JPS632300Y2 - - Google Patents

Description

[Detailed description of the invention] The invention is a joint equipped with a push ring that spirally moves in the direction of the tube axis by applying rotation.
The present invention relates to a pipe connection tool used when connecting a joint that requires rotational force in an excavated trench formed around a buried pipe.

A typical example of this kind of tool that has been commonly used in the past is a pipe wrench, which is a tool such as a pipe wrench that is set externally to rotate integrally with a joint member that requires rotation, such as the push ring, and is used to rotate the tool against the axis of the pipe. Rotational torque is applied to the member by rotating the member in a plane orthogonal to the member. This thing is
In order to increase the freedom of the tool and the hand holding it to make connection work easier, the width of the excavation structure needs to be sufficiently wide, which increases excavation time, earth and sand replacement, and restoration costs. Not only that, but the workability was poor, and there were drawbacks such as insufficient tightening, which tended to cause problems in the performance of the connection parts.

In view of the above-mentioned circumstances, the present invention facilitates the intended connection work even in narrow excavated trenches.
The purpose is to provide a tool that is advantageous in terms of connection performance.

The characteristic structure of the pipe connecting tool according to the present invention devised to achieve such an objective is that the main body frame, which can be fixed to the pipe to be joined, has a main body frame that has a main body frame fixed to the pipe to be welded, and a main body frame that has a main body frame fixed to the pipe to be joined. an operating lever that can swing back and forth; a spur gear that is rotatable around an axis that is parallel or substantially parallel to the tube axis; and a spur gear that transmits only one-way swinging of the operating lever to the spur gear. The tool body is configured with a ratchet mechanism that intermittently rotates the gear and a pair of bevel gears, and when the tool body is fixed to the tube, the tool body is moved relative to the spur gear within a certain range in the tube axis direction. Another spur gear, which meshes and interlocks in a possible state, is provided so as to be externally fitted and fixed to the pipe fitting member that rotates integrally with the pipe joint member, which moves spirally in the direction of the pipe axis due to rotation. , which can be summed up paraphrasing as
The control lever is configured so that the swing direction of the operating lever that applies rotational force to a spur gear that is externally fixed to a pipe fitting member that requires rotation, such as a push ring, is in a plane along the pipe axis. It is that you are.

The effects of the present invention having such a characteristic configuration are as follows.

In other words, by reciprocating the operating lever and the hand gripping it in a plane along the tube axis,
Since a predetermined rotational force can be applied to the joint member that requires rotation, there is no need to widen the excavation groove width in order to use the tool easily, and the tool can be moved easily and smoothly even in narrow grooves. Can be operated manually. Therefore, the labor for excavation, earth and sand replacement, and restoration costs can be significantly reduced compared to the case of using conventional tools as described above, and the workability and joint performance can be improved.

Embodiments of the present invention will be described in detail below based on the drawings.

Figure 1 is a working diagram in which a pipe connection tool T is attached and used when implementing the continuation method in which a new pipe P is joined to an existing pipe P ₀ via a cheese P ₂ , a straight pipe P ₁ , and a socket S. As clearly shown in Fig. 2, there is a push ring which is fitted onto a newly constructed pipe P such as a steel pipe whose outer periphery is coated with a corrosion-resistant layer Pb and a protective layer Pa, and which moves spirally in the direction of the pipe axis as it rotates. Rotation is applied to A (an example of a member for a pipe joint), and the press ring A is attached to the socket S via a female threaded portion formed on the inner circumferential surface of the socket S. A pipe connecting tool T used for screwing into the socket S so as to be pushed into a predetermined location in the space formed between the pushing ring A and the newly installed pipe P is constructed as follows.

As clearly shown in FIGS. 3 and 4, the pipe P and the socket S are fixed to the main body frame 1, which can be stably fixed to the socket S, which is one of the pipes to be joined, through the wrap-around chains 8, 8. A wide spur gear in which an operating lever 2 is pivotally mounted to be able to reciprocate and swing around an axis Y that is orthogonal to an axis X, and is only rotatable around an axis Z that is parallel to the axis X. 3 is pivotally supported, and this spur gear 3 and the operating lever 2 are interlocked via a pair of bevel gears 5, 5 and a ratchet mechanism 4, so that only one direction swinging of the lever 2 is caused by the spur gear 3. The spur gear 3 is configured to rotate intermittently by transmitting the signal to the engine. In addition to the tool body 6 mentioned above,
A large-diameter, narrow-width spur gear 7 is provided that meshes with and interlocks with the wide spur gear 3 so that it can move relative to the wide spur gear 3 within a certain range in the tube axis direction when the tool body 6 is fixed to the socket S. There is. As shown in FIGS. 4 and 5, this large-diameter, narrow-width spur gear 7 is divided into two in the circumferential direction, and the two semicircular gear members 7A, 7A are integrally connected to each member 7A, 7A. By tightening and connecting the protrusions 7b protruding from both ends of the flanges 7a, 7a in the circumferential direction via the swing bolt 8 and wing nut 9 provided between the protrusions 7b, 7b,
The spur gear 7 is configured to be externally fixed to and detachable from the push ring A, and the inner circumferential surface 7B of the spur gear 7 is formed into a polygonal shape like a box wrench, and is externally fixed to the push ring A. In this state, it is configured to rotate together with this press ring A. In the figure, reference numeral 10 denotes a torque limiter for preventing the unidirectional swing of the lever 2 from being transmitted to the spur gear 3 when the tightening torque of the push ring A exceeds a certain level. is omitted.

Next, to briefly explain the joining work procedure, after temporarily assembling the push ring A to the socket S by hand-tightening, the spur gear 7 split in half is externally fitted and fixed to the push ring A, and a wide flat spur gear 7 is attached to the spur gear 7. The tool body 6 is fixed to the socket S via chains 8, 8 so that the gears 3 mesh and interlock. Thereafter, when the lever 2 is reciprocated around the axis Y, the spur gears 3 and 7 are intermittently rotated via the ratchet mechanism 4 and the pair of bevel gears 5, 5, and the press ring A is rotated integrally and inserted into the socket S. Move spirally. By ending the operation when the torque limiter 10 is activated, joining can be performed with a predetermined tightening force (screwing force).

Another embodiment will be described below.

FIG. 6 shows the above-mentioned split large-diameter spur gear 7 in which two semicircular gear members 7A, 7A are pivotally connected at one end side in the circumferential direction so as to be able to swing open and close.
The structure is such that only one part is required for removal.

It may also be used for joints with external threads.

[Brief explanation of the drawing]

The drawings show an embodiment of the pipe connection tool according to the present invention, in which Fig. 1 is a schematic working diagram, Fig. 2 is a partially cutaway side view of a pipe joint to be joined, and Fig. 3 is an enlarged side view of the main part. , FIG. 4 is an enlarged front view of the main part, FIG. 5 is an enlarged view of the main part in FIG. 3, and FIG. 6 is an enlarged front view of the main part showing another embodiment. 1...Body frame, 2...Operation lever, 3, 7...
spur gear, 4... ratchet mechanism, 5... bevel gear,
6... Tool body.

Claims (1)

[Scope of utility model registration request] The pipe P is attached to the main body frame 1 which can be fixed to the pipe to be joined.
an operating lever 2 that can freely swing back and forth around an axis Y that is perpendicular or nearly perpendicular to the axis X of the tube; a spur gear 3 that can freely rotate around an axis Z that is parallel or almost parallel to the tube axis X; , a ratchet mechanism 4 that transmits only one-way rocking of the operating lever 2 to the spur gear 3 to intermittently rotate the spur gear 3, and a pair of bevel gears 5, 5.
The tool body 6 is configured by providing
Another spur gear 7 meshes with and interlocks with the spur gear 3 so that it can move relative to the spur gear 3 within a certain range in the axial direction of the tube while the tool body 6 is fixed to the tube.
The pipe connecting tool is provided so that it can be externally fitted and fixed to the pipe fitting member A which spirally moves in the direction of the pipe axis due to rotation so as to rotate integrally with the pipe fitting member A.