JPH0719111U - Electric heater of sealer for enclosing and packaging machine - Google Patents

Abstract

(57) [Summary] [Purpose] The electric wire for the electric heater, which is durable against repeated bending due to the repeated opening and closing of the sealer, is adopted to enable long-term continuous operation of the enclosing and packaging machine. [Structure] A heat-sealable packaging material such as a long thermoplastic film, which is folded in two in the width direction and is fed in the longitudinal direction, is electrothermally sealed by repeatedly opening and closing to form a sealed compartment. In the electric heater of the sealer for a sealing and packaging machine in which electric current is supplied to the electric resistance portion via the electric wire, the electric wire is composed of a stranded wire of a thin wire bundle.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electric heater for a sealer for an encapsulating packaging machine that encloses powder granules or the like in a heat-sealable packaging material such as a thermoplastic film.

[0002]

[Prior art]

 First, the horizontal encapsulating and packaging machine in which the electric heater of the sealer is generally used is outlined with reference to FIG. 4, and the elongated plastic film F supplied from the reel 31 is folded in two at the folding point 32 in the width direction. , A plurality of openable sealers 34, which are provided around the rotary table 33 at predetermined intervals, are sequentially formed into enclosed compartments for accommodating powder or the like in the longitudinal direction, and from the weighing plate 35 to the intermediate sheet. Powder is filled and supplied to the compartment via 35 a and the main chute 36. The compartment filled with the powder is separated from the table 33 by opening the sealer 34, and the upper opening edge is sealed and sealed by the lateral sealers 37, 37, and then suspended by the hangers 38, ... Is being separated into.

In general, the sealer 34 can swing up and down so that it can be opened and closed by a cam C with respect to a seal bar 34 a that is vertically installed and fixed on the rotary table 33 so as to receive the film F folded in two. The movable seal bar 34b is rotatably supported by the shaft, and the electrothermal heater is attached only to the fixed side seal bar 34a.

[0004]

[Problems to be solved by the device]

 Although it is desirable to provide an electric heater on both seal bars 34a, 34b for faster sealing, the movable seal bar 34b is repeatedly used to vertically seal to form a compartment in the folded film F 2. Since it is driven to open and close, even if a heater is provided, the conventional power supply wire is repeatedly bent and often breaks in a relatively early period, and the enclosing and packaging work is often interrupted. The present invention has been devised in view of the above-mentioned conventional problems, and employs a twisted wire of a thin wire bundle that is durable against repeated bending, and performs long-term continuous operation while performing high-speed sealing. The aim is to provide an electric heater for a sealer for an encapsulating packaging machine that enables the above.

[0005]

[Means for Solving the Problems]

 The electric heater of the sealer for an encapsulating and packaging machine of the present invention which achieves the above-mentioned object, sequentially opens and closes a heat-sealable packaging material such as a long thermoplastic film which is folded in two in the width direction and is fed in the longitudinal direction. In the electric heater of the sealer for the encapsulation packaging machine, in which electric current is supplied to the electric resistance part through the electric wire, the electric wire is composed of twisted wires of a thin wire bundle. It is characterized by being done.

[0006]

[Examples and functions]

 Hereinafter, the electric heater of the sealer for a sealing and packaging machine according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is an elevation view showing a state of an electric wire of an electric heater of a sealer for a sealing and packaging machine of the present invention in a closed state, FIG. 2 is an elevation view showing a state of an electric wire in the open state, and FIG. 3 is an arrow in FIG. It is an expanded sectional view along line of sight III-III.

1 and 2, a plurality of sealers 10 of the present invention used in a horizontal encapsulating and packaging machine as outlined in the section of the prior art are installed around a rotary table 33 of the prior art at predetermined intervals. Opening and closing is controlled by a fixed seal bar 11 which is fixed and has an electric heater 17, and a cam driven roller 12a which is pivotally supported in a vertical direction on a base 11a of the seal bar 11 and which engages with a groove cam C. The movable seal bar 12, a terminal block attached to the lower surface of the rotary table 33 to the connection terminal 13a of the heater 13 and the electric heater 13 of the heater 13 mounted near the seal surface side of the movable seal bar 12, for example. It is composed of an electric wire 14 which is connected from 33a and supplies electricity of 100 V × 1.5 A, for example.

The electric wire 14 is made up of 57 bundles of 0.08φ ultrafine wires, which are twisted into 7 bundles. Due to the flexibility of the ultrafine wires and the slippage between the wire bundles, the wire 14 is repeatedly bent. And exhibits excellent durability. The electric wire 14 is elastically supported by the coil spring 15a in the pipe piece 15 covering the heater connection terminal 13a as shown in FIG. It is intermediately supported by an electric wire fixture 33b attached to the lower surface. The L-shaped gentle curve of the intermediate portion 14b allows for a slack so that the electric wire 14 is not subjected to a large stress with respect to the movement of the movable seal bar 12. In addition, the nearby electric wire portion 14a elastically supported by the spring 15a also curves along the arc of the base corner 12b of the movable seal bar 12 in the open state, but the coil spring 15a is allowed to slide and cushion. It is speculated that the generation of large stress is prevented with the assistance of the.

[0009]

[Effect of device]

 As described above, according to the electric heater of the sealer for an encapsulating and packaging machine of the present invention, since the electric wire for feeding is composed of a twisted wire of a thin wire bundle, even if the wire is repeatedly bent by opening and closing the sealer, a small gap between the wire bundles is generated. The slide and the flexibility of the thin wire itself do not cause a large stress and can withstand long-term use, enabling high-speed continuous operation of the encapsulating and packaging machine for a long time.

[Brief description of drawings]

FIG. 1 is an elevational view showing a state of an electric wire in a closed state of an electric heater of a sealer for a sealing and packaging machine of the present invention.

FIG. 2 is an elevational view showing a state of the electric wire in the same opened state.

3 is an enlarged cross-sectional view taken along the line III-III in FIG.

FIG. 4 is an elevational view showing an appearance of a horizontal enclosing packaging machine.

[Explanation of symbols]

 10 Sealing and Sealing Machine 13 Electric Heater 13a Heater Power Supply Terminal 14 Electric Wire 15a Elastic Body (Coil Spring)

Claims (2)

[Scope of utility model registration request] 1. A sealed compartment is formed by electrothermally sealing a heat-sealable packaging material such as a long thermoplastic film that is folded in two in the width direction and is fed in the longitudinal direction and is repeatedly opened and closed. In the electric heater of the sealing and packaging machine sealer in which electric current is supplied to the electric resistance portion via the electric wire, the electric wire is composed of a stranded wire of a thin wire bundle, Electric heater. 2. The heater according to claim 1, wherein the electric wire is pressed and fixed by an elastic body such as a coil spring near a connecting portion to the electric resistance portion terminal for the heater.