JP3236864U - Work tools - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work tool capable of reducing manufacturing cost. SOLUTION: The handle portion 2 is provided with a handle portion 2 that is opened and closed by a gripping operation by a user, and a head portion 3 that opens and closes and acts on a work object when the handle portion 2 is opened and closed. 2 has a combination of the engaging portion 251 and the engaged portion 252 that prevents the handle portion 2 from opening by engaging with the engaging portion 251 in a closed state of the handle portion 2. It is a work tool provided with a ratchet mechanism 25 capable of holding the head portion 3, and the head portion 3 is detachable from the handle portion 2. [Selection diagram] Fig. 3

Description

The present invention relates to a work tool such as pliers, which is operated by a user's grip operation.

Work tools have various functions and shapes depending on the work application. For example, pliers, needle-nose pliers, nippers, crimping tools, screw removers, and the like have been commercialized as those that exhibit the functions of grasping, cutting, and turning. In addition, there are numerous sizes and shapes of work tools, such as overall length, thickness, and shape (to suit the object).

Since these work tools are generally made by combining parts manufactured using dies such as forging, casting, and pressing, high mold making costs are incurred. When making one tool, a mold of a size corresponding to the total length of each part is required. In addition, a processing jig that matches the size of the work tool is required. Due to these causes, high manufacturing costs were incurred.

Therefore, the present invention aims to provide a work tool that can reduce the manufacturing cost.

The present invention includes a handle portion that is opened and closed by a user's grip operation, and a head portion that opens and closes when the handle portion is opened and closed and acts on a work object when the handle portion is closed. A ratchet mechanism capable of holding a closed state of the handle portion by having a combination of a joint portion and an engaged portion that prevents the handle portion from opening by engaging with the engaging portion is provided. A work tool whose head portion is removable from the handle portion.

According to this configuration, the ratchet mechanism can hold the closed state of the handle portion, so that the user can easily perform the work, and the head portion can be attached and detached, so that the handle portion can be shared.

The ratchet mechanism can maintain the closed state of the handle portion by continuing the engagement between the engaged portion and the engaged portion until the handle portion is fully closed. It's okay.

According to this configuration, since the ratchet mechanism operates from the start of closing the handle portion to the fully closed state, it is possible to work by fixing the opening degree of the handle portion in a desired closed state.

Then, the ratchet mechanism is provided with a disengaging mechanism for disengaging the engaging portion from the engaged portion, and the ratchet mechanism is in the middle of closing the handle portion or due to the operation of the disengaging mechanism. It may be in the released state from the start of the closing operation of the handle portion.

According to this configuration, the ratchet mechanism can be released by operating the release mechanism at any time, so it is convenient when a large force is not required or when continuous work is desired and the ratchet mechanism is not required. ..

The handle portion includes a pair of handle pieces that are rotatably connected, and the head portion includes a pair of rotating pieces and a connecting piece that rotatably connects the pair of rotating pieces. The connecting piece connects each of the pair of rotating pieces at different positions, and one of the pair of rotating pieces is opened and closed by one of the pair of handle pieces, and the pair of rotating pieces is opened and closed. The other of the rotating pieces may be opened and closed by the other of the pair of handle pieces.

According to this configuration, since the fulcrum of the lever can be made to exist in each rotating piece of the head portion, the portion acting on the work object (work) corresponding to the working point of the lever in each rotating piece. You can increase your power. Therefore, for example, "strongly grasp", "strongly hold", and "when the work object is an electric wire or an iron wire, the work object (work)", which was difficult to work with a conventional work tool, is a work object with a light force. You can easily "cut things" and "turn while holding strongly".

A connection hole is provided at the tip of the handle portion and the base portion of the head portion, respectively, and the connection hole on the handle portion side and the connection hole on the head portion side are communicated with each other to penetrate the pin. By doing so, the head portion can be attached to the handle portion.

According to this configuration, the head portion can be easily attached to and detached from the handle portion by attaching and detaching the pin to each connection hole.

The head portion is provided with a recess at the tip thereof.
The recess may be provided with a non-slip groove extending in the front-rear direction, and may be able to be turned in a direction in which the screw is at least loosened while sandwiching the head of the screw which is the work object.

According to this configuration, the screw in the fixed state can be removed by using the concave portion of the head portion.

According to the present invention, since the head portion can be attached and detached, the handle portion can be shared, so that it is possible to provide a work tool that can reduce the manufacturing cost.

It is a work tool which concerns on one Embodiment of this invention, and is the perspective view which shows the state which attached the pliers head. (A) is a side view of the work tool, and (b) is a front view of the work tool. FIG. 2 is a cross-sectional view taken along the line AA in FIG. 2A. FIG. 2B is a cross-sectional view of a main part of BB arrow viewing in FIG. 2 (b). It is a perspective view which showed the state in which the handle of the work tool was opened with the magnified view of the tip portion of the pliers head. It is a perspective view which shows the example of the embodiment of the head part, (a) shows a pliers head, (b) shows a radio pliers head, (c) shows a nipper head.

Next, the present invention will be described by taking up one embodiment. The direction expressed in the following description is based on the direction shown in FIG. 1, with the left side in the drawing as the front and the right side in the drawing as the rear. Further, the side appearing in FIG. 1 is the front side, and the opposite side is the back side.

The work tool 1 of the present embodiment has a handle portion 2 that is opened and closed by a user's gripping operation (operation such as pinching), and a work object (work) that is opened and closed by opening and closing the handle portion 2 and closed. It is provided with a head portion 3 that acts on the surface and can be pinched, crushed, or cut, for example. The head portion 3 of the present embodiment is a pliers head 3a having the same shape as the tip portion of the pliers.

The handle portion 2 includes a pair of handle pieces (first handle piece 21a, second handle piece 21b) that are rotatably connected. The first handle piece 21a is located below in FIG. 1, and the second handle piece 21b is located above in FIG. A connection hole 22 for connecting the head portion 3 is provided at the tip end portion of the handle portion 2 (each handle piece 21a, 21b) (see FIG. 3). The pair of handle pieces 21a and 21b are pivotally supported by the handle pin 23, and each is urged by the kick spring 24 in the direction of always opening the handle portion 2.

The handle portion 2 has a combination of the engaging portion 251 and the engaged portion 252 that prevents the handle portion 2 from opening by engaging with the engaging portion 251 in a closed state of the handle portion 2. It is provided with a ratchet mechanism 25 capable of holding the above. Since the ratchet mechanism 25 is provided, the closed state of the handle portion 2 can be maintained, so that the user can easily perform the work.

A ratchet ridge 252 composed of a plurality of ridges is formed on the first handle piece 21a as an engaged portion in an arc shape centered on the axis of the handle pin 23. A release lever pin 261 which is a part of the release mechanism 26 described later is rotatably attached to the second handle piece 21b so that the ratchet claw 251 as an engaging portion rotates in conjunction with the rotation of the release lever pin 261. It is installed. A spring pin 253 is attached to the second handle piece 21b, and a pull spring 254 is attached so as to connect the spring pin 253 and the ratchet claw 251. Therefore, when the ratchet claw 251 engages with the ratchet ridge 252, the ratchet works in the direction of closing the handle portion 2 (that is, the handle portion 2 does not open while trying to close the handle portion 2). When the handle portion 2 is completely closed to the fully closed state (the ratchet claw 251 crosses the last mountain in the ratchet mountain 252 and the ratchet claw 251 and the ratchet mountain 252 are no longer engaged), the ratchet claw 251 is driven by the force of the pull spring 254. Rotates, the ratchet mechanism 25 is released, and the handle portion 2 is fully opened by the force of the kick spring 24.

That is, the ratchet mechanism 25 closes the handle portion 2 by continuing the engagement between the engaging portion (ratchet claw) 251 and the engaged portion (ratchet mountain) 252 until the handle portion 2 is fully closed. The state can be maintained. According to this configuration, since the ratchet mechanism 25 operates from the start of closing the handle portion 2 to the fully closed state, it is possible to work by fixing the opening degree of the handle portion 2 in a desired closed state.

A disengagement mechanism 26 is provided to disengage the engaging portion 251 of the ratchet mechanism 25 from the engaged portion 252. As shown in FIG. 4, a release lever 262 is pivotally supported by a spring pin 263 on the head of the release lever pin 261. The release lever 262 is urged in the direction of being pushed up by the release lever spring 264. The release lever 262 is rotated clockwise with respect to the second handle piece 21b against the urging force of the release lever spring 264, and a part of the release lever 262 is attached to the inner edge end of the second handle piece 21b (Fig.). When the bent portion at the right end shown in 4 is hooked, the ratchet mechanism 25 is released and the state is maintained. Even when the ratchet mechanism 25 is released and held, the head portion 3 closes when the handle portion 2 is gripped, so that work can be performed according to the function of the head portion 3.

In this way, the ratchet mechanism 25 can open the handle portion 2 while the handle portion 2 is being closed or from the start of the closing operation of the handle portion 2 due to the operation of the release mechanism 26. According to this configuration, the ratchet mechanism 25 can be released by operating the release mechanism 26 at any time, so that the ratchet mechanism 25 is not required when a large force is not required or when continuous work is desired. Easy to use.

The head portion 3 is removable from the handle portion 2. Therefore, the shape of the handle portion 2 can be made common to the head portion 3 having a plurality of forms (see, for example, FIGS. 6A to 6C). The head portion 3 has, in addition to the plier-shaped pliers head 3a shown in FIG. 6 (a), for example, the radio pliers-shaped radio pliers head 3b shown in FIG. 6 (b) and the nipper-shaped head portion 3 shown in FIG. 6 (c). It can be a nipper head 3c. 6 (a) to 6 (c) show an example of the form of the head portion 3. The pliers head 3a has the functions of a cutting blade, a screw removing groove (recessed portion 3a1, non-slip groove 3a2), and a grip portion. The needle-nose pliers head 3b has the functions of a cutting blade and a grip portion. The nipper head 3c has a function of a cutting blade. The form of the head portion 3 is not limited to these, and various modifications can be made. In addition to the examples shown in FIGS. 6A to 6C, examples thereof include pliers, bolt clippers, and scissors (gold scissors, etc.).

By configuring the head portion 3 in this way, for example, if a mold corresponding only to the head portion 3 is manufactured, the mold can be miniaturized and the mold cost can be reduced. Further, since only the head portion 3 can be manufactured, the processing jig can be miniaturized and the jig cost can be reduced. These are the merits that manufacturers can enjoy. Further, since the head portion 3 can be replaced according to the application, if the head portion 3 is repaired or a different type (different form or function) of the head portion 3 is purchased, a large number of types can be prepared at low cost. These are the merits that users can enjoy.

The pliers head 3a shown in FIG. 6A is provided with a recess 3a1 at the tip thereof. The recess 3a1 is provided with a non-slip groove 3a2 extending in the front-rear direction, and the head of the screw, which is a work object, is engaged with the non-slip groove 3a2 and sandwiched in a state where the screw is at least loosened. Can be turned. According to this configuration, the recess 3a1 of the head portion 3 can be used to easily remove the screw which is in a fixed state due to rust or the like.

The head portion 3 includes a pair of rotating pieces 31, 31 and a connecting piece 32 that rotatably connects the pair of rotating pieces 31, 31. Each of the pair of rotating pieces 31, 31 has a symmetrical shape. The connecting piece 32 rotatably supports each of the pair of rotating pieces 31, 31 on the front side and the back side. Further, the connecting piece 32 supports each of the pair of rotating pieces 31, 31 at different positions. The rotating piece 31 and the connecting piece 32 are connected by a pin 33 (specifically, a caulking pin). A rotary pin (not shown) is interposed between the pair of rotating pieces 31, 31 so that the head portion 3 can be smoothly opened and closed. One of the pair of rotating pieces 31 and 31 is opened and closed by one of the pair of handle pieces 21a and 21b. The other of the pair of rotating pieces 31 and 31 is opened and closed by the other of the pair of handle pieces 21a and 21b. In the head portion 3 configured in this way, since the fulcrum of the lever can be made to exist in each rotating piece 31, the work target in each rotating piece 31 corresponds to the action point corresponding to the input from the base which is the force point. The force of the part that acts on an object can be increased.

A connection hole 34 is provided at the base of the head portion 3 (see FIG. 3). This has the same diameter as the connection hole 22 provided in the handle portion 2. Further, the distance between the two connection holes 34, 34 provided is the same as the distance between the connection holes 22, 22 provided in the handle portion 2. The head portion 3 is attached to the handle portion 2 by communicating the connection hole 22 on the handle portion 2 side and the connection hole 34 on the head portion 3 side and penetrating the pin 27 (specifically, die spin). The "die spin" means that a retaining ring for preventing a retaining ring can be attached to and detached from a groove provided on the outer periphery of the end of the shaft (the end far from the head), and the retaining ring is attached. With a pin configured so that the die spin cannot be pulled out from the penetrated object (handle portion 2 and head portion 3 in this embodiment), and the die spin can be pulled out from the penetrated object when the retaining ring is removed from the shaft portion. be. The configuration of the pin 27 is not limited to the die spin, and various configurations can be used as long as the state in which the pin 27 can be pulled out and the state in which the pin 27 cannot be pulled out can be switched. With such a configuration, by attaching / detaching the pin 27 to each of the connection holes 22 and 34, the head portion 3 can be easily attached / detached to / from the handle portion 2 and replaced.

Here, conventional work tools such as pliers, needle-nose pliers, and nippers, which are operated by the user's grip operation, have only one fulcrum of the lever, so the handle load (force of force) that grips the handle is used. On the other hand, the force (point of action) of the head part generated was about 5 to 10 times at most. In the present embodiment, the correspondence of each part of the lever in the handle portion 2 is that the axis of the connection portion between the handle pieces 21a and 21b is the fulcrum, the portion of the handle portion 2 that the user grips is the power point, and the handle pieces 21a and 21b. The axis of the connection hole 22 is the point of action. Then, since the force acting on the action point coincides with the axis of the connection hole of the head portion 3, it becomes the force point in the head portion 3. Correspondence of each part of the lever in the head portion 3 is that the axis of the connection hole of each rotating piece 31 is the power point, the axis of the pin 33 connecting the rotating piece 31 and the connecting piece 32 is the fulcrum, and the tip of the head portion 3 The functional part is the point of action. From the above configuration, the input from the handle portion 2 is amplified by the two levers in the handle portion 2 and the head portion 3 and acts on the point of action (the functional portion at the tip of the head portion 3).

In this way, by combining the two levers of the lever on the handle portion 2 side (handle pieces 21a and 21b) and the lever on the head portion 3 side (rotating piece 31), the handle load (load for gripping the handle portion 2 by hand) is used. ), The head portion 3 can be increased by 30 to 40 times, which is much larger than the conventional one. By utilizing this lever principle, the functions of grasping, cutting, and turning, which were difficult to work with the load of the handle portion in the conventional work tool, can be increased in the present embodiment. As a result, tasks such as gripping strongly, cutting thick lines, and turning while holding are easier.

Further, since the work tool 1 of the present embodiment is provided with the ratchet mechanism 25 as described above, the force for gripping the handle portion 2 can be gradually applied and does not revert, so that even if the gripping force is loosened. The head portion 3 is held without being opened unexpectedly. In this way, by using the work tool 1 in which the ratchet mechanism 25 and the two lever fulcrums are combined, the workability can be improved.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.

For example, in the above embodiment, the head portion 3 is directly attached to and detached from the handle portion 2. However, another portion may be interposed between the head portion 3 and the handle portion 2.

Further, in the above embodiment, the release mechanism 26 with respect to the ratchet mechanism 25 is provided. However, the release mechanism 26 may not be provided.

Further, in the above embodiment, a pin 27 that can be removed from the connection holes 22 and 34 such as a die spin is provided between the connection hole 22 provided in the handle portion 2 and the connection hole 34 provided in the head portion 3. rice field. However, the pin 27 is not limited to that of the above embodiment, and various pins can be used. For example, it may be a caulking pin such as a pin 33. In the case of such a pin, unlike the die spin, the pin 27 cannot be easily removed by the user because the pin 27 is fixed after being inserted into the penetrating object. The pin 27 can be removed by cutting or scraping off the head or shaft of the 27. In the present invention, the fact that the head portion 3 can be attached to and detached from the handle portion 2 includes a configuration using such a pin 27.

1 Work tool 2 Handle 3 Head 3a Pliers head 3a1 Recess 3a2 Non-slip groove 3b Radio pliers head 3c Nipper head 21a 1st handle piece 21b 2nd handle piece 22 Connection hole (handle part)
23 Handle pin 24 Kick spring 25 Ratchet mechanism 251 Engagement part, ratchet claw 252 Engagement part, ratchet mountain 253 Spring pin 254 Pull spring 26 Release mechanism 261 Release lever pin 262 Release lever 263 Spring pin 264 Release lever Spring 27 Pin 31 Rotating piece 32 Connection piece 33 Pin 34 Connection hole (head part)

Claims (6)

It is provided with a handle portion that opens and closes when the user grips it, and a head portion that opens and closes when the handle portion opens and closes and acts on a work object when the handle portion is closed.
The handle portion can hold the closed state of the handle portion by having a combination of the engaging portion and the engaged portion that prevents the handle portion from opening by engaging with the engaging portion. Equipped with a ratchet mechanism,
A work tool whose head portion is removable from the handle portion. According to claim 1, the ratchet mechanism can maintain the closed state of the handle portion by continuing the engagement between the engaged portion and the engaged portion until the handle portion is fully closed. The work tool described. A disengagement mechanism for disengaging the engaged portion from the engaged portion is provided.
The ratchet mechanism can open the handle portion by operating the release mechanism while the handle portion is being closed or from the start of the closing operation of the handle portion. The work tool according to 2. The handle portion includes a pair of rotatably connected handle pieces.
The head portion includes a pair of rotating pieces and a connecting piece that rotatably connects the pair of rotating pieces.
The connecting piece connects each of the pair of rotating pieces at different positions.
One of the pair of rotating pieces is opened and closed by one of the pair of handle pieces.
The work tool according to any one of claims 1 to 3, wherein the other of the pair of rotating pieces is opened and closed by the other of the pair of handle pieces. Connection holes are provided at the tip of the handle and the base of the head, respectively.
The head portion is attached to the handle portion by communicating the connection hole on the handle portion side and the connection hole on the head portion side and penetrating the pin, according to any one of claims 1 to 4. Described work tool. The head portion has a recess at the tip and has a recess.
Claims 1 to 5 include the recess having a non-slip groove extending in the front-rear direction, and the screw can be turned at least in a loosening direction while sandwiching the head of the screw which is the work object. The work tool described in any of.

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