JPH0232101Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a mobile rack device.

Generally, this type of rack device is provided with an endless track having a circular arc portion and a straight portion extending tangentially to the circular arc portion, and a plurality of racks each having two wheels running on the track are attached to the track. It is arranged so that it can be moved.

Conventionally, in order to move the rack along the track, a pair of driving pins are provided at both ends of the lower surface of the rack, as seen in Japanese Patent Publication No. 51-26707, for example, while a pair of drive pins are provided at both ends of the lower surface of the rack, and at the curved part in the track, A guide wheel comprising a plurality of sets of two drive arms that can be engaged with the drive pin is attached, and each set of drive arms is sequentially engaged with the drive pin by rotation of the guide wheel to move the rack. You can see things like that.

However, in the above-mentioned apparatus, not only the structure is complicated, but also the width of the rack is restricted by the dimension between the drive arms, so it is very difficult to freely set the width of the rack.

Therefore, as schematically shown in FIG. 6, the applicant provided a pair of sprockets C in a raceway A with a diameter smaller than the arc portion B of the raceway A, and stretched a chain D between these sprockets. On the other hand, a rack device was developed in which the chain D was hooked to a pivot member F fixed to the lower surface of the rack E (Utility Application 1986-
150454), but with the above structure,
Since the hooking point of the chain D on the rack E does not change, the chain D is fixed as shown in FIG.
A phenomenon occurs in which the rack is pulled outward by the rack E located in the straight part G of the track A, and as the rack approaches the arc part B from the straight part G of the track A, the tension of the chain increases. As a result, the moving speed of the rack E is not constant, and stable running of the rack as a whole cannot be expected, and the sprocket of the drive device installed in the track cannot be accurately aligned concentrically with the arc of the track. It is necessary to install the vehicle at a certain angle, which requires time and effort, and if the installation position is even slightly off, problems arise such as the inability to run stably and easily.

The present invention was devised in view of these circumstances, and the purpose is to provide a mobile rack device that has a simple structure and can always run stably.

Accordingly, the present invention provides an endless track having a circular arc portion and a straight portion extending in the tangential direction of the circular arc portion, and moves a plurality of racks equipped with two wheels running on this track onto the track. A movable rack apparatus arranged such that the drive means includes a pair of sprockets and a chain stretched between the sprockets, the chain being connected to each of the racks. is characterized in that the racks are slidably connected at a predetermined interval in a direction perpendicular to the traveling direction of the rack.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The mobile rack device according to the present invention will be explained below based on the embodiment shown in the drawings.

In the figure, reference numeral 1 denotes an endless track having a semicircular arc portion 1a, 1a and a straight line portion 1b, 1b extending in the tangential direction so as to connect the arc portions 1a, 1a, and having a substantially oval planar shape. , 2 is the same arc part 2
This is an endless guide rail that is formed in the same shape as the endless track 1 and includes linear parts 2b and 2b, and these guide rails 2 and the endless track 1 are arranged vertically to face each other.

3, 3... are the guide rail 2 and the endless track 1.
These racks 3, 3 are interposed between
... are provided with two wheels 4, 4 that run on the track 1 on the lower surface, and two guide wheels 5, 5 that rotate along the guide rail 2 are provided on the upper surface,
These wheels 4, 4 and guide wheels 5, 5 allow the racks 3, 3, . . . to move along the track 1 and the guide rail 2.

Further, A is a drive device for the racks 3, 3, .
A pair of sprockets 6a, 6 with a smaller diameter than a.
A gear reducer 63 is provided with a drive sprocket 61 attached to one of the sprockets 6a and driven by the drive sprocket 61 and a motor 62. and endless chain 64
The motor 62 is driven to rotate the chain 7 via the sprockets 6a and 6b.

Accordingly, in the present invention, the chain 7 is connected to each of the racks 3, 3, .

That is, in the embodiment shown in the figure, each of the racks 3, 3
A bracket 31 is fixed to the lower surface of the vehicle and at an intermediate position between both wheels 4, 4, and a connecting plate 3 extending above the chain 7 is attached to this bracket 31.
2 is fixed with bolts 33, 33, and this connecting plate 32
A long hole 34 extending in a direction perpendicular to the running direction of the racks 3, 3, . . . is bored in the racks.

On the other hand, the inner ends of an arbitrary pair of outer link plates 71, 71 constituting the chain 7 are extended inward, and a through hole 72,
73 are provided facing each other. And the long hole 34
The flange 81 that engages with the open end of the elongated hole 34
A stepped connecting shaft 8 having a shaft portion 82 for sliding is formed, and this connecting shaft 8 is inserted into the long hole 34 of the connecting plate 32 or the through hole 72 of the extension pieces 71a, 71a, as shown in FIG. 73 and screwing a nut 80 onto the insertion end thereof, the chain 7 is attached to each of the racks 3, 3, . The connection was made so that the interval could be slid freely.

In the figure, 74, 74... are inner link plates forming the chain 7, and 75... are the inner link plates 74 and the outer link plates 71.
A pin 83 connecting the two indicates a collar inserted into the connecting shaft 8.

The present invention has the above configuration, and the motor 6
2, the chain 7 of the drive device A rotates via the sprockets 6a, 6b, and accordingly, the racks 3, 3, . . . connected to the chain 7 also move along the track 1. It is.

Since the chain 7 connected to the racks 3, 3, . The shaft part 82 of
However, the long hole 3 of the connecting plate 32 fixed on the rack 3 side
4, so even if the rack 3 is slidable in the arc section 1a of the track 1 and the straight section 1b of the track 1.
Even if the relative positions of the chains 7 and It doesn't feel like it's being pulled outwards.

Therefore, the racks 3, 3... are connected to the chain 7.
Through this, the vehicle can travel stably on the track 1 at a constant speed.

As described above, according to the present invention, a drive device including a pair of sprockets and a chain stretched between these sprockets is provided in the track, and the chain is connected to each rack so that the chain runs smoothly. Since the racks are slidably connected at a predetermined interval in a direction perpendicular to the direction, the distance between the track and the connection point of the chain in each rack is always constant regardless of the running position of the rack, and therefore the rack is It runs smoothly on the track at a constant speed, and is expected to provide stable operation overall.
Further, according to the present invention, even if the sprocket of the drive device installed in the raceway is not accurately arranged concentrically with the circular arc portion of the raceway, in other words, even if the mounting position of the sprocket with respect to the raceway is slightly deviated, the rack can be fixed. In addition, it has become possible to adjust the tension of the chain by arbitrarily changing the mounting position of the sprocket, for example.

[Brief explanation of the drawing]

FIG. 1 is a schematic front view showing a mobile rack device according to the present invention with some parts omitted, FIG. 2 is a schematic bottom view, and FIG. 3 is a plan view showing an enlarged main part.
4 is a sectional view taken along the line of FIG. 3, FIG. 5 is an explanatory diagram of the operation of the mobile rack device according to the present invention, and FIG. 6 is an explanatory diagram of the operation of the conventional device. 1...Endless track, 3...Rack, 4...Wheel,
6a, 6b... Sprocket, 7... Chain.

Claims (1)

[Scope of utility model registration request] A mobile type comprising an endless track having a circular arc part and a straight part extending tangentially to the circular arc part, and a plurality of racks equipped with two wheels that run on the track movably arranged on the track. The rack device is provided with a drive device having a pair of sprockets and a chain stretched between the sprockets in the track, and the chain is attached to each of the racks in the running direction of the rack. A movable rack device characterized in that it is slidably connected at a predetermined interval in orthogonal directions.