Hot pressing button assembly device

Abstract

The present invention provides a hot compression button assembly device capable of automatically adjusting the stroke of a first die corresponding to a pressing height that varies according to the type of button, etc. The present invention relates to a hot compression button assembly device for assembling a button by pressing a resin shell onto a metal button body. The hot compression button assembly device includes: a first die including a punch for pressing an annular protrusion of the shell; an elbow mechanism for moving the first die between an initial position and a pressing position; a servo motor, which is a power source of the elbow mechanism; a heater for heating the punch; and a control unit, which controls the rotation angle of the servo motor so that the elbow mechanism moves the first die to the pressing position. The pressing position corresponds to the pressing height of each of a plurality of buttons that have been input into the control unit in advance.

Description

Technical Field

[0001] The invention relates to a hot-pressing button assembly device, in particular to a hot-pressing button assembly device for pressing a resin shell onto a metal button body to assemble the button. Background Art

[0002] There is known a buckle in which a resin shell (also called a housing) is pressed against a metal buckle body to be assembled into one piece. Figure 1 to Figure 3 , an example of such a button is described. The metal button body 1 includes: a base 2, which is in the shape of a circular plate, a polygonal plate, etc.; and a shaft 3, which extends upward from the base 2 (up and down based on Figure 1 to Figure 3 The shaft portion 3 is hollow cylindrical or solid. The resin shell 4 includes: a base 5, which is in the shape of a circular plate, a polygonal plate, etc.; and an annular protrusion 6, which protrudes upward from the base 5. The protruding length of the annular protrusion 6 is designed to exceed the thickness of the base 2 of the button body 1. The outer diameter of the annular protrusion 6 gradually decreases upward. The inner diameter of the annular protrusion 6 is approximately fixed and is designed to be slightly larger than the outer diameter of the base 2 of the button body 1.

[0003] In order to integrate the button body 1 and the shell 4, Figure 2 As shown in FIG. 1 , the button body 1 and the shell 4 are placed on the lower die in a state where the button body 1 is arranged with the base 2 facing downward on the radial inner side of the annular protrusion 6 on the upper surface of the shell 4. Next, the annular protrusion 6 of the shell 4 is pressed against the base 2 of the button body 1 by a pressing punch (not shown) of the upper die. Thus, the button 7 (see FIG. 1 ) is completed. Figure 3 ). In addition, the punch is heated by a heater, and the annular protrusion 6 is pressed while being heated. Figure 3 The height (t1) of the shell 4 after being pressed against the button body 1, that is, the height (t1) of the annular protrusion 6 after being pressed from the lowest end of the base 5 (the lower surface of the base 5 in the shell 4) is called the "pressing height" t1. The pressing height t1 is a value specific to the button 7. The "pressing height" varies depending on the type or size of the button (button body or shell). For example, Figure 4 The pressing height t2 of the button 8 shown, which is different from the button 7, is slightly larger than t1. The button 8 includes a button body 1 shared with the button 7 and a shell 4a that is slightly thicker than the shell 4. The shell 4a includes a base 5a and an annular protrusion 6a, and the lower surface of the base 5a is a curved surface protruding downward. The pressing height t2 of the button 8 is the height of the annular protrusion 6 after pressing from the lower end of the base 5a (the center of the lower surface). With respect to fabrics such as clothes, buttons 7 and 8 are installed on the fabric by having the shaft 3 penetrate from one side of the fabric to the other side and then connect to a button stopper applied from the other side of the fabric.

[0004] The existing hot pressing button assembly device comprises: an upper die, which includes a punch for pressing; a lower die, which carries Figure 2 a button body and shell in a state; a crank pressure mechanism, which is used to move the upper mold to the clamping position; a three-phase induction motor, which is the power source of the crank pressure mechanism; and a heater, which is used to heat the punch. The clamping position of the upper mold is the position where the punch reaches the clamping height of a certain button. In the existing hot compression button assembly device, the operator manually adjusts the stroke to the clamping position of the upper mold according to the type or size of the button. In addition, another example of an existing compression button assembly device is disclosed in Japanese Patent Publication No. 7-268710 (Patent Document 1).

[0005] In the existing hot-pressing button assembly device, the operator manually adjusts the stroke of the upper die so that the upper die stops at a clamping position corresponding to the clamping height that varies according to the type or size of the button, which is very troublesome. For example, after the assembly operation of a certain button is completed and another button is assembled, a new stroke adjustment is required. In addition, at this time, if there is residual heat on the punch, the operator may be burned and needs to wait until the temperature of the punch drops. Moreover, in the existing hot-pressing button assembly device, it is impossible to stop the upper die at a clamping position corresponding to the clamping height, and the heating temperature of the punch cannot be controlled, and the temperature of the punch is essentially fixed. Therefore, if the clamping of the shell by the punch is completed once, it will cause the shell to not be fully clamped or a part of the shell to be burnt. Therefore, in the prior art, the clamping of the shell by the punch is divided into multiple times.

[0006] Prior art literature

[0007] Patent Literature

[0008] Patent Document 1: Japanese Patent Application Laid-Open No. 7-268710 Summary of the invention

[0009] The present invention is made in view of the above-mentioned problems, and its purpose is to provide a hot pressing button assembly device that can automatically adjust the stroke of the first die corresponding to the pressing height that varies according to the type of button, etc. In addition, another purpose of the present invention is to provide a hot pressing button assembly device that can complete the pressing by the punch once.

[0010] In order to solve the above-mentioned problem, according to one aspect of the present invention, there is provided a hot compression button assembly device, which is used to compress a resin shell onto a metal button body to assemble a button, and the hot compression button assembly device is characterized in that it includes: a first mold, which includes a punch for compressing the annular protrusion of the shell; an elbow mechanism, which is used to move the first mold between an initial position and a pressing position; a servo motor, which is a power source of the elbow mechanism; a heater, which is used to heat the punch; and a control unit, which controls the rotation angle of the servo motor so that the elbow mechanism moves the first mold to the pressing position, and the pressing position corresponds to the pressing height of each of a plurality of buttons input into the control unit in advance.

[0011] In the present invention, the button body is formed of aluminum alloy, copper alloy, stainless steel, etc., but not limited thereto. In addition, the shell is formed of thermoplastic resins such as nylon, polyacetal, polyamide, polypropylene, polybutylene terephthalate, etc., but not limited thereto.

[0012] In the present invention, a plurality of pressing heights corresponding to the types of buttons are input in advance to the control unit. The control unit controls the rotation angle of the servo motor so that the toggle mechanism moves the first die from the initial position to the designated position of the pressing height corresponding to the button, i.e., the pressing position. Thus, the stroke of the first die corresponding to the pressing heights that differ according to the types of buttons can be automatically adjusted.

[0013] In one embodiment of the present invention, the control unit stops the servo motor at the rotation angle corresponding to the clamping position for a predetermined time from the moment when the servo motor reaches the rotation angle corresponding to the clamping position. The clamping time corresponding to the type of button, i.e., the time when the punch of the first die stops at the clamping position, can be input to the control unit in advance. Thus, the optimal clamping time can be set according to the type of button, etc.

[0014] In one embodiment of the present invention, the control unit controls the servo motor so that the first die is decelerated as it moves toward the pressing position immediately before the first die contacts the housing. By decelerating the first die, the punch of the first die reaches the pressing position while hot pressing the annular convex portion of the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a side view showing the button body and the shell in a separated state.

[0016] Figure 2 It is a cross-sectional view showing a state where the button body is arranged on the housing.

[0017] Figure 3This is a cross-sectional view showing a state in which the button is assembled by pressing the shell onto the button body.

[0018] Figure 4 It means the other button. Figure 3 Same cross-section.

[0019] Figure 5 It is a side view showing a heat compression button assembly device according to one embodiment of the present invention.

[0020] Figure 6 It is a block diagram showing the control structure of the heat-pressing button assembly device.

[0021] Figure 7 It is a flowchart showing the assembly process of a button.

[0022] Figure 8 It is a side view of the heat-compression button assembly device showing the moment just before the punch contacts the upper end of the annular protrusion of the shell.

[0023] Fig. 9 yes Figure 8 An enlarged view of the vicinity of the button before assembly.

[0024] Fig.10 It is a side view of the heat-pressing button assembly device showing the moment when the punch reaches the pressing position.

[0025] Fig.11 yes Fig.10 The moment of Fig. 9 The same enlarged image.

[0026] Fig.12 It means the upper die is from Fig.11 The state of the lower die rising and the state of the lower die moving to the upper position Fig. 9 The same enlarged image.

[0027] Fig.13 A top view schematically showing a turntable for transporting shells, button bodies, etc.

[0028] Description of Reference Numerals

[0029] 1 Button body

[0030] 2 Base

[0031] 3. Axis

[0032] 4.4a Shell

[0033] 5.5a Base of the housing

[0034] 6, 6a Annular convex part

[0035] 7, 8 buttons

[0036] 10 Upper die (1st die)

[0037] 11 Punch

[0038] 12 Punch holding part

[0039] 20 Lower die (second die)

[0040] 21 Die

[0041] 22 Base

[0042] 30 Toggle mechanism

[0043] 40 Servo motor

[0044] 41 Rotor

[0045] 50 Band heater (heater)

[0046] 60 Control Department

[0047] 100 Hot pressing button assembly device

[0048] 200 Turntable

[0049] 201 board

[0050] 202 Hole

[0051] 210 Processing Department

[0052] 211 Discharge unit

[0053] 212 Shell supply unit

[0054] 213 Button body supply unit

[0055] t1, t2 clamping height DETAILED DESCRIPTION

[0056] Hereinafter, an embodiment of the present invention will be described based on the drawings, but the present invention is not limited to the above-described embodiment, and appropriate changes and the like can be made within the scope of the claims and the scope of equivalents. Figure 5 1 is a side view of a heat-pressing button assembly device (hereinafter also referred to as a "button assembly device") 100 according to an embodiment of the present invention. Figure 5 In addition, Figure 3 and Figure 4The buttons 7 and 8 shown are only an example of buttons assembled by the button assembly device 100, and the button assembly device 100 can assemble a variety of buttons having different pressing heights from the buttons 7 and 8. The button assembly device 100 includes: an upper mold 10 as a first mold; a lower mold 20 as a second mold; an elbow mechanism 30 for moving the upper mold 10 between an initial position and a pressing position; a servo motor 40, which is a power source of the elbow mechanism 30; a belt heater 50, which is an example of a heater for heating the punch 11 of the upper mold 10 described later; and a control unit 60, which controls the rotation angle of the servo motor 40, etc. (refer to Figure 6 ).

[0057] The upper die 10 includes a punch 11 for pressing and a punch holder 12 connected to the upper end of the punch 11. The punch 11 and the punch holder 12 are substantially cylindrical (or cylindrical) in shape and are concentrically connected to each other. The upper die 10 is moved up and down along the axis of the upper die 10 (punch 11 and punch holder 12) by an elbow mechanism 30. The lower die 20 includes a die 21 and a cylindrical base 22 surrounding the die 21. The base 22 is mounted on a turntable 200 (see FIG. 20 ) described later. Fig.13 ) of the lower plate, the upper surface of the base 22 and the upper surface of the lower plate are located in the same plane. The die 21 can always be in a lower position relative to the base 22 in a stationary state (refer to Fig. 9 and Fig.11 ) and the upper position (refer to Fig.12 ) are raised and lowered between the punch 11 and the tape heater 50 is wound around the punch 11. The power supply 51 heats the tape heater 50 through the cable 52. In addition, the area around the punch 11 can be concave in an amount corresponding to the wound tape heater 50. Fig. 9 As shown in an enlarged manner, a recessed portion 11 a for receiving the shaft portion 3 of the button body 1 and pressing the annular protrusion 6 of the housing 4 is provided at the lower end portion of the punch 11 .

[0058] The elbow mechanism 30 includes a first link 31, a second link 32, and a third link 33. One end of each of the first to third links 31, 32, 33 is pivotally connected to a first movable shaft 34. The other end 31a of the first link 31 is pivotally connected to a fixed shaft 35 fixed to an upper portion along the axis of the upper die 10. The other end 32a of the second link 32 is pivotally connected to a second movable shaft 36 fixed to an upper end of the punch holding portion 12 of the upper die 10. The second movable shaft 36 moves up and down along the axis of the upper die 10. The other end 33a of the third link 33 is pivotally connected to a third movable shaft 37 fixed to the vicinity of the outer periphery of the rotor 41 of the servo motor 40. The position of the fixed shaft 35 does not change. On the other hand, the positions of the first to third movable shafts 34 , 36 , 37 change as the rotor 41 of the servo motor 40 rotates in the forward (counterclockwise) and reverse (clockwise) directions, whereby the toggle mechanism 30 lowers and raises the upper mold 10 .

[0059] Reference Figure 6 The control unit 60 controls the rotation angle of the rotor 41 of the servo motor 40 and the time for the rotor 41 to stop at a certain rotation angle from the moment the rotor 41 reaches the certain rotation angle via the motor driving unit (servo amplifier) ​​61. In addition, the control unit 60 can also control the temperature of the belt heater 50 via the heater driving unit 62. In addition, it is also possible that the control unit 60 does not control the temperature of the belt heater 50, but keeps it at a fixed temperature at all times. The pressing height tx of the button is set in advance according to the type or size of the button (button body or shell). For example, in Figure 3 The button 7 shown is t1, Figure 4 In the button 8 shown, t2 is slightly larger than t1. A plurality of pressing heights tx (t1, t2, etc.) are input and stored in advance in the storage unit 63 of the control unit 60. The stop time (pressing time) of the rotor 41 at a certain rotation angle and the temperature of the belt heater 50 set according to each button or pressing height are also input and stored in advance in the storage unit 63 of the control unit 60.

[0060] The calculation unit 64 of the control unit 60 calculates the rotation angle of the servo motor 40 corresponding to the value of the pressing height corresponding to the specific button specified by the operator, and rotates the rotor 41 of the servo motor 40 by the rotation angle based on the calculated value via the motor driving unit 51. Then, the control unit 60 stops the rotor 41 at the rotation angle position for a predetermined time (pressing time). Furthermore, the control unit 60 heats the belt heater 50 via the heater driving unit 62 to a temperature corresponding to the specific button specified by the operator.

[0061] Next, with button 7 (refer to Figure 3 ) as an example, the button assembly process of the hot pressing button assembly device 100 is explained. Figure 7 It is a flowchart showing the assembly process of a button. Figure 8 1 is a side view of the heat-compression button assembly device 100 showing a moment immediately before the punch 11 comes into contact with the upper end of the annular projection 6 of the housing 4 . Fig. 9 yes Figure 8 An enlarged view of the vicinity of the button 7 before assembly at the moment of Fig.10 1 is a side view of the heat-pressing button assembling device 100 showing the moment when the punch 11 reaches the pressing height t1 of the button 7 . Fig.11 yes Fig.10 An enlarged view of the vicinity of button 7 at the moment of

[0062] Figure 5 1 shows the initial state of the button assembly device 100. In this initial state, the servo motor 40 is not driven, and the upper mold 10 is located at the initial position. In addition, in this initial state, the punch 21 of the lower mold 20 is located at the lower position (refer to Fig. 9 etc.), a die 21 is placed on the die 21. Figure 2 The button 7 before assembly is shown in the state shown. The operator specifies the button 7 (or its pressing height t1) using an input device such as a touch panel (not shown). In response, the control unit 60 heats the belt heater 50 of the upper mold 10 to a specified temperature corresponding to the button 7, for example, 200°C to 300°C. When the operator presses the start button, the control unit 60 causes the rotor 41 of the servo motor 40 to rotate from Figure 5 The button 7 is rotated counterclockwise (positively) by an angle ( Figure 7 At the same time, the first movable shaft 34 of the elbow mechanism 30 approaches the axis of the upper die 10, and the second movable shaft 36 moves downward. As a result, the upper die 10 descends and the punch 11 stops at Fig.10 and Fig.11 The pressing position ( Figure 7 of S2).

[0063] exist Figure 8 and Fig. 9 As shown, before the upper die 10 is about to stop, the lowering speed of the upper die 10 is decelerated from the moment before the punch 11 is about to contact the upper end of the annular protrusion 6 of the housing 4 until it stops at the clamping position ( Figure 7 The deceleration is performed by the control unit 60 causing the rotation speed of the rotor 41 of the servo motor 40 to be decelerated. In addition, the rotation speed or deceleration of the servo motor 40 is set in advance and input to the storage unit 63 of the control unit 60. As a result, the punch 11 is decelerated. Figure 8 and Fig. 9From the moment of the heating, the annular protrusion 6 of the shell 4 begins to be pressed. Fig.10 and Fig.11 The upper mold 10 stops at the pressing position corresponding to the pressing height t1 of the button 7. The upper mold 10 stops at the pressing position for a preset pressing time ( Figure 7 S3). At this time, the punch 11 of the upper die 10 continues to press the annular protrusion 6 of the shell 4 during the pressing time, thereby continuing the heating and pressing force of the punch 11 on the annular protrusion 6 for the pressing time. In the button assembly device 100, the force of the servo motor 40 can be increased by the elbow mechanism 30. Thus, the smaller power from the servo motor 40 can be increased by the elbow mechanism 30, and the appropriate force can be continuously applied from the punch 11 of the upper die 10 to the annular protrusion 6 of the shell 4. Thus, the annular protrusion 6 of the shell 4 is reliably pressed against the base 2 of the button body 1, thereby completing the button 7. In the above example, the control unit 60 controls the temperature of the belt heater 50, but it is also possible not to perform such temperature control and to maintain the temperature of the belt heater 50 fixedly at, for example, 200°C to 300°C.

[0064] After the punch 11 stops at the clamping position for a predetermined time, the control unit 60 rotates the rotor 41 of the servo motor 40 in the clockwise direction (reverse direction), thereby returning the upper die 10 to the original position. Figure 5 The initial position ( Figure 7 At the same time, the punch 21 of the lower die 20 moves from the lower position to the upper position (refer to S4). Fig.12 ) moves. As a result, the upper surface of the die 21 is located at the same upper and lower positions as the upper surface of the base 22 (and the lower plate of the turntable 200), and the button 7 after completion is moved by the upper plate 201 of the turntable 200 described later (refer to Fig.13 ) is transported to the discharge section 211.

[0065] Fig.13 1 is a top view schematically showing a turntable 200 for conveying the housing 4, the button body 1, etc. The turntable 200 includes an upper plate 201 and a lower plate (not shown) each having a circular shape. As an example, eight holes 202 are provided at 45-degree intervals on the upper plate 201. Fig.13 P1 to P8 in the figure are symbols for indicating the positions in the circumferential direction of the turntable 200. The upper plate 201 intermittently rotates 45 degrees in the clockwise direction, and the eight holes 202 intermittently move from the positions corresponding to the positions P1 to P8 in the clockwise direction to the adjacent next positions P1 to P8. The lower plate is always in a stationary state. Thus, the housing 4, the button body 1, the button 7, etc. arranged in the hole 202 can be slid on the lower plate and transported.

[0066] At position P1, a processing section 210 is provided in which a hot pressing button assembly device 100 is arranged. In addition, at position P3, a discharge section 211 is provided for discharging the completed button 7 from the hole 202. A plurality of component supply sections are provided at positions P5 to P8. As an example of a plurality of component supply sections, a shell supply section 212 is provided at position P5, and a button body supply section 213 is provided at position P6. Focusing on one hole 202 of the upper plate 201, the hole 202 receives the shell 4 at the shell supply section 212 at position P5, and then receives the button body 1 from the button body supply section 213 at position P6. At this moment, the hole 202 is provided with a shell 4 at the shell supply section 212 at position P5, and then receives the button body 1 from the button body supply section 213 at position P6. Figure 2 Next, when the hole 202 reaches the processing portion 210 at the position P1, the button assembly device 100 presses the annular protrusion 6 of the shell 4 against the base 2 of the button body 1 as described above to assemble the button 7. When the hole 202 containing the button body 1 and the shell 4 reaches the processing portion 210 at the position P1, the punch 21 of the lower die 20 is located at the lower position (refer to Fig. 9 and Fig.11 ). After button 7 is completed Figure 7 At the moment of S4, the punch 21 of the lower die 20 moves to the upper position (refer to Fig.12 ), the upper surfaces of the die 21 and the base 22 are in the same vertical position, which is the same vertical position as the upper surface of the lower plate of the turntable 200. As a result, when the upper plate 201 is rotated, the button 7 located in the hole 202 of the upper plate 201 moves together with the upper plate 201. Then, the discharge portion 211 at the position P3 is discharged from the hole 202.

Claims

1. A hot pressing button assembly device, used for pressing a resin shell (4, 4a) onto a metal button body (1) to assemble a button (7, 8), the hot pressing button assembly device (100) comprising: a first die (10) comprising a punch (11) for pressing the annular convex portion (6, 6a) of the housing (4, 4a); An elbow mechanism (30) for moving the first mold (10) between an initial position and a clamping position; a servo motor (40) which is a power source of the toggle mechanism (30); a heater (50) for heating the punch (11); and a control unit (60) for controlling the rotation angle of the servo motor (40) so that the toggle mechanism (30) moves the first mold (10) to the clamping position, The pressing position corresponds to the pressing heights (t1, t2) of the respective buttons (7, 8) input into the control unit (60) in advance, The control unit (60) controls the servo motor (40) so that the first die (10) is decelerated as it moves toward the pressing position immediately before it contacts the housing (4, 4a). The control unit (60) also inputs and stores in advance the stop time of the servo motor (40) at the position of the rotation angle corresponding to the pressing height (t1, t2) and the temperature of the heater (50).

2. The hot pressing button assembly device according to claim 1, characterized in that: The control unit (60) stops the servo motor (40) at the rotation angle corresponding to the pressing position for a predetermined time from the time when the servo motor (40) reaches the rotation angle corresponding to the pressing position.

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