JP2000263456A - Ratchet wrench - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform an efficient thread fastening work on a pipe. SOLUTION: A socket 5 is divided on a diameter line. An annular support part 2 rotatably supporting the socket comprises a fixed half body 3 integrally protruding from a handle 1; and a moving half body 4 having one end openably pivotally supported at the fixed half body. An annular support part 2 and the socket are opened and can be engaged with and disengaged from a mating fastening member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a ratchet wrench having a socket which can be opened and closed.

[0002]

2. Description of the Related Art A ratchet wrench engages an annular socket with a mating fastening member,
As the handle can be tightened simply by rotating and reciprocating,
Tightening work efficiency is improved. However, fastening on a long object such as a reinforcing bar or a pipe requires fitting a socket from the end of the long object, which is extremely inconvenient and may not be possible depending on the situation. The present invention clarifies a ratchet wrench that can solve the above-described problem by using a socket and a ring-shaped supporting portion that supports the socket as a split type.

[0003]

A ratchet wrench according to the present invention comprises:
In a ratchet wrench in which the socket (5) accommodated in the annular support portion (2) at the distal end of the handle rotates only in one direction due to the reciprocating operation of the handle (1), the socket (5) is divided substantially on the diameter line. An annular support portion (2) rotatably supporting the socket (5) has a fixed half (3) integrally protruding from the handle (1), and one end of the fixed half is pivotally supported to be openable and closable. Movable half (4), the split surface of both halves is a socket
The two halves (3) and (4) that correspond to the diameter line of (5) and that constitute the socket (5) are guide grooves with an enlarged depth formed on the inner peripheral surface of the annular support (2). (21) is slidably fitted to the annular support (2), and is provided with locking means (6) for locking the free end of the movable half (4) in a closed state.

A claw (7) may be provided on one of the fixed half (3) and the movable half (4) so as to be detachable from the ratchet teeth (54) on the outer periphery of the socket (5). Half (3) and movable half (4)
May be provided with claw pieces (7) and (70).

When the fixed halves (51) and (51) are arranged on a perfect circle instead of a half-arc, the socket halves (51) and (51) have a space between the socket halves (51) and (51). A gap (50) may be formed in the space.

Further, each of the socket halves (51) (51) may be divided into a plurality of pieces in a plane including the axis of the socket.

[0007]

[Operation and Effect] When the divided surfaces of the socket (5) and the annular support portion (2) are substantially aligned and the locking means (6) is unlocked, the movable half (4) and the movable half (4) are The accommodated socket half (51) opens with respect to the mating fixed half (3) and the mating socket half (51). A mating fastening member is fitted between the opened socket halves (3) and (4), and the movable half (4) is closed and locked. The tightening operation is performed by reciprocating the handle (1).

When the tightening is completed, the handle (1) is loosened until the divided surface of the socket (5) and the divided surface of the annular support portion (2) are substantially coincident with each other. (The member does not become loose.) Then, the lock is released and the annular support (2) and the socket (5) are opened.

As described above, the socket (5) and the socket
Since (5) can be opened and closed, the mating fastening member is located on a long object or a long object, and the socket (5) can be easily disengaged and is convenient. If the claw pieces (7) and (70) are provided on both the fixed half (3) and the movable half (4), when the movable half (4) is opened, the fixed half (3) side The socket half (51) is also a movable half
The socket half (51) on the (4) side is also prevented from slipping off the guide groove (21) with the claw pieces (7) and (70) acting as resistance.

The socket halves (51) and (51) are exactly 1/2 arc
(180 °), if both halves (51) and (51) are arranged on a perfect circle and a gap (50) is created between the two socket halves (51) and (51) After the socket has been manufactured, the annular socket can be cut along the diameter line to form socket halves (51) (51). If the socket halves (51) and (51) are exactly 円 arc, there is no cutting allowance for the annular socket, and the manufacturing method of dividing the annular socket into two on the diameter line cannot be adopted.

In addition, the socket halves (51) and (51) are
If it is a circular arc, the butting surfaces of the socket halves (51) and (51) come into contact first when the movable half (4) is closed due to processing errors in the annular support (2), and There is a risk that the half (4) will not be completely closed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a handle (1) made of an aluminum alloy is provided with an annular support (2) projecting from a tip end thereof, and a socket (5) is rotated on the annular support (2). Housed as possible.

The inner surface of the socket (5) has a polygonal engagement hole (52).
A ridge (53) is formed on the outer periphery in the circumferential direction, and a ratchet tooth (54) is formed on the ridge (53). As is well known, the ratchet teeth (54) are caught by claw pieces (7) (70), which will be described later, in the direction of tightening the mating tightening member (not shown) as shown by arrow A in FIG. Has a shape such that the nail pieces (7) and (70) escape.

As shown in FIG. 4, a ridge (53) of the socket (5) is provided.
Is expanded outward, and is slidably fitted in an annular guide groove (21) having an enlarged depth formed on the inner peripheral surface of the annular support portion (2).

A feature of the present invention is that the annular support (2) and the socket (5) are of a split type. The annular support (2)
A fixed half (3) protruding bifurcated from the tip of the handle (1) integrally with the handle (1), and a movable half connected at one end to the fixed half (3) by a pivot (22) so as to be openable and closable. (4). The movable half (4) is also formed of an aluminum alloy in the same manner as the fixed half (3).

The annular support (2) is provided with a locking means (6) for locking the movable half (4) in a closed state, and the locking means (6) is provided at the free end of the movable half (4). And a movable hook (62) provided at a position corresponding to the fixed hook (61) of the fixed half (3).

The two hooks (61) and (62) are formed of a metal having high rigidity, and the fixed hook (61) is fitted and fixed to the mounting hole (41) formed in the movable half (4) with a pin. . Movable hook
The bracket (62) is pivotally supported by a bracket (31) protruding from the fixed half (3) and is urged by a spring (64) in a direction in which it engages with the fixed hook (61).

At the substantially central portion of each of the fixed half 3 and the movable half 4, claw pieces 7 and 70 are provided which engage and disengage with the ratchet teeth 54 of the socket 5. . The nail pieces (7) and (70) are provided with holes (23) and (23) formed on the inner surfaces of the fixed half (3) and the movable half (4).
The socket (5) is disposed so as to be able to protrude and retract toward the axis of the socket (5), is urged inward by a spring (71), and has a ratchet tooth (5
4).

However, when released, the movable half (4) and the socket halves (51) and (51) accommodated in the movable half (4) become the mating fixed half (3) and the socket half (51). Open for). A mating fastening member is fitted between the opened socket halves (3) and (4), and the movable half (4) is closed and locked. The tightening operation is performed by reciprocating the handle (1).

When the tightening is completed, the handle (1) is loosened until the divided surface of the socket (5) substantially coincides with the divided surface of the annular support portion (2). (The member does not become loose.) Then, the lock is released and the annular support (2) and the socket (5) are opened.

As described above, the socket (5) and the socket
(5) can be opened and closed, so that the socket (5) can be easily engaged even if the mating fastening member is a long object such as a reinforcing bar or a pipe, or is screwed onto the long object. It can come off and is convenient.

Claw pieces are attached to both the fixed half (3) and the movable half (4).
(7) If the (70) is provided, when the movable half (4) is opened, the socket half (51) on the fixed half (3) side also moves.
The socket half (51) on the (4) side is also prevented from slipping off the guide groove (21) with the claw pieces (7) and (70) acting as resistance.

FIG. 5 shows another embodiment of the socket (5), wherein the socket halves (51) (51) are not half-arcs,
When the fixed halves (51) and (51) are arranged on a perfect circle, a gap of about 0.5 to 2.0 mm is generated between the socket halves (51) and (51).

In the case of the socket (5) shown in FIG. 5, even if the annular socket is manufactured and then cut along the diameter line, there is no problem because the cutting margin is a gap. If the socket halves (51) and (51) are correctly 弧 arc, there will be no cutting allowance for the annular socket, and the annular socket will be 2 mm in diameter.
A split manufacturing method cannot be adopted.

The socket halves (51) and (51) are correctly
If the arc is an arc, the butting surfaces of the socket halves (51) and (51) come into contact first when the movable half (4) is closed due to a processing error of the annular support portion (2) and the movable half. Although the body (4) may not be completely closed, in the case of FIG. 5, before the movable half (4) of the annular support (2) is completely closed, the socket halves (51) and (51) are closed.
There is no inconvenience of matching.

In implementing the present invention, each socket half
(51) and (51) may be divided into a plurality of pieces in a plane including the axis of the socket. That is, the socket (5) may be composed of four or more pieces.

The present invention is not limited to the configuration of the above embodiment, and various modifications are possible within the scope of the claims.

[Brief description of the drawings]

FIG. 1 is a front view of a partially cut ratchet wrench.

FIG. 2 is an enlarged view of a main part of the above.

FIG. 3 is an enlarged view of a state where an annular support portion and a socket are opened.

FIG. 4 is a cross-sectional view along the line BB in FIG. 3;

FIG. 5 is a front view of another embodiment of the socket.

[Explanation of symbols]

 (1) Handle (2) Annular support (3) Fixed half (4) Movable half (5) Socket (51) Socket half (6) Locking means (7) Claw piece

Continued on the front page (72) Inventor Shoji Yamamoto 3-14-3 Fukaekita, Higashinari-ku, Osaka City, Osaka Prefecture Inside Maeda Metal Industry Co., Ltd. (72) Inventor Masagen Okawa 4-11-5 Matsuehigashi, Wakayama City, Wakayama Prefecture

Claims (4)

[Claims] 1. A socket (5) housed in an annular support (2) at the tip of a handle by a reciprocating operation of a handle (1).
In a ratchet wrench in which the socket rotates only in one direction, a socket (5) is divided along a substantially diameter line, and an annular support (2) for rotatably supporting the socket (5) is integrally provided with a handle (1). Fixed half (3) and a movable half (4) pivotally supported at one end to open and close the fixed half. The split surfaces of both halves correspond to the diameter line of the socket (5). The socket
The two halves (3) and (4) that constitute (5) are slidably fitted in a guide groove (21) having an enlarged depth formed on the inner peripheral surface of the annular support portion (2). Movable half body in support part (2)
A ratchet wrench provided with a locking means (6) for locking the free end of (4) in a closed state. 2. Both the fixed half (3) and the movable half (4)
Claw pieces that can be disengaged from the ratchet teeth (54) on the outer periphery of the socket (5)
(7) The ratchet wrench according to claim 1, wherein (70) is provided. 3. A ratchet according to claim 1, wherein a gap (50) is created between the two socket halves (3) and (4) when the socket halves (3) and (4) are arranged on a perfect circle. wrench. 4. The two halves (3) and (4) are each further divided into a plurality of pieces in a plane including the axis of the socket.
A ratchet wrench according to any one of claims 1 to 3.