JPH074770B2 - Wrench device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention provides a socket that is rotatable with respect to a wrench body, and the socket and the wrench body are opposed to each other in a state where a driving force for the socket is released. The present invention relates to a wrench device including a fluid pressure driven wrench provided with locking means for preventing rotation.

[Conventional technology]

Conventionally, when tightening and fixing nuts to a plurality of bolts, an operator performs a tightening operation for each bolt while supporting one hydraulically driven wrench.

[Problems to be Solved by the Invention]

However, according to the above-mentioned conventional wrench, the worker supports the body against the reaction force acting on the body of the wrench against the tightening force of the bolt or nut that is the object to be tightened in the rotation direction of the socket. However, there is a drawback that it requires a great deal of force to support it. Further, in such a wrench, one operator must perform a tightening operation for each of a plurality of tightening objects one by one, for example, by using an airtight lid or the like with a bolt or a bolt. When tightening with nuts, the tightening order is important, and it is necessary to tighten bolts and nuts that are distant from each other, and even when multiple work objects of the same type are lined up, each work For each object, the same tightening operation has to be repeated, and there is also the drawback that the work efficiency is extremely poor.

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

[Means for Solving the Problems]

To achieve this object, a characteristic configuration of a wrench device according to the present invention is to provide a pair of wrenches, integrally connect one end of a first link lever to a first body of one of the two wrenches, and One end of the second link lever is integrally connected to the second main body, and the other ends of the first and second link levers are pivotally connected to each other so that the two wrenches can be moved to and from each other. The second link lever is provided with a bite release operation portion that allows the second link lever to be manually and simultaneously rotated in a rotation direction opposite to the tightening rotation direction of each socket.

[Work]

In other words, the wrench body is attached to one end of each of the link levers that pivotally connect the other ends to each other so that the two wrenches can be adjusted from one perspective to the next. In addition, it is easy to mount the pair of wrenches so that their intervals are equal to the intervals of a plurality of tightening objects and to mount the sockets on the respective tightening objects to support them.

Then, for example, when tightening or loosening the bolt, the reaction force acting in the direction opposite to the rotation direction of the socket acts on the pivotal fulcrum of both link levers, where it is attached to another wrench. It is not necessary to support each wrench with a particularly strong force to resist the reaction force because it is counteracted by the other wrench as a result of receiving the drag force of the link lever, it just supports the wrench. Just get better. This is also useful when tightening a bolt or the like for tightening a circular lid, and at the same time, it is possible to tighten two bolts that face each other in the radial direction, which is useful for preventing trouble such as one-side tightening.

Furthermore, as a result of tightening the bolt, the head of the bolt is bitten into the socket, and if the wrench cannot be removed from the tightening target, the bite release operation section that acts on both wrenches at the same time, For example, if both link levers are simultaneously rotated in the opposite rotation direction to the tightening rotation direction of the wrench by hitting with a hammer or pulling through a wire, both wrench simultaneously tighten the bolts through their respective sockets. By rotating in the loosening direction, the bite state of each socket can be released simultaneously and easily.

〔The invention's effect〕

Therefore, according to the wrench device of the present invention, when the tightening target such as the bolt or the nut is screwed and tightened, the plurality of wrenches resist the reaction force acting on the wrench body against these tightening forces. Since it can be easily supported without requiring a large amount of force, and a plurality of tightening objects can be tightened at the same time by using these wrenches, the working efficiency can be greatly improved.

〔Example〕

 Examples of the present invention will be described below.

As shown in FIG. 1, the wrench (1) is a hydraulically driven rotary wrench, and contains a hydraulic motor (M) and a deceleration transmission mechanism (5) for decelerating and transmitting the output from the hydraulic motor (M). It is composed of a body (2) and a socket (4) fitted to an output shaft (3) of a quadrangular prism protruding from the tip of the wrench body (2).

The socket (4) is attached with a pin penetrating through an elongated hole (3a) formed through the output shaft (3) and a mounting hole formed in the socket (4), and with the wrench body (2). A spring for urging the socket (4) in the axial direction of the output shaft (3) is interposed between the sockets (4), so that the sockets (4), ( Each of 4) can be adjusted to the axial direction position.

The deceleration transmission mechanism (5) is a planetary gear system having a deceleration of about 60 to 1, and is interposed between the hydraulic motor (M) and the output shaft (3).

That is, since the reduction mechanism (5) has a large reduction ratio, and therefore exhibits a very large inertial resistance against the rotation input from the output shaft side, the relative rotation between the socket (4) and the wrench body (2). It becomes a locking means to disable.

Connection holes (6) and (7) for two hydraulic pipes for supplying and collecting hydraulic pressure to the hydraulic motor (M) to drive it.
Is provided, and the rotational direction of the hydraulic motor (M) can be reversed by switching the inflow / outflow direction of the pressure oil with respect to the connection holes (6) and (7). By doing so, it is possible to cope with the tightening of the object to be tightened with the reverse screw, and it is also possible to loosen the tightened object to be tightened.

The socket (4) has a hexagonal fitting hole (4a) in front view.
After the head of a nut or bolt having a hexagonal shape is fitted into the fitting hole (4a), the hydraulic motor (M) is driven to tighten the tightening target.

As shown in FIGS. 1 and 2, one end of the first link lever (10) is integrally connected to the first main body (2A) of one of the two rotary wrenches (1) described above, and the other is One end of the second link lever (11) is integrally connected to the second main body (2B) of the first main body (2B), and the first and second link levers (1) and (1) can be moved to each other so that the first and second link levers (1) and (1) are movable. Ten),
(11) The other end portions are pivotally connected to each other to form a wrench device, and further, both wrench units are provided so as to be convenient for simultaneously tightening a plurality of tightening objects arranged at the same intervals. An expansion mechanism (9) provided in an adjustment mechanism (8) for adjusting the distances (1) and (1) from each other is pivotally connected.

The adjusting mechanism (8) comprises a pair of link members (9a) and (9b) for the telescopic link (9) and both ends of which are pivotally connected to the rotary wrenches (1) and (1). A bolt (9c) is attached to the other end of one of the link members (9a) and (9b), and a rack gear (9d) is fitted to the other end of the link member (9c) at an arbitrary position with the tip of the bolt (9c). The link members (9a) and (9b) are slid relative to each other in the longitudinal direction thereof so that the distance between the rotary wrenches (1) and (1) can be adjusted. .

That is, the rotary wrench (1),
In order to adjust the position of (1), the bolt (9c) provided on one wrench member (9a) of the expansion link (9) provided in the adjustment mechanism (8) is opened to open the first link lever (10). While rotating both wrench levers (10), (11) around the pivotal connection point (12) of the second link lever (11) and the rotary wrench (1), position the rotary wrench (1) at a predetermined position. After that, the bolt (9c) is fitted to the rack gear (9d) to fix the adjusting mechanism (8). In this way, for a plurality of tightening objects arranged at the same interval, the two sockets (4), (4) fixed at the intervals are respectively attached to the tightening objects to provide two tightening objects. Can be tightened simultaneously, and then two tightening objects can be tightened in sequence without adjusting the distance between the sockets (4) and (4). This is useful when two work objects of the same type are arranged side by side. If the distance between both rotary wrenches (1) and (1) is adjusted to the work object distance, tightening of one work object is performed. When tightening the object, the other corresponding tightening object can be tightened at the same time, and the work efficiency is significantly improved.

Pivot connection point (12) of both link levers (10), (11)
A pulling wire (13) for releasing the biting state between the socket (4) and the bolt or nut is provided on the.

That is, for example, with a rotary wrench (1), use a bolt (1
4) and tighten the bolts (14) as shown in Fig. 3.
The socket (4) bites into the head (14a) in the tightening direction, and the socket (4) cannot be removed from the bolt (14). At that time, since the wire (13) is pulled in a direction opposite to the tightening direction of the bolt within the range of the play at the pivotal connection point (12), the bite state is released. is there.

That is, the first link lever (10), the second link lever (11), and the wire (13) form a bite release operation section (15).

[Another embodiment]

 Another embodiment of the present invention will be described below.

In the above embodiment, the hydraulically driven rotary wrench has been described, but any wrench provided that it has a locking means for disabling relative rotation in the state where the driving force is released between the main body and the socket. , Can be used with any wrench.

In the above embodiment, the bite release operation portion is configured by the first link lever and the second link lever, and the wire provided at the pivotal connection point of both the first and second link levers. You can remove it. In this case, for example, by hitting the vicinity of the pivotal fulcrum of the first link lever or the second link lever, which is the operation point of the bite release operation portion, with a hammer or the like, the first link lever and the second link lever are connected to the first and second link levers, respectively. The same effect can be obtained by rotating the wrench in the rotation direction opposite to the tightening rotation direction of the socket.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

The drawings show an embodiment of the wrench device according to the present invention. Fig. 1 is a plan view of the wrench device, Fig. 2 is a front view of the same, and Fig. 3 is a sectional view of an essential part. (1) …… wrench, (2) …… wrench body, (2A) ……
1st body, (2B) ... 2nd body, (4) ... socket,
(10) …… First link lever, (11) …… Second link lever, (15) …… Bite release operation section.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Gojoen Nao 1-1-1, Nakamiya Oike, Hirakata-shi, Osaka Prefecture Hokukata Works, Kuboda Iron Works Co., Ltd. (72) Yasuhiro Kuriyama 1-chome, Omiya Nakamiya, Hirakata, Osaka Prefecture No. 1-1 No. 1 in the Hirakata Plant of Kubota Iron Works Co., Ltd. (56) References JP-A-56-62769 (JP, A) SAI-KAI 62-95880 (JP, U)

Claims (1)

[Claims] 1. A wrench body (2) is provided with a socket (4) rotatably, and the socket (4) and the wrench body (2) are provided in a state where a driving force for the socket (4) is released. A wrench device provided with a fluid pressure drive type wrench (1) provided with a lock means for making relative rotation impossible. A pair of the wrench (1) is provided, and the wrench (1), (1) One end of the first link lever (10) is integrally connected to one of the first main bodies (2A), and one end of the second link lever (11) is integrally connected to the other second main body (2B). The first and second link levers (10), (1) are movable so that they can be moved relative to each other.
(11) The other ends are pivotally connected to each other, and the first and second
A bite release operating section (15) is provided which allows the link levers (10) and (11) to be manually and simultaneously rotated in a rotation direction opposite to the tightening rotation direction of the sockets (4). A wrench device.