JP3095012B2 - Level foot device for transfer case - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a level foot device for a transport case for mounting a case main body having a moving caster on a floor and adjusting the height.

[0002]

2. Description of the Related Art An example of a conventional level foot device for a transfer case is shown in FIGS. In the conventional example shown in FIGS. 3 and 4, a level foot 30 including a pedestal 30A and a male screw portion 30B protruding above the pedestal 30A is provided. The level foot 30 is adapted to be screwed into the bottom plate 20A of the case body 20. Here, reference numeral 20A denotes a level foot 30.
Shows a female screw portion formed so that the male screw portion 30B of FIG. Reference numeral 11 denotes a caster equipped with a moving roller 11A. When not in use, the level foot 30 is stored in the bottom plate 20A of the case main body 20 in a state shown by a dashed line in FIG. Also, at the time of use,
The level foot 30 is rotated to extend the male screw portion 30B downward, so that the level foot 30 is entirely lowered and grounded. Further, the level foot 30 is rotated from this grounded state to protrude the level foot 30 beyond the height of the caster 11, so that the caster 11 floats above the grounding surface, thereby supporting the case body 20 (FIG. 4). reference). When the case body 20 is moved to another place again, the level foot 30 is connected to the case body 2.
The caster 11 is grounded by rotating the caster 11 in a direction approaching zero, and the case main body 20 is thereby made independent and movable. In consideration of the fact that the slope may have a large slope when moving, the male screw portion 30B may be rotated as it is to separate the level foot 30 completely from the ground contact surface, as shown by the dashed line in FIG. The structure is such that it is raised until it hits the bottom plate 20A of the main body 20. Here, the symbol θ1 indicates a slope angle at which a slope can be climbed when climbing a slope.

[0003]

However, in the above conventional example, when the level foot is not used, the male screw portion is stored in the case main body, so that the level foot is stored in the case main body. There has been an inconvenience that the mounting arrangement of the device is limited. Also, even when the level foot is completely separated from the ground contact surface and rises until it hits the bottom plate of the case body outside the case body, the slope angle at which the slope can be climbed when climbing the slope is limited by the level foot. If the level foot needs to be removed, the case body must be lifted, which makes the operation difficult. The present applicant has already made a proposal to solve such a problem of the conventional one (see Japanese Patent No.
No. 91816). This transport case level foot device is provided with a female screw portion directed downward on the case body,
The female screw portion is screwed with one end of an adjusting screw having a threaded portion at both ends, and a screw fixing mechanism for fixing the female screw portion and one end of the adjusting screw portion by an external force is provided. When the leveler is rotatably screwed to the other end of the adjusting screw at the boundary between the screw portions, and the leveler member is screwed into the screw at the other end of the adjusting screw by a predetermined distance. Further, the distance between the grounding surface of the caster and the leveler member is set so as to be longer than the length of the screw portion at one end of the adjusting screw. Thus, the level foot device for the transport case can be removed from the case main body without lifting the case main body. However, even with this level foot device for a transport case, in order to attach or detach it to / from the case main body, the work had to be performed while looking into the bottom plate of the case main body, which caused difficulties in the work. . In addition, there is a drawback that when the case body is subjected to earthquake countermeasures (fall prevention), it is necessary to newly prepare equipment and fix the case body to the ground surface (floor or the like). An object of the present invention is to provide a level foot device for a transport case that can improve workability when attaching and detaching the case to and from the case body and that can easily fix the case body to a ground surface.

[0004]

In order to achieve the above object, the present invention provides a case body provided with a downwardly threaded female screw portion, and the female screw portion has one end of an adjusting screw having screw portions formed at both ends. A transfer case level provided with a screw fixing mechanism for screwing the screw portion and fixing the female screw portion and the screw portion at the one end of the adjusting screw by an external force at a boundary portion of each screw portion of the adjusting screw. In the foot device, a square hole of a screw fixing mechanism for fixing the female screw portion and the screw portion of the one end by an external force is formed on an end surface of the screw portion of the one end that is screwed with the female screw portion, and the other end of the adjusting screw is formed. The end screw portion is provided with a leveler member penetrating a female screw hole screwed with the other end screw portion, and the mount portion is rotatably provided on the leveler member. .

As described above, since the square hole of the screw fixing mechanism for fixing the female screw portion and the screw portion of the one end by an external force is formed on the end surface of the screw portion at one end screwed with the female screw portion, The adjustment screw can be attached and removed from inside. In addition, since the leveler member provided on the screw portion at the other end of the adjusting screw passes through a female screw hole screwed with the screw portion at the other end, the leveler member is opposite to the screw side of the screw portion at the other end. Can be screwed with another screw member.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. Here, the same components as those of the above-described conventional example are denoted by the same reference numerals. In the present embodiment, the case body 20 provided with the casters 11 for movement shown in FIG. And in this female screw part 20a,
The screw 1C at one end of the adjusting screw 1 having the screw portions 1B and 1C formed at both ends is screwed, and the female screw 20a and the screw 1C at one end of the adjusting screw 1 are fixed by an external force. A hexagonal hole (square hole) 1D as a screw fixing mechanism to be tightened is provided at one end of the screw portion 1C, and a bolt head 1A as the screw fixing mechanism is provided at each screw portion 1 of the adjusting screw 1.
It is provided at the boundary between B and 1C. That is, a bolt head 1A as a screw fixing mechanism for fixing the female screw portion 20a and the screw portion 1C at one end of the adjusting screw 1 by an external force.
Is provided at the boundary between the threaded portions 1B and 1C of the adjusting screw 1, and the female threaded portion 20 and the one-sided threaded portion 1C are attached to the end surface of the one-sided threaded portion 1C to be screwed with the female threaded portion 20. Hexagonal hole 1D of screw fixing mechanism to fix by external force
Is formed. Here, the screw fixing mechanism is a portion to which a rotational force is input via the fastening tool when the fastening tool is fitted.

A screw portion 1B on the other end of the adjusting screw 1
Has a female screw hole 2A screwed with the screw portion 1B at the other end,
On the opposite side to the screwing side of the screw portion 1B, there is provided a leveler member 2 through which another screw member is threadably inserted. The inner edge 3A formed on the mount 3 is press-fitted into the protrusion 2C on one end side of the leveler member 2, and is disposed in the recess 2D of the leveler member 2. The mount part 3 is rotatably fitted to the leveler member 2.

Further, the total length Lmax of the level foot device 10 of the present embodiment at the maximum extension and the total length Lmin at the maximum contraction of the level foot device 10 are shown.
And the height L4 of the caster 11 used during movement has a relationship of Lmin <L4 <Lmax (1).
Assuming that the length of the screw portion 1C inserted into the female screw 20a provided below the case body 20 is L1, L1 <(L4
-Lmin)... The dimensions are determined so that the relationship of (2) holds. More specifically, the leveler member 2 of FIG. 1 is formed in a stepped cylindrical shape, and a female screw hole 2A opened at the center is provided at an upper portion thereof so as to penetrate to a lower portion. Reference numeral 2B indicates a two-sided width for manual and tool rotation. And
A screw portion 1B protruding below the adjusting screw 1 is screwed into a female screw hole 2A provided in the leveler member 2.
Thus, by rotating the leveler member 2, the level foot device 10 is set so as to be entirely expandable and contractible in the vertical direction in FIGS. In the present embodiment, the adjusting screw 1 is provided with a regular hexagonal bolt head 1A at a position sandwiched between the screw portions 1B and 1C, and is integrally formed with the screw portions 1B and 1C. As shown in FIG. 2, the screw portion 1 </ b> C is attached to the bottom plate 20 of the case body 20.
A is inserted into the female screw portion 20a provided in A. At this time, when the bolt head 1A comes into contact with the bottom plate 20A, the screw portion 1
C is buried in the case body 20 by the length L1 of the screw portion 1C. By inserting a tool into the bolt head 1A or the hexagonal hole 1D and rotating the adjusting screw 1, it becomes more firmly fixed. Here, reference numeral 12 denotes the caster 11
Shows a screw for attaching to the case body 20.

Next, a description will be given of a working procedure for fixing and moving the case body 20 using the level foot device 10 of the above embodiment. First, a case where the case body 20 is transferred and fixed at a predetermined position will be described. First, an adjustment bolt 1 and a leveler member 2 having a rotatable mount portion 3 are prepared, and the screw portion 1B of the adjustment bolt 1 is screwed into the leveler member 2. At this time, the overall length of the transfer caster 1 provided on the bottom plate 20A of the case body 20 is determined from the above equation (1).
1 (that is, the distance between the bottom plate 20A of the case body 20 and the ground plane G during movement). Next, the level foot device 10 is positioned below the female screw portion 20a provided in the case main body 20, and the screw portion 1C is placed in the female screw portion 20a.
Then, the bolt head 1A is screwed until it contacts the bottom plate 20A. From this state, the bolt head 1A or the hexagonal hole 1D of the adjustment bolt 1 is rotated with a tool such as a spanner and a hexagonal wrench to perform final tightening and fix the case body 20.

Next, the leveler member 2 is rotated by a tool with respect to the adjusting bolt 1 fixed to the female screw portion 20a of the case body 20 manually or by using a two-sided width 2B.
At this time, from the relation of the expression (1), the mount portion 3 is grounded on the ground plane G, and when the leveler member 2 is further rotated from the ground state, the level foot device 10 connects the case body 20 and the ground plane G to each other. Press to mount 3 on the ground plane G
The screw portion 1B extends upward from the leveler member 2 in FIG. By this action, the casters 11 separate from the ground plane G and float, and the case body 20 is fixed by the level foot device 10 instead of the casters 11.

Next, a preparation operation for moving the case body 20 fixed as described above to another place will be described. The preparatory work for making the case main body 20 movable is the reverse of the above-described operation of fixing the case main body 20. First, in a state where the case body 20 is already fixed by the level foot device 10, the leveler member 2 is rotated to house the screw portion 1B inside the leveler member 2. In this way, the case body 20 is entirely lowered, and the casters 11 are grounded to the ground plane G. From this point, the casters 11 support the case body 20, and further rotate the leveler member 2 to provide a gap between the mount portion 3 and the ground plane G.
At this time, as shown by the one-dot chain line in FIG. 2, the mount portion 3 disposed on the leveler member 2 is separated from the ground plane G, and during the process of rotating the leveler member 2 until it hits the bolt head 1A, From the relation of the expression 2), the mounting portion 3
(L4-L) at which the leveler member 2 provided with
min) becomes larger than the length (bolt removal margin) L1 of the threaded portion 1C.
When removing C from the case body 20, the case body 2
It is possible to provide a sufficient bolt removal margin without lifting the zero. From such a state, insert a tool such as a wrench and a hexagonal wrench into the bolt head 1A or the hexagonal hole 1D of the adjustment bolt 1 and rotate it to lower the level foot device 10 as a whole by the length of the screw portion 1C, thereby reducing the case. Body 2
Remove from 0.

As described above, in this embodiment, the level foot device 10 can be easily attached and detached without lifting the case main body 20.
It is possible to reduce the difficulty of work related to fixing and moving the zero. In addition, since only the casters 11 are present on the bottom plate 20A of the case main body 20 during the movement, there is an effect that the slope range θ at which the case main body 20 can be transferred is larger than that in the related art ( (See FIG. 2). When the case body 20 is fixed at a predetermined position on the ground plane G (floor or the like) as an earthquake countermeasure (fall prevention), the female screw hole 2A of the leveler member 2 is penetrated in the length direction (vertical direction). Mounting bolt (other screw member) that can be screwed into female screw hole 2A of leveler member 2
Is embedded in the grounding surface, for example, the grounding surface G (floor or the like) and the leveler member 2 can be coupled with the mounting bolt, and the grounding surface G (floor or the like) is mounted on the leveler member 2 together with the mount portion 3. There is an effect that the case body 20 can be fixed to prevent overturning.

[0013]

As described in detail above, according to the present invention,
Since a screw fixing mechanism is provided at the center of the adjusting screw, and two screw portions are protrudingly provided on both sides of the adjusting screw, one of the screw portions is fixed to the case main body in an embedded state. Projection into the case body by this one screw portion can be minimized, and the storage space of devices such as information processing devices arranged in the case body can be fully utilized, and High-density mounting becomes possible. At the same time, since a square hole of a screw fixing mechanism for fixing the female screw portion and the screw portion of the one end by an external force is formed on an end surface of the screw portion at one end screwed with the female screw portion,
Attaching and removing operations of the adjusting screw from inside the case main body become possible. Therefore, the work of looking into the bottom plate of the case main body is eased, and the workability when attaching and detaching the case main body can be improved, and a wide range of options for attaching and detaching the level foot device are made possible. In addition, since the leveler member provided on the screw portion at the other end of the adjusting screw passes through a female screw hole screwed with the screw portion at the other end, the leveler member is opposite to the screw side of the screw portion at the other end. Can be screwed with another screw member. Therefore, the case main body can be easily fixed to the ground surface (floor or the like) as a measure against earthquake (fall prevention), and the case main body can be prevented from falling.

[Brief description of the drawings]

FIG. 1 illustrates one embodiment of the present invention.
(1) is a partially cutaway front view, and (2) is a side view of (1).

FIG. 2 shows one embodiment of the present invention, and is a partially broken front view showing a state of being mounted on a case main body.

FIG. 3 is a side view showing a conventional level foot device for a transfer case.

FIG. 4 is a partially broken front view showing a state in which a conventional transport case level foot device is attached to a case body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Adjusting screw 1A Bolt head (screw fixing mechanism) 1B Screw part 1C Screw part 1D Hexagonal hole (screw fixing mechanism) 2 Leveler member 2A Female screw hole 2C Projection 2D Depression 3 Mounting part 3A Inner edge 10 Level foot device 11 Caster 20 Case Main body 20A Bottom plate 20a Female thread part 30 Level foot 30A Pedestal 30B Male thread part G Ground plane

Claims (1)

(57) [Claims] A female screw portion is provided on a case body downward, and a screw portion at one end of an adjusting screw having screw portions formed at both ends is screwed to the female screw portion, and the female screw portion and the adjusting screw are screwed together. A screw fixing mechanism for fixing the screw portion at one end of the adjusting screw by an external force at a boundary portion between the screw portions of the adjusting screw, wherein the screw at the one end screwed with the female screw portion is provided. A square hole of a screw fixing mechanism for fixing the female screw portion and the screw portion of the one end by an external force is formed on an end face of the portion, and a screw portion of the other end of the adjusting screw has a screw portion of the other end and a screw. A leveling device for a transport case, comprising: a leveler member penetrating a mating female screw hole; and a mount portion rotatably provided on the leveler member.