JP2514856Y2 - Hanger switchgear - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of use) The present invention relates to a hanger opening / closing device for opening and closing a releasable hanger that lifts and conveys a work.

(Prior Art) Relatively large workpieces such as automobile bodies are hoisted by hangers and transported on the production line for assembly, which facilitates attachment / detachment of workpieces as the production line is automated. Therefore, various hanger opening / closing devices for automatically opening / closing the hanger have been proposed (for example, disclosed in Japanese Patent Laid-Open No. 56-65790).

This hanger opening / closing device has a relatively simple structure and is of a type in which a hanger arm which is openable and closable left and right is opened and closed by a drive source such as a cylinder.

For example, in Japanese Unexamined Patent Publication No. 56-61210, a push plate is provided on a side extension arm for connecting a rotatable hanger arm provided to each of a pair of hangers arranged in the front and rear of the moving direction. There is disclosed a hanger opening / closing device that opens and closes a hanger arm by pressing the with a plunger of an air cylinder.

Further, as shown in FIG. 3, a rotatable hanger arm 2 provided on each of a pair of hangers (only one of the hangers is shown) 1 arranged at the front and rear of the moving direction is provided with a connecting rod 3 for opening and closing. And a receiving member 5 whose one end is rotatably supported by a supporting member 4 provided on the side of the hanger 1 is rotated by the operation of a cylinder 6 to rotate the connecting rod 3
There is a hanger opening / closing device 7 that opens and closes the hanger arm 2 by pushing up.

(Problems to be solved by the invention) By the way, in recent years, in order to improve productivity, mixed production in which different works are simultaneously assembled in the same production line is performed. However, when the hangers with different widths are used to convey works with different widths on the manufacturing line, the following problems occur when trying to share the hanger opening / closing device.

In the hanger opening / closing device disclosed in JP-A-56-61210, since the width of the hanger differs depending on the width of the work and the position of the push plate also differs, when the hanger arm is expanded by pushing with the same air cylinder. If the opening (opening) of the hanger arm is different, the workpiece cannot be clamped if the opening is small, or conversely if the opening is large, the tip of the hanger arm is the production line. There was a problem that it hits each assembling device or pillar on both sides of the.

Further, in the hanger opening / closing device 7 shown in FIG. 3, the connecting rod 3 is rotated by the rotation of the receiving tool 5 supported by the supporting member 4.
When the two kinds of hanger arms 2 and 2a shown by the solid line and the broken line in FIG. 3 are expanded, the receiving member 5 abuts the connecting rod 3 located outside. At this time (state indicated by a chain double-dashed line in the figure), the component force in the direction of the rotation center A of the hanger arm 2 applied to the connecting rod 3 becomes large, so that the connecting rod 3 may be deformed or the opening / closing operation may be defective. There was a problem. Further, even in this device, as shown in FIG. 4, the openings of the hanger arms 2 and 2a are different, so that the same problem as the hanger opening / closing device disclosed in Japanese Patent Laid-Open No. 56-61210 occurs.

The present invention has been made in view of the above problems, and an object thereof is to provide a hanger opening / closing device capable of smoothly opening / closing hangers having different widths.

(Means for Solving the Problem) A hanger opening / closing device of the present invention is configured such that one end of each of a pair of support arms is rotatably attached to a support member disposed on a side of a hanger having an openable / closable hanger arm. A receiver that engages with a connecting rod provided on the hanger arm is rotatably attached to the other end of the support arm, and the support member, the pair of support arms, and the receiver form a quadrilateral link mechanism. And a drive source for rotating the link mechanism.

(Operation) According to this configuration, since the receiver is moved by the quadrilateral link mechanism, the posture of the receiver can be made substantially constant, so that the direction of the center of rotation of the hanger arm that is added to the connecting rod even when expanding hangers of different widths. Can be reduced, and the opening can be freely set. Therefore, a single hanger opening / closing device can open and close a plurality of hangers having different widths.

(Embodiment) Next, an embodiment of the hanger opening / closing device of the present invention will be described with reference to the drawings. Note that FIG. 1 is a front view showing a state before opening the hanger, and FIG. 2 is a front view showing a state in which the hanger is opened. Since the hanger opening / closing device is provided at symmetrical positions, only one side is provided. Is illustrated.

A hanger 8 to which a hanger arm 7 is attached with a wide width and a hanger 10 to which a hanger arm (shown by a broken line) 9 is attached with a narrow width are provided to move appropriately on the manufacturing line. The hanger arm 7 of 8 is rotatably supported by the body frame 11 with the pin 12, and the hanger arm 9 of the hanger 10 is the body frame 13.
It is rotatably supported by a pin 14. A pair of hangers 8 or 10 having the same width in the front-rear direction of the manufacturing line are connected by a connecting rod 15 or a connecting rod 16 at a bent portion on the upper side of the hanger arm 7 or the hanger arm 9. The front and rear sides of the work (not shown) are clamped by the hanger arm 8 or 10 of FIG.

The hanger opening / closing device 17 is provided at a position where a work is attached / detached in the manufacturing line, and one end of each of a pair of equal-length support arms 19 and 20 is attached to a support member 18 arranged on the side of the transfer line by a pin 21 ,, respectively. It is rotatably attached by means of 22, and a receiving member 23 which is engaged with the connecting rod 15 or the connecting rod 16 for connecting the hanger 8 or the hanger 10 to the other end of each supporting arm 19, 20 is freely rotatable by means of pins 24, 25. Attached to the support arm 19 and 20 and the receiving member 23 to form a parallelogram link mechanism 26.
And a drive source 28 including a cylinder for rotating the link mechanism 26 by attaching the tip of the rod 27 to one support arm 19 on the support member 18. Further, the receiving surface 23a of the receiving tool 23 with which the connecting rod 15 or the connecting rod 16 abuts
Connects the connecting rod 15 or the connecting rod 16 with the pin 12 or the pin 14 which is the rotation center of the hanger arm 7 or the hanger arm 9 when the connecting rod 15 or the connecting rod 16 is pushed up (state of FIG. 1). By pushing up from the direction perpendicular to the straight line as much as possible, the component force of the hanger arms 7 and 9 on the connecting rods 15 and 16 toward the center of rotation is reduced, and the hanger arm 7 or the hanger arm 9 is used. 2 and the connecting rod provided on the wide hanger 8 with the pin 12 and pin 14 in the expanded position (state of FIG. 2)
15 and connecting rod 16 on narrow hanger 10
Are oriented so that they are in the same plane.

The operation of the hanger opening / closing device 17 having the above configuration will be described.

When the hanger 8 or the hanger 10 moves, the drive source 28 operates and the rod 27 shortens. Along with that, the link mechanism 26 rotates and the receiving surface 23a of the receiving tool 23 pushes up the connecting rod 15 or the connecting rod 16. At this time, the receiving surface of the receiving tool 23
23a moves in parallel and abuts against the connecting rod 15 or the connecting rod 16 so that a large component force is not applied in the direction of the pin 12 or the pin 14 which is the rotation center of the hanger arm 7 or the hanger arm 9, and is connected in that state. The rod 15 or the connecting rod 16 is lifted upward to expand the hanger arm 7 or the hanger arm 9. Therefore, the hanger arm 7 or the hanger arm 9 can be smoothly opened and closed. Further, the wide hanger arm 7 and the narrow hanger arm 9 are opened at the same opening (state shown in FIG. 2).

In this way, with one hanger opening / closing device 17,
Even hangers 8 and 10 having different widths can be reliably opened and closed without damaging the connecting rods 15 and 16 or causing a defective opening and closing operation.

In the present embodiment, the parallelogram linkage mechanism 26 is used, but the present invention is not limited to this, and the receiver
When each support arm 19 and 20 of the hanger 8 or hanger 10 comes into contact with the connecting rod 15 or the connecting rod 16 of the hanger 8 so that the component force toward the center of rotation of the hanger arm 7 or the hanger arm 9 is minimized. The length, the mounting interval of the support arms 19 and 20 on the receiving member 23 side, and the mounting interval of the supporting member 18 side may be set. Further, the opening degree of the hanger arm 7 or the hanger arm 9 may be set according to each hanger 8 or 10 by changing the direction of the receiving surface 23a of the receiving member 23.

Further, although the cylinder is used as the drive source 28 in this embodiment, other means such as a motor may be used.

(Effect of the Invention) As described in detail above, according to the present invention, the receiver can be engaged with the connecting rod of the hanger arm in an appropriate posture by moving the receiver by the quadrilateral link mechanism. When pushing up the rod, the component force toward the center of rotation of the hanger arm can be reduced to smoothly open and close the hanger. Further, since the posture of the receiving member can be made substantially constant, the opening angle of the hanger arm becomes almost constant even with hangers having different widths, and there is no trouble associated with opening and closing.

Therefore, one hanger opening / closing device can smoothly open / close hangers having different widths, and the equipment cost can be reduced.

Further, since the component force applied to the connecting rod becomes small, there is an effect that there is little distortion of the entire hanger even if it is used for a long period of time and the life of the hanger is improved.

[Brief description of drawings]

1 is a front view of the hanger opening / closing device of the present invention before the hanger is opened, and FIG. 2 is a front view of the hanger opening / closing device shown in FIG. 1 with the hanger opened. FIG. 4 is a front view showing a state before the hanger is opened in an example of a conventional hanger opening / closing device, and FIG. 4 is a front view showing a state where the hanger opening / closing device shown in FIG. 3 opens the hanger. 7,9 …… Hanger arm 8,11 …… Hanger 15,16 …… Connecting rod 18 …… Supporting member 19,20 …… Supporting arm 23 …… Receiving tool 26 …… Link mechanism 28 …… Drive source

Claims (1)

(57) [Scope of utility model registration request] 1. A pair of support arms is rotatably attached to a support member disposed laterally of a hanger having an openable / closable hanger arm, and the other end of the support arm is provided to the hanger arm. A rotatably mounted receiving member that engages with the connecting rod, and a drive for rotating the link mechanism while forming a quadrilateral link mechanism with the support member, the pair of support arms, and the receiving member. Hanger opening and closing device with a source.