TWI659810B - Water pump pliers and cover member - Google Patents

Abstract

[Problem] To provide a water pump plier that can be used for a wide range of applications. [Solution] A water pump plier including: a connecting portion 103 that rotatably connects the first arm 101 and the second arm 102; and a locking structure 104 for locking the connecting portion 103 to two holes of the hole. The above different positions are used to adjust the width of the opening between the jaws. Among them, the jaws 1011 and 1021 provided at the first ends of the first and second arms 101 and 102 are respectively provided at the front ends of the jaws 1011 and 1021. The first facing surface 20 and the second facing surface 30 are locked at the position where the opening width of the jaws 1011 and 1021 is the narrowest by the locking structure 104, and the rotation center 1031 of the connecting portion 103 is locked. They are located on planes at equal distances from the first facing surface 20 and the second facing surface 30.

Description

Water pump pliers and cover member

The invention relates to a water pump clamp and the like.

As a tool for connecting pipes such as water pipes and gas pipes, a clamp called a water pump plier is conventionally known. The water pump pliers are, for example, pliers that bend the direction of the opening portion to the direction in which the handle portion extends. Water pump pliers are used, for example, to clamp a lock nut or a pipe joint between a first jaw and a second jaw, and to lock and fix such accessories. The connection portion of the water pump pliers usually has a structure that can be largely slid, and if the connection portion is slid, the first jaw portion and the second jaw portion are largely opened, and large items can be more reliably clamped.

FIG. 11 is a right side view of a state where the first jaw portion 91 and the second jaw portion 92 are closed (FIG. 11 (a)), and the first jaw portion 91 and the second jaw portion 92 are opened, as an example of a conventional water pump pliers. Right side view of the state (see FIG. 11 (b)) (see Non-Patent Document 1). In this water pump pliers, the arm having the first jaw portion 91 and the arm having the second jaw portion 92 are rotated with the connecting shaft 93 as a rotation axis, and the first jaw portion 91 and the second jaw portion 92 can be switched on and off. Hold the object such as a lock nut.

[Xizhi technical literature] [Non-patent literature]

[Non-Patent Document 1] "KNIPEX-The Pliers Company.-Product Information", [online], KNIPEX-Werk, [Retrieved on January 17, 2007 (2017)], INTERNET <URL: http: // www .knipex.com / index.php? id = 1216 & L = 17 & page = group_detail & parentID = 1368 & groupID = 1503>

Conventionally, as one of the uses of a clamp, the use method which clamps an object, such as a screw head, at the front-end | tip of a clamp, and pulls or rotates an object is known. For example, the inventor of the present application has proposed a clamp having a structure for rotating a screw by clamping a screw head at a tip of a jaw (Japanese Patent Application Laid-Open No. 2003-291072).

With regard to the conventional water pump pliers shown in FIG. 11, as one of its uses, the following usage is also considered: the front end of the first jaw portion 91 and the front end of the second jaw portion 92 are sandwiched and installed so as to extend there The object such as the head of the screw in the direction of the front end of the jaw is drawn, and the object is pulled or rotated.

However, in the conventional water pump pliers shown in FIG. 11, when the arm is rotated by using the connecting shaft 93 as the rotation shaft, each of them includes the front ends of the first jaw 91 and the front ends of the second jaw 92. The position where the two faces of the lateral facing surface intersect greatly moves. Therefore, it is difficult to predict the first jaw when an object such as a screw head is sandwiched between the tip of the first jaw 91 and the tip of the second jaw. The movement of 91 and the movement of the second jaw 92, and when the first jaw 91 and the second jaw 92 are closed, since the front end of the second jaw 92 temporarily moves forward, the first jaw When the front end of 91 and the front end of the second jaw sandwich an object such as a screw head, the amount of movement of the front end of the first jaw 91 and the front end of the second jaw with respect to the respective front end directions is different, which is not easy. Problems pinching objects.

As described above, in the conventional water pump pliers, when the object is sandwiched between the tip of the first jaw portion 91 and the tip of the second jaw portion, there is a problem of poor operability. Therefore, the water pump pliers cannot be properly used for a specific purpose and have limited applications.

The present invention has been made to solve the problems described above, and an object of the present invention is to provide a water pump plier that can expand the application that can be appropriately used.

The water pump pliers of the present invention are water pump pliers having a structure including a first arm and a second arm, the first arm and the second arm having a jaw at a first end portion and a handle at a side of the second end portion. A connecting portion, which is inserted into a hole provided on the first arm and can be locked at two or more different positions, and rotatably connects the first arm and the second arm; and a locking structure, It is used for locking the connecting portion at two or more different positions of the hole to adjust the opening width between the jaws. Among them, a first facing surface is provided at the front end of the jaw of the first arm and the front end of the jaw of the second arm. And the second facing surface, the connecting portion is locked in a position where the opening width of the jaw is the narrowest by the locking structure, and the rotation center of the connecting portion is located at an equal distance from the first facing surface and the second facing surface. On the surface.

With this structure, an object such as a screw head can be held between the tip of the first facing surface and the tip of the second facing surface, and the object can be removed. In addition, even if the rotation center of the connecting portion is located on the extension of the axis of the object such as a screw to be clamped without looking at the front end of the jaw, etc., the positioning when grasping the object can be intuitively performed with reference to the position of the connecting portion Etc. can improve operability. In addition, the first facing surface and the second facing surface can be formed at an angle formed by the respective normals and the moving direction of the respective surfaces. It moves in a certain way, so it is easy to predict the movement of the first facing surface and the second facing surface when the screw head is clamped by the first facing surface and the second facing surface. Since the movement is not complicated, the clamping can be easily performed. The positioning of the screws can easily pinch the screws. In addition, when the first handle portion and the second handle portion are held, for example, the front end of the second facing surface of the lower jaw is tied in a direction slightly parallel to the first facing surface, and does not move to the first facing surface. The front end of the surface 20 is further forward, or does not move substantially to the front, and the head of the screw can be easily clamped. This makes it possible to expand the use of water pump pliers that can be used appropriately.

In addition, the water pump pliers of the present invention are water pump pliers having a structure in which the first facing surface and the second facing surface have recesses, and the recesses are provided with ridges extending from the front end of the jaw.

With such a structure, an object such as a head of a screw can be reliably held between the tip of the first facing surface and the tip of the second facing surface, and the object can be removed.

In addition, the water pump pliers of the present invention are water pump pliers having a structure in which the water pump pliers are respectively provided at the front ends of the ridges of the jaws of the first arm and the jaws of the second arm, and The state is that each of the ridges is inclined to gradually move away from each other as the front end of the jaw is separated.

With this structure, when holding an object such as the head of a screw, the front ends of the two recesses can be made parallel or nearly parallel, and the object can be reliably held.

In addition, the water pump pliers of the present invention are the water pump pliers described above, and include a wrench-shaped portion on the second end portion side of at least one of the first arm and the second arm, and the wrench-shaped portion has the following shape: Or the cross section perpendicular to the direction in which the second arm extends is a regular n-angle (n is an integer of 3 or more), and the thickness is a shape that continuously decreases toward the front end of the second end portion.

With this structure, the wrench-shaped portion can be used as an n-angle wrench with different sizes, and the convenience of work can be improved.

In addition, the water pump pliers of the present invention are the water pump pliers described above, and have a screwdriver-shaped portion on the second end portion side of at least one of the first arm or the second arm. shape.

With this structure, a screwdriver-shaped portion can be used as a flat-shaped screwdriver, and workability can be improved.

In addition, the water pump pliers of the present invention are provided in the water pump pliers and further include a cover member detachably attached to a handle portion of at least one of the first arm and the second arm; wherein the cover member has The opening portion extends in the longitudinal direction, and the opening portion reaches at least one end portion, and the cross section perpendicular to the longitudinal direction of the opening portion is C-shaped. The first arm and the first arm are inserted into the handle portion of the arm of the cover member. An inserting portion is provided on the opposite side of the two arms opposite to each other, and the inserting portion has a shape that can be inserted into the inside of the cover member through the opening portion, and is mounted on the arm by sliding the cover member, so that the cover member can be installed. The insertion portion of the arm is inserted into the C-shaped interior of the cover member from the open end of the cover member.

With this structure, the cover member can be attached to the handle portion by sliding it, and the cover member can be easily attached to and detached from the handle portion. In addition, since the cross section is C-shaped, the cover member can be prevented from rotating around the handle portion.

The water pump pliers of the present invention are the water pump pliers, and the cover member is attached to the arm by sliding from the first end portion side to the second end portion side of the arm.

With this structure, the cover member is slid, the pump pliers can be easily attached and detached, and the cover member is inserted from a direction different from the direction of the rotating arm, so that the cover is difficult to fall off during operation.

In addition, the water pump pliers of the present invention are the water pump pliers described above, each cover member is attached to the arm, has a locking surface at a portion on the second end side, and the first A cover locking portion is further provided at the two end portions, and the cover locking portion is locked with the locking surface of the cover member to prevent the cover member from moving toward the second end portion side.

With this structure, the cover member is not moved to the second end portion side of the first arm or the second arm, and operability or safety can be improved. In addition, by attaching the cover member, the grip of the water pump pliers can be easily improved.

In addition, the water pump pliers of the present invention are attached to the water pump pliers described above, and the handle portion to which the cover member is attached is in a state where the cover member is removed, and has a non-slip shape at the exposed portion.

With this structure, even when the cover member is removed, the water pump pliers can be prevented from sliding, and operability or safety can be improved.

With the water pump pliers of the present invention, applications that can be appropriately used can be expanded.

1‧‧‧Water Pump Pliers

101‧‧‧ first arm

101a‧‧‧first end

101b‧‧‧Second end

1011‧‧‧Jaw

1012‧‧‧Handle

1013‧‧‧Sliding hole

1014‧‧‧First embedding section

1015‧‧‧First cover locking section

1016‧‧‧ first connecting shaft side cover locking portion

102‧‧‧ second arm

102a‧‧‧first end

102b‧‧‧Second end

1021‧‧‧ Jaw

1022‧‧‧Handle

1024‧‧‧Second Embedding Department

1025‧‧‧Second cover locking section

1026‧‧‧Second connecting shaft side cover locking portion

103‧‧‧Connecting shaft

1031‧‧‧ center of rotation

1032‧‧‧Connecting shaft

1033‧‧‧ Nut

104‧‧‧ Calming structure

1041‧‧‧ sliding recess

105‧‧‧ wrench shape part

106‧‧‧Screw shape part

107‧‧‧ cover member

1071‧‧‧Cading noodles

1072‧‧‧ opening

Fig. 1 is a front view (Fig. 1 (a)), a right side view (Fig. 1 (b)) of the water pump pliers according to the embodiment of the present invention, and a view of the second handle portion viewed from the side where the first arm and the second arm face each other ( Fig. 1 (c)), and a view seen from the second end portion side (Fig. 1 (d)).

FIG. 2 is a perspective view of the first jaw portion and the periphery of the second jaw portion in a state where the first jaw portion and the second jaw portion of the water pump pliers are enlarged (FIG. 2 (a)), and a first facing surface showing the first jaw portion. A plan view of the surface of the surface (Fig. 2 (b)).

Fig. 3 is a sectional view of the periphery of the front ends of the first and second jaws of the water pump pliers (Fig. 3 (a)), showing the first jaw and the second jaw in a state where the head of the screw is clamped by the front end; Side view of the front end periphery (Fig. 3 (b)), cross-sectional views of the front end periphery of the first and second jaws showing the state where the head of the screw is clamped by the front end (Fig. 3 (c)), A cross-sectional view of the vicinity of the distal ends of the first and second jaws in a state where the ends of the screws are clamped by the ends (FIG. 3 (d)).

Fig. 4 is a front view (Fig. 4 (a)), a side view (Fig. 4 (b)) of the state where the cover member of the water pump pliers is removed, and the first handle portion is viewed from the side where the first arm and the second arm face each other; (FIG. 4 (c)) and the second end portion (FIG. 4 (d)).

Fig. 5 is a perspective view (Fig. 5 (a)) viewed from the side of the second end portion side of the cover member disposed in the water pump pliers, and a perspective view (Fig. 5 (b)) viewed from the side disposed at the first end side ), A top view (FIG. 5 (c)), a bottom view (FIG. 5 (d)), a side view (FIG. 5 (e)), and a cross-sectional view (FIG. 5 (f)).

FIG. 6 is a perspective view (FIG. 6 (a) -FIG. 6 (c)) and a side view (FIG. 6 (d) -FIG. 6 (f)) which show the attachment method of the cover member of the water pump pliers.

FIG. 7 is a front view (FIG. 7 (a)) and a rear view (FIG. 7 (b)) showing an example of a water pump plier having a non-slip first handle portion and a second handle portion having the water pump pliers. Illustration.

Fig. 8 is a view showing a perspective view (Fig. 8 (a)), a cross-sectional view (Fig. 8 (b)), and a cross-sectional view (Fig. 8 (c)) of the wrench-shaped portion of the water pump pliers.

FIG. 9 is a side view (FIG. 9 (a)), a cross-sectional view (FIG. 9 (b)), a cross-sectional view (FIG. 9 (c)), and a view showing a state where a wrench-shaped portion is inserted into the first pipe of the water pump pliers A side view (FIG. 9 (d)), a cross-sectional view (FIG. 9 (e)), and a cross-sectional view (FIG. 9 (f)) of the state where the wrench-shaped part was inserted into the second pipe.

FIG. 10 is a sectional view showing a first modification example of the cover member of the water pump pliers (FIG. 10 (a)) and a perspective view showing a second modification example of the cover member (FIG. 10 (b)).

Fig. 11 is a side view of a conventional water pump pliers with a closed jaw (Fig. 11 (a)) and a side view of a opened jaw (Fig. 11 (b)).

Hereinafter, embodiments of water pump pliers and the like will be described with reference to the drawings. In addition, in the embodiment, the constituent elements having the same reference numerals perform the same operations, and therefore the description thereof may be omitted.

(Implementation form)

The present invention relates to a water pump pliers. The water pump pliers are based on the intensive research of the inventor of the present application. structure.

Fig. 1 is a front view (Fig. 1 (a)), a right side view (Fig. 1 (b)) of a state in which the jaw of the water pump pliers of this embodiment is closed, and the water pump pliers are viewed from the side where the first and second arms face each other. Figure (2 (c)) of the second handle portion and Figure 2 (d) of the water pump pliers viewed from the second end portion side.

FIG. 2 is a perspective view of the first jaw portion and the second jaw portion in a state where the jaw portion of the water pump pliers of the present embodiment is enlarged (FIG. 2 (a)), and the surface of the first facing surface of the first jaw portion is shown. Top view (Figure 2 (b)).

FIG. 3 is a cross-sectional view of the first jaw portion and the second jaw portion in a state in which the first jaw portion and the second jaw portion of the water pump pliers of the present embodiment are closed along the first jaw portion (FIG. 3 (a)), a side view showing the periphery of the front end of the first jaw and the second jaw with the head held by the screw (Fig. 3 (b)), and the state where the head is held by the head A cross-sectional view of the periphery of the front ends of the first and second jaws along the extension direction of the first jaw (FIG. 3 (c)), the first jaw, and A cross-sectional view taken along the line IIId-IIId near the front end of the second jaw (Fig. 3 (d)).

Fig. 4 is a front view (Fig. 4 (a)) and a side view (Fig. 4 (b)) of the water pump pliers in a state in which the cover member of this embodiment is removed; A view of the two handle portions (FIG. 4 (d)) and a view of the second end portion (FIG. 4 (c)).

Fig. 5 is a perspective view of the side of the opening member extending in the longitudinal direction provided with the cover member of the embodiment as viewed from the side disposed on the second end portion side (Fig. 5 (a)), and viewed from the side disposed on the first end portion side; A perspective view (Fig. 5 (b)), a top view (Fig. 5 (c)), a bottom view (Fig. 5 (d)), a side view (Fig. 5 (e)), and 5 (e) is a sectional view taken along the line Vf-Vf (Fig. 5 (f)). In FIG. 5 (c), which is a plan view, the right side is the locking surface side.

The water pump pliers 1 includes a first arm 101, a second arm 102, a connecting shaft 103, and a locking structure 104.

The first arm 101 has a first end portion 101a and a second end portion 101b, a jaw portion 1011 at the first end portion 101a, and a handle portion 1012 at the second end portion 101b side. Here, the jaw portion 1011 and the handle portion 1012 of the first arm 101 are referred to as the first jaw portion 1011 and the first handle portion 1012. The first arm 101 includes a wrench-shaped portion 105 between the handle portion 1012 and the second end portion 101b.

The second arm 102 has a first end portion 102a and a second end portion 102b, a jaw portion 1021 at the first end portion 102a, and a handle portion 1022 at the second end portion 102b side. Here, the jaw portion 1021 and the handle portion 1022 of the second arm 102 are referred to as the second jaw portion 1021 and the second handle portion 1022. The second arm 102 has a driver-shaped portion at the second end portion 102b.

The first arm 101 is provided with a sliding hole (hereinafter referred to as a sliding hole) 1013 extending in a direction in which the first arm 101 extends. The slide hole 1013 is a through hole. Here, a case where the slide hole 1013 has a flat shape extending linearly is shown as an example. However, it does not necessarily need to extend linearly. Moreover, the so-called sliding hole 1013 extends along the direction in which the first arm 101 extends, regardless of whether the direction in which the sliding hole 1013 extends is parallel to the direction in which the first arm 101 extends. For example, when the sliding hole 1013 is extended as a whole, if the extending direction of the first arm 101 is extended, the extending direction of the sliding hole 1013 is inclined with respect to the extending direction of the first arm 101, or the sliding hole 1013 is curved. It can be seen that the sliding hole 1013 extends in a direction in which the first arm 101 extends. In addition, the slide hole 1013 may not necessarily extend along the first arm 101.

The connecting shaft 103 is inserted through the sliding hole 1013 and rotatably connects the first arm 101 and the second arm 102. A screw head 1032 is provided at one end of the connecting shaft 103 (here, as an example, an end portion on the side of the first arm 101). In addition, the other end of the connecting shaft 103 (here, as an example, an end portion on the side of the second arm 102) is provided with a screw groove, and is fixed with a nut 1033. However, the method of fixing the connecting shaft 103 is not limited. The connecting shaft 103 connects a portion between the first jaw portion 1011 and the first handle portion 1012 of the first arm 101 and a portion between the second jaw portion 1021 and the second handle portion 1022 of the second arm 102. The connecting shaft 103 may be fixed to the second arm 102 at one end, for example. The connecting shaft 103 may be integrally formed with the second arm 102, for example. The first arm 101 and the second arm 102 are rotatable with the rotation center 1031 of the connection shaft 103 as a rotation axis. By changing the position of the coupling shaft 103 by sliding the coupling shaft 103 within the slide hole 1013, the distance between the jaw portion 1011 of the first arm and the jaw portion 1021 of the second arm described later can be adjusted. Here, a case where a cross section perpendicular to the direction in which the shaft extends in a portion of the connecting shaft 103 in the slide hole 1013 is D-shaped will be described as an example.

The first arm 101, the second arm 102, and the connecting shaft 103 are made of metal such as iron. However, the materials of the first arm 101, the second arm 102, and the connecting shaft 103 are not limited. For example, one or more of these members may be made of resin such as reinforced plastic.

The locking structure 104 is a structure for locking the connecting shaft 103 at two or more different positions of the slide hole 1013 to adjust the opening width between the first jaw portion 1011 and the jaw portion 1021 of the second arm. The two or more different positions are, for example, different positions in the longitudinal direction of the slide hole 1013. In this embodiment, the following example is shown: the sliding recesses 1041 provided in the four arc-shaped recesses on the long side of the sliding hole 1013 and the part extending inside the sliding hole 1013 extend with the axis The cross section perpendicular to the direction is a D-shaped connecting shaft 103 to constitute a locking structure 104. By rotating the first arm 101 and the second arm 102, the relationship between the direction of the parallel shaft portion and the direction in which the slide hole extends is appropriately changed, so that the curved surface portion of the parallel shaft portion does not engage with the slide recess 1041 of the slide hole 1013. The position of the connecting shaft 103 can be fixed by moving the connecting shaft 103 within the sliding hole 1013 or engaging a curved surface portion of the parallel shaft portion with one of the sliding recesses 1041 included in the sliding hole 1013.

Here, although the case where there are four sliding recesses 1041 included in the sliding hole 1013 is taken as an example, the number of the sliding recesses 1041 included in the sliding hole 1013 may be two or more (preferably three or more). The sliding recess 1041 may be provided on both sides of the long side of the sliding hole 1013. The cross-sectional shape of the connecting shaft 103 may be an elliptical shape or the like. As the locking structure, a locking structure other than the above may be used for adjusting the position of a coupling shaft used in general water pump pliers and the like.

A first facing surface 20 and a second facing surface 30 are provided on the front end of the first jaw portion 1011 of the first arm 101 and the front end of the second jaw portion 1021 of the second arm 102 as mutually facing surfaces. The first facing surface 20 is provided on the first arm 101, and the second facing surface 30 is provided on the second arm 102. The front end of the first jaw portion 1011 is a first end portion 101 a of the first arm 101. The front end of the second jaw portion 1021 is a first end portion 102 a of the second arm 102. The front end here can be regarded as the front end part of the first jaw part 1011 and the second jaw part 1021, can be regarded as the front end side, or can be regarded as the vicinity of the front end. A recessed grip surface 23 is provided at a position adjacent to the first facing surface 20 of the first jaw portion 1011. At a position adjacent to the second facing surface 30 of the second jaw portion 1021, a clamping surface 33 is provided which is more recessed inward than the second facing surface 30.

With respect to the water pump pliers 1, by bringing the first handle portion 1012 and the second handle portion 1022 close to each other, a pipe such as a water pipe (not shown) extending in the axial direction of the connecting shaft 103 can be held by the holding surface 23 and the holding surface 33 (not shown).示). In addition, by moving the connecting shaft 103 in the slide hole 1013, a locking structure is used to make it different in different positions. The position is locked, the distance between the opening of the first jaw 1011 and the second jaw 1021 can be changed, and tubes of various diameters can be clamped.

The first facing surface 20 has a recessed portion 21 extending in a direction extending from the front end of the first jaw portion 1011 to the first arm 101. The recessed portion 21 is provided in the center of the first facing surface 20 in a direction perpendicular to the direction in which the first arm 101 extends (hereinafter referred to as the width direction). The recessed portion 21 is connected to an end surface 24 of the front end of the first jaw portion 1011. The end surface 24 at the front end of the first jaw portion 1011 refers to an end surface located in a direction in which the first arm 101 extends. This also applies to the end face 34 at the front end of the second jaw portion 1021. The planar shape of the first facing surface 20 side of the end surface 24 of the distal end of the jaw portion 1011 has a recessed portion at the portion where the recessed portion 21 is provided.

The recessed portion 21 is provided with a plurality of ridges 22 extending in a direction extending from the front end of the first jaw portion 1011 to the first arm 101. The ridges are, for example, ridges or protrusions extending linearly. Here, although the case where three convex stripes are provided is shown as an example, the number of convex stripes 22 is not limited. However, it is preferable that the number of the ridges 22 is two or more. The cross-sectional shape, height, and the like of the ridges 22 are not limited. It should be noted that the provision of the convex strips 22 can also be considered to include a case where a concave portion of one or more lines extending in a direction in which the first arm 101 extends is provided, or a case where unevenness is provided in the width direction of the first arm 101. Although the front end of the convex strip 22 is preferably sharp, it may not be sharp. For example, the front end may be rounded, and the front end may be flat and flat. Further, in FIG. 4, the bottom portion 22 a of the groove extending along a line adjacent to the ridge 22 is shown by a dotted line.

The second facing surface 30 has a recessed portion 31 similar to the recessed portion 21 described above. The recessed portion 31 extends in a direction extending from the front end of the second jaw portion 1021 to the second arm 102, and is provided at the center of the second arm 102 in the width direction of the second facing surface 30. The recessed portion 31 is connected to an end surface 34 of the front end of the second jaw portion 1021. The planar shape of the second facing surface 30 side of the end surface 34 of the front end of the second jaw portion 1021 has a recessed portion at a portion where the recessed portion 31 is provided. The concave portion 31 is provided with a plurality of ridges 32, and the ridges 32 extend in a direction extending from the front end of the second jaw portion 1021 to the second arm 102 in the same manner as the ridges 22 described above. The shape, number, and the like of the ridges 32 are the same as those of the ridges 22 described above, so detailed descriptions are omitted here. Further, in FIG. 4, the bottom portion 32 a of the groove extending along a line adjacent to the ridge 32 is shown by a dotted line.

Here, although the example in which the first facing surface 20 has a recessed portion 21 extending from the front end of the first jaw portion 1011 toward the first arm 101 is shown here, in the present invention, if the first facing surface 20 has The concave portion 21 extending at the front end of the first jaw portion 1011 may be sufficient, and the concave portion 21 may not necessarily extend in the direction in which the first arm 101 extends. The same applies to the concave portion 31 of the second facing surface 30. Although an example in which a plurality of ridges 22 extending in a direction in which the first arm 101 extends is provided in the recess 21 is shown here, in the present invention In the present invention, a plurality of ridges 22 extending from the front end of the first jaw portion 1011 may be provided on the concave portion 21, and the ridges 22 may not necessarily extend in the direction in which the first arm 101 extends. The same applies to the ridges 32 of the concave portion 31.

Furthermore, as shown in FIG. 3 (d), the ridges 22 and 32 are preferably at the front ends of the recesses 21 and 31. The curve or the line connecting the front ends of the ridges 22 and 32 is provided with A shaper that matches the shape of the head of a specific screw to be clamped.

In this embodiment, as an example, a description will be given of a case where the opening widths of the first jaw portion 1011 and the second jaw portion 1021 are minimized, the end face 24 at the front end of the first jaw portion 1011 and the recessed portion The part connected to the front end of 21 is located on the same plane as the part connected to the end face 34 of the front end of the second jaw 1021 and the front end of the recess 31. However, they may not be on the same plane. The opening width of the first jaw portion 1011 and the second jaw portion 1021 can also be regarded as, for example, the distance between the first facing surface 20 and the second facing surface 30, for example, the specific position on the first facing surface 20 and the second The distance between specific positions on the facing surface 30 and the like.

In addition, the end surface of the front end of the first jaw portion 1011 may be a flat surface, or may be a curved surface or a polyhedron shape that is raised at the center side in the width direction. In addition, a portion on the first facing surface 20 side of an end surface of the front end of the first jaw portion 1011 may have a shape in which a part of the ridges 22 in the concave portion 21 protrude. This also applies to the end surface of the front end of the second jaw portion 1021.

A plurality of ridges 25 and ridges 35 extending in the width direction are provided in a portion other than the recessed portion 21 of the first facing surface 20 and a portion other than the recessed portion 31 in the second facing surface 30. Similarly, a plurality of ridges 26 and ridges 36 extending in the width direction are also provided on the clamping surface 23 and the clamping surface 33. In addition, the cross-sectional shape, number, pitch, and the like of these ridges 25, ridges 35, ridges 26, and ridges 36 are not limited. In addition, the ridge 25 and the ridge 35 may be provided at positions facing each other, or may be provided at positions not facing each other. The same applies to the ridges 26 and the ridges 36. For example, a plurality of ridges 25 and ridges 35 having the same interval may be arranged with only half the pitch of the ridges offset. Thereby, the unevenness | corrugation comprised by the several convex line 25 and the convex line 35 can also be engaged.

The shape of the first facing surface 20 and the second facing surface 30 may be a plane-symmetrical shape or a non-plane-symmetrical shape.

The water pump pliers 1 has, for example, a structure in which the direction of the opening portion formed by the first jaw portion 1011 and the second jaw portion 1021 is the direction in which the first arm portion 1012 of the first arm 101 extends and the second arm 102 The direction in which the second handle portion 1022 extends partially does not become parallel. The direction of the opening portion formed by the first jaw portion 1011 and the second jaw portion 1021 is, for example, the center line in the width direction of the first facing surface 20. The direction in which the bisector of an angle formed by the center line in the width direction of the second facing surface 30 extends. For example, the water pump pliers 1 has a shape in which a surface at an equal distance from the first facing surface 20 of the first jaw portion 1011 and the second facing surface 30 of the second jaw portion 1021 extends with the first handle portion 1012 of the first arm 101 And the direction in which the second handle portion 1022 of the second arm 102 extends are not parallel.

The recessed portion 21 of the first facing surface 20 and the recessed portion 31 of the second facing surface 30 are used to hold the head of a screw or the like. The head of a screw may be, for example, a head of a bolt or a head of a rivet. In addition, the types of screws are not limited. For example, as shown in FIGS. 3 (b) and 3 (c), the user can hold the first handle portion 1012 and the second handle portion 1022 with a hand or the like, and can insert a screw hole (not shown) of the object 55, etc. The head of the screw 56 is sandwiched between the front end side of the recessed part 21 and the front end side of the recessed part 31 to hold the head of the screw 56. At this time, the convex portion 22 of the concave portion 21 and the convex portion 32 of the concave portion 31 can partially apply force to the head of the screw 56, and the protruding portion becomes a non-slip when clamping, and the head of the screw 56 can be strongly clamped. The front end of the recessed portion 21 is an end portion on the first end portion 101 a side of the recessed portion 21, and the front end of the recessed portion 31 is an end portion on the first end portion 102 a side of the recessed portion 31.

At least the front end side of the ridge 22 provided on the recessed portion 21 included in the first facing surface 20 and at least the front end side of the ridge 32 provided on the recessed portion 31 provided on the second facing surface 30 are to close the first jaw portion 1011 With the state of the second jaw portion 1021, as the front end of the first jaw portion 1011 and the front end of the second jaw portion 1021 are separated, the ridges are inclined away from each other. The front end side of the ridge 22 is a portion on the front end side of the first jaw portion 1011 of the ridge 22. The front end side of the ridge 32 is a portion on the front end side of the second jaw portion 1021 of the ridge 32. The so-called slanting of the convex strips away from each other means that the convex strips 22 and the convex strips 32 can be regarded as being slanted such that the interval between the convex strips 22 and the convex strips 32 becomes wider. In addition, as described above, the inclined portion may be only the front ends of the ridges 22 and 32, or may be the entire ridges 22 and 32. Here, it is shown as an example that the ridges 22 and the ridges 32 are all curved into a curved shape. As the front ends of the first and second jaws 1011 and 1021 are separated, the ridges 22 and the ridges 32 After leaving, the convex strip 22 and the convex strip 32 gradually approach each other as they leave the front end.

The front ends of the ridges 22 and the ridges 32 are preferably inclined so as to be parallel to the state where the head of a specific screw is sandwiched between the ridges 22 and the front ends of the ridges 32. It should be noted that the case where there is an inclination having an error range may be regarded as parallel.

For example, as shown in FIG. 3 (b), when the head of a specific screw, such as a screw hole, is sandwiched between the tip of the recess 21 of the first jaw 1011 and the tip of the recess 31 of the second jaw 1021, as shown in FIG. As shown in 3 (c), since the front ends of the ridges 22 of the recessed portion 21 and the ridges 32 of the recessed portion 31 are parallel, the ridges 22 of the recessed portion 21 and the ridges 32 of the recessed portion 31 can hold the head of the screw in a lateral direction. While reducing the screw from the top side The strength of the head force makes it difficult for the head of the screw to fall off. In addition, increasing the contact area between the ridges 22 in the recessed portion 21 and the ridges 32 in the recessed portion 31 and the head of the screw makes it difficult to slide. In the state shown in FIGS. 3 (b) and 3 (c), the apex of the tip of the ridge 22 at the center of the recess 21 of the first jaw 1011 and the ridge at the center of the recess 31 of the second jaw 1021 are connected. The triangle formed by the vertex of the 32 front end and the rotation center 1031 of the connecting shaft 103 becomes an isosceles triangle.

On the other hand, when the front ends of the ridges 22 of the concave portion 21 and the ridges 32 of the concave portion 31 are not inclined, the front ends of the ridges 22 of the concave portion 21 and the ridges 32 of the concave portion 31 are inclined outward. That is, in the state where the front end side is expanded outward, the head of the screw is clamped, and since the protrusion 22 of the recessed portion 21 and the protrusion 32 of the recessed portion 31 exert an oblique force on the head of the screw, it may occur from the upper side. The component of the force that pushes the head of the screw, and with this stress, the entire water pump pliers 1 moves to the opposite side of the first end portion 101a, and easily falls off the head of the screw.

Furthermore, if the front end side of the ridge 22 of the recessed portion 21 and the front end side of the ridge 32 of the recessed portion 31 are inclined, the head of a screw having a size other than the head of a specific screw (for example, the head is larger than the specific screw) In the case of screws (heads such as screws), the heads of the screws can be clamped in a nearly parallel state compared to the case without tilting, which can increase the contact area and reduce the amount of force that pushes the heads of the screws from the upper side. The head of the screw does not come off easily. The inclination angle of the front end side of the recessed part 21 and the inclination angle of the front end side of the recessed part 31 are preferably the same angle.

With regard to the water pump pliers 1 of this embodiment, the above-mentioned locking structure 104 is used to lock the connecting shaft 103 to open the jaw at the position where the opening width of the first jaw 1011 and the second jaw 1021 is the narrowest. In the state of rotation, the rotation center 1031 of the connecting shaft 103 is located at an equal distance from the front end of the first facing surface 20 and the front end of the second facing surface 30. The opening width of the first jaw portion 1011 and the second jaw portion 1021 means that, for example, when the first arm 101 and the second arm 102 are rotated around the connecting shaft 103 as the center, the first jaw portion 1011 may be the first The distance between the first facing surface 20 and the second facing surface 30 when the one facing surface 20 and the second facing surface 30 of the second jaw 1021 are closest to each other may be the distance between the first facing surface 20 and the second facing surface 30. The distance when away. The distance between the first facing surface 20 and the second facing surface 30 here is, for example, the distance between a point of the first facing surface 20 and a point on the second facing surface 30 opposite to this point, and may also be the first The distance between the front end of the facing surface 20 and the front end of the second facing surface 30. The state in which the connecting shaft 103 is locked at the position where the opening width of the first jaw portion 1011 and the second jaw portion 1021 is the narrowest is, for example, the connecting shaft 103 is locked at the side of the sliding hole 1013 closest to the first jaw portion 1011. The status of the location. The front end of the first facing surface 20 is, for example, a portion located on the foremost side of the first facing surface 20, and the front end of the second facing surface 30 is an example. For example, it is located at the foremost side of the second facing surface 30. The front end of the first facing surface 20 and the front end of the second facing surface 30 can also be regarded as, for example, the front end of the first facing surface 20 and the second facing surface with the first jaw portion 1011 and the second jaw portion 1021 closed. A point at the front end of the facing surface 30. In this case, a point at the front end of the first facing surface 20 and a point at the front end of the second facing surface 30 are, for example, a vertex on the front end side of the ridge 22 provided at the center of the recess 21 (the deepest position) and the center of the recess 31. (Deepest position) A vertex on the front end side of the ridge 32. In addition, the location on the foremost side of the first facing surface 20 and the location on the foremost side of the second facing surface 30 may be used.

Furthermore, the center of rotation of the connecting shaft 103 is locked by the locking structure 104 at the position where the opening width of the first jaw portion 1011 and the second jaw portion 1021 is the narrowest, and the jaw is opened. The structure of 1031 at the same distance from the front end of the first facing surface 20 and the front end of the second facing surface 30 can also be considered as including the following structure: the locking structure 104 is located between the first jaw portion 1011 and the first At the position where the opening width of the second jaw portion 1021 is the narrowest, the connecting shaft 103 is locked and the jaw is opened, connecting a point at the front end of the first facing surface 20, a point at the front end of the second facing surface 30, and the connecting shaft 103. The triangle constituted by a point on the rotation center 1031 is an isosceles triangle with a side connecting a point at the front end of the first facing surface 20 and a point at the front end of the second facing surface 30 as a base. In this case, a point at the front end of the first facing surface 20 and a point at the front end of the second facing surface 30 are the same as described above. Preferably, at least a part of the first side other than the bottom side of the isosceles triangle is an edge on the first facing surface 20, and at least a part of the second side other than the isosceles is on the second facing surface 30. side.

With this structure, in a state where the connecting shaft 103 is locked at the position where the opening width of the first jaw portion 1011 and the second jaw portion 1021 is the narrowest by the locking structure 104, the concave portion of the first facing surface 20 is locked. When the front end side of 21 and the front end side of the recessed portion 31 of the second facing surface 30 clamp the head of the screw, the rotation center 1031 of the connecting shaft 103 is usually located on the extension of the shaft of the screw to be clamped, so refer to the connecting shaft. The position of 103 intuitively performs alignment and the like when grasping the screw.

In addition, with this structure, the distance from the rotation center 1031 of the connection shaft 103 to the front end of the first facing surface 20 and the distance from the rotation center 1031 of the connection shaft 103 to the front end of the second facing surface 30 can be made the same. The distance is because the first facing surface 20 caused by the movement of the first jaw portion 1011 and the second jaw portion 1021 centered on the rotation center 1031 of the connecting shaft 103 when the first handle portion 1012 and the second handle portion 1022 are held. The moving distance of the front end is the same as the moving distance of the front end of the second facing surface 30, so that it is easy to perform alignment when clamping the head of the screw and the like.

For example, in this embodiment, the front end of the first facing surface 20 and the front end of the second facing surface 30 are arranged so that the head of the screw to be clamped is positioned at an intermediate position, and if the first handle portion 1012 and In the second handle portion 1022, the front end side of the ridge 22 of the recessed portion 21 provided on the first facing surface 20 and the front end side of the ridge 32 of the recessed portion 31 provided on the second facing surface 30 are at the same timing. Since it abuts on both sides of the head of the screw, it is easy to grip the head of the screw.

In addition, when the distance between the distance from the rotation center 1031 to the front end of the first facing surface 20 and the distance from the rotation center 1031 to the front end of the second facing surface 30 is within an error range, it can also be regarded as the rotation center from the connecting shaft 103. The distance from 1031 to the front end of the first facing surface 20 is the same as the distance from the rotation center 1031 to the front end of the second facing surface 30.

With respect to the water pump pliers 1 of the present embodiment, as shown in FIGS. 1 to 3 and the like, the coupling shaft is formed at the position where the opening width of the first jaw portion 1011 and the second jaw portion 1021 is the narrowest by using the locking structure 104 described above. In the locked state 103, the rotation center 1031 of the connecting shaft 103 is positioned on a plane at an equal distance from the first facing surface 20 and the second facing surface 30. In this case, the first facing surface 20 and the second facing surface 30 can be considered as the surfaces in which the recesses 21 or 31, the ridges 25, and the ridges 35 provided on the respective surfaces are ignored or removed, and can also be considered as: Located at the middle of the height of the ridge 25 and the ridge 35, the plane at the height of the average and maximum, minimum, and median heights of the respective heights of the ridge 25 and the ridge 35, with the ridge 25 and the ridge 35 A plane to be sandwiched, or a surface passing through the apex or root of the ridges 25 and 35. The planes of equal distance in this case are, for example, imaginary planes. This surface is generally a flat surface, but it can also be a curved surface. For example, as shown in FIG. 3 (b), for convenience, let the first facing surface 20 be the plane 20a where the front end of the convex strip 25 is located. For convenience, let the second facing surface 30 be the convex strip 35. In the plane 30a where the front end of the pump is located, the rotation center 1031 of the water pump pliers 1 is positioned on the plane 60 which is equal to the plane 20a and the plane 30a. It should be noted that a plan view of the plane 20a, the plane 30a, and the plane 60 as viewed from the lateral direction is shown here. The surface of the same distance from the first facing surface 20 and the second facing surface 30 is, for example, the length of a line segment that descends from an arbitrary point on the surface perpendicular to the first facing surface 20 and the second facing surface 30. Become faces of the same length.

With this structure, in a state where the connecting shaft 103 is locked at the position where the opening width of the first jaw portion 1011 and the second jaw portion 1021 is the narrowest by the locking structure 104, the concave portion of the first facing surface 20 is locked. When the front end side of 21 and the front end side of the recessed portion 31 of the second facing surface 30 sandwich the head of the screw, etc., the rotation center 1031 of the connecting shaft 103 is usually located on the extension of the shaft such as the screw to be clamped. The position of the connecting shaft 103 is intuitively adjusted when grasping the head of the screw or the like.

In addition, with this structure, since the first facing surface 20 and the second facing surface 30 can be moved at an angle formed by the respective normals and the moving direction of the respective surfaces, it is easy to predict that the The movement of the first facing surface 20 and the second facing surface 30 when the surface 20 and the second facing surface clamp the head of the screw is not complicated, so the positioning can be easily performed when the head of the screw is clamped. It is easy to pinch the head of the screw. In addition, for example, the recess 21 of the upper jaw (for example, the first jaw 1011 in FIG. 1) of the upper jaw (for example, the first jaw 1011 in FIG. 1) is placed on the upper side of the first jaw 1011 and the second jaw 1021 to abut the side surface of the screw such as the head In a state, when the first handle portion 1012 and the second handle portion 1022 are held, the front end of the second facing surface 30 of the lower jaw (for example, the second jaw 1021 in FIG. 1) is tied to the first The direction in which the facing surface 20 is parallel may not be moved forward or substantially forward than the front end of the first facing surface 20, so that the front end of the second facing surface 30 may not push the head on which the screw is mounted. The other members can reduce the positional deviation and the like when clamping the head of the screw, and can easily clamp the head of the screw. The moving direction of the first facing surface 20 and the second facing surface 30 here is, for example, the circumferential direction of a concentric circle centered on the rotation center 1031 of the connecting shaft 103.

In contrast, it is assumed that the conventional water pump pliers shown in FIG. 11 are different from the present application, and are connected at the position where the opening width of the first jaw portion 1011 and the second jaw portion 1021 is the narrowest by the locking structure 104. In the state where the shaft 103 is locked, the rotation center 1031 of the connecting shaft 103 is not positioned on the water pump pliers at a distance equal to the first facing surface 20 and the second facing surface 30, and the first facing surface 20 and the first When the two facing surfaces 30 move with the connecting axis 103 as the rotation axis, the angles formed by the respective normals and the moving directions of the respective surfaces are not fixed, so it is difficult to predict that the first facing surface 20 and the second facing surface will be sandwiched. The movement of the first facing surface 20 and the second facing surface 30 when the head of the screw is waiting, since the respective movements are also complicated, it is not easy to perform the positioning and the like when clamping the head of the screw, and it is not easy to hold the screw. First Class. For example, in this kind of water pump pliers, for example, the recessed part 21 of the upper jaw (for example, the first jaw 1011 in FIG. 1) abuts the first jaw 1011 and the second jaw 1021. When the first handle portion 1012 and the second handle portion 1022 are held in the state of the first side of the screw, the second facing surface of the lower jaw (for example, the second jaw 1021 in FIG. 1) is located on the lower side. The front end of 30 moves in a direction parallel to the first facing surface 20 to a position more forward than the front end of the first facing surface 20, so the front end of the second facing surface 30 pushes a member such as a screw head, etc., The front end side of the first end portion of the water pump pliers moves. Therefore, when the head of the screw is clamped, the height of the front end of the recessed portion 21 and the end of the recessed portion 31 and the head of the screw are different, resulting in the lower jaw. The front end portion of the facing surface of the part may not abut the side surface of the head of the screw, etc., and the head of the screw may not be properly clamped.

For example, according to the results of intensive research by the inventors of the present application, it is considered that the poor operation of the water pump pliers illustrated in FIG. 11 described in the prior art is also described here: The position where the opening width is the narrowest causes the coupling shaft to be locked, because the rotation center of the coupling shaft 93 is not located on a surface at an equal distance from the facing surface of the first jaw 91 and the facing surface of the second jaw 92.

In addition, when the offset of the rotation center 1031 from a plane of equal distance from the first facing surface 20 and the second facing surface 30 is within the error range, it can also be regarded as the rotation center 1031 of the connecting shaft 103 is located away from the surface. The first facing surface 20 and the second facing surface 30 are at equal distances. The deviation of the error range here is preferably within ± 3mm, and even better within ± 2mm.

Furthermore, although the case where the head of the screw is grasped has been described in the above-mentioned embodiment, the present invention is also applicable to a case where an object to be clamped other than the head of the screw is clamped. In this case, the same effects as described above can be obtained. Here, objects to be clamped other than screws are, for example, rivets or bolts. In addition, the screw grasped in the present invention may be a screw having any shape, for example, a cylindrical shape, an oblong shape, or a circular shape.

In this embodiment, the first handle portion 1012 and the second handle portion 1022 have a straight line extending from the side of the first arm 101 or the second arm 102 connected by the connecting shaft 103 to the side of the second end portion 101b or 102b. shape. However, the first handle portion 1012 and the second handle portion 1022 may have a shape other than a shape extending linearly, and may have a curved shape or the like, for example.

A removable cover member 107 is attached to the side opposite to the side where the first arm 101 and the second arm 102 of the first handle portion 1012 face each other. A detachable cover member 107 is attached to the opposite side of the first arm 101 and the second arm 102 facing the second handle portion 1022. In addition, the side where the first arm 101 and the second arm 102 facing each other of the first arm 101 and the second arm 102 are sometimes called the inside and the opposite side is called the outside.

The cover member 107 attached to the first handle portion 1012 of the first arm 101 has a shape extending along the first handle portion 1012 of the first arm 101. The cover member 107 attached to the second handle portion 1022 of the second arm 102 has a shape extending along the second handle portion 1022 of the second arm 102. In the following, a case where the cover members 107 mounted on the first handle portion 1012 and the second handle portion 1022 have the same shape will be described as an example. However, these cover members may also have different shapes. Both ends in the longitudinal direction of the cover member 107 are open. The two ends in the longitudinal direction of the cover member 107 are, for example, end portions on the first end portions 101 a and 102 a side and the second end portions 101 b and 102 b side of the first arm 101 or the second arm 102. An example is shown in which the cover member 107 is provided with a band-shaped opening 1072 extending in the longitudinal direction. Here, the band-shaped openings 1072 are provided so as to reach both ends in the longitudinal direction of the cover member 107. In other words, banded The opening portion 1072 is provided so as to connect between both ends in the longitudinal direction of the cover member 107, and the band-shaped opening portion 1072 is connected to a portion opened at both ends. The width of the opening 1072 may be constant or not constant. The planar shape of the opening 1072 may be a shape extending in the longitudinal direction other than the strip shape.

As shown in FIG. 5 (f), the cover member 107 has a C-shaped cross section perpendicular to the length of the portion where the opening portion 1072 extending in a band shape is provided. The C-shaped inner portion of the cover member 107 (hereinafter referred to as C-shaped inside) 1075 becomes hollow. Here, since the band-shaped opening 1072 is provided so as to reach both ends in the longitudinal direction of the cover member 107, a vertical cross section of any portion in the longitudinal direction has a C-shape. The C shape may be formed by a curve, a straight line, or a combination of a curved line and a straight line. Here, a shape in which a part of the ring shape is missing can be regarded as a C shape. Further, the outer edge portion of the ring shape in this case may have any shape, and may have, for example, unevenness. In addition, the shape of the outer edge portion may be a shape that enlarges the shape on the C-shaped inner portion 1075 side, or a shape different from the C-shaped inner portion 1075 side. Here, the cross section of the cover member 107 is a horizontal octagon with two opposite sides as upper and lower sides, and has a shape in which the lower side portion is an opening portion. The cover member 107 has a band-shaped opening portion 1072 extending in the longitudinal direction, and the opening portion 1072 is connected to the C-shaped inner portion 1075 of the cover member 107. This opening 1072 is a part corresponding to the above-mentioned C-shaped opening. The widest portion of the C-shaped inner portion 1075 of the cover member 107 is wider than the width of the band-shaped opening portion 1072.

In addition, when the cover member 107 is mounted on the first handle portion 1012 or the second handle portion 1022, if the cross-sectional shape is a C-shape, the end shape can also be regarded as having a C-shape. For example, when the cover member 107 has elasticity, a cross-sectional shape perpendicular to the longitudinal direction of the cover member 107 in a state of being detached from the first handle portion 1012 and the second handle portion 1022 may be as shown in FIG. 10 (a). The first modification is a shape in a state where the C-shaped openings are in contact. It should be noted that the state where the C-shaped openings are in contact with each other can also be regarded as C-shaped here. In addition, this cross-sectional shape can also be regarded as a shape in which a linear cross-section is formed in a part of the O-shape. Moreover, when the cover member 107 is mounted on the first handle portion 1012 or the second handle portion 1022, the opening portion of the C-shaped contact may be inserted into the first handle portion 1012 or the second handle portion 1022 to become In the non-contact state, the cross-sectional shape in the longitudinal direction of the cover member 107 is C-shaped as shown in FIG. 5 (f). For example, the opening portion 1072 may be in a state of being attached to the first handle portion 1012 and the second handle portion 1022, having a shape extending in a band shape, and may be detached from the first handle portion 1012 and the second handle portion 1022. , Both sides along the longitudinal direction of the cover member 107 are brought into contact with each other to be in a closed state. Such an opening 1072 can also be regarded as a band-shaped opening 1072.

The cover member 107 attached to the first arm 101 has a locking surface 1071 at a portion on the side of the second end portion 101 b of the first arm 101 when the cover member 107 is attached to the first arm 101. Similarly, when the cover member 107 attached to the second arm 102 is attached to the second arm 102, the cover member 107 has a locking surface 1071 at a portion on the side of the second end portion 102 b of the second arm 102. Here, the case where the part which becomes the 1st end part 101a side (or the 1st end part 102a side) of the cover member 107 cuts the opening part 1072 side is shown as an example. However, the cover member 107 does not need to cut the opening 1072 side. The C-shaped cross section of the cover member 107 is a portion other than the cut portion. The locking surface 1071 is, for example, one of the end faces in the longitudinal direction of the cover member 107. The locking member side opening of the cover member 107 has a planar shape having the same shape as the cross section shown in FIG. 5 (f). In addition, here, the locking surface 1071 of the cover member 107 has the same end surface as the locking surface 1071 on the opposite side. However, if the cover member 107 can be embedded in the first handle portion 1012 or the second handle portion 1022, the cover member 107 may not be opened. Here, as an example, the case where the cover member 107 has a shape where the height continuously decreases toward the locking surface 1071 is shown. However, the thickness of the cover member 107 may be uniform, or the thickness may be changed in steps.

The surface shape and the like of the cover member 107 are not limited. The surface shape of the cover member 107 is preferably a shape having, for example, a groove or unevenness for anti-slip.

The material of the cover member 107 in this embodiment is not limited. The material of the cover member 107 is, for example, resin. However, the material of the cover member 107 may be rubber, wood, metal, or the like.

A first inserting portion 1014 is provided on the outside of the first handle portion 1012 of the first arm 101 of the cover member 107. The first inserting portion 1014 has a C shape that can be inserted into the cover member 107 through a band-shaped opening 1072. 1075 shape. In addition, a second embedding portion 1024 is provided on the outside of the second handle portion 1022 of the second arm 102 of the cover member 107. The second embedding portion 1024 is provided with a band-shaped opening portion 1072 that can be inserted into the cover member 107. The shape of the C-shaped interior 1075. The longitudinal cross-sectional shapes of the first inserting portion 1014 and the second inserting portion 1024 are, for example, shapes that combine the cross-sectional shape inside the cover member 107 and the cross-sectional shape of the band-shaped opening portion 1072. The first insertion portion 1014 and the second insertion portion 1024 preferably have a shape in which, for example, the attached cover member 107 does not easily fall off. For example, it is preferable that the width of the widest portion of the first insertion portion 1014 and the second insertion portion 1024 is wider than the width of the band-shaped opening portion 1072 of the cover member 107. The widths of the first embedding portion 1014 and the second embedding portion 1024 are equivalent to the length in the width direction of the band-shaped opening portion 1072 of the cover member 107 embedded in the first embedding portion 1014 and the second embedding portion 1024. The first embedding portion 1014 and the second embedding portion 1024 are preferably in a state of being embedded in the C-shaped inner portion 1075 of the cover member 107, and are not likely to be shaken or shifted, and are preferably formed in a C shape with the cover member 107 The figure-shaped inner part 1075 is fitted. However, even if some unevenness is provided on the surfaces of the first embedding portion 1014 and the second embedding portion 1024, other portions will be fitted. If this unevenness has little effect on the fitting of the two, here, you can also see Made with a fitted shape. In addition, if the shape is substantially the same as the shape of the C-shaped inner portion 1075 side of the cover member 107, even if there is a slight gap or the like in the fitted state, it can be regarded as fitting if there is no shake or the like.

The portion that becomes the root of the first insertion portion 1014 of the first handle portion 1012 of the first arm 101 is sandwiched between the cover member 107 and the first handle portion 1012 and has a band-shaped opening portion 1072 that is the cover member 107. Shape of the state. Similarly, the portion that becomes the root of the second insertion portion 1024 of the second handle portion 1022 of the second arm 102 has a band-shaped opening portion 1072 that becomes the cover member 107 in a state where the cover member 107 is fitted into the second handle portion 1022. Shapes such as the sandwiched state. Accordingly, in a state where the cover member 107 having a C-shaped cross section is fitted into the first handle portion 1012 and the second handle portion 1022, the cover member 107 is prevented from rotating around each handle portion, thereby preventing deterioration of workability and safety. Deterioration.

Here, the case where the 1st insertion part 1014 and the 2nd insertion part 1024 are the shape fitted in the C-shaped inside 1075 of the cover member 107 is demonstrated as an example. Specifically, the first inserting portion 1014 and the second inserting portion 1024 have a shape that fits the cross section of the C-shaped inner portion 1075 of the cover member 107 shown in FIG. 5 (f) and extends to the first arm 101 and A case of a rail-like shape in a direction in which the second arm 102 extends will be described as an example. In addition, as described later, in order to fit the cover member 107 on the connecting shaft 103 side of the first fitting portion 1014 and the second fitting portion 1024, the width is reduced as it approaches the connecting shaft 103.

A first cover locking portion 1015 is provided on the second end portion 101b side of the first arm 101 to which the cover member 107 is attached. The first cover locking portion 1015 is connected to the cover member 107 attached to the first handle portion 1012. The locking surface 1071 is locked to prevent the cover member 107 from moving toward the second end portion 101b. Similarly, a second cover locking portion 1025 is provided on the second end portion 102b side of the second arm 102 to which the cover member 107 is attached, and the second cover locking portion 1025 is connected to a cover attached to the second handle portion 1022. The locking surface 1071 of the member 107 is locked to prevent the cover member 107 from moving to the second end portion 102b side. The cover member 107 is attached to the first handle portion 1012 or the second handle portion 1022 such that the locking surface 1071 and the first cover locking portion 1015 or the second cover locking portion 1025 are locked. The height of the first cover locking portion 1015 and the second cover locking portion 1025 is 2 mm or more, but it is preferable to prevent the cover member 107 from shifting or falling off during operation.

The shapes of the first cover locking portion 1015 and the second cover locking portion 1025 are not limited. As long as the first cover locking portion 1015 and the second cover locking portion 1025 are in contact with at least a part of the locking surface 1071, a person who moves the cover member 107 can be prevented. Here, the first cover locking portion 1015 and the second cover locking portion 1025 are lifted. The display is shown as an example for the case where the step difference is provided adjacent to the 2nd end part 101b side of the 1st insertion part 1014, and the 2nd end part 102b side of the 2nd insertion part 1024, respectively. This step difference is a step difference of a portion having a bulge on the locking surface 1071 side. Furthermore, instead of a step provided with a step or the like, protrusions or the like may be provided as the first cover locking portion 1015 and the second cover locking portion 1025.

In addition, in this embodiment, the first connecting shaft side cover locking portion 1016 and the second connecting shaft side cover locking portion 1026 are also provided on the connecting shaft 1032 side of the first handle portion 1012 and the second handle portion 1022. The first connection shaft side cover locking portion 1016 and the second connection shaft side cover locking portion 1026 are in contact with the strip-shaped opening 1072 adjacent to the end portion on the connection shaft 1032 side of the cover member 107 described above. surface. The surfaces adjacent to the band-shaped openings 1072 on the ends of the connecting member 1032 side of the cover member 107 are engaged with the first connecting shaft-side cover locking portion 1016 and the second connecting shaft-side cover locking portion 1026, respectively. This prevents the cover member 107 from being easily moved to the connection shaft 103 side, so as to prevent the cover member 107 from being shifted to the connection shaft 103 side. Here, portions of both sides of the band-shaped opening 1072 of the cover member 107 of the first handle portion 1012 and the second handle portion 1022 are recessed so as to engage with both sides of the band-shaped opening 1072. Thus, the first cover locking portion 1015 as described above is provided. The second cover locking portion 1025, the first connecting shaft side cover locking portion 1016, and the second connecting shaft side cover locking portion 1026. The height of the first connecting shaft side cover locking portion 1016 and the second connecting shaft side cover locking portion 1026 is 2 mm or more, but it is preferable to prevent the cover member 107 from shifting or falling off during operation.

The cover member 107 attached to the first arm 101 is attached to the first arm 101 by making the cover member 107 from the first end portion 101 a side to the second end portion 101 b side of the first arm 101. Slide so that the first insertion portion 1014 of the first arm 101 to which the cover member 107 is mounted is inserted into the cover member 107 from a portion opened from the locking surface 1071 side of the cover member 107. Here, the locking surface 1071 side of the cover member 107 may be regarded as the second end portion 101 b side of the first arm 101 of the cover member 107.

Similarly, the cover member 107 attached to the second arm 102 is attached to the second arm 102 by making the cover member 107 from the first end portion 102 a side to the second end of the second arm 102. The portion 102 b slides on the side so that the second insertion portion 1024 of the second arm 102 on which the cover member 107 is mounted is inserted into the cover member 107 from a portion opened from the locking surface 1071 side of the cover member 107. The locking surface 1071 side of the cover member 107 here can also be regarded as the second end portion 102b side of the second arm 102 of the cover member 107.

6 is a perspective view (FIG. 6 (a) -FIG. 6 (c)) and a side view (FIG. 6 (d) -FIG. (F) showing a method of mounting the cover member 107 on the first handle portion 1012 of the first arm 101 )). Hereinafter, a method of attaching the cover member 107 to the first arm 101 will be described using FIG. 6.

First, as shown in FIGS. 6 (a) and 6 (d), the cover member 107 is arranged such that the opening portion 1072 faces the first arm 101 side, and the cover member 107 is positioned on the locking surface 1071 side of the cover member 107. It is moved so as to be fitted into the coupling shaft 103 side of the first fitting portion 1014. Here, as described above, the width of the first inserting portion 1014 on the connecting shaft 103 side is continuously widened toward the second end portion 101b side, so that it is easy to fit.

Then, as shown in FIGS. 6 (b) and 6 (e), the cover member 107 is slid from the connecting shaft 103 side to the second end portion 101b side, and the first insertion portion 1014 is gradually inserted into the C shape of the cover member 107 in order. 6 (c) and 6 (f), the cover member 107 is slid until the locking surface 1071 of the cover member 107 and the first cover locking portion 1015 of the first arm 101 are locked. By locking the locking surface 1071 of the cover member 107 with the first cover locking portion 1015 of the first arm 101, as shown in FIG. 1 (b), the cover member 107 is mounted on the first arm 101 On the handle part 1012. To remove, just do the opposite operation.

Although the cover member 107 is attached to the first arm 101 has been described here, the cover member 107 is attached to the second arm 102 as described above, and detailed description is omitted here.

By attaching the cover member 107 shown in this embodiment, the grip feeling and the like of the water pump pliers 1 can be improved, and workability can be improved. For example, workability can be improved by attaching a cover member 107 having a thickness suitable for a user's hand size or the like.

Further, in this embodiment, the cover member 107 can be prevented by providing the first cover locking portion 1015 and the second cover locking portion 1025 that are locked with the locking surface 1071 of the cover member 107 to prevent the cover member 107 from moving. It comes off from the 2nd end part side of the 1st arm 101 and the 2nd arm 102. In particular, with respect to the water pump pliers 1 of this embodiment, the recess 21 of the first jaw 1011 and the recess 31 of the second jaw 1021 can be used to pull or rotate the screw, etc. Although it is generally considered that the strong force pulled in the direction of the second end portion 101b and the direction of the second end portion 102b will act on the cover member 107 mounted on the first handle portion 1012 and the second handle portion 1022, respectively, as in the present application, By providing the first cover locking portion 1015 and the second cover locking portion 1025 that are locked with the locking surface 1071 of the cover member 107, the cover member 107 can be reliably prevented from moving in the direction of the second end portion 101b and the second end portion 102b. Directional deviations and the like improve workability, safety, and the like of work performed by clamping the head of a screw and the like.

In addition, in this embodiment, since the cover member 107 is slid into the first arm 101 and the second arm 102, the cover member 107 is easily slidable in the direction of the second end portion 101b and the direction of the second end portion 102b. Structure, but by providing the first cover locking portion 1015 and the second cover locking portion 1025 that are locked with the locking surface 1071 of the cover member 107, the cover member 107 can be prevented from moving from the first handle portion 1012 and the second handle portion 1022 is offset in the direction of the second end portion 101b and the direction of the second end portion 102b.

In addition, in this embodiment, the cover member 107 is configured to slide into the first arm 101 and the second arm 102, and the cover member 107 can be attached and detached without using a fixing member such as a screw, and the cover member 107 can be made difficult. Dropped to the outside of the first arm 101 and the second arm 102.

In addition, in this embodiment, since the cover member 107 can be attached and detached without using a fixing member such as a screw, the cover member 107 can be easily attached and detached, and the cover member 107 can be easily replaced, and the cover member 107 can be cleaned and maintained.

In addition, in this embodiment, since the cover member 107 can be attached and detached without using a fixing member such as a screw, the user can freely install the cover member 107 suitable for the user, and the water pump pliers 1 can be easily customized. As a result, workability can be improved by attaching a cover member 107 suitable for the thickness of the user's hand, as described above. In addition, when the water pump pliers 1 are shared by many users, the water pump pliers 1 can be customized by changing the cover member 107 suitable for the users, and the users can easily use the water pump pliers 1.

The first handle portion 1012 and the second handle portion 1022 to which the cover member 107 is attached are preferably in a state in which the cover member 107 is removed, and have a non-slip shape in an exposed portion. The non-slip shape is a shape that is difficult to slide when a user holds the first handle portion 1012 and the second handle portion 1022 or holds the handle portions individually. For example, the non-slip shape is a shape provided with unevenness, for example. The concavities and convexities here may be protrusions or pits having a flat shape such as a circle or a rectangle, or grooves or the like having a line. The non-slip shape may be a shape in which a non-slip process used by a known handle portion such as a general tool is performed.

FIG. 7 is a front view (FIG. 7 (a)) and a back view (FIG. 7) showing an example of a water pump plier including a state in which a cover member 107 having a first handle portion 1012 and a second handle portion 1022 having a non-slip shape is removed. (b)). Here, as an example, a case where the non-slip shape is a plurality of recesses 40 having a planar shape arranged in a trapezoidal shape arranged outside the first handle portion 1012 and the second handle portion 1022 is shown. However, this non-slip shape is an example, and the present invention may have other non-slip shapes.

By having such a non-slip shape, in the state where the cover member 107 is removed, the first handle portion 1012 and the second handle portion 1022 can be prevented from sliding when the water pump pliers 1 are used, and the safety of the operation or the like can be improved. effectiveness.

Furthermore, as the cover member 107 attached to the first arm 101 and the second arm 102, a cover member 107 having various sizes, surface shapes, and materials can be used. The cover members 107 mounted on the first arm 101 and the second arm 102 may be the same cover member 107 or different cover members.

In addition, although the case where the cover member 107 is attached to both the first arm 101 and the second arm 102 has been described here, in the present invention, the cover member 107 may be attached to only one of them.

Here, although the lifting cover member 107 has both ends opened in the longitudinal direction, a band-shaped opening portion 1072 is provided to connect between both ends in the longitudinal direction, and a vertical cross section of any portion in the longitudinal direction is C-shaped. The case of the shape is described as an example, but if the cover member 107 of the present invention has a band-shaped opening 1072 extending in the longitudinal direction of the cover member 107, the band-shaped opening 1072 reaches at least one end of the cover member 107. The cross section perpendicular to the longitudinal direction of the opening 1072 may be C-shaped. In addition, the cover member 107 may be attached to the first insertion portion 1014 or the second insertion portion 1024 of the first arm 101 or the second arm 102 by sliding the end portion of the cover member 107 opened. That is, the band-shaped opening 1072 may reach at least one end in the longitudinal direction of the cover member 107, and may not reach both ends. A cross section perpendicular to the longitudinal direction of the opening 1072 here can also be regarded as a cross section perpendicular to the longitudinal direction of a portion having the opening 1072 of the cover member 107. Here, the end portion of at least one side where the opening 1072 of the cover member 107 reaches is, for example, the second end portion 101b or the second end portion 102b when it is mounted on the first arm 101 or the second arm 102. Of the end. The strip-shaped opening 1072 is preferably opened at the end of one side. The above-mentioned end portion of the cover member 107 that is opened may be an end portion of the cover member 107 that the belt-shaped opening portion 1072 reaches, or a portion that reaches the end portion of the cover member 107 by the belt-shaped opening portion 1072. The end portion of the cover member 107 that the band-shaped opening portion 1072 reaches is usually the end portion of the cover member 107 on the second end portion side of the arm of the cover member 107. In addition, the sliding here is, for example, sliding from the first end portion side to the second end portion side of the first arm 101 or the second arm 102. In addition, it is preferable that a portion of the cover member 107 that is open at an end portion of at least one side is connected to the band-shaped opening portion 1072. In addition, here, the part which cut off the edge part can also be considered as a part of edge part.

For example, as shown in FIG. 10 (b), the portion of the cover member 107 on the side of the connecting shaft 1032 may not be provided with a band-shaped opening 1072, so that the cross-section in the longitudinal direction of this portion does not become C-shaped. For example, the cross section in the longitudinal direction of this portion may be an O-shape. In addition, for example, as described above, the portion on the connecting shaft 1032 side of the portion of the cover member 107 that becomes the arm side may be cut. FIG. 10 (b) is a perspective view of the cover member 107 of the second modification in which the cross-section in the longitudinal direction of the portion of the cover member 107 that becomes the connecting shaft 1032 side is viewed from the opening 1072 side. The cross-sectional shape of the cover member 107 in this case does not become a C-shaped portion 1079. Specifically, the length of the portion 1079 in which the band-shaped opening 1032 is not provided is preferably one third of the length of the entire cover member 107. One or less. In this case, it is preferable that the first handle portion 1012 and the second handle portion 1022 have a shape that can fit into the cover member 107 whose cross section in the longitudinal direction does not become a C-shape. However, the first handle portion 1012 and the second handle portion 1022 may not have a shape capable of being embedded in the entire cover member 107, and for example, may have a cover member 107 capable of being embedded therein. The shape of the part of the band-shaped opening 1072 may be sufficient. Then, the cover member 107 is attached to the first arm 101 or the second arm 102 by making it from the first end portion 101a side to the second end portion 101b side (or from the first end portion 102a) (Side to the second end portion 102b side) to slide the inserting portion 1014 (or the inserting portion 1024 of the second arm 102) of the first arm 101 on which the cover member 107 is mounted from the portion (or the first Both end portions 102b side) are inserted into this cover member 107.

That is, the cover member 107 detachably attached to the water pump pliers of the present embodiment may be, for example, the following cover members. That is, it is a cover member having a band-shaped opening portion extending in the longitudinal direction, and this band-shaped opening portion is at least to an end portion that reaches one side of the cover member, and is perpendicular to the longitudinal direction of the portion having the band-shaped opening portion. The cross section of the cover is C-shaped, and it is mounted on the inserting portion by sliding it from the first end portion side to the second end portion side of the cover member, and the inserting portion is located at The first arm and the second arm on the opposite side of the handle portion of the arm on which the cover member is mounted have a shape that can be embedded inside the cover member.

FIG. 8 is a perspective view of the wrench-shaped portion 105 (FIG. 8 (a)), a sectional view of the wrench-shaped portion 105 along the line VIIIb-VIIIb (FIG. 8 (b)), and a sectional view of the wrench-shaped portion 105 along the VIIIc-VIIIc line ( Figure 8 (c)).

The wrench-shaped portion 105 is provided on the second end portion 101 b side of the first arm 101. In this embodiment, the case where the wrench-shaped portion 105 is provided at a portion other than the vicinity of the front end of the second end portion 101b on the second end portion 101b side of the first arm 101 will be described, but it may be provided near the front end. A wrench-shaped portion 105 is provided. Moreover, the wrench-shaped portion 105 need not be provided on the entire first arm 101. The wrench-shaped portion 105 has a shape in which the thickness is continuously reduced toward the front end of the second end portion 101b. The wrench-shaped portion 105 has a shape in which a cross section perpendicular to the direction in which the first arm 101 extends becomes a regular hexagon. Here, the direction in which the first arm 101 extends is a direction extending from the connecting shaft 103 to the second end portion 101 b side, and this direction may be regarded as the longitudinal direction of the wrench-shaped portion 105. As shown in FIGS. 8 (b) and 8 (c), the wrench-shaped portion 105 has a shape in which the cross-sections perpendicular to the longitudinal direction at different positions in the longitudinal direction are all regular hexagons. As described above, since the thickness of the wrench-shaped portion 105 decreases continuously toward the front end of the second end portion 101b, the size of the hexagon in cross section decreases as it approaches the front end of the second end portion 101b. The regular hexagon here may be a regular hexagon with corners rounded.

9 is a side view (FIG. 9 (a)) showing a state in which the wrench-shaped portion 105 is inserted into the first tube 50 having a planar shape in the opening portion 50a, and a state in which the wrench-shaped portion 105 is inserted into the first tube 50. Sectional view taken along the line IXb-IXb in Fig. 9 (a) (Fig. 9 (b)), IXc-IXc in Fig. 9 (a) 9 (c), a side view (FIG. 9 (d)) showing a state where the wrench-shaped portion 105 is inserted into the second tube 51 having a hexagonal plan shape in the opening portion 51a, and a wrench-shaped portion Sectional view taken along the line IXe-IXe of FIG. 9 (a) (FIG. 9 (e)) and FIG. 9 (a) taken along the line IXe-IXf (FIG. 9 (f)) .

Furthermore, in FIG. 9, the size of the opening portion 50 a of the first tube 50 is larger than the size of the opening portion 51 a of the second tube 51.

Since the cross-sectional shape of the wrench-shaped portion 105 in the longitudinal direction is a regular hexagon, the opening portion 50 a of the first tube 50 having a hexagonal planar shape can be fitted. As the size of the hexagon of the cross section of the wrench-shaped portion 105 increases as it moves away from the front end of the second end portion 101b, as shown in FIGS. 9 (a) to 9 (c), the first tube 50 will cross the wrench-shaped portion 105. The hexagonal shape is locked at a position corresponding to the size of the hexagonal opening portion 50 a of the first tube 50. Further, for example, the first tube 50 can be rotated by rotating the first arm 101 around a shaft extending in the longitudinal direction of the wrench-shaped portion 105 and passing through the center of the opening portion 50 a of the first tube 50 as a rotation center.

This case is also the same for the second tube 51. Since the size of the hexagon of the cross section of the wrench-shaped portion 105 decreases as it approaches the front end of the second end portion 101b, as shown in FIGS. 9 (d) to 9 (f), The second tube 51 having an opening portion 51 a having a smaller size than the opening portion 50 a of the first tube 50 is also stuck at a position where the hexagonal cross-sectional size of the wrench-shaped portion 105 is consistent with the size of the hexagonal opening portion 51 a of the second tube 51. set. Furthermore, since the size of the opening portion 51 a of the second tube 51 is smaller than that of the first tube 50, the second tube 51 is locked closer to the front end side of the wrench-shaped portion 105 than the first tube 50.

In this way, since the cross-sectional shape of the wrench-shaped portion 105 perpendicular to the longitudinal direction is hexagonal, and the size of the cross-sectional hexagon decreases as it approaches the front end of the second end portion 101b, a flat shape that can be inserted in different sizes is six The angular openings or holes are fitted and can be used as hexagon wrenches of different sizes.

By providing such a wrench-shaped portion 105, when the water pump pliers 1 are used for piping and the like, when the hexagonal wrench is required, the wrench shape portion 105 of the water pump pliers 1 can be used instead of the hexagonal wrench without the need to change tools. , Which can improve operation efficiency. In addition, since the wrench-shaped portion 105 can be used as a hexagonal wrench instead of various sizes, convenience is high. For example, the wrench-shaped portion 105 can be used for mounting telescopic sleeves of various diameters.

The second arm 102 is provided with a screwdriver-shaped portion 106 in the shape of a square-shaped screwdriver on the side of the second end portion 102b. The so-called square-shaped screwdriver shape is a rectangular shape with a predetermined thickness and width at the front end. shape. The screwdriver-shaped portion 106 has a flat-shaped screwdriver shape with a width at the front end of a threshold or less. The threshold value here is preferably 15 mm or less, and more preferably 12 mm or less. The width of the tip of the screwdriver-shaped portion 106 is, for example, 7 mm or more.

By having such a screwdriver-shaped portion 106, when a water pump pliers 1 is used for piping and the like, when a slotted screwdriver is needed, the screwdriver shaped portion 106 of the water pump pliers 1 can be used immediately as a slotted screwdriver without changing tools Etc., can improve work efficiency.

In the present embodiment, the case where the cross-sectional shape of the wrench-shaped portion 105 in the longitudinal direction is a regular hexagon has been described as an example. However, in the present invention, if the cross-sectional shape of the wrench-shaped portion 105 is positive n The angle (n is an integer of 3 or more) is sufficient, and even in this case, the same effect as described above can be obtained.

In the present embodiment, a case has been described in which the first arm 101 includes a wrench-shaped portion 105 and the second arm 102 includes a screwdriver-shaped portion 106. However, in the present invention, the first arm 101 may include a screwdriver The shape part 106 and the second arm 102 are provided with the wrench shape part 105. Even in this case, the same effect as that of the above-mentioned embodiment is obtained.

In addition, in the present invention, both the first arm 101 and the second arm 102 may be provided with the wrench-shaped portion 105, or both the first arm 101 and the second arm 102 may be provided with the wrench-shaped portion 105. In addition, in the present invention, only either one of the first arm 101 and the second arm 102 may include only one of the wrench-shaped portion 105 and the driver-shaped portion 106.

As described above, according to this embodiment, the first facing surface and the second facing surface are respectively provided at the front ends of the first jaw portion of the first arm and the second jaw portion of the second arm, and the first facing surface and the second facing surface are provided. Since the recesses are provided with ridges extending in the direction in which the first and second arms extend, the front end of the recessed portion of the first facing surface and the front end of the recessed portion of the second facing surface can securely hold the head of the screw, etc. You can expand the application of water pump pliers by removing the screws and other objects.

In addition, in the present embodiment, in a state where the connecting shaft is locked and the jaw is opened by the locking structure at the position where the opening width of the jaw is the narrowest, the rotation center of the connecting shaft is moved away from the first The front end of the facing surface and the front end of the second facing surface are at equal distances. When clamping the head of the screw, the rotation center of the connecting shaft is usually located on the extension of the shaft of the screw to be clamped. The front end of the first jaw portion 1011, the front end of the second jaw portion 1021, and the like can also be aligned intuitively when grasping a screw or the like with reference to the position of the connecting shaft to improve operability. Thereby, the applicable use of a water pump clamp can be expanded.

In addition, the distance from the center of rotation of the connecting shaft to the front end of the concave portion of the first facing surface can be made the same as the distance from the center of rotation of the connecting shaft to the front end of the concave portion of the second facing surface, and the first handle portion can be held. For the second handle portion, the moving distance of the front end of the recessed portion 21 of the first facing surface 20 and the recessed portion of the second facing surface 30 where the first jaw portion 1011 and the second jaw portion 1021 move around the rotation center of the connecting shaft The moving distance of the front end of the 31 is the same, so that it is easy to perform alignment when the head of the screw is clamped, which improves the operability. This makes it possible to expand the use of water pump pliers that can be used appropriately.

Moreover, in the above-mentioned embodiment, although the case where the 1st arm 101 and the 2nd arm 102 were rotatably connected by the connection shaft 103 was demonstrated, in this invention, if the 1st arm 101 and the 2nd arm 102 The first arm 101 and the second arm 102 may be rotatably connected, and may be connected by a connection portion of any structure.

In addition, in the above-mentioned embodiment, although the water pump pliers 1 are lifted, in order to move the connecting shaft 103 in the sliding hole 1013, the locking structure 104 locks the connecting shaft 103 at two or more different positions of the sliding hole 1013. The case of a water pump plier that can adjust the opening width between the first jaw portion 1011 and the second jaw portion 1021 has been described as an example, but if the present invention has a connecting portion and a locking structure, the first Water pump pliers with an opening width between the jaw portion 1011 and the second jaw portion 1021 are applicable. The connection portion is inserted through a hole provided in the first arm 101 and rotatably connects the first arm 101 and the second arm 102. The locking structure is used to lock the connecting portion at two or more different positions of the hole provided on the first arm to adjust the opening width between the jaws. For example, the water pump pliers 1 of the present invention may be a water pump pliers having a locking structure including a plurality of holes provided in the first arm 101 and a connection portion that can be drawn out and inserted into the plurality of holes, instead of having The slide hole 1013 and the connecting shaft 103 are as described above.

Moreover, in the said embodiment, although the case where the 1st opposing surface 20 and the 2nd opposing surface 30 were provided with the recessed part extended from the front-end | tip of the 1st jaw part 1011 and the 2nd jaw part 1021 was demonstrated. However, in the present invention, such a recessed portion may not be provided. Even in this case, as described above, when the front end of the first jaw portion 1011 and the front end of the second jaw portion 1021 of the second arm 102 are used to grasp the screw, In the first class, the same effects as described above can be obtained. However, in order to securely grasp the head of the screw, it is preferable to provide a recess as described above.

The present invention is not limited to the above embodiments, and various changes can be made. Of course, such changes are also included in the scope of the present invention.

(Industrial availability)

As described above, the water pump pliers and the like of the present invention are useful as water pump pliers and the like that can hold the head of a screw and the like.

Claims (10)

A water pump pliers includes a first arm and a second arm, each of which has a jaw portion at a first end portion and a handle portion at a side of the second end portion; and a connecting portion is inserted through the first arm. And a locking structure for connecting the aforementioned first arm and the second arm in a rotatable manner; and a locking structure for holding the connecting portion in two or more of the holes. Locking at different positions to adjust the width of the opening between the jaws; wherein the front end of the jaw of the first arm and the front end of the jaw of the second arm are provided with a first facing surface and a second facing surface, and the card is used The structure is fixed at a position where the opening width of the jaw is the narrowest, so that the coupling portion is locked, and the rotation center of the coupling portion is located on a surface at an equal distance from the first facing surface and the second facing surface. The water pump pliers according to item 1 of the patent application scope, wherein the first facing surface and the second facing surface have recesses, and the recesses are provided with ridges extending from the front ends of the jaws. The water pump pliers according to item 2 of the scope of patent application, wherein at least the front end side of the ridges of the concave portion of the jaw portion of the first arm and the concave portion of the jaw portion of the second arm are respectively attached to the closed jaw portion. In this state, the ridges are gradually inclined away from each other as they leave the front end of the jaw. The water pump pliers according to item 1 of the patent application scope, wherein a wrench-shaped portion is provided on a second end portion side of at least one of the first arm or the second arm, and the wrench-shaped portion is provided with the first arm or the second arm. A cross section perpendicular to the direction in which the second arm extends is a regular n-angle (n is an integer of 3 or more), and the thickness is a shape that decreases continuously toward the front end of the second end portion. The water pump pliers according to item 1 of the scope of patent application, wherein a screwdriver-shaped portion is provided on a second end side of at least one of the first arm or the second arm, and the screwdriver-shaped portion has a width of less than a threshold value. Zigzag screwdriver shape. The water pump pliers according to item 1 of the scope of patent application, further comprising: a cover member detachably mounted on a handle portion of at least one of the first arm and the second arm; the cover member has a length extending The opening portion in the direction, the opening portion reaches at least one end portion, and the cross section perpendicular to the longitudinal direction of the opening portion is C-shaped, and the first arm and the first arm of the handle portion of the arm of the cover member are inserted into the An inserting portion is provided on the side opposite to the side where the two arms face each other, and the inserting portion has a cover member that can slide through the opening portion by sliding the cover member from the end portion side of the arm opposite to the handle portion toward the handle portion. A shape that is embedded in the C-shaped interior of the cover member. The water pump pliers according to item 6 of the scope of patent application, wherein a portion that becomes a root portion of the embedding portion of the handle portion has a shape in which the cover member is inserted into the opening portion of the cover member while being inserted into the cover member. . The water pump pliers according to item 6 of the scope of patent application, wherein each of the cover members is mounted on the arm, has a locking surface at a portion on the side of the second end portion, and the cover members are mounted thereon. A cover locking portion is further provided on the second end portion side of the arm, and the cover locking portion is locked with a locking surface of the cover member to prevent the cover member from moving toward the second end portion side. According to the water pump pliers described in item 6 of the patent application scope, the handle portion to which the cover member is attached is in a state where the cover member is removed, and the exposed portion has a non-slip shape. A cover member is used for the water pump pliers described in item 6 of the patent application scope.