JPH0288181A - Opening-end ratchet wrench - Google Patents

Abstract

PURPOSE: To allow use in a spatially restricted place by sealing a workpiece from an external contaminant, facilitating the release of a previous workpiece in gripping a following workpiece, and receiving a workpiece with a jaw closed. CONSTITUTION: When a handle 10 is moved counterclockwise before fastening a workpiece 30, a small jaw 14 is driven around a pin 17 while allowed by a cam face 10b until the jaw secures a sufficient clearance for gripping another workpiece around the workpiece 30. If the jaw is positioned in a completely closing position, an action for expanding a clearance between a large jaw 12 and the small jaw 14 is not required when a wrench approaches the side part of the workpiece 30, which is positioned across a flat part or positioned in an optional position matching with a notch part of the wrench to the workpiece top point, from its end part, so that the wrench can be directly slid along the workpiece 30. That is, the jaw 14 is stopped with a clearance proper for receiving the workpiece 30 when it is closed. In addition, the teeth of the jaw assist release of the workpiece 30 by means of a ratchet mechanism, and consequently smooth releasing action can be performed more rapidly.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an improved open end ratchet wrench.

[Prior Art and Problems to be Solved by the Invention] As is well known, there is a demand for ratchet wrenches that serve many purposes as tools in a wide range of industrial fields. In addition to the commonly known box wrenches, more complex tools are provided by ratchet wrenches with open ends of the single-ended or double-ended type. This tool is used, for example, for tightening or loosening bolts or the like in places where space is limited.

[Means for Solving the Problems] Although various open-end ratchet wrenches have been described, the present invention improves these and provides the following important features. This means, for example, that a stop/toggle mechanism is effectively sealed to prevent exposure to external contaminants, and that standard The shape of the conventional box wrench has been modified to form a special tool, and when the jaws are in a completely closed position, that is, the workpiece can be received into the jaws without opening the jaws. This is what I did. This last feature is due to the provision of a heavy-duty stopper that limits the closing of the jaws, and the stubby mechanism so that it does not wrap around the workpiece when intersecting the flat part of the workpiece. This was realized by the feature that the structure could be closed step by step in 30' increments, which was not possible with the previous structure.

What has been described above are examples of the features of the invention, which may be better understood by reading the following detailed description in conjunction with the accompanying drawings.

[Examples] In order to better understand the basic idea of the present invention, examples illustrated in the drawings will be specifically described below. However, these descriptions do not limit the scope of the present invention, and modifications and applications of the described apparatus will be obvious to those skilled in the technical field to which the present invention pertains, and these also fall within the scope of the present invention. It is within the scope of the invention.

Referring to the accompanying drawings, an open end ratchet wrench according to the present invention includes a handle 10, a large jaw 12, a small jaw 14 (large jaws = 1-12 and small jaws = +-
14 includes bins 17 and 19 (for selective engagement with workpiece 30), and (in the preferred embodiment) a spring member 20. The above components are located close to both ends of the wrench, making it suitable for use as a double-ended wrench (see FIGS. 4 and 5).

The small jig g 14 acts between the sides 12a of the large jaw 12 with the pin 17 as the center (see Figs. 4 and 5). The handle 10 is provided with a cam 10a at one end, which can pivot about the bin 19 up to the large gee 1-12, and which engages a cam surface 10b and a cam stop 10c of the handle. provide. Furthermore, as is clear from FIGS. 2 and 3, the cam surface 10b is
The pin 17 engages with the corresponding surface of the small jaw 14, ie, the corresponding cam surface 14a, along a generally straight line between the pins 17 and the pins 19. As a result of the linear engagement of the cams 10b and 14a, during use, that is, when the handle 1o is moved clockwise or in the direction of tightening the workpiece, as shown in FIGS. 3 and 5. , capable of transmitting the maximum amount of force. Before tightening the workpiece 30 further,
When the handle lO is moved in the opposite direction, ie, counterclockwise (see Figure 2), the small jaw 14 is moved against the cam until the jaw has sufficient clearance around the workpiece 3o to grip another workpiece. As surface 10b allows, pin 17
Pivot around.

To loosen the workpiece 30, the wrench is reversed 180' and the above procedure is reversed.

When in the fully closed position, i.e. before the wrench is used, it is important that the wrench crosses a flat or at any position corresponding to the notch of the wrench relative to the top of the workpiece. When approaching the side of the workpiece from the end of the workpiece, there is no need to widen the gap between the large jaw 12 and the small jaw 14, and the wrench can be slid directly along the workpiece 30. Once closed, the small jaws 14 are stopped at a suitable spacing to receive the workpiece 30. In this position, the small jaw 14 is in contact with both sides of the large jaw 12 at the point 12b (
(See Figure 5). This desirable feature of rapid access to the workpiece has not been possible with conventional 30' step-close wrenches. The only conventional wrench that can be applied without widening the jaws moves in a ratcheting motion and cannot grip a different workpiece every 30 degrees.

As mentioned above, the large jaw 12 and the small jaw 14 are
An open end wrench is configured and provides box wrench type teeth. However, the shapes and dimensions shown may be slightly modified. Additionally, these teeth assist the ratchet mechanism in releasing the workpiece 30, resulting in a faster and smoother release action.・′
Boosting action to resist the 2-yaw spread is provided by two levers. The first lever moves the pin 17 of the small jee 1-14, which is a pivot point, close to the outer end of the jaw 14 and near the workpiece (but the small jee 1-14 is
This is provided by positioning it at a position away from the point 14a that contacts the handle 10 at point b. The preferred location for pin 17 is on a line extending to the center of the fully inverted workpiece. This line forms an angle of approximately 60° with a second line extending from the center of the workpiece and passing through the deepest notch in the throat of the jaw formed by the small jaw adjacent to the large jaw. . The second leverage is provided by positioning the pivot point, pin 19 of the handle 10, closer to the cam location 10b than the other end of the wrench to which the handle is attached. A preferred location for pin 19 is generally on said second line extending from the center of the workpiece through the deepest notch formed by the jaws. In other words, the pivot point (17, 19
) and the center point of the workpiece, a triangular relationship is formed.

The spring member 20 shown in FIGS. 1, 2, and 4 typically has an rTJ-shaped planar shape, and its side arm 20a is formed on the side of the large jaw 12. It is fixed within the notch 12a'.

The middle portion 20b of the spring member 20 is connected to the side portion 1 of the large jaw.
It is positioned between portions 12a' along the outer edge of 2a. In either case, the end of the spring member 20 lies within the "flat" 10d at the top of the handle IO (as shown) and advances the small jaw 14 to the closed position.

As mentioned above, the handle cam stopper 10 of the cam loa
c serves to engage the large jaws 1-12 while preventing the small jaws 14 from opening more than necessary to release the workpiece 30 (see FIG. 1). This latter mechanism for limiting the extent to which the small jaws are opened also serves to prevent the spring member from becoming unduly stressed when the handle 10 is moved to the released position.

In any case, it will be clear from the above description that the open end wrench of the present invention is effective when used in continuous movement to tighten or loosen a workpiece. As mentioned above, the invention is particularly suited for use in situations where space accessibility is limited. In such a case, for example, the wrench can be positioned directly around the workpiece from the side or end of the wrench without bending the jaws in most access positions. Furthermore, the jaw-type head of the wrench, which can be actuated via a cam formed on one end of the handle, is easily adapted to a double-ended wrench configuration, as illustrated in FIGS. 4 and 5. I can do it. Spring member 2
Although it is desirable to incorporate the spring member 0 into the finished wrench, it is possible to provide useful wrench functions without such a spring member.

The open-ended wrench described above can be modified in many ways within the spirit of the invention. For example, depending on the shape of the final workpiece or related factors, the exact shape of the cam surface, whether or not to use the spring member 20, the arrangement of teeth, etc. that cooperate with the small and large jaws may be changed. , the large jaw is
For convenience of manufacturing, it is possible to employ various manufacturing methods, such as forming one or more members. Therefore, the above description is merely for showing one example of the present invention, and the scope of the present invention is not limited only to this example.

[Brief explanation of the drawing]

FIG. 1 shows a side view of an open-end ratchet wrench according to the invention in a typical open position; FIG. 2 is a partial comparison with FIG. Another side view of the open-end ratchet wrench shown in top view, FIG. 3, in one of two possible positions, i.e. in the top or across the flats, then in use surrounding a workpiece. Another more detailed side view with a partial section of the wrench (the wrench can be accessed in both positions from the end of the workpiece without widening the jaws, and the flats can be accessed from the side) FIG. 4 is a plan view of the open-end wrench of the present invention seen from above FIG. 5, and FIG. 5 is a side view of the double-eyed open-end wrench of the present invention. lO: Handle 10a: Cam lQb: Cam surface 10c: Cam stop collar 12: Large jaw 14: Small jaw 17.19: Pin 20: Spring member 30: Work

Claims (1)

Claims: 1. An open-end ratchet wrench comprising: a handle having a cam disposed at one end; and a large jaw pivotally mounted adjacent to the cam of the handle; a small jaw pivotally mounted on the large jaw; and a cam surface on the small jaw that cooperates with the cam of the handle in one working position of the wrench. An open end ratchet wrench characterized by comprising: 2. The open end ratchet wrench of claim 1, wherein the cam of the handle includes a cam surface cooperating in a locked state with a surface of the large jaw. 3. The open-end ratchet wrench according to claim 1, wherein the large jaw and the small jaw directly receive a workpiece therebetween without moving themselves. 4. The open end wrench according to claim 1, wherein a spring member presses against the large jaw. 5. In said one operative position, said large jaw and said small jaw, their respective pivotable mounting portions, said cam surface on said small jaw, and said cam surface of said cam of said handle are arranged in a generally straight line. The open end ratchet wrench according to claim 1, characterized in that: 6. The open end ratchet wrench according to claim 2, wherein when the large and small jaws are in the maximum open state, the cam of the handle and the cam surface of the large jaw are in the stopped state. . 7. The cam of the handle and the cam surface of the large jaw limit the distortion of the spring member that presses against the large jaw to within the degree when the large and small jaws are in the maximum open state. The open end ratchet wrench according to claim 2. 8. The open end ratchet wrench according to claim 4, wherein the spring member performs both a closing function and a sealing function to prevent contamination by foreign objects. 9. A stopper between the small jaw and the large jaw,
The open-ended ratchet wrench of claim 1, characterized in that it limits the closed spacing for the purpose of receiving a workpiece. 10. The large jaw, the small jaw, and the cam of the handle are disposed close to each end of the wrench, so that the wrench can be selectively used as a double-ended wrench. The open end ratchet wrench described in 1. 11. An open-ended ratchet wrench capable of rotating a hexagonal workpiece, comprising an elongated handle and cooperating small and large jaws, each having a notch forming a flat part, From the closed position at any of 12 access angles of 30° equiangular to the end and in any of 6 access angles of 60° equiangular to the side of the workpiece without spreading the small and large jaws. , comprising said small and large jaws having apexes selectively accessible to a flat portion of said hexagonal workpiece, said apex formed on said hexagonal workpiece being inside a throat being formed; wherein the large jaw is pivoted near one end of the elongate handle, the large jaw selectively aligning with a notch and providing a bifurcated side defined by a connection between the small and large jaws; the small jaw is pivotally mounted between the bifurcated sides of the large jaw, and the elongated handle has a cam disposed at the end. and the cam engages with a cam disposed on the small jaw and is disposed approximately on a line connecting the pivot points of the small and large jaws, and the engagement point of the cam is on the small jaw. The pivot point of the large jaw is closer than the pivot point of the jaw, and the pivot point of the small jaw, the pivot point of the large jaw, and the center point of the hexagonal workpiece are closer to each other than the pivot point of the jaw. , an open end ratchet wrench, characterized in that it projects the apex of a triangle, with one maximum angle at the pivot point of the small jaw and the other maximum angle at the center point of the hexagonal workpiece. 12. An open-ended ratchet wrench capable of rotating a hexagonal workpiece, comprising an elongated handle and cooperating small and large jaws, each having a notch forming a flat part, Any of 12 access angles of 30° equiangular to the ends and 6 of 60° equiangular to the sides of the workpiece.
said small and large jaws having apexes that are selectively accessible to a flat portion of said hexagonal workpiece without unfolding said small and large jaws from a closed position at any of two access angles; an apex formed on the hexagonal workpiece selectively aligns with a notch defined by a connection between the small and large jaws inside a formed throat and diverges; the large jaw providing sides is pivotally mounted near one end of the elongate handle, while the small jaw is pivotally mounted between the bifurcated sides of the large jaw. the elongated handle has a cam disposed at the end, the cam engaging a cam disposed on the small jaw and pivoting the small and large jaws; disposed generally on a line connecting the moving points, the engagement point of the cam is closer to the pivot point of the large jaw than the pivot point of the small jaw, and the engaged hexagon of the first notches at the outer ends of the large and small jaws, along a straight line passing through the center of the workpiece, perpendicular to the axis of the hexagonal workpiece, and further passing through each of the first notches. the large and small jaws are each within a respective 120° angle extending from the center of the engaged hexagonal workpiece, and the hexagonal workpiece is positioned adjacent to an obstacle; An open end ratchet wrench, characterized in that the hexagonal workpiece is easily accessible when the hexagonal workpiece is opened. 13. An open-ended ratchet wrench capable of rotating a hexagonal workpiece, comprising: an elongated handle; and cooperating small and large jaws each having a notch forming a flat part; Any of 12 access angles of 30° equiangular to the end and 12 of 60° equiangular to the sides of the workpiece.
the small and large jaws having apexes that are selectively accessible to the flats of the hexagonal workpiece without unfolding the small and large jaws from a closed position at any of the access angles; The apex formed on the hexagonal workpiece is selectively aligned with the notch defined by the connection between the small and large jaws inside the formed throat, and the bifurcated side the large jaw is pivotally mounted near one end of the elongated handle, while the small jaw is pivotally mounted between the bifurcated sides of the large jaw. the elongated handle has a cam disposed at the end, the cam engaging a cam disposed on the small jaw and pivoting the small and large jaws; arranged generally on a line connecting the points, the engagement point of the cam is closer to the pivot point of the large jaw than the pivot point of the small jaw, and the pivot point of the small jaw a point, the large pivot point and the center point of the hexagonal workpiece, one maximum angle is at the pivot point of the small jaw, and the other maximum angle is at the center point of the hexagonal workpiece. , projecting the vertices of a triangle, a spring member pressing against the bifurcated side of the large jaw and the elongated handle to force the small and large jaws toward a closed position. End ratchet wrench. 14. When the hexagonal workpiece and the rotation axes of the small and large jaws are parallel and move in the same direction, the small jaw is pressed against the flat part of the hexagonal workpiece, and the small and large jaws are pressed against the flat part of the hexagonal workpiece. When intersecting opposite vertices of a hexagonal workpiece and enveloping the largest diameter, the small jaw releases from the large jaw from any approach angle against the tension applied by the spring member. The open end ratchet wrench according to claim 13, characterized in that: 15. An open-end ratchet wrench capable of rotating a hexagonal workpiece, comprising an elongated handle and cooperating small and large jaws, each having a notch forming a flat part, From the closed position at any of 12 access angles of 30° equiangular to the end and in any of 6 access angles of 60° equiangular to the side of the workpiece without spreading the small and large jaws. , the small and large jaws having apexes selectively accessible to a flat portion of the hexagonal workpiece, wherein the apex formed on the hexagonal workpiece is inside a formed throat. , the large jaw selectively aligned with a notch defined by a connection between the small and large jaws and providing bifurcated sides is pivotable about one end of the elongated handle. the small jaw is pivotally mounted between the bifurcated sides of the large jaw, and the elongate handle has a cam disposed at the end. , the cam engages with a cam disposed on the small jaw and is disposed approximately on a line connecting the pivot points of the small and large jaws, and the engagement point of the cam is on the small jaw. the pivot point of the large jaw is closer to the pivot point of the large jaw than the pivot point of the large jaw, and a spring member urges the bifurcated side of the large jaw and the elongated handle to in the direction of the closed position, and the cam stopper of the elongated handle is disposed so as to be in a stopped state with the cam of the large jaw when the small and large jaws are in the maximum open state. Features an open end ratchet wrench. 16. An open-ended ratchet wrench capable of rotating a hexagonal workpiece, comprising an elongated handle and cooperating small and large jaws, each having a notch forming a flat part, From the closed position at any of 12 access angles of 30° equiangular to the end and in any of 6 access angles of 60° equiangular to the side of the workpiece without spreading the small and large jaws. , the small and large jaws having apexes selectively accessible to a flat portion of the hexagonal workpiece, wherein the apex formed on the hexagonal workpiece is inside a formed throat. , the large jaw selectively aligned with a notch defined by a connection between the small and large jaws and providing bifurcated sides is pivotable about one end of the elongated handle. the small jaw is pivotally mounted between the bifurcated sides of the large jaw, and the elongate handle has a cam disposed at the end. , the cam engages with a cam disposed on the small jaw and is disposed approximately on a line connecting the pivot points of the small and large jaws, and the engagement point of the cam is on the small jaw. the pivot point of the large jaw is closer to the pivot point of the large jaw than the pivot point of the large jaw, and a spring member urges the bifurcated side of the large jaw and the elongated handle to a cam stopper of the elongated handle is arranged so as to be in a stopped state with the cam of the large jaw when the small and large jaws are in the maximum open state; An open end ratchet wrench, characterized in that a cam stopper of the handle and the cam of the large jaw function to limit distortion of the spring member when the large and small jaws are fully opened. 17. The spring member is positioned over the cam stop of the elongate handle, the cam of the small jaw and the only entrance to the cam of the large jaw in a sealed manner to prevent contamination by foreign objects. The open end ratchet wrench according to claim 15. 18. The thicker portion of the small jaw is in a stopped state with respect to the branched side of the large jaw adjacent to the notch defined by the connecting portion of the small jaw and the large jaw. 12. The open-ended ratchet wrench of claim 11, wherein the small jaw slides between the bifurcated sides of the large jaw until the small jaws slide between the bifurcated sides of the large jaw. 12. The open-end ratchet wrench according to claim 11, wherein the movement of the hexagonal workpiece can be selectively reversed by inverting the hexagonal workpiece by 180 degrees. 20. By ratcheting the elongated handle against the tension of the spring member, the flat portions of each of the small and large jaws slide on the flat portion of the hexagonal workpiece. and the small and large jaws are maintained in an open state until the small and large jaws are closed by a preselected angle on a continuous flat portion of the hexagonal workpiece. The open end ratchet wrench according to claim 13. 21. A small jaw, a large jaw, and a cam of the elongated handle are disposed close to each end of the elongated handle so that the handle can selectively function as a double-ended wrench. The open end ratchet wrench according to claim 11.