JP2578376Y2 - Caulking device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a caulking device which is particularly suitable for fixing a corner piece to a flange of an air duct for air conditioning.

[0002]

2. Description of the Related Art FIG. 1 shows a process of manufacturing a duct.
The duct body 1 is formed by caulking the edges 2 of the four surface-treated iron plates to form a rectangular tube, and in order to fill the corners 4 between the adjacent flanges 3, 3, the portions shown in FIG. The corner piece 5 is fitted, and a portion 6a of the bent piece 6 at the end of the flange 3 corresponding to the corner piece 5 is bent over the corner piece 5 to fix the corner piece 5 as shown in FIG. Conventionally, a method of hitting the portion 6a with a hammer is used to bend the portion 6a.
However, in that case, not only skill and labor are required,
Loud noise is generated.

[0003]

The object of the present invention is to enable a caulking operation quietly without requiring skill and labor.

[0004]

The first aspect of the present invention is a reciprocating drive body that moves back and forth at a rear end portion of a cylindrical body, and is connected to a front end of the reciprocal drive body via a link and uses a pin at a lower end as a fulcrum. A movable cam and a caulking arm having a front end claw pressed against the cam at a rear roller portion so that a front claw can freely enter and exit the upper portion of the front opening caulking recess at the front end of the body body and an intermediate portion supported by another pin. A return spring that normally returns the reciprocating drive to the rear end position, and a return spring that constantly presses the roller against the cam surface of the cam, wherein the cam surface is configured to push up the roller when the reciprocating drive advances. And having the claw crimp the bent piece at the upper end of the vertical flange of the duct body fitted into the caulking recess when the roller is pushed up to the corner piece immediately before the flange. Characterized by A clamping device.

According to a second aspect of the present invention, there is provided a caulking device according to claim 1, which has a handle with an activation switch at an upper end of the body.

In a third aspect of the present invention, the body is made of aluminum, and the cam is supported by the inner surface of the slit of the body from the fulcrum pin to the vicinity of the cam surface to prevent inclination. It is a caulking device.

According to a fourth aspect of the present invention, there is provided a caulking device according to claim 1, wherein a spacer for adjusting the height of the bottom surface of the caulking recess is detachably mounted.

[0008]

In FIG. 4, which shows the entire apparatus, a body body 8, a cylinder 9, a cylinder head 10 (which constitutes a cylindrical body), a handle 11, and an auxiliary handle 12 (these may be omitted). Are all made of aluminum and are joined together. A caulking arm 14 is supported on the body 8 via a pin 13. A caulking recess 17 is formed by a claw 15 at the front end of the caulking arm 14 and a fixed base 16 at the lower front end of the body 8. An activation switch 18 (button) is provided at the front end of the upper surface of the handle 11 so that the handle can be operated by the right thumb holding the handle 11. When the start switch 18 is pressed, a start valve (not shown) opens, and an air inlet 19 is opened via a rubber hose.
Is supplied, and the claw 15 is rotated in the direction of arrow A by a mechanism described later, so that caulking is performed.

In FIG. 5, which shows a longitudinal section of FIG. 4, the rear end of the cylinder 9 is screwed to the cylinder head 10 via an O-ring (not shown) which keeps the air tight with a screw portion 21, and the front end is It is screwed into the body 8 in the same manner with the screw portion 22. A piston 24 (reciprocating drive) is slidably fitted into the cylinder 9 via a packing 23, and a pressurizing chamber 25 between the piston 24 and the cylinder head 10 is connected to an air inlet 19. A metal fitting 27 having a tongue-shaped projection 26 is fixed to the front center of the piston 24 by a bolt 28, and the rear ends of a pair of links 29 sandwiching the projection 26 are connected to the projection 26 by a pin 30. doing. The front end of the link 29 sandwiches the outer periphery of the fan-shaped flat cam 32 and is connected to the flat cam 32 by pins 33. The cam 32 is a pin 34
The cam surface 35 is supported by the body main body 8 through the pin and has a cam surface 35 which is a part of a circle centered on the point O1 behind the pin 34 at the upper end. Reference numeral 36 denotes a return spring composed of a compression coil spring, which normally urges the piston 24 to the rear end position shown in the drawing (when the pressurized air is not supplied to the pressurizing chamber 25). Maintain the standby position.

A return spring 38 made of a compression coil spring abuts on the lower surface of the caulking arm 14 slightly in front of the pin 13 to give a moment indicated by an arrow B to the caulking arm 14, whereby the caulking arm 14 has a rear end. A roller 40 supported by a pin 39 at the forked portion is in pressure contact with the cam surface 35. Reference numeral 41 denotes a screw hole for attaching a spacer to be described later.

FIG. 6 shows a part of the front surface of FIG.
Are the slits that support the cam 32 (FIG. 5)
3 is a hole for supporting the pin 34, 44 is a slit for properly supporting the caulking arm 14, 45 is a hole for supporting the pin 13, and 46 is a screw hole into which the auxiliary handle 12 (FIG. 4) is screwed. The slit 42 sandwiches the cam 32 with a small gap from both sides in the range of the height of H1 in FIG. 5 to prevent the cam 32 from falling down. The distance (lift) between the contact point P1 of the cam surface 35 and the roller 40 and the pin 34 increases toward the rear of the cam surface 35, but the distance between the cam surface 35 and the roller 40 increases.
Is kept constant.

When the caulking recess 17 shown in FIG. 5 is fitted to the flange 3 of the duct body 1 and the bent piece 6 (the corner piece 5 is fitted therein) and the switch 18 is pressed down, pressure is applied from the air inlet 19. A pressurized air is introduced into the chamber 25, and the piston 24 moves forward against the elasticity of the return spring 36. Then, the cam 32 rotates forward around the pin 34,
The caulking arm 14 rotates in the direction A about the pin 13, and the claw 15 caulks the bent piece 6 onto the corner piece 5 as shown by 6 a.

The thickness of the flange 3 and the corner piece 5 may be changed by the manufacturer. As a countermeasure, the bottom of the caulking recess 17 is raised so that the depth of the caulking recess 17 can be changed. Spacer 48
It is convenient to adopt (FIGS. 7 to 9). The thickness H2 of the spacer body portion 48a in FIG. 7 abuts against the bottom surface of the caulking recess 17 to raise the bottom surface by H2. 9 is a notch into which a bolt (not shown) screwed into the bolt hole 41 (FIG. 1) fits. The spacer 49 of FIG. 10 is fixed to the body 8 by screws 50. The spacer 51 shown in FIG. 11 is a pressed product having a U-shaped cross section, and an arc-shaped projection 52 is elastically fitted into the groove 53. The spacer 54 in FIG. 12 is attracted to a magnet 55 embedded in the body 8. Note that, instead of the air-type piston 24 in FIG. 5, a reciprocating drive body driven back and forth by a motor may be employed.

[0014]

According to the first invention, a large caulking force can be obtained at the claw 15 by the caulking arm 14 with the cam 32 and the roller 40, and the caulking operation can be performed easily and quietly without any skill. Will be able to proceed. Even when the handle 11 is not provided, the work can be performed by holding the cylinder 9 with both hands.

According to the second invention, the operation can be performed simply by grasping the handle 11 with, for example, the right hand, so that the work is facilitated and the efficiency is improved. When the handle 11 with the start switch 18 is provided at the upper end of the body 8, when the handle 11 shown in FIG. 5 is grasped with, for example, the right hand, the body 8 is in a horizontal posture, and the corner piece 5 is swaged with the left hand to form the recess 17. The bent piece 6 can be deformed to the position of 6a in a state where it is pressed against the flange 3 fitted therein, and can be caulked to the corner piece 5, thereby improving the accuracy.

According to the third invention, not only is the overall weight reduced and the operation is facilitated, but also the cam 32 is reliably prevented from falling down and the caulking force can be efficiently transmitted to the roller 40.

According to the fourth invention, the apparatus of the first invention can be used effectively even when the thickness of the corner piece 5 or the like is changed by the manufacturer.

[Brief description of the drawings]

FIG. 1 is a perspective view of a semi-finished product of a duct.

FIG. 2 is a partial cross-sectional perspective view showing a state where a corner piece is fitted.

FIG. 3 is a perspective view of a completed duct.

FIG. 4 is a perspective view of the caulking device according to the present invention.

FIG. 5 is a longitudinal sectional view.

FIG. 6 is a partial front end view of FIG. 5;

FIG. 7 is a plan view of a spacer.

FIG. 8 is a front view of a spacer.

FIG. 9 is a right side view of the spacer.

FIG. 10 is a horizontal sectional view of another spacer.

FIG. 11 is a horizontal sectional view of still another spacer.

FIG. 12 is a horizontal sectional view of still another spacer.

[Explanation of symbols]

 8 Body Body 11 Handle 13 Pin 14 Caulking Arm 15 Claw 18 Start Switch 24 Piston (Reciprocating Driver) 29 Link 32 Cam 34 Pin 35 Cam Surface 36 Return Spring 38 Return Spring 40 Roller 42 Slit 48 Spacer

Claims (4)

(57) [Scope of request for utility model registration] 1. A reciprocating drive body that moves back and forth at a rear end portion of a cylindrical body, a cam connected to a front end of the reciprocal drive body via a link and rotatable around a pin at a lower end as a fulcrum, A caulking arm, which is pressed against the cam by a roller portion at the rear end and the pawl at the front end can freely enter and exit the upper portion of the caulking concave portion at the front opening of the front end of the body body, and the intermediate portion is supported by another pin,
A return spring that returns the reciprocating drive to the normal rear end position, and a return spring that constantly presses the roller against the cam surface of the cam,
The cam surface has a shape that pushes up the roller when the reciprocating drive advances, and a bent piece at the upper end of a vertical flange of the duct body that fits in the caulking recess when the roller is pushed up. Wherein the claw is caulked to a corner piece immediately before the flange. 2. The caulking device according to claim 1, further comprising a handle provided with an activation switch at an upper end of the body body. 3. The caulking device according to claim 1, wherein the body body is made of aluminum, and the cam is supported by the inner surface of the slit of the body body from the fulcrum pin to the vicinity of the cam surface to prevent inclination. 4. The caulking device according to claim 1, wherein a spacer for adjusting the height of the bottom surface of the caulking recess is detachably mounted.