JPH0720261U - Ratchet wrench - Google Patents

Abstract

(57) [Summary] [Purpose] To make it possible to engage the ratchet wrench with a nut for a pipe joint and to easily switch between tightening and loosening operations. A socket 10 having an opening 11 is rotatably attached to a notched circular hole 7 having an opening 6, and the socket 10 is nutd while passing a pipe so that the openings 6 and 11 are aligned with each other. The ratchet wrench main body 1 by moving the operation lever 24 back and forth by putting a finger on a finger hook portion 26 provided near the grip portion and moving the operation lever 24 back and forth.
The operation for switching the tightening direction and the loosening direction of the ratchet pawl 15 can be easily performed while gripping.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a ratchet wrench.

[0002]

[Prior art]

 In order to tighten or loosen the nut with the wrench, it is necessary to perform a complicated operation of changing the wrench each time within the rotation range of the arm.

In order to solve such a problem, for example, a ratchet wrench disclosed in Japanese Utility Model Laid-Open No. 2-70973 discloses a ratchet wrench that rotates an annular socket having external teeth on its outer circumference at the head of a wrench body. A ratchet pawl with a pair of left and right pawls that engage with the external teeth is rotatably attached to the rear of the socket, and one of the pawls is attached to the outside of the socket by the finger hooks protruding on both sides. By engaging with the teeth, the nut can be tightened or loosened while the ratchet wrench remains engaged with the nut.

However, although such a ratchet wrench is suitable for tightening and loosening the nut at a normal mounting position, for example, a nut used for a pipe joint, a nut is provided at one end of the pipe. For things such as those provided, not only can it not be engaged, but when tightening or loosening the nut, the ratchet pawl is switched while holding one end of the gripping part. It has the inconvenience that it cannot do it.

[0005]

[Problems to be solved by the device]

 The present invention has been made in view of such a problem, and its purpose is to be applicable to various nuts, and moreover, to perform a tightening operation and a loosening operation while holding the grip portion. It is to provide an improved ratchet wrench that can

[0006]

[Means for Solving the Problems]

 In other words, the present invention provides a ratchet wrench for achieving such a problem by forming a notched circular hole partially having an opening at the tip of the ratchet wrench body, and the same opening is formed in the circular hole. A notched circular socket having a socket is rotatably mounted, and a slight gap is provided between the socket and the socket, and the claws that engage with the external teeth of the socket are provided on the left and right, and An approximately heart-shaped ratchet pawl with an engaging recess at the end is rotatably attached, and this ratchet pawl is held at a neutral position and a position where it is engaged with the external teeth by a restriction pin that receives the biasing force of a spring. On the other hand, one end of the operation lever is locked to one side of the ratchet claw and the other end reaches near the grip part of the ratchet wrench body in the longitudinal guide groove provided on one side of the ratchet wrench body. Through the pin It is obtained as attached to be displaceable back and forth.

[0007]

【Example】

 Therefore, the embodiment illustrated below will be described. The drawings show an embodiment of the present invention. The ratchet wrench body shown by 1 in the figure is composed of three plates 3, 4 and 5 joined by screws 2.

The wrench body 1 is formed with a notched circular hole 7 having an opening 6 at the tip, and the middle plate 4 shown by hatching in FIG. The diameter of the notched circular hole 7 is formed to be slightly larger than that of the other front and back plates 3 and 5, and the notched cylindrical socket 10 having a part of the opening 11 serves as the flange 12. It is attached so that it can be rotated left and right through.

On the other hand, reference numeral 15 in the drawing is a ratchet pawl for restricting the rotating direction of the socket 10 described above, and the ratchet pawl 15 can rotate in a recess 8 formed at the rear of the socket 10. The front and back plates 3 and 5 covering the upper and lower sides are pivotally supported by fulcrum pins 16.

The ratchet pawl 15 has a substantially heart shape having a pair of locking pawls 17L and 17R on the front left and right sides, and one of the locking pawls 17L and 17R is provided on the outer periphery of the socket 10. By engaging with the external teeth 13, the socket 10 can be rotated only in one of the directions.

On the other hand, reference numeral 21 in the drawing is a restriction pin that restricts the direction of the ratchet pawl 15, and the restriction pin 21 is a long hole 9 provided in the middle plate 4 along the longitudinal direction of the wrench body 1. The ratchet pawl 15 is fitted in the inside of the ratchet pawl 15 and is always engaged with the recess 18 at the rear end of the ratchet pawl 15 by the urging force of the spring 22 acting on the rear end of the ratchet pawl 15 to keep the ratchet pawl 15 at the neutral position where the external teeth 13 are not engaged. In addition, when the ratchet pawl 15 is rotated to one side by the operation lever 24 described later, the ratchet pawl 15 is brought into contact with any one of the side surfaces 19 thereof to hold the position thereof.

On the other hand, reference numeral 24 in the drawing denotes an operation lever for rotating and operating the ratchet pawl 15 described above in any direction, and the tip of the operation lever 24 is a protrusion provided on one side of the ratchet pawl 15. 20 is connected to the wrench body 1 via a pin 25, the other end extends to the vicinity of the grip 29 of the wrench body 1, and the other end has a finger hook 26 and a pin 27. The ratchet pawl 15 can be turned in any direction via the lever 24 by sliding in the longitudinal guide groove 28 provided on the inner surfaces of the front and back plates 3, 5.

Next, the tightening operation of the nut according to the embodiment thus configured will be described with reference to FIGS. 2 and 3.

First, the thumb holding the ratchet wrench main body 1 is applied to the finger hook portion 26 of the lever 24, and the left and right claws 17L and 17R are placed on the outside of the socket 10 as shown in FIG. 1 (a). The ratchet pawl 15 is pivoted to a neutral position where it does not engage with the tooth 13.

Then, in this state, the socket 10 is rotated so that the opening 11 and the opening 6 of the ratchet leech main body 1 are aligned with each other, and as shown in FIG. The hose pipe P is inserted into the circular hole 7 through the through hole, and then the wrench body 1 is lowered to engage the nut 10 with the socket 10 as shown in FIG.

Then, the finger hook 26 is pushed in the distal direction by the thumb, and the ratchet pawl 15 integrated with the operation lever 24 is rotated clockwise in the figure, so that the left engagement pawl 17L is moved to the socket 10. Engage with the outer teeth 13.

Next, when the ratchet wrench main body 1 is rotated clockwise in this state as shown in FIG. 3B, the socket 10 engaged with the ratchet claw 15 is integrated with the ratchet wrench main body 1. Rotate to rotate the nut N in the tightening direction.

Then, when the ratchet wrench main body 1 is rotated counterclockwise as it is after reaching the rotation end of the arm, the ratchet pawl 15 whose right side surface 19 is pressed by the regulation pin 21 is The ratchet wrench main body 1 is rotated counterclockwise so that the spring 22 is bent and displaced a small amount so that the outer teeth 13 of the socket 10 are successively crossed over.

On the other hand, when loosening the nut N, the ratchet pawl 15 is rotated in the counterclockwise direction in the figure by pulling the lever 24, contrary to the above, and the locking pawl 17R on the right side thereof is pulled. The outer teeth 13 of the socket 10 are engaged. Then, when the wrench body 1 is rotated counterclockwise in this state, the wrench body 1 rotates the socket 15 integrally, so that the nut N is rotated in the loosening direction.

[0020]

[Effect of device]

 As described above, according to the present invention, the ratchet wrench is provided with a notched circular hole, which is partially open, at the tip thereof, and the same notched circular socket is rotatably attached thereto. Even for a nut such as a hand, the socket can be easily engaged with the nut by passing the pipe through the opening.

Moreover, the ratchet pawl 15 that regulates the movement of the socket is formed in a heart shape, and a recess is provided at the rear end of the ratchet pawl 15 so that the rotation position of the ratchet pawl 15 is held by the regulation pin provided at the rear and Is configured so that the ratchet pawl can be rotated left and right by the operation lever located near the grip of the ratchet wrench body, so the ratchet pawl is normally set to the neutral position by engaging the regulation pin with the recess at the rear end. Only when the ratchet pawl is held and the ratchet pawl is rotated through the operation lever in the tightening or loosening direction of the nut, this position can be held by the regulating pin and the nut tightening and loosening operations can be performed without hindrance. Furthermore, by operating this operation while holding the ratchet wrench, you can easily switch the tightening and loosening operations of the nut. It is possible.

[Brief description of drawings]

1 (a) and 1 (b) are a plan view and a side view showing a ratchet wrench which is an embodiment of the present invention in a partial cross section.

FIG. 2 is a view showing an internal movement of the ratchet wrench in the same state when the nut is tightened.

3 (a) and 3 (b) are views showing a nut engaging operation and a nut tightening operation.

[Explanation of symbols]

 1 Ratchet Wrench Body 6, 11 Opening 10 Socket 15 Ratchet Claw 21 Control Pin 24 Operation Lever 26 Finger Hook 28 Guide Groove

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koji Hishikawa 1907 Hirata-cho, Suzuka-shi, Mie Honda Motor Co., Ltd. Suzuka Factory (72) Inventor Keiichi Takanase 1907, Hirata-cho, Suzuka-shi, Mie Honda Giken Suzuka Works Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A ratchet wrench main body is provided with a notched circular hole partially having an opening, and a notched circular socket having the same opening is rotatably provided in the circular hole. The ratchet has a substantially heart shape and is provided with a slight gap between the socket and the socket, the claws engaging with the outer teeth of the socket are provided on the left and right, and the engaging recess is provided at the rear end. A pawl is rotatably attached so that the ratchet pawl can be held at a neutral position and a position where the ratchet pawl is engaged with the external tooth by a restriction pin that receives a biasing force of a spring, while one end of the ratchet pawl is The operating lever, which is locked to the side and the other end of which reaches the vicinity of the grip of the ratchet wrench main body, is attached to the longitudinal guide groove provided on one side of the ratchet wrench main body so that it can be displaced back and forth through a pin. Ratchetlet characterized by Punch.