Article attachment structure used in pliers

Abstract

To provide an article attachment structure used in pliers which is unlikely to hinder work using the pliers when an article, such as a count device or a transmission device, is attached to the pliers.SOLUTION: An article attachment structure 100 is used in pliers P which is formed by coupling two metallic bars P1, P2 at an axis O1 and may open or close freely. The article attachment structure 100 includes: a pair of attachment parts 1, 2 which are respectively attached to the rear sides of a pair of handle parts P5, P6 of the pliers P; and a pair of arms 3, 4 respectively connected to the pair of attachment parts 1, 2. One end of each of the arms 3, 4 is rotatably fixed to the attachment part 1 or 2. The other end of the arm 3 is rotatably fixed to the other end of the other arm 4. As the pliers P open or close, a space between the pair of arms 3, 4 opens or closes.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to an article mounting structure used for a plier tool that connects two metal bars with a shaft and can be freely opened and closed.

Background Art

[0002] As an operation using a plier tool, for example, there is tightening of a hose clip. And by counting the number of times the plier is opened and closed in this operation, management is performed to check if the operation has been forgotten. As plier tools having a function of counting such operation times, those such as Patent Document 1 and Non-Patent Document 1 are known. On the other hand, dedicated plier tools such as those in Patent Document 1 and Non-Patent Document 1 are naturally more expensive than ordinary plier tools.

[0003] Also, such plier tools are not generally used alone, but a large number of them are used simultaneously in a factory, and by transmitting the respective count numbers, each operation is managed as a whole. That is, as also described in the plier tools of Patent Document 1 and Non-Patent Document 1, they are equipped with not only a counting function but also a transmitting function, and are used as a management system including a management device as a whole. Therefore, for example, if an attempt is made to change a dedicated plier tool to one of another manufacturer, the entire management system also needs to be changed. Therefore, it is less costly to retroactively attach a counting device and a transmitting device to an existing plier tool rather than using a dedicated plier tool equipped with a counting function.

[0004] As an invention of retroactively attaching such a counting device to an existing plier tool, as shown in FIG. 4 of Patent Document 2, an invention in which a counting device (portable wireless transmitting means 1) is directly attached to the handle of a plier tool (pliers) is known. Also, as in Patent Document 3, an invention in which a counting device (monitoring unit 7) is directly attached to the end of one handle (lower plier handle 3) of a plier tool is known.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Patent Document 3

Non - Patent Documents

[0006]

Non - Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] However, as shown in FIG. 4 of Patent Document 2, if a counting device is directly attached to the handle of a plier tool, it will interfere with the work. In particular, the sizes of plier tools vary, and when the tool is small, it becomes even more obstructive to the work. Also, there are various types of plier tools. For plier tools whose main purpose is cutting, such as so - called nippers, they will close completely. However, for plier tools whose main purpose is gripping, such as so - called radio pliers, the closing gap will vary depending on the object being gripped, so it will also interfere with the work when closing only part - way.

[0008] Also, if a counting device is directly attached to one end of the handle of a plier tool as in Patent Document 3, it is likely to interfere with the work when used with a small tool. Also, if the plier tool falls, there is a risk of failure if an impact is directly applied to the counting device. Further, the plier tool of Patent Document 3 is a plier tool such as a so-called crimping plier from the description in paragraph

[0017] and is used for crimping, so when in use, it is in a substantially fully closed state, and counting can be performed in that state. However, in the case of a plier tool such as a radio plier where the closing gap varies depending on the object being grasped, the gap for counting also changes depending on the object being grasped, so it is necessary to adjust in which state to count, but this is not assumed in the plier tool of Patent Document 3.

[0009] Furthermore, the articles attached to the existing plier tools as described above are a counting device and a transmitting device, but in addition to these, for example, a light emitting device, a display device, an audio output device, etc. can also be considered. However, with a configuration such as that of Patent Document 3, it is not possible to attach multiple types of articles.

[0010] Also, a structure with a counting device or a transmitting device provided on the tip side rather than the handle part, as in Non-Patent Document 1, becomes an obstruction when working in a narrow space, and when working with the plier tool placed in a space surrounded by metal, there is also a risk that the transmitted radio wave will be shielded by the metal space.

[0011] Therefore, an object of the present invention is to provide an article attachment structure for use with a plier tool that is less likely to interfere with the work when articles such as a counting device and a transmitting device are attached to the plier tool. Another object is to provide an article attachment structure for use with a plier tool that can secure a sufficient attachment location without interfering with the work when attaching articles such as a counting device and a transmitting device to the plier tool.

Means for Solving the Problems

[0012] The article mounting structure used in the plier tool of the present invention for solving the above problems is an article mounting structure used for a plier tool in which two metal bars are connected by a shaft and can be freely opened and closed. It comprises a pair of mounting parts respectively mounted behind a pair of handle parts of the plier tool, and a pair of arms respectively connected to the pair of mounting parts. One end of each arm is rotatably fixed to the mounting part, and the other end of one arm is rotatably fixed to the other end of the other arm. Along with the opening and closing operation of the plier tool, the space between the pair of arms is opened and closed, which is characterized by this.

[0013] According to the configuration of the present invention, since the article mounting structure is formed behind the handle part of the plier tool, it is less likely to interfere with the work. Also, by attaching an article to the arm, a sufficient mounting place can be secured. Further, instead of directly attaching an article behind the plier tool, it is attached via an article mounting structure configured such that the space between the arms is opened and closed. Thus, the impact during dropping can be absorbed by this opening and closing rotation, and the attached article is more resistant to the impact of dropping. Also, since the article is attached behind the plier tool, for example, even when the article is a transmission device, even in a space where the side where the plier tool is inserted for work is surrounded by metal, it is possible to reduce the situation where the transmission is shielded.

[0014] Moreover, in the article mounting structure used in the plier tool of the present invention, it is preferable that a limit switch is fixed to one of the arms, and along with the opening and closing of the pair of arms, a pressing part is provided which slides on the surface of one of the arms to press the movable part of the limit switch.

[0015] According to the configuration of the present invention, as the opening and closing operation of the plier tool is performed, the limit switch is pressed, so that the operator does not need to perform a counting operation deliberately. Further, since the pressing portion presses the movable portion of the limit switch by sliding, even when a force stronger than expected is applied, breakage of the pressing portion and the limit switch can be prevented. In such a configuration, not only one limit switch but also two limit switches may be used and fixed respectively in front of and behind the sliding pressing portion.

[0016] Further, in the article attachment structure used for the plier tool of the present invention, it is preferable that a limit switch is fixed to one of the arms, and a pressing portion that presses the movable portion of the limit switch is provided on the other arm as the pair of arms open and close. According to the configuration of the present invention, as the opening and closing operation of the plier tool is performed, the limit switch is pressed, so that the operator does not need to perform a counting operation deliberately.

[0017] Further, in the article attachment structure used for the plier tool of the present invention, it is preferable that the pressing portion can adjust the timing of pressing the movable portion according to the opening and closing interval of the pair of arms. According to the configuration of the present invention, the timing of counting can be adjusted according to the work using the plier tool.

[0018] Further, in the article attachment structure used for the plier tool of the present invention, it is preferable that a transmission device is further fixed to one of the arms, and the limit switch and the transmission device fixed to one of the arms are respectively fixed to the opposing surfaces of the arm. Thereby, the limit switch and the transmission device can be efficiently fixed to one arm.

Brief Description of the Drawings

[0019]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Mode for Carrying Out the Invention

[0020] Hereinafter, the mode for carrying out the present invention will be described with reference to embodiments and drawings. However, the following embodiments are not intended to limit the present invention to those described herein, and the present invention can be equally applied to those with various modifications without departing from the technical idea shown in the claims. In each drawing used for the description in this specification, in order to make each member recognizable on the drawing, the scale is made different for each member, and it is not necessarily shown in proportion to the actual dimensions.

[0021] [Embodiment] The configuration of the main part of this embodiment will be described with reference to FIGS. 1 to 3. FIGS. 1A and 1B are perspective views showing the state in which the article attachment structure 100 is attached to the plier tool P, with different viewing directions. FIG. 1C is a front view showing the state in which the article attachment structure 100 is removed from the plier tool P. FIG. 2 is an auxiliary view for showing the configuration in which the pressing part 6 slides. FIG. 2A is a perspective view of the pressing part 6, FIG. 2B is a perspective view of the first arm 3, and FIG. 2C is a cross-sectional view showing the engagement between the pressing part 6 and the first arm 3. FIG. 3 is a view for showing the opening and closing operation of the article attachment structure 100. FIG. 3A is a front view showing the state in which the article attachment structure 100 is open, and FIG. 3B is a front view showing the state in which the article attachment structure 100 is closed.

[0022] First, the present invention is an article attachment structure used for a plier tool in which two metal bars are connected by a shaft and can be freely opened and closed. Examples of such plier tools include pliers, nippers, hose clips, combination pliers, yatco, cutters, crimping pliers, plier wrenches, snap ring pliers, etc., which are used for various operations.

[0023] As shown in FIGS. 1 to 3, the plier tool P has a shape with the movable shaft of a combination plier as the fixed shaft and is a commercially available product. In this plier tool P, the first bar P1 and the second bar P2 intersect and are pivotally supported so as to be rotatable about the first axis O1 at the intersection. One end side of the first bar P1 is the first jaw part P3, one end side of the second bar P2 is the second jaw part P4, the other end side of the first bar P1 is the first handle part P5, and the other end side of the second bar P2 is the second handle part P6. Then, by sandwiching the work object between the first jaw part P3 and the second jaw part P4 and opening and closing the first handle part P5 and the second handle part P6, the first jaw part P3 and the second jaw part P4 are opened and closed. The article attachment structure 100 of this embodiment is used for such a plier tool P.

[0024] This article mounting structure 100 includes a pair of mounting parts (first mounting part 1 and second mounting part 2) respectively mounted behind a pair of handle parts (first handle part P5 and second handle part P6) of the plier tool P, and a pair of arms (first arm 3 and second arm 4) respectively connected to the pair of mounting parts. One end of each arm is rotatably fixed to the mounting part (one end of the first arm 3 is fixed to the first mounting part 1 via the second shaft O2, and one end of the second arm 4 is fixed to the second mounting part 2 via the third shaft O3). The other end of each arm is rotatably fixed to the other end of the other arm (the other end of the first arm 3 is fixed to the other end of the second arm 4 via the fourth shaft O4). Along with the opening and closing operation of the plier tool P, the space between the first arm 3 and the second arm 4 is configured to open and close.

[0025] More specifically, as shown in FIGS. 1 to 3, the article mounting structure 100 includes a first mounting part 1, a second mounting part 2, a first arm 3, a second arm 4, a limit switch 5, a pressing part 6, a third arm 7, a transmitting part 8, second shaft O2 to sixth shaft O6, and a binding band 9.

[0026] The first mounting part 1 is mounted behind the first handle part P5. As shown in FIGS. 1B and 1C, it includes a fixed block located along the inner side (the side facing the second handle part P6) of the first handle part P5 and a shaft forming block located at the rear end of the first handle part P5.

[0027] Two angular holes 11 are provided in the fixed block of the first mounting part 1. By passing the binding band 9 through these angular holes 11, the first mounting part 1 is mounted on the first handle part P5 of the plier tool P. Also, one end of the shaft forming block of the first mounting part 1 and one end of the first arm 3 are pivotally supported by the second shaft O2 so as to be rotatable.

[0028] The second mounting part 2 is the same as the first mounting part 1. By passing the binding band 9 through two angular holes 21 provided in the fixed block of the second mounting part 2, the second mounting part 2 will be mounted on the second handle part P6 of the plier tool P. Also, one end of the shaft forming block of the second mounting part 2 and one end of the second arm 4 are pivotally supported by the third shaft O3 so as to be rotatable.

[0029] The first arm 3 and the second arm 4 are rod-shaped members and serve as attachment locations for various articles such as the limit switch 5 and the transmission unit 8 as in the present embodiment. Further, one end of each of the first arm 3 and the second arm 4 is bent as shown in FIG. 1C, and at this bent portion, they are pivotally supported by the fourth axis O4 so as to be rotatable. Then, as shown in FIG. 1C, the limit switch 5 is attached to one side surface of the first arm 3.

[0030] The limit switch 5 is an example of an article to be attached to the article attachment structure in the present invention, is a commercially available small-sized one, and has a hinge lever type. As shown in FIGS. 1C and 3A, this limit switch 5 includes a movable part composed of a plunger 51 that moves up and down to turn on / off energization, and a lever 53 whose one end is held by a fulcrum 52. When the other end side of the lever 53 is pressed by the pressing part 6, the plunger 51 is pushed by the elastic deformation or rotation of the lever 53. By this movement, the energization is switched from OFF to ON. Then, when the pressing of the lever 53 by the pressing part 6 is released, the lever 53 returns to its original position and the energization becomes OFF.

[0031] As described above, this pressing part 6 is a sliding body that presses the lever 53 of the limit switch 5. Specifically, as shown in FIG. 2A, this pressing part 6 is composed of an L-shaped member consisting of a long side and a short side, a rib 61 is provided along the long side, and a shaft 62 consisting of a screw is provided at the end of the short side. On the other hand, as shown in FIG. 2B, on the first arm 3 composed of a rod-shaped member, along the extending direction of the first arm 3, a guide 31 into which the rib 61 of the pressing part 6 is fitted and a long hole 32 into which the shaft 62 of the pressing part 6 is fitted are provided.

[0032] Then, when the rib 61 and the shaft 62 of the pressing part 6 are fitted into the guide 31 and the long hole 32 of the first arm 3, this pressing part 6 can slide in the extending direction of the first arm 3 on the inner surface of the first arm 3 (the surface facing the second arm 4). Further, as shown in FIG. 3B, an adjustment screw 63 is screwed into the long-side end of the pressing portion 6.

[0033] Therefore, when the pressing portion 6 slides in the direction of the limit switch 5 (by changing from FIG. 3A to FIG. 3B), the head 63a of the adjustment screw 63 comes into contact with and presses the lever 53. Note that by adjusting the screwing depth of the adjustment screw 63, the timing of pressing the limit switch 5 by the pressing portion 6 can be adjusted.

[0034] The third arm 7 is a rod-shaped member, and as shown in FIG. 1, it is shorter than the first arm 3 and the second arm 4. One end of the third arm 7 is pivotally supported by a fifth shaft O5 at a position near the fourth shaft O4 of the second arm 4 as shown in FIG. 1, and the other end is pivotally supported by a sixth shaft O6 at the bent position of the pressing portion 6 of the L-shaped member. Since the pressing portion 6 slides in the extending direction of the first arm 3, the sixth shaft O6 also slides in the extending direction of the first arm 3. Note that the reference sign S shown in FIG. 3 indicates the slide line along which the sixth shaft O6 slides.

[0035] As shown in FIG. 1, the transmission unit 8 is attached to the side surface of the first arm 3 on the side opposite to the attachment side of the limit switch 5. This transmission unit 8 is an example of an article to be attached to the article attachment structure in the present invention, and incorporates a battery serving as a power source (not shown), a transmission board, a control board, etc. inside the case. Also, since both the transmission unit 8 and the limit switch 5 are attached to the first arm 3, they are located close to each other and are electrically connected to each other via short wiring (not shown). Then, this transmission unit 8 receives an ON / OFF signal due to energization from the limit switch 5 via the wiring, counts the number of ON / OFF times, and transmits the count information to a receiving device of a predetermined management system (not shown).

[0036] Thus, in this embodiment, a counting device for counting the number of operations of the plier tool P is configured by the limit switch 5, the pressing portion 6, and the transmitting portion 8, and the transmitting portion 8 constitutes a transmitting device.

[0037] The limit switch 5 and the transmitting portion 8 are attached to the first arm 3 shown in FIG. 2A. Specifically, the limit switch 5 is fixed to the switch mounting portion 33 of the first arm 3 with screws, and the transmitting portion 8 is fixed to the transmitting mounting portion 34 provided on the opposite side surface with screws.

[0038] Next, the opening and closing operations of the article mounting structure 100 having such a configuration will be specifically described with reference to FIG. 3. FIG. 3A is a front view showing the state where the article mounting structure 100 is open, and FIG. 3B is a front view showing the state where the article mounting structure 100 is closed. As can be seen from FIG. 3, the opening and closing operations of the article mounting structure 100 are performed in conjunction with the opening and closing of the plier tool P.

[0039] When the plier tool P attempts to close from the open state (the handle portion P5 moves in the direction of arrow S1 in FIG. 3A and the handle portion P6 moves in the direction of arrow S2), the position of the second axis O2 rotates about the first axis O1 and moves in the direction of arrow S1. Also, the position of the third axis O3 rotates about the first axis O1 and moves in the direction of arrow S2.

[0040] As a result, the distance between the second axis O2 and the third axis O3 decreases, so it rotates in the closing direction (the direction in which the distance between the first arm 3 and the second arm 4 decreases) between the first arm 3 and the second arm 4. Therefore, the position of the fourth axis O4 moves in the direction of arrow S3 in FIG. 3A and moves away from the first axis O1.

[0041] When the position of the third axis O3 moves in the direction of arrow S2, the fifth axis O5 rotates accordingly, and the third arm 7 moves in the direction of arrow S4. At this time, the sixth axis O6 also rotates, but the position of the sixth axis O6 moves in the direction toward the second axis O2 on the first arm 3, like the slide line S. Then, with the rotation of the sixth axis O6, the pressing portion 6 also slides in the direction toward the second axis O2 on the first arm 3, and energizes the limit switch 5 to ON at a predetermined timing.

[0042] When trying to open the plier tool P from the closed state (the handle portion P5 moves in the direction of arrow S5 in Fig. 3B, and the handle portion P6 moves in the direction of arrow S6), it will move in the opposite direction to that in Fig. 3A.

[0043] That is, the position of the second axis O2 rotates in the opposite direction around the first axis O1 and moves in the direction of arrow S5. Also, the position of the third axis O3 rotates in the opposite direction around the first axis O1 and moves in the direction of arrow S5. As a result, the distance between the second axis O2 and the third axis O3 increases, so it rotates in the opening direction (the direction in which the distance between the first arm 3 and the second arm 4 increases) between the first arm 3 and the second arm 4. Therefore, the position of the fourth axis O4 moves in the direction of arrow S7 in Fig. 3B and approaches the first axis O1.

[0044] When the position of the third axis O3 moves in the direction of arrow S6, the fifth axis O5 rotates in the opposite direction accordingly, and the third arm 7 moves in the direction of arrow S8. At this time, the sixth axis O6 also rotates in the opposite direction, but the position of the sixth axis O6 moves in the direction toward the fourth axis O4 on the first arm 3, like the slide line S. Then, with the rotation of the sixth axis O6, the pressing portion 6 also slides in the direction toward the fourth axis O4 on the first arm 3, and de-energizes the limit switch 5 to OFF at a predetermined timing.

[0045] Thus, the article mounting structure 100 of the present embodiment used for the plier tool P is formed behind the handle portions P5 and P6 of the plier tool P, so it is less likely to interfere with the work. Also, by attaching an article to the first arm 3 and the second arm 4, a sufficient mounting location can be secured. Further, instead of directly attaching an article behind the plier tool P, the attachment is through the article mounting structure 100 configured to open and close between the first arm 3 and the second arm 4. Thus, the impact during dropping can be absorbed by this opening and closing rotation, and the attached article is more resistant to the impact of dropping. Also, since the article is attached behind the plier tool P, for example, even when the article is a transmission device including the transmission unit 8 as in the present embodiment, or even in a space where the side where the plier tool P is inserted and work is done is surrounded by metal, it is possible to reduce the occurrence of the transmission performed at the rear being shielded.

[0046] Further, in the article mounting structure 100 of the present embodiment, the pressing portion 6 does not directly press the lever 53 of the limit switch 5 from above, but is configured to press the lever 53 of the limit switch 5 laterally by sliding. Therefore, in the case where a force stronger than expected is applied, if pressed directly from above, the pressing portion 6 and the limit switch 5 may directly collide and either or both of them may be damaged. However, with the configuration of the present embodiment, since it is a lateral pressing by sliding, the pressing portion 6 and the limit switch 5 do not directly collide and the destruction of both can be prevented.

[0047] Also, in the article mounting structure 100 of the present embodiment, the pressing portion 6 has a structure that can adjust the timing of pressing the lever 53 according to the opening and closing interval between the pair of arms 3 and 4. Specifically, by adjusting the screwing depth of the adjustment screw 63 at the long side end of the pressing portion 6, the timing at which the pressing portion 6 presses the lever 53 can be adjusted.

[0048] For example, when clamping a large object with the plier tool P, the distance between the pair of arms 3 and 4 when clamping is wide. In order for the pressing portion 6 to press the lever 53 at this timing, the screwing depth of the adjustment screw 63 is made shallow, that is, the adjustment screw 63 is protruded as much as possible from the long-side end portion.

[0049] Conversely, when clamping a small object with the plier tool P, the distance between the pair of arms 3 and 4 when clamping becomes narrow. In order for the pressing portion 6 to press the lever 53 at this timing, the screwing depth of the adjustment screw 63 is made deep, that is, the adjustment screw 63 is screwed into the long-side end portion as much as possible.

[0050] Further, in the article mounting structure 100 of the present embodiment, since the limit switch 5 and the transmission unit 8 are fixed to the opposing surface of the first arm 3, the limit switch 5 and the transmission device 8 can be efficiently fixed and wired on the first arm 3.

[0051] In addition, in the above-described embodiment, the limit switch is pressed by the sliding method of the pressing portion 6, but the present invention is not limited to such a sliding method. For example, a limit switch may be attached to one arm, a pressing portion capable of adjusting the length may be provided on the other arm, and when both arms are closed, the pressing portion may directly press the limit switch from above.

[0052] This specific example is shown in FIG. 4. FIG. 4 is a plan view showing an article mounting structure 100A of another embodiment. In the article mounting structure 100A of this embodiment, the same reference numerals are given to the parts having the same configuration as those of the article mounting structure 100, and the detailed description thereof is omitted, and the suffix "A" is added to the reference numerals for the parts having the same name but different configurations.

[0053] The article attachment structure 100A has a limit switch 5 fixed to the first arm 3A which is one of the arms, and a pressing portion 6A for pressing the lever 53 of the limit switch 5 is fixed to the second arm 4A which is the other arm. And, as the first arm 3A and the second arm 4A open and close, the pressing portion 6A is configured to press the lever 53.

[0054] Also, as shown in FIG. 4, the pressing portion 6A is composed of a cylindrical member fixed to the second arm 4A, and an adjustment screw 63A is screwed into this cylindrical member. And, by adjusting the screwing depth of this adjustment screw 63A, the timing at which the pressing portion 6A contacts the limit switch 5 can be adjusted.

[0055] Next, a modification of this embodiment will be described with reference to the drawings. FIG. 5 is a plan view showing the article attachment structure 100B of this modification. In the article attachment structure 100B of this modification, the same reference numerals are given to the parts having the same configuration as the article attachment structure 100, and the detailed description thereof is omitted, and a suffix "B" is added to the reference numerals for the parts having the same name but different configurations.

[0056] The article attachment structure 100B which is this modification has two limit switches 5, 5B fixed to the first arm 3B which is one of the arms. Among these two limit switches 5, 5B, the limit switch 5 is attached to the tip side of the first arm 3B, that is, the side of the second axis O2, in the same manner as the article attachment structure 100. On the other hand, the limit switch 5B is attached to the rear end side of the first arm 3B, that is, the side of the fourth axis O4, on the contrary. Also, the attachment direction of the limit switch 5B is opposite to that of the limit switch 5, that is, the lever 53B held by the fulcrum 52B is in the direction of extending toward the fourth axis O4 side.

[0057] And the pressing part 6B that presses these two limit switches 5 and 5B is composed of an L-shaped member consisting of a long side and a short side. As shown in FIG. 5, a adjusting screw 63 is screwed into the tip of the long side end in the same manner as the article mounting structure 100. On the other hand, a adjusting screw 63B is screwed into the rear tip of the short side end.

[0058] As described above, the article mounting structure 100B of this modification example adds one more article to the limit switch 5 that was mounted in front of the pressing part 6 in the article mounting structure 100, and has a configuration in which two limit switches 5 and 5B are mounted in front of and behind the pressing part 6B.

[0059] When the plier tool P attempts to close from the open state with such a configuration of the article mounting structure 100B, the space between the first arm 3B and the second arm 4 rotates in the closing direction, the pressing part 6B slides in the direction toward the second axis O2, and energization of the limit switch 5 is turned ON at a predetermined timing.

[0060] On the contrary, when the plier tool P attempts to open from the closed state, the space between the first arm 3B and the second arm 4 rotates in the opening direction, the pressing part 6B slides in the direction toward the fourth axis O4, and energization of the limit switch 5B is turned ON at a predetermined timing.

[0061] That is, the article mounting structure 100B of this modification example can turn ON the energization of the limit switch 5 and the limit switch 5B at both timings when the space between the first arm 3B and the second arm 4 is closed and when it is open.

[0062] As for the use of the article mounting structure 100B with such a configuration, for example, when using a so-called snap ring plier as the plier tool P, it is conceivable. The snap ring plier is usually used when attaching and detaching a C-shaped retaining ring to a shaft or a hole. Similar to pliers and nippers, there are those for holes where the tip closes when grasped, and those for shafts where the tip opens when grasped in the opposite way and closes when the grip is loosened. Since the article mounting structure 100B can detect both the grasped state and the loosened grip state by the limit switches 5 and 5B respectively, it can correspond to the count of the number of operations regardless of whether it is a snap ring plier for holes or for shafts.

[0063] As described above, since the article mounting structure of the present invention is formed behind the handle portion of the plier tool, it is less likely to interfere with the work. Also, by attaching an article to the pair of arms, a sufficient mounting place can be secured.

[0064] In the above embodiment, the pair of mounting portions (the first mounting portion 1 and the second mounting portion 2) respectively mounted behind the pair of handle portions P5 and P6 of the plier tool P were configured to be fixed to the handle portions through the binding band 9 passed through the square holes 11 and 21 provided in the fixed block. However, it may be fixed to the handle portion by a method other than fixing through the binding band 9. For example, the configuration of the mounting portion may be a cylindrical configuration, and the handle portion may be inserted into the cylindrical side mounting portion and fixed. Also, a configuration in which it is fixed by a screw or a fitting structure instead of the binding band 9 may be used.

[0065] Also, in the present embodiment, the attachment of each article including the limit switch 5 and the transmission unit 8 to the first arm 3 was by fixing with screws to the switch attachment portion 33 and the transmission attachment portion 34. However, other than screws, for example, fixing by a fitting structure or fixing using a binding band may be used.

[0066] In addition, regarding the article attached to the arm, in this embodiment, it was the limit switch 5 and the transmission unit 8. However, in addition to these, for example, a light-emitting device, a display device, or an audio output device for alerting the user may also be used. Further, not only transmission by the transmission unit 8 but also a reception device may be used as an article so that information can be received.

[0067] Moreover, the limit switch 5 of this embodiment had a movable part including a plunger 51 and a lever 53 whose one end was held by a fulcrum 52. However, the configuration of the movable part is not limited to such a limit switch, and a configuration having a movable part with only the plunger 51 without the lever 53 may also be used. Also, of course, the shapes of the plunger 51 and the lever 53 are not limited to the illustrated shapes.

[0068] In addition, the transmission unit 8 of this embodiment has a counting function. However, the transmission unit may transmit ON / OFF information of energization without having a counting function, and counting may be performed on the receiving side.

Explanation of Reference Numerals

[0069] 100, 100A, 100B: Article mounting structure 1: First mounting part 2: Second mounting part 3, 3A, 3A: First arm 4, 4A: Second arm 5, 5B: Limit switch 6, 6A, 6B: Pressing part 7: Third arm 8: Transmission unit O1~O6: First axis~Sixth axis P: Plier tool P5, P6: Handle part

Claims

1. An article mounting structure for use in a plier tool in which two metal bars are axially connected and can be freely opened and closed, A pair of mounting parts respectively mounted behind a pair of handle parts of the plier tool, A pair of arms respectively connected to the pair of mounting parts, Comprising, One end of the arm is respectively rotatably fixed to the mounting part, The other end of the arm is rotatably fixed to the other end of the other arm, An article mounting structure for use in a plier tool, characterized in that the space between the pair of arms opens and closes as the plier tool opens and closes.

2. A limit switch is fixed to one of the arms, An article mounting structure for use in the plier tool according to claim 1, characterized in that a pressing part is provided which slides on the surface of one of the arms and presses the movable part of the limit switch as the pair of arms open and close.

3. A limit switch is fixed to one of the arms, An article mounting structure for use in the plier tool according to claim 1, characterized in that a pressing part for pressing the movable part of the limit switch is provided on the other arm as the pair of arms open and close.

4. The article mounting structure for use in the plier tool according to any one of claims 2 or 3, characterized in that the pressing part can adjust the timing of pressing the movable part according to the opening and closing interval of the pair of arms.

5. A transmission device is further fixed to one of the columnar fixing parts, The limit switch fixed to one of the arms and the transmission device are respectively fixed to the opposing surfaces of the arm. An article mounting structure for use in the plier tool according to any one of claims 2 or 3.

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