JPH0630353Y2 - Jig device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a jig device used in a valve assembly line or the like for assembling a valve or parts around a valve to a cylinder head of an engine.

(Prior Art) Conventionally, as a valve assembling device, according to Japanese Patent Publication No. 52-27866, a work station for loading a cylinder head, which is a work, by a transfer device, moves up and down around a pivot parallel to a work transfer direction. An oscillating arm for oscillating is provided on the jig, and a jig with fixed locate pins for positioning the work is attached to the oscillating arm, and the cylinder head is positioned and placed on the jig by the descending operation following the feeding operation of the transfer device. Place it, and then swing the swing arm upward so that the cylinder head on the jig has a predetermined tilted posture so that the axis of the valve guide attached to it is in the vertical direction. It is known that a valve is inserted from.

(Problems to be solved by the invention) In the above, since the work is transferred by the transfer device, there is a problem that the equipment cost of the transfer system increases, and therefore the transfer apparatus is configured by a free-flow type conveyor member with low equipment cost. Is desired.

An object of the present invention is to provide a jig device capable of supporting a workpiece conveyed by such a free-flow type conveyor member in a tilted posture by stopping it at a fixed position at a work station.

(Means for Solving the Problem) In order to achieve the above object, in the present invention, a pallet is tilted in a direction orthogonal to the carrying direction at a work station in the middle of a carrying path where a work is carried on a pallet. In the jig device that is provided to support the workpiece in an inclined posture,
A jig base is provided below a pair of left and right free-flow type conveyor members that convey pallets at a constant level, and the jig base is parallel to the conveyor members arranged outside the one side conveyor member. A swinging arm that swings up and down about a pivot axis, and a jig for supporting the pallet is attached to the swinging arm so as to face the arrangement gap between the two conveyor members,
A locating pin for positioning the pallet is provided on the jig so as to project into and retract from the upper surface of the jig, and when the pallet passes through the rear portion of the upper surface of the jig, a claw piece that is pushed down by the pallet and projects upward after passing through the pallet is provided. Further, a stopper member having a cushion function for contacting the front end of the pallet and pushing back the pallet so that its rear end contacts the claw piece is provided at the front part of the jig so as to be vertically movable.

(Operation) When the pallet is carried into the work station by the conveyor member, the front end of the pallet comes into contact with the stopper member when the pallet passes over the claw piece and the claw piece projects upward, and the pallet is moved by the stopper member. When the pallet is pushed back and its rear end abuts on the pawl, the pallet is stopped at a fixed position.
Next, the locate pin is moved upward to position the pallet with respect to the jig, and in this state, the swing arm is swung upward.
According to this, the jig moves upward through the gap between the left and right conveyor members, and the pallet is lifted from the conveyor member and tilted obliquely downward toward the pivot axis of the swing arm, and the work on the pallet is tilted. The posture is reached, and a predetermined work is performed on the work in this state.

After the work is finished, the swing arm is swung downward to place the pallet on the conveyor member, the locate pin and the stopper member are moved downward to release the constraint of the pallet, and the pallet is carried out from the work station by the conveyor member.

(Embodiment) Referring to FIG. 1 to FIG. 3, (1) is a pair of left and right free-flow type conveyor members for carrying a pallet P on which a work W such as a cylinder head is placed along a carrying path. , (2) is the conveyor member (1) at the work station in the middle of the conveying path.
The jig stand located below is shown.

The conveyor member (1) is a chain (1b) with a roller (1a) that is circulated along a conveying path, and a chain guide (1c).
Consists of a pallet P and left and right conveyor members (1) (1)
Of the chain (1b) while supporting the roller (1a) of the chain (1a) while rolling the chain (1b) on the chain guide (1c) as the chain (1b) circulates. It was made possible to convey at a speed higher than the circulation speed.

The jig base (2) is provided with a support frame (3) located outside the one-side conveyor member (1), and the support frame (3) is parallel to the conveyor member (1). The pivot shaft (4) is attached so as to be at a level substantially the same as the level at which the pallet P is conveyed by the conveyor member (1), and substantially L-shaped swing arms (5) are pivotally supported at the front and rear ends of the pivot shaft (4). Then, the jigs (6) were attached to the movable ends of the swinging arms (5) and (5) so as to face the arrangement gaps of the left and right conveyor members (1) and (1).

The jig (6) is a lower plate (6a) fixed to the swing arms (5) (5).
A plurality of wall plates (6b) are erected on the wall plate (6b), and a pair of left and right upper plates (6c) are formed on the wall plates (6b) with a gap for passing the projection P ₁ at the center of the lower surface of the front end of the pallet P. (6c) is attached and sounds,
Before and after hanging on the jig base (2) on the lower surface of both ends of the lower plate (6a) 1
The piston rods (7a) and (7a) of the pair of cylinders (7) and (7) are connected, and the jig (6) is moved up and down with the swing arm (5) using the cylinder (7) as a drive source. So that the swing arm (5)
The stopper seat (5a) attached to the lower surface of the movable end of the
The upper plate (6c) of the jig (6) is positioned slightly below the carrying level of the pallet P at the lower moving position where it abuts the upper stopper (8), and the jig (6) is moved from the lower moving position. After moving the left and right conveyor members (1) (1) up to a fixed position once through the arrangement interval, the support base (3) of the jig base (2) provided on the side opposite to the support frame (3) ( 9) The movable stopper (10) provided so as to be moved forward and backward by the upper cylinder (10a) is advanced inward, and in this state, the jig (6) is moved downward to move both swing arms (5). The seat plate (5b) stretched between the movable ends of (5) is brought into contact with the movable stopper (10) to position the jig (6) at a predetermined upward movement position. In this embodiment, the movable stoppers (10) are provided in pairs before and after the support base (9), and one and the other movable stoppers of each pair are provided.
(10) The height of (10) is made different so that the upper movement position of the jig (6) can be switched in two stages according to the model. In the figure (10b)
Is an adjuster that regulates the advance position of the movable stopper (10),
(5c) shows a holding plate for preventing the pallet P stretched between the upper ends of the swinging arms (5) and (5) from rising.

For the jig (6), hook (1) on the cylinder (11a) on the lower plate (6a).
Locating pins (11) connected via 1b) are provided in a pair in a diagonal positional relationship, and each locating pin (11)
The cylinder (11a) so that the cylinder (11a) can move in and out of the upper plate (6c), and the left and right upper plates (6c) and (6c) are urged upward by springs (12a). ) Is rotatably pivoted about a shaft (12b) at the rear end of the jig (6), and a stopper member (13b) having a lever (13b) with a roller (13a) at the upper end is provided at the front of the jig (6). ) Is suspended from the lower plate (6a) by a cylinder (13c), the roller (13a) can be moved up and down between an upper operating position facing the movement path of the projection P ₁ of the pallet P and a lower escape position therebelow. The piston rod (13d) of the cylinder (13c) is equipped with a shock absorber for urging the lever (13b) in a rearward tilted posture so that the pallet P can be pushed back through the lever (13b). I chose

According to the above configuration, when the jig (6) is moved to the down position and the pallet P is carried into the work station by the conveyor member (1), the pawl P (12) is pushed down by the pallet P and the pallet P is moved. When the nail piece (12) passes over the nail piece (12)
On the other hand, the roller (13a) of the stopper member (13) in the operating position comes into contact with the projection P ₁ on the lower surface of the front end of the pallet P, and the forward movement of the pallet P causes the shock absorber to cushion the lever (13b). Pressed with, then pallet P
Slides on the roller (1a) of the conveyor member (11) and the lever (1
It is pushed back by 3b), and the rear end of pallet P is
By engaging with 2), the pallet P is stopped at a predetermined stop position based on the claw piece (12).

Next, the locate pin (11) is moved upward, and the locate pin (1
1) is fitted into the positioning hole on the bottom surface of the pallet P to position the pallet P with respect to the jig (6), and then the jig (6) is moved upward from the lower moving position to the upper plate (6c) thereof. Conveyor material (1) (1)
The upper pallet P is placed and the pallet P is lifted, and the jig (6) is positioned at a predetermined upper moving position by using the movable stopper (10) as described above.

At this time, the pallet P is tilted laterally by the swing angle of the swing arm (5), and the work W on the pallet P, for example, the cylinder head, is supported in a predetermined tilted posture such that the valve guide is vertical. In this state, the work of assembling the parts around the valve such as the valve and the valve spring is performed.

After the work is completed, move the movable stopper (10) outward, lower the jig (6) to the lower position, lower the locate pin (11) and lower the stopper member (13) to the escape position. Let According to this, the pallet P is carried out from the work station on the conveyor member (1) which is constantly driven.

(Effects of the Invention) As described above, according to the present invention, the pallet conveyed by the free-flow type conveyor member is fixed at a fixed position by the claw pieces and the stopper member provided on the jig, and the locating pin accurately controls the jig. In this state, the pallet can be lifted from the conveyor member and tilted, which has the effect of reducing the equipment cost as compared with the conventional transfer type transfer device.

[Brief description of drawings]

FIG. 1 is a plan view of an example of the device of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a right side view of FIG. W …… Workpiece P …… Pallet (1) …… Conveyor member (2) …… Jig stand (4) …… Pivot (5) …… Rotating arm (6) …… Jig (11) …… Locate pin (12) …… Claw piece (13) …… Stopper member

Claims (1)

[Scope of utility model registration request] 1. A jig device provided at a work station in the middle of a transfer path for transferring a work placed on a pallet so as to tilt the pallet in a direction orthogonal to the transfer direction to support the work in an inclined posture. A jig base is provided below a pair of left and right free-flow type conveyor members that convey pallets at a constant level, and the jig base is parallel to the conveyor members arranged outside the one side conveyor member. A swinging arm that swings up and down about a vertical axis, and a jig for supporting the pallet is attached to the swinging arm so as to face the arrangement gap between the two conveyor members, and the pallet is attached to the jig. A locating pin for positioning is provided on the upper surface of the jig so as to project and retract, and when the pallet passes through the rear portion of the upper surface of the jig, a claw piece that is pushed down by the pallet and projects upward after passing is further provided. A jig device provided with a stopper member having a cushion function, which is movable up and down, on the front portion of the jig and pushes back the pallet so that the rear end of the pallet contacts the claw piece. .