JPH03142175A - Wrench device - Google Patents

Abstract

PURPOSE:To easily support plural wrenches without need for a large force in the case of fastening bolt and nut with their screwing to a fastening object, by linking a pair of wrenches with links freely movably far and near each other. CONSTITUTION:In case of fastening or loosening a bolt on a fastening object, the reaction force exerting in the reverse direction to the rotating direction of a socket 4 is offset by the other wrench 1 via the links 9 - 11 connecting each other. So, the need for supporting the respective wrenchs with specially strong force in order to resist to the reaction force is eliminated. Moreover, as the result of fastening a bolt, the state of the head of the bolt biting into the socket occurs and in the case of the wrench being unable to be removed from the fastening object, the biting release operation part 15 simultaneously acting on both wrenches is struck by a hammer, etc., for instance, or pulled via a wire, etc., and the biting state of the socket is simultaneously released by rotating the wrench in the rotation direction reverse to the fastening rotation direction by the wrench.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a fluid pressure pump that is provided with a locking means that prevents a rotatable socket and a main body from rotating relative to each other when the driving force for the socket is released. The present invention relates to a wrench device equipped with a drive type wrench.

[Conventional technology]

Conventionally, when tightening and fixing nuts on a plurality of bolts, an operator has to tighten each bolt one by one while supporting one hydraulically driven wrench.

[Problem to be solved by the invention]

However, according to the conventional wrench described above, the operator must support the main body of the wrench against the reaction force acting on the main body of the wrench against the tightening force of the nut acting in the direction of rotation of the socket. The drawback was that it required a great deal of force to support it.

Furthermore, with such a wrench, one worker must tighten each bolt one by one, which is an extremely inefficient work. There was also a drawback.

The object of the present invention is to eliminate the above-mentioned conventional drawbacks.

[Means to solve the problem]

In order to achieve this object, the characteristic configuration of the wrench device according to the present invention is such that a pair of wrenches are connected by a link so as to be movable near and far, and each of the pair of sockets is connected in a direction opposite to the tightening rotation direction of the wrench. The mechanism is provided with a biting release operation section that can be rotated manually and simultaneously in the rotational direction.

[For production]

That is, when tightening bolts and nuts on a plurality of objects to be tightened, a pair of wrenches are fixed by adjusting the lengths of the links so that the distance between the wrenches is equal to the distance between the objects to be tightened.

For example, when tightening or loosening a bolt on an object, the reaction force acting in the opposite direction to the direction of rotation of the socket is canceled out by other wrenches via links that connect each other. Therefore, it is no longer necessary to support each wrench with a particularly strong force in order to resist the reaction force.

Furthermore, when the head of the bolt becomes stuck in the socket as a result of tightening the bolt, and the wrench cannot be removed from the object to be tightened, the jamming release operation section that simultaneously acts on both wrenches can be set to For example, by hitting it with a hammer etc. or by pulling it through a wire etc.
By rotating the wrench in the direction opposite to the tightening direction of the wrench, the jammed states of the respective sockets can be released simultaneously and easily.

〔Effect of the invention〕

Therefore, according to the wrench device of the present invention, when tightening a bolt or nut to an object to be tightened, it is possible to easily support a plurality of wrenches without requiring much force, and moreover, the wrench can be tightened simultaneously by the wrenches. Since the work can be carried out with the help of other tools, it has become possible to greatly improve work efficiency.

〔Example〕

The present invention will be explained in detail below.

As shown in Figure 1, a hydraulically driven rotary wrench (
1) is a main body that houses a hydraulic motor (M) and a deceleration transmission mechanism (5) that decelerates and transmits the output from the hydraulic motor (M).
2) and a socket (4) fitted onto a square columnar output shaft (3) protruding from the tip of the main body (2).

The socket (4) is attached by passing a pin through a long hole (3a) formed through the output shaft (3) and a mounting hole formed in the socket (4), and is attached to the main body (2).
) and the socket (4) is interposed a spring that biases the socket (4) in the axial direction of the output shaft (3).
), (4) can be adjusted to the respective axial positions.

The deceleration transmission mechanism (5) is a planetary gear type with a deceleration rate of approximately 60:1, and is connected to the hydraulic motor (M) and the output shaft (3).
There is an interposition in between.

That is, the speed reduction mechanism (5) serves as a locking means that disables relative rotation between the socket (4) and the main body (2).

The hydraulic motor (M) has two hydraulic piping connection holes (6) and (7) for supplying and recovering hydraulic pressure for driving.
The direction of rotation of the hydraulic motor (M) is changed by changing the direction of flow of pressure oil into and out of the connection holes (6) and (7).

The socket (4) has a hexagonal fitting hole (4a) when viewed from the front.
), and after fitting the head of a hexagonal nut or bolt into the fitting hole (4a), the hydraulic motor (M) is driven to tighten the object to be tightened.

As shown in FIGS. 1 and 2, the two rotary wrenches (1) described above are pivotally connected by a first link (9) equipped with an adjustment mechanism (8) that allows them to move freely near and far. , rotary wrench (1).

(1) Fix the second links (10) and (11) to each, and connect the tips of the second links (10) and (11) to each other, including the axes of the rotary wrenches (1) and (1). The wrench device is constructed by pivotally connecting them outside of a straight line.

The adjustment mechanism (8) has one end connected to a rotary wrench (1).
), links (9a) pivotally connected to (1), respectively.

The other end of (9b) is configured with a pole h (9c) on one side and a rack gear (9d) that fits in any position with the tip of the bolt (9c) on the other side, and a rotary wrench (1). , (1) can be adjusted by sliding in the longitudinal direction of the links (9a) and (9b).

In other words, the rotary wrench (1), (
1), open the port h (9c) of the adjustment mechanism (8) of the first link (9), and then adjust the position of the second link (1,
After the rotary wrench (1), (+,) is in the predetermined position while swinging the second link (10), (11) around the pivot connection point (12) of 0), (11). , fixing the adjustment mechanism (8).

The pivot connection point (1) of the second links (1,0) and (11)
2) is provided with a tension wire (13) for releasing the jammed state between the socket (4) and the bolt or nut.

In other words, for example, use the rotary wrench (1) to
4), the bolt (14) is tightened as shown in Figure 3.
) The socket (4) gets stuck in the tightening direction against the head (14a) of the hole (14), making it impossible to remove the socket (4) from the hole (14). At that time, the jammed state is released by pulling the wire (13) in the opposite direction to the tightening direction of the bolt within the range of the assembly play at the pivot connection point (12).

That is, the second links (10), (11) and the wire (13) constitute a jamming release operation section (15).

[Another example]

Another embodiment of the present invention will be described below.

In the previous embodiment, a hydraulically driven rotary wrench was described, but any wrench may be used as long as it is provided with a locking means that prevents relative rotation between the main body and the socket when the driving force is released. , can be used with any wrench.

In the previous embodiment, the link connecting the pair of wrenches is composed of a first link and two second links, but the link is composed of only one first link. It's okay.

In the previous embodiment, the biting release operation part is the second link,
Although it is constructed with a wire provided at the pivot connection point of the second link, the wire may be removed. In this case, the same effect can be obtained by rotating the socket (4) in the opposite rotational direction to the tightening rotational direction by, for example, hitting the second link with a hammer or the like.

Furthermore, as the biting release operation part, the second link fixed to each rotary wrench is not pivotally connected, and the second link of each rotary wrench is not connected.
The links may be connected by interlocking wires.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

The drawings show an embodiment of the wrench device according to the present invention, and FIG. 1 is a plan view of the wrench device, FIG. 2 is a front view thereof, and FIG. 3 is a sectional view of the main part. (1)...Wrench, (2)...Body,
(4)... Socket, (15)... Biting release operation part.

Claims (1)

[Claims] A hydraulically driven wrench (
1), the wrench device includes a pair of wrenches (1);
, (1) are mutually linked so that they can be moved near and far (9), (10
) and (11), and the pair of sockets (4) and (4) are simultaneously rotated manually in a rotation direction opposite to the tightening rotation direction by the wrenches (1) and (1), respectively. A wrench device equipped with a flexible engagement release operation part (15).