JP4552030B2 - Circular saw system - Google Patents

Description

  The present invention relates to a circular saw system having a rotating circular saw for cutting a plate material.

  FIG. 14 is a cover as a safety device used in a conventional circular saw system. The cover is movably suspended in a pendulum shape on a support table on which the plate material is placed. The cover moves together with the plate material by being pressed by the plate material. Thereby, the saw blade covered with the cover can come into contact with the plate material, and the cutting of the plate material by the saw blade is started.

  Next, the circular saw system examined by the present inventors will be described with reference to FIG.

  As shown in FIG. 12, a conventional circular saw system 50 includes a support table 52 on which a cutting plate 60 is placed, and a rotation arranged so that a part of the sawtooth 53a protrudes on the support table 52. And a circular saw 53.

  The saw tooth 53a of the rotary circular saw 53 is covered with a safety cover member 54 at a portion of about 80% of its entire length (including substantially all of the portion protruding on the support table 52). One end 54a of the safety cover member 54 is located on the support table 52 as shown in FIG.

  Moreover, as shown in FIG. 13, the safety cover member 54 is formed in a U-shaped cross section. The safety cover member 54 can be rotated and moved in the direction of arrow A in FIG. 12 along the direction of the saw tooth 53 a by an external force by the operator, that is, can be rotated and moved concentrically with the rotating circular saw 53. On the other hand, the safety cover member 54 is urged by a spring or the like in the direction of arrow B in FIG. 12, and after the external force by the operator is removed, the safety cover member 54 returns to the position shown in FIG. A stopper is provided corresponding to the position state shown in FIG.

  Next, the operation of the circular saw system 50 will be described.

  An operator places a plate material 60 such as wood on the support table 52, and slides the plate material 60 toward the saw teeth 53 a of the rotary circular saw 53 on the support table 52. As a result, the plate member 60 comes into contact with the one end 54 a of the safety cover member 54. When the operator further slides and moves the plate member 60 toward the saw teeth 53a of the rotary circular saw 53, the safety cover member 54 is moved in the direction A along with the movement of the plate member 60 (the plate member 60 and the safety cover member 54 are also mutually connected). The plate 60 abuts against the sawtooth 53a. When the operator further slides the plate member 60 toward the saw blade 53a of the rotary circular saw 53, the safety cover member 54 is also moved together with the plate member 60, and the plate member 60 is cut by the saw blade 53a.

  As described above, the safety cover member 54 is installed, so that the safety of the cutting work of the plate material 60 is ensured.

  Further, when any dangerous situation occurs, an emergency stop button 55 for emergency stopping the rotary circular saw 53 can be used.

  As described above, by installing the safety cover member 54, a certain level of work safety can be provided.

  However, the safety cover member 54 moves not only when the plate member 60 is pressed, but also when the operator's hand is pressed. That is, the possibility of cutting the operator's hand instead of the plate material 60 is not sufficiently reduced.

  Further, since the rotary circular saw 53 is generally driven to rotate at a high speed, even if the rotary circular saw 53 is urgently stopped, the rotary circular saw 53 continues to rotate due to inertia for a while. Therefore, it may not be sufficient as a safety measure to stop the rotating circular saw 53 in an emergency when something dangerous occurs.

  The present invention has been made in consideration of such points, and an object of the present invention is to provide a circular saw system that can remarkably improve the safety of cutting work of a plate material.

  The present invention covers a support table on which a cutting plate material is placed, a rotary circular saw arranged so that a part of the sawtooth protrudes on the support table, and a part of the sawtooth of the rotary circular saw. And a safety cover member that can be rotated and moved along the saw blade, and the plate member is slid and moved on the support table toward the saw blade of the rotary circular saw, and the safety cover member is moved to the plate member. , A glove for cutting the plate material while rotating the safety cover member while rotating the safety cover member, an IC tag attached to the glove, an IC tag detection antenna embedded in the support table, and the IC A determination unit configured to determine whether or not a relative positional relationship between the tag and the IC tag detection antenna satisfies a predetermined safety condition; and provided on the safety cover member, based on a determination result of the determination unit A lock member that is unlocked only when the relative positional relationship satisfies the safety condition and allows the rotational movement of the safety cover member, and the lock member is a permanent magnet A circular saw system configured to selectively take a state locked by a magnetic force and a state unlocked by an electromagnetic force exceeding the magnetic force of the permanent magnet.

  According to the present invention, by determining whether or not the relative positional relationship between the IC tag attached to the work gloves and the IC tag detection antenna in the support table satisfies a predetermined safety condition, It can be confirmed that the hand is not present in the danger area. When the operator's hand is present in the dangerous area, that is, when the relative positional relationship does not satisfy the safety condition, the lock member is not unlocked, and the rotational movement of the safety cover member is locked. For this reason, the movement of the plate material is locked accordingly, and the safety of the work is remarkably enhanced.

  Further, according to the present invention, the lock member is configured to selectively take a state where the lock member is locked by the magnetic force of the permanent magnet and a state where the lock is released by an electromagnetic force exceeding the magnetic force of the permanent magnet. Therefore, by eliminating the electromagnetic force for unlocking, the lock member can be instantaneously locked by the magnetic force of a strong permanent magnet. Such a configuration has a remarkable effect in terms of both response speed and locking force.

  Preferably, the IC tag also stores worker ID information. In this case, by detecting the information of the IC tag and specifying the worker, the working time of the worker can be easily recorded. This facilitates so-called labor management and makes it extremely smooth to deal with work accidents.

  Preferably, the IC tag detection antennas are arranged in a matrix on the support table. With such an arrangement, it is possible to grasp the position of the working gloves with higher accuracy, and as a result, it is possible to determine whether or not a predetermined safety condition is satisfied with a higher degree of safety. .

  The present invention also provides a support table on which a cutting plate material is placed, a rotary circular saw arranged so that a part of the sawtooth protrudes on the support table, and a part of the sawtooth of the rotary circular saw And a safety cover member that can be rotated and moved along the saw blade, and the plate member is slid and moved on the support table toward the saw blade of the rotary circular saw. A glove for cutting the plate material while rotating the safety cover member by pressing the plate material, a signal triggering element attached to the glove, and a signal triggering element embedded in the support table A signal detection element for detecting a signal to be transmitted, a determination unit for determining whether a relative positional relationship between the signal inducing element and the signal detection element satisfies a predetermined safety condition, and the safety cover member A lock member that is provided and is based on a determination result of the determination unit, and is unlocked only when the relative positional relationship satisfies the safety condition and allows the safety cover member to rotate. The lock member is configured to selectively take a state where the lock member is locked by the magnetic force of the permanent magnet and a state where the lock is released by an electromagnetic force exceeding the magnetic force of the permanent magnet. This is a circular saw system characterized by that.

  According to the present invention, by determining whether or not the relative positional relationship between the signal inducing element attached to the work gloves and the signal detecting element in the support table satisfies a predetermined safety condition, It can be confirmed that the hand is not present in the danger area. When the operator's hand is present in the dangerous area, that is, when the relative positional relationship does not satisfy the safety condition, the lock member is not unlocked, and the rotational movement of the safety cover member is locked. For this reason, the movement of the plate material is locked accordingly, and the safety of the work is remarkably enhanced.

  Further, according to the present invention, the lock member is configured to selectively take a state where the lock member is locked by the magnetic force of the permanent magnet and a state where the lock is released by an electromagnetic force exceeding the magnetic force of the permanent magnet. Therefore, by eliminating the electromagnetic force for unlocking, the lock member can be instantaneously locked by the magnetic force of a strong permanent magnet. Such a configuration has a remarkable effect in terms of both response speed and locking force.

  Preferably, the signal detection elements are arranged in a matrix on the support table. With such an arrangement, it is possible to grasp the position of the working gloves with higher accuracy, and as a result, it is possible to determine whether or not a predetermined safety condition is satisfied with a higher degree of safety. .

  For example, the signal inducing element is a permanent magnet, and the signal detecting element is a Hall element.

  The present invention also provides a support table on which a cutting plate material is placed, a rotary circular saw arranged so that a part of the sawtooth protrudes on the support table, and a part of the sawtooth of the rotary circular saw And a safety cover member that can be rotated along the saw tooth, a determination unit that determines whether or not a predetermined safety condition is satisfied, and the safety cover member. A lock member that is unlocked and allows rotational movement of the safety cover member only when the safety condition is satisfied based on the determination result of the part, and the lock member includes: A circular saw system configured to selectively take a state locked by a magnetic force of a permanent magnet and a state unlocked by an electromagnetic force exceeding the magnetic force of the permanent magnet. .

  According to the present invention, the lock member is configured to selectively take a state where the lock member is locked by the magnetic force of the permanent magnet and a state where the lock is released by an electromagnetic force exceeding the magnetic force of the permanent magnet. Therefore, by eliminating the electromagnetic force for unlocking, the lock member can be instantly locked by the magnetic force of a strong permanent magnet. Such a configuration has a remarkable effect in terms of both response speed and locking force.

  The present invention also provides a support table on which a cutting plate material is placed, a rotary circular saw arranged so that a part of the sawtooth protrudes on the support table, and a part of the sawtooth of the rotary circular saw And an upper safety cover member that can be rotated along the saw blade and a part of the saw blade of the rotary circular saw, and can be rotated along the saw blade. A lower safety cover member, wherein the upper safety cover member is biased by a first biasing force in a direction in which one end of the upper safety cover member is directed from the top to the bottom of the surface of the support table. The upper safety cover member is positioned in a state where the one end of the upper safety cover member is at the same height as the surface of the support table, and the lower safety cover member has one end of the lower safety cover member Upper safety The bar member is biased by a second biasing force that is weaker than the first biasing force in a direction to abut against the one end of the bar member, and the one end of the lower safety cover member and the one end of the upper safety cover member can abut each other. When the plate material is moved in a state where the front surface of the plate material is in contact with the one end of the upper safety cover member on the support table, the one end of the lower safety cover member is the upper safety cover. The circular saw system is configured to appear on the support table while coming into contact with the rear surface of the plate after being separated from the member.

  According to the present invention, one end of the lower safety cover member appears on the support table while coming into contact with the rear surface of the plate material after being separated from the upper safety cover member. Can also cover the saw blade, and can further increase the safety of work.

  The present invention also provides a support table on which a cutting plate material is placed, a rotary circular saw arranged so that a part of the sawtooth protrudes on the support table, and a part of the sawtooth of the rotary circular saw And an upper safety cover member that can be rotated along the saw blade and a part of the saw blade of the rotary circular saw, and can be rotated along the saw blade. A lower safety cover member, a determination unit for determining whether or not a predetermined safety condition is satisfied, and at least one of the upper safety cover member and the lower safety cover member, and based on a determination result of the determination unit A lock member that is unlocked only when the safety condition is satisfied and allows the upper safety cover member or the lower safety cover member to rotate. In the safety cover member, one end of the upper safety cover member is urged by a first urging force in a direction from above to below the surface of the support table, while the one end of the upper safety cover member is supported by the first urging force. The lower safety cover member is positioned in the same height as the table surface, and the lower safety cover member is positioned in a direction in which one end of the lower safety cover member abuts on the one end of the upper safety cover member. It is urged | biased by the 2nd urging | biasing force weaker than the said 1st urging | biasing force, The said one end of a lower safety cover member and the said one end of an upper safety cover member can contact | abut mutually, The front surface of the said board | plate material is When the plate is moved in contact with the one end of the upper safety cover member on the support table, the one end of the lower safety cover member is the upper safety cover member. The lock member appears on the support table while coming into contact with the rear surface of the plate after being separated, and the lock member is locked by the magnetic force of the permanent magnet and the electromagnetic force exceeding the magnetic force of the permanent magnet. The circular saw system is configured to selectively take a state in which is released.

  According to the present invention, one end of the lower safety cover member appears on the support table while coming into contact with the rear surface of the plate material after being separated from the upper safety cover member. Can also cover the saw blade, and can further increase the safety of work.

  Further, according to the present invention, the lock member is configured to selectively take a state where the lock member is locked by the magnetic force of the permanent magnet and a state where the lock is released by the electromagnetic force exceeding the magnetic force of the permanent magnet. Therefore, it is possible to instantaneously lock the lock member with the magnetic force of the strong permanent magnet by eliminating the electromagnetic force for unlocking. Such a configuration has a remarkable effect in terms of both response speed and locking force.

  The lock member is provided in both the upper safety cover member and the lower safety cover member, and based on the determination result of the determination unit, the lock is released only when the safety condition is satisfied, and the upper safety cover is released. It is preferable to allow rotational movement of both the cover member and the lower safety cover member.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the circular saw system 10 according to the present embodiment is arranged such that a cutting table 30 is placed on a support table 12 and a part of the sawtooth 13 a protrudes on the support table 12. A rotating circular saw 13.

  The saw tooth 13a of the rotary circular saw 13 is covered with a safety cover member 14 at a portion of about 80% of its entire length (including substantially all of the portion protruding on the support table 12). One end portion 14a of the safety cover member 14 is located on the support table 12, as shown in FIG.

  As shown in FIG. 2, the safety cover member 14 is formed in a U-shaped cross section. The safety cover member 14 can be rotated and moved in the direction of arrow A in FIG. 1 along the direction of the saw tooth 13 a by an external force by the operator, that is, can be rotated and concentric with the rotating circular saw 13. On the other hand, the safety cover member 14 is urged by a spring or the like in the direction of arrow B in FIG. 1, and after the external force by the operator is removed, the safety cover member 14 returns to the position shown in FIG. A stopper is provided corresponding to the position state shown in FIG.

  As shown in FIG. 3, an IC tag 21 is attached to each of the left and right fingers of the working gloves 20. The attachment position of the IC tag 21 in the glove 20 is not limited to each finger part, but it is desirable that the number and arrangement be such that the entire position of the glove 20 can be grasped. As shown in FIG. 4, an IC tag detection antenna 12 a is built in the vicinity of the upper surface of the support table 12. In the present embodiment, the IC tag detection antennas 12a are arranged in a 2 × 3 matrix and partially overlap in the vertical direction. Each IC tag detection antenna 12a has a detection surface of φ327 (mm), and the detectable distance of the IC tag 21 at each position in the detection surface is as shown in FIG.

  Each IC tag detection antenna 12 a is connected to the determination unit 16. The determination unit 16 determines the position of the IC tag 21, that is, the left and right gloves 20 based on the detection status of the IC tag 21 by each IC tag detection antenna 12 a based on the relative positional relationship between the IC tag 21 and each IC tag detection antenna 12 a. It comes to recognize. In the present embodiment, the state where both the left and right IC tags 21 are detected is recognized as a safe state that satisfies the safety condition. Other states are not recognized as safe states.

  The safety cover member 14 is provided with a lock member 17. The lock member 17 is configured to selectively take a locked state by a magnetic force of a permanent magnet and a unlocked state by an electromagnetic force exceeding the magnetic force of the permanent magnet. The lock member 17 is connected to the determination unit 16. Based on the determination result of the determination unit 16, the lock member 17 is unlocked only in a safe state that satisfies the safety condition. It is designed to allow rotational movement.

  In addition, 13s is a switch for starting or stopping the rotary circular saw 13, and 15 is an emergency stop button for urgently stopping the rotary circular saw 13.

  Next, the operation of the circular saw system 10 of the present embodiment will be described.

  The operator fits the work gloves 20 on the left and right hands, and places a plate material 30 such as wood on the support table 12. After confirming the safety of the left and right hands, the switch 13s of the rotary circular saw 13 is turned on to rotate the saw teeth 13a of the rotary circular saw 13.

  Subsequently, the operator slides and moves the plate material 30 toward the saw teeth 13 a of the rotary circular saw 13 on the support table 12. As a result, the plate member 30 comes into contact with the one end portion 14 a of the safety cover member 14.

  Here, as shown in FIG. 6, it is assumed that both hands of the operator hold the plate material 30 on the left and right sides of the saw-tooth 13 a corresponding to the arrangement state of the IC tag detection antenna 12 a shown in FIG. 4. In this case, since the IC tag 21 of the glove 20 fitted in both hands of the operator is detected by the IC tag detection antenna 12a of the support table 12, the determination unit 16 recognizes the safety state. Thereby, the lock of the lock member 17 is released, and the rotational movement of the safety cover member 14 is allowed.

  When the operator further slides the plate 30 toward the saw teeth 13a of the rotary circular saw 13, the safety cover member 14 is also moved together with the plate 30 (the plate 30 and the safety cover member 14 also slide slightly). For this reason, it is preferable that a rotation roller or the like is provided at a portion of the one end portion 14a of the safety cover member 14 in contact with the plate member 30). When the operator further slides the plate member 30 toward the saw teeth 13a of the rotary circular saw 13, the safety cover member 14 is also moved together with the plate member 30, and the plate member 30 is cut by the saw teeth 13a.

  If the operator's hands move to a position that does not correspond to the arrangement state of the IC tag detection antenna 12a shown in FIG. 4, the IC tag 21 of the glove 20 fitted to the operator's hands is the IC of the support table 12. It is not detected by the tag detection antenna 12a. At this time, the safety state is not recognized by the determination unit 16. As a result, the lock member 17 is locked and the safety cover member 14 is not allowed to rotate. That is, the rotational movement of the safety cover member 14 is locked, and accordingly, the movement of the plate 30 is also locked. Thereby, the safety | security of board | plate material cutting work is improved notably.

  Further, in the present embodiment, the lock member 17 is configured to selectively take a state where the lock member 17 is locked by the magnetic force of the permanent magnet and a state where the lock is released by an electromagnetic force exceeding the magnetic force of the permanent magnet. Therefore, the lock member 17 can be instantaneously locked by the magnetic force of the strong permanent magnet by eliminating the electromagnetic force for unlocking. Such a configuration has a remarkable effect in terms of both response speed and locking force. In the present embodiment, the permanent magnet of the lock member 17 directly acts on (is directly attracted to) the safety cover member 14.

  In addition, the operation of the switch 13 s of the rotary circular saw 13 is preferably limited based on the position of the glove 20 detected using the IC tag 21. That is, it is preferable that the operation of turning on the switch 13s of the rotary circular saw 13 is allowed only when the glove 20 is in a predetermined position or region. Further, the plate material may be a metal material in addition to wood.

  In FIG. 6, reference numeral 40 denotes an upper safety cover that covers an upper portion of the saw tooth 13 a of the rotary circular saw 13.

  An example of the control flow of the above embodiment is shown in FIG.

  Further, when the IC tag 21 is used as in the present embodiment, it is preferable that worker ID information is also stored in the IC tag 21. In this case, it is possible to identify the worker by detecting the information of the IC tag 21. Thereby, an operator's working time etc. can be recorded easily. This facilitates so-called labor management and makes it extremely smooth to deal with work accidents.

  Next, a circular saw system according to a second embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 8, a permanent magnet 121 as a signal inducing element is attached to each of the left and right finger portions of the working glove 120. The attachment position of the permanent magnet 121 in the glove 120 is not limited to each finger part, but it is desirable that the number and arrangement be such that the entire position of the glove 120 can be grasped. As shown in FIG. 9, a Hall element 112 a as a signal detection element is built in the vicinity of the upper surface of the support table 112. In the present embodiment, the Hall elements 112a are arranged in a 4 × 6 matrix.

  Each Hall element 112 a is connected to the determination unit 16. The determination unit 16 recognizes the positions of the permanent magnets 121, that is, the left and right gloves 120, based on the detection status of the permanent magnets 121 by the hall elements 112a based on the relative positional relationship between the permanent magnets 121 and the hall elements 112a. It has become. In the present embodiment, the state where both the left and right permanent magnets 121 are detected is recognized as a safe state that satisfies the safety condition. Other states are not recognized as safe states.

  Other configurations of the present embodiment are substantially the same as those of the above-described embodiment described with reference to FIGS.

  Next, the operation of the circular saw system of the present embodiment will be described.

  The operator puts work gloves 120 on the left and right hands, and places the plate material 30 such as wood on the support table 112. Further, the switch 13s of the rotary circular saw 13 is turned on to rotate the saw tooth 13a of the rotary circular saw 13.

  Subsequently, the operator slides and moves the plate material 30 toward the saw teeth 13 a of the rotary circular saw 13 on the support table 112. As a result, the plate member 30 comes into contact with the one end portion 14 a of the safety cover member 14.

  Here, as shown in FIG. 6, it is assumed that the hands of the operator hold the plate 30 on the left and right sides of the saw teeth 13a in accordance with the arrangement state of the Hall elements 112a shown in FIG. In this case, since the permanent magnet 121 of the glove 120 fitted to both hands of the operator is detected by the hall element 112a of the support table 112, the determination unit 16 recognizes the safety state. Thereby, the lock of the lock member 17 is released, and the rotational movement of the safety cover member 14 is allowed.

  When the operator further slides the plate 30 toward the saw teeth 13a of the rotary circular saw 13, the safety cover member 14 is also moved together with the plate 30 (the plate 30 and the safety cover member 14 also slide slightly). ), The plate 30 abuts against the sawtooth 13a. When the operator further slides the plate member 30 toward the saw teeth 13a of the rotary circular saw 13, the safety cover member 14 is also moved together with the plate member 30, and the plate member 30 is cut by the saw teeth 13a.

  If both hands of the operator move to a position that does not correspond to the arrangement state of the hall elements 112 a shown in FIG. 9, the permanent magnet 121 of the glove 120 fitted in both hands of the workers is the hall elements 112 a of the support table 112. Will not be detected by. At this time, the safety state is not recognized by the determination unit 16. As a result, the lock member 17 is locked and the safety cover member 14 is not allowed to rotate. That is, the rotational movement of the safety cover member 14 is locked, and accordingly, the movement of the plate 30 is also locked. Thereby, the safety | security of board | plate material cutting work is improved notably.

  Also in the present embodiment, the lock member 17 is configured to selectively take a state where the lock member 17 is locked by the magnetic force of the permanent magnet and a state where the lock is released by an electromagnetic force exceeding the magnetic force of the permanent magnet. Therefore, the lock member 17 can be instantaneously locked by the magnetic force of the strong permanent magnet by eliminating the electromagnetic force for unlocking. Such a configuration has a remarkable effect in terms of both response speed and locking force.

  Next, the circular saw system of the 3rd Embodiment of this invention is demonstrated using FIG.10 and FIG.11.

  As shown in FIG. 10, the saw tooth 13a of the rotary circular saw 13 is covered by the upper safety cover member 141 at a part of about 50% of the entire length, and the lower safety part at a part of about 50% of the total length. Covered by a cover member 142. The upper safety cover member 141 and the lower safety cover member 142 are each formed in a C-shaped cross section, and the lower safety cover member 142 is slightly smaller than the upper safety cover member 141. The upper safety cover member 141 and the lower safety cover member 142 are partially doubled.

  The upper safety cover member 141 can be rotated and moved in the direction of arrow A in FIG. 10 along the direction of the saw tooth 13 a by an external force by the operator, that is, can be rotated and moved concentrically with the rotating circular saw 13. On the other hand, the upper safety cover member 141 has a first biasing force such as a spring in a direction in which one end 141a of the upper safety cover member 141 is directed from the top to the bottom of the surface of the support table 12, that is, in the direction of arrow B in FIG. Is energized by. The upper safety cover member 141 is positioned in a state where the one end 141a of the upper safety cover member 141 is at the same height as the surface of the support table 12 (the position state shown in FIG. 10). Is provided with a stopper). That is, after the external force by the operator is removed, the upper safety cover member 141 returns to the position shown in FIG.

  The lower safety cover member 142 is urged by a spring 150 by a second urging force that is weaker than the first urging force in a direction in which one end 142a of the lower safety cover member 142 abuts on the one end 141a of the upper safety cover member 141. Yes. Further, the one end 142a of the lower safety cover member 142 and the one end 141a of the upper safety cover member 141 are in contact with each other.

  The upper safety cover member 141 and the lower safety cover member 142 are each provided with a lock member 17. The lock member 17 is configured to selectively take a locked state by a magnetic force of a permanent magnet and a unlocked state by an electromagnetic force exceeding the magnetic force of the permanent magnet. The lock member 17 is connected to the determination unit 16, and based on the determination result of the determination unit 16, the lock is released only when the safety condition satisfies the safety condition. The cover member 141 or 142 is allowed to rotate.

  Other configurations of the present embodiment are substantially the same as those of the first embodiment described with reference to FIGS.

  Next, the operation of the circular saw system of the present embodiment will be described.

  The operator puts the work gloves 20 on the left and right hands, and places a plate material 130 such as wood on the support table 12. After confirming the safety of the left and right hands, the switch 13s of the rotary circular saw 13 is turned on to rotate the saw teeth 13a of the rotary circular saw 13.

  Subsequently, the operator slides and moves the plate member 130 toward the saw teeth 13 a of the rotary circular saw 13 on the support table 12. As a result, the plate member 130 contacts the one end portion 141 a of the upper safety cover member 141.

  Here, as shown in FIG. 6, it is assumed that both hands of the operator hold the plate material 130 on the left and right sides of the sawtooth 13a corresponding to the arrangement state of the IC tag detection antenna 12a shown in FIG. In this case, since the IC tag 21 of the glove 20 fitted in both hands of the operator is detected by the IC tag detection antenna 12a of the support table 12, the determination unit 16 recognizes the safety state. As a result, the lock of each lock member 17 is released, and the upper safety cover member 141 and the lower safety cover member 142 are allowed to rotate.

  When the operator further slides the plate member 130 toward the saw teeth 13a of the rotary circular saw 13, the upper safety cover member 141 is also moved together with the plate member 130 (the plate member 130 and the upper safety cover member 141 are also slightly slid from each other). For this reason, it is preferable that a rotation roller or the like is provided at a contact portion of the one end portion 141a of the upper safety cover member 141 with the plate member 130), and the one end 142a of the lower safety cover member 142 is provided with the upper safety cover. It is separated from the member 141 and contacts the lower surface of the plate member 130. When the operator further slides the plate member 130 toward the saw teeth 13 a of the rotary circular saw 13, the one end 142 a of the lower safety cover member 142 comes in contact with the rear surface of the plate member 130 and moves upward above the surface of the support table 12. Coming up. In this way, the plate member 130 is cut by the saw teeth 13a in such a form that the front and rear are sandwiched between the upper safety cover member 141 and the lower safety cover member 142.

  If the operator's hands move to a position that does not correspond to the arrangement state of the IC tag detection antenna 12a shown in FIG. 4, the IC tag 21 of the glove 20 fitted to the operator's hands is the IC of the support table 12. It is not detected by the tag detection antenna 12a. At this time, the safety state is not recognized by the determination unit 16. Thereby, each lock member 17 is locked, and the upper safety cover member 141 and the lower safety cover 142 are not allowed to rotate. That is, the rotational movement of the upper safety cover member 141 and the lower safety cover 142 is locked, and the movement of the plate member 130 is also locked accordingly. Thereby, the safety | security of board | plate material cutting work is improved notably.

  Further, in the present embodiment, each lock member 17 is selectively set in a state where the lock member 17 is locked by the magnetic force of the permanent magnet and a state where the lock is released by an electromagnetic force exceeding the magnetic force of the permanent magnet. Since it is configured, each lock member 17 can be instantaneously locked by the magnetic force of a strong permanent magnet by eliminating the electromagnetic force for unlocking. Such a configuration has a remarkable effect in terms of both response speed and locking force. In the present embodiment, the permanent magnet of each lock member 17 directly acts on (is directly attracted to) each safety cover member 141 or 142.

  Furthermore, in the present embodiment, one end 142a of the lower safety cover member 142 appears on the support table 12 while coming into contact with the rear surface of the plate member 130 after being separated from the upper safety cover member 141, and therefore only the front side of the plate member 130. In addition, the saw teeth 13a can be covered even in the rear, and the safety of work can be further enhanced.

1 is a schematic sectional view of a circular saw system according to a first embodiment of the present invention. Sectional drawing of a safety cover member. Schematic of work gloves. Schematic which shows the arrangement | positioning state of an IC tag detection antenna. The figure explaining the communication characteristic of an IC tag and an IC tag detection antenna. The schematic perspective view explaining the use condition of the circular saw system of this Embodiment. The figure which shows an example of the control flow of the circular saw system of this Embodiment. Schematic of the work glove of the 2nd Embodiment of this invention. Schematic which shows the arrangement | positioning state of a Hall element. The schematic sectional drawing of the circular saw system of the 3rd Embodiment of this invention. The schematic sectional drawing in plate | board material cutting | disconnection of the circular saw system of the 3rd Embodiment of this invention. The schematic sectional drawing of the circular saw system which this inventor examined. Sectional drawing of the safety cover member of FIG. Schematic which shows the safety device of the conventional circular saw system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Circular saw system 12, 112 Support table 12a IC tag detection antenna 13 Rotating circular saw 13a Saw tooth 13s Switch 14 Safety cover part 14a One end part 15 Emergency stop button 16 Discriminating part 17 Lock member 20, 120 Gloves 21 IC tag 30 Plate material 40 Upper part Safety cover 50 Circular saw system 52 Support table 53 Rotating circular saw 53a Saw blade 54 Safety cover member 55 Emergency stop button 60 Plate material 112a Hall element 121 Permanent magnet
130 Plate 141 Upper Safety Cover 141a One End 142 Lower Safety Cover 142a One End 150 Spring Member

Claims (10)

A support table on which a cutting plate is placed;
A rotating circular saw arranged so that a part of the sawtooth protrudes on the support table;
A safety cover member disposed so as to cover a part of the sawtooth of the rotary circular saw and capable of rotating along the sawtooth;
The plate material is slid and moved on the support table toward the sawtooth of the rotary circular saw, and the plate material is pressed against the safety cover member to perform the cutting operation of the plate material while rotating the safety cover member. Gloves and
An IC tag attached to the glove;
An IC tag detection antenna embedded in the support table;
A determination unit for determining whether or not a relative positional relationship between the IC tag and the IC tag detection antenna satisfies a predetermined safety condition;
Based on the determination result of the determination unit provided on the safety cover member, the lock is released only when the relative positional relationship satisfies the safety condition, and the rotational movement of the safety cover member is allowed. A locking member,
With
The lock member is configured to selectively take a locked state by a magnetic force of a permanent magnet and a unlocked state by an electromagnetic force exceeding the magnetic force of the permanent magnet. Circular saw system. The circular saw system according to claim 1, wherein the IC tag also stores worker ID information. The circular saw system according to claim 1 or 2, wherein the IC tag detection antennas are arranged in a matrix on the support table. A support table on which a cutting plate is placed;
A rotating circular saw arranged so that a part of the sawtooth protrudes on the support table;
A safety cover member disposed so as to cover a part of the sawtooth of the rotary circular saw and capable of rotating along the sawtooth;
The plate material is slid and moved on the support table toward the sawtooth of the rotary circular saw, and the plate material is pressed against the safety cover member to perform the cutting operation of the plate material while rotating the safety cover member. Gloves and
A signal-inducing element attached to the glove;
A signal detecting element for detecting a signal embedded in the support table and caused by the signal inducing element;
A determination unit for determining whether or not a relative positional relationship between the signal inducing element and the signal detection element satisfies a predetermined safety condition;
Based on the determination result of the determination unit provided on the safety cover member, the lock is released only when the relative positional relationship satisfies the safety condition, and the rotational movement of the safety cover member is allowed. A locking member,
With
The lock member is configured to selectively take a locked state by a magnetic force of a permanent magnet and a unlocked state by an electromagnetic force exceeding the magnetic force of the permanent magnet. Circular saw system. The circular saw system according to claim 4, wherein the signal detection elements are arranged in a matrix on the support table. The signal inducing element is a permanent magnet,
The circular saw system according to claim 4 or 5, wherein the signal detection element is a Hall element. A support table on which a cutting plate is placed;
A rotating circular saw arranged so that a part of the sawtooth protrudes on the support table;
A safety cover member disposed so as to cover a part of the sawtooth of the rotary circular saw and capable of rotating along the sawtooth;
A discriminator for discriminating whether or not a predetermined safety condition is satisfied;
A lock member provided on the safety cover member, which is unlocked only when the safety condition is satisfied based on the determination result of the determination unit, and allows the safety cover member to rotate. When,
With
The lock member is configured to selectively take a locked state by a magnetic force of a permanent magnet and a unlocked state by an electromagnetic force exceeding the magnetic force of the permanent magnet. Circular saw system. A support table on which a cutting plate is placed;
A rotating circular saw arranged so that a part of the sawtooth protrudes on the support table;
An upper safety cover member arranged to cover a part of the sawtooth of the rotary circular saw and capable of rotating along the sawtooth;
A lower safety cover member disposed so as to cover a part of the sawtooth of the rotary circular saw and capable of rotating along the sawtooth;
With
In the upper safety cover member, one end of the upper safety cover member is urged by a first urging force in a direction from the top to the bottom of the surface of the support table, while the one end of the upper safety cover member is It is positioned in a state where it is at the same height as the surface of the support table,
The lower safety cover member is biased by a second biasing force that is weaker than the first biasing force in a direction in which one end of the lower safety cover member abuts on the one end of the upper safety cover member,
The one end of the lower safety cover member and the one end of the upper safety cover member can contact each other,
When the plate member is moved with the front surface of the plate member abutting on the one end of the upper safety cover member on the support table, the one end of the lower safety cover member is separated from the upper safety cover member. A circular saw system that appears on the support table while abutting against a rear surface of the plate material. A support table on which a cutting plate is placed;
A rotating circular saw arranged so that a part of the sawtooth protrudes on the support table;
An upper safety cover member arranged to cover a part of the sawtooth of the rotary circular saw and capable of rotating along the sawtooth;
A lower safety cover member disposed so as to cover a part of the sawtooth of the rotary circular saw and capable of rotating along the sawtooth;
A discriminator for discriminating whether or not a predetermined safety condition is satisfied;
Provided on at least one of the upper safety cover member and the lower safety cover member, based on the determination result of the determination unit, the lock is released only when the safety condition is satisfied, and the upper safety cover member or the A locking member adapted to allow rotational movement of the lower safety cover member;
With
In the upper safety cover member, one end of the upper safety cover member is urged by a first urging force in a direction from the top to the bottom of the surface of the support table, while the one end of the upper safety cover member is It is positioned in a state where it is at the same height as the surface of the support table,
The lower safety cover member is biased by a second biasing force that is weaker than the first biasing force in a direction in which one end of the lower safety cover member abuts on the one end of the upper safety cover member,
The one end of the lower safety cover member and the one end of the upper safety cover member can contact each other,
When the plate member is moved with the front surface of the plate member being in contact with the one end of the upper safety cover member on the support table, the one end of the lower safety cover member is separated from the upper safety cover member. Appearing on the support table while abutting the rear surface of the plate material,
The lock member is configured to selectively take a locked state by a magnetic force of a permanent magnet and a unlocked state by an electromagnetic force exceeding the magnetic force of the permanent magnet. Circular saw system. The lock member is provided in both the upper safety cover member and the lower safety cover member, and based on the determination result of the determination unit, the lock is released only when the safety condition is satisfied, and the upper safety cover is released. The circular saw system of claim 9, wherein the circular saw system is adapted to allow rotational movement of both the cover member and the lower safety cover member.

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