JPH086566Y2 - Caster for carrying heavy objects - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial application] This invention is intended to facilitate the easy change of the carrying direction when carrying heavy objects and the like, and the smooth carrying without being affected by the unevenness of the carrying traveling surface. Regarding casters for transporting goods.

[0002]

2. Description of the Related Art Conventionally, a carriage having traveling wheels attached to a lower surface of a pedestal has been used for carrying various heavy goods, and the trolley moves along with various heavy goods placed on the pedestal. I will let you. The traveling wheels attached to the lower surface of the base portion can be freely rotated in the horizontal direction in order to make the traveling direction freely, and the wheels are supported on the rotation base fixed to the lower surface of the base portion. Move while matching and matching the carrying direction.

At the time of changing and setting the carrying direction at this time, the fact that the wheels are supported by the rotating base in a freely directional manner is utilized. Among them, only the front part is forcibly changed in direction so as to be along the carrying direction and moved.

[0004]

However, in various factories and construction sites for carrying in and out and installing heavy objects such as large transformers, large machine tools, air conditioners, etc., these heavy objects are moved to predetermined places. When changing the direction of transportation, it may be difficult to change the direction due to its weight.

That is, the traveling wheels attached to the lower surface of the base must be forced to slide on the traveling surface in the predetermined direction or lifted when the direction is changed. This is because the weight of the heavy object is directly added to the sliding work or the like at this time, which makes it very difficult to slide the wheel surface in contact with the running surface. In addition, when turning, it is directed in a predetermined direction,
Since the set wheels are not fixedly maintained and rattling occurs, and the directionality is not sufficiently secured, the direction change may not be performed smoothly and reliably.

[0006] In addition, the traveling wheel on which the carriage is moved for carrying heavy objects has irregularities or steps, and the traveling wheels do not rotate smoothly and stop at these positions. Sometimes. This is because the rotation base is freely rotatable in the horizontal direction, but it is not set so that the elevation angle is arbitrarily adjusted, and because it has a rigid structure, it does not follow ups and downs of the running surface. This is because, even if there is a slight step or unevenness, it cannot stop over these and stops.

That is, for example, when a wheel is fitted into a concave portion such as a dent, the load of a transported object is concentrated on the wheel,
It is extremely difficult to escape from there, and if a wheel gets caught on a wiring member protruding above the floor, for example, it will not be able to get over it, making it impossible to move forward in the transport direction. It was In such a case, even if you try to escape from it by lifting the stopped wheel part, you have to lift it with a considerably heavy load, which is not only difficult, but also tilts the entire bogie. Occasionally, there was a danger that the transported goods would slip on the platform.

Therefore, the present invention has been devised in view of the existing circumstances as described above. For example, not only the direction of the carrying direction can be easily and smoothly changed during transportation, but also after the conversion. The directionality of the vehicle can be maintained fixed, and the wheel pedestal can be adjusted to a desired elevation according to the unevenness of the running surface, undulations, etc., and rolls at an elevation angle that conforms to the shape of the running surface for smooth running. An object of the present invention is to provide a caster for transporting a heavy load, which enables easy, easy, and safe transport of a heavy load that is transported.

[0009]

In order to achieve the above-mentioned object, in the present invention, a wheel support in which wheels 7 are supported on the lower surface of the caster base 1 on which the article P is directly or indirectly placed. In a caster in which the body 5 is rotatably connected in the horizontal direction via the joint body 10 and the bearing means 15 incorporated in the joint body 10, the wheel support body 5 is connected to the caster base 1 via the stopper means 30. It is possible to hold and stop at the relative turning position.

This stopper means 30 has a slide cylinder 32 arranged and fixed below the caster base 1 along the vertical direction, and a stopper pin 31 urged by an elastic force so as to project upward is slidably inserted vertically. An operation piece 34 connected to the stopper pin 31 is provided on the outside of the slide cylinder 32, while engaging grooves 35 with which the upper end of the stopper pin 31 engages are formed on the lower surface of the caster base 1 at regular intervals.

Further, the upper end of the stopper pin 31 of the stopper means 30 is formed into an inclined surface so that the direction of the inclined surface can be changed by turning the operation piece 34.

On the other hand, the wheel support 5 can be raised and lowered with respect to the caster base 1 via the spherical universal joint means 16.

This spherical universal joint means 16 has a shaft hole 4 formed in an upper surface of a wheel support 5 at a lower portion of a connecting flange 11 which is fitted in contact with an opening edge of a storage recess 3 formed in a lower surface of a caster base 1. A joint body 10 having a lower shaft 13 inserted therein is formed, and a projecting spherical surface 17 formed on the lower surface of the lower shaft 13 of the joint body 10 is provided on the bottom surface of the shaft hole 4 of the wheel support 5. The formed concave spherical surface 18 is circumferentially contacted with a predetermined gap between the bottom surface of the connecting flange 11 and the upper surface of the wheel support 5.

[0014]

In the caster for carrying heavy goods according to the present invention, the carrying direction for carrying the goods P is the bearing means 15 for freely rotating the caster base 1 in the horizontal direction, and the goods P. , The turning position with respect to the caster base 1 is set, and the stopper means 30 for holding the turning position adjusts and changes the turning position.

The stopper means 30 fixedly holds, at the turning position, the wheel support 5 which has been turned with respect to the caster base 1 in correspondence with the carrying direction of the traveling surface portion requiring turning. Wheel support 5 held
Makes the wheels 7 supported on this correspond to the changed carrying direction, and rolls the carried article P in a predetermined direction to change the direction.

At this time, the stopper pin 31 of the stopper means 30 engages with the engagement groove 35 at the peripheral edge of the lower surface of the caster base 1, holds the relative position of the wheel support 5 with respect to the caster base 1, and By releasing the engagement and setting it in the free state, it is possible to convey the conveyed object P in an arbitrary conveying direction without specifying the rolling direction of the wheel 7.

Further, the upper end of the stopper pin 31 formed on the inclined surface is horizontally rotated when the direction of the inclined surface of the stopper pin 31 is changed by rotating the operation piece 34 with respect to the caster base 1. To allow continuous rolling of the shape or vice versa.

The joint body 10 connecting the caster base 1 and the wheel support 5 is composed of a projecting spherical surface 17 and a concave spherical surface 18, and is a spherical universal joint means 1 which makes circumferential contact with a sphere pair.
6, the wheel support 5 with respect to the caster base 1
Incline at a free angle of elevation. At this time, the range of the elevation angle inclined is the bottom surface of the connecting flange 11 and the wheel support 5
It is set by a predetermined gap width with the upper surface.

Therefore, if there are undulations or irregularities on the transportation surface, the wheel support 5 will tilt freely along the undulation surface, forming a rolling surface that follows the undulation surface to form the wheels 7. Rotate to make the bogie itself run smoothly.

Further, the bearing means 15 for freely rotating the caster base 1 in the horizontal direction freely follows the carrying direction, which is combined with the upward and downward flexibility of the wheel support 5 in the spherical universal joint means 16. , Secures a free direction in terms of transportation and traveling.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In the drawings, reference character C indicates, for example, various kinds of goods P to be placed and to carry the goods P to carry them. The caster of the present invention is mounted on the lower surface of the base plate, for example, on the four corners thereof (see FIG. 4), and although not shown, it may be mounted on the lower surface of the base plate on which the goods P are placed. .

That is, the caster C of the present invention has a disk-shaped caster base 1 mounted on the lower surface thereof and wheels 7 so as to mount and support the transported object P directly or indirectly via a platform. Is rotatably supported and is horizontally rotatably connected to the lower surface of the caster base 1 through a joint body 10, and a wheel support that is horizontally rotated with respect to the caster base 1. Body 5
And a stopper means 30 for fixedly supporting it.

Further, the wheel support 5 can be raised and lowered with respect to the caster base 1, and therefore, the joint body 10 can be freely spherically connected to the caster base 1 so that the wheel support 5 can be raised and lowered. The joint means 16 is formed so as to follow the traveling direction of the conveyed object P and the like and the undulation of the conveyed traveling surface.

The caster base 1 is substantially disk-shaped in a plane, and has an uneven pattern formed on the surface thereof to carry the object P to be conveyed.
Safety is considered to prevent them from slipping when placed on them. Further, the caster base 1 is provided with a connection support hole 2 at a substantially central position thereof, and a connection protrusion J protruding from, for example, the lower surface of the transported object P is inserted into the connection support hole 2. As a result, the caster C of the present invention and the transported object P can be integrated during transportation and traveling (see FIG. 2). Of course, the connection support hole 2 is also opened on the upper surface of the wheel support 5 so as to communicate with the wheel support 5 which will be described later, so that the whole of the transported article P, the caster base 1, the wheel support 5 and the like can be integrated. It is highly desirable to do so.

Further, a recessed storage recess 3 is provided substantially in the center of the bottom of the caster base 1, and the wheel support 5 is mounted via the bearing means 15 mounted in the storage recess 3. Supports and connects so that it can rotate freely.

As shown in the figure, the wheel support 5 is a block-shaped wheel support 5 having a shaft hole 4 for inserting a lower shaft 13 of a joint body 10 to be described later on its upper surface, and a connecting arm portion 6 inclined to the lower part of the main body. Is integrally formed, and the axle 8 supporting the wheel 7 is inserted through the lower part of the connecting arm 6.
The wheels 7 in the illustrated example are arranged in a total of four on the front, rear, left and right sides of the main body of the wheel support 5 so that the wheels 7 can bear the load of the transported object P to be transported.

Further, the wheels 7 rotatably supported on the axle 8 are provided with cushion materials 9 on both sides thereof, and a wheel support including the wheels 7 is provided in a state in which a load such as a transported article P is applied. The axle 8, which occurs when the direction of the whole body 5 is changed,
The load on the wheels 7 is reduced, and smooth direction change can be achieved. Cushion material 9 shown
Is formed in the shape of a coil spring, but it can be changed to a spacer (cylindrical body) made of urethane resin, and another cushioning material or structure can be used instead. it can.

A tow connecting portion 20 for pulling and connecting the caster C itself of the present invention is integrally connected to the wheel support 5 in front of the connecting arm portion 6. As shown in the drawing, For example, a pulling shaft 2 in which ropes, hooks, and the like are connected between the left and right pulling arms 21 at the front of the main body, which has a substantially U-shape in a plane whose front is open.
It is constructed by mounting 2. In addition, this tow connection part 2
0 is integrally formed with the wheel support 5 in front of the wheel support 5 via a connecting body 23 having a cross-shaped cross section, for example, and is a caster in stopper means 30 described later provided on the wheel support 5. The engagement and disengagement with the peripheral edge of the base 1 can be performed.

In order to allow the wheel support 5 to roll in the horizontal direction with respect to the caster base 1 and to adjust the angle in the elevation direction freely, the joint body 10 is used. The bearing means 15 and the spherical universal joint means 16 are built in the device.

Thus, the joint body 10 is inserted into the storage recess 3 at the upper portion of the connecting flange 11 which is abuttingly mounted in the step portion on the inner surface of the opening edge of the storage recess 3 of the caster base 1. The shaft 12 is also formed in the lower part of the connecting flange 11 and in the upper surface of the wheel support 5 in the shaft hole 4
The lower shafts 13 to be inserted therein are provided so as to project.
As shown in FIG. 1, this joint body 10 has a donut-shaped stationary plate 14 that abuts and supports from a lower surface of a connecting flange 11 in a state where a bearing means 15 described later is housed in a housing recess 3 and a lower surface of a caster base 1. It is connected to the caster base 1 by screwing around the opening of the storage recess 3 of FIG.

As shown in FIGS. 1 and 2, the bearing means 15 has a thrust bearing structure which is housed in the gap between the outer peripheral surface of the upper shaft 12 and the inner peripheral surface of the housing recess 3.
(2) With the gap set between the upper end surface and the upper bottom surface of the storage recess 3, the upper shaft 12, that is, the joint body 10 can freely rotate in the storage recess 3 in the horizontal direction. In addition, the gap set between the upper end surface of the upper shaft 12 and the upper bottom surface of the storage recess 3 is mounted by abutting the outer peripheral edge portion of the coupling flange 11 in a step formed on the inner side surface of the opening edge of the storage recess 3. Formed when you do.

Further, as shown in FIG. 1, the spherical universal joint means 16 has a projecting spherical surface 17 formed on the lower surface of the lower shaft 13.
And a concave spherical surface 18 formed on the bottom surface of the shaft hole 4 of the wheel support 5, the bottom surface of the joint body 10 and the wheel support 5
Since the spherical surfaces 17, 18 are brought into close contact with each other along with the gap between the upper surface and the upper surface, the wheel support body 5 itself becomes the joint body 10.
A pair of spheres that can be tilted with respect to the caster base 1 is formed, and the elevation angle is freely adjusted with respect to the caster base 1. In this spherical universal joint means 16, the projecting spherical surface 17 may be formed on the wheel support 5, and the concave spherical surface 18 may be formed on the joint 10.

The projecting spherical surface 17 is formed as an outer peripheral curved surface of a substantially spherical body having a diameter slightly larger than that of the upper portion of the lower shaft 13, and the wheel supporting member is supported on the shaft portion surface of the upper portion of the lower shaft 13. The wheel support 5 and the joint body 10 are integrated by a set screw 19 which is screwed in from the outside of the body 5 and is pressed against the body 5, so that the wheel support 5 and the joint body 10 are prevented from coming off.

It should be noted that from the outside of the wheel support 5 so that an injection port for injecting a lubricant such as grease for smooth sliding of the circumferential contact surfaces of the spherical surfaces 17 and 18 communicates with the shaft hole 4. It has been opened.

Further, the stopper means 30 is shown in FIGS.
As shown in, the stopper pin 31 is elastically movable back and forth.
Is engaged with the lower surface of the caster base 1, and the stopper pin 31 shown in the figure corresponds to the peripheral position of the caster base 1.
Is arranged in the rear part of the planar U-shaped towing arm 21.

That is, a stopper pin 31 urged elastically so as to project upward is slidably inserted vertically into a slide cylinder 32 provided in the inner part of the pulling arm 21 along the vertical direction. An operation piece 34 connected to 31 is provided on the outer side of the slide cylinder 32, while engaging grooves 35 with which the upper end of the stopper pin 31 engages are formed at appropriate intervals on the peripheral edge of the lower surface of the caster base 1.

The upper end of the stopper pin 31 is formed into an inclined surface (see FIG. 1), and the stopper pin 3 is operated by the operation piece 34 or the like as the wheel support 5 itself turns in the horizontal direction.
By changing the direction of 1 itself, the inclined surface slides in contact with the edge of the engaging groove to forcibly avoid the stopper pin 31 itself downward. By doing so, the rolling movement of the wheel support 5 itself. Can be carried out smoothly.

The stopper pin 31 is made of an elastic material 3 such as a coil spring that is compressed inside the slide cylinder 32.
3, the upper end inclined surface is always projected above the slide cylinder 32, the stopper pin 31 itself is retracted to the lower position by the operation of the operation piece 34, and if necessary, the illustration is omitted. By holding the caster base 1 at the lower position via the coupling means, relative rotation between the caster base 1 and the wheel support 5 is always possible.

The operation piece 34 has a crank shape when viewed from the side surface connected to the lower end of the stopper pin 31 protruding from the lower end of the slide cylinder 32, presses the upper horizontal portion to release the engagement, and thereby the stopper. By rotating the pin 31 itself, the direction of the upper end inclined surface can be selected (see FIG. 3).

The engagement grooves 35 are arranged on the lower surface of the caster base 1 at intervals of, for example, 30 degrees (see FIG. 3) and have a substantially U-shaped cross section.

Next, to explain an example of use, as shown in FIG. 4, for example, connecting projections protruding from the lower surface of the transported article P are provided at four corners of the lower surface of various large and heavy transported articles P. Directly by inserting J into the connection support hole 2 (see FIG. 1,
(See FIG. 2) Moreover, the caster C of the present invention is indirectly mounted and set by arranging it on the lower surface of the base on which the goods P are placed. By pulling through the portion 20, the wheels 7 roll and move. The bearing means 1 allows the caster base 1 to rotate in the horizontal direction freely.
5, the transported object P, the turning position with respect to the caster base 1 can be set and adjusted by the stopper means 30 for holding the turning position, and if necessary, the engagement by the stopper means 30 can be made free, and the caster base The relative turning position of the wheel support 5 with respect to 1 is set freely.

At this time, for example, when it is mounted and set at the four corners of the lower surface of the conveyed article P, it can be used so that the front portion in the conveying direction can turn and the rear portion can prevent the turn. It is good to consider the followability.

Then, at the traveling surface portion requiring turning, the caster base 1 is made to correspond to the carrying direction.
The wheel support 5 is turned with respect to the wheel support 5, and the stopper pin 31 of the stopper means 30 is engaged with the engagement groove 35 at the turning position.
By engaging with the inside, the relative position of the wheel support 5 with respect to the caster base 1 is fixedly held. The wheel support 5, which is fixedly held, causes the wheels 7 supported on the wheel support 5 to correspond to the changed transport direction and roll in a predetermined direction to change direction.

When there is an ups and downs on the traveling surface during such transportation, the wheel support 5 tilts up and down along the ups and downs, and the wheels 7 rotate following the ups and downs. The object P itself can be smoothly transported (see FIG. 1). That is, with respect to the caster base 1 connected to the lower surface of the transported object P, the wheel support 5 is
By the spherical universal joint means 16 composed of the projecting spherical surface 17 and the concave spherical surface 18 that are in contact with each other in the joint body 10 for connecting the two, the inclined surface can be inclined at a free angle of elevation and the slope of the undulating surface on the transport running surface This is because the wheel support 5 inclines along the undulating surface.

Therefore, for example, even if the wheel 7 is fitted in a concave portion such as a dent on the transportation surface and the load is concentrated on the wheel 7, the wheel support 5 follows the inclination of the concave portion. By inclining, the wheel 7 can smoothly rotate and escape, and the wheel 7 can be attached to the wiring member or the like protruding on the floor surface.
Even if the object P is caught, the wheels 7 similarly rotate smoothly to get over it, and in addition to the fact that the horizontal state of the transported object P is almost maintained, the traveling of the transported object P is smoothed. I have to.

[0046]

The present invention is constructed as described above, and therefore, the stopper means 30 is provided after adjusting the relative turning position of the wheel support 5 with respect to the caster base 1.
It is possible not only to easily and smoothly change the direction of transportation during transportation, but also to maintain the directionality after the change fixed.

That is, the stopper means 30 has the engaging groove 35 in which the upper end of the stopper pin 31, which is elastically biased toward the upward protrusion inserted into the slide cylinder 32 arranged and fixed below the caster base 1, engages. Base 1
Since the array is formed on the lower surface at appropriate intervals, the relative turning position of the wheel support 5 with respect to the caster base 1 can be held and stopped so as to change the direction according to the carrying direction, and the holding stop. This makes it possible to change the direction of transportation. Moreover, this holding stop can be selected by engaging or releasing the operation piece 34 connected to the stopper pin 31. For example, when the article is used at four corners of the article P to be mounted, the direction is fixed at the rear part of the carrying direction. By keeping it in the front and allowing it to turn around freely, it is possible to cope with differently changed carrying directions.

Further, since the stopper pin 31 itself having the upper end formed in the inclined surface can be turned by the operation piece 34 connected to the stopper pin 31, the inclined surface is formed in the turning direction of the wheel support 5 with respect to the caster base 1. By positioning so as to face each other, it is possible to automatically hold the engagement after conversion.

Further, the wheel support 5 is freely adjusted with respect to the caster base 1 in accordance with the unevenness of the running surface, the undulations, etc., and the wheels 7 roll at an angle of elevation according to the running surface shape. Since the object P is smoothly driven, even a considerably heavy object P can be easily, easily and safely transported.

Moreover, in the joint body 10 for connecting the caster base 1 and the wheel support body 5, the projecting spherical surface 17 of the lower surface of the lower shaft 13 of the joint body 10 is formed on the upper surface of the wheel support body 5. Since the spherical universal joint means 16 forming a spherical pair to be in circumferential contact with the concave spherical surface 18 formed on the bottom surface of the shaft hole 4 is provided, the wheel support 5 itself is elevated with respect to the caster base 1 at a free inclination angle. This is because the elevation range corresponds to the predetermined gap width set between the bottom surface of the connecting flange 11 and the top surface of the wheel support 5.

Further, since the joint means 10 also incorporates the bearing means 15 for freely rotating the caster base 1 in the horizontal direction, the direction change freely following the carrying direction of the carriage itself is facilitated. In addition to the flexibility of the wheel support 5 in the spherical universal joint means 16,
Even a transported object P having a considerable weight can be smoothly transported in any direction on the transportation surface.

As described above, according to this invention,
For example, it is extremely suitable for loading and unloading and installing heavy objects such as large transformers, large machine tools, and air conditioners, and for carrying various kinds of goods at other factories and construction sites. Not only can the transport direction be changed easily and smoothly on the way, but the directionality after the change can be fixedly maintained, and even if there are undulations or irregularities on the transport surface, it is possible to overcome this. It has excellent practical effects such that it can be transported smoothly and can be provided at a low cost with a simple structure.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view.

FIG. 2 is a partially cutaway front view.

FIG. 3 is a partially cutaway plan view.

FIG. 4 is a perspective view of a transportation and use state.

[Explanation of symbols]

 C Caster J Connection protrusion P Transported goods 1 Caster base 2 Connection support hole 3 Storage recess 4 Shaft hole 5 Wheel support 6 Connection arm part 7 Wheel 8 Axle 9 Cushion material 10 Joint body 11 Connection flange 12 Upper shaft 13 Lower shaft 14 fixed plate 15 bearing means 16 spherical universal joint means 17 projecting spherical surface 18 concave spherical surface 19 set screw 20 pulling connection 21 pulling arm 22 pulling shaft 23 connecting 30 stopper means 31 stopper pin 32 slide tube 33 elastic material 34 operation Piece 35 Engagement groove

Claims (1)

[Scope of utility model registration request] 1. A wheel support body, on which wheels are supported, is horizontally rotatable through a joint body and bearing means incorporated in the joint body on a lower surface of a caster base on which a transported object is directly or indirectly placed. In the caster formed by connecting to the wheel base, the lower shaft inserted into the shaft hole formed in the upper surface of the wheel support is projected from the lower part of the connecting flange that abuts against the opening edge of the storage recess formed in the lower surface of the caster base. The joint spherical body is formed, and the convex spherical surface formed on the lower shaft lower surface of this joint body is circumferentially contacted with the concave spherical surface formed on the bottom surface of the shaft hole of the wheel support, and the bottom surface of the connecting flange and the wheel support are supported. Stopper means for forming a spherical universal joint means having a predetermined gap with the upper surface of the body, and for holding and stopping the wheel support at a turning position relative to the caster base. Is provided, and this stopper means is
A stopper pin that is elastically urged to project upward is slidably inserted vertically into the slide cylinder that is arranged and fixed below the caster base in the vertical direction, and the operation piece connected to this stopper pin is inserted into the slide cylinder. On the other hand, the engaging grooves engaging with the upper end of the stopper pin are formed on the lower surface of the caster base at regular intervals while protruding outward, and the upper end of the stopper pin is formed on the inclined surface, and the inclined surface direction is set to the operation piece's direction. A caster for carrying heavy objects, characterized in that it can be turned over by operation.