the above described construction, the wheel rotatably in said main body which is attached via a swing mechanism is provided, Rutotomoni is swingably supported by the body , Swingable in the center
The lock pin provided at the tip of the brake lever supporting the pin is provided in the slit formed in the main body.
Guided by Jo pin guide Rutotomoni, the scan
Formed at a distance from one end of the lit pin guide
The lock pin is engaged with the lock position by the locking groove.
Stopping , the guided lock pin is inserted into the plurality of wheel locking grooves formed on the inner peripheral wall of the wheel to lock the wheel, and the longitudinal axis of the brake lever and the groove for locking the wheel are locked. Since the opposed surfaces of the above form an acute angle, with respect to the lock pin abutting on the opposed surfaces,
A force of a vector component in a direction opposite to the direction of falling from the opposing surface is applied.

According to a fifth aspect of the present invention, in the caster with a stopper according to the fifth aspect, the longitudinal axis of the brake lever and the facing surface of the groove for locking the wheel are formed at an acute angle by adjusting the position of the fulcrum of the brake lever. Therefore, a force of a vector component in a direction opposite to the direction of falling from the opposing surface is applied to the lock pin abutting on the opposing surfaces.

According to a sixth aspect of the present invention, in the caster with a stopper according to the fourth aspect, the arrangement angle of the brake lever is adjusted so that the longitudinal axis of the brake lever and the wheel locking groove are opposed to each other. Since the surface is at an acute angle, a force of a vector component in a direction opposite to the direction of falling from the opposing surface is applied to the lock pin abutting on the opposing surfaces.

[0017]

In the caster with a stopper according to the first aspect of the present invention having the above-mentioned effects, at least the facing surface on the trailing side of the facing surface of the groove for locking the wheel is formed to be inclined. Therefore, a force is applied to the lock pin that is in contact with the opposing surface on the trailing side so that the pin does not fall from the inclined opposing surface. To prevent the lock from being released ,
Formed at a distance from one end of the lit pin guide
The lock pin is engaged with the lock position by the locking groove.
Stops, so that the lower surface is coupled with the inclined facing surface.
When effectively preventing the lock pin from falling from the opposite surfaces,
This has the effect.

The caster with a stopper according to the second aspect of the present invention having the above-mentioned action, in addition to the effect of the first aspect, is inclined such that the distance between the opposed surfaces of the groove for locking the wheel is closer to the center of the wheel. Since it is formed to apply a force in a direction not falling from the inclined opposing surface to the lock pin abutting on both opposing opposing surfaces, the groove of the pin is securely formed. The effect of preventing the lock state from being released by preventing the lock member from dropping from the both opposing surfaces.

The caster with a stopper according to the third aspect of the present invention having the above-mentioned effect is characterized in that, in addition to the effects of the first or second aspect, the longitudinal axis of the brake lever and the facing surface of the wheel locking groove form an acute angle. Since it is configured in
Since the force of the vector component in the direction opposite to the direction of falling from the inclined opposing surface is applied to the lock pin abutting on the opposing surfaces, the opposing surfaces of the groove of the pin are more reliably. There is an effect that the lock state can be prevented from being released by preventing falling from the lock state.

In the caster with a stopper according to the fourth aspect of the present invention, the longitudinal axis of the brake lever whose center portion is swingably supported by a pin and the opposed surface of the wheel locking groove form an acute angle. Therefore, a force of a vector component in a direction opposite to the direction of falling from the opposing surface is applied to the lock pin abutting on the opposing surfaces.
This has the effect of reliably preventing the groove of the pin from dropping from the opposing surfaces to prevent release of the locked state.
Together with one end of the slit-shaped pin guide.
To the locked position by the locking groove formed in the closed position.
Since the lock pin is locked, the inclined facing surface
Together with the lock pin from falling from the opposite surfaces.
This has the effect of effectively preventing it.

According to the fifth aspect of the present invention, the caster with a stopper having the above-described operation has the same effect as that of the fourth aspect, except that the position of the fulcrum of the brake lever is adjusted so that the lock pin abuts on the opposite surfaces. Since the force of the vector component in the direction opposite to the direction of falling from the opposing surface is applied, a simple change prevents the groove of the pin from dropping from the opposing surfaces and prevents the lock from being released. Play.

The caster with a stopper according to the sixth aspect of the present invention having the above-described effects, in addition to the effect of the fourth aspect, is characterized in that the arrangement angle of the brake lever is adjusted, so that Then, a force of a vector component in a direction opposite to the direction of falling from the opposing surface is applied, so that a simple change prevents the groove of the pin from dropping from the opposing surfaces and prevents release of the locked state. This has the effect.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention are described below.
This will be described with reference to the drawings.

(First Embodiment) A caster with a stopper according to a first embodiment comprises a main body 1 mounted via a swing mechanism 11 as shown in FIGS.
A wheel 2 rotatably disposed in the body, a brake lever 3 pivotally supported in the main body 1 and having a lock pin 31 disposed at a tip thereof, and a lock pin 31 formed in the main body 1. , And a plurality of grooves 5 for locking the wheels formed on the inner peripheral wall of the wheel 2 and having the lock pins 31 interposed therebetween.
Of the brake lever 3 and the facing surface 51, 52 of the groove 5 for locking the wheel are formed so that the distance between the facing surfaces 51, 52 is closer to the center of the wheel. Are configured to form an acute angle.

As shown in FIGS. 1 to 3, the main body 1 is attached to a lower part of the apparatus by a flange portion 12 which constitutes an attaching portion provided on an upper part of the head dropping mechanism 11, and an upper end is provided with the neck. It is constituted by a member having a semicircular T-shaped cross section integrally formed at the lower end of a leg 13 extending in the up-down direction connected to the swing mechanism 11.

As shown in FIGS. 1 to 3, the wheels 2 are independently rotatably locked to both ends of a pin 20 constituting an axle inserted in the lower center of the main body 1, and are provided with two wheels. Blind lids 23, 24 for concealing the pins 20, which are inserted in the central recesses of the U-shaped cross-sections 21 and 22 to prevent them from falling off after being inserted, are provided. Is fitted.

The brake lever 3 is shown in FIGS.
As shown in FIG. 2, at a position approximately 45 degrees counterclockwise from the uppermost portion of the main body 1, a pin engaged with a pair of brackets 14 projecting obliquely downward from the arc-shaped inner peripheral wall of the main body 1. 32, a substantially central portion thereof is swingably supported, and a lock pin 3 is provided at a tip located inside the main body 1.
An operating portion 33 for swinging the brake lever 3 in a counterclockwise direction is formed at the other end protruding through the outer peripheral wall of the main body 1.

As shown in FIG. 4, the pin guide 4 has a substantially square shape in which the lock pin 31 formed vertically in the center of the semicircular vertical wall 15 of the main body 1 is inserted. A locking groove 41 for locking the lock pin 31 at a lock position is formed at a position slightly lower than the upper end of the slit 40 having a slit shape.

As shown in FIG. 1, the wheel locking grooves 5 are formed on the inner peripheral walls of the wheels 21 and 22, and the opposing surfaces 51 and 52 constituting the wheel locking grooves 5 are both formed on the wheels. The wheel 2 is locked by inserting the lock pin 31 guided by the pin guide 4 so as to be inclined so that the facing distance becomes narrower toward the center.

That is, the groove 5 for locking the wheel is formed so that the number of grooves is 16 as shown in FIG. 1, and the adjacent surface forming the convex portion of the groove is 6 degrees with respect to the neutral shaft. It forms an angle of 0.5 degrees and both sides are formed to form an angle of 13 degrees.

As is apparent from FIG. 1, in the locked state of the wheels, the brake lever 3 is disposed obliquely upward and inclined, and the adjacent surface forming the convex portion of the groove 5 for locking the wheels is 13 degrees. 5, the longitudinal axis of the brake lever 3 and the opposing surfaces 51, 52 of the groove 5 for locking the wheels form an acute angle, as is clear from FIG. is there.

In the caster with a stopper according to the first embodiment having the above-described structure, the wheels 2 are rotatably disposed in the main body attached by the flange portion 12 via the oscillating mechanism 11. The lock pin 31 disposed at the tip of the brake lever 3 that is swingably supported on the base is guided by the pin guide 4 formed in the main body 1, and the guided lock pin 31 is The wheel is locked by being inserted into the plurality of wheel locking grooves 5 formed on the inner peripheral wall of the wheel 2.

The opposed surface 5 of the wheel locking groove 5
Since both the first and the second 52 are formed so as to be inclined such that the closer the center is to the center of the wheel, the smaller the distance between the opposite surfaces 51 and 52 is. A force is applied in a direction that does not drop from the opposing surfaces 51 and 52.

That is, in the first embodiment, FIG.
As shown in FIG. 5, the longitudinal axis of the brake lever 3 and the opposing surfaces 51, 52 of the groove 5 for locking the wheels are formed so as to form an acute angle. As shown in FIG. The lock pin 31 abutting on 51 and 52
Then, the force of the vector component Vu in the direction opposite to the direction of falling from the inclined opposing surfaces 51 and 52 is applied.

The caster with a stopper according to the first embodiment having the above-mentioned action is formed so that the opposed faces 51, 52 of the groove 5 for locking the wheels are closer to the center of the wheel, so that the opposed interval becomes narrower. The lock pin 31 abuts on the opposed surfaces 51 and 52 facing each other.
In this case, a force is applied in a direction that does not drop from the inclined opposing surfaces 51 and 52, so that the lock pin 31 is reliably prevented from falling from the opposing surfaces 51 and 52 of the groove 5. Thus, the lock state is prevented from being released.

In the caster with a stopper of the first embodiment, the longitudinal axis of the brake lever 3 and the facing surfaces 51 and 52 of the groove 5 for locking the wheels form an acute angle. As shown in FIG. 5, the force of the vector component Vu in the direction opposite to the direction of falling from the inclined opposing surfaces 51, 52 is applied to the lock pin 31 abutting on the opposing surfaces 51, 52. The two opposing surfaces 5 of the groove 5 of the lock pin 31 are more reliably provided.
This has the effect of preventing the locks from being released by preventing them from dropping from the first and second members 52.

Further, in the caster with a stopper according to the first embodiment, the two wheels 21 and 22 which are two wheels independently rotatably locked at both ends of the pin 20 are a common molded product formed by the same mold. Therefore, assembling management is easy, assembling errors are reduced, mold costs are reduced, and the cost can be reduced by increasing (doubling) the production quantity.

Further, as shown in FIG. 4, the casters with stoppers of the first embodiment are formed in the substantially square-shaped slits 40 formed vertically in the center of the semicircular vertical wall 15 of the main body 1. As a result, the lock pin 31 is guided, thereby facilitating the insertion of the lock pin 31 and locking the lock pin 31 at the lock position at a position slightly lower than the upper end of the notch-shaped slit 40. The locking pin 41 is formed in combination with the inclined opposing surfaces 51 and 52 of the groove 5.
There is an effect that the groove 5 can be effectively prevented from dropping from the opposing surfaces 51, 52.

(Second Embodiment) A caster with a stopper according to a second embodiment, as shown in FIG. 6, is positioned at an angle of approximately 45 degrees counterclockwise from the top of the main body 1.
A substantially central portion is swingably supported by a pin 32 fixed to a pair of brackets 14 projecting upward from the arc-shaped outer peripheral wall of the main body 1, and is disposed at a tip located inside the main body 1. When the lock pin 31 is inserted into the groove 5 for locking the wheel, the lock pin 31 is disposed substantially horizontally. Therefore, the facing surfaces 51 and 52 of the groove 5 for locking the wheel are formed in the radial direction of the wheel. Also, the longitudinal axis of the brake lever 3 and the facing surfaces 51 and 52 of the groove 5 for locking the wheels can be configured to form an acute angle.

In the caster with a stopper according to the second embodiment having the above-described structure, the brake lever 3 is disposed horizontally in the locked state, so that the longitudinal axis of the brake lever 3 and the groove 5 for locking the wheel are formed. The opposing surfaces 51 and 52 are formed at an acute angle, and the opposing surfaces 51 and 5 are formed.
Since the force of the vector component in the direction opposite to the direction of falling from the inclined opposing surfaces 51 and 52 is applied to the lock pin 31 abutting on the lock pin 31, the two opposing surfaces of the groove 5 of the lock pin 31 are reliably formed. This has the effect of preventing the locks from being released from being locked by preventing them from falling from the locks 51 and 52.

In the caster with a stopper according to the second embodiment, the brake lever 3 is arranged only horizontally in the locked state, and the groove 5 for locking the wheel is formed in the radial direction. Therefore, there is an effect that the above effect can be realized with a small change.

The above-described embodiments have been described by way of example only, and the present invention is not limited to these embodiments. Those skilled in the art will recognize from the claims, the detailed description of the invention, and the drawings. Modifications and additions are possible without departing from the technical idea of the present invention.

In the above-described first embodiment, as an example, the entire area of the opposing surfaces 51 and 52 of the groove 5 for locking the wheel is formed so as to be inclined such that the closer the center is to the center of the wheel, the narrower the opposing interval is. Although an example has been described, the present invention is not limited thereto, and an embodiment in which the end near the center of the facing surface is chamfered to facilitate insertion of the lock pin by the guide of the pin guide is also adopted. Can be done.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view showing a caster with a stopper according to a first embodiment of the present invention.

FIG. 2 is a partially cutaway side view showing an engagement relationship between a lock pin and a groove in the first embodiment.

FIG. 3 is a front view showing the caster with a stopper according to the first embodiment.

FIG. 4 is a partially enlarged view showing a relationship between a pin guide and a lock pin in the first embodiment.

FIG. 5 is an explanatory diagram showing a vector component of an acting force acting on the facing surface of the groove from the lock pin in the first embodiment.

FIG. 6 is a partially cutaway side view showing a caster with a stopper according to a second embodiment of the present invention.

FIG. 7 is a partially cutaway side view showing a conventional caster with a stopper.

FIG. 8 is an explanatory diagram showing a vector component of an acting force acting on the opposing surface of the groove from the lock pin in the conventional caster with a stopper.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 11 Swing mechanism 2 Wheel 3 Brake lever 31 Lock pin 4 Pin guide 5 Wheel locking groove 51, 52 Opposing surface

Continuation of front page (56) References JP-A-60-110505 (JP, A) JP-A-6-55903 (JP, A) JP-A-9-272302 (JP, A) JP-A-8-67107 (JP, A) , A) Japanese Utility Model Showa 60-150103 (JP, U) Japanese Utility Model Application Hei 2-54603 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60B 33/00

Claims (6)

(57) [Claims] 1. A main body attached by an attaching portion, a wheel rotatably disposed in the main body, a brake lever rotatably supported in the main body and having a lock pin disposed at a tip thereof, preparative When formed within said body for guiding the locking pin
At the same time, lock the lock pin at a lock position
A slit-shaped pin guide formed with a locking groove for stopping , and a plurality of grooves for locking the wheel through which the lock pin formed on the inner peripheral wall of the wheel and guided by the pin guide is interposed. stopper casters, characterized in that at least opposed surfaces of the trailing side of the facing surface that faces extending in contact with the radial direction to the locking pin of the groove for the wheel lock is formed by inclined obliquely. 2. The caster with a stopper according to claim 1, wherein both of the opposing surfaces of the groove for locking the wheel are formed so that the distance between the opposing surfaces becomes smaller as being closer to the center of the wheel. . 3. The caster according to claim 1, wherein the longitudinal axis of the brake lever and the facing surface of the wheel locking groove form an acute angle. 4. A body which is attached via a swing mechanism, a wheel which is rotatably disposed within the body, the lock pin to the distal end is swingably supported by the body is disposed Rutotomoni a brake lever which is swingably pin supporting the central portion and being formed in said body for guiding the locking pin DOO
At the same time, lock the lock pin at a lock position
A slit-shaped pin guide formed with a locking groove for stopping, and a plurality of opposing surfaces extending in the radial direction and facing the inner peripheral wall of the wheel, and the lock pin guided by the pin guide is inserted. And a plurality of grooves for locking the wheels, wherein a longitudinal axis of the brake lever and the facing surface of the grooves for locking the wheels are formed at an acute angle. 5. The position of the fulcrum of the brake lever according to claim 4, wherein the position of the fulcrum of the brake lever is determined so that the longitudinal axis of the brake lever and the facing surface of the groove for locking the wheel form an acute angle. Caster with stopper. 6. The brake lever according to claim 4, wherein the arrangement angle of the brake lever is determined so that the longitudinal axis of the brake lever and the facing surface of the groove for locking the wheel form an acute angle. Caster with stopper.