JPS6211861Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for pushing objects on a main conveyance line to branch conveyance lines.

This type of device includes a movable stopper that stops the transported object on the main transport line at a position where it is pushed out to the branch transport line, and a pushing means that pushes the transported object stopped by this stopper to the branch transport line. However, by linking the forward/retracting movement of the stopper with the pushing-out operation of the pushing-out means, the structure of the drive system becomes simpler than when the two are driven at particular timing, and the structure of the drive system is simpler. The conveyed object can be stopped and pushed out in a timely manner.

As a conventional device of this kind, for example,
As in the apparatus described in Japanese Patent No. 31570, a right-angle conveyor is used instead of the extrusion means, which has the drawback of a very complicated structure and high equipment cost. It is conceivable to use a rotating arm-type pushing means instead of this right-angle conveyor, but since the conventional movable stopper was installed at the bottom of the conveyance path, it would be necessary to install it above the conveyance path. The interlocking means with the rotary arm type extrusion means has a complicated structure, and the equipment cost is also high.

The present invention proposes a conveyed object pushing out and branching device capable of solving such problems, and its feature is that the extruding means is installed above the main conveying line in parallel to the conveying direction. It is composed of a rotary arm rotated by a rotary shaft and a pusher provided at the tip of the rotary arm, and the movable stopper is configured with a stopper main body provided at a position below the rotary shaft so as to be movable up and down. The stopper body includes a spring that biases and holds the stopper body at the upper limit non-operating position, and the stopper body is provided with a cam that is pushed down by a stopper drive arm that is rotated by the rotation shaft, and the stopper drive arm and the cam push down the stopper body to the lower limit action position before the pusher contacts the conveyed object, and maintain the stopper body at the lower limit operation position while the pusher is in the process of pushing out the conveyed object. The point is that it is configured to allow

In such a device of the present invention, by rotating the rotary shaft just before the conveyed object to be branched reaches the pushing position, the stopper drive arm moves the stopper body against the spring to reach the upper limit. The object is pushed down from the operating position to the lower limit operating position, and after the object comes into contact with the stopper main body pushed down to the lower limit operating position, the end pusher of the rotary arm pushes the object to the branch conveyance line. During the action of pushing out the conveyed object by the pusher, the stopper main body is maintained at the lower limit action position.

One embodiment will be described below based on the attached illustrative drawings. In FIGS. 1 and 2, 1 is a main conveyance line consisting of a tray conveyor, 2 is a branch conveyance line consisting of a roller conveyor, and 3 is a main conveyance line 1.
6 is an opening/closing device that selectively stops the transported object 5 pushed out by the extrusion means 3 from moving forward on the main transport line 1. A flexible stopper 7 is an interlocking means for interlocking the extrusion means 3 and the stopper 6. The extrusion means 3
A pair of rotary arms 9a and 9b are fixed to a rotary shaft 8 located above the main conveyance line 1 and parallel to the conveyance direction of the line 1, and a pair of left and right pusher rollers are respectively pivotally supported at the tips of these rotary arms. The rotating shaft 8 is supported by a frame 11 at both ends with bearings 12, and is operatively connected to a motor 13 installed on the frame 11 via a gear 14 and a chain 15.

The stopper 6 is attached to a support shaft 16 on the frame 11.
between the free end of the stopper body 17 and the frame 11 to hold the stopper body 17 in a non-operating position where it abuts the upper limit stopper bolt 18. It consists of a tension coil spring 19 interposed in the
The interlocking means 7 consists of a cam 20 formed on the upper side of the stopper main body 17, and a pair of stopper drive arms 21a, 21b that act on the cam 20.
1b is an arm body 22 fixed to the rotating shaft 8;
a, 22b, and rollers 23a, 23b pivotally supported at the free end of the arm body. The cam 20 consists of a first step surface 24a and a second arcuate surface 24b following the first step surface 24a, and this arcuate surface 24b is
When the stopper main body 17 is in the operating position as shown by the imaginary line in FIG. 3, the stopper drive arm 21
This coincides with the outer periphery of the rotation locus of the rollers 23a and 23b at a and 21b.

Next, the method of use and operation will be explained. As shown in FIG.
When it is detected, for example, by a detector consisting of a floodlight 25 and a phototube 26 shown in FIG. and rotate it within a range of 180 degrees counterclockwise as shown in Figure 3. As a result, the stopper drive arm 21a, which had been stopped in the state shown in FIG. Push down to the working position shown by the imaginary line. Therefore, the object 5 to be transported comes into contact with the side surface of the stopper body 17 and is stopped on the main transport line 1. Immediately after this, the rotating arm 9 which was being rotated counterclockwise by the rotating shaft 8
The pusher roller 10a of A comes into contact with the side surface of the object 5 to be conveyed, and this pusher roller 10a pushes the object 5 onto the branch conveyance line 2. During this pushing action, the roller 23a of the stopper drive arm 21a rotates along the second arcuate surface 24b of the cam 20 and holds the stopper main body 17 in the operating position, so that the conveyed object 5 to be pushed out is transferred to the stopper. While being guided by the side surface of the main body 17, it moves onto the branch conveyance line 2 without disturbing its posture.

When the pushing and branching of the conveyed object 5 is completed, the roller 23a of the stopper drive arm 21a comes off the second arcuate surface 24b of the cam 20, and the stopper main body 17 is moved upward by the spring 19 and hits the upper limit stopper bolt 18. It is held in the upper inactive position where it touches. Then, the rotating arm 9a and the stopper driving arm 21a complete the 180 degree rotation, and a series of actions is performed in a state where the positions of the rotating arm 9a and the rotating arm 9b, and the stopper driving arm 21a and the stopper driving arm 21b have been exchanged. Complete. The next push-out branching action is therefore performed by the pusher roller 10b of the rotary arm 9b and the stopper drive arm 21b.

If the spring 19 deteriorates or breaks, the stopper main body 17 will remain lowered, making it impossible to selectively branch the conveyed object. Therefore, as shown in FIG. 1, a detector (for example, a proximity switch, a limit switch, etc.) 27 is provided to detect the stopper main body 17 in the upper limit non-acting position, and the rotating shaft 8
When there is no detection signal from the detector 27 when the tray conveyor 27 is not being driven, the tray conveyor of the main conveyance line 1 can be configured to actuate an alarm as an abnormality or to stop the tray conveyor of the main conveyance line 1. Further, in the above embodiment, pusher rollers 10a and 10b were used as pushers provided at the ends of rotating arms 9a and 9b, but other suitable pushers may be used depending on the object to be transported.

The device of the present invention can be implemented as described above, and the movable stopper and the push-out means can be driven in a timely manner by a single rotary shaft. The extrusion means is of a rotary arm type that is rotated by a single rotating shaft, and this is disposed above the conveyance path, and a stopper that can move in and out is also disposed above the conveyance path. By means of an extremely simple interlocking means consisting of a stopper drive arm rotated by a shaft and a cam provided on the stopper body, it has become possible to interlock the two. Therefore, the number of parts of the entire device is small, the structure is simple, and it can be implemented at low cost.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a front view, FIG. 2 is a side view, FIG. 3 is an enlarged front view of the main part, and FIG. 4 is a plan view of the same. 1... Main transport line, 2... Branch transport line,
3... Extrusion means, 5... Object to be transported, 6... Openable/closable stopper, 7... Interlocking means, 9a, 9b
... Rotating arm, 10a, 10b ... Pusher roller, 17 ... Stopper body, 19 ... Tension coil spring, 20 ... Cam, 21a, 21b ...
Stopper drive arm.

Claims (1)

[Scope of utility model registration request] The branching device includes a movable stopper that stops the transported object on the main transport line at a position where it is pushed out to the branch transport line, and a pushing means that pushes out the transported object stopped by the stopper to the branch transport line. The extrusion means is composed of a rotary arm rotated by a rotary shaft installed parallel to the conveyance direction above the main conveyance line, and a pusher provided at the tip of the rotary arm. A retractable stopper,
The stopper body is constructed of a stopper body which is provided at a position lower than the rotation shaft so as to be freely raised and lowered, and a spring which biases and holds the stopper body in the upper limit non-operating position, and the stopper body is rotated by the rotation shaft. The stopper driving arm and the cam push down the stopper body to the lower limit action position before the pusher contacts the object to be transported, and A conveyed object pushing and branching device configured to maintain a stopper main body at a lower limit action position while in a process of pushing out an object.