Abstract: A turn-drive apparatus capable of securing high acceleration at the time of turning start with a reduced relief loss includes a hydraulic pump of a variable capacity type, a turning motor, a turning control device, a relief valve, and a flow rate control device that controls a pump flow rate. The flow rate control device calculates a relief-cut-control target pump flow rate on the basis of the sum of a minimum relief flow rate and a turning-speed flow rate, and inputs a pump capacity command to the variable capacity-type hydraulic pump based thereon. The flow rate control device makes the relief-cut-control target pump flow rate larger than the sum of the minimum relief flow rate and the turning-speed flow rate at the time of turning start.

Abstract: A turn-drive apparatus capable of securing high acceleration at the time of turning start with a reduced relief loss includes a hydraulic pump of a variable capacity type, a turning motor, a turning control device, a relief valve, and a flow rate control device that controls a pump flow rate. The flow rate control device calculates a relief-cut-control target pump flow rate on the basis of the sum of a minimum relief flow rate and a turning-speed flow rate, and inputs a pump capacity command to the variable capacity-type hydraulic pump based thereon. The flow rate control device makes the relief-cut-control target pump flow rate larger than the sum of the minimum relief flow rate and the turning-speed flow rate at the time of turning start.

Abstract: A low-voltage power source circuit board is provided downstream in relation to the flow of air introduced through an intake hole and exhausted by a power source fan. Heat sinks are provided on the low-voltage power source circuit board on electronic parts that generate a large amount of heat, the plate surfaces of the heat sinks being arranged along the direction of airflow, thereby minimizing their resistance to the airflow. Air including heat generated from these electronic parts is exhausted by the power source fan without the air heating the high-voltage power source circuit board or engine circuit board that are disposed upstream in relation to the direction of airflow.

Abstract: An image forming apparatus having a housing that includes a front face, a rear wall, a pair of side walls, a bottom surface, and a top surface with a discharge surface formed therein. A cover, having a planar upper surface, is mounted on protrusions extending along each side of the top surface. The discharge surface is formed between the protrusions and has a depth proximate the rear wall that is greater than a depth proximate the front face. A cutout is formed between the cover and the front face, the cutout being in either the cover or the front face which allows discharge of the printed material. The printed material when discharged onto the discharge surface extends beyond the front face.

Abstract: A low-voltage power source circuit board is provided downstream in relation to the flow of air introduced through an intake hole and exhausted by a power source fan. Heat sinks are provided on the low-voltage power source circuit board on electronic parts that generate a large amount of heat, the plate surfaces of the heat sinks being arranged along the direction of airflow, thereby minimizing their resistance to the airflow. Air including heat generated from these electronic parts is exhausted by the power source fan without the air heating the high-voltage power source circuit board or engine circuit board that are disposed upstream in relation to the direction of airflow.

Abstract: A low-voltage power source circuit board is provided downstream in relation to the flow of air introduced through an intake hole and exhausted by a power source fan. Heat sinks are provided on the low-voltage power source circuit board on electronic parts that generate a large amount of heat, the plate surfaces of the heat sinks being arranged along the direction of airflow, thereby minimizing their resistance to the airflow. Air including heat generated from these electronic parts is exhausted by the power source fan without the air heating the high-voltage power source circuit board or engine circuit board that are disposed upstream in relation to the direction of airflow.

Abstract: An image forming apparatus having a housing that includes a front face, a rear wall, a pair of side walls, a bottom surface, and a top surface with a discharge surface formed therein. A cover, having a planar upper surface, is mounted on protrusions extending along each side of the top surface. The discharge surface is formed between the protrusions and has a depth proximate the rear wall that is greater than a depth proximate the front face. A cutout is formed between the cover and the front face, the cutout being in either the cover or the front face which allows discharge of the printed material. The printed material when discharged onto the discharge surface extends beyond the front face.

Abstract: A paper supply cassette includes a separately formed case, accommodating unit cover, and handle part. A separating mechanism for separating and conveying paper stacked in the case one sheet at a time is supported in a support unit provided on the front side surface of the case. Generally, high precision is required when mounting the separating mechanism into the paper supply cassette, and the separating mechanism must be demonstrated to have sufficient separating performance prior to shipping the product. When modifications are made to the design of the laser printer, it is possible to reuse the case while replacing the handle part with a new part, thereby eliminating the time and effort required to redesign the separating mechanism and to demonstrate its separating performance.

Abstract: An image forming apparatus having a housing that includes a front face, a rear wall, a pair of side walls, a bottom surface, and a top surface with a discharge surface formed therein. A cover, having a planar upper surface, is mounted on protrusions extending along each side of the top surface. The discharge surface is formed between the protrusions and has a depth proximate the rear wall that is greater than a depth proximate the front face. A cutout is formed between the cover and the front face, the cutout being in either the cover or the front face which allows discharge of the printed material. The printed material when discharged onto the discharge surface extends beyond the front face.

Abstract: An image forming apparatus having a housing that includes a front face, a rear wall, a pair of side walls, a bottom surface, and a top surface with a discharge surface formed therein. A cover, having a planar upper surface, is mounted on protrusions extending along each side of the top surface. The discharge surface is formed between the protrusions and has a depth proximate the rear wall that is greater than a depth proximate the front face. A cutout is formed between the cover and the front face, the cutout being in either the cover or the front face which allows discharge of the printed material. The printed material when discharged onto the discharge surface extends beyond the front face.

Abstract: Left and right frames are formed of a resin containing no glass fibers and bridged together by a tray formed of steel, a chute formed of resin, and underbars formed of steel. Each frame has a box-shape configured of a plate surface and side surfaces formed by bending the edges of plate surface in a common direction perpendicular to the plate surface, thereby preventing the plate surface from bending significantly. When the tray and underbars expand, then the frames bend slightly to absorb the load.

Abstract: An image forming apparatus having a print unit; and a reading unit, mounted above the print unit, that reads an original image on a document.

Abstract: An image forming apparatus includes a body frame having left and right side frame parts and a partition wall frame part that is placed below a sheet path passing through an image forming unit in a process unit. The process unit and a drive transmission system frame having a drive mechanism for transporting sheets are placed in a longitudinal direction on an outer face of the left side frame part. A high voltage power board, a low voltage power board, and an engine control board for the drive mechanism are fixedly placed horizontally on a lower face side of the partition wall frame part. A main control board is placed substantially vertically so as to become adjacent to the drive transmission system frame and extend along the outer face of the left side frame part. The boards and parts are connected by connection lines.

Abstract: An image forming apparatus having a print unit; and a reading unit, mounted above the print unit, that reads an original image on a document.

Abstract: A laser beam printer including a front face. The front face defines an opening for allowing attaching/detaching a paper feed cassette, an opening for allowing attaching/detaching a process unit, and an opening allowing manual paper feed. Accordingly, the laser beam printer has excellent operability since it allows the user to perform any operation from its side. At the same time, valuable space at the lateral and upper sides of the laser beam printer is available for effective use.

Abstract: An image forming apparatus includes a body frame having left and right side frame parts and a partition wall frame part that is placed below a sheet path passing through an image forming unit in a process unit. The process unit and a drive transmission system frame having a drive mechanism for transporting sheets are placed in a longitudinal direction on an outer face of the left side frame part. A high voltage power board, a low voltage power board, and an engine control board for the drive mechanism are fixedly placed horizontally on a lower face side of the partition wall frame part. A main control board is placed substantially vertically so as to become adjacent to the drive transmission system frame and extend along the outer face of the left side frame part. The boards and parts are connected by connection lines.

Abstract: A low-voltage power source circuit board is provided downstream in relation to the flow of air introduced through an intake hole and exhausted by a power source fan. Heat sinks are provided on the low-voltage power source circuit board on electronic parts that generate a large amount of heat, the plate surfaces of the heat sinks being arranged along the direction of airflow, thereby minimizing their resistance to the airflow. Air including heat generated from these electronic parts is exhausted by the power source fan without the air heating the high-voltage power source circuit board or engine circuit board that are disposed upstream in relation to the direction of airflow.

Abstract: Left and right frames are formed of a resin containing no glass fibers and bridged together by a tray formed of steel, a chute formed of resin, and underbars formed of steel. Each frame has a box-shape configured of a plate surface and side surfaces formed by bending the edges of plate surface in a common direction perpendicular to the plate surface, thereby preventing the plate surface from bending significantly. When the tray and underbars expand, then the frames bend slightly to absorb the load.

Abstract: A paper supply cassette includes a separately formed case, accommodating unit cover, and handle part. A separating mechanism for separating and conveying paper stacked in the case one sheet at a time is supported in a support unit provided on the front side surface of the case. Generally, high precision is required when mounting the separating mechanism into the paper supply cassette, and the separating mechanism must be demonstrated to have sufficient separating performance prior to shipping the product. When modifications are made to the design of the laser printer, it is possible to reuse the case while replacing the handle part with a new part, thereby eliminating the time and effort required to redesign the separating mechanism and to demonstrate its separating performance.

Abstract: A laser beam printer including a front face. The front face defines an opening for allowing attaching/detaching a paper feed cassette, an opening for allowing attaching/detaching a process unit, and an opening allowing manual paper feed. Accordingly, the laser beam printer has excellent operability since it allows the user to perform any operation from its side. At the same time, valuable space at the lateral and upper sides of the laser beam printer is available for effective use.