JP2009066607A - Workpiece reversing jig, mold reversing device, and method for lifting workpiece - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perpendicularly lift and reverse the upper die of a die set, which are various in size and weight, with efficient safety light work. <P>SOLUTION: A main shaft 105 having a male screw part is fastened to the upper die of a die set, which has a female screw part. There are provided: a belt holding part 103, which is set in a rotatable manner with respect to the main shaft 105; a support plate 104 for supporting the belt holding part 103, which is fixed to the main shaft 105; a nut 101 for screw fastening, which prevents the belt holding part 103 from coming off from the main shaft; and a lock nut 102, with which the nut 101 for screw fastening does not get loose. The upper die of a die set is lifted using a crane and a belt, and the main shaft and the upper die of a die set are turned together by a rotatable sling holding part, so that reversing work of a workpiece is safely and efficiently conducted. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention separates a workpiece made of two members, such as a mold used in a press, for example, by separating one mold member from the other mold member and inverting one of the mold members to facilitate maintenance. In particular, the present invention relates to a jig, a device, and a lifting method that can be reversed, and more particularly to a tool that can be easily inspected and treated on the lower surface of a workpiece.

  A large die set weighs several tons and its slinging work is always dangerous. In order to change the press die, it is necessary to first lift only the upper die of the die set and divide the upper die, and then to invert the upper die. In the case of a die set, the guide post protrudes downward or upward, and the center of the mating surface is occupied by the press die, so the position where the guide post is erected is at least symmetrical back and forth. The center of gravity when lifting is unstable, and there is a danger in unreasonable reversing work.

  There are many conventional die set reversing devices such as a press, such as a type in which a die set or a mold can be placed as it is, a type in which a crane is modified, or a device is attached.

In the type in which the die set or the mold shown in FIG. 4 is directly mounted, the rotary frame 2 is rotatably engaged with the opening of the U-shaped frame 1, and the inner sides of the two opposite sides of the rotary frame 2. Alignment frames 21A and 21B that can be horizontally moved independently of each other are internally fitted, and the same number of attachments 22 that can be fitted with a plurality of suspensions projecting on the outer side of the die set inside the width adjustment frames 21A and 21B. Is attached in a detachable manner, and an engaging material 11 for lifting is projected from the center of the apex side opposite to the opening of the frame 1 (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 5-200455

  However, the reversing device shown above, which is a conventional technology, is a large-scale device, and a wide work space is indispensable for the manufacture, purchase, and installation of the device itself, and the introduction of the device is enormous. The problem is that it takes time and money. In addition, the size of the entire apparatus is required in proportion to the size of the workpiece.

  The present invention solves the conventional problems described above, and provides a crane lifting type reversing jig that can lift and reverse heavy objects of various sizes and forms by a lifting device such as a crane. An object of the present invention is to enable the reversing operation to be performed safely and to allow a normal crane to be used as it is so that the versatility of the crane is not impaired and the production cost is not increased.

  In order to solve the conventional problem, a workpiece reversing jig according to the present invention includes a main shaft having a male screw portion, a linear body holding portion installed so as to be able to roll with respect to the main shaft, a fastening nut, , A fastening nut loosening prevention lock nut, and a linear body holding part support plate, a gap is provided between the main shaft and the linear body holding part, and the linear body holding part, the fastening nut and the linear body holding part support plate It is characterized by providing a gap between the two. This is because the linear body can easily roll on the main shaft.

  More preferably, grooves corresponding to the filaments may be formed in the linear body holding part. This is because the linear body holding portion reliably holds the linear body when the linear body is hung on the linear holding portion.

  More preferably, a bearing may be provided in the gap between the linear body holding portion and the main shaft. This is because the linear body can roll more easily on the main shaft.

  The mold reversing device of the present invention is characterized by comprising a work reversing jig, a linear body that holds the reversing jig, and a traveling type moving device connected via the linear body.

  The workpiece lifting method of the present invention includes a main shaft having a male screw portion, a linear body holding portion installed so as to be able to roll with respect to the main shaft, a fastening nut, a locking nut for preventing loosening of a fastening nut, a wire Two workpiece reversing jigs equipped with a support member support plate are used, and the work reversing jig is attached to one side of the workpiece and the side and back-to-back sides. It is located on the straight line which passes through, and it is characterized by hanging a linear body on the linear body holding part of two reversing jigs. This is because the workpiece can be lifted in a stationary state.

  As described above, according to the workpiece reversing jig, the mold reversing device, and the workpiece lifting method of the present invention, an ordinary crane can be used as it is. A heavy object having a size and shape can be lifted and reversed so that a work reversing work such as a mold can be performed safely and efficiently. Further, since the rotating portion rotates about the shaft, the rotation of the main shaft can be prevented due to the friction between the jig and the belt, and the loosening and excessive tightening of the screw can be prevented.

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

  FIG. 1 is a perspective view and a cross-sectional view showing a workpiece reversing jig according to an embodiment of the present invention. As shown in FIG. 1, the fastening nut 101 and the lock nut 102 for preventing the fastening nut 101 from being loosened are fastened to the main shaft 105 with a double lock nut structure, and the belt holding portion 103 does not come off from the main shaft 105. It serves as a stopper. The belt holding part support plate 104 has a disc shape and is fixed to the main shaft 105 by, for example, welding or the like, and prevents the belt holding part 103 from falling. There is a predetermined amount of difference between the inner diameter of the belt holding portion 103 and the outer diameter of the main shaft 105, and a gap is provided. This is because when the heavy object is lifted by the belt, the belt is held by the groove portion of the belt holding portion 103, so that even if a heavy weight load is applied to the belt holding portion 103 and the main shaft 105, the belt holding portion 103 moves the main shaft 105. This is to allow easy rotation to the center. A predetermined amount of gap is also provided between the belt holding portion 103 and the fastening nut 101 and the belt holding portion support plate 104. This is because the belt holding portion 103 prevents interference with the fastening nut 101 and the belt holding portion support plate 104 during rotation around the main shaft 105 of the belt holding portion 103 and avoids problems such as breakage. It is. The range of the main shaft 105 that overlaps the belt holding portion 103 avoids the occurrence of problems due to breakage or crushing of the thread when a heavy load is applied, and the thread is not molded for safety. The threaded portion of the main shaft 105 is only the range in which the fastening nut 101 and the lock nut 102 are attached and the range in which the main shaft 105 is attached to the workpiece.

  FIG. 2 shows a state of the mold reversing device in which the upper die set 202 is lifted by the suspension belt 201 using the work reversing jig in the embodiment of the present invention. In FIG. 2, the same components as those in FIG. As shown in FIG. 2, when lifting the workpiece, two workpiece reversing jigs are required.

  Here, the work reversing jig 106 is attached to one side surface of the upper die set 202 and the other side surface back to back, and the upper die set 202 is lifted by a suspension belt 201 that is hung on the work reversing jig 106. At this time, it is preferable that the upper die set 202 is mounted on a straight line that passes through the center of gravity of the upper die set, that is, a position to be balanced so that no rotational moment is generated.

  Thus, the upper die set 202 is lifted in a stationary state, and it is safe and easy to take advantage of the fact that the main shaft 105 and the belt holding portion 103 are easily slidable, which is a feature of the reversing jig 106 of the present invention. A work lifting method that allows maintenance by reversing the upper die set 202 in a light work.

  FIG. 3 shows an example of the mold reversing device in the embodiment of the present invention. FIG. 3A is a top view of the embodiment. The traveling crane 302 can freely travel through the traveling rail 301. Thus, the mold can be lifted and moved anywhere within the range in which the traveling crane 302 is installed. FIG. 3B shows a front view of the embodiment. Using the workpiece reversing jig 306 according to the embodiment of the present invention, the mold 307 is lifted through a suspension belt 305, a connecting hook 304, and a chain block 303 whose length can be adjusted. It is connected to a traveling lifting device composed of a type crane 302. Thereby, the mold can be reversed at an arbitrary height.

  With the above configuration, when the workpiece reversing jig of the present invention is used, a heavy object of various sizes and forms can be lifted and reversed, and the workpiece reversing operation can be performed safely and efficiently. Further, since the rotating part rotates around the shaft, the rotation of the main shaft due to the friction between the jig and the belt can be prevented, and the loosening and excessive tightening of the screw can be prevented.

  In this embodiment, the suspension belt is used as a tool for lifting the workpiece. However, a linear body such as a wire or a rope may be used as a tool for lifting. In that case, the groove width of the belt holding portion 103 needs to be changed according to the diameter of the linear body, and the total length of the belt holding portion 103 needs to be changed accordingly. In addition, a rolling bearing such as a bearing may be installed inside the belt holding unit 103 to reduce friction with the main shaft 105 and to make the rotation easier.

  It can be used for lifting and lifting heavy objects, and is particularly effective for maintenance of dies.

A perspective view and sectional view of a work reversing jig in an embodiment of the invention The figure which shows the example using the workpiece reversing jig in embodiment of this invention The schematic diagram of the state using the workpiece reversing jig in embodiment of this invention A perspective view of a conventional reversing device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Frame 2 Rotating frame 11 Engagement material 21A, 21B Alignment frame 22 Attachment 26 Handle 29 Scale 30 Counterbalance 101 Nut for fastening 102 Lock nut 103 Belt holding part 104 Belt holding part support plate 105 Main shaft 106, 306 Work reversing jig 201 hanging belt 202 upper die set 203 lower die set 301 traveling rail 302 traveling crane 303 chain block 304 connecting hook 305 hanging belt 307 mold

Claims (5)

A main shaft having a male screw portion, a linear body holding portion installed so as to be able to roll with respect to the main shaft, a fastening nut, a locking nut for preventing loosening of a fastening nut, and a linear body holding portion support plate A workpiece reversing treatment characterized in that a gap is provided between the main shaft and the linear body holding portion, and a gap is provided between the linear body holding portion, the fastening nut, and the linear body holding portion support plate. Ingredients. The work reversing jig according to claim 1, wherein the linear body holding portion is formed with a groove corresponding to the linear body. The work reversing jig according to claim 1, wherein a bearing is provided in a gap between the linear body holding portion and the main shaft. A work reversing jig according to any one of claims 1 to 3, a linear body holding the reversing jig, and a traveling type moving device connected through the linear body. A mold reversing device. A main shaft having a male screw portion, a linear body holding portion installed so as to be able to roll with respect to the main shaft, a fastening nut, a locking nut for preventing loosening of a fastening nut, and a linear body holding portion support plate are provided. Two work reversing jigs
The workpiece reversing jig is attached to one side surface of the workpiece and the side surface and the back-to-back side surface,
The workpiece reversing jig is substantially located on a straight line passing through the center of gravity of the workpiece;
A work lifting method, characterized in that a linear body is hung on the linear body holding portions of the two reversing jigs.

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