Abstract: A traveling crane according to the present invention includes a hook hoisting guide sheave for guiding a hook hoisting rope from the top of a boom toward the end of a jib, and the hook hoisting guide sheave is arranged on the top of the boom in a state that the guide sheave can guide the hook hoisting rope along the upper surface of the boom by folding the rope toward an upper spreader placed at a position adjacent to a boom anchor during assembling/disassembling of the crane. Thereby, the upper spreader can be moved between the boom anchor and a far end of the boom without providing a guide sheave dedicated for moving the upper spreader. Pairs of support legs are downward provided on both sides and in front and in rear of the upper spreader and a roller is provided for each support leg, so that interference between the upper spreader during movement and obstacles on the boom upper surface can be prevented even in a horizontal movement system excellent in operating efficiency.

Abstract: A semiconductor single crystal manufacturing apparatus and method are provided which are capable of improving the speed of designing and arranging a silicon single crystal manufacturing apparatus while reducing labor by making it possible to instantaneously find optimum design values and optimum arrangement for a cooler without requiring a lot of labor or time, regardless of a housing structure of a CZ furnace, in-furnace members' configuration, and manufacturing conditions. Stable manufacture of defect-free silicon single crystals is also made possible by designing and arranging the cooler such that when a heat absorption amount of the cooler is denoted by Q and a semiconductor single crystal radius is denoted by r, the heat absorption amount of the cooler Q satisfies r2/1100?Q?r2/400, or alternatively Q satisfies r2.7/20500?Q?r2.7/19300.

Abstract: A traveling crane according to the present invention includes a hook hoisting guide sheave for guiding a hook hoisting rope from the top of a boom toward the end of a jib, and the hook hoisting guide sheave is arranged on the top of the boom in a state that the guide sheave can guide the hook hoisting rope along the upper surface of the boom by folding the rope toward an upper spreader placed at a position adjacent to a boom anchor during assembling/disassembling of the crane. Thereby, the upper spreader can be moved between the boom anchor and a far end of the boom without providing a guide sheave dedicated for moving the upper spreader. Pairs of support legs are downward provided on both sides and in front and in rear of the upper spreader and a roller is provided for each support leg, so that interference between the upper spreader during movement and obstacles on the boom upper surface can be prevented even in a horizontal movement system excellent in operating efficiency.

Abstract: A traveling crane according to the present invention includes a hook hoisting guide sheave for guiding a hook hoisting rope from the top of a boom toward the end of a jib, and the hook hoisting guide sheave is arranged on the top of the boom in a state that the guide sheave can guide the hook hoisting rope along the upper surface of the boom by folding the rope toward an upper spreader placed at a position adjacent to a boom anchor during assembling/disassembling of the crane. Thereby, the upper spreader can be moved between the boom anchor and a far end of the boom without providing a guide sheave dedicated for moving the upper spreader. Pairs of support legs are downward provided on both sides and in front and in rear of the upper spreader and a roller is provided for each support leg, so that interference between the upper spreader during movement and obstacles on the boom upper surface can be prevented even in a horizontal movement system excellent in operating efficiency.

Abstract: A weight detecting apparatus for a crane includes a base machine comprising a lower traveling body and an upper rotating body; weights mounted on this base machine; ID (identification) tags which are installed on the respective weights and in which ID information on weight mounting conditions has been written; and an ID reader for reading the ID information. In this weight detecting apparatus weight detecting apparatus, the mounting conditions of the weights are detected by wireless communications between the ID reader and the ID tags.

Abstract: The crucible and the side heater are held in the respective initial positions, and the raw material is put into the crucible. These initial positions are positions where the crucible side surface is mainly heated by the side heater. When the side heater heats the crucible side surface, the raw material is melted to form melt. When a part or all of the raw material is melted, the crucible is raised from the initial position or the side heater is lowered from the initial position. At this time, the position of the crucible or the side heater is adjusted such that the amount of heat applied to the lower side curved portion of the crucible side surface is greater than that in the initial relative position between the crucible and the side heater.

Abstract: The present invention relates to a method for manufacturing a silicon single crystal by pulling up the silicon single crystal from a molten silicon by the CZ method, comprising: a cooling step of cooling the silicon single crystal by a cooler surrounding the silicon single crystal, and a heat shield body disposed surrounding an outer side and a lower side of the cooler while the silicon single crystal is being pulled up; and an Ms adjusting step of determining, in advance, an allowable range of a pulling speed at which a silicon single crystal having few crystal defects can be obtained by adjusting a distance (referred to “Ms”) from the lower surface of the heat shield body disposed on the lower side of the cooler to the surface of the molten silicon, wherein the silicon single crystal 11 is pulled up at a pulling speed within the allowable range thus determined.

Abstract: According to a control device for a hydraulic winch, a regulator controls a motor capacity of a hydraulic motor having variable capacity functioning as a driving source of the hydraulic winch in response to a load pressure, a negative brake stops and retains the hydraulic motor at an automatic shutoff for prevention of overloading, and a controller sends signals to the regulator via a regulator-controlling valve at the automatic shutoff to set the motor capacity at a large value. Thus, the delay to recover the motor capacity at the time of returning from the automatic shutoff that is activated during winding-up of a load does not occur, and a control response is increased.

Abstract: A weight detecting apparatus for a crane includes a base machine comprising a lower traveling body and an upper rotating body; weights mounted on this base machine; ID (identification) tags which are installed on the respective weights and in which ID information on weight mounting conditions has been written; and an ID reader for reading the ID information. In this weight detecting apparatus weight detecting apparatus, the mounting conditions of the weights are detected by wireless communications between the ID reader and the ID tags.

Abstract: A traveling crane according to the present invention includes a hook hoisting guide sheave for guiding a hook hoisting rope from the top of a boom toward the end of a jib, and the hook hoisting guide sheave is arranged on the top of the boom in a state that the guide sheave can guide the hook hoisting rope along the upper surface of the boom by folding the rope toward an upper spreader placed at a position adjacent to a boom anchor during assembling/disassembling of the crane. Thereby, the upper spreader can be moved between the boom anchor and a far end of the boom without providing a guide sheave dedicated for moving the upper spreader. Pairs of support legs are downward provided on both sides and in front and in rear of the upper spreader and a roller is provided for each support leg, so that interference between the upper spreader during movement and obstacles on the boom upper surface can be prevented even in a horizontal movement system excellent in operating efficiency.

Abstract: According to a control device for a hydraulic winch of the present invention, a regulator controls a motor capacity of a hydraulic motor having variable capacity functioning as a driving source of the hydraulic winch in response to a load pressure, a negative brake stops and retains the hydraulic motor at an automatic shutoff for prevention of overloading, and a controller sends signals to the regulator via a regulator-controlling valve at the automatic shutoff to set the motor capacity at a large value. Thus, the delay to recover the motor capacity at the time of returning from the automatic shutoff that is activated during winding-up of a load does not occur, and a control response is increased.

Abstract: In the process of forming-the shoulder in which the diameter of a crystal is gradually extended from a small seed crystal to a predetermined value, the largest width of a bright ring, which is formed in a boundary between the melt and the crystal pulled up from the melt, is measured, and an arc width of an arbitrary portion of the bright ring located before the largest width portion is measured. When the largest width of the bright ring has reached a predetermined value, a measured value of the arc width at the arbitrary position of the bright ring is used as a reference value, and after that, automatic control is conducted so that the measured value of the arc width can be close to the reference value.

Abstract: In this invention, three equally spaced and "L" shaped hooks 6B are rotatably supported on the upper peripheral wall of the body 6A of the seed holder 6 at pivots 6E. A radiation screen 7 is hung at the front ends of the hooks 6B via three engaging fixtures 6C affixed on its upper rim. The radiation screen 7 shaped like a hollow trancated cone, is used to surround the lower end of the single-crystal being lifted from the quartz crucible 3 which is disposed within the main chamber 1. According to the apparatus for manufacturing a single-crystal which can perform the descending or ascending movements of the radiation screen, the setting operation, and the lifting operation consecutively and automatically. Therefor the apparatus can enhance the productivity and avoid any problems with process automation, furthermore, it is compatible with conventional equipment.

Abstract: A semiconductor single crystal lift device which comprises a crucible for melting materials for forming semiconductor single crystals and a radiation screen disposed at an upper portion of the crucible and formed of a reversed-cone-shaped adiabatic tube surrounding a lift zone, the apparatus being adopted for lifting up the semiconductor single crystal from a melt in the crucible, in which the radiation screen is divided into more than three adiabatic members, at least part of the adiabatic members being configured in a detachable fashion so that an adiabatic nature of the radiation screen can be partly altered.

Abstract: An apparatus for holding a single-crystal semiconductor ingot which is stored in a pulling chamber of a single-crystal semiconductor pulling apparatus is disclosed. The apparatus includes a spindle; a base installed on the spindle and movable along the spindle; a pair of arms for holding the single-crystal semiconductor ingot; means for driving the arms; a pair of sensors for detecting the distance between the ingot and the arms; and a controller for driving the arms to the ingot according to the sensors; when each of the arms is detected to have a predetermined distance from the ingot, the controller stopping the movement of the arm; when both the arms have the predetermined distance to the ingot, the controller driving simultaneously both the arms to the ingot surface, thereby holding the ingot.

Abstract: A single-crystal semiconductor pulling apparatus improves the crystallization rate by reinforcing the physical strength of the Dash's neck portion, and eliminate the process time difference depending on the experiences of operators. The single-crystal semiconductor pulling apparatus, which is according to the Czochralski method, includes controller for automatically controlling the pulling rate of a seed crystal and a melt temperature. The controller modifies a target value of a diameter of a crystal grown from the seed which is immersed from a first value to a second value. The first value is for ensuring dislocation-free state, while the second value is for retaining physical strength of the crystal. Furthermore, the controller is provided with the function of judging the crystal to be in dislocation-free state.

Abstract: An apparatus for fabricating a semiconductor single crystal, which make it possible to reduce the oxygen concentration of a pulling single crystal, to steadily dissolve the polysilicon material received in a crucible, and to minimize the cost and installation space, is provided.The hollow cylindrical resistance heater of the apparatus, which co-axially surrounds a crucible, is provided with a ring-shaped slit excluding the location where at least two electrodes are formed, in a direction substantially perpendicular to the axial direction so as to divide the heater into an upper heating portion and a lower heating portion, and is provided with a plurality of vertical slits formed on the upper heating portion and the lower heating portion respectively, in a direction substantially parallel to the axial direction, wherein each vertical slit formed on the upper heating portion does not align with each vertical slit formed on the lower heating portion.