Abstract: An electric vehicle includes a battery pack for driving the electric vehicle; and a vehicle body reinforcing structure member having at least a cross connection structure, wherein a left side and a right side of the vehicle body reinforcing structure member are fixed to a left side and a right side of a vehicle body respectively, and at least a portion of the vehicle body reinforcing structure member is fixed to the battery pack.

Abstract: Provided are a welding device and a welding method that can realize efficient welding in terms of time and in terms of energy. The embodiment includes: a first graphite heater 110 and a second graphite heater 120 that come into contact with a first member 210 and a second member 220; and a first die 130 and a second die 140 that interpose the first and second graphite heaters 110, 120 between each of the first and second members 210, 220 and each die. The first and second graphite heaters 110, 120 have graphite sheets 114, 124 that generate heat by electric power, insulating materials 113, 123, outer covers 111, 121, and inner covers 112, 122 and are configured such that structures of the graphite sheets 114, 124 and the insulating materials 113, 123 interposing the graphite sheets are interposed between outer covers 111, 121 and inner covers 112, 122.

Abstract: An inspection system is provided, which is capable of notifying a worker of a determination result immediately while preventing detection failure. The inspection system to inspect a tightening state of a bolt includes: a server device that determines quality of the tightening state of the bolt based on a degree of similarity of a shape of a tightening waveform that indicates a torque change with time when a worker tightens the bolt using a nutrunner to a shape of a reference waveform that indicates an ideal torque change with time when the bolt is tightened; and a notification device that notifies the worker of the quality of the tightening state of the bolt, which is determined by the server device.

Abstract: An inspection system is provided, which is capable of notifying a worker of a determination result immediately while preventing detection failure. The inspection system to inspect a tightening state of a bolt includes: a server device that determines quality of the tightening state of the bolt based on a degree of similarity of a shape of a tightening waveform that indicates a torque change with time when a worker tightens the bolt using a nutrunner to a shape of a reference waveform that indicates an ideal torque change with time when the bolt is tightened; and a notification device that notifies the worker of the quality of the tightening state of the bolt, which is determined by the server device.

Abstract: A screw fastening method includes reversely rotating a shaft part of a fastening tool in a direction of loosening one of an external thread and an internal thread, which is engaged with the shaft part, while one of the external thread in a non-screwed state and the internal thread in a non-screwed state, which is engaged with the shaft part, is pressed against the other thread, detecting collisions between thread ridges of the external thread and the internal thread using a sensor while the shaft part remains rotated reversely, determining whether or not a time interval between collisions detected by the sensor matches a theoretical cycle of collisions calculated from rotation speed of the shaft part, and fastening the external thread and the internal thread to each other by normally rotating the shaft part when it is determined that the time interval matches the theoretical cycle.

Abstract: A screw fastening method includes reversely rotating a shaft part of a fastening tool in a direction of loosening one of an external thread and an internal thread, which is engaged with the shaft part, while one of the external thread in a non-screwed state and the internal thread in a non-screwed state, which is engaged with the shaft part, is pressed against the other thread, detecting collisions between thread ridges of the external thread and the internal thread using a sensor while the shaft part remains rotated reversely, determining whether or not a time interval between collisions detected by the sensor matches a theoretical cycle of collisions calculated from rotation speed of the shaft part, and fastening the external thread and the internal thread to each other by normally rotating the shaft part when it is determined that the time interval matches the theoretical cycle.

Abstract: A constant-temperature piezoelectric oscillator includes: a piezoelectric vibrator; an oscillation circuit; a frequency voltage control circuit; a temperature control section; and an arithmetic circuit, wherein the temperature control section includes a temperature-sensitive element, a heating element, and a temperature control circuit, the frequency voltage control circuit includes a voltage-controlled capacitance circuit capable of varying the capacitance value in accordance with the voltage, and a compensation voltage generation circuit, and the arithmetic circuit makes the compensation voltage generation circuit generate a voltage for compensating a frequency deviation due to a temperature difference between zero temperature coefficient temperature Tp of the piezoelectric vibrator and setting temperature Tov of the temperature control section based on a frequency-temperature characteristic compensation amount approximate formula adapted to compensate the frequency deviation, and then applies the voltage t

Abstract: A piezoelectric oscillation circuit includes: a Colpitts oscillation circuit; a first circuit unit which includes a circuit having a variable-capacity capacitor for controlling an oscillation frequency; a second circuit unit which includes a circuit having a resistance; and a piezoelectric resonator which includes a first terminal connected to the first circuit unit and the second circuit unit, and a second terminal connected to the Colpitts oscillation circuit. The Colpitts oscillation circuit connects the second terminal to a fixed potential via a dividing resistance. The second circuit unit connects the first terminal to the fixed potential via the resistance.

Abstract: A constant-temperature piezoelectric oscillator includes: a piezoelectric vibrator; an oscillation circuit; a frequency voltage control circuit; a temperature control section; and an arithmetic circuit, wherein the temperature control section includes a temperature-sensitive element, a heating element, and a temperature control circuit, the frequency voltage control circuit includes a voltage-controlled capacitance circuit capable of varying the capacitance value in accordance with the voltage, and a compensation voltage generation circuit, and the arithmetic circuit makes the compensation voltage generation circuit generate a voltage for compensating a frequency deviation due to a temperature difference between zero temperature coefficient temperature Tp of the piezoelectric vibrator and setting temperature Tov of the temperature control section based on a frequency-temperature characteristic compensation amount approximate formula adapted to compensate the frequency deviation, and then applies the voltage t

Abstract: An image forming apparatus includes: a transport unit that transports a recording medium; a thermal transfer sheet that has an ink layer, and a protective material layer thermally transferred onto the recording medium to form a protective layer; a reforming sheet that has a printing opening portion for causing the ink layer and the protective material layer to come into contact with a surface of the recording medium, and a surface property reforming portion for reforming surface properties of the protective layer; and a thermal head that heats and causes the surface property reforming portion to come into pressing contact with the recording medium through the thermally transferred protective material layer, wherein a temperature limitation area is set in an outer peripheral portion of an area where the surface properties are reformed, and heating of the surface property reforming portion in the temperature limitation area is restricted.

Abstract: An image forming apparatus includes a conveyance unit conveying a medium to be recorded in a predetermined direction, a thermal transfer sheet including an ink layer thermally transferred onto the medium to form a printing layer, and a protective material layer thermally transferred onto the medium to form a protection layer, a transfer sheet traveling unit causing the thermal transfer sheet to travel, a reforming sheet including a printing opening for bringing the ink layer and the protective material layer into contact with a surface of the medium, and a surface property reforming unit reforming the surface property of the protection layer, a reforming sheet traveling unit causing the reforming sheet to travel, and a thermal head pressing the surface property reforming unit on the medium through the protective material layer having been thermally transferred to thereby heat the pressed surface property reforming unit.

Abstract: A piezoelectric oscillation circuit includes: a Colpitts oscillation circuit; a first circuit unit which includes a circuit having a variable-capacity capacitor for controlling an oscillation frequency; a second circuit unit which includes a circuit having a resistance; and a piezoelectric resonator which includes a first terminal connected to the first circuit unit and the second circuit unit, and a second terminal connected to the Colpitts oscillation circuit. The Colpitts oscillation circuit connects the second terminal to a fixed potential via a dividing resistance. The second circuit unit connects the first terminal to the fixed potential via the resistance.

Abstract: An image forming apparatus includes a conveyance unit conveying a medium to be recorded in a predetermined direction, a thermal transfer sheet including an ink layer thermally transferred onto the medium to form a printing layer, and a protective material layer thermally transferred onto the medium to form a protection layer, a transfer sheet traveling unit causing the thermal transfer sheet to travel, a reforming sheet including a printing opening for bringing the ink layer and the protective material layer into contact with a surface of the medium, and a surface property reforming unit reforming the surface property of the protection layer, a reforming sheet traveling unit causing the reforming sheet to travel, and a thermal head pressing the surface property reforming unit on the medium through the protective material layer having been thermally transferred to thereby heat the pressed surface property reforming unit.

Abstract: An image forming apparatus includes: a transport unit that transports a recording medium; a thermal transfer sheet that has an ink layer, and a protective material layer thermally transferred onto the recording medium to form a protective layer; a reforming sheet that has a printing opening portion for causing the ink layer and the protective material layer to come into contact with a surface of the recording medium, and a surface property reforming portion for reforming surface properties of the protective layer; and a thermal head that heats and causes the surface property reforming portion to come into pressing contact with the recording medium through the thermally transferred protective material layer, wherein a temperature limitation area is set in an outer peripheral portion of an area where the surface properties are reformed, and heating of the surface property reforming portion in the temperature limitation area is restricted.

Abstract: A constant-temperature piezoelectric oscillator includes: a piezoelectric vibrator; an oscillation circuit; a frequency voltage control circuit; a temperature control section; and an arithmetic circuit, wherein the temperature control section includes a temperature-sensitive element, a heating element, and a temperature control circuit, the frequency voltage control circuit includes a voltage-controlled capacitance circuit capable of varying the capacitance value in accordance with the voltage, and a compensation voltage generation circuit, and the arithmetic circuit makes the compensation voltage generation circuit generate a voltage for compensating a frequency deviation due to a temperature difference between zero temperature coefficient temperature Tp of the piezoelectric vibrator and setting temperature Tov of the temperature control section based on a frequency-temperature characteristic compensation amount approximate formula adapted to compensate the frequency deviation, and then applies the voltage t

Abstract: An image printing apparatus includes a lottery drawing unit that draws a lottery on the basis of data included in image data to be printed; a maximum-number determining unit that determines whether the number of winners drawn by the lottery drawing unit is less than or equal to a maximum number of winners indicated by data; a storage unit that stores a frame in accordance with a lottery result obtained by the lottery drawing unit; and a printing unit that prints the image data and the frame in a superimposed manner. When the number of winners is determined to be less than or equal to the maximum number of winners, the lottery drawing unit draws a lottery on the basis of data included in image data to be printed. The printing unit prints the image data and the frame in accordance with a lottery result in a superimposed manner.

Abstract: There is provided a high-stability piezoelectric oscillator. The high-stability piezoelectric oscillator includes an oscillating circuit unit that has a piezoelectric vibrator and oscillating circuit components, an inner oven that accommodates the oscillating circuit unit, an outer oven that accommodates the inner oven, and an outer metallic case that covers the outer oven. Further, airtightness is ensured inside and outside the outer metallic case. Furthermore, at least one of the outer oven and the inner oven is airtightly sealed.

Abstract: There is provided a high-stability piezoelectric oscillator. The high-stability piezoelectric oscillator includes an oscillating circuit unit that has a piezoelectric vibrator and oscillating circuit components, an inner oven that accommodates the oscillating circuit unit, an outer oven that accommodates the inner oven, and an outer metallic case that covers the outer oven. Further, airtightness is ensured inside and outside the outer metallic case. Furthermore, at least one of the outer oven and the inner oven is airtightly sealed.

Abstract: A piezoelectric oscillation circuit has a series circuit composed of a capacitor Cbe as a part of a load capacitance and a capacitor Ce inserted and connected between a base of an oscillation transistor TR1 and the ground, and has an emitter resistor Re connected to a connection midpoint A of the series circuit and an emitter of the oscillation transistor TR1. Further, a base bias circuit composed of a resistor RB 1 and a resistor RB2 is connected to a base of the oscillation transistor TR1, has a piezoelectric element Xtal and a capacitor C1 inserted and connected in series between the base of the oscillation transistor TR1 and the ground, and further has a resistor Rc connected to a collector of the oscillation transistor TR1 together with the power supply voltage Vcc line, and has a capacitor Cce connected between the collector and the emitter.

Abstract: A piezoelectric oscillator for suppressing a vibrator current easily with a simple circuit configuration is provided. A piezoelectric oscillation circuit has a series circuit composed of a capacitor Cbe as a part of a load capacitance and a capacitor Ce inserted and connected between a base of an oscillation transistor TR1 and the ground, and has an emitter resistor Re connected to a connection midpoint A of the series circuit and an emitter of the oscillation transistor TR1. Further, a base bias circuit composed of a resistor RB1 and a resistor RB2 is connected to a base of the oscillation transistor TR1, has a piezoelectric element Xtal and a capacitor C1 inserted and connected in series between the base of the oscillation transistor TR1 and the ground, and further has a resistor Rc connected to a collector of the oscillation transistor TR1 together with the power supply voltage Vcc line, and has a capacitor Cce connected between the collector and the emitter.