JP5083664B2 - Panel tilt device - Google Patents

Description

  The present invention relates to a panel tilt device that tilts a panel being transported in a transfer press or an inter-press transport device.

In a transfer press or a transfer apparatus between presses, a panel holding tool that holds a panel and a crossbar that hangs the panel holding tool and moves between presses are used to transfer the panel being formed. A panel is also called a workpiece.
Such panel grippers and cross bars are disclosed in, for example, Patent Documents 1 and 2.

  As shown in FIG. 3, in Patent Document 1, a pair of lift beams 53 are arranged in the press body 51 so as to face each other with a mold sandwiched in the workpiece conveyance direction. The lift beam 53 is movable up and down by an AC servo motor 54 attached to the upright 52 and a lifting rod 55. Furthermore, the lift beam 53 includes a cross bar 50 provided with work gripping tools 59 arranged at intervals of the mold arrangement and perpendicular to the work transport direction, and rails provided on both sides of the lift beam 53 holding the cross bar 50. A feed beam 58 having a portion 56 and a plurality of travelable cam followers 57 traveling between the upper and lower surfaces of the rail portion 56 is suspended so as to be movable in the workpiece transfer direction.

As shown in FIG. 4, in Patent Document 2, the transfer feeder 60 includes a pair of lift bars 61 that are parallel to the workpiece conveyance direction and supported by the upright 64, and are horizontally mounted between the pair of lift bars 61. A plurality of cross bars 62 supported so as to be movable along the cross bar 62 and a vacuum cup device 63 that is attached to the cross bar 62 and holds the workpiece W.
The lift bar 61 is attached to a lift device fixed to the side surface of the upright 64. By driving the lift device with a servo motor or the like, the entire lift bar 61 and the cross bar 62 move up and down. Yes.

Japanese Patent Laid-Open No. 11-309532, “Transfer Press Work Transfer Drive Device” Japanese Patent Application Laid-Open No. 2004-223606, “Work receiving device between presses or between slides of a transfer press”

  In the above-described conventional transfer press and inter-press transfer device, a panel tilt device that tilts (tilts) a panel being transferred in a plane orthogonal to the crossbar may be provided.

5A and 5B are schematic diagrams of a conventional panel tilt device, where FIG. 5A shows before tilting and FIG. 5B shows after tilting.
In this figure, 1 is a panel being molded, 1a is the center of gravity of the panel, 2 is a crossbar, and 3 is a panel gripping tool. In this example, the panel 1 has a deep drawing shape in which the central portion swells upward.
In the conventional panel tilt apparatus, in order to avoid interference with the panel, the tilt center 4 of the cross bar is provided at a position coaxial with or higher than the cross bar 2.
Therefore, the conventional panel tilt apparatus has a relatively large distance L (hereinafter referred to as “center of gravity distance”) between the panel gravity center 1a and the tilt center 4 of the crossbar, and has the following problems.

(1) Since the tilt bar height of the crossbar is high and the center of gravity distance L is large, if the panel 1 is tilted at a certain angle (tilt angle θ), the horizontal movement amount (= Lsin θ) of the panel increases, and the center of gravity position or In order to maintain the panel position, a horizontal shift operation is required.
(2) Since the center-of-gravity distance L is large, a load (moment of inertia = MαL) due to acceleration / deceleration (acceleration α) when the panel is moved horizontally (feed) is large.
(3) Since the center-of-gravity distance L is large, a large driving torque (= MgLsin θ) is required even if the panel weight M is the same.

  The present invention has been developed to solve the above-described problems. That is, the object of the present invention is that even if the panel is tilted, the amount of horizontal movement of the panel is small and a horizontal shift operation is almost unnecessary, and the load (moment of inertia) due to acceleration / deceleration when moving the panel horizontally (feed) is small. An object of the present invention is to provide a panel tilt device capable of tilting a panel having the same weight with a driving torque significantly smaller than that of the conventional panel.

According to the present invention, there is provided a panel tilt device that suspends a panel below an elongated crossbar and tilts the panel in a plane perpendicular to the axis of the crossbar,
A slider to which a crossbar having a panel gripper that is positioned above the panel and grips the panel is fixed;
A base member fixed to a moving member that moves up and down and / or horizontally in the conveying direction and guides the slider so as to be tiltable around a tilt center positioned below the upper end of the panel in the plane;
There is provided a panel tilt device comprising: a tilt drive device fixed to the base member and tilting a slider around the tilt center.

  According to a preferred embodiment of the present invention, an arc guide is provided between the slider and the base member and guides the slider so as to be tiltable around the tilt center.

  Further, the tilt drive device includes a pneumatic cylinder that drives a slider in a circumferential direction centered on the tilt center, a linear servo cylinder, a rack and pinion that drives a pinion with a servo motor, or a part of a worm gear and a worm wheel. It is.

  According to the above configuration of the present invention, the base member fixed to the moving member that moves up and down and / or horizontally in the transport direction is located above the panel, and the slider to which the crossbar having the panel gripping tool is fixed. Since the slider is guided to be tiltable around the tilt center located below the upper end of the panel in the plane, the distance L ′ (center of gravity distance) between the panel center of gravity and the center of tilt is greatly reduced compared to the conventional case. it can.

Therefore, the centroid distance L ′ is significantly smaller than the centroid distance L (L ′ << L).
Even if the panel (work) is tilted, the amount of horizontal movement of the panel (= L'sin θ) is small and almost no horizontal shift operation is required, and the load due to acceleration / deceleration during horizontal movement (feed) of the panel (moment of inertia = MαL) It is possible to tilt a panel having a small ') and the same weight with a driving torque (= MgL'sinθ) significantly smaller than that of the conventional panel.

In addition, the drive torque (= MgL'sinθ) required for tilt is significantly smaller than before, and the distance R between the tilt center and the drive position (hereinafter referred to as “drive distance”) can be significantly greater than before, so tilting is possible. The required thrust of the drive device can be greatly reduced, and the required speed can be greatly reduced.
Therefore, as a tilt drive device, a pneumatic cylinder, a linear motion servo cylinder, or a rack and pinion that drives a pinion with a servo motor can be used, and the tilt drive device is smaller than a conventional motor with a speed reducer. And low cost.

  Furthermore, the problem can be solved with a mechanism having a small vertical dimension by using an arc guide. That is, there is an effect that another adverse effect such as an increase in the size of the press machine and a reduction in production speed is avoided in order to avoid interference.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the common part in each figure, and the overlapping description is abbreviate | omitted.

1A and 1B are schematic views of a panel tilt apparatus according to the present invention. FIG. 1A shows a state before tilting, and FIG. 1B shows a state after tilting.
The panel tilt device 10 of the present invention is a device that suspends the panel 1 below the elongated crossbar 2 and tilts the panel 1 in a plane perpendicular to the axis of the crossbar 2.
1A, a panel tilt device 10 of the present invention includes a slider 12, a base member 14, and a tilt drive device 16 (not shown: see FIG. 2).

A cross bar 2 having a panel gripping tool 3 that is positioned above the panel 1 and grips the panel 1 is fixed to the slider 12. For example, a vacuum cup device that holds the panel 1 is attached to the lower end of the panel gripping tool 3.
The base member 14 is fixed to the lower surface of the moving member 20 that moves up and down and / or horizontally in the transport direction, and the tilt center 11 is positioned below the upper end of the panel in the plane perpendicular to the axis of the crossbar 2. Guide to be able to tilt around.

  Note that the moving member 20 that moves up and down and / or horizontally in the transport direction is, for example, the feed beam 58 of Patent Document 1 or the lift bar 61 of Patent Document 2. In the present invention, the moving member 20 is not limited to a feed beam or a lift bar, and may be any other member (for example, an intermediate support member of a new type of transport device) as long as it moves up and down and / or horizontally in the transport direction. May be.

  The tilt drive device 16 (not shown: see FIG. 2) is fixed to the base member 14 and tilts the slider 12 around the tilt center 11.

FIG. 2 is an overall configuration diagram of a panel tilt apparatus according to the present invention. In this figure, (A) shows an example of both-end support, and (B) shows an example of intermediate support.
As shown in these drawings, the panel tilt device 10 of the present invention can be supported at both ends of a crossbar in a conventional transfer press, or can be intermediately supported as in a new type of transfer device.

  2A and 2B, reference numeral 3 denotes a panel gripper, and the upper end portion is fixed to the crossbar 2. The slider 12 is integrally fixed to the upper portion of the panel gripping tool 3 via the crossbar 2 and the tool connecting portion 13 so that the tilting (tilt) of the slider 12 becomes the movement of the panel gripping tool 3 as it is. Yes. The tool connecting portion 13 is preferably detachable.

  The base member 14 is a flat plate-like member fixed to the lower surface of a moving member 20 (not shown) that moves up and down and / or moves horizontally in the transport direction, and moves together with the moving member 20. The fixed position is not limited to the lower surface of the moving member 20, and may be the side surface thereof.

In this example, the tilt drive device 16 is a pneumatic cylinder in which the cylinder side is rotatably fixed to the base member 14 and the rod side is rotatably fixed to the base member 14.
The tilt drive device 16 is not limited to a pneumatic cylinder, and may be a linear servo cylinder, a rack and pinion that drives a pinion with a servo motor, or a worm gear and a worm as long as the slider 12 can tilt around the tilt center 11. It may be part of the wheel.
In particular, when position control of the tilt angle is required, it is preferable to use a direct acting servo cylinder or an NC motor driven pinion.

The panel tilt device 10 of the present invention includes an arc guide 18 between the slider 12 and the base member 14.
The arc guide 18 is held between a fixed side arc rail 18a fixed to the base member 14, a moving side arc rail 18b fixed to the slider 12, and a fixed side arc rail 18a and a moving side arc rail 18b. It consists of a cross roller (not shown), and guides the slider 12 so that it can tilt around a tilt center 11 (not shown: see FIG. 1).
The arc guide 18 is not limited to this example, and other guides such as a V roller and a V rail, a cam follower and an arc rail, a bearing type arc as long as the slider 12 can be tiltably guided around the tilt center 11. It may be a guide or the like.

  According to the configuration of the present invention described above, as shown in FIG. 1 (A), the slider 12 to which the crossbar having the panel gripping tool 3 is fixed is positioned above the panel 1 and moves up and down in the transport direction. Since the base member 14 fixed to the moving member 20 that moves horizontally or the slider 12 guides the slider 12 in a tiltable manner around the tilt center 11 positioned below the upper end of the panel in a plane perpendicular to the axis of the crossbar, The distance L ′ (center of gravity distance) between the panel center of gravity 1a and the tilt center 11 can be greatly reduced as compared with the conventional case.

Accordingly, since the center of gravity distance L ′ is significantly smaller than the conventional center of gravity distance L (L ′ << L), as shown in FIG. 1B, the panel 1 is tilted (tilt angle: θ). The horizontal movement amount (= L′ sin θ) is small and a horizontal shift operation is almost unnecessary.
Further, a load (moment of inertia = MαL ′) due to acceleration / deceleration (acceleration: α) when the panel 1 is moved horizontally (feed) is small, and a driving torque (much smaller than before) for the panel 1 having the same weight Mg. = MgL′sin θ).

In addition, the drive torque (= MgL'sinθ) required for tilt is significantly smaller than before, and the distance R between the tilt center and the drive position (hereinafter referred to as “drive distance”) can be significantly greater than before, so tilting is possible. The required thrust of the drive device 16 can be greatly reduced, and the required speed can be greatly reduced.
Accordingly, as the tilt drive device 16, a pneumatic cylinder, a linear servo cylinder, or a rack and pinion that drives a pinion with a servo motor can be used. Compared with a conventional motor with a speed reducer, the tilt drive device is The size can be reduced and the cost can be reduced.

  In addition, this invention is not limited to embodiment mentioned above, Of course, a various change can be added in the range which does not deviate from the summary of this invention.

It is a schematic diagram of the panel tilt apparatus by this invention. 1 is an overall configuration diagram of a panel tilt device according to the present invention. It is a figure which shows the workpiece holding tool and crossbar of patent document 1. FIG. It is a figure which shows the workpiece holding tool and crossbar of patent document 2. FIG. It is a schematic diagram of the conventional panel tilt apparatus.

Explanation of symbols

1 panel, 1a panel center of gravity, 2 crossbar,
3 Panel gripper, 4 Tilt center of crossbar,
10 panel tilt device, 11 tilt center,
12 Slider, 13 Tool connecting part, 14 Base member,
16 tilt drive, 18 arc guide,
18a fixed side arc rail, 18b moving side arc rail,
20 Moving member

Claims (3)

A panel tilt device that suspends a panel below an elongated crossbar and tilts the panel in a plane perpendicular to the axis of the crossbar,
A slider to which a crossbar having a panel gripper that is positioned above the panel and grips the panel is fixed;
A base member fixed to a moving member that moves up and down and / or horizontally in the conveying direction and guides the slider so as to be tiltable around a tilt center positioned below the upper end of the panel in the plane;
A panel tilt device comprising: a tilt drive device fixed to the base member and tilting a slider around the tilt center.   2. The panel tilt device according to claim 1, further comprising an arc guide that is positioned between the slider and a base member and guides the slider to be tiltable about the tilt center.   The tilt drive device is a pneumatic cylinder, a linear motion servo cylinder, a rack and a pinion that drive a pinion with a servo motor, or a part of a worm gear and a worm wheel that drives a slider in a circumferential direction around the tilt center. The panel tilt device according to claim 1.

Images