JPH09323192A - Device for holding posture of work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work posture holding device which can always uniformly pressurize the work on an upper jig plate. SOLUTION: This device is constituted so as to lift a lower jig plate 41 set with the work 3 with an actuator and bring the upper surface 3a of the work 3 into press-contact with the upper jig plate 9. In this case, a plate 37 formed with plural shaft insert holes 39 each having tapered part 39a gradually expanded downward is fitted to an actuator. Plural pieces of shafts 43 each formed with a tapered part 43a engaged with the tapered part 39a at the lower end part are inserted to the lower jig plate 41 while inserting the respective shaft insert holes 39 and also, a coil spring 45 inserted with each shaft 43 is put between the lower jig plate 41 and the plate 37.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a work posture holding device used for manufacturing a silencer or the like.

[0002]

2. Description of the Related Art Conventionally, a silencer mounted on a vehicle exhaust system is disclosed in Japanese Patent Application Laid-Open No. 61-195722, in which a thin plate made of metal is bent into a cylindrical shape and its side edges are welded. After joining by a rock seaming process like this to form a shell, incorporate a baffle plate with a muffler pipe and a front pipe inserted into the shell, and close the openings at both ends of the shell with end plates to remove the front pipe and rear pipe. It is manufactured by welding to the end plate.

Incidentally, in welding the front pipe and the rear pipe to the end plate as described above, the work posture holding device 1 as shown in FIGS. 6 and 7 is conventionally used.

This work posture holding device 1 lifts a lower jig plate 5 on which a work (silencer) 3 is set by an actuator such as an air cylinder 7 so that the upper surface (guide receiving surface) 3a of the work 3 is an upper jig. The work 3 is positioned by pressing it against the plate 9, and after the work 3 is positioned by the work posture holding device 1 as described above, the welding machine 11 incorporating the work posture holding device 1 as shown in FIG. With the torch 13, the front pipe 15 is welded to the end plate all around.

6 and 7, reference numeral 17 denotes a plate connected to the lower jig plate 5 via four rigid spacers 19, and the piston rod 7a of the air cylinder 7 is connected to the center of the plate 17. At the same time, the guide shafts 21 are attached to the left and right sides of the plate 17 with the piston rod 7a interposed therebetween along the piston rod 7a,
The air cylinder 7 is connected to the jig support 2 via the bracket 23.
5 is attached.

The upper jig plate 9 is attached to the upper part of the jig support 25, and when the lower jig plate 5 is guided by the guide shaft 21 and moves upward due to the extension of the piston rod 7a of the air cylinder 7. The upper surface 3a of the work 3 set on the lower jig plate 5 abuts the upper jig plate 9, and the work 3 is positioned.

In addition, in FIG. 6, 27 and 29 are work guides attached to the upper jig plate 9 and the lower jig plate 5, and 31 and 33 are jig columns 27 and the lower jig plate 5, respectively. Work guide members attached to the
Is a rear pipe inserted into the end plate of the work 3, and the work guides 27 and 29 are respectively attached to the upper jig plate 9 and the lower jig plate 5 along the inner circumference of the openings at both ends of the shell forming the work 3. It is installed in 4 places.

[0008]

However, in the work posture holding device 1, since the lower jig plate 5 and the plate 17 connected via the rigid spacer 19 are integrated, the work 3 is machined, for example. When the work 3 set on the lower jig plate 5 is tilted with poor accuracy, even if the lower jig plate 5 is lifted by the air cylinder 7 and the work 3 is abutted against the upper jig plate 9, 3a does not completely adhere to the upper jig plate 9, so that
There is a drawback that the front pipe 15 cannot be reliably welded to the end plate due to a gap between the locus of the torch 13 and the welded portion.

The present invention has been devised in view of such circumstances, and the lower jig plate on which the work is set is lifted by an actuator, and the upper surface of the work is pressed against the upper jig plate to position the work. In view of the above, it is an object of the present invention to provide a work posture holding device capable of absorbing the inclination of the work and the like and constantly pressing the work uniformly against the upper jig plate.

[0010]

In order to achieve such an object, the invention according to claim 1 lifts a lower jig plate on which a work is set by an actuator and presses the upper surface of the work against the upper jig plate. In a work posture holding device for positioning a work by attaching a plate having a plurality of shaft insertion holes each having a taper portion that gradually expands downward to the actuator, a lower jig plate is attached with a plate.
While inserting the shaft insertion holes, a plurality of shafts having tapered portions formed on the lower end side that engage with the tapered portions are inserted, and between the lower jig plate and the plate,
A coil spring through which the shafts are inserted is stretched.

(Operation) According to the work posture holding device of the first aspect, the lower jig plate supported by the coil spring rises and the upper surface of the work is cured as the plate moves up by the operation of the actuator. Press onto the ingredient plate. Then, for example, when the machining accuracy of the work is poor and the work itself set on the lower jig plate is tilted, if the lower jig plate lifts and a part of the upper surface of the work comes into pressure contact with the upper jig plate. , The coil spring is moved by the lift force of the actuator according to the inclination of the work,
Alternatively, the entire upper surface of the work is pressed against the upper jig plate by the lower jig plate lifted by bending in the vertical direction and contracting.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. Since the configuration excluding the invented portion is the same as that of the conventional example shown in FIG. 6 and subsequent figures, the same components are designated by the same reference numerals and their description is omitted. FIG.
2 shows an embodiment of the work posture holding device according to claim 1, wherein 37 is a plate fixed to the tip of the piston rod 7a of the air cylinder 7, and the plate 37 is provided with a plate shown in FIG. As shown in FIG. 5, four shaft insertion holes 39 each having a tapered portion 39a that gradually expands downward.
However, the piston rod 7a is formed substantially at the center thereof, and the guide shafts 21 are inserted on the left and right sides of the piston rod 7a.

Further, in FIG. 1, reference numeral 41 is a lower jig plate for setting the work 3, and similarly to the lower jig plate 5 shown in FIG. 6, work guides 29 are provided on the upper surface of the lower jig plate 5 at both ends of the shell constituting the work 3. It is attached along the inner circumference of the opening. Then, as shown in FIG. 3, the lower jig plate 41
A plurality of shafts 43, each of which has a tapered portion 43a formed on the lower end side and which is inserted into each of the shaft insertion holes 39 and engages with the tapered portion 39a, is inserted in parallel with the piston rod 7a. Lower jig plate 41 and plate 3
A coil spring 45 is stretched between each of the shafts 43 and 7 around the shaft 43.

When the work 3 is set on the lower jig plate 41 as shown in FIG. 1, the lower jig plate 41 is supported by the spring force of each coil spring 45 and hardly descends. Also, as shown in FIG. 4, the tapered portion 43 of the shaft 43 is attached to the tapered portion 39a of the shaft insertion hole 39.
By engaging a, the lower jig plate 41 is prevented from swinging or rattling.

The shaft insertion hole 39 is formed in the shaft 43.
It is set to a slightly larger diameter. Then, when the air cylinder 7 is operated to extend the piston rod 7a in this state, the lower jig plate 41 supported by the coil spring 45 rises as the plate 37 rises,
Although the upper surface 3a of the work 3 is pressed against the upper jig plate 9,
The total sum of the spring forces of the coil springs 45 is set to be smaller than the thrust F of the air cylinder 7.

Therefore, for example, when the machining accuracy of the work 3 is poor and the work 3 itself set on the lower jig plate 41 is tilted, the lower jig plate 41 is lifted and a part of the upper surface 3a of the work 3 is partially removed. When pressed against the upper jig plate 9, the thrust F of the air cylinder 7 causes the coil spring 45 to flex forward, backward, leftward, rightward, or downward in accordance with the inclination of the work 3, and contracts to the upper surface 3a of the work 3, as shown in FIG. The whole is pressed against the upper jig plate 9.

The work posture holding device 47 according to the present embodiment.
Is configured in this way, the front pipe 15
To weld the entire circumference of the end plate to the end plate,
After the lower end of the work 3 is positioned and set on the work guide 29 provided on the lower jig plate 41, the air cylinder 7 is operated to lift the lower jig plate 41.

When the air cylinder 7 thus operates and the piston rod 7a extends, the lower jig plate 41 supported by the coil spring 45 rises as the plate 37 rises as described above. Top 3 of work 3
a is pressed against the upper jig plate 9. Also, for example, work 3
When the workpiece 3 itself set on the lower jig plate 41 is tilted, the lower jig plate 41 is lifted and a part of the upper surface 3a of the workpiece 3 becomes the upper jig plate 9. When pressed, the coil spring 45 is moved by the thrust F of the air cylinder 7 in accordance with the inclination of the work 3, front and rear, left and right,
Alternatively, the lower jig plate 41 is bent by contracting vertically and contracting.
The entire upper surface 3a of the work 3 is pressed against the upper jig plate 9 as a result of the lift.

As described above, according to this embodiment,
Even when the machining accuracy of the work 3 is poor and the work 3 itself set on the lower jig plate 41 is tilted, the coil spring 45 moves forward, backward, leftward, rightward, leftward, rightward, or negative Alternatively, the work 3 is evenly pressed by the upper jig plate 9 and the upper surface 3a comes into close contact with the upper jig plate 9 because the work 3 is evenly bent and absorbs the inclination, and as a result, the torch 13 of the welding machine 11 moves. It is possible to reliably weld the front pipe 15 to the end plate without any deviation between the locus and the welded portion.

In the above embodiment, the present invention is applied to the work posture holding device used for manufacturing the silencer, but the present invention is not limited to the silencer and is also applied to the work posture holding device used for manufacturing other devices. Of course, it can be done.

[0021]

As described above, according to the work posture holding device of the first aspect, even when the work accuracy of the work is poor and the work itself set on the lower jig plate is tilted, When the tool plate is lifted, the coil spring bends in the front-back, left-right, or up-down direction according to the tilt of the work to absorb the tilt, so that the work is uniformly pressed by the upper jig plate and the upper surface of the upper jig plate. It became a close contact with.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of a work posture holding device according to claim 1.

FIG. 2 is a side view of the work posture holding device shown in FIG.

FIG. 3 is an enlarged front view of a main part of the work posture holding device shown in FIG.

FIG. 4 is an enlarged front view of a coil spring when a work is set.

FIG. 5 is an enlarged front view of a coil spring when a work is positioned.

FIG. 6 is a front view of a conventional work posture holding device.

FIG. 7 is a side view of a conventional work posture holding device.

FIG. 8 is a side view of a welding machine in which a conventional work posture holding device is incorporated.

[Explanation of symbols]

 3 Work 7 Air Cylinder 7a Piston Rod 9 Upper Jig Plate 15 Front Tube 21 Guide Shaft 37 Plate 39 Shaft Insertion Hole 39a, 43a Taper 41 Lower Jig Plate 43 Shaft 45 Coil Spring 47 Work Posture Holding Device

Claims (1)

[Claims] 1. A lower jig plate (41) on which a work (3) is set is lifted by an actuator to move the work (3).
In the work posture holding device for positioning the work (3) by pressing the upper surface (3a) of the work piece to the upper jig plate (9), the actuator has a taper portion (39a) that sequentially expands downward. A plate (37) having a plurality of shaft insertion holes (39) is attached, and the shaft insertion holes (3) are attached to the lower jig plate (41).
9), and a plurality of shafts (43) each having a taper portion (43a) engaging with the taper portion (39a) formed on the lower end side thereof are inserted and attached to the lower jig plate (41). Between the plate (37),
A work posture holding device, wherein a coil spring (45) through which each shaft (43) is inserted is stretched.