JPS5854652B2 - Machine for applying heat welding tape, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a machine for applying heat-welding tape, etc., which is used for adhering heat-welding joint tape, etc., to the joints of architectural boards and other construction areas.

The construction equipment used for the above purpose uses a halogen lamp, an infrared lamp, etc. as a heat source because it is necessary to melt the heat-melting synthetic resin adhesive attached to the tape. A method that directly irradiates the hot rays to the outside through a number of holes opened in the bottom of the lamp house of the construction machine, and melts the resin attached to the tape while holding down the tape surface with the bottom of the lamp house, and then adheres it to a board, etc. It is.

Construction machines use temperature control devices to suppress temperature increases during use, and thermocouples, thermistors, etc. are used as temperature sensors to detect the temperature.

By the way, the temperature distribution at the bottom of the lamp house of the construction machine is determined by the arrangement and shape of the heat source, and the temperature distribution at the bottom is not uniform.Therefore, depending on the setting of the temperature detection position, there is a significant difference in the responsiveness of turning on and off the heating lamp. will arise.

Therefore, the present invention measures the temperature distribution at the bottom of the lamp house of the construction machine, selects a point where the rising slope of temperature change is steep, and installs a temperature sensor at that position to prevent temperature fluctuations during use. It is characterized by preventing overheating when not in use.

Embodiments of the present invention will be described below with reference to the drawings.

In Fig. 1, a heat-generating lamp 2 such as a halogen lamp or an infrared lamp is built into a lamp house 1 of the construction machine body made of a material with high thermal conductivity such as a copper alloy, and a large number of heat-generating lamps 2 such as halogen lamps or infrared lamps are built into the bottom plate 3 of the lamp house 1. The heat radiation hole 4 is opened.

A handle 6 made of synthetic resin or the like is attached to the upper surface of the lamp house 1 with bolts 5 through a heat insulating plate 13, and a knob T for turning on the power and adjusting the temperature is provided on the upper surface of the tip of the handle 6.

A housing 8 located at the rear of the lamp house 1 is provided integrally with the handle 6, and a heat generating lamp 2 is placed inside the housing 8.
0 control section 9 is built-in.

In addition, each heat radiation hole 4 opened in the bottom plate 3 of the lamp house 1
, 4......, as shown in Figure 3, the front surface of the tape is pressed uniformly as the construction machine moves by staggering the opening positions of the vertical and horizontal rows and opening them in a staggered manner. Also, the heat source of the heat generating lamp 2 irradiated from each heat radiation hole 4 is radiated evenly onto the tape.

Further, a heat ray reflecting film (layer) 10 is formed on the inner surface of the lamp house 1 except for the inner bottom surface of the bottom plate 3, so that the heat rays emitted from the heat generating lamp 2 are effectively irradiated toward the bottom plate 3.

Figure 4 shows the horizontal axis X on the surface of the bottom plate 3 of the lamp house 1.
-X and the vertical axis Y-Y show the temperature distribution when the heat generating lamp 2 is turned on.

The temperature of the bottom plate 3 of the lamp house 1 is naturally high at the center (and falls at the periphery), but a point where the temperature gradient rises sharply is selected, and the temperature sensor 11 is installed at this point.

If a U-shaped heating lamp is used as shown in the figure, and the lamp is supported at the rear of the lamp house, the temperature gradient at symmetrical positions on both sides of the rear of the bottom of the lamp house 1 will be large.
Therefore, the temperature sensor 11 will be installed at one of these points.

The position of the temperature sensor 11 is not necessarily set at the position shown in the drawings, and the installation position may be determined based on various conditions such as the shape of the bottom plate, the type and shape of the heating lamp, and the opening position of the hole.

In addition, when using the thermistor 11A as the temperature sensor 11, as shown in FIG. Insert 15 cm of cement on top of it.
etc. to block the influence of radiant heat from the heat generating lamp 2 and to enable direct detection of the temperature of the bottom plate 3.

When a thermocouple 11B is used as the temperature sensor 11, a recess 14 is formed at a specific location on the bottom plate 3, as shown in FIG. 5, and the thermocouple 11B is accommodated therein.

FIG. 6 shows the temperature control circuit.

That is, when the switch 7A is turned on by operating the knob 7, a signal is input to the pulse transformer 17 by the operation of the temperature control switch 16, and in response to the output, the triac 18 is started and the heat generating lamp is turned on.

When the temperature inside the lamp house 1 rises due to heat dissipation from the heat generating lamp 2 and reaches the set temperature set by the resistance value of the variable resistor 7B, the temperature sensor 11 operates and switches the contact of the temperature adjustment switch 16. (to pulse transformer 17)
The energization is stopped, the triac 18 is stopped, and the heating lamp 2 is turned off.

In addition, the switch 7 of the variable resistor 7B linked to the knob 7
A is a power switch for the control circuit. When this switch is off, the temperature sensor 11 is disconnected from the circuit, and the control circuit is in the state when the temperature drops, that is, the safety line is off. The input is stopped by the off signal, and the heat generating lamp 2, which is a load inserted in series with the triac 18, is turned off.

When the thermistor 11A is used as the temperature sensor 11 and has an insulating structure, the power transformer 19 and the pulse transformer 17 are unnecessary because they are released from power shock.

This control circuit is not limited to what is shown.

In short, the present invention selects a point where the rising slope of the temperature distribution of the bottom plate 3 of the lamp house 1 is steep and detects a temperature change at that position, so that when the bottom plate 3 is heated above the set temperature, it is immediately detected. Upon detection, heating by the heat generating lamp 2 is stopped, and when the temperature falls below the set temperature, heating by the heat generating lamp 2 is immediately started, improving its responsiveness.

Therefore, according to the present invention, when the temperature of the lamp house 1 rises above the set temperature during standby before construction work, the power supply to the heat generating lamp 2 is immediately stopped, and the bottom plate 3 is moved to the upper surface of the tape at the same time as the work starts. When the lamp house 1 is pressed down, the temperature drops and is immediately heated, and the lamp house 1 is kept at a constant temperature while the heat generating lamp 2 is repeatedly turned on and off during work, thereby preventing abnormal overheating of the construction machine.

Furthermore, the tape is irradiated with radiant heat directly from each of the radiation holes 4, 4, etc., and the tape is pressed down evenly on the parts of the bottom plate 3 where there are no holes, thereby making it possible to proceed with the work efficiently. It is something.

Of course, the present invention is not limited to the construction of tape,
Can be widely used for construction of general heat-welded parts.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing one embodiment of the construction machine of the present invention, Fig. 2 is a vertical cross-sectional view, Fig. 3 is a bottom view, Fig. 4 is a temperature distribution diagram, and Fig. 5 (a) shows a temperature sensor. FIG. 6 is an enlarged sectional view showing the structure of the installed portion and a control circuit diagram. 1...Lamp, 2...Heating unit, 3...Bottom plate, 4...Heat radiation hole,
11.--Temperature sensor.

Claims (1)

[Claims] 1 A bottom plate that serves as a construction surface with a large number of heat radiation holes is provided in the Lang House housing the heat-generating lamp, and a temperature sensor is attached to the heat-generating lamp to detect temperature changes on the bottom plate and control switching of the heat-generating lamp on and off. The temperature sensor is installed on the bottom plate to thermally cut off the temperature, and the temperature sensor is installed at a point where the rising slope of the temperature distribution that occurs in the vertical and horizontal directions of the bottom plate is steep in relation to the shape and arrangement of the heat generating lamp. Construction machine for heat-welding tape, etc.