JPH08119440A - Pantograph type pusher device - Google Patents

Abstract

PURPOSE: To prevent the natural expansion and contraction of a pantograph at the time of no use by offsetting the moment generated by the own weight of upper and lower pantographs, with the force applied to a rotor. CONSTITUTION: When a rotor 92 is driven, the torque rotates a rotor 90 through a crankshaft 94 and a coupling shaft 95. At this time, the end 62 of the upper pantograph 50 and the end 82 of the lower pantograph 70 coupled with both ends of the rotor 90 shift in the direction where they come close to or separate from each other, guiding the rollers 59 and 79 and the guide rails 57 and 77. At the same time, on both pantographs 50 and 70 work the moment by the own weight, centering upon the axes 58 and 78 of each end 61 and 82. Therefore, the upper pantograph 50 tries to push down the roller 59 of the lower link 54, trying to shrink. On the other hand, the lower pantograph 70 tries to pull up the roller 79 of the upper link 73, trying to expand. Therefore, to the rotor 90 the force generated from the moment by the own weight of the pantographs 50 and 70 is applied, and they are canceled with each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pusher device for pressing and moving an article.

[0002]

2. Description of the Related Art Conventionally, as an example of a pusher device, there is a piston type pusher device disclosed in Japanese Utility Model Laid-Open No. 1-91866. As shown in FIG. 5, this pusher device has a moving body 14 guided by a guide sleeve 12 fixed to a frame 11 of a horizontal rotary shelf 10 and horizontally reciprocated by a chain 13. By reciprocating, the articles W can be simultaneously pushed out from each shelf 16 of the horizontal rotary shelf 10 to the transfer device 19 (see FIG. 6).

The moving body 14 of the pusher device 15 has a length longer than the distance (push stroke) for pushing out the article W. On the other hand, the horizontal carousel 10 (see FIG. 6) is formed in an oval shape when seen in a plan view.

However, in such a piston type pusher device 15, even if an attempt is made to make the linear portion 17 of the horizontal rotary shelf 10 orthogonal to the linear portion 17, the shelves 32 including the shelves 16 move in a circular circulation. Since the length of the pusher device 15 is longer than the width dimension C of the dead space D generated as a result, it cannot be provided. For this reason, as shown in FIG. 6, the piston type pusher device 15 is provided in the horizontal rotary shelf 1.
There is a problem in that it can be provided only in the corner portion 18 in parallel with the straight line portion 17 of 0 and the installation place is limited.

As a pusher device for solving such a problem, there is a pantograph type pusher device 20 shown in FIG. The pusher device 20 has a pair of pantographs 21 and 31 which are vertically separated from each other, and a stretching operation mechanism 22 of each pantograph.

A pair of pantographs 21, which are vertically separated from each other,
31 is one link 2 that constitutes each pantograph
The upper mounting base ends 24, 34 of the 3, 3 are provided on the mounting frame 25 so as to be rotatable and vertically movable.
The lower mounting base ends 27, 37 of the other links 26, 36 intersecting the 3, 33 are provided rotatably only on the frame 25, and the respective pantographs 21, 31 have a structure capable of expanding and contracting in the front-back direction in the vertical plane. Has become. The expansion / contraction operation mechanism 22 includes a connecting link 29 that connects the lever rods 28 and 38 fixed to the lower mounting base ends 27 and 37, respectively, and a crank driving means 30 that swings and swivels one lever rod 38 in the vertical direction. It is configured.

The pusher device 20 is provided with a pair of upper and lower pantographs 21 by the crank driving means 30.
31 extends forward and pushes the article from the shelf to move the article. Therefore, the pusher device 20 can be reduced when not in use and can be housed within the width dimension C of the dead space D of the horizontal rotary shelf 10, so that the pusher device 20 can be provided in the linear portion 17 and the installation place is restricted. There is no such thing.

[0008]

However, such a pantograph type pusher device 20 has the following problems. The own weight of each of the pair of upper and lower pantographs 21 and 31 is W, and the respective center of gravity positions G and G and the links 26 and 36.
If the distances from the lower mounting base ends 27 and 37 of L are L and L, the moments W and L act on the pantographs 21 and 31 about the lower mounting base ends 27 and 37 of the links 26 and 36, respectively. The rotation moment in the direction of arrow B always acts on the base ends 27 and 37.

Therefore, such a pantograph type pusher device 20 is used when the pantograph 2 is not used.
There is a problem that the urging force that naturally stretches forward in the direction of 1, 31 is generated.

[0010]

SUMMARY OF THE INVENTION According to the present invention, the upper mounting base end of one of the cross links constituting the upper pantograph is rotatably provided on a mounting frame, and the lower mounting base end of the other link is mounted on the frame. An upper mounting base end of one link of a cross link that is rotatably and vertically movable and constitutes a lower pantograph separated from an upper pantograph is rotatably and vertically moveable on the frame, and a lower mounting base end of the other link. Is rotatably provided on the frame, and the pair of spaced apart upper and lower pantographs are attached so as to be extendable in the front-rear direction in a vertical plane, and are respectively attached to free ends of respective intersecting links of the upper and lower pantographs. One end is provided at the lower mounting base end of the provided article pushing piece and the other link of the upper pantograph. By means of a pantograph-type pusher device having a pantograph-reducing biasing rotor provided on the frame so as to be rotatable in a vertical plane about an intermediate portion, which is connected to the upper end of one link at the upper end of each link. Solved the problem.

[0011]

When the rotating body is rotated, the lower mounting base end of the upper pantograph and the upper mounting base end of the lower pantograph connected to both ends of the rotating body move toward each other or away from each other. To do. When the base ends move in the direction away from each other, the upper and lower pantographs extend to press and move the article. When moving toward each other, the upper and lower pantographs shrink.

Now, the moment of the pantograph acting on both ends of the rotating body will be described with reference to FIG. 3, for example.
First, if the weights of the upper and lower pantographs are W, the distance between the upper mounting base end of the upper pantograph and the position of the center of gravity is L, and the distance between the lower mounting base end of the lower pantograph and the position of the center of gravity is L, both In each of the pantographs, the moments of W and L act around the respective base ends.

Due to this moment, the upper pantograph tries to push down the lower base end of the upper pantograph in an attempt to contract by receiving a counterclockwise rotational force about the upper base end of the upper pantograph. On the other hand, the lower pantograph tries to pull down the upper mounting base end while trying to extend by receiving a counterclockwise rotational force about the lower mounting base end of the lower pantograph.

Therefore, a downward force is applied to both ends of the rotating body, and the moments generated by the weights of the upper and lower pantographs are canceled out. If the upper pantograph does not shrink naturally, The side pantograph does not grow naturally. Further, the offsetting of the moments allows the pusher device to have a driving force that substantially presses the work.

[0015]

Embodiments of the present invention will be described below with reference to FIGS. The pantograph type pusher device 40 is
A straight line portion of the horizontal rotary shelf 41 (for example, the straight line portion 1 in FIG. 6).
7) is installed in a direction orthogonal to the straight line portion, and is housed in a dead space (for example, dead space D in FIG. 6). The pusher device 40 is a device that simultaneously pushes out articles (not shown) from each shelf 42 of the horizontal rotary shelf 41 to a transfer device or a transfer device (not shown).

The horizontal rotary shelf 41 (see FIG. 1) comprises a plurality of shelves 43 which are connected endlessly in the circulating movement direction (front and back direction of paper). The shelf 43 is provided with a plurality of shelves 42, and can be circulated on an elliptical loop rail 44. The shelves 42 are the article pushing pieces 5 described later.
Both walls of the shelf 43 (not shown) as 5 passes across
Instead of being provided so as to pass over, it is provided in a cantilevered manner from both walls in the front-back direction of the paper surface of FIG.
Therefore, the articles are stored so as to be passed over the shelves 42 projecting from both walls.

The pusher device 40 comprises an upper pantograph 50, a lower pantograph 70, a rotating body 90, a drive motor 92 and the like. The upper pantograph 50 and the lower pantograph 70 have the same structure, and are provided vertically with respect to a horizontal line (not shown) passing through a rotation center axis 91 of a rotating body 90 described later.

The upper pantograph 50 has four links 51, 52, 53, which are rotatably connected to each other in an X shape.
An article pushing piece 55 for pushing the article is provided at the free end (the left end side in FIG. 1). 51, 52 of a pair of links connected to the article pushing piece 55
The tip of the upper link 51 is rotatably connected to the article pushing piece 55 by a pin 64, and the tip of the lower link 52 is rotatably and vertically movable to the article pushing piece 55 by a roller 56 and a guide rail 57. Has been done.

The end portion 61 of the upper link 53, which is the base end of the upper pantograph 50 to be mounted on the upper side (on the right end side in FIG. 1).
Is rotatably provided on the frame 45 by a shaft 58. The frame 45 is a frame of the horizontal rotary shelf 41. Also, the end portion 62 of the lower link 54, which is the base end of the lower attachment,
Is the frame 4 by the roller 59 and the guide rail 60.
5 is provided so as to be rotatable and vertically movable. Therefore, the upper pantograph 50 is capable of expanding and contracting in the front-rear direction (left-right direction in FIG. 1).

The lower pantograph 70 also has four links 71, 72, 73, which are rotatably connected to each other in an X shape.
An article pushing piece 75 for pushing out an article is provided at the free end (the left end side in FIG. 1). Of the pair of links 71, 72 connected to the article pushing piece 75, the tip of the upper link 71 is rotatably connected to the article pushing piece 75 by a pin 84, and the tip of the lower link 72 is a roller 76 and a guide rail. 77 is connected to the article pushing piece 75 so as to be rotatable and vertically movable.

The end 81 of the upper link 73, which is the base end of the upper side of the lower pantograph 70 (on the right end side in FIG. 1).
By the roller 79 and the guide rail 80.
5 is provided so as to be rotatable and vertically movable. Further, the end portion 82 of the lower link 74, which is the lower mounting base end, is rotatably provided on the frame 45 by the shaft 78. Therefore,
This lower pantograph 70 is also expandable / contractible in the front-back direction (left-right direction in FIG. 1).

The rotating body 90 is provided in an intermediate portion between the end 62 of the lower link 54 of the lower mounting base of the upper pantograph 50 and the end 81 of the upper link 73 of the upper mounting base of the lower pantograph 70. Provided on the frame 45 so as to be rotatable on a vertical plane about the rotation center axis 91,
The ends 62 of the lower link 54 and the upper link 7 are provided at both ends.
The end portion 81 of the No. 3 is rotatably connected by the connecting links 63 and 83. The rotating body 90 is a link, but may be a disc (not shown).

The drive motor 92 is fixed to the bottom of the frame 45 with the drive shaft 93 parallel to the linear portion of the horizontal rotary shelf 41 (for example, the linear portion 17 in FIG. 6). The drive motor 92 is a drive motor with a speed reducer. A crank plate 94 is attached to the drive shaft 93 of the drive motor 92. One end of the crank plate 94 is rotatably connected to the rotating body 90 via a connecting shaft 95.

The drive motor 92 may be directly attached to the rotation center shaft 91 of the rotating body 90. In this case, the rotating body 90 and the rotation center shaft 91 must be integrated. As described above, when the drive motor 92 is directly attached to the rotation center shaft 91, the crank plate 94 and the connecting shaft 95 are unnecessary, and the structure of the pusher device 40 can be simplified.

Next, the operation will be described. When the drive motor 92 is driven, the rotational force is transmitted to the rotating body 90 via the crank plate 94 and the connecting shaft 95, and the rotating body 90 rotates. When the rotating body 90 rotates, the end portion 62 of the lower link 54 of the upper pantograph 50 and the end portion 81 of the upper link 73 of the lower pantograph 70 connected to both ends of the rotating body 90 cause the rollers 59, 79 and the guide rails. 57 and 77 are used as guides to move toward each other or away from each other.

When the end portions 62 and 81 move in the direction away from each other, as shown in FIG. 3, the upper and lower pantographs 50 and 70 extend and enter the tray 42 (see FIG. 1). The article on the shelf 42 is pressed and moved. When moving toward each other, the upper and lower pantographs 50 and 70 shrink as shown in FIG.
It fits in the dead space of the horizontal rotary shelf and permits the circular movement of the shelf 43 of the horizontal rotary shelf 41.

Now, the moments of the upper and lower pantographs 50 and 70 acting on both ends of the rotating body 90 will be described with reference to FIG. First, the upper and lower pantograph 5
The weight of 0 and 70 is W, the distance between the shaft 58 of the upper link 53 of the upper mounting base end of the upper pantograph 50 and the position of the center of gravity G is L, and the shaft 78 of the lower link 74 of the lower mounting base end of the lower pantograph 70. If the distance between the position of the center of gravity G and the position of the center of gravity G is also L,
Both pantographs 50 and 70 have respective end portions 61 and 82.
The moments of W and L act around the axes 58 and 78 of.

Due to this moment, the upper pantograph 50 causes the upper link 53 of the upper pantograph 50 to have the axis 5 of the upper link 53.
The roller 59 of the lower link 54 is pushed down in an attempt to contract by receiving a counterclockwise rotational force centering on 8.
On the other hand, the lower pantograph 70 is the lower pantograph 70.
The roller 79 of the upper link 73 tries to extend by receiving a counterclockwise rotational force about the shaft 78 of the lower link 74.
Try to lower.

Therefore, in FIG. 3, a counterclockwise moment about the rotation center axis 91 is applied to the left end of the rotary body 90, and a clockwise moment is applied to the right end.
The moments generated by the weight of the upper and lower pantographs 50 and 70 are offset. Therefore, unless the upper pantograph 50 shrinks naturally, the lower pantograph 70 does not naturally stretch.
Further, the offsetting of the moments allows the pusher device 40 to have a driving force that substantially pushes out the work.

[0030]

In the pusher device of the present invention, the article is pressed and moved by the expandable and contractible pantograph that is reduced in the unused state and extended in the used state. The effect that it can be incorporated in a desired position in a narrow dead space inside is exhibited. Further, in the pusher device of the present invention, the lower mounting base end of the upper pantograph and the upper mounting base end of the lower pantograph are connected to both ends of the rotating body, and the moment generated by the own weight of the upper and lower pantographs is applied to the rotating body. Since it acts as a downward force on both ends to cancel each other, the pantograph does not naturally expand and contract when not in use. Further, the pusher device of the present invention has an effect that it is easy to control the force for pushing out the article because the moment is not applied to the rotating body.

[Brief description of drawings]

FIG. 1 is a front view of a pantograph-type pusher device according to an embodiment of the present invention.

FIG. 2 is a right side view of FIG.

FIG. 3 is a front view of the pusher device of FIG. 1 in an extended state.

FIG. 4 is a front view of the pusher device of FIG. 2 in a contracted state.

5 is a front view of a conventional piston type pusher device, which is a view taken in the direction of arrows 5-5 in FIG.

6 is a schematic plan view of a horizontal carousel in which the pusher device of FIG. 5 is incorporated.

FIG. 7 is a front view of a conventional pantograph-type pusher device.

[Explanation of symbols]

40 Pusher device 45 Frame 50
Upper pantograph 55 Article pushing piece 61 Upper pantograph upper mounting base end 62 Upper pantograph lower mounting base end 70
Lower pantograph 81 Upper base end of lower pantograph 75
Article pushing piece 82 Lower base end of bottom pantograph 90
Rotating body

Claims (1)

[Claims] 1. A pantograph mounting frame is provided with a pair of upper and lower pantographs, which are spaced apart from each other, and intersecting link base ends of the pair of pantographs are extendable in a front-back direction in a vertical plane, and an upper mounting base end of the upper pantograph is rotatable on the frame. Mounting, a lower mounting base end is mounted on the frame so as to be rotatable and vertically movable, and an upper mounting base end of the lower pantograph is mounted on the frame so as to be rotatable and vertically movable,
A lower mounting base end is rotatably attached to the frame, an article pushing piece is provided at each of the link free ends of the upper and lower pantographs, and one end is provided at a lower mounting base end of the other link of the upper pantograph. A pantograph characterized by having a rotating body which is connected to the upper mounting base end of the one link of the lower pantograph and has the other end connected thereto, and which is rotatably provided on the frame in a vertical plane about an intermediate portion. Pusher device.