JP2017144496A - Bandsaw blade replacement device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bandsaw blade replacement device which can replace bandsaw blade remotely and can continue cutting operation safely and reliably even in a simple constitution having a small number of components.SOLUTION: A bandsaw blade replacement device 1A includes a bandsaw blade retention plate 20 which retains a bandsaw blade on the lower side of a hanger part 3 and performs a replacement operation of the bandsaw blade 100A disposed between a driving wheel 71a of a bandsaw machine 7 and a driven wheel 71b while hanging down the bandsaw blade with a crane means. Electro-magnets 21, 22, 23 as retention means configured in oblong in such a state that an operation for retaining the bandsaw blade 100A such that the bandsaw blade retention plate 20 assumes an oblong oval shape along inside and outside surfaces and an operation for releasing the bandsaw blade are permitted, are provided, right and left both end sides of the electro-magnets are rotatably pivotally supported and are allowed to perform rotation operation at every 180° with a motor 5, and the operation for retaining the old bandsaw blade to the retention means and the operation for rotating the bandsaw blade retention plate which retains the old bandsaw blade thereon by 180° and fitting a new bandsaw blade from the retention plate can be continuously performed.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a band saw blade exchanging device for a band saw machine, and in particular, a band saw machine for performing a cutting operation in a situation where there is a danger to a human body such as a cutting operation of a workpiece contaminated with a radioactive material or a fear of radiation exposure. The present invention relates to a band saw blade exchanging device for exchanging a band saw blade remotely and safely.

  Band saw machines that cut workpieces with a band saw blade that travels endlessly by installing an annular band saw blade on the drive wheel and driven wheel and rotating the drive wheel are well known, but their high cutting force and cutting speed Therefore, it is frequently used for cutting hard workpieces and large workpieces that are difficult to cut with ordinary tools.

  However, when replacing worn band saw blades, it is common for an operator to remove the old band saw blades installed on the drive wheel and driven wheel and replace them with new ones. Was time consuming and risky. Further, for example, in a work environment in which a workpiece contaminated with a radioactive material is cut or exposed to radiation, manual band saw blade replacement should be avoided from the viewpoint of ensuring worker safety.

  On the other hand, Japanese Patent Application Laid-Open No. 4-105817 discloses a handling holder having a handling portion provided with clamping means for detachably supporting the band saw blade at a plurality of locations, and the handling portion and the saw blade housing by the handling portion. A handling arm that moves the handling holder between a saw blade replacement position close to the saw blade housing and a saw blade filling and collecting position away from the saw blade housing so that the band saw blade can be exchanged between the two wheels. A band saw blade exchanging device with a sword has been proposed, and the band saw blade can be automatically replaced without human intervention.

  Japanese Patent Laid-Open No. 6-262429 has a plate-like body in which a fixed saw blade holding ring and a movable saw blade holding ring that can be moved close to and away from the upper frame of a cutting head having two wheels are provided. The tool stocker is capable of stocking the band saw blade, and the band saw blade can be held on both sides while the plate-like body is rotatable, so that the old band saw blade is recovered on one side. A band saw blade replacement device that can supply a new band saw blade on the other side has been proposed. By making both sides of the plate-like body usable as a stocker, it is more compact than the band saw blade replacement device described above. Yes.

  However, in recent years, in order to dispose of facilities and equipment contaminated with radioactive materials or given radioactivity at radiotherapy facilities, nuclear power plants, etc., they are cut to a size that can be stored in a predetermined waste container. Needs are increasing. In this case, in addition to the space for the cutting operation being limited more than usual, the band saw machine and the band saw blade changing device that are contaminated by the operation eventually need to be safely discarded.

  For this reason, the device that performs the cutting operation in such a situation is required to have a more compact size than that described above. It is desired to develop a band saw machine and a band saw blade replacement device that can safely and reliably continue.

JP-A-4-105817 JP-A-6-262429

  The present invention is intended to solve the above-described problems, and the band saw blade exchanging device enables the remote exchanging of the band saw blade even with a simple configuration with a small number of parts. The task is to ensure that work can be continued safely and reliably.

  Therefore, the present invention includes a hanger part having a connecting means to which the crane means is connected on the upper end side, and a band saw blade holding plate that is connected to the lower side of the hanger part and holds the band saw blade. A band saw blade exchanging device for exchanging a band saw blade mounted on a driven wheel and a driven wheel exposed to the upper part of a band saw while being moved in a three-dimensional manner in a suspended state, the band saw blade holding plate Is provided with holding means on the front and back sides in a state in which the operation of holding the band saw blade so as to form a horizontally long oval along the front and back surfaces and the operation of releasing the band saw blade are possible, and The center part of both left and right ends is pivotally supported below the hanger so as to be rotatable about the major axis in the major axis direction, and can be rotated every 180 degrees by a motor attached to the pivot. An operation to hold the old band saw blade by holding the old band saw blade by moving the old band saw blade to the holding means by bringing the surface side not holding the band saw blade close to the driving wheel and driven wheel of the band saw machine from the front. It is possible to continuously perform both the operation of rotating 180 degrees and holding the new band saw blade close to the driving wheel and the driven wheel from the front side and removing the new band saw blade from the holding means. It was characterized by that.

  In this way, the band saw blade moving device is operated separately from the band saw machine while the band saw blade moving device is operated by the crane means, so that the band saw blade moving means such as the handling arm is omitted. A simple configuration can be realized, and in addition to this, the holding means capable of holding the band saw blade is provided on both the front and back surfaces of one band saw blade holding plate so that it can be rotated. It is possible to receive the old band saw blade of the band saw machine, rotate it 180 degrees as it is, and attach the new band saw blade to the band saw machine from the other holding means, so even a simple configuration with a minimum number of parts is easy Thus, the replacement work can be completed, and the cutting operation of the band saw machine can be continued safely and reliably.

  Further, in this band saw blade exchanging device, both the holding means of the band saw blade holding plate each include a plurality of electromagnets arranged at predetermined positions on the outer edge side of the front and back surfaces of the band saw blade holding plate. The outer peripheral surface of the band saw blade is held in an oval shape while being magnetically attracted on the inner peripheral surface side, and the electromagnet excitation and demagnetization operations can be performed remotely and the front and back operations can be performed separately. It is easy to hold, detach, and transfer the band saw blade without requiring large parts such as a band saw blade holding wheel or complicated parts such as a changer that transfers the band saw blade. It will be something that can be done.

  In this case, the arrangement of the electromagnet is such that the minor axis of the band saw blade is larger than the minor axis of the band saw blade mounted on the drive wheel and the driven wheel in a state where the band saw blade is held in an oval shape by the magnetic adsorption. The major axis is smaller than the major axis in the installed state. When the band saw blade of the band saw machine is attached / detached, the driven wheel is moved to the drive wheel side, and the substantially oval shape is formed by all electromagnets. If both wheels are designed to fit inside the inner space, it is easy to attach and detach the band saw blade by simply energizing / demagnetizing the electromagnet and moving the driven wheel. And it can be done reliably.

  According to the present invention, the band saw blade exchanging device is moved by the crane means while being separated from the band saw machine, and holding means capable of holding the band saw blade on both the front and back surfaces of the band saw blade holding plate are provided for rotation operation. Even with a simple configuration with a small number of parts, the band saw blade can be remotely replaced, and the cutting operation of the band saw machine can be continued safely and reliably.

It is a front view of the band saw blade replacement | exchange apparatus which is embodiment of this invention. (A) is a perspective view of the band saw blade replacement apparatus of FIG. 1, (B) is a perspective view showing a state where the band saw blade holding plate is rotated 180 degrees from the state of (A). It is a perspective view which shows the state which aligns a band saw blade replacement | exchange apparatus in order to demonstrate the procedure which replace | exchanges the band saw blade of a band saw machine using the band saw blade replacement | exchange apparatus of FIG. FIG. 4 is a perspective view showing a state in which the old band saw blade is moved by bringing the band saw blade replacement device close to the band saw machine from the state of FIG. 3. It is a perspective view which shows the state which pulled away the band saw blade exchange apparatus from the band saw machine from the state of FIG. 4, and removed the old band saw blade. It is a perspective view which shows the state which rotated the band saw blade holding plate 180 degree | times from the state of FIG. It is a perspective view which shows the state which makes the band saw blade exchange apparatus adjoin to a band saw machine from the state of FIG. 6, and attaches a new band saw blade. It is a perspective view which shows the state which pulled apart the band saw blade replacement | exchange apparatus from the state of FIG. 7, and completed the replacement | exchange operation | work of a band saw blade. It is a perspective view which shows the application example of the band saw blade exchange apparatus of FIG. It is a perspective view which shows the other application example of the band saw blade exchange apparatus of FIG.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In the present invention, the oval includes an oval (rounded rectangle), an ellipse, and an oval.

  FIG. 1 shows a front view of a band saw blade replacement apparatus 1A according to the present embodiment. This band saw blade exchanging device 1A has a size that can be stored in a predetermined disposal container or the like in order to dispose of facilities or instruments contaminated with radioactive materials or given radioactivity in a radiation treatment facility or nuclear power plant. It is a device that assumes that the band saw blade is to be remotely replaced in the band saw machine to be cut, and is exposed to the upper part of the band saw machine (not shown) while being suspended by a crane means (not shown) and moved in three dimensions. The band saw blade is installed on the drive wheel and the driven wheel.

  Such a band saw blade exchanging device 1A comprises a hanger part 3 constituting the upper side and a stock part 2 constituting the lower side, and the hanger part 3 comprises an arm body 3a bent in a mountain shape and a top part thereof. , 40d (not shown in the figure), 40d and a frame body 3b disposed on the lower end side of the arm body 3a, and the stock portion 2 has an inner periphery of the frame body 3b. It is composed of a horizontally long band saw blade holding plate 20 pivotally supported on the side and provided with holding means on both the front and back sides, and a motor 5 that rotationally drives the plate.

  The hanging rings 40a, 40b, 40c, and 40d of the hanger portion 3 constitute connecting means to which the crane means are connected, and are arranged at equal intervals on a tubular member that forms a cross shape in plan view, and is arranged in a square shape in plan view. The band saw blade replacement device 1A is less likely to swing when suspended by four wires. Further, a wiring 45 passing through the arm body 3a is exposed upward from a substantially intermediate position between the hanging rings 40a and 40b of the arm body 3a, and is connected to an operating means (not shown).

  The band saw blade holding plate 20 of the stock part 2 has a horizontally long holding means that enables an operation of holding a band saw blade (not shown) and an operation of releasing it so as to form a horizontally long oval along the front and back surfaces. Provided on both sides. That is, the holding means includes a plurality of electromagnets 21, 22, and 23 arranged at predetermined positions on the outer edge side of both the front and back surfaces of the band saw blade holding plate 20. A predetermined portion of the outer peripheral surface of the band saw blade is held in an oval shape while being magnetically attracted, and the demagnetization and excitation operations can be performed remotely and separately from each other.

  Further, the center portions of both the left and right ends of the band saw blade holding plate 20 can be rotated about the major axis in the major axis direction via the shafts 51 and 52 on both ends of the downwardly C-shaped frame 3b of the hanger portion 3. While being pivotally supported, as shown in FIG. 2 (B), the motor 5 attached to the pivotally supported portion can be rotated 180 degrees. The motor 5 may be an electric servo motor or a hydraulic motor in consideration of use in water.

  Further, the arrangement of the electromagnets 21, 22, and 23 in the band saw blade holding plate 20 is such that the short diameter of the band saw blade in the state where the band saw blade is held in an oval shape by the magnetic adsorption is installed on the drive wheel and the driven wheel of the band saw blade. It is designed to be slightly larger than the short diameter of the mounted state and slightly longer than the long diameter of the installed state, and when the band saw blade of the band saw machine is attached / detached, the driven wheel is moved to the drive wheel side. In the state, both wheels are supposed to fit inside the substantially oval inner circumferential space formed by all electromagnets, just by performing electromagnet excitation / demagnetization operation and driven wheel movement operation, The band saw blade can be attached and detached easily.

  Next, a procedure for using the band saw blade replacement apparatus 1A of the present embodiment will be described with reference to FIGS. As shown in FIG. 3, a band saw machine 7 which is a target for exchanging a band saw blade using the band saw blade exchanging device 1 </ b> A is supported by a column 3 so as to be slidable in the vertical direction above a base 70. A band saw blade 100A is installed on a drive wheel 71a and a driven wheel 71b disposed on the front side of the head 71, and the drive wheel 71a and the driven wheel 71b are exposed on the front side. Mainly assumed to be compact in configuration. The band saw 7 is provided with a blade edge twisting mechanism that supports the blade edge of the band saw blade downward at the cutting position. However, when the band saw blade is exchanged, the band saw blade 7 is retracted to a position where it does not get in the way. It has become.

  When replacing the worn band saw blade 100A of the band saw machine 7, the band saw blade B of the band saw blade holding plate 20 is not held in a state where the band saw blade replacement device 1A is suspended by a crane means (not shown). The band saw blade 7 is moved so as to be positioned in front of the drive wheel 71a and the driven wheel 71b of the band saw 7 while facing the surface side, and the height of the band saw blade holding plate 20 and its left and right end sides are moved to the drive wheel 71a and the driven wheel 71b. After positioning with respect to the laid band saw blade 100A, it moves so that it may adjoin.

  FIG. 4 shows a state in which the band saw blade holding plate 20 is close to the drive wheel 71a and the driven wheel 71b. The band saw blade holding plate 20 includes a plurality of electromagnets 21, 22, and 23 arranged on the outer peripheral side of the back surface of the band saw blade holding plate 20 (not shown). Since the short diameter of the inner peripheral space is slightly larger than the diameter of the drive wheel 71a, the back surface of the band saw blade holding plate 20 is substantially in close contact with the front surface of the drive wheel 71a while being stored in the left portion of the inner peripheral space. It has become a state.

  On the other hand, since the major axis of the inner circumferential side space is slightly shorter than the major axis of the outer circumference of the drive wheel 71a and the driven wheel 71b, the inner circumferential side space is brought into contact with the electromagnet 21 (not shown) on the front side of the driven wheel 71b. The driven wheel 71b does not fit in the right side of the. Therefore, the driven wheel 71b is moved to the drive wheel 71a side to be in a state when the band saw blade is attached / detached, so that the driven wheel 71b is accommodated in the space on the inner peripheral side, and all the electromagnets 21, 22, and 23 are energized. As a result, the outer peripheral surface side of the band saw blade 100A is attracted and held by the band saw blade 100A and is detached from the drive wheel 71a and the driven wheel 71b.

  Next, as shown in FIG. 5, the band saw blade exchanging device 1A holding the old band saw blade 100A is pulled away from the band saw machine 7 by a predetermined distance, and the motor 5 is driven as shown in FIG. By rotating 180 degrees, the surface side holding the new band saw blade 100B is directed to the drive wheel 71a and the driven wheel 71b of the band saw machine 7.

  Then, as shown in FIG. 7, the empty driven wheel 71b and the drive wheel 71a are brought into close contact with the inner circumferential space of the new band saw blade 100B that is held, and the driven wheel 71b is separated from the drive wheel 71a. As a result, the inner peripheral surface of the band saw blade 100B is in close contact therewith. By demagnetizing all the electromagnets 21, 22, and 23 in this state, the band saw blade 100B is released from the holding state, and the construction of the driven wheel 71b to the drive wheel 71a is completed. As shown in FIG. The exchanging operation of the band saw blade 100A is completed by pulling the exchanging device 1A away from the band saw machine 7.

  As described above, in the present embodiment, the band saw blade replacement device 1A is separated from the band saw machine 7 and the moving operation is performed by the existing crane means, so that the band saw blade can be replaced with the band saw machine. Compared to the conventional example in which the apparatus is integrally provided, a safe and reliable replacement operation of the band saw blade can be realized with a simple configuration with a small number of parts.

  Further, the holding means for the band saw blades 100A, 100B by the electromagnets 21, 22, 23 are provided on both the front and back surfaces of the single band saw blade holding plate 20, and the rotation operation thereof is made possible. Thus, the continuous operation of receiving the old band saw blade 100A of the band saw machine 7 and rotating it 180 degrees and mounting the new band saw blade 100B on the band saw machine 7 from the other holding means becomes possible. Even with an apparatus having a very simple configuration with a minimum number of parts, the replacement operation of the band saw blades 100A and 100B can be completed in a short time, and the cutting operation by the band saw machine 7 can be continued safely and reliably. It is supposed to be.

  FIG. 9 shows a band saw blade replacement apparatus 1B as an application example of the band saw blade replacement apparatus 1A described above. This band saw blade exchanging device 1B is characterized in that alignment poles 32a and 32b for aligning with the band saw 7B are protruded rearward in a part of the hanger portion 3B. Further, in the band saw 7B to which this is applied, guide bodies 72a and 72b having a funnel shape on the inlet side and a cylindrical shape on the back side are disposed at positions corresponding to the positions where the alignment poles 32a and 32b are disposed. The band saw blade replacement device 1B can be easily aligned. A CCD camera may be provided at or near the tips of the alignment poles 32a and 32b so that the operator can perform the alignment operation while checking the images.

  FIG. 10 shows a band saw blade replacement apparatus 1C as an application example that can be applied in common to the band saw blade replacement apparatuses 1A and 1B described above. This example is characterized in that the band saw blade holding plate 20 is formed by attaching electromagnets 26 and 26 that are magnetically attracted to the center position of the drive wheel 71a and the driven wheel 71b (attachment / detachment position) on both the front and back surfaces.

  This makes it easier to accurately align the band saw blade exchanging device 1C with the band saw machine 7C, and also makes it easier to maintain the position aligned by the magnetic force. In addition, the drive wheel 71a and the driven wheel 71b of the band saw 7C to be applied are also provided with magnetically attractable ferromagnetic adhering bodies 76, 76 at the center position, and the periphery thereof is difficult to be magnetically adsorbed. It is preferable to use a raw material.

  In addition, common to all the embodiments and application examples described above, the arrangement of the electromagnets 21 and 21 on both ends in the longitudinal direction of the band saw blade holding plate drives the width of the inner circumferential space in the longitudinal direction by them. The wheel 71a and the driven wheel 71b are arranged so as to be slightly larger than the width on the outer peripheral side when the wheel 71a and the driven wheel 71b are attached, and either or both of the electromagnets 21 and 21 are not slid within a predetermined width range on the inner peripheral side. If this is the case, both the drive wheel 71a and the driven wheel 71b in a state where the band saw blade 100A is installed can be accommodated in the inner circumferential space as it is, and the driven wheel 71b is brought close to the drive wheel 71a side and the lateral width is reduced. It is possible to easily cope with the reduced state of attachment and detachment and to perform the replacement operation smoothly.

  As described above, the band saw blade exchanging apparatus can safely and reliably perform the band saw cutting operation because the band saw blade can be remotely replaced even with a simple configuration with a small number of parts according to the present invention. I was able to continue.

  1A, 1B, 1C band saw blade replacement device, 2 stock section, 3, 3B, 3C hanger section, 5 motor, 7, 7B, 7C band saw machine, 20 band saw blade holding plate, 21, 22, 23, 26 electromagnet, 40a, 40b, 40c, 40d hanging ring, 71a driving wheel, 71b driven wheel, 100A, 100B band saw blade

Claims (3)

A hanger part having a connecting means for connecting the crane means on the upper end side, and a band saw blade holding plate that is connected to the lower side of the hanger part to hold the band saw blade, and is suspended by the crane means A band saw blade exchanging device for exchanging a band saw blade installed on a driving wheel and a driven wheel exposed on the upper part of the band saw machine while being moved in three dimensions,
The band saw blade holding plate has front and back holding means configured to be horizontally long so that an operation of holding the band saw blade and an operation of releasing the band saw blade can be performed so as to form a horizontally long oval along the front and back surfaces of the band saw blade holding plate. The center part of the left and right ends is provided on the side of the hanger so as to be rotatable about the major axis in the major axis direction below the hanger part, and rotated by 180 degrees by a motor attached to the support part. An operation that allows the operation to be performed and moves the old band saw blade to the holding means by holding the surface side not holding the band saw blade close to the driving wheel and driven wheel of the band saw machine from the front, and the old band saw. The band saw blade holding plate holding the blade is rotated 180 degrees so that the surface side holding the new band saw blade is close to the driving wheel and the driven wheel from the front, and the new band saw blade is separated from the holding means. And both operations to be mounted, there is a continuously feasible, the band saw blade exchange device, characterized in that.   Both the holding means of the band saw blade holding plate each include a plurality of electromagnets arranged at predetermined positions on the outer edge side of both the front and back surfaces of the band saw blade holding plate, and the band saw blade on the inner peripheral surface side of each electromagnet A predetermined portion of the outer peripheral surface of the magnet is held in an oval shape while magnetically attracted, and the electromagnet excitation and demagnetization operations can be performed remotely and the front and back operations can be performed separately. The band saw blade replacement apparatus according to claim 1.   The electromagnet is disposed in a state where the band saw blade is held in an oval shape by its magnetic adsorption, and the short diameter of the band saw blade is larger than the short diameter of the band saw blade on the driving wheel and the driven wheel. The major axis is smaller than the major axis in the installed state, and is substantially oval formed by all the electromagnets when the driven wheel is moved to the drive wheel side when the band saw blade of the band saw machine is attached / detached. The band saw blade exchanging device according to claim 2, wherein the two wheels are accommodated in an inner circumferential space.

Images