JPH0728802U - Box motion type heat sealing device - Google Patents

Abstract

(57) [Abstract] [Purpose] To improve the sealing efficiency in a box motion type sealing device. [Structure] The frame 22 is formed by the reciprocating motion of the rod 23.
Reciprocates along the guide rail 21 in the same direction as the traveling direction of the tube film 25. On the other hand, the frame 2
Rotational power in both forward and reverse directions of the servo motor 44 supported by 2 is transmitted to the main shaft 28 via the gears 45 and 46, the bell crank 29 is reversed, and the reverse power is linked to the links 37 and 3.
8 is transmitted to the upper and lower seal bars 41, 42, the pair of seal bars 41, 42 is connected to the tube film 2
5 is clamped and welded. By adjusting the rotation angle of the servo motor 44 by the rotation angle adjusting means incorporated in the controller 47, the separation distance between the pair of seal bars 41, 72 can be set so as to correspond to the thickness of the article to be packaged 52. As a result, wasteful movement of the seal bar is eliminated and efficiency is improved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a so-called box-motion type heat-sealing device which maintains a heating time for a packaging material having inferior welding conditions to some extent and rotates a pair of upper and lower seal bars along an elliptical orbit.

[0002]

[Prior art]

 As shown in FIG. 4, a pair of seal bars 3 and 4 provided on the upper and lower sides of a tube film 2 in which the article to be packaged 1 is arranged at equal intervals and moves in one direction are arranged within a certain range 5 within the predetermined range. In the conventional box motion type seal device which reciprocates at the same speed as 2 and causes both seal bars 3 and 4 to approach each other, the rotation of the groove cam 6 causes the lever 7 to oscillate 8 and the oscillating motion 8 It is transmitted to the bell crank 11 via 9 and 10 and the movements of both ends of the bell crank 11 are transmitted to the both seal bars 3 and 4 via the links 12 and 13.

[0003]

[Means for solving the problem]

 However, the rotation angle of the bell crank 11 in the above device is regulated by the swinging angle of the lever 7, and in the object 1 having an extremely large height, it passes between the seal bars 3 and 4. However, if the gap between the two sealing halves 3 and 4 is set to a large value, the problem is that the momentum of the seal bar is large and the efficiency is generally lowered.

[0004]

[Means for Solving the Problems]

 Therefore, in order to prevent the efficiency of the sealing work from decreasing, the present invention supports the main shaft supported along the guide rail 21 and erected between both walls of the portal frame which reciprocates along the guide rail. The bell cranks 29 fixed to both ends of the bell 28 are respectively connected to both ends of the bell cranks and both ends of a pair of upper and lower seal bars 41 and 42 supported between both walls of the gate frame through links 37 and 38, respectively. Further, in the sealing device in which the upper and lower seal bars 41 and 42 are brought close to each other to squeeze the packaging material by reversing the main shaft 28, the main shaft 28 and the gate are used as means for reversing the main shaft. A servo motor 44 fixed to the mold frame 22 is connected via power transmission mechanisms 45 and 46, a control device 47 is connected to the servo motor 44, and the control device is further connected. , The rotation direction switching means 48 of the motor, the speed adjustment means 52, 53 of the motor, constitutes a rotation angle adjusting means 54 of the motor Te respectively set ON.

[0005]

[Action]

 The rotation direction switching means 48 of the motor incorporated in the control device 47 controls the rotation direction of the servo motor 44 at a constant time interval and reverses the bell crank 29 via the main shaft 28. A pair of upper and lower seal bars 41 and 42 connected via the contact and contact with each other in association with the reciprocating movement of the gate-shaped frame 22. Further, the separation angle between the seal bars 41 and 42 can be adjusted by the rotation angle adjusting means 54 of the motor incorporated in the control device according to the thickness of the packaged article passing between the seal bars, By using the motor speed adjusting means 52 and 53 together, the rotation speed of the servo motor can be accelerated.

[0006]

【Example】

 As shown in FIG. 1 and FIG. 2, the lower end of the gate-shaped frame 22 is supported by the two guide rails 21 provided in parallel on the base 20, and the reciprocating motion 24 transmitted through the rod 23 The frame 22 is reciprocated along the guide rail 21. The speed at this time is the same as that of the tube film 25 moving in the frame 22.

A main shaft 28 is rotatably supported via a bearing 27 between both side walls 26 at a lower portion of the frame, and bell cranks 29 are fixed to both ends of the main shaft, respectively. Further, both ends of a pair of upper and lower bridge members 31 and 32 are slidably supported in slits 30 formed in both walls of the frame, and pins 33 and 34 at both ends of these bridge members and pins 35 and 35 at both ends of the bell crank 29, respectively. 36 is engaged via links 37 and 38, respectively, while an upper seal bar 41 is provided at the tip of a piston rod 40 of a cushion cylinder 39 fixed to the upper part of the upper bridge 31, and an upper surface of the lower bridge 32. A lower seal bar 42 is installed on each of them, and a servomotor 44 installed on the frame 22 via a bracket 43 and the main shaft 28 are engaged with each other via a pair of gears 45 and 46. Therefore, when the main shaft 28 is rotated in both forward and reverse directions by the rotational power of the servomotor 44 and both ends of the bell crank 29 are swung, the upper and lower seal bars 41 and 42 are displaced in opposite directions, and when they approach each other, The tube film 25 is pressed and heated by the seal bars 41 and 42.

A controller 47 controls the servo motor 44, and the controller is provided with various means as shown in FIG. That is, since the switching means 48 switches between the forward rotation means 49 and the reverse rotation means 50, the shaft 51 of the servomotor 44 rotates alternately in both forward and reverse directions. The speed adjusting means 52 and 53 adjust the rotation speed of the shaft 51 in both directions, and the rotation angle adjusting means 54 adjusts the rotation angle of the shaft 51. Therefore, the upper and lower seal bars correspond to the thickness of the article 55 to be packaged in FIG. The separation distance of 41 and 42 can be set.

[0009]

【effect】

 According to the present invention, a motor rotation angle adjusting means is incorporated in a controller of a servomotor 44 that operates a pair of upper and lower seal bars 41 and 42 so that the seal bars are separated from each other. Compared to the one in which the separation distance between the seal bars is constant due to the diameter of the groove cam, wasteful separation of the seal bars is eliminated and the efficiency is improved, and the speed adjusting means adjusts the approaching or separating speed of both seal bars according to the situation. Since the sealing time in one cycle can be set longer and the number of cycles can be increased accordingly, the efficiency can be improved.

[Brief description of drawings]

FIG. 1 Side view of the device

FIG. 2 is a front view of the device.

FIG. 3 is an explanatory diagram of various means incorporated in the control device.

FIG. 4 is an explanatory diagram of a conventional example.

[Explanation of symbols]

21 ... Guide rail 22 ... Portal frame 28 ... Spindle 29 ... Bell crank 41 ... Upper seal bar 42 ... Lower seal bar 44 ... Servo motor 47 ... Controller.

Claims (1)

[Scope of utility model registration request] 1. A bell crank 29 fixed to both ends of a main shaft 28 supported along a guide rail 21 and erected between both walls of a portal frame reciprocating along the guide rail, respectively. A pair of upper and lower seal bars 4 supported between both ends of both bell cranks and both walls of the gate frame.
In a sealing device in which both ends of 1, 42 are connected via links 37, 38, respectively, and by reversing the main shaft 28, the upper and lower seal bars 41, 42 are brought close to each other to heat the packaging material by pinching. As means for reversing the main shaft, the main shaft 28 and the servomotor 44 fixed to the gate frame 22 are connected via power transmission mechanisms 45 and 46, and a controller 47 is connected to the servomotor 44. Further, a box motion type heat seal characterized in that a motor rotation direction switching means 48, a motor speed adjusting means 52 and 53, and a motor rotation angle adjusting means 54 are incorporated in the control device, respectively. apparatus.