JPH04104237U - Mandrel for inner lock seam device for silencer - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention relates to a mandrel used in a silencer inner lock seam device for forming the outer cylinder of a silencer attached to the exhaust system of an automobile, etc., and relates to a metal plate wrapped around the mandrel. The purpose is to make it possible to easily pay out. [Configuration] A mandrel 10 around which a metal plate 40 is wound,
In an inner lock seam device for a silencer, the device has a folding mechanism 50 for folding the metal plate 40 wound around the mandrel 10, and a dispensing claw member 51 for discharging the cylindrical body 40 of the folded metal plate from the mandrel 10. ,
The mandrel 10 is divided into a fixed member 20 and a movable member 30, and the movable member 30 is configured to be able to move toward and away from the fixed member 20 by a drive device 23.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a method for forming the outer cylinder of a silencer installed in the exhaust system of automobiles, etc. This relates to a mandrel used in an inner lock seam device for a silencer. .

0002

[Conventional technology]

Conventionally, this type of inner lock seam device for silencers has been developed, for example, by The one disclosed in Publication No. 195722/1983 is known. In this conventional inner lock seam device for a silencer, as shown in FIGS. 4 and 5, As shown, a mandrel is supported by a core metal 2 and wraps a metal plate 3 around its outer peripheral surface. A mechanism for folding the metal plate 3 wound around the mandrel 1 ( (not shown), and a cylindrical body 4 of a metal plate folded in half from the mandrel 1. It has a protruding claw member 5.

0003 According to this conventional inner lock seam device for a silencer, as shown in FIG. After wrapping the metal plate 3 around the mandrel 1, on the upper side of the mandrel 1, By folding both ends of the cylindrical body 4 using a folding mechanism that does not Next, as shown in FIG. 4, the dispensing claw member 5 is brought into contact with the end of the cylindrical body 4. After that, the cylindrical body 4 is removed from the mandrel 1 by moving it in the direction of the arrow. can be done.

0004

[Problem that the idea aims to solve]

However, in this conventional inner lock seam device for silencers, After the cylindrical body 4 is tightly wrapped around the mandrel 1, the mandrel 1 It is difficult to withdraw money from Especially when using stainless steel plates, Because it is easy to wrap tightly around the mandrel 1, the ejecting claw member 5 comes off during extraction, and the cylinder There is a possibility that the object 4 may not be dispensed.

[0005] Furthermore, there is a risk that the cylindrical body 4 may be scratched when removed, resulting in poor appearance. Furthermore, since the mandrel 1 is made of metal material, its handling is difficult. It was difficult. This invention was devised to solve these conventional problems, and its purpose is to: Silencer insert that allows you to easily remove the metal plate wrapped around the mandrel An object of the present invention is to provide a mandrel for a Narloc seam device.

[0006]

[Means to solve the problem]

The mandrel of the inner lock seam device for a silencer according to the present invention is wound with a metal plate. A mandrel for tightening and a method for folding a metal plate wrapped around this mandrel. A folding mechanism and a dispensing claw section for dispensing the cylindrical body of the folded metal plate from the mandrel. In the inner lock seam device for a silencer having a material, the mandrel is fixed It is divided into a side member and a movable member, and the movable member is driven against the fixed member by a drive device. It is constructed so that it can be moved closer and further away.

[0007]

[Effect]

In this invention, the movable member is connected to the stationary member by operating the drive device. This mandrel is placed a predetermined distance away from the Wrap a metal plate around the outer periphery in the usual manner, and use the seam folding mechanism to fold both sides of the metal plate. Fold the ends to form a cylindrical body. After that, actuate the drive device to move the moving member. to the fixed side member side, and make the outer circumference smaller than the outer circumference of the mandrel during wrapping forming. However, it can be easily dispensed by pushing the cylindrical body with the dispensing claw member.

[0008]

【Example】

Hereinafter, embodiments of the present invention will be described based on the drawings. Figure 1 shows an embodiment of the mandrel of the inner lock seam device for a silencer according to the present invention. It shows. The mandrel 10 has the shape of a normal mandrel with one arcuate part removed. A fixed side member 20 and a movable side member 3 having the same outer shape as one of the removed circular arc parts. 0.

[0009] The fixed side member 20 is made of a hollow member whose outer periphery and both ends are made of plate material. Fixed side member main body 21 and plate materials 21a, 21a at both ends of this fixed side member main body 21 A core bar 22 passing through the core bar 22, a hydraulic cylinder 23 built into the core bar 22, and a hydraulic cylinder 23 built into the core bar 22. A pusher that comes into contact with the rams 23a, 23a protruding from two locations of the hydraulic shin lid 23 push rods 24, 24 and a slide guide installed near this push rod 24. 25, 25, 25, 25.

0010 Here, the hydraulic cylinder 23 normally has rams 23a and 23 provided at two locations. a is contracted by a built-in spring, and when wrapping a metal plate 40, which will be described later, The rams 23a, 23a are pushed out by hydraulic pressure according to a command from a control device not shown. It is configured as follows. The moving member 30 is a hollow member whose outer periphery and both ends are made of plate material. , a moving side member main body 31 connected to the tips of the push rods 24, 24, and a slider. A slide rail 32 provided at a position corresponding to the guides 25, 25, 25, 25, 32, 32, 32.

[0011] Next, the operation of this embodiment will be explained. First, as shown in FIG. 1(A), the hydraulic cylinder 23 is When the rams 23a, 23a provided at the two locations are pushed out, the push rod is pushed out. The doors 24, 24 push the moving member 30 a predetermined distance as shown by arrow A. This distance is such that the outer peripheries of the fixed side member 20 and the movable side member 30 are within a predetermined mandold. The stroke should be the same outer circumference as the rail.

0012 As a result, the mandrel 10 is is formed. Next, a metal plate 40 is wound around this mandrel 10 in a conventional manner, and then Both ends of the metal plate 40 are folded by the folding mechanism 50 to form a cylindrical body 41. do.

[0013] Next, as shown in FIG. 1(B), the hydraulic cylinder 2 is activated by operating the control device. Release the pressure 3 and pull the rams 23a, 23a provided at two locations using the built-in spring. Following this, the push rods 24, 24 are moved by a spring (not shown). As shown by arrow B, it is pulled back a predetermined distance in the direction of the fixed side member 20, and the The outer circumference is smaller than the outer circumference of the handle 10.

[0014] Thereafter, the cylindrical body 41 is pushed using the dispensing claw member 51 in a conventional manner. It can be easily dispensed by. As described above, this embodiment includes the mandrel 10 around which the metal plate 40 is wound, and the mandrel 10 around which the metal plate 40 is wound. A folding mechanism 50 for folding the metal plate 40 wound around the mandrel 10; A dispensing claw member for dispensing the cylindrical body 41 of the Z-folded metal plate 40 from the mandrel 10 51, in which the mandrel 10 is , is divided into a fixed side member 20 and a moving side member 30, and the moving side member 30 is equipped with a hydraulic cylinder. It is configured so that it can be moved close to and away from the fixed member 20 by a driver (drive device) 23. Therefore, during the winding operation of the metal plate 40, the hydraulic cylinder (drive device) 2 3, the moving member 30 is pushed out to have an external shape equivalent to that of a predetermined mandrel. After that, it can be carried out in the same manner as before, and when the molded cylindrical body 41 is extracted, The mandrel 10 is moved by drawing the movable member 30 toward the fixed member 20. A cylindrical body 41 made of a metal plate having a small outer shape and folded in a shape is placed on a mandrel 10. The dispensing claw member 51 allows for easy extraction.

[0015] As a result, even if the metal plate 40 is tightly wrapped around the mandrel 10, When extracting the molded cylindrical body 41, the movable side member 30 is in contact with the stationary side member 20. The outer circumference of the mandrel 10 becomes small, and the end of the cylindrical body 41 Just by touching and moving the dispensing claw member 51, the cylindrical body 41 is not damaged. , can be easily paid out. That is, as in the conventional case, on the inner surface of the cylindrical body 41, There is no risk of scratches.

[0016] Therefore, the conventional method uses stainless steel plates that are difficult to extract. The cylindrical body 41 can be easily removed, and the durability of the silencer can be improved. becomes. Moreover, the mandrel 10 can be moved with the fixed side member 20 formed of a hollow material. Since it is composed of a moving side member 30, it is It is extremely lightweight and easy to handle.

[0017] In the above embodiment, the movable member 30 is moved by the hydraulic cylinder 23. Although the present invention is not limited to this, for example, the case shown in FIG. By providing a special camshaft 60 and rotating the cam 61, the push rod The movable member 30 may be pushed out by pushing the pad 24. Also, instead of the hydraulic cylinder 23, the push rod 24 is connected by a link mechanism. Alternatively, the moving member 30 may be pushed out by pressing .

[0018]

[Effect of the idea]

As explained above, the present invention consists of a mandrel for wrapping a metal plate, and a mandrel for wrapping a metal plate. The folding mechanism that folds the metal plate wrapped around the rail, and the folded metal plate An inner rod for a silencer having a dispensing claw member for dispensing a cylindrical body from a mandrel. In the Kushime device, the mandrel is divided into a fixed side member and a movable side member, The movable member is configured to be able to move close to and away from the fixed member by a drive device. This makes it easy to take out the molded cylindrical body, and the cylinder is The scratches on the inside of the body are almost gone. In particular, strips that can be tightly wrapped around a mandrel Suitable for manufacturing silencers using stainless steel materials.

[Brief explanation of drawings]

FIG. 1 is a front view showing a step of forming a cylindrical body using a mandrel or a step of extracting a cylindrical body of an inner lock seam device for a silencer according to an embodiment of the present invention.

FIG. 2 is a longitudinal cross-sectional view of FIG. 1;

FIG. 3 is a front view of a mandrel of an inner lock seam device for a silencer according to another embodiment.

FIG. 4 is a side view showing a mandrel of a conventional inner lock seam device for a silencer.

FIG. 5 is a front view showing a mandrel of a conventional inner lock seam device for a silencer.

[Explanation of symbols]

10 Mandrel 20 Fixed side member 23 Hydraulic cylinder (drive device) 30 Moving side member 40 Metal plate 41 Cylindrical body 50 Folding mechanism 51 Dispensing claw member

Claims (1)

[Scope of utility model registration request] 1. A mandrel (10) around which a metal plate (40) is wound, a seam folding mechanism (50) that haze-folds the metal plate (40) wound around the mandrel (10), and a haze-folding mechanism (50) that haze-folds the metal plate (40) wound around the mandrel (10); The cylindrical body (41) is placed on a mandrel (1
In the inner lock seam device for a silencer having a dispensing claw member (51) dispensing from the fixed side member (2
0) and a movable member (30), and the movable member (30) is divided into a fixed member (20) by a drive device (23).
A mandrel for an inner lock seam device for a silencer, characterized in that the mandrel is configured so that it can be moved close to and separated from the mandrel.