JPH0318409Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a power transmission unit for a manually operated movable shelf that transmits the manual force for rotating a handle to running wheels so that the shelf can be moved on rails.

[Conventional technology]

Traditionally, manual moving shelves have been well known.
Most of these drive systems transmit the rotational force of human power, which is transmitted to the steering wheel, to the running wheels through a transmission mechanism using a chain and sprocket.

[Problem that the invention attempts to solve]

Therefore, in conventional manual moving shelves, the load applied to the handle is approximately uniform, or the load is made as small as possible depending on the size of the shelf body, that is, the capacity or allowable load. In order to move a heavy shelf with a light rotational force of a handle, the transmission mechanism is often configured to have a different reduction ratio (power increase ratio) depending on the specifications of the shelf.

Therefore, at the manufacturing stage of the manually operated movable shelf, it is necessary to manufacture and stock two or more types of transmission mechanism parts.

In addition, this type of mobile shelf requires so-called on-site construction such as laying rails at the installation location, and the main body of the mobile shelf is quite large in the assembled state. Because it is assembled on-site using the knock-down method, two parts are added to the above-mentioned transmission mechanism.
Coupled with the fact that there are more types of parts, there is also the problem that storage and management of parts tends to become complicated.

[Means for solving problems]

In view of the above-mentioned problems with manually operated movable shelves, the present invention unifies the transmission mechanism for the rotational force transmitted to the handle regardless of the capacity or allowable load of the shelf body in manually operated movable shelves. , the transmission mechanism itself is a pre-assembled unit structure,
The purpose of this product is to provide a power transmission unit for a manually operated movable shelf that contributes to streamlining parts management and speeding up assembly.Its configuration consists of a frame of a trolley equipped with running wheels, with the necessary supports erected. established,
On the side of the shelf body, which is formed by mounting the top plate, horizontal beams, etc. on this support and attaching the necessary shelf boards, there is a handle that can be rotated by hand, a drive sprocket attached to this handle shaft, and a drive sprocket attached to this sprocket. In a transmission mechanism for a manual movable shelf, the transmission mechanism includes a transmission mechanism in which rotational force is transmitted through a chain that is hung around, and a driven sprocket for transmitting the rotational force to the running wheels of the trolley. The handle shaft and the drive sprocket attached thereto are attached to a mounting board formed to fit within the side surface of the shelf main body having the smallest side width, and the drive sprocket is mounted approximately halfway in the height direction of this board. A chain tensioner consisting of two slider pieces that support both sides of the chain wound around the sprocket from the inside of the loop is provided at a slight inclination from a horizontal position, and the slider pieces are provided so as to be freely positionable in the direction of inclination of the tensioner. This transmission mechanism is characterized in that it is manufactured and stored for each mounting board.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

Figures 1 and 2 are side views of examples of when the power transmission unit of the present invention is installed on shelves with double side widths (Figure 1) and single widths (Figure 2). be.

In the figure, 1 is a trolley with running wheels (not shown), 2 is a support installed on this trolley 1, the double-width model has three pillars 2 erected on the side, and the single-width model has three supports 2 erected on the side. There are two erected.

Reference numeral 3 denotes a horizontal crosspiece mounted horizontally at the middle of each support column 2 in the height direction, and its shape is as shown in FIG. It consists of mounting sides 3b for supporting columns 2 and 2 extending in the direction, and functions as a mounting portion for a mounting board 4 of a power transmission unit, which will be described later. 31a is a mounting hole of the mounting board 4, and 31b is a mounting hole for the support column.

Although not shown, the shelf main body L is formed from the members 1 to 3 described above, as well as other supports, a top plate, other horizontal bars, a removable shelf board, and the like.

4 is a mounting board for the power transmission unit of the present invention;
Here, the top side and both sides are raised towards the front, and the standing wall 4
a, 4b. In addition, the entire height of this board 4 is such that the lower end of the board 4 is at the side frame 1 of the trolley 1.
It is placed in contact with the upper surface of a, and at this time, the upper end is adjusted to the inside of the horizontal side 3c of the horizontal crosspiece 3, and its front width is as shown in Fig. 2, and the side width is small. It is sized to fit between the two pillars 2, 2 of the shelf main body L. The upper part of the board 4 is fixed to the horizontal beam 3 by bolts 4c, and the lower end is attached to the mounting piece 1b vertically provided on the side frame 1a of the trolley 1 at the lower end of the vertical wall 4b. It is fixed by a bolt 4d.

Reference numeral 5 denotes a drive sprocket attached to a shaft 5a integral with the shaft of a handle (not shown) on the mounting board 4, and this sprocket 5 is pivotally supported by a bearing member 5b attached to the board 4. 5c is a mounting bolt for the bearing member 5b.

Reference numeral 6 denotes a chain whose upper side is wound around the sprocket 5, and whose lower side is wound around a driven sprocket 7 attached to the outer surface of the side frame 1a of the truck 1 via a chain tensioner 8, which will be described later.

The structure of the tensioner 8 is as follows.

The tensioner 8 has a horizontally long plate shape, and the upper and lower sides in the middle of the longitudinal direction are formed into guide parts by standing walls 81a, and the outer ends thereof are fixed with screws 82a with a small horizontal angle to the mounting board 4. base 8a
and two slider members 8b, each having a slider piece 81b made of a material with a small coefficient of friction such as nylon on the outside, and whose fixed position is variable in a substantially horizontal direction by an adjustment screw 83b inserted into the space 8a through a horizontally long hole 82b. It is formed from.

However, the slider member 8 of the tensioner 8
b and 8b are positioned inside the loop drawn by the chain 6 that is wound around both the driving and driven sprockets 5 and 7, and their positions are adjusted by screws 83b to act to extend the chain 6 outward. .

Here, the reason why the slight horizontal angle (approximately 3 degrees in this case) is attached to the mounting of the tensioner 8 is that the power transmission unit of the present invention has a double-sized shelf main body (first
This is so that it can be used for both the single size (Fig. 2) and single size (Fig. 2) shelf bodies.

That is, in a double-sized shelf, a support 2 is provided at the center of the side frame on the base side 1 (see FIG. 1), so the driven sprocket 7 is located avoiding this support 2. For this reason, the drive sprocket 5
This is to accommodate the fact that the line connecting the center of the driven sprocket and the center of the driven sprocket 7 is not perpendicular. Incidentally,
In such a case, if the tensioner 8 is installed in a horizontal position, the slider piece 8 of the tensioner 8
The length of the chain 6 is different between the sprocket 5 side (upper half side) and the sprocket 7 side (lower half side), centering on the part that contacts 1b, and when this is on the tension side, it acts on this chain 6. This is inconvenient because the tension is different between the upper and lower halves.

Reference numeral 9 denotes a locking device of the transmission mechanism, which includes a locking rod 9a that protrudes and retracts from below the sprocket in the valley of the teeth located on the lower side of the drive sprocket 5, an operating lever 9b of the rod 9a, and the like. This device 9 has a mounting plate 9c fixed to the base plate 4 with screws 9d at four locations, forming a part of the power transmission unit of the present invention. In addition, 9e is a rod holder that guides and supports the rod, 9f is a spring, and 9g is a connecting link that connects the lever 9b and the rod 9a.

[Functions and effects of the invention]

The power transmission unit of the manual movable shelf according to the present invention can be stored and transported as a part of the unit structure with the drive sprocket 5, chain tensioner 8, and locking device 9 attached to the mounting board 4 in advance. Not only are these convenient for transportation and storage, but a single unit can be used as a transmission mechanism regardless of the capacity of the shelf body, which greatly contributes to streamlining the on-site assembly of manually operated movable shelves. It is. In addition, the transmission unit of the present invention can be used for double-sized shelf bodies and single-sized shelf bodies without any modifications, so it is possible to manufacture and stock a large number of transmission units in advance, and the manufacturing cost can be reduced. It can be made inexpensive.

As described above, the power transmission unit of the present invention is extremely useful as a transmission mechanism for manually operated movable shelves.

[Brief explanation of the drawing]

FIG. 1 is a side view of the essential parts of a manual movable shelf to which an example of the power transmission unit of the present invention is attached, FIG. 2 is a side view of another example, and FIG. 3 is a perspective view of the horizontal rail. 4...Mounting board, 5...Drive sprocket, 6
...Chain, 7...Driver sprocket, 8...
Chain induction, 9...locking device.

Claims (1)

[Scope of utility model registration request] The necessary supports are erected on the frame of the trolley equipped with running wheels, the top plate, horizontal bars, etc. are attached to these supports, and the necessary shelf boards are attached to the sides of the shelf body. A power transmission system consisting of a handle attached to the handle shaft, a drive sprocket attached to the handle shaft, and a driven sprocket for transmitting rotational force to the running wheels of the bogie by transmitting rotational force through a chain that is wound around the sprocket. In the transmission mechanism of a manual movable shelf, the above-mentioned handle shaft and the drive sprocket attached thereto are formed in a size such that the handle shaft and the drive sprocket attached thereto can fit within the side surface of the shelf main body having the smallest side width. At the same time, a chain tensioner consisting of two slider pieces that supports both sides of the chain that is wound around the drive sprocket from the inside of the loop is provided approximately in the height direction of this board at a slight inclination from the horizontal position. A power transmission unit for a manual movable shelf, characterized in that the slider piece is provided so as to be freely positionable in the direction of inclination of the tensioner, and the transmission mechanism is manufactured and stored for each mounting board.