JPH0593628U - Caulking device - Google Patents

Abstract

(57) [Summary] [Purpose] The objective is to enable caulking work quietly and without requiring skill and effort. [Structure] A reciprocating drive member that moves back and forth at a rear end portion of a tubular body, a cam that is connected to a front end of the reciprocating drive member through a link and is rotatable around a pin as a fulcrum, and a rear end of the cam. A crimping arm that press-contacts with the end roller portion and the front end claw can freely go in and out of the caulking recess at the front end of the body body and the middle part is supported by another pin, and a return spring that returns the reciprocating drive body to the normal rear end position, And a return spring that constantly presses the roller against the cam surface of the cam, and the cam surface has a shape that pushes up the roller when the reciprocating driving body advances.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a caulking device particularly suitable for fixing a corner piece to a flange of an air-conditioning air duct.

[0002]

[Prior Art]

 FIG. 1 shows the duct in the process of being manufactured. The duct body 1 is formed by connecting the edges 2 of four surface-treated iron plates by caulking to form a square tube, and the corner portion between the adjacent flanges 3 and 3 is formed. 2 is fitted to that portion in order to fill 4 and the portion 6a corresponding to the corner piece 5 of the bent piece 6 at the tip of the flange 3 is bent over the corner piece 5 to form a corner. The piece 5 is fixed as shown in FIG. Conventionally, in order to bend the above portion 6a, a method of hitting the portion 6a with a hammer has been adopted. However, in that case, not only is skill and labor required, but also a large amount of noise is generated.

[0003]

[The purpose of the device]

 An object of the present invention is to enable quiet caulking work without requiring skill and effort.

[0004]

[Device configuration]

 A first invention is a reciprocating drive body that moves back and forth at a rear end portion of a tubular body, and a cam that is connected to a front end of the reciprocating drive body via a link and is rotatable around a pin as a fulcrum. The front end claw is pressed against the above cam by the rear end roller part, the front end claw can freely move in and out of the caulking recess at the front end of the body, and the middle part is supported by another pin. It has a return spring for returning and a return spring for constantly pressing the roller against the cam surface of the cam, and the cam surface has a shape to push up the roller when the reciprocating driving body advances. is there.

A second invention is the crimping device according to claim 1, wherein a handle having an activation switch is provided at an upper end of the body body.

According to a third aspect of the present invention, 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. The caulking device described in 1.

A fourth invention is the caulking device according to claim 1, wherein a spacer for adjusting the height of the bottom surface is detachably attached to the caulking recess.

[0008]

【Example】

 In FIG. 4, which shows the entire apparatus, the body 8, the cylinder 9, the cylinder head 10 (they form a tubular body), the handle 11, and the auxiliary handle 12 (which may be omitted) are all made of aluminum. It is made of Nume and is joined together. A caulking arm 14 is supported on the body body 8 via a pin 13, and a caulking recess 17 is formed by a claw 15 at the front end of the caulking arm 14 and a fixed cap portion 16 at the lower front end of the body body 8. An activation switch 18 (button) is provided on the front end portion of the upper surface of the handle 11 so that the handle 11 can be operated by the thumb of the right hand. When the start switch 18 is pressed, a start valve (not shown) opens, pressure air is supplied to the air inlet 19 via a rubber hose, and the mechanism 15 described later causes the pawl 15 to rotate in the direction of arrow A for caulking. Is to be done.

In FIG. 5 showing the longitudinal section of FIG. 4, the rear end of the cylinder 9 is screwed into the cylinder head 10 with an O-ring (not shown) that keeps airtightness with a screw portion 21, and the front end is Similarly, it is screwed to the body 8 at the neck portion 22. A piston 24 (reciprocating driving body) is slidably fitted in 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-like projection 26 is fixed to the center of the front surface of the piston 24 by a bolt 28, and a rear end of a pair of links 29 that sandwich the projection 26 is fixed to the projection 26 by a pin 30. Connected by. The front end portion of the link 29 sandwiches the outer peripheral portion of the fan-shaped flat plate cam 32 and is connected to the flat plate cam 32 by a pin 33. The cam 32 is supported by the body 8 via a pin 34, and has a cam surface 35, which is a part of a circle centered on a point O1 behind the pin 34, at its upper end. Reference numeral 36 denotes a return spring formed of a compression coil spring, which normally urges the piston 24 (when the pressure chamber 25 is not supplied with pressure air) to the rear end position shown in FIG. Keep the standby position.

A return spring 38, which is a compression coil spring, comes into contact with the lower surface of the caulking arm 14 slightly forward of the pin 13 and applies a moment indicated by an arrow B to the caulking arm 14, thereby causing the rear end portion of the caulking arm 14 to move. A roller 40 supported by a pin 39 at the bifurcated portion of the above is in pressure contact with the cam surface 35. Reference numeral 41 is a screw hole for attaching a spacer described later.

In FIG. 6 showing a part of the front surface of FIG. 5, 42 is a slit for properly supporting the cam 32 (FIG. 5), 43 is a hole for supporting the pin 34, and 44 is for caulking arm 14 properly. The supporting slit, 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 from both sides with a slight gap in the range of the height H1 in FIG. 5, and prevents the cam 32 from falling. The distance (lift) between the contact point P1 between the cam surface 35 and the roller 40 and the pin 34 increases toward the rear of the cam surface 35, but the biting angle α1 between the cam surface 35 and the roller 40 is kept constant. ..

The caulking recess 17 shown in FIG. 5 is fitted to the flange 3 and the bent piece 6 (where the corner piece 5 is fitted therein) of the duct body 1, and when the switch 18 is pushed down, pressure is applied from the air inlet 19. Pressurization 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 pivots forward around the pin 34, the caulking arm 14 pivots in the direction A around the pin 13, and the claw 15 crimps the bent piece 6 onto the corner piece 5 as 6a. To be crowded.

The thickness of the flange 3 and the corner piece 5 may be changed by the manufacturer, but as a countermeasure against this, the bottom surface of the caulking recess 17 is raised so that the depth of the caulking recess 17 can be changed. It is preferable to use the spacer 48 (FIGS. 7 to 9) for this purpose. The thickness H2 of the spacer main body portion 48a in FIG. 7 abuts on the bottom surface of the caulking recess 17 to raise the bottom surface by H2. Reference numeral 47 in FIG. 9 is a notch into which a bolt (not shown) screwed into the bolt hole 41 (FIG. 1) is fitted. The spacer 49 shown in 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 arcuate projection 52 is elastically fitted in the groove 53. The spacer 54 shown in FIG. 12 is attracted to the magnet 55 embedded in the body 8. A reciprocating drive body that is driven forward and backward by a motor may be used instead of the air piston 24 of FIG.

[0014]

[Effect of the device]

 According to the first invention, the caulking arm 14 with the cam 32 and the roller 40 can provide a large caulking force to the claw 15 portion, and the caulking work can be performed easily and quietly without requiring skill. become able to. Even if the handle 11 is not provided, the work can be performed by holding the portion of the cylinder 9 with both hands.

According to the second invention, the handle 11 can be operated simply by grasping it with the right hand, which facilitates the work and improves the efficiency.

According to the third invention, not only is the weight reduced as a whole to facilitate the operation, but also the cam 32 can be surely prevented from falling and the caulking force can be efficiently transmitted to the roller 40.

According to the fourth invention, the device of the first invention can be effectively used even when the thickness of the corner pieces 5 and the like is changed by the manufacturer.

[Brief description of drawings]

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

FIG. 2 is a partially cross-sectional perspective view showing a state in which a corner piece is fitted.

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

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

FIG. 5 is a vertical sectional view.

FIG. 6 is a partial front view of FIG.

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 yet another spacer.

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

[Explanation of symbols]

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

Claims (4)

[Scope of utility model registration request] 1. A reciprocating drive member that moves back and forth at a rear end portion of a tubular body, a cam that is connected to a front end of the reciprocating drive member through a link and is rotatable around a pin as a fulcrum, and the cam. In addition, the claw at the front end is pressed into contact with the roller at the rear end, the claw at the front end can freely move in and out of the caulking recess at the front end of the body, and the intermediate part is supported by another pin. And a return spring that constantly presses the roller against the cam surface of the cam, and the cam surface has a shape that pushes up the roller when the reciprocating driving body advances. 2. The caulking device according to claim 1, further comprising a handle having a start 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.