JP2013163594A - Jack - Google Patents

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JP2013163594A
JP2013163594A JP2013088998A JP2013088998A JP2013163594A JP 2013163594 A JP2013163594 A JP 2013163594A JP 2013088998 A JP2013088998 A JP 2013088998A JP 2013088998 A JP2013088998 A JP 2013088998A JP 2013163594 A JP2013163594 A JP 2013163594A
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torque
screw
shaft
workpiece
cylinder
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JP2013088998A
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JP5373990B2 (en
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Sadayuki Amiya
貞幸 網矢
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Sadayuki Amiya
網矢 貞幸
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Abstract

PROBLEM TO BE SOLVED: To operate a conventional jack with an auxiliary screw for height adjustment, but the operation is troublesome. Therefore, in the jack of the present invention, the shaft (5) for adjusting the height replaces the adjusting screw, and it is the torque shaft (6b) that actually lifts a heavy object by lightly touching.
The shaft (6) first adjusts the distance and actually lifts the heavy load is the torque shaft (6b), and the switching is performed by a valve (6a) provided at the bottom of the torque shaft (6b). Operate automatically.
[Selection] FIG.

Description

The present invention relates to a jack for lifting a heavy object.
  Conventional vises (the present invention is called a vise) include a box vise, a legged vise, a machine vise, and a scissor vise. A box vise is a vise used for mounting, finishing, and assembling on a workbench. The vise body is made of cast iron or cast steel, and a small vise is called a vise.
  A vise with a foot is a vise that is attached to a workbench and mainly grips the workpiece during simple forging and hand finishing, and the pinching mouth is connected with a pin at the center of both legs, so it always opens Not parallel.
A machine vise is a vise that can grab a workpiece with a milling machine, a drilling machine, etc., and a machine vise that can tilt the head of the machine vise arbitrarily. It is used for gear work or complex shaped work Convenient.
The swivel vise is a vise in which a swivel is provided at the lower part of the box vise so that it can be swung at an arbitrary angle, and is widely used for precision work.
  Therefore, in the conventional vise handle, the rotating shaft is rotatably supported by a movable body provided in the vise main body so as to be movable back and forth, and the front end of the rotating shaft is perpendicular to the axial direction of the rotating shaft. A through hole in the direction was formed, and a straight handle was attached to the through hole. However, when moving the movable body before tightening the work piece, only a small torque is required to rotate the handle, but the handle has to be rotated greatly. there were.
  In order to solve these problems, the name vise of Japanese Patent Laid-Open No. 10-180641 has been filed with a handle bent in an L shape. The vise can be moved by moving the movable body before tightening the work piece by positioning the longer handle in the front, that is, in the front-rear direction, and turning the handle with the long part, and small rotating motion, that is, small. The movable body can be easily moved with effort. Then, no unnecessary labor is required, and when the workpiece is tightened, the long portion may be rotated in the lateral direction, that is, in the left-right direction, and a large torque, that is, a strong tightening torque can be obtained. Further, the long portion can be positioned on the front, left, or right side, so that it does not interfere with the processing operation and further does not pinch the finger.
A jack is an instrument used to lift a workpiece or a structure, and a screw jack using a screw, a rack jack using a rack, and a hydraulic jack are most widely used. Among the hydraulic jacks, there is a compound pressure two-stage hydraulic jack named Japanese Patent Application Laid-Open No. 2007-284249.
The composite pressurized two-stage hydraulic jack is a jack that is used when lifting a heavy object, and there is an object that extends one stage more than a conventional one.
  In addition, the pro-lift hydraulic jack is equipped with a screw that adjusts the height to lift the object on the shaft, and in the past it was adjusted by placing the jack on the base to eliminate the gap, but the shaft By extending the screws, the base is no longer necessary and it can be jacked up.
JP-A-10-180641 JP2007-210147A JP 2004-255555 A JP 2004-261927 A JP2007-284249
  In the conventional vise, when the movable body is moved before the workpiece is tightened, the longer handle is positioned forward, that is, in the front-rear direction, and the handle can be turned with the long part. The movable body can be easily moved with a small rotational movement, that is, with a small effort. For this reason, unnecessary labor is not required, and when the workpiece is tightened, the long portion may be rotated in the lateral direction, that is, in the left-right direction, and a large torque can be obtained. That is, a strong tightening torque was obtained. However, since there was only one male screw, the number of rotations to be rotated was the same, so extra labor was used.
The jack is a tool used to lift workpieces and structures. Among the hydraulic jacks that have been applied for, there is a compound pressure two-stage hydraulic jack named JP2007-284249. When lifting, it was a two-stage type and only stretched well.
In addition, the pro-lift hydraulic jack is equipped with a screw that adjusts the height to lift the object on the shaft, and by extending the screw on the shaft, the base to lay under is unnecessary, jacking up Although it was possible to use the jack, there were many places where hands such as under the floor could not be put in, so it was difficult to adjust the screws.
Therefore, the vise grabs the workpiece quickly and reliably with both the reverse screw (1b) torque that pulls the work piece (4) lightly by pulling the male screw (2) and pushing the movable part (1). It is.
In the case of a machine vise, a vise that provides the same effect is provided by attaching a pipe (3e) with a fine pitch to the male screw (2).
Furthermore, the jack of the present invention is a jack in which the valve (6a) is tightened when the height adjusting shaft (5) touches the heavy object (8), and the torque cylinder (7) lifts the heavy object (8). It provides something that moves quickly until it is added.
In order to achieve the above object, the movable part (1) of the vise is a vice that fastens the workpiece (4) with the fixed part (3) via the male screw (2).
The movable portion (1) has a male screw (2) rotatably supported by a shaft support portion (2a), and has a handle (2b) at the tip of the shaft support portion (2a) of the male screw (2). doing.
The shaft support (2a) is provided with a cylinder (1a), and an outer side of the cylinder (1a) is provided with a reverse screw (1b) having a small pitch, and the movable part is provided via the reverse screw (1b). The object was achieved by attaching to (1) and providing the reverse screw (1b) with a torque handle (1c).
The other machine vice is a machine vice in which the workpiece (4) is sandwiched between the movable part (1) and the fixed part (3).
The movable part (1) has a male screw (2) supported by a support part (3c), and the male screw (2) is attached to the support part (3c) via a pipe (3e).
The pipe (3e) is provided with a female screw (3a) meshing with the male screw (2) on the inside, and a small pitch torque screw (1f) is provided on the outside of the pipe (3e). Achieved the purpose.
The jack of the present invention is a jack in which a shaft (5) lifts a heavy object (8), and a cylinder (6) sliding on the shaft (5) and a valve (6a) at the bottom of the cylinder (6). ), And the valve (6a) is tightened when the torque shaft (6b) is operated. Further, the outside of the cylinder (6) is a torque shaft (6b). The torque shaft (6b) slides on the torque cylinder (7), and the bottom of the torque cylinder (7) interferes with the valve ( The object was achieved by the provision of an operating rod (6c) for operating 6a).
The vice and the jack of the present invention have the following effects.
(B) Since the pitch of the male screw can be roughened, the workpiece can be quickly sandwiched.
(B) By making the pitch of the reverse screw fine, the workpiece can be securely fixed.
(C) Since the male screw only needs to sandwich the workpiece, the handle may be small.
(D) When tightening a workpiece, the reverse screw can be made small by reducing the pitch of the reverse screw.
(E) In the case of machine vice, by changing the tightening direction, it is necessary to use either fast tightening or reliable tightening.
(F) The jack shaft moves quickly but without force until it touches a heavy object.
(G) If you touch a heavy object, the torque shaft will operate and it will be slow, but there will be power.
It is sectional drawing seen from the side surface. It is sectional drawing which pinched | interposed the workpiece. It is sectional drawing which tightened the workpiece. It is a perspective view of a vice. It is sectional drawing which looked at the conventional vise from the side. It is sectional drawing seen from the side of a machine vice. It is sectional drawing which pinched | interposed the workpiece. It is sectional drawing which tightened the workpiece. It is sectional drawing seen from the side surface of the jack. It is sectional drawing which touched the heavy article. It is sectional drawing which lifted the heavy article.
The movable part (1) of the vice operates the male screw (2) with the handle (2b) to draw or open the female screw (3a) provided in the fixed part (3). The space between the base (1d) of the movable part (1) and the base (3d) of the fixed part (3) that is interlocked with it opens or closes.
The movable portion (1) has a male screw (2) rotatably supported by a shaft support portion (2a), and a handle (2b) is attached to the tip of the shaft support portion (2a) of the male screw (2). It has.
Therefore, the workpiece (4) is put on the base (1d), and the handle (2b) is operated with one hand so that the workpiece (4) is not dropped. At this time, the male screw (2) can be fastened because the pitch is rough, but since there is no torque, it does not hurt even if the fingers are pinched.
Next, the workpiece (4) is tightened by turning the torque handle (1c). The torque handle (1c) is cut reversely to the male screw (2), and the reverse screw (1b) pushes out the movable part (1) and tightens it.
However, the male screw (2) and the reverse screw (1b) have different pitches, and the male screw (2) has a rough pitch, and is made for the purpose of quickly sandwiching the workpiece (4).
  On the contrary, the reverse screw (1b) has a fine pitch and a torque, but the tightening speed is slow. Therefore, close the work piece (4) with the male screw (2). To tighten it firmly, turn the torque handle (1c) of the reverse screw (1b) in the same direction as the handle (2b) is turned. Tighten.
When removing the workpiece (4), the torque handle (1c) is rotated in the opposite direction to the previous one to remove the workpiece (4).
Therefore, the male screw (2) operated by the handle (2b) has a rough pitch because no torque is applied, and when operating the torque handle (1c), torque is emphasized so that it can be securely tightened at a fine pitch. As a result, it is no longer necessary to turn a long handle many times.
In the case of a machine vise, the male screw (2) moves the movable part (1) via the pipe (3e) attached to the support part (3c), and between the fixed part (3) and the movable part (1). The machine vice that sandwiches the workpiece (4). The pipe (3e) is provided with a female screw (3a) on the inside so as to be fitted with the male screw (2), and the pitch of the male screw (2) is rough, so that the workpiece (4) can be quickly moved. It is supposed to grab.
  Therefore, when turning the handle (2b) and turning it in the direction of tightening, if the angle of the groove of the male screw (2) does not become more resistance than the angle of the groove of the torque screw (1f) when turning while pushing, the torque screw (1f) The male screw (2) turns without turning, but when the torque screw (1f) inevitably turns, it is better to press and stop the tube (3e) so that it does not turn with fingers.
  Next, when the workpiece (4) is attracted to the movable portion (1) and the fixed portion (3), the workpiece (4) is caught even if the handle (2b) is turned and the pressing force is Since the force is exerted in the pure rotating direction and the pitch of the torque screw (1f) is smaller than that of the inclined groove of the male screw (2), the inclination of the torque screw (1f) is smaller. Rotates and pinches the workpiece (4) firmly.
  When opening, if the screw is turned normally, the torque screw (1f) is opened first, and if it is fully opened, then the male screw (2) is opened. Therefore, the pipe (3e) is always kept open.
In the case of the jack of the present invention , the jack is put under the heavy object (8). At that time, the jack has some room, and if it is perfect, the work is difficult. Then, when oil is press-fitted from the oil hole (7a), the magnet (6d) is stuck to the bottom of the torque cylinder (7), so the torque shaft (6b) does not rise and the cylinder (6) rises. At that time, since the diameter of the cylinder (6) is small, the cylinder (6) moves quickly, and the saddle (5a) of the shaft (5) touches the heavy object (8). Further, when the hydraulic pressure is applied, the torque shaft (6b) that has been caught by the magnet (6d) rises, and the valve (6a) provided at the lower portion of the torque shaft (6b) has the operating rod (6c) that is connected to the torque cylinder (7). ) And the valve (6a) is closed.
  The torque cylinder (7) lifts the heavy load (8), but the torque cylinder (7) moves slowly because it is larger in diameter than the cylinder (6), but the lifting force is about 25 times the torque of the shaft (5). There is.
If this happens, remove the oil from the oil hole (7a) and first remove the oil accumulated in the torque cylinder (7). Then, the operating rod (6c) of the valve (6a) provided at the lower part of the torque shaft (6b) Pushed to the bottom of the torque cylinder (7), the valve (6a) is released.
Then, the oil accumulated in the cylinder (6) is discharged from the oil hole (7a), and the shaft (5) is also retracted to the original position.
The vice will be described with reference to the drawings.
FIG. 5 is a cross-sectional view of a conventional vise as viewed from the side, and FIG. 1 is a cross-sectional view as seen from the same direction. It is a feature of the present invention that the cylinder (1a) is cut.
The vise was modified so that the width of the base (1d) of the movable part (1) and the base (3d) of the fixed part (3) was 15 cm at maximum.
The male screw (2) has a rougher pitch than the conventional one, and if the conventional one has 15 centimeters and 30 ridges, the present invention has 15 centimeters and 15 ridges. There is no torque.
  When sandwiching the workpiece (4) with the vice, press the workpiece (4) against the base (3d) of the fixed part (3) with one hand, and turn the handle (2b) with the other hand to (2) pulls the female screw (3a) of the fixed portion (3), the movable portion (1) moves, and the base (1d) comes into contact with the workpiece (4) as shown in FIG.
  FIG. 2 is a sectional view lightly stopped so that the workpiece (4) is not dropped. Since only the workpiece (4) is clamped and stopped, the male screw (2) can increase the pitch, and since the pitch is rough, there is no force and it is not painful even if a finger is pinched by mistake.
Next, when the torque handle (1c) is turned in the same direction, the torque handle (1c) is provided on the cylinder (1a), and the cylinder (1a) is cut with a reverse screw (1b).
The reverse screw (1b) has a pitch of 2 mm compared to a pitch of 10 mm when the male screw (2) makes one rotation, so that a torque of 5 times can be obtained.
Therefore, when turning the conventional vise handle (2b), the torque handle (1c) of the present invention moves 2 mm per rotation compared to 5 mm movement per rotation. The length of the handle (1c) may be half.
The place where the workpiece (4) is firmly sandwiched is the cross-sectional view of FIG.
The reverse screw (1b) is where the reverse female screw (1e) provided in the movable part (1) is pushed and the reverse female screw (1e) appears. The workpiece (4) is made of rubber. When the torque handle (1c) is turned in the same direction as shown in the figure, the reverse screw (1b) with the reverse screw is the reverse of the movable part (1). The female screw (1e) is pushed and the reverse screw (1b) is coming out of the movable part (1). The reverse female screw (1e) on the opposite side of the reverse screw (1b) protruding from the movable part (1) is shown in the drawing for the first time.
  FIG. 4 is a perspective view of the vise. As can be seen from the figure, the handle (2b) and the torque handle (1c) are both small, so it does not interfere with the work. .
FIG. 6 is a cross-sectional view of the machine vise as viewed from the side. The movable part (1) is slid on the guide rod (3d), and the male screw (2) is rotatably moved on the upper part of the movable part (1). , There is a retracted part, and a male screw (2) is rotatably attached thereto, so that it cannot be removed when pulled. The male screw (2) has a female screw (3a) that meshes with the male screw (2) on the inner side of the pipe (3e) interposed between the male screw (2) and the supporting portion (3c). In the conventional vise, if there are 30 centimeters of male thread (2) of 15 centimeters, the machine vice of the present invention has 15 centimeters of 15 centimeters.
  7 is a cross-sectional view seen from the side, where the movable part (1) and the fixed part (3) sandwich the workpiece (4). Since the male screw (2) has a rough pitch, if it is rotated while being pushed, the workpiece (4) is pinched with a small amount of rotation, but since there is no force, there is no pain even if a finger is pinched. In addition, as a method of rotating only the male screw (2), if the tube (3e) is held down with a finger, only the male screw (2) can be operated.
FIG. 8 is a cross-sectional view seen from the side where the workpiece (4) is firmly sandwiched.
The workpiece (4) is deformed due to rubber, but rubber was used to exhibit the function of the torque screw (3f). If the handle (2b) of the male screw (2) is continuously rotated to firmly fix the workpiece (4), the pressing force will not be applied because the workpiece (4) is sandwiched. However, only the rotating force remains, and the rotating force is easier to rotate when the pitch is finer, so the tube (3e) is attached, and the torque screw (3f) provided in the tube (3e) pushes the support portion (3c). The workpiece (4) sandwiched between the movable part (1) and the fixed part (3) is deformed.
  When loosening, the torque screw (3f) first rotates and moves to the left, and then the space between the male screw (2) and the female screw (3a) rotates. Remove the workpiece (4).
FIG. 9 is a cross-sectional view of the jack of the present invention, which is set under a heavy object (8).
The jack is a jack that lifts 5 tons with a torque cylinder (7) of φ100 and a hydraulic pressure of 50 kg / cm 2. First, oil obtained by pressurizing oil with a manual pump at 3 kg / cm 2 is sent from the oil hole (7a) provided in the torque shaft (6b) into the torque cylinder (7). The torque shaft (6b) has a magnet (6d) attached to the torque cylinder (7), so the torque shaft (6b) does not operate at a pressure of 3 kg / cm 2 and is provided at the bottom of the torque cylinder (7). Oil flows into the cylinder (6) from the hole.
  In the shaft (5) of FIG. 10, when the manual pump is operated once, 2 cc of oil is ejected to increase the hydraulic pressure, and when the handle of the manual pump is pressed 20 times, the saddle (5a) is lightened to the heavy object (8). I'm stuck. Since the diameter of the shaft (5) is φ20, there is a force of increasing 12 kg at a pressure of 3 kg / cm 2. Then, with the pressurization of 10 kg / cm 2, the magnet (6d) provided at the bottom of the torque shaft (6b) is separated and the torque shaft (6b) is raised. When lifted 5 mm, the operating rod (6c) of the valve (6a) attached to the lower part of the torque shaft (6b) was in contact with the bottom of the torque cylinder (7). The oil in the cylinder (6) has a hydraulic pressure of about 25 times that of the oil in the torque cylinder (7). Therefore, special attention must be paid to the oil seal of the cylinder (6).
  FIG. 11 shows a state where the heavy article (8) is raised. The weight (8) is 5 tons, the oil in the cylinder (6) is pressurized at 1250 kg / cm 2, and there is an oil seal that can withstand the pressure. On the other hand, the oil in the torque cylinder (7) is lifting a heavy load (8) of 5 tons with a pressure of 50 kg / cm 2. Since the manual pump sends 2 cc in one operation, the torque shaft (6b) rises by 0.2 mm at φ100. Then, when the heavy article (8) having a height of 15 cm is raised to 20 cm, the handle of the manual pump must be pushed about 250 times to raise it by 5 cm.
  When lowering a heavy object (8) or jacking up after the work is finished, remove the oil from the oil hole (7a), and when the torque shaft (6b) first descends to the bottom, the valve (6a) The operating rod (6c) hits the bottom of the torque cylinder (7), the valve (6a) is opened, the oil in the cylinder (6) is released, the shaft (5) is lowered, and the state shown in FIG. 9 is obtained.
  The hydraulic jack can also be applied to a hydraulic press. The hydraulic press was operated with one cylinder, but it took time to move a large cylinder and wasted energy, but as in the present invention, the cylinder (6) and the torque cylinder ( By separating 7), energy is wasted quickly.
  Also, by using the shaft at a low pressure, when bending a workpiece that does not require excessive force, the work is quicker because the shaft has a smaller diameter. In other words, in the case of a φ300 press, by attaching a φ200 shaft, if the shaft presses 40 tons, the torque shaft presses 90 tons and the speed of the saddle is twice different. Therefore, extra power and time can be shortened.
DESCRIPTION OF SYMBOLS 1 Movable part 1a Tube 1b Reverse screw 1c Torque handle 1d Base 1e Reverse female screw 2 Male screw 2a Shaft support 2b Handle 2c Pin 3 Fixing part 3a Female screw 3b Guide rod 3c Support part 3d Base 3e Pipe 3f Torque screw 4 Workpiece 5 5a Saddle 6 Cylinder 6a Valve 6b Torque shaft 6c Operation rod 6d Magnet 7 Torque cylinder 7a Oil hole 8 Heavy goods
  The present invention relates to a jack for lifting a heavy object.
  Conventional vises (the present invention is called a vise) include a box vise, a legged vise, a machine vise, and a scissor vise. A box vise is a vise used for mounting, finishing, and assembling on a workbench. The vise body is made of cast iron or cast steel, and a small vise is called a vise.
  A vise with a foot is a vise that is attached to a workbench and mainly grips the workpiece during simple forging and hand finishing, and the pinching mouth is connected with a pin at the center of both legs, so it always opens Not parallel.
A machine vise is a vise that can grab a workpiece with a milling machine, a drilling machine, etc., and a machine vise that can tilt the head of the machine vise arbitrarily. It is used for gear work or complex shaped work Convenient.
The swivel vise is a vise in which a swivel is provided at the lower part of the box vise so that it can be swung at an arbitrary angle, and is widely used for precision work.
  Therefore, in the conventional vise handle, the rotating shaft is rotatably supported by a movable body provided in the vise main body so as to be movable back and forth, and the front end of the rotating shaft is perpendicular to the axial direction of the rotating shaft. A through hole in the direction was formed, and a straight handle was attached to the through hole. However, when moving the movable body before tightening the work piece, only a small torque is required to rotate the handle, but the handle has to be rotated greatly. there were.
  In order to solve these problems, the name vise of Japanese Patent Laid-Open No. 10-180641 has been filed with a handle bent in an L shape. The vise can be moved by moving the movable body before tightening the work piece by positioning the longer handle in the front, that is, in the front-rear direction, and turning the handle with the long part, and small rotating motion, that is, small. The movable body can be easily moved with effort. Then, no unnecessary labor is required, and when the workpiece is tightened, the long portion may be rotated in the lateral direction, that is, in the left-right direction, and a large torque, that is, a strong tightening torque can be obtained. Further, the long portion can be positioned on the front, left, or right side, so that it does not interfere with the processing operation and further does not pinch the finger.
A jack is an instrument used to lift a workpiece or a structure, and a screw jack using a screw, a rack jack using a rack, and a hydraulic jack are most widely used. Among the hydraulic jacks, there is a compound pressure two-stage hydraulic jack named Japanese Patent Application Laid-Open No. 2007-284249.
The composite pressurized two-stage hydraulic jack is a jack that is used when lifting a heavy object, and there is an object that extends one stage more than a conventional one.
In addition, the pro-lift hydraulic jack is equipped with a screw on the shaft to adjust the height to lift the object, and in the past it was adjusted by placing a jack on the base to eliminate the gap, By extending the provided screws, the base becomes unnecessary and jack-up can be performed.
JP-A-10-180641 JP 2004-255555 A JP2007-284249
  In the conventional vise, when the movable body is moved before the workpiece is tightened, the longer handle is positioned forward, that is, in the front-rear direction, and the handle can be turned with the long part. The movable body can be easily moved with a small rotational movement, that is, with a small effort. For this reason, unnecessary labor is not required, and when the workpiece is tightened, the long portion may be rotated in the lateral direction, that is, in the left-right direction, and a large torque can be obtained. That is, a strong tightening torque was obtained. However, since there was only one male screw, the number of rotations to be rotated was the same, so extra labor was used.
The jack is a tool used to lift workpieces and structures. Among the hydraulic jacks that have been applied for, there is a compound pressure two-stage hydraulic jack named JP2007-284249. When lifting, it was a two-stage type and only stretched well.
Furthermore, the pro-lift hydraulic jack is equipped with a screw for adjusting the height to lift an object, and the screw provided on the shaft is extended to eliminate the need for a base to be laid down and jack up. However, there are many places where the jack is not used, such as under the floor, and it is difficult to adjust the screws.
Therefore, the vise grabs the workpiece quickly and reliably with both the reverse screw (1b) torque that pulls the work piece (4) lightly by pulling the male screw (2) and pushing the movable part (1). It is.
In the case of a machine vise, a vise that provides the same effect is provided by attaching a pipe (3e) with a fine pitch to the male screw (2).
Furthermore, the jack of the present invention is a jack in which the valve (6a) is tightened when the height adjusting shaft (5) touches the heavy object (8), and the torque cylinder (7) lifts the heavy object (8). It provides something that moves quickly until it is added.
In order to achieve the above object, the movable part (1) of the vise is a vice that fastens the workpiece (4) with the fixed part (3) via the male screw (2).
The movable portion (1) has a male screw (2) rotatably supported by a shaft support portion (2a), and has a handle (2b) at the tip of the shaft support portion (2a) of the male screw (2). doing.
The shaft support (2a) is provided with a cylinder (1a), and an outer side of the cylinder (1a) is provided with a reverse screw (1b) having a small pitch, and the movable part is provided via the reverse screw (1b). The object was achieved by attaching to (1) and providing the reverse screw (1b) with a torque handle (1c).
The other machine vice is a machine vice in which the workpiece (4) is sandwiched between the movable part (1) and the fixed part (3).
The movable part (1) has a male screw (2) supported by a support part (3c), and the male screw (2) is attached to the support part (3c) via a pipe (3e).
The pipe (3e) is provided with a female screw (3a) meshing with the male screw (2) on the inside, and a small pitch torque screw (1f) is provided on the outside of the pipe (3e). Achieved the purpose.
  The jack of the present invention is a jack in which a shaft (5) lifts a heavy object (8), and a cylinder (6) sliding on the shaft (5) and a valve (6a) at the bottom of the cylinder (6). ), And the valve (6a) is tightened when the torque shaft (6b) is operated. Further, the outside of the cylinder (6) is a torque shaft (6b). The torque shaft (6b) slides on the torque cylinder (7), and the bottom of the torque cylinder (7) interferes with the valve ( The object was achieved by the provision of an operating rod (6c) for operating 6a).
The vice and the jack of the present invention have the following effects.
(B) Since the pitch of the male screw can be roughened, the workpiece can be quickly sandwiched.
(B) By making the pitch of the reverse screw fine, the workpiece can be securely fixed.
(C) Since the male screw only needs to sandwich the workpiece, the handle may be small.
(D) When tightening a workpiece, the reverse screw can be made small by reducing the pitch of the reverse screw.
(E) In the case of machine vice, by changing the tightening direction, it is necessary to use either fast tightening or reliable tightening.
(F) The jack shaft moves quickly but without force until it touches a heavy object.
(G) If you touch a heavy object, the torque shaft will operate and it will be slow, but there will be power.
It is sectional drawing seen from the side surface. It is sectional drawing which pinched | interposed the workpiece. It is sectional drawing which tightened the workpiece. It is a perspective view of a vice. It is sectional drawing which looked at the conventional vise from the side. It is sectional drawing seen from the side of a machine vice. It is sectional drawing which pinched | interposed the workpiece. It is sectional drawing which tightened the workpiece. It is sectional drawing seen from the side surface of the jack. It is sectional drawing which touched the heavy article. It is sectional drawing which lifted the heavy article.
The movable part (1) of the vice operates the male screw (2) with the handle (2b) to draw or open the female screw (3a) provided in the fixed part (3). The space between the base (1d) of the movable part (1) and the base (3d) of the fixed part (3) that is interlocked with it opens or closes.
The movable portion (1) has a male screw (2) rotatably supported by a shaft support portion (2a), and a handle (2b) is attached to the tip of the shaft support portion (2a) of the male screw (2). It has.
Therefore, the workpiece (4) is put on the base (1d), and the handle (2b) is operated with one hand so that the workpiece (4) is not dropped. At this time, the male screw (2) can be fastened because the pitch is rough, but since there is no torque, it does not hurt even if the fingers are pinched.
Next, the workpiece (4) is tightened by turning the torque handle (1c). The torque handle (1c) is cut reversely to the male screw (2), and the reverse screw (1b) pushes out the movable part (1) and tightens it.
However, the male screw (2) and the reverse screw (1b) have different pitches, and the male screw (2) has a rough pitch, and is made for the purpose of quickly sandwiching the workpiece (4).
  On the contrary, the reverse screw (1b) has a fine pitch and a torque, but the tightening speed is slow. Therefore, close the work piece (4) with the male screw (2). To tighten it firmly, turn the torque handle (1c) of the reverse screw (1b) in the same direction as the handle (2b) is turned. Tighten.
When removing the workpiece (4), the torque handle (1c) is rotated in the opposite direction to the previous one to remove the workpiece (4).
Therefore, the male screw (2) operated by the handle (2b) has a rough pitch because no torque is applied, and when operating the torque handle (1c), torque is emphasized so that it can be securely tightened at a fine pitch. As a result, it is no longer necessary to turn a long handle many times.
  In the case of a machine vise, the male screw (2) moves the movable part (1) via the pipe (3e) attached to the support part (3c), and between the fixed part (3) and the movable part (1). The machine vice that sandwiches the workpiece (4). The pipe (3e) is provided with a female screw (3a) on the inside so as to be fitted with the male screw (2), and the pitch of the male screw (2) is rough, so that the workpiece (4) can be moved quickly. It is supposed to grab.
  Therefore, when turning the handle (2b) and turning it in the direction of tightening, if the angle of the groove of the male screw (2) does not become more resistance than the angle of the groove of the torque screw (1f) when turning while pushing, the torque screw (1f) The male screw (2) turns without turning, but when the torque screw (1f) inevitably turns, it is better to press and stop the tube (3e) so that it does not turn with fingers.
  Next, when the workpiece (4) is attracted to the movable portion (1) and the fixed portion (3), the workpiece (4) is caught even if the handle (2b) is turned and the pressing force is Since the force is exerted in the pure rotating direction and the pitch of the torque screw (1f) is smaller than that of the inclined groove of the male screw (2), the inclination of the torque screw (1f) is smaller. Rotates and pinches the workpiece (4) firmly.
  When opening, if the screw is turned normally, the torque screw (1f) is opened first, and if it is fully opened, then the male screw (2) is opened. Therefore, the pipe (3e) is always kept open.
  In the case of the jack of the present invention, the jack is put under the heavy object (8). At that time, the jack has some room, and if it is perfect, the work is difficult. Then, when oil is press-fitted from the oil hole (7a), the magnet (6d) is stuck to the bottom of the torque cylinder (7), so the torque shaft (6b) does not rise and the cylinder (6) rises. At that time, since the diameter of the cylinder (6) is small, the cylinder (6) moves quickly, and the saddle (5a) of the shaft (5) touches the heavy object (8). Further, when the hydraulic pressure is applied, the torque shaft (6b) that has been caught by the magnet (6d) rises, and the valve (6a) provided at the lower portion of the torque shaft (6b) has the operating rod (6c) that is connected to the torque cylinder (7). ) And the valve (6a) is closed.
  The torque cylinder (7) lifts the heavy load (8), but the torque cylinder (7) moves slowly because it is larger in diameter than the cylinder (6), but the lifting force is about 25 times the torque of the shaft (5). There is.
If this happens, remove the oil from the oil hole (7a) and first remove the oil accumulated in the torque cylinder (7). Then, the operating rod (6c) of the valve (6a) provided at the lower part of the torque shaft (6b) Pushed to the bottom of the torque cylinder (7), the valve (6a) is released.
Then, the oil accumulated in the cylinder (6) is discharged from the oil hole (7a), and the shaft (5) is also retracted to the original position.
(Reference Example 1)
The vice will be described with reference to the drawings.
FIG. 5 is a cross-sectional view of a conventional vise as viewed from the side, and FIG. 1 is a cross-sectional view as seen from the same direction. It is a feature of the present invention that the cylinder (1a) is cut.
The vise was modified so that the width of the base (1d) of the movable part (1) and the base (3d) of the fixed part (3) was 15 cm at maximum.
The male screw (2) has a rougher pitch than the conventional one, and if the conventional one has 15 centimeters and 30 ridges, the present invention has 15 centimeters and 15 ridges. There is no torque.
  When sandwiching the workpiece (4) with the vice, press the workpiece (4) against the base (3d) of the fixed part (3) with one hand, and turn the handle (2b) with the other hand to (2) pulls the female screw (3a) of the fixed portion (3), the movable portion (1) moves, and the base (1d) comes into contact with the workpiece (4) as shown in FIG.
  FIG. 2 is a sectional view lightly stopped so that the workpiece (4) is not dropped. Since only the workpiece (4) is clamped and stopped, the male screw (2) can increase the pitch, and since the pitch is rough, there is no force and it is not painful even if a finger is pinched by mistake.
Next, when the torque handle (1c) is turned in the same direction, the torque handle (1c) is provided on the cylinder (1a), and the cylinder (1a) is cut with a reverse screw (1b).
The reverse screw (1b) has a pitch of 2 mm compared to a pitch of 10 mm when the male screw (2) makes one rotation, so that a torque of 5 times can be obtained.
Therefore, when turning the conventional vise handle (2b), the torque handle (1c) of the present invention moves 2 mm per rotation compared to 5 mm movement per rotation. The length of the handle (1c) may be half.
The place where the workpiece (4) is firmly sandwiched is the cross-sectional view of FIG.
The reverse screw (1b) is where the reverse female screw (1e) provided in the movable part (1) is pushed and the reverse female screw (1e) appears. The workpiece (4) is made of rubber. When the torque handle (1c) is turned in the same direction as shown in the figure, the reverse screw (1b) with the reverse screw is the reverse of the movable part (1). The female screw (1e) is pushed and the reverse screw (1b) is coming out of the movable part (1). The reverse female screw (1e) on the opposite side of the reverse screw (1b) protruding from the movable part (1) is shown in the drawing for the first time.
FIG. 4 is a perspective view of the vise. As can be seen from the figure, the handle (2b) and the torque handle (1c) are small, so it does not interfere with the work. However, if a pipe is inserted into the torque handle (1c) and turned, it can be tightened with a larger torque. .
(Reference Example 2)
  FIG. 6 is a cross-sectional view of the machine vise as viewed from the side. The movable part (1) is slid on the guide rod (3d), and the male screw (2) is rotatably moved on the upper part of the movable part (1). , There is a retracted part, and a male screw (2) is rotatably attached thereto, so that it cannot be removed when pulled. The male screw (2) has a female screw (3a) that meshes with the male screw (2) on the inner side of the pipe (3e) interposed between the male screw (2) and the supporting portion (3c). In the conventional vise, if there are 30 centimeters of male thread (2) of 15 centimeters, the machine vice of the present invention has 15 centimeters of 15 centimeters.
  7 is a cross-sectional view seen from the side, where the movable part (1) and the fixed part (3) sandwich the workpiece (4). Since the male screw (2) has a rough pitch, if it is rotated while being pushed, the workpiece (4) is pinched with a small amount of rotation, but since there is no force, there is no pain even if a finger is pinched. In addition, as a method of rotating only the male screw (2), if the tube (3e) is held down with a finger, only the male screw (2) can be operated.
FIG. 8 is a cross-sectional view seen from the side where the workpiece (4) is firmly sandwiched.
The workpiece (4) is deformed due to rubber, but rubber was used to exhibit the function of the torque screw (3f). If the handle (2b) of the male screw (2) is continuously rotated to firmly fix the workpiece (4), the pressing force will not be applied because the workpiece (4) is sandwiched. However, only the rotating force remains, and the rotating force is easier to rotate when the pitch is finer, so the tube (3e) is attached, and the torque screw (3f) provided in the tube (3e) pushes the support portion (3c). The workpiece (4) sandwiched between the movable part (1) and the fixed part (3) is deformed.
  When loosening, the torque screw (3f) first rotates and moves to the left, and then the space between the male screw (2) and the female screw (3a) rotates. Remove the workpiece (4).
FIG. 9 is a cross-sectional view of the jack of the present invention, which is set under a heavy object (8).
The jack is a jack that lifts 5 tons with a torque cylinder (7) of φ100 and a hydraulic pressure of 50 kg / cm 2. First, oil obtained by pressurizing oil with a manual pump at 3 kg / cm 2 is sent from the oil hole (7a) provided in the torque shaft (6b) into the torque cylinder (7). The torque shaft (6b) has a magnet (6d) attached to the torque cylinder (7), so the torque shaft (6b) does not operate at a pressure of 3 kg / cm 2 and is provided at the bottom of the torque cylinder (7). Oil flows into the cylinder (6) from the hole.
  In the shaft (5) of FIG. 10, when the manual pump is operated once, 2 cc of oil is ejected to increase the hydraulic pressure, and when the handle of the manual pump is pressed 20 times, the saddle (5a) is lightened to the heavy object (8). I'm stuck. Since the diameter of the shaft (5) is φ20, there is a force of increasing 12 kg at a pressure of 3 kg / cm 2. Then, with the pressurization of 10 kg / cm 2, the magnet (6d) provided at the bottom of the torque shaft (6b) is separated and the torque shaft (6b) is raised. When lifted 5 mm, the operating rod (6c) of the valve (6a) attached to the lower part of the torque shaft (6b) was in contact with the bottom of the torque cylinder (7). The oil in the cylinder (6) has a hydraulic pressure of about 25 times that of the oil in the torque cylinder (7). Therefore, special attention must be paid to the oil seal of the cylinder (6).
  FIG. 11 shows a state where the heavy article (8) is raised. The weight (8) is 5 tons, the oil in the cylinder (6) is pressurized at 1250 kg / cm 2, and there is an oil seal that can withstand the pressure. On the other hand, the oil in the torque cylinder (7) is lifting a heavy load (8) of 5 tons with a pressure of 50 kg / cm 2. Since the manual pump sends 2 cc in one operation, the torque shaft (6b) rises by 0.2 mm at φ100. Then, when the heavy article (8) having a height of 15 cm is raised to 20 cm, the handle of the manual pump must be pushed about 250 times to raise it by 5 cm.
  When lowering a heavy object (8) or jacking up after the work is finished, remove the oil from the oil hole (7a), and when the torque shaft (6b) first descends to the bottom, the valve (6a) The operating rod (6c) hits the bottom of the torque cylinder (7), the valve (6a) is opened, the oil in the cylinder (6) is released, the shaft (5) is lowered, and the state shown in FIG. 9 is obtained.
  The hydraulic jack can also be applied to a hydraulic press. The hydraulic press was operated with one cylinder, but it took time to move a large cylinder and wasted energy, but as in the present invention, the cylinder (6) and the torque cylinder ( By separating 7), energy is wasted quickly.
  Also, by using the shaft at a low pressure, when bending a workpiece that does not require excessive force, the work is quicker because the shaft has a smaller diameter. In other words, in the case of a φ300 press, by attaching a φ200 shaft, if the shaft presses 40 tons, the torque shaft presses 90 tons and the speed of the saddle is twice different. Therefore, extra power and time can be shortened.
DESCRIPTION OF SYMBOLS 1 Movable part 1a Tube 1b Reverse screw 1c Torque handle 1d Base 1e Reverse female screw 2 Male screw 2a Shaft support 2b Handle 2c Pin 3 Fixing part 3a Female screw 3b Guide rod 3c Support part 3d Base 3e Pipe 3f Torque screw 4 Workpiece 5 5a Saddle 6 Cylinder 6a Valve 6b Torque shaft 6c Operation rod 6d Magnet 7 Torque cylinder 7a Oil hole 8 Heavy goods

Claims (1)

  1. The shaft (5) is a jack for lifting a heavy object (8),
    A cylinder (6) sliding on the shaft (5);
    A valve (6a) is formed at the bottom of the cylinder (6).
    The outside of the cylinder (6) is a torque shaft (6b),
    The torque shaft (6b) slides on the torque cylinder (7),
    An operating rod (6c) for operating the valve (6a) by the interference of the bottom of the torque cylinder (7) is provided,
    A magnet (6d) is attached to the bottom of the torque shaft (6b) so that the oil in the torque cylinder (7) does not act immediately.
    The jack according to claim 1, wherein the magnet (6d) of the torque shaft (6b) is stuck to the bottom of the torque cylinder (7).
JP2013088998A 2013-04-22 2013-04-22 jack Expired - Fee Related JP5373990B2 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02239097A (en) * 1989-03-10 1990-09-21 Sanyo Kiki Kk Single-acting telescopic cylinder type load lifting device
JPH07330294A (en) * 1994-06-13 1995-12-19 Nissan Altia Co Ltd Lift device
JP2007284249A (en) * 2006-04-19 2007-11-01 Takeshi Shimizu Composite pressurization two-stage hydraulic jack

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02239097A (en) * 1989-03-10 1990-09-21 Sanyo Kiki Kk Single-acting telescopic cylinder type load lifting device
JPH07330294A (en) * 1994-06-13 1995-12-19 Nissan Altia Co Ltd Lift device
JP2007284249A (en) * 2006-04-19 2007-11-01 Takeshi Shimizu Composite pressurization two-stage hydraulic jack

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