JP4187443B2 - Adjustable wrench - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an adjustable wrench (commonly called a monkey wrench) for turning a rotating body such as a bolt head or nut having a polygonal cross-sectional shape.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there are turning tools called wrench, spanner, and the like as tools for turning a rotating body such as a bolt head or nut having a polygonal cross section to tighten or loosen from a tightened state.
[0003]
Such conventional turning tools are roughly classified into a type that fits on a rotating body such as a bolt head and a nut from above, and a type that fits from the side of the rotating body.
[0004]
As a type of turning tool that can be fitted to the rotated body from above, a box wrench, a socket wrench that can be fitted and engaged with the rotated body, and a hole that has a hole for fitting and engaging the rotated body from above A spanner or the like is known, and a spanner having a bifurcated portion that is fitted and engaged with the rotated body from the side is known as a turning tool that can be fitted from the side of the rotated body.
[0005]
Further, the required tightening force differs depending on the tightening part, the tightening member, and the like, and therefore the size of the rotating body such as a bolt and a nut to be used also varies. When using a socket wrench for these parts, each time the size of the engaged portion of the rotated body changes, the socket portion matched to the size of the engaged portion must be replaced, Moreover, in the case of a perforated spanner, a box wrench, a spanner having a bifurcated portion, etc., it must be replaced with one that matches the size of the rotated body, which is very inefficient. Furthermore, when handling products from countries with different standards, the size of the rotated body also differs, so a tool for it must be prepared, and work efficiency is very poor. Therefore, in order to cope with such a change in size, an adjustable wrench that can adjust the engaging portion in a stepless manner according to the size of the rotated body is used.
[0006]
[Problems to be solved by the invention]
However, when the adjustable body is rotated using the adjustable wrench, the upper jaw and the lower jaw sandwiching the rotated body are integrated with the lower jaw approaching and separating from the upper jaw. The distance between the upper jaw and the lower jaw changes due to looseness and / or rattling of the formed slider or the drive mechanism that slides the slider. If the rotating body continues to rotate in this state, the rotating body cannot be loosened or securely tightened, and the corner of the rotating body having the polygonal section may be damaged.
[0007]
Further, in order to reliably engage the rotated body while correcting looseness and / or looseness of the adjustable wrench, the drive mechanism must be adjusted as appropriate, which is very time consuming. , Work efficiency also worsens.
[0008]
Therefore, the present invention fits to the rotated body by expanding or contracting the opening according to the size of the fitted portion of the rotated body from the side to the rotated body such as a bolt head or nut having a polygonal cross section. To provide a convenient adjustable wrench that can be engaged and then tightened or loosened without being frequently adjusted in the position of the lower jaw while securely holding the rotated body. Let it be an issue.
[0009]
It is another object of the present invention to provide an adjustable wrench that can be manufactured in a simple structure with a small number of parts and can be manufactured at a low cost.
[0010]
Another object of the present invention is to provide an easy-to-use adjustable wrench.
[0011]
[Means for Solving the Problems]
  The present invention solves the above problems.Next adjustable wrenchI will provide a.
  Before explaining the adjustable wrench according to the present invention, the following reference example adjustable wrench will also be explained for reference.
(1)Reference exampleAdjustable wrench
  Reference exampleAdjustable wrench
  A handle,
  An upper jaw portion integrally provided with the handle portion at one end of the handle portion;
  A lower jaw portion for engaging and fitting the rotated body with a polygonal cross section such as a bolt head and a nut between the upper jaw portion and the upper jaw portion,
  A slider that is formed integrally with the lower jaw, and is slidably provided at an end where the upper jaw of the handle portion is continuously provided so that the lower jaw can be moved closer to and away from the upper jaw;
  A drive mechanism for driving the slider so as to move the lower jaw part closer to and away from the upper jaw part;
  A friction brake member that stops sliding of the slider when the slider is not slid on the end of the handle portion by the slider drive mechanism.
[0012]
The drive mechanism of the slider is not limited to this, but typically a worm gear mechanism may be used.
[0013]
Such a friction brake member may be an elastic sheet made of rubber or the like fitted in a compressed state between the slider and the end of the handle portion, or the worm gear when the slider drive mechanism is a worm gear mechanism. An elastic ring made of rubber or the like that is fitted between the worm gear and the adjacent handle portion in the mechanism in a compressed state can be cited, but due to collision of articles from outside or biting of dust In order to suppress damage, a shaft that rotatably supports the worm gear in the worm gear mechanism and an elastic ring made of rubber or the like that is inserted between the worm gear in a state compressed between the two are preferable.
[0014]
Such a friction brake member can prevent the slider, and by extension, the lower jaw portion formed integrally therewith from inadvertently moving.
[0015]
  Reference exampleAccording to the adjustable wrench, the slider driving mechanism is operated to move the lower jaw part to a position away from the upper jaw part, and the rotated body is disposed between the upper jaw part and the lower jaw part. Then, the slider driving mechanism is operated to slide the lower jaw, and the rotated body is sandwiched between the upper jaw and the lower jaw.
[0016]
In this state, the rotated body can be rotated by rotating the handle portion around the rotated body.
[0017]
In addition, when the angle is turned by a predetermined angle, the adjustable wrench is pulled out of the rotated body and held at the original position or substantially the original position, and the rotated body is engaged again between the upper jaw and the lower jaw. Turn the handle.
[0018]
By repeating this, the rotated body can be tightened in the tightened state or loosened from the tightened state.
[0019]
  Reference exampleIn the adjustable wrench, since the friction brake member is attached, the slider, and thus the lower jaw part formed integrally with the slider does not move carelessly. Therefore, it is not necessary to operate the drive mechanism frequently in order to keep the distance between the upper jaw and the lower jaw constant, and the upper jaw and the lower jaw are not sufficiently sandwiching the rotated body having a polygonal cross section. Problems such as breakage of the corners of the rotated body, which are caused by turning the handle in the state, can be easily prevented.
(2)According to the present inventionAdjustable wrench
  According to the present inventionAdjustable wrench
  A handle,
  An upper jaw portion integrally provided with the handle portion at one end of the handle portion;
  A lower jaw portion for engaging and fitting the rotated body with a polygonal cross section such as a bolt head and a nut between the upper jaw portion and the upper jaw portion,
  A slider that slidably supports the lower jaw part, and is slidably provided at an end of the handle part where the upper jaw part is continuously provided so that the lower jaw part can be moved closer to and away from the upper jaw part;
  A drive mechanism for driving the slider so as to move the lower jaw part closer to and away from the upper jaw part;
  A spring that is mounted between the lower jaw and the slider or (and) the handle and applies a biasing force to the lower jaw;
  A friction brake member that stops sliding of the slider when the slider is not slid on the end of the handle portion by the slider drive mechanism.
[0020]
At least one of the end portion of the handle portion and the slider has a flat surface for bringing the lower jaw portion into surface contact,
The upper jaw portion has an inner surface for gripping the rotating body for making surface contact with the side surface of the rotated body, and the slider is a guide portion (for example, a guide portion for guiding the movement of the lower jaw portion on the slider) Guide groove).
[0021]
The lower jaw portion has an inner surface for gripping the rotated body facing the inner surface of the upper jaw portion for making surface contact with the side surface of the rotated body, and the handle portion end and / or the slider. It has a stabilizing contact surface for making surface contact with the flat surface, and further has a pin that slidably engages with the guide portion of the slider.
[0022]
  The lower jaw portion receives a biasing force by the spring, and the stabilizing contact surface comes into surface contact with the handle portion end portion and / or the flat surface of the slider, and the inner side surface for gripping the rotating body is A stable position parallel to the inner surface of the upper jaw for gripping the rotated body, and the pin slides along the guide portion against the spring, so that it floats up from the stable position and surrounds the pin, To widen the upper and lower jaw spacingIt is possible to take a pivoting position that can be pivoted.
[0023]
The drive mechanism of the slider is not limited to this, but typically a worm gear mechanism may be used.
[0024]
Such a friction brake member may be an elastic sheet made of rubber or the like fitted in a compressed state between the slider and the end of the handle portion, or the worm gear when the slider drive mechanism is a worm gear mechanism. An elastic ring made of rubber or the like that is fitted between the worm gear and the adjacent handle portion in the mechanism in a compressed state can be cited, but due to collision of articles from outside or biting of dust In order to suppress damage, a shaft that rotatably supports the worm gear in the worm gear mechanism and an elastic ring made of rubber or the like that is inserted between the worm gear in a state compressed between the two are preferable.
[0025]
Providing such a friction brake member can prevent the slider, and thus the lower jaw portion supported by the slider, from inadvertently moving.
[0026]
When the adjustable wrench is not engaged with the rotated body and is not in use, the lower jaw part receives a biasing force by the spring, so that the stabilizing contact surface of the lower jaw part becomes an end of the handle part. The inner surface for gripping the rotating body and the inner surface for gripping the rotating body of the upper jaw are parallel to the inner surface of the upper jaw for gripping the rotating body.
[0027]
In this state, it is fitted from the side so as to be positioned between the upper jaw and the lower jaw on a rotating body, for example, a hexagonal bolt head or nut. At this time, when the interval between the upper and lower jaws is too wide or too narrow, the slider is moved by the drive mechanism so that the upper and lower jaws can be sandwiched between the upper and lower jaws. Adjust to.
[0028]
In this state, when the handle portion is rotated from the upper jaw side to the lower jaw portion along the arc that can be drawn from the upper jaw portion to the lower jaw portion through the slider with the rotated body as the center, Can be rotated. At this time, the pin of the lower jaw is engaged with the guide portion of the slider, and the stabilizing contact surface of the lower jaw is in surface contact with the handle end and / or the flat surface of the slider. The lower jaw is in an immobile state, whereby the distance between both jaws is maintained constant, and the rotated body can be rotated in this state.
[0029]
If the handle is turned in the opposite direction, the upper and lower jaws will have resistance to the rotating external force if the rotated body is already in a certain tightening state or is being turned in the loosening direction. The part receives a reaction force from the rotated body, and thereby the lower jaw part movable on the slider is lifted from the stable position by sliding the pin along the guide part against the spring, The pivotable position is taken. As a result, the lower jaw part is rotated in the direction of widening the gap between the jaw parts so that the rotated body can be rotated relative to the jaw part between the jaw parts by the reaction force from the rotated object. Thereby, the handle portion can be turned in the opposite direction.
[0030]
When the object to be rotated is placed in a play state between both jaws by the rotation of the handle part in the opposite direction, the lower jaw is again placed in a stable position by the biased force of the spring, and the object to be rotated is rotated. I can grab my body. Here, the driven body can be rotated by driving the handle portion in the rotating body rotating direction as described above.
[0031]
By repeating this, in other words, the rotating body can be tightened or loosened by repeatedly reciprocatingly rotating the handle portion with both jaws fitted to the rotating body.
[0032]
  thisAccording to the present inventionThe adjustable wrench has a polygonal cross-sectional shape such as a bolt head and a nut. The adjustable wrench is fitted to the rotating body by expanding or contracting the opening from the side according to the size of the fitting section of the rotating body. The revolving rotation can be performed with the engaged state tightened.OrIt can be loosened and is convenient.
[0033]
In addition, this adjustable wrench can be manufactured in a simple structure with a small number of parts and can be manufactured at a low cost.
[0034]
Furthermore, it is easy to use because the rotated body can be rotated between predetermined states while being fitted to the rotated body from the side, and the structure is simple and easy to operate.
[0035]
  Also,According to the present inventionSince the adjustable wrench is provided with the friction brake member, the slider, and by extension, the lower jaw part supported by the slider does not move carelessly. Therefore, it is not necessary to operate the drive mechanism frequently in order to keep the distance between the upper jaw and the lower jaw constant, and the upper jaw and the lower jaw are not sufficiently sandwiching the rotated body having a polygonal cross section. Problems such as breakage of the corners of the rotated body, which are caused by turning the handle in the state, can be easily prevented.
[0036]
  in this wayAdjustable wrench according to the present inventionThe side of the rotating body, such as a bolt head or nut having a polygonal cross section, is expanded and contracted from the side according to the size of the fitted portion of the rotated body, and is engaged with the rotated body. After that, it is possible to tighten or loosen the rotating body while holding the rotating body securely without frequently adjusting the slider drive mechanism, so that the rotating body can be easily and quickly tightened. Alternatively, loosening can be performed.
[0037]
DETAILED DESCRIPTION OF THE INVENTION
  Embodiments of the present invention will be described below with reference to the drawings.However, a reference example adjustable wrench will be described for reference before that.
(1)Reference exampleAdjustable wrench
  Figure 1Reference exampleAdjustable wrenchAll ofFIG. 2 is an enlarged plan view of the main part of the wrench, and FIG. 3 is an enlarged side view of the main part of the wrench.
[0038]
An adjustable wrench AW shown in FIGS. 1, 2, and 3 includes a handle portion 1, an upper jaw portion 2 integrally provided with the handle portion 1 at one end portion 11 of the handle portion 1, and the upper jaw portion 2. Then, a rotating body (for example, a nut Rt having a hexagonal cross section) is sandwiched between the upper jaw 2 and a lower jaw 3 for engaging and fitting with the nut Rt, and a lower jaw 3 is formed integrally with the lower jaw 3. The slider 4 is slidably provided so that the lower jaw 3 can be moved closer to and away from the upper jaw 2, and the lower jaw 3 is moved closer to and away from the upper jaw 2. And a drive mechanism 5 for driving the slider 4.
[0039]
The upper jaw portion 2 has an inner surface 21 for gripping a rotating body to make surface contact with the side surface of the nut Rt, and the lower jaw portion 3 has an inner surface of the upper jaw portion 2 to make surface contact with the side surface of the nut Rt. 21 has an inner surface 31 for gripping the rotated body.
[0040]
The drive mechanism 5 of the slider 4 is not limited thereto, but here, a worm gear mechanism 51 including a worm gear 52 and a rack gear 44 meshing with the worm gear 52 is used. The worm gear 52 is rotatably fitted to a shaft 53 supported by the handle end 11, and a part of the worm gear 52 is exposed to the outside through a window at the handle end. The rack gear 44 is formed or fixed to the slider 4. Thus, the rack 44 meshing with the worm gear is sent by the rotation of the worm gear, and thereby the slider 4 and the lower jaw portion 3 formed integrally with the slider 4 are slid.
[0041]
  Reference exampleAccording to the adjustable wrench AW, the slider driving mechanism 5 is operated to move the lower jaw 3 to a position away from the upper jaw 2, and the nut Rt is disposed between the upper jaw 2 and the lower jaw 3. Then, the slider driving mechanism 5 is operated to slide the lower jaw 3, and the upper jaw 2 and the lower jaw 3 sandwich the nut Rt.
[0042]
In this state, the nut Rt can be rotated by turning the handle portion 1 around the nut Rt.
[0043]
Further, when the angle is turned by a predetermined angle, the adjustable wrench AW is pulled out from the nut Rt and held at the original position or substantially the original position, and the nut Rt is engaged again between the upper jaw portion 2 and the lower jaw portion 3. Turn the handle 1.
[0044]
By repeating this, the nut Rt can be tightened to the tightened state or loosened from the tightened state.
[0045]
A groove 531 is formed on the outer periphery of the worm shaft 53. A rubber O-ring 532 is fitted on the groove 531 as a friction brake member, and the O-ring 532 is fitted to both the worm gear 52 and the worm shaft 53 in a compressed state.
[0046]
  The friction between the inner wall of the worm gear 52 and the O-ring 532 and the outer wall of the worm shaft 53 and the O-ring 532 brakes the relative rotation of the worm gear 52 and the worm shaft 53, thereby suppressing inadvertent rotation. it can. As a result, the movement and rattling of the slider 4 and the lower jaw part 3 when the slider 4 is not slid on the handle part end part 11 can be suppressed.
(2)According to the present inventionAdjustable wrench
  Figure 4According to the present inventionFIG. 5 is an overall plan view of an example of an adjustable wrench, FIG. 5 is an enlarged plan view of the main part of the wrench, and FIG. 6 is an enlarged side view of the main part of the wrench.
[0047]
The adjustable wrench AW ′ shown in FIGS. 4, 5 and 6 is substantially the same as the adjustable wrench AW except that the lower jaw 3 ′ is rotatably supported by the slider 4 ′. Are given the same reference numerals.
[0048]
An adjustable wrench AW ′ shown in FIGS. 4, 5, and 6 includes a handle portion 1, an upper jaw portion 2 integrally provided with the handle portion 1 at one end portion 11 of the handle portion 1, and an upper jaw portion 2. A lower jaw portion 3 ′ for engaging and fitting with a nut Rt by sandwiching a rotating body having a polygonal cross section (here, a nut Rt having a hexagonal section) between the upper jaw portion 2 and the lower jaw portion 3. 'And a slider 4' slidably provided at an end 11 where the upper jaw 2 of the handle portion 1 is connected to the upper jaw 2 so that the lower jaw 3 'can be moved closer to and away from the upper jaw 2. And a drive mechanism 5 for driving the slider 4 'so that the lower jaw 3' approaches and separates from the upper jaw 2.
[0049]
The end portion 11 of the handle portion 1 and the slider 4 'have flat surfaces 12 and 41' for bringing the lower jaw portion 3 'into surface contact (see FIG. 6), and the upper jaw portion 2 is in surface contact with the side surface of the nut Rt. The slider 4 'has a biasing force on the guide groove 42' and the lower jaw 3 'for guiding the movement of the lower jaw 3' on the slider 4 '. It has a spring 43 'for imparting.
[0050]
The lower jaw portion 3 'has an inner side surface 31' for gripping the body to be rotated and opposed to the inner side surface 21 of the upper jaw portion 2 so as to come into surface contact with the side surface of the nut Rt. A pin 32 has a stabilizing contact surface 32 'for making surface contact with the surfaces 12, 41', and is slidably engaged with a guide groove 42 'of the slider 4' and pressed by a spring 43 '. 33 '.
[0051]
The lower jaw portion 3 ′ receives a biasing force when the pin 33 ′ is pushed by the spring 43 ′, and the stabilizing contact surface 32 ′ faces the flat end surfaces 12 and 41 ′ of the handle portion end portion 11 and the slider 4 ′. A stable position SP where the inner surface 31 ′ for gripping the rotating body is parallel to the inner surface 21 for gripping the rotating body of the upper jaw 2, and the pin 33 ′ is against the spring 43 ′ against the guide groove 42. By sliding along ′, it is possible to take a rotation position RP that is lifted from the stable position SP and is rotatable around the pin 43 ′ (see FIG. 5).
[0052]
Although the drive mechanism 5 of the slider 4 'is not limited to this, a worm gear mechanism 51 is used here.
[0053]
The worm gear mechanism 51 includes a worm gear 52 and a rack gear 44 ′ that meshes with the worm gear 52.
[0054]
The worm gear 52 is rotatably fitted to a worm shaft 53 supported by the handle portion end portion 11, and a part of the worm gear 52 is exposed to the outside through a window at the handle portion end portion.
[0055]
A groove 531 is formed on the outer periphery of the worm shaft 53. A rubber O-ring 532 is fitted on the groove 531 as a friction brake member, and the O-ring 532 is fitted to both the worm gear 52 and the worm shaft 53 in a compressed state.
[0056]
The friction between the inner wall of the worm gear 52 and the O-ring 532 and the outer wall of the worm shaft 53 and the O-ring 532 brakes the relative rotation of the worm gear 52 and the worm shaft 53, thereby suppressing inadvertent rotation. it can. As a result, the movement and rattling of the slider 4 ′ on the handle portion end 11 when the slider 4 ′ is not slid on the handle portion end 11 can be suppressed.
[0057]
Further, the rack 44 'meshing with the worm gear is sent by the rotation of the worm gear 52, and thereby the slider 4' and the lower jaw portion 3 'supported by the slider 4' are slid.
[0058]
  Next, the hexagonal nut Rt is tightened using an adjustable wrench AW '.Or loosenThe procedure will be described with reference to the drawings.
[0059]
  7A to 7E, tighten the nut Rt using the adjustable wrench AW '.Or loosenShow the procedure.
[0060]
When the adjustable wrench AW ′ is not engaged (not used) with the nut Rt, the pin 33 ′ of the lower jaw 3 ′ is pushed by the spring 43 ′ on the slider 4 ′ to exert a biasing force. As a result, the stabilizing contact surface 32 ′ of the lower jaw 3 ′ comes into surface contact with the flat surfaces 12, 41 ′ provided on the handle portion end 11 and the slider 4 ′ and the inner surface 31 ′ for gripping the rotating body. Takes a stable position SP that is parallel to the inner surface 21 for gripping the rotating body of the upper jaw 2 (see FIGS. 5 and 6). At this time, the relative rotation of the worm gear 52 and the worm shaft 53 is restrained by the O-ring 532, so that the movement and rattling of the lower jaw portion 3 'and the slider 4' on the handle portion end portion 11 are suppressed. The
[0061]
In this state, the nut Rt having a hexagonal cross section is fitted from the side so that it is positioned between the upper jaw 2 and the lower jaw 3 '. At this time, if the distance between the upper and lower jaws is too wide or too narrow, the slider 4 'is moved by the drive mechanism 5 so that the upper and lower jaws are just nuts between the upper jaw 2 and the lower jaw 3'. Rt is adjusted so as to be sandwiched (see FIG. 7A).
[0062]
In this state, the handle 1 is centered on the nut Rt, and the upper jaw 2 side to the lower jaw 3 'side along the arc that can be drawn from the upper jaw 2 to the lower jaw 3' via the slider 4 '( The nut Rt can be rotated by turning in the rotating body turning direction Rd). At this time, the pin 33 ′ of the lower jaw 3 ′ is engaged with the guide groove 42 ′ of the slider 4 ′, and the stabilizing contact surface 32 ′ of the lower jaw 3 ′ is flat on the handle end 11 and the slider 4 ′. Since the surfaces 12 and 41 ′ are in surface contact with each other, and the movement of the lower jaw 3 ′ and the slider 4 ′ on the handle end 11 is suppressed by the O-ring 532, the lower jaw 3 ′ is stationary. Thus, the distance between the upper jaw 2 and the lower jaw 3 ′ is maintained constant, and the nut Rt can be rotated (see FIG. 7B).
[0063]
  If the handle portion 1 is turned in the direction Ud opposite to the above, if the nut Rt is already in a certain tightening state or is being turned in the loosening direction, there is resistance to the rotating external force. The part 2 and the lower jaw part 3 'receive a reaction force from the nut Rt, so that the lower jaw part 3' movable on the slider 4 'guides the pin 33' against the spring 43 'on the slider 4'. By sliding along the groove 42 ′, it floats from the stable position SP (see FIG. 7C), and further takes a rotatable position RP (see FIG. 7D). At this time, since the slider 4 'is restrained from moving on the handle end portion 11 by the O-ring 532, even if the lower jaw 3' receives a reaction force from the nut Rt, the slider 4 ' Is further restrained from moving. . As a result, the lower jaw 3 'can be rotated relative to the jaws 2 and 3' between the upper jaw 2 and the lower jaw 3 'by the reaction force from the nut Rt.Gap between both jawsIt rotates in the direction of spreading. Thereby, the handle part 1 can be rotated in the opposite direction Ud.
[0064]
When the nut Rt is placed in a play state between the jaw portions 2 and 3 ′ by the rotation of the handle portion 1 in the opposite direction Ud, the lower jaw portion 3 ′ is again moved by the biasing force of the spring 43 ′. It is arrange | positioned in the stable position SP and can hold | grip nut Rt. Here, the nut Rt can be turned by driving the handle portion 1 in the rotating body turning direction Rd as described above (see FIG. 7E).
[0065]
By repeating this, in other words, the nut Rt can be tightened or loosened by repeatedly reciprocatingly rotating the handle portion 1 with both jaws 2 and 3 'fitted to the nut Rt.
[0066]
  AboveReference Example Adjustable Wrench AW and Adjustable Wrench Example AW ′ According to the Present InventionThe O-ring 532 fitted to the worm shaft 53 is used to suppress the rotation of the worm gear 52, but is not limited thereto, and is compressed between the worm gear 52 and the handle 1. The one that can suppress the rotation of the worm gear 52 such as an elastic ring fitted in the state, or the slider 4, 4 such as an elastic sheet fitted in a compressed state between the slider 4, 4 'and the handle end portion 11. Those that can suppress the sliding of ′ can be widely adopted.
[0067]
In the above example, the nut Rt having a hexagonal cross section is illustrated as the rotated body. However, the nut Rt is not limited thereto, and can be tightened by externally fitting a tool such as a bolt head or nut having a polygonal cross section and turning. Anything can be used.
[0068]
In this example, the worm gear mechanism 51 is employed as the drive mechanism 5 for sliding the sliders 4 and 4 ′. However, the drive mechanism 5 is not limited thereto, and the sliders 4 and 4 ′ can be slid. Those having a mechanism in which the sliders 4 and 4 'do not slide unless the slider 5 is operated can be widely used.
[0069]
【The invention's effect】
According to the present invention, a rotating body such as a bolt head or a nut having a polygonal cross section is fitted to the rotated body by expanding or contracting the opening from the side according to the size of the fitted portion of the rotated body. Provided is a convenient adjustable wrench that can be engaged and thereafter tightened or loosened without being frequently adjusted in the position of the lower jaw, while securely holding the rotated body. it can.
[0070]
Further, according to the present invention, it is possible to provide an adjustable wrench that can be manufactured in a simple structure with a small number of parts and can be manufactured at a low cost.
[0071]
Furthermore, according to the present invention, an easy-to-use adjustable wrench can be provided.
[Brief description of the drawings]
[Figure 1]Reference exampleIt is a whole top view of an example of an adjustable wrench.
FIG. 2 is an enlarged plan view of a main part of the adjustable wrench shown in FIG.
FIG. 3 is an enlarged side view of a main part of the adjustable wrench shown in FIG.
FIG. 4 is an overall plan view of an example of an adjustable wrench according to the present invention.
5 is an enlarged plan view of a main part of the adjustable wrench shown in FIG.
6 is an enlarged side view of the main part of the adjustable wrench shown in FIG. 4. FIG.
7A is a schematic view showing a state in which the adjustable wrench shown in FIG. 4 is engaged with and fitted to the rotated body, and FIG. 7B is a view showing the state in which the adjustable wrench is rotated in the state shown in FIG. FIG. (C) is a schematic diagram when the adjustable wrench starts to rotate in the direction opposite to the rotating direction from the state of FIG. (B). D) The lower jaw isRotation positionFIG. 8E is a schematic view showing a state where the adjustable wrench is engaged and fitted to the rotated body again.
[Explanation of symbols]
AW, AW 'Adjustable wrench
1 Handle part
11 Handle end
2 Maxilla
21 Inner side for gripping the rotating object
3, 3 'lower jaw
31, 31 'Inner surface for gripping the rotating body
32 'Stabilized contact surface
33 'pin
4, 4 'slider
41 'flat surface
42 'guide groove
43 'Spring
44, 44 'rack
5 Drive mechanism
51 Worm gear mechanism
52 Worm gear
53 Worm shaft
531 Groove
532 O-ring
Rt rotating body (nut)

Claims (3)

A handle,
An upper jaw portion integrally provided with the handle portion at one end of the handle portion;
A lower jaw portion for engaging and fitting the rotated body with a polygonal cross section such as a bolt head and a nut between the upper jaw portion and the upper jaw portion,
A slider that movably supports the lower jaw, and is slidably provided at an end of the handle portion where the upper jaw is connected, so that the lower jaw can be moved closer to and away from the upper jaw;
A drive mechanism for driving the slider so as to move the lower jaw part closer to and away from the upper jaw part;
A spring that is mounted between the lower jaw and the slider or (and) the handle and applies a biasing force to the lower jaw;
At least one of the end portion of the handle portion and the slider has a flat surface for bringing the lower jaw portion into surface contact,
The upper jaw portion has an inner side surface for gripping the rotating body for surface contact with the side surface of the rotating body,
The slider has a guide part for guiding the movement of the lower jaw part on the slider,
The lower jaw portion has an inner surface for gripping the rotated body facing the inner surface of the upper jaw portion for making surface contact with the side surface of the rotated body, and the handle portion end and / or the slider. Having a stabilizing contact surface for surface contact with the flat surface, and further having a pin slidably engaged with the guide portion of the slider;
The lower jaw portion receives a biasing force by the spring, and the stabilizing contact surface comes into surface contact with the handle portion end portion and / or the flat surface of the slider, and the inner side surface for gripping the rotating body is A stable position parallel to the inner surface of the upper jaw for gripping the rotated body, and the pin is lifted from the stable position by sliding along the guide portion against the spring, around the pin, The rotation position can be taken to widen the upper and lower jaw interval,
Further, when the slider at the slider driving mechanism in the state that has not been slid over the end of the handle portion, characterized in that it comprises a friction brake member to stop sliding of the slider Adjustable wrench. 2. The adjustable wrench according to claim 1, wherein the slider drive mechanism is a worm gear mechanism . The drive mechanism of the slider is a worm gear mechanism, and the friction brake member is an elastic ring inserted between the worm gear and a shaft that rotatably supports the worm gear in a compressed state between the worm gear and the worm gear mechanism. The adjustable wrench according to claim 2 .

Images