JPH01299110A - Holding structure for moving heavy material - Google Patents

Abstract

PURPOSE:To enable stable installation and remove by providing a movable holding body having a member for remove at a fixed holding body fixed in the space of the lower end of a heavy article and making it possible to switch the operation/non-operation position of the member for remove in a holding structure for the heavy article having the space at the lower end of housing furniture on the linke. CONSTITUTION:The ball 57 of an operational portion 50 is embedded in the hole of a free rotary plate 55 under installed condition, gaps between the free rotary plates 55 and a holding plate 56, a driven rotary plate 54 are small, a movable holding body 30 and a member for remove is risen at a fixed holding body 20 side to be immersed in a caster. A switch which is not shown is operated to drive a motor for rotating the driven rotating plate 54 and the positional relation of the ball 57 and the free rotary plate 55 is changed to project the ball 57 from the immersed condition. Accordingly, distance between respective free rotary plates 55, respective holding plates 56, 54 is increased to and the member 50 for remove is projected to enable remove. Thus, installation and remove can be achieved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a mobile support structure for facilitating the movement of heavy objects, which has a lower end cavity open toward the installation surface. Examples of such heavy objects include storage furniture, and for example, the architrave with an open bottom surface and the portion surrounded by the bottom plate correspond to the lower end space here. Here, storage furniture broadly includes chests, cupboards, bookshelves, cabinets, lockers, etc. In addition, the above-mentioned heavy objects include a vertical piano, an upright vending machine, a decorative installation, and the like.

BACKGROUND ART Conventional techniques and their problems For example, storage furniture is often large and heavy, and once installed, it is often difficult to move it.

Some storage furniture is equipped with casters at the bottom end, but this makes the installation unstable, and if the installation surface is tatami or carpet, the casters are subject to heavy loads and the installation surface becomes unstable after long periods of installation. It is unsuitable because it deforms the In addition, ease of movement is required for other heavy items, but in many cases it is not desirable to use casters or other moving members at all times for reasons of stability and aesthetics during installation. .

In order to meet such demands, the present invention has been developed to provide a heavy object that can be stably installed by the lower end surface of the heavy object at all times, and when necessary, a moving member can be made to protrude from the lower surface of the heavy object to facilitate movement. The purpose is to provide a support structure for the movement of.

Means for Solving the Problems The object of the present invention is to provide a moving support structure that is installed at a horizontally separated position of a heavy object, the lower end of which is opened toward the installation surface, and which is nailed. a fixed support fixed within the lower end cavity of the heavy object; a movable support movable with respect to the fixed support and guided by the fixed support in a substantially vertical direction; a moving member attached to the lower surface and capable of taking a storage position in the lower end cavity and a position protruding downward from the cavity by vertical movement of the movable support; a detent mechanism that holds the movable support relative to the fixed support; a support shaft having an upper end fixed to the fixed support and a lower end fixed to the movable support and extending in the vertical direction; a support plate fixed to one of the supports; and a support plate rotatably mounted on the support shaft so as to be separated from the support plate and maintain a vertical position with respect to the other of the supports. a plurality of free rotary plates rotatably supported by the support shaft between the driven rotary plate and the support plate; a plurality of balls or rollers, each of the driven rotary plate, the support plate, and the free rotary plate having a notch portion in which the balls or rollers are partially buried and received in the holding portions of the balls or rollers; is provided, and the notch is formed so as to gradually reduce the amount of embedding of the balls or rollers as the balls or rollers move when the driven rotary plate and the free rotary plate rotate in one direction. This is achieved by a support structure for moving heavy objects, which is characterized by:

EXAMPLE Hereinafter, an example in which the present invention is applied to storage furniture will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a lower part of a wardrobe provided with a moving support device structure according to an embodiment of the present invention, viewed from below. The moving support device (10) is provided on both the left and right sides of the storage furniture, and includes a fixed support (20) fixed to the inner surface of the architrave (D), and a movable support device (20) that is guided in the vertical direction by the fixed support. A support (30), a moving member (40) attached to the lower surface of the movable support, and an actuating section (50) provided between the fixed support (20) and the movable support (30).
It is equipped with In this example, the actuating part's drive part (70)
An electric motor (71) and a transmission part (72) are provided, both of which are fixed to the inner surface of the architrave (D).

As shown in FIGS. 2 and 3, the fixed support (20) has an earthen wall (21) that has a rectangular shape in plan view and extends over almost the entire length of the inner surface of the architrave (D) in the depth direction; It has side walls (22) on both sides hanging from the earthen wall and end walls (23) at both ends, and is fixed in the architrave (D) by the end walls (23).

The movable support (30) has a rectangular shape in plan view, and has a horizontal wall (31) having a length that almost touches the inner surfaces of both end walls (23) of the fixed support, and reinforcements provided on both sides of the horizontal wall. and a side wall (32). The horizontal wall (31) is formed with a step so that the center part is lower than both ends, and the actuating part (50) is formed between the center part and the fixed support upper wall (21).
It forms a space for accommodation. Movable support (30)
In order to more reliably guide the vertical direction, a fixed support (
A part of the end wall (23> of 20) is bent perpendicularly to the inner surface of the architrave (D) as shown in the figure to form a guide piece (24), and the movable support (30) has a A matching notch (34) is provided.The moving member (40) is a swivel caster in this embodiment, and the movable support (30)
), and there are four in total. However, the moving member may be constructed as appropriate, such as by using a sliding plate with a bottom surface coated with a fluororesin or a smooth metal surface. The operating portion (50) is composed of a support shaft (51) and a rotary plate attached to the support shaft (51). Support shaft (5
In this example, 1) is in the form of a bolt, and is provided in a pair, with the upper end fixed to the earthen wall (21) of the fixed support and the lower end fixed to the horizontal wall (31) of the movable support with a nut (52). has been done. A sleeve (53) is tightly fitted onto the support shaft (51), and a circular driven rotary plate (54,) and a free rotary plate (55), which will be described below, are fitted to the sleeve (53).
and a support plate (56) are tightly and rotatably fitted. The support plate (56) is placed on the horizontal wall (31) of the movable support, and during operation is held so as not to move relative to the horizontal wall due to the frictional force between it and the horizontal wall. The support plate (56) may therefore be fixed to the sleeve (53) or formed integrally with the horizontal wall (31) from the beginning. Above the support plate (56), in this example, five freely rotating plates (55) are stacked with balls (57) interposed between each plate. A driven rotary plate (54) is located on the uppermost free rotary plate (55) with a ball (57) interposed therebetween. Further, a ball bearing (58) is interposed between the driven rotary plate (54) and the earthen wall (21) of the fixed support.
) is rotatably held in the vertical position with respect to the fixed support (20). Figure 4 shows the second
The free rotation plate attached to the left support shaft (51) in the figure is shown as seen from above, and this free rotation plate (
55), six holes are provided on the same circumference as shown in the figure. Among these holes, three holes (61
) is formed so that the diameter in the radial direction of the rotating plate gradually decreases from the largest point in the clockwise direction, and the other three holes (62) are formed so that the diameter gradually decreases in the opposite direction. It is set in. The free rotation plate (55) is
As shown in FIG. 7(a), the hole (61) of the upper rotary plate (55) and the hole (62) of the lower rotary plate (55) are arranged so that their maximum diameters match vertically. placed and the ball (
57) is held between the upper and lower rotary plates (55) with the upper and lower parts partially buried in the maximum diameter portions of these holes. FIG. 5 shows the free rotating plate (55) and ball (57) in this state as viewed from the side. As can be seen from FIG. 5, the holes (61) in one free rotating plate (55) are connected to the balls (57) located on the underside of the rotating plate.
The hole (62) serves to receive the ball (57) located on the upper side of the rotating plate. The supporting plate (56) is provided with a hole corresponding to the hole (62) in the free rotating plate (55), and the driven rotating plate (54) is provided with a hole corresponding to the hole (61). (57) is sandwiched between each plate in the same manner as described above. In this example, each free rotation plate (55) and support plate (56) have the same outer diameter (65 mm).
The driven rotary plate (54) has an outer diameter (69.6 mm) slightly larger than these, and is a worm gear with teeth on the outer periphery. The diameter of the ball (57) is 6.35 mm in this example. Each member supported by the pair of support shafts (51) in the actuating part (50) is formed to be symmetrical with respect to a plane that crosses the longitudinal direction of the moving support device (10). Therefore, the actuating part (50)
The members shown on the right side of Figure 2 are in contrast to the members shown on the left side, and the orientations of the holes (61) and (62) of the free rotation plate (55) shown in Figure 4 are the same as those shown on the right side of Figure 2. For members, the direction is reversed. The shaft of an electric motor (71) in the drive section (70) is connected to a transmission section (72).

The transmission section (72) extends a pair of drive shafts (74) toward the moving support devices (10) on both sides via a reduction gear train (73). A worm (
75) is attached, and the worm is attached to a pair of driven rotary plates (worm gears) (54) in each moving support device.
) are meshed with each other. The electric motor (71) is connected to the architrave (D
) and the limit switch (
77), it is connected to a changeover switch (78) provided on the upper surface of the bottom plate of the storage furniture. Movable support (3
0) Tension springs are provided between the side wall and the side wall of the fixed support (20) at both ends of the side wall to hold the movable support in an upper position relative to the fixed support, and to hold the movable support in an upper position relative to the fixed support and to
) and (56) are pressed together.

In the normal installation state of storage furniture, the operating part (50)
The balls (57) are inserted into the holes (61) and (6) of the free rotation plate (55) as shown in FIGS. 5 and 7(a).
2), and therefore the distance between each free rotating plate and between the free rotating plate at the upper and lower ends, the support plate (56), and the driven rotating plate (54) is kept small. The movable support (30) and the moving member (40) are in a raised position relative to the fixed support (20). That is, the storage furniture is installed with the moving member (40) recessed within the architrave (D). When moving storage furniture, the motor (71) is activated by the switch (78). As a result, the worm (75) is rotated via the transmission part (72), and the driven rotary plate (54) is accordingly rotated. This rotation is performed so that the driven rotary plate (54) on the left side of FIG. transitions from FIG. 7(a) to FIG. 7(b). Such a shift in the positional relationship between each member also occurs between each free rotation & (55) and between the free rotation plate at the lower end and the support plate (56), and each plate (54), (55), The distance between (56) increases as shown in FIG. As a result, the movable support (30) is lowered relative to the fixed support (20), and the moving member (40) projects downward from the architrave (D). This movable support (30) and the moving member (40)
The movement of the storage furniture is carried out against the overlapping of the storage furniture, but the force required for this movement is due to the driven rotary plate (5) in the actuating part (50).
4), the gradual tapering of the ball receiving holes in the free rotation plate (55) and the support plate (56), and the displacement of the ball (57) during the rotation of these plates above and below, are greatly reduced. When the movable support (30) moves a predetermined amount, the motor (71) is activated by the limit switch (77).
stops, the driven rotary plate (54) is prevented from reversing based on the engagement with the worm (75), and accordingly, the free rotary plate (55) is also held in position, and the movable support (30) and the moving The position of the member (40) is maintained. The worm (75) thus acts as a detent mechanism to hold the movable support (30) in the lowered position. After moving the storage furniture, the motor (
71) and the driven rotary plate (54) to return the distance between each plate (54), (55), and (56) to the state shown in FIG. can be raised relative to the fixed support (20) and the moving member (40) can be recessed into the architrave (D). Movable support (3o
), the motor (71) is stopped by the limit switch (77).

In the example explained above, the ball (57) receiving portions (notches) of each plate (54), (55), (56) in the actuating part (5o) are formed by holes (61), (62). However, the receiving portion may also be a groove that becomes shallower as the ball moves. In this case as well, it is most desirable that the rectangular shape of each groove in plan view is tapered as in the above example.

This corresponds to the fact that the necessary groove width decreases as the ball's impact on each plate decreases, and the ball backlash in the radial direction of the plate that occurs when the grooves are made the same width. This is to eliminate stickiness. Note that instead of this ball (57), it is also possible to use a roller that rolls in the direction of each plate layer. A groove of constant width is provided which becomes shallower in the same direction.

As in this example, the fixed support (2
0) is equipped with a support shaft (51) and plates (54), (55), and (56) attached to it in the center, one worm (75) drives a pair of driven rotary plates. The advantage is that you can. Instead of this, a pair of support shafts (51) and each plate (54), (55
), (56) can be mounted near both ends of the fixed support (20) so as to be separated from each other. In this case, the support is stabilized during operation based on the long span between the pair of support shafts, etc. This improves the stability of the storage furniture, which is advantageous in preventing the storage furniture from shaking in the depth direction.

By using a single electric motor for the drive unit (70) as in the above example, the pair of moving support devices (1
0) can be easily and reliably moved at a constant speed, but it is also possible to provide a plurality of motors to reduce the load on each motor. In this case, various types of motors may be used, such as one motor for each moving support device, one motor common to the driven rotating plates on the back side (front side) of the storage furniture, or one motor for each driven rotating plate. arrangement is possible. moreover,
The drive unit (70) includes the electric motor (
Various means can be adopted in place of one or both of the transmission section (71) and the transmission section (72), and in addition to various motors, a manual handle connected to a speed reducer can also be adopted.

This manual handle may, for example, project upwardly from the bottom plate of the storage furniture, and is preferably removable. The driven rotating plate (54) is driven by a worm (
75), various gears, belt motors, etc. can be adopted as appropriate. If it is not possible to prevent the driven gear (54) from rotating as when using a worm, a detent mechanism is employed in the lowered position of the movable support (30). This detent mechanism may include a locking portion that protrudes from the movable support (30) so as to lock the movable support (30) from outside the storage furniture, or a locking portion that releases the lock from the outside of the storage furniture. Various means such as a ratchet mechanism can be employed.

In the above example, the support plate (56) was provided to be fixed to the movable support (30), but instead of this, the support plate (56)
6) is provided on the upper part of the support shaft (51), and the fixed support body (20
), in which case the driven rotary plate (54) is provided at the lower part of the support shaft (51),
The vertical position is maintained by interposing a ball bearing or the like between the movable support and the horizontal wall (31). Furthermore, when using a freely rotating plate having holes (60) and (62) in the same direction as in the previous example, the rotating direction of the driven rotating plate is opposite to that in the previous example. Furthermore, in this case, since the driven rotary plate supported by the movable support moves up and down relative to the fixed support and the actuating part supported by this, the transmission part is one that allows this up and down movement (for example, a universal joint). Int, etc.) must be adopted.

The present invention can be applied to other storage furniture and other heavy objects having a lower end space in the same way as the wardrobe example.

In the moving support structure according to the present invention, the support structure portion can be assembled separately from the heavy object and attached to the heavy object, or a part of the lower end of the heavy object can be used as a fixed support. It is also possible to integrate i and Fl into the heavy object.

Effects of the Invention As is clear from the above description, the present invention can provide a support structure for moving heavy objects that has the following effects. That is, since a moving member is provided in a space at the lower end of a heavy object so that it can be stored in the space and in a position protruding downward from the space, the moving member is normally stored in the space. The heavy object can be stably installed on any installation surface, and when moving, the moving member can be projected downward to easily move the heavy object.

The protrusion of the moving member is obtained by rotating the driven rotary plate, and in this case, the driven rotary plate, the free rotary plate, and the support plate disposed between the fixed support and the movable support, as well as their Due to the action of the balls or rollers sandwiched between them, the force required for its operation is extremely reduced.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, and FIG. 1 is a perspective view of the lower part of a storage furniture equipped with a pair of moving support devices and their drive unit, viewed from below, and FIG. Fig. 3 is a cross-sectional view of the main part of the moving support device; Fig. 4 is a cross-sectional view thereof;
The figure is a plan view of the free rotating plate in the moving support device, the fifth
and FIG. 6 are side views showing the states of the free rotation plate and the ball corresponding to the retracted state and the protruded state of the moving member, respectively;
FIG. 7 is a perspective view of the main parts of the free rotation plate and the ball corresponding to FIGS. 5 and 6. FIG. (10)...Moving support device (20)...Fixed support (30)...Movable support (40)...Moving member ( 50)... Actuation part (51)... Support shaft (54)... Driven rotating plate (55)... Free rotating plate (56). ... Support plate (57) ... Ball (58) ... Ball bearing (61), (62) ... Hole (70) ... Drive section (that's all)

Claims (1)

[Claims] (1) A support structure for moving a heavy object having a lower end space open toward the installation surface, which is installed at a horizontally separated position of the heavy object, and fixed within the lower end space of the heavy object. a fixed support that is movable relative to the fixed support and guided by the fixed support in a substantially vertical direction; a movable member capable of taking a stored position in the lower end cavity and a position protruding downward from the cavity; and holding the movable support relative to the fixed support in the protruding position of the movable member. a detent mechanism; a support shaft whose upper end is fixed to the fixed support and whose lower end is fixed to the movable support and extends in the vertical direction; and a support fixed to one of the supports on the support shaft. a plate; a driven rotary plate rotatably mounted on the support shaft so as to be separated from the support plate and maintain a vertical position with respect to the other of the supports; and the driven rotation plate. a plurality of freely rotating plates rotatably supported by the support shaft between the plate and the support plate; a plurality of balls or rollers held between the driven rotating plate, the support plate and the free rotating plate, respectively; The ball or roller clamping portions of the driven rotary plate, the support plate, and the free rotary plate are provided with notches in which the balls or rollers are partially buried and received, respectively;
The notch is formed so that the amount of embedding of the balls or rollers gradually decreases as the balls or rollers move when the driven rotary plate and the free rotary plate rotate in one direction. Support structure for moving heavy objects.