JPH078117Y2 - Clamp device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a clamp device composed of a clamp and a clamp which are operated by a cylinder or the like, and can be used in an assembly process of an automobile frame or the like.

[Conventional technology]

For example, a frame of an automobile is assembled by welding several cross members to a pair of left and right side members, and at the time of assembly, the side members and the cross members are welded while being clamped by a clamp device. As shown in FIG. 4, a conventional clamp device of this type has a receiving member (2) for supporting a work (1) such as a side member constituting a frame of an automobile, and a bracket (2) for the receiving member (2). 3)
And a clamp (5) which is rotatably supported via a support pin (4), and the clamp (5) is rotated by an appropriate means, for example, a cylinder (6), to be a receiver (2). It is configured to clamp and unclamp the supported work (1).

[Problems to be solved by the invention] By the way, in order to improve productivity, in a vehicle production line, usually, multi-product small-medium-volume production is performed in which a plurality of vehicle types are produced on the same production line. There is.

However, in the conventional clamping device as shown in FIG. 4, the work (1) can be clamped only at the same position, and in the above-mentioned multi-product small-medium-volume production method, the work is changed when the vehicle type changes. Since the clamp position changes, a clamp device is installed corresponding to the clamp position of the work according to the vehicle type, and the work is clamped by selectively operating the clamp device corresponding to the vehicle type.

However, this requires a large number of clamp devices according to the type of automobile, and thus has a large cost demerit, and also requires a large space for installing a large number of clamp devices.

The present invention has been made in view of the above problems, and an object thereof is to provide a clamp device that can appropriately change the clamp position of a work.

[Means for Solving the Problems]

In order to achieve such an object, the clamp device of the present invention includes a work support for supporting a work, a clamp head pivotally supported by the work support, and a pivot support for the work support. A spacer attached to the tip of the arm to be supported, means for swinging the clamp head,
It comprises means for swinging the arm, and the spacer is interposed between the work and the clamp head or between the work receiving plate and the work when the work is clamped.

[Action]

In the present invention, a spacer is interposed between the work receiving plate and the clamp head, and the spacer is moved, so that the clamp position of the work can be appropriately changed.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

In FIG. 1, (11) is a work holder fixed on the base (12), and the upper end is cut out to hold the gripping surfaces (13) (14).
Has been formed. Reference numeral (15) is a clamp head pivotally supported by a work holder (11) via a bracket (16) and a pin (17), and has a notched tip portion to grasp a gripping surface (18).
(19) has been formed. Reference numeral (20) is a clamp cylinder whose base end is pivotally supported by a base (12) via a bracket (21) and a pin (22). The tip of a piston rod (23) is located at the rear end of the clamp head (15). It is connected via a pin (24).

(25) is a work holder (11) with a pin (26) at the middle bent part.
An L-shaped arm rotatably supported via a spacer (27) is attached to the tip of one arm rod (25a) via a pin (28). Reference numeral (29) is a spacer switching cylinder whose base end is pivotally supported by the base (12) via the bracket (30) and the pin (31). The tip end of the piston rod (32) is connected to the other end of the L-shaped arm (25). Is connected to the tip of the arm rod (25b) via a pin (33). Reference numeral (34) denotes a work such as a side member which constitutes a frame of the automobile. Depending on the type of the automobile, the clap position is a gripping surface (1
3) Move slightly to the A and B positions above and left and right in the figure.

Next, the operation of the above device according to the present invention will be described. First, when the work (34) is clamped at the A position from the unclamped state shown in FIG. 1, after the work (34) is placed at the A position on the gripping surface (13) of the work support (11). By extending the piston rod (32) of the spacer switching cylinder (29) and rotating the L-shaped arm (25) about the pin (26) in the counterclockwise direction in the figure by a predetermined angle,
The spacer (27) is positioned in contact with the left side surface of the work (34) in the figure. In this state, the piston rod (23) of the clamp cylinder (20) is extended and the clamp head (1
5) Rotate the pin (17) about the pin (17) in the counterclockwise direction in the figure by a predetermined angle to hold the clamping surface (18) of the clamp head (15).
By pressing (19) the upper surface of the work (34) and the right side surface of the spacer (27) in the figure, the work (34) is held between the grip surface (13) of the work support (11) and the clamp head (15). At the same time as gripping between the gripping surfaces (18), the work support (1
1) gripping surface (14) and clamp head (15) gripping surface (1
It is clamped at position A by gripping it between spacers (27) via the spacer (27) (see FIG. 2).

Next, from the unclamped state shown in FIG. 1, the work (34)
In order to clamp at the B position, extend the piston rod (32) of the spacer switching cylinder (29) and rotate the L-shaped arm (25) about the pin (26) by a predetermined angle in the counterclockwise direction in the figure. By moving the spacer (27), the spacer (27) is brought into contact with and positioned on the right side of the grip surface (14) of the work holder (11) in the figure. In this state, the work (34) is placed at the position B on the gripping surface (13) of the work support (11) with the spacer (27) in contact with the right side in the figure, and then the clamp cylinder (20). Of the clamp head (15) is extended by rotating the clamp head (15) about the pin (17) in the counterclockwise direction in the figure by a predetermined angle to extend the piston rod (23) of the clamp head (15). By pressing the upper surface of the work (34) and the right side surface in the figure, the work (34)
(1) gripping surface (13) and clamp head (15) gripping surface (1)
8) and at the same time, the workpiece is clamped at the position B by gripping it between the gripping surface (14) of the work holder (11) and the gripping surface (19) of the clamp head (15) via the spacer (27) ( (See FIG. 3).

The present invention can be used not only for clamping a work such as a side member constituting a frame of an automobile but also for clamping any work having a slightly different clamp position.

[Effect of device]

According to this invention, since a spacer is interposed between the work holder and the clamp head to move the spacer, it is possible to correspond to a plurality of clamp positions, so that a plurality of different types of works can be conveyed. When used in a production line where
The space can be effectively used and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a drawing showing an embodiment of the clamp device according to the present invention, and FIGS. 2 and 3 are drawings showing the clamped state. FIG. 4 is a view showing a conventional clamp device. (11) …… Workpiece receiver, (15) …… Clamp head,
(20) …… Clamp cylinder, (25) …… L-shaped arm,
(27) …… Spacer, (29) …… Spacer switching cylinder, (34) …… Workpiece.

Claims (1)

[Scope of utility model registration request] 1. A work support for supporting a work, a clamp head rotatably supported by the work support, and an end of an arm rotatably supported by the work support. A spacer, a means for swinging the clamp head, and a means for swinging the arm. When the work is clamped, the spacer is interposed between the work and the clamp head or between the work receiver and the work. A clamp device characterized by the above.