JP2564498B2 - Item management tray type lifting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention is an article management tray type elevating and lowering apparatus which is used as a storage rack for articles and which selects a tray containing a desired article and moves it to a take-out position. The present invention relates to an apparatus, and more particularly, to an article management tray type lifting apparatus having a tray lifting support mechanism suitable as a tray type lifting apparatus for high-weight articles such as molds / jigs, machine parts, and electrical parts.

[Prior Art] As a tray type elevator for loading and unloading conventional articles, as shown in FIG. 5, a drive sprocket 2 and a sprocket (not shown) on which a roller chain 1 is vertically suspended are arranged, and a tray 3 is mounted on the roller chain 1. A cam follower 4 is provided on the tip of an arm 3a which is arranged and held and extends upward from the tray 3.
Is provided and the cam follower 4 is mounted on a guide rail 5 arranged along the roller chain 1 so as to be movably guided, and the drive sprocket 2 moves up and down through the roller chain 1, as shown in FIG. Arm of tray 3 on roller chain 1 suspended on sprocket 2
It is known that the tip of 3a is held and drooped, and the tray 3 is raised and lowered by driving the drive sprocket 2.

[Problems to be Solved by the Invention] However, in any of the conventional tray-type elevators, the tray is shaken at the time of vertical rotation and at the time of vertical movement, and in particular, at the top dead center,
In the rotating part of the bottom dead center, the tray may shake strongly and the tray may reach the reverse hanging state 3A (Fig. 5). It is almost impossible to prevent this. In this conventional tray type elevator, the tray moves at low speed. There was a problem that it was difficult to increase the speed because it was raised and lowered at (for example, about 15 to 20 cm per second).

In view of such conventional circumstances, the present inventor has invented an article management tray type lifting device capable of preventing lateral shake and increasing the speed and performing article management, and has previously proposed it. 62-196206).

As shown in FIG. 3 and FIG. 4, the proposed device suspends a roller chain 19 on a pair of sprockets 12 and 13 arranged above and below the machine frame 11, and
Is connected to a drive motor 21 which is controlled by a signal from a computer, further provided with a pair of auxiliary sprockets 24 and 25 that are vertically offset in parallel with the sprockets 12 and 13, and an auxiliary roller chain 29 is hung on this. The arm 28 fixed vertically to the tray support shaft 27a of the tray 27 supported by the roller chain 19 is locked to the auxiliary roller chain 29,
The tray 27 is supported by two points so that the tray 27 can be kept in a vertical state.

Therefore, according to the proposed device, the tray 27 is always hung down and moved in the locked state by the roller chain 19 and the auxiliary roller chain 29, so that the shake is eliminated and the speed can be increased (for example, up to about 1 m / sec). You can move the desired tray 27 to the take-out position by the signal,
Workability can be promoted. However, if the target article is a high-weight article such as molds / jigs, machine parts, and electrical parts, and the tray 27 is a heavy-load type tray, the tray support shaft
27a requires considerable rigidity, and its shaft diameter inevitably becomes large, so that the support structure of the support shaft 27a by the roller chain 19 becomes complicated and heavy, and in addition, the elevating path of the tray 27 is long. However, there were still some issues to be solved, such as the fact that maintenance problems increased as a result.

The present invention has been made in view of the above circumstances, and an object thereof is to easily cope with an increase in the diameter of a tray support shaft, and the structure of a tray lifting / lowering support mechanism is simple, lightweight, and has few maintenance problems. It is to provide a management tray type lifting device.

[Means for Solving the Problems] According to the present invention, the roller chain is hung on a pair of sprockets arranged above and below the machine frame, and
One sprocket is connected to a drive motor controlled by a computer signal, and an auxiliary roller chain is hung on a pair of auxiliary sprockets arranged vertically offset in parallel with the sprocket, and a tray supported on the roller chain. In the article management tray type lifting device in which an arm extending upward from the support shaft is locked by the auxiliary roller chain, and the tray is supported at two points to maintain the vertical state, a link and a link are provided on the roller chain. An offset link that axially supports the support shaft is interposed at a position deviated from the center line of the connecting pin to the outside, and a vertical guide that guides the inside of the roller chain is provided.

Further, according to the present invention, the auxiliary roller chain has a rod-shaped member which is inserted into the concave groove at the tip of the front page arm and locked at a position deviated from the center line of the pin connecting the links to each other. An offset link is interposed.

[Operation] With such a configuration, the tray support shaft is supported by the offset link interposed in the roller chain, so that the tray support shaft is enlarged by the distance displaced to the outside of the offset link. The diameter can be easily made. Moreover, since the tray support shaft, which is the load point of the offset link, is axially supported at a position displaced outward from the center line of the pin connecting the adjacent links of the roller chain, the offset link is caused by the heavy load of the tray. Since it rotates inward, the chain link can be securely held only by the vertical guides placed inside it, and the structure of the tray lifting support mechanism is simple and lightweight, there are few maintenance problems, and the heavy load type The device is suitable as a high-speed tray type lifting device. Further, the auxiliary roller chain also has an offset link having a rod-shaped member which is inserted and locked in a concave groove at the tip of the arm extending upward from the tray support shaft, and the vertical offset of the tray is adjusted by adjusting the offset amount. The state is maintained more reliably.

The above-mentioned configuration of the present invention and the saliency of its operation will be more clearly understood from the following description.

As described above, in the conventional tray-type lifting device, the tray is laterally shaken when rotating and moving up and down.
There is no preventive measure in the rotating part of the bottom dead center, and in the worst case, the reverse drooping state is reached. In order to hold the roller chain in the vertical conveying portion that moves up and down, vertical guides are usually provided outside and inside the roller chain. Therefore, the structure of the tray elevating and lowering support mechanism is complicated by these outer and inner vertical guides and the mounting / supporting members such as brackets for fixing these vertical guides to the machine frame, and in addition to this, the tray elevating path is long. There are also many maintenance problems. If the diameter of the tray support shaft is further added to this, the structure of the tray elevating and lowering mechanism becomes more complicated, but in the present invention, the tray support shaft is an offset link connected to the roller chain. Since it is supported, it is possible to easily cope with an increase in the diameter of the tray support shaft. Moreover, the tray support shaft, which is the load point of the offset link, is pivotally supported at a position deviated from the center line of the roller chain to the outside, and the heavy load on the tray causes the offset link to rotate inward. Can be securely held only by the vertical guide arranged inside. Therefore, the vertical guide only needs to hold the inside of the roller chain, and there is no need to provide the outside vertical guide, so the structure of the tray lifting support mechanism is simple and lightweight, there are few maintenance problems, and the heavy load type high speed It becomes a device suitable for a mold tray type lifting device.

In addition, it is sufficient to provide the vertical guide inside the roller chain as described above, and the vertical guide for the outer member and the mounting / supporting member such as the bracket for fixing the vertical guide to the inner vertical guide or the machine frame can be omitted. By effectively utilizing the space of this portion, for example, the tray-type lifting device is double-rowed, and a known hawk-type tray is used to store stored articles (for example, rod-shaped articles) from one tray of the lifting device to the other lifting device. Applications such as transferring to trays are also possible.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

In FIG. 3 and FIG. 4, 11 is a machine frame, and a pair of sprockets 12 and 13 is arranged on the machine frame 11 in the vertical direction. The upper sprockets 12 and 12 are main shafts pivotally supported by the machine frame 11. The lower sprockets 13 and 13 are fixed to a support frame 16 having guide rods 16a and 16a guided by vertical guide holes 15a and 15a of a guide plate 15 attached to the machine frame 11. It is supported by the shafts 17, 17. Further, the support frame 16 has a shaft 26 supported by stretcher units 18, 18 provided outside the machine frame 11, and via the shaft 26, roller chains 19, 19 suspended between the sprockets 12, 13 are supported. I always give tension to them.

A sprocket 20 is fixed to one end of the upper spindle 14, and the sprocket 20 is connected to a drive motor 21 linked to a control board C controlled by a signal of a computer via a sprocket 22 and a roller chain 23, and is rotated by the drive motor 21. It is supposed to be done. Also, the upper and lower sprockets
Auxiliary sprockets 24 and 25 are arranged vertically in parallel with 12 and 13. One of the upper auxiliary sprockets 24 is the machine frame 11
On the other hand, the lower auxiliary sprocket 25 is supported on a shaft 26 from the supporting frame 16. A tray support shaft 27a, which is arranged at an appropriate interval, is pivotally supported on each roller chain 19, 19 between the sprockets 12, 13. One end of an arm 28 is fixed to the end of the tray support shaft 27a, and the other end of the arm 28 is connected to the auxiliary sprocket 2 in a manner described later.
It is locked by an auxiliary roller chain 29 suspended between 4 and 25,
The tray 27 is supported by the arm 28 in a locked state and always in a vertical state. Reference numeral 30 is an adjusting screw shaft for adjusting the stretcher unit 18. The above-mentioned configuration is the same as that of the proposed device.

Therefore, according to the present invention, as shown in FIGS. 1 and 2, the roller chain 19 is provided with an offset link 31 for pivotally supporting the tray support shaft 27a at a position displaced to the outside of the center line described above. A vertical guide 33 that guides the inside of the roller chain 19 is provided. Further, an offset link 34 for interlocking the arm 28 as described later is interposed in the auxiliary roller chain 29 at a position displaced to the outside of the above-mentioned center line. Reference numeral 32 is a collar having a shaft diameter of the tray support shaft 27a and an equivalent hole diameter. Further, the arm 28 is
The recessed groove 28a at the tip end is locked by being fitted into the rod-shaped member 34a inserted into the offset link 34. The vertical guide 33 has a length extending from the vicinity of the upper sprocket 12 to the vicinity of the lower sprocket 13 and is provided inside the roller chain 19.

 Next, the operation of this embodiment will be described.

First of all, articles such as machine parts are stored in the respective trays 27 suspended vertically in the machine frame 11, and after storing them in the computer, in order to select the desired articles stored in the respective trays 27, When the drive motor 21 is driven through the control panel C by the selection signal from the computer, the desired article stored in the tray 27 is moved to the take-out position and can be easily taken out or stored. In this case, the tray 27 accommodating the articles is always hung vertically by the two chains 19 and 29 in a locked state, has no lateral shake, and is stably held even at high speed movement, so that work can be performed efficiently. The above operation is the same as in the case of the proposed device.

In the present invention, however, since the tray support shaft 27a is pivotally supported by the offset link 31 at a position deviated outward from the center line of the pin connecting the adjacent links of the roller chain, the weight of the tray 27 is reduced. The load causes the offset link 31 to rotate inward (in the direction of the arrow) and is securely held by the vertical guide 33.
The lifting guide is smoothly performed. Further, the arm 28 fixed vertically to the shaft 27a from the tray 27 is also provided with the auxiliary roller chain 2
Since it is locked by the same offset link 34 connected to 9, the vertical state of the tray 27 by the two-point support is well maintained.

EFFECTS OF THE INVENTION As is clear from the above description, the article management tray type lifting device of the present invention can easily cope with an increase in the diameter of the tray support shaft, and the tray lifting support mechanism has a simple and lightweight structure. It is possible to obtain a device suitable for a heavy load type high speed tray type lifting device with few problems in maintenance. Further, by interposing an offset link for locking an arm vertically fixed to the tray support shaft in the auxiliary roller chain and adjusting the offset amount, the vertical state of the tray can be more reliably maintained.

[Brief description of drawings]

FIG. 1 is a front view showing a main part of an embodiment of the present invention, FIG. 2 is a side sectional view of FIG. 1, and FIG. 3 is a front view of the article management tray type lifting device proposed previously. FIG. 5 is a side view of a main part of FIG. 3, FIG. 5 is a side view of a conventional tray type elevator, and FIG. 6 is a side view of another conventional tray type elevator. 11 …… machine frame, 12,13 …… sprocket, 19 …… roller chain, 21 …… drive motor, 24,25 …… auxiliary sprocket, 27 …… tray, 27a …… tray support shaft, 29 …… auxiliary roller Chain, 31, 34 …… Offset link, 33 ……
Vertical guide

Claims (2)

(57) [Claims] 1. A roller chain is hung on a pair of sprockets arranged on the upper and lower sides of a machine frame, and one of the sprockets is connected to a drive motor controlled by a computer signal and vertically offset in parallel with the sprockets. A pair of auxiliary sprockets are hooked on an auxiliary roller chain, and an arm extending upward from the support shaft of the tray pivotally supported by the roller chain is locked by the auxiliary roller chain to support the tray at two points. In an article management tray-type lifting device for maintaining the vertical state by an offset link that pivotally supports the support shaft at a position deviated outward from the center line of a pin connecting the link to the roller chain. And a vertical guide that guides the inside of the roller chain. Management tray type lifting device. 2. An offset link having a rod-shaped member which is inserted into and locked in a concave groove at the tip of the arm at a position displaced outward from the center line of a pin connecting the link to the auxiliary roller chain. The article management tray type lifting device according to claim 1, characterized in that it is interposed.