JP2001347465A - Ratchet type fastening tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ratchet type fastening tool capable of easily temporarily fastening without reversely rotating a fastener. SOLUTION: This ratchet wrench 100 comprising a handle 101 as a grip part, a socket part 103 as an engagement part to be engaged with the fastener, and a ratchet part 102, further has a knob member 106 for transmitting the torque to the socket part 103 in a condition that the handle 101 is fixedly gripped without rotated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a grip portion gripped by an operator, an engaging portion for engaging a fastener such as a bolt, and a ratchet mechanism for restricting the rotation direction of the engaging portion. It relates to a ratchet type fastening tool.

[0002]

2. Description of the Related Art Conventionally, a ratchet wrench, a ratchet type socket wrench (hereinafter simply referred to as a socket wrench), and the like are known as this type of ratchet type tightening tool.

FIG. 6 is a plan view showing an example of a conventional ratchet wrench. In FIG. 6, the ratchet wrench 1
Reference numeral 00 includes a handle 101 serving as a grip portion, and two ratchet portions 102 provided at both ends of the handle 101. The ratchet portion 102 rotatably supports a socket portion 103 as an engaging portion, and a plurality of edges that mesh with fasteners such as nuts are formed on the inner peripheral surface of the through hole of the socket portion 103. Also,
A direction switching lever 1 is provided on the outer peripheral surface of the socket portion 103.
A ratchet (not shown) that meshes with the end of the head 04 is provided. The direction switching lever 104, which can swing in the direction of the arrow in the drawing, restricts the rotation direction of the socket portion 103 to only one direction, and changes the meshing direction with the ratchet depending on the swing position. By doing so, the rotation restriction direction is changed. In the ratchet wrench 100 having such a configuration, the operator operates the ratchet portion 10
The socket portion 103 engaged with a nut or the like simply by reciprocating the handle 101 at an arbitrary angle about the axis 2.
Can be rotated only in the tightening direction or the loosening direction.

FIG. 7 is a perspective view showing an example of a conventional socket wrench. In FIG. 7, a socket wrench 200
Has a ratchet handle 201 provided with a ratchet portion 202 at one end, and a socket 203 as an engaging portion. The ratchet portion 202 rotatably supports the insertion angle 205, and the rotation direction of the insertion angle 205 is regulated by a direction switching knob 204. When the insertion angle 205 of the ratchet part 202 is inserted into the insertion port 203a, the socket 203
02 is rotatably held. Also, a socket hole 203b provided on the side opposite to the insertion port 203a.
With a fastener such as a nut. In the socket wrench 200 having such a configuration as well, the operator simply rotates the ratchet handle 201 reciprocally around the ratchet portion 202 at an arbitrary angle, and moves the socket 203 engaged with the fastener in the tightening direction or the loosening direction. Can only be rotated.

[0005] The socket wrench 200 shown in FIG.
As shown in FIG. 7, there is also a case where it is used in combination with an extension bar 206 for connecting the socket 203 and the insertion angle 205.

[0006]

In both the ratchet wrench and the socket wrench, it is necessary to largely move the arm having the handle in order to tighten a fastener such as a nut. At the time of the temporary tightening operation, the fastener must be rotated many times, and if such an operation of the arm is repeated many times, the working efficiency deteriorates. In addition, since the screwing force of a fastener such as a nut at the time of temporary tightening is extremely weak, if the handle rotates in a direction opposite to the tightening direction, the fastener also reversely rotates before the ratchet mechanism functions. At the time of temporary fastening, it is necessary to rotate the handle in one direction instead of reciprocating rotation in order to avoid such reverse rotation, which further deteriorates the work efficiency of temporary fastening. For these reasons, in temporary fastening of the fastener, it is common to rotate the fastener only with a fingertip without using a ratchet wrench or a socket wrench.

However, the shape of a fastener such as a nut is limited to a hexagon or the like that enables engagement with a tool.
Since the fingertip does not completely fit, the rotation operation with the fingertip is not always easy. In particular, a relatively small-diameter nut has a hexagonal edge portion that is less likely to be caught on a fingertip than a large-diameter nut, making it difficult to rotate with a fingertip.

The present invention has been made in view of the above background, and an object of the present invention is to provide a ratchet-type tightening tool that can easily be temporarily tightened without reversely rotating a fastener. It is.

[0009]

In order to achieve the above-mentioned object, the invention according to claim 1 is characterized in that a grip portion gripped by an operator;
An engaging portion that engages with a fastener such as a bolt, and a ratchet portion that regulates the rotation direction of the engaging portion are provided, and a reciprocating rotational force around the ratchet portion is applied to the grip portion. A ratchet-type fastening tool for rotating the engaging portion in a predetermined direction to tighten the fastener, in order to transmit a rotational force to the engaging portion in a state where the gripping portion is fixedly held without rotating the gripping portion. Is provided.

According to a second aspect of the present invention, there is provided the ratchet type fastening tool according to the first aspect, wherein the engaging portion for engaging a regular polygonal column-shaped fastener with the through hole, the gripping portion, A tool body having a ratchet mechanism and a polygonal wrench in the shape of a regular polygonal column engaged with the through hole are provided.

According to a third aspect of the present invention, in the ratchet type tightening tool of the second aspect, an insertion angle which can be inserted into an insertion port of a socket used for a socket wrench is provided at an end of the polygon wrench. It is characterized by having.

According to a fourth aspect of the present invention, in the ratchet type tightening tool of the second aspect, one end of the polygonal wrench is
It is characterized in that it is formed in a spherical shape having the same edge as the polygonal wrench main body.

In these ratchet type fastening tools, an operator engages an engaging portion such as a socket with a fastener,
By repeatedly rotating the knob member only in the tightening direction with the other hand in a state where the grip portion is fixedly gripped with one hand, it is possible to easily temporarily tighten the fastener without reverse rotation. it can.

In particular, in the ratchet type tightening tool of the second aspect, the engaging portion has a through hole like a conventional ratchet wrench, and the through hole is formed into a regular polygonal column-like tightening tool such as a hexagon nut. Tool. Therefore, temporary fastening can be easily performed without rotating the regular polygonal column-shaped fastener in the reverse direction. Further, this ratchet type fastening tool includes a polygon wrench such as a hexagon wrench which engages with the through hole, separately from the tool body. In the ratchet-type fastening tool having such a configuration, the operator inserted one end of the polygon wrench penetrating the through hole of the tool body into a polygonal hole such as a hexagonal hole provided at the top of the cap screw bolt. Thereafter, by repeatedly rotating the knob member of the tool body only in the tightening direction, temporary tightening can be easily performed without reversely rotating the cap screw bolt.

In particular, in the ratchet type fastening tool according to the third aspect, the polygonal wrench having an insertion angle at an end functions as an extension bar for connecting a socket used for a socket wrench to a tool body. . Specifically, the wrench part of the regular polygonal prism of the polygon wrench is passed through the through hole of the tool body, and the insertion angle provided at the end of the wrench part is inserted into the insertion port of the socket. Thus, the socket and the tool main body are connected.
In the polygon wrench having such a configuration, unlike the conventional extension bar 206 in which the connection position with the tool main body (ratchet handle 201) is located only at the end as shown in FIG. The entire area in the longitudinal direction of the polygonal column is the connection position with the tool main body. Therefore, the operator, after penetrating the polygon wrench through the through hole of the tool body, slides the tool body along the longitudinal direction of the polygon wrench, at an arbitrary length position of the polygon wrench. The tool body can be rotated.

In the ratchet type tightening tool according to the fourth aspect, among the two ends of the polygonal wrench, the spherical end having the same edge as that of the wrench body has a polygonal hole in the fastener (for example, a cap screw). Even if it is inserted into the hexagonal hole of the bolt with some inclination, the fastener can be tightened by engaging the end with the polygonal hole.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a ratchet wrench which is a ratchet type tightening tool will be described below. FIG. 1 is an exploded perspective view showing a ratchet wrench according to the present embodiment. In FIG. 1, the ratchet wrench 100 includes a ratchet portion 102 at one end of a rod-shaped handle 101 which is a grip portion. A small groove 10 is formed on the peripheral surface on the other end side of the handle 101 made of a steel material such as iron or stainless steel so that an operator can easily grasp the handle.
5 are formed innumerably. The ratchet portion 102 rotatably supports a drum-shaped socket portion 103 serving as an engagement portion. The socket portion 103 has a hexagonal hole as a through hole that is engaged with a hexagonal bolt or a hexagonal nut. I have. A ratchet 103 a is formed on the outer peripheral surface of the socket portion 103 so as to mesh with the tip of the direction switching lever 104. Further, one end of the socket 103 is provided with a gear-shaped knob member 10.
6 is fixed. A through hole is formed in the center of the knob member 106, and the knob member 106 is fixed to the end of the socket 103 so that the center of the through hole is aligned with the center of the hexagonal hole of the socket 103. .

FIG. 2A is a side view showing the ratchet portion 102 detached from the handle 101, and FIG. 2B is a plan view of the ratchet portion 102 of FIG. It is. However, in FIG. 2B, illustration of the knob member 106 is omitted for convenience. In these figures, the main body portion of the socket 103 and the ratchet wheel 103a are formed integrally, and the diameter of the ratchet wheel 103a is larger than the diameter of the main body portion. The ratchet portion of the handle 101 shown in FIG.
A notch is formed so that the socket 1
The ratchet wheel 103a having a diameter larger than that of the main body portion 03 is sandwiched by the metal on both sides of the notch.

The direction switching lever 104 disposed on the right side of the socket portion 103 in the figure includes a crescent-shaped lever member 104a, a shaft pin 104b serving as a swing shaft thereof, and a lever member 104a. And a spring member 104c for urging the spring member 104c. In FIG. 2B, the lever member 104a is moved by the operator to the shaft pin 10.
4b, but if it is once swung in either direction (upward or downward in the figure), it is urged by the spring member 104c, so that the upper or lower side in the figure The tip part is the ratchet wheel 10 of the socket part 103.
It stops in a state where it abuts on 3a. FIG. 2B shows a state in which the upper end portion in the figure is in contact with the ratchet wheel 103a. When the socket 103 is rotated clockwise in the drawing in this state, the tip of the lever member 104a is caught on the side surface of the hook of the ratchet wheel 103a, so that the clockwise rotation of the socket 103 is prevented. However, when the socket 103 is rotated counterclockwise in the drawing, the tip of the lever member 104a is only hit by the pawl and does not catch on the side of the pawl, so that the counterclockwise rotation of the socket 103 is allowed. Is done. Conversely, lever member 1
04a is swung in the direction of arrow A in the figure, and when the lower end portion in the figure hits the ratchet wheel 103a,
The clockwise rotation of the socket portion 103 in the drawing is allowed, and the counterclockwise rotation is prevented.

As shown in FIG. 2A, the knob member 106 is screwed and fixed to the end of the socket 103 via a supporting metal 107. If the knob member 106 is rotated, the socket 103 fixing the knob member is also rotated at the same time. Therefore, if the operator grips and rotates the knob member 106, the socket portion 103
It is possible to easily and temporarily tighten a fastener such as a nut (not shown) engaged with the nut without reverse rotation.

As shown in FIG. 1, it is desirable to use a knob member 106 having a shape and a size that fits in the palm of the hand. Such a knob member 106
In this case, unlike a perfect circle, it is easy to be caught in the palm of the hand, and even a wet hand or an oily hand can be easily rotated. In addition, because it is large enough to fit in the palm, the fastener can be turned by the force of the wrist instead of the force of the fingertip. Can be provided. Therefore, when a small foreign substance such as sand is caught in the screwed portion of the fastener, even if the fastener cannot be directly turned only by the force of a fingertip, the fastener can be easily turned by the ratchet wrench 100. Can be temporarily tightened.

It is desirable that the knob member 106 be made of a resin material and subjected to a rough surface finishing process. This is because in such a knob member 106, the frictional resistance with the palm becomes larger than that made of a metal material, and it becomes difficult to slide.

FIG. 3 is a perspective view showing a hexagon wrench used in combination with the above-mentioned ratchet wrench 100 which is a tool body. Hex wrench 300 as a polygon wrench
It has a wrench part 301 formed in a regular hexagonal prism and an insertion angle 302 provided at one end thereof. Nothing is provided at the end opposite to the insertion angle 302 side, and this end functions as a hexagon wrench by engaging with a hexagonal hole provided in a cap screw bolt or the like. Further, as shown in FIG. 3, the insertion angle 302 is
03a, as shown in FIG.
It functions as an extension bar connecting the ratchet wrench 100 and the socket 203. Hex wrench 30
0 is used as the extension bar in this manner, the ratchet wrench 100 is
By sliding along the 0 wrench 301, operation can be performed at a position not obstructed by the obstacle 400. On the other hand, in the conventional extension bar, the connection portion with the ratchet handle, which is the tool main body, is located only at one end, so that the obstacle 40 is located at the position shown in FIG.
If there was a 0, this hindered the operation of the ratchet handle.

FIG. 5 is a perspective view showing a hexagon wrench 300 provided with a spherical portion 303 instead of the insertion angle 302. Although the spherical portion 303 has a spherical shape as a whole, it has a hexagonal edge having the same diameter as the wrench portion 301, and can be engaged with a hexagonal hole of a fastener such as a cap screw bolt. In such a spherical portion 303, unlike the hexagonal column wrench portion 301, it can be inserted into the hexagonal hole of the fastener with some inclination. Therefore, the hex wrench 300 is obstructed by an obstacle (not shown) or the like.
Even if it is not possible to insert the wrench straight into the hexagonal hole of the fastener, the hex wrench 3
While the overall 00 is inclined, the spherical portion 3030 can be engaged with the hexagonal hole to tighten the fastener.

Although the ratchet wrench for rotatably supporting the socket formed with the through hole by the ratchet has been described above, a ratchet handle for rotatably supporting the insertion angle for the socket by the ratchet. The present invention can be applied to other ratchet type tightening tools.

[0026]

According to the first, second, third or fourth aspect of the present invention, there is an excellent effect that the fastener can be temporarily temporarily tightened easily without reverse rotation.

In particular, according to the second aspect of the present invention, an excellent effect that the cap screw bolt can be easily and temporarily tightened in addition to a hexagon nut or the like having a regular polygonal column shape as a fastener. is there.

According to the third aspect of the present invention, the tool main body can be rotated at an arbitrary length position of the polygon wrench functioning as an extension bar, so that the work is not obstructed by surrounding obstacles. There is an excellent effect that the tool main body can be rotated by searching for the rotation position.

According to the invention, the spherical end of the polygonal wrench can be inserted into the polygonal hole of the fastener with a certain degree of inclination. Since the fastener can be tightened by engaging with the polygonal hole, even if the polygonal wrench cannot be inserted straight into the polygonal hole due to obstruction by an obstacle or the like, the fastener having the polygonal hole is required. There is an excellent effect that the tool can be tightened.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a ratchet wrench according to an embodiment.

FIG. 2A is a side view showing a ratchet portion of the ratchet wrench detached from a handle. (B)
FIG. 3 is a plan view of the ratchet portion (excluding the knob member) as viewed from above.

FIG. 3 is a perspective view showing a hexagon wrench used in combination with the ratchet wrench.

FIG. 4 is a perspective view showing a usage example of a combination of the ratchet wrench and the hexagon wrench.

FIG. 5 is a perspective view showing the hexagon wrench provided with a spherical portion instead of the insertion angle.

FIG. 6 is a plan view showing an example of a conventional ratchet wrench.

FIG. 7 is a perspective view showing an example of a conventional socket wrench.

FIG. 8 is a perspective view showing a usage example in a combination of the socket wrench and a conventional extension bar.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 ratchet wrench (tool body) 101 handle (gripping part) 102 ratchet part 103 socket part 103a ratchet wheel 104 direction switching lever 104a lever member 104b shaft pin 104c spring member 105 groove 106 knob member 107 supporting metal 200 socket wrench 201 ratchet handle ( Tool body) 202 Ratchet part 203 Socket part 203a Socket 203b Socket hole 204 Direction switching knob 205 Insertion angle 300 Hex wrench (polygon wrench) 301 Wrench part 302 Insertion angle 303 Spherical part 400 Obstacle

Claims (4)

[Claims] An engaging portion for engaging a fastener such as a bolt; and a ratchet portion for regulating a rotation direction of the engaging portion. By applying a reciprocating rotational force to the grip portion, a ratchet-type tightening tool for rotating the engagement portion in a predetermined direction and tightening the fastener is fixed without rotating the grip portion. A ratchet-type tightening tool comprising a knob member for transmitting a rotational force to the engaging portion in a gripped state. 2. A ratchet type fastening tool according to claim 1, wherein said engaging portion engages a regular polygonal column-shaped fastener with a through hole, said grip portion, and said ratchet mechanism. A ratchet-type fastening tool, comprising: a regular polygonal column-shaped polygon wrench engaged with the through hole. 3. A ratchet-type tightening tool according to claim 2, wherein an insertion angle insertable into a socket of a socket used for a socket wrench is provided at an end of said polygon wrench. Type fastening tool. 4. A ratchet-type tightening tool according to claim 2, wherein one end of said polygonal wrench is formed in a spherical shape having an edge similar to that of the polygonal wrench body.