JP3002121U - Pipe wrench holder for thread cutting machine - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to a pipe wrench receiver used with a screw cutting machine, which prevents the thread cutting machine side from being damaged by the handle of the pipe wrench and can be used for various types of pipe wrenches. The purpose is to realize a receiver. [Structure] Attaching to and detaching from a guide bar (8) extending in a direction parallel to the axis of a pipe to be processed which is held by a chuck (4) of a threading machine body, or a carriage (9) movably supported by this guide bar. It has a saddle part (23) which is freely attached and should be placed on a guide bar or a carriage, and a bearing part (25, 27) for receiving the handle part (101, 201) of the pipe wrench (100, 200). Pipe wrench receiver for thread cutting machines.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pipe wrench receiver that can be easily attached to, for example, existing thread cutting machines. A pipe threader may be used to tighten or loosen the pipe. Immediately, when screwing the fitting into the pipe or when removing the fitting screwed into the pipe, attach the pipe to the chuck of the threading machine, fix the fitting by grasping with a pipe wrench, and rotate the pipe with the threading machine. As a result, as the pipes rotate relative to each other, the pipes easily disengage from or screw into the fittings.

[0002]

[Prior art]

 When a pipe (or joint) is tightened or loosened using a threading machine in this way, the pipe wrench that grips the joint generally has a handle bar or a carriage that guides the handle of the threading machine body. Directly applied on top.

[0003]

[Problems to be solved by the device]

 However, if such work is repeated, not only the appearance of the carriage or the guide bar will be damaged due to the dents or scratches on the carriage and the guide bar due to the handle of the pipe wrench, but also the threading work of the original thread cutting machine. May be adversely affected. In addition, as a pipe wrench, it is preferable to use a so-called “offset pipe wrench” whose jaw moves in a direction orthogonal to the handle part, especially in the case of work at a narrow work site, but with a normal straight pipe wrench Differently, the position of the handle floated from the carriage or the guide bar, making it difficult to use the offset pipe wrench under normal conditions.

[0004]

[Means for Solving the Problems]

 The object of the present invention is to solve the above-mentioned problems and to be easily attached to a guide bar or a reciprocating table of a threading machine, and to receive a handle of a pipe wrench to protect the guide bar or carriage. To provide a pipe wrench receiver. Another object of the present invention is to provide a simple pipe wrench holder for a thread cutting machine that can be used for at least two types of pipe wrenches, such as a straight pipe wrench and an offset pipe wrench.

In order to achieve the above object, a guide bar extending in a direction parallel to an axis of a pipe to be processed, which is held by a chuck of a threading machine body, or a carriage which is movably supported by the guide bar is attached to and detached from the guide bar. According to the present invention, a freely attachable pipe wrench receiver has a structural feature that it has a saddle part to be placed on a guide bar or a carriage and a bearing part for receiving the handle part of the pipe wrench. (Claim 1).

In order to realize a dual-purpose pipe wrench receiver, the pipe wrench receiver has at least two bearing portions that are arranged in parallel in the axial direction of the pipe to be processed and that receive the handle portions of at least two types of pipe wrenches. Are formed (claim 2). Preferably, at least one of the at least two bearing parts is formed as a receiving groove (claim 3). Further, at least two bearing portions have different height positions from the saddle portion (Claim 4). Preferably, the pipe wrench receiver is further provided with a positioning engagement portion which engages with a corresponding portion of the carriage to limit movement of the pipe to be processed in the axial direction (claim 5).

[0007]

[Action]

 According to the present invention, the pipe wrench receiver is simply mounted on the pipe receiving rod or the carriage by the saddle portion, and the installation is extremely easy. Further, since the handle of the pipe wrench is held by the supporting portion and does not directly contact the guide bar or the carriage of the thread cutting machine, there is no dent or scratch (claim 1). Also, if at least two upper bearing parts are arranged side by side in the axial direction of the pipe to be processed, for example, a straight pipe wrench and an offset pipe wrench can be used by supporting them separately on the respective bearing parts of the same pipe wrench receiver. Yes (claim 2). If the support portion is formed as a receiving groove, the handle portion of the pipe wrench is securely held in this receiving groove, and it is possible to prevent the handle portion of the pipe wrench from accidentally coming off the receiver during work ( Claim 3).

When the pipe wrench holder of the present invention is used for both the straight pipe wrench and the offset pipe wrench, these bearing parts are provided when the straight pipe wrench and the offset pipe wrench are attached to the joint in the normal position. The height position from the saddle differs depending on the height position of the handle. As a result, the straight pipe wrench can be properly supported on the lower bearing portion, and the offset pipe wrench can be properly supported on the higher bearing portion (claim 4). By engaging the positioning engagement portion with the corresponding portion (for example, the protrusion) of the carriage, it is possible to prevent the pipe wrench receiver from accidentally moving with respect to the carriage in the axial direction of the pipe to be processed. (Claim 5).

[0009]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, with reference to FIG. 7, an outline of the general configuration of a general thread cutting machine to which the present invention can be applied will be described. The threading machine 15 is provided with a headstock 2 on a sturdy base 1 and a chuck 4 that is rotated by a high torque by an electric motor 3 provided on the headstock 2. The chuck 4 is configured so that the pipe P to be processed can penetrate together with the headstock 2, and is configured to grip the pipe P through which the chuck 4 penetrates.

Further, a cutter 5 and a die head 6 are coaxially arranged on the chuck 4, and the cutter 5 is configured to rotate so as to be retracted from the axis of the chuck 4. It is configured to have a die for screw processing attached to the core, or a fitting that replaces the die. The cutter 5 and the die head 6 are not directly related to the present invention. A scroll chuck 7 is disposed coaxially with the chuck 4 at the rear of the headstock 2 and is configured to pivotally support a pipe material gripped by the chuck 4. The cutter 5 and the head 6 are attached to a carriage 9 movably provided on a pair of rails (guide bars) 8 extending in parallel with the axis of the pipe P. The carriage 9 can be arbitrarily moved in the axial direction by a handle 10. It is configured to be able to move to. The headstock 2 is provided with an operation unit 11 having an operation switch and the like.

When the joint T (FIG. 5) is screwed onto the pipe P or the joint T screwed into the pipe P is removed from the pipe P by using the screw cutting machine as described above, the joint T is a pipe wrench. While holding at 100 (FIG. 5) or 200 (FIG. 3), the pipe P is gripped and rotated by the chuck 4 of the thread cutting machine. As a result, the pipe P rotates relative to the joint T and both screws are tightened or loosened.

1 and 2 show a combined type pipe wrench receiver 21 according to the present invention. 1 shows a state in which the pipe wrench receiver 21 is attached to the carriage 9, and FIG. 2 shows a state before the pipe wrench receiver 21 is attached to the carriage 9. The pipe wrench receiver 21 basically supports a saddle portion 23 mounted on the carriage 9, a first support portion 25 that supports the offset pipe wrench 100 (FIG. 5), and a straight pipe wrench 200 (FIG. 3). The second support portion 27 is provided.

The saddle portion 23 has an arcuate concave surface 29 whose lower surface corresponds to the circular outer shape of the carriage 9, so that the saddle portion 23 can be placed exactly on the corresponding circular portion 9 a of the carriage 9. Alternatively, the curvature of the concave portion 29 may be slightly larger than the maximum diameter of the guide bar 8 of the thread cutting machine to which the concave portion 29 should be applied. This will accommodate all guide bars and hence threading machines. Preferably, the corresponding circular portion 9a of the carriage 9 is provided with a projection 9b forming a U-shaped groove, while the receiving member 21 is provided with a positioning engagement portion 31 corresponding to the projection 9b. The positioning engagement portion 31 has a U-shaped groove 33 that fits into the protrusion 9b. By fitting the protrusion 9b into the U-shaped groove 33, the receiving tool 21 is fixed to the carriage 9, and the pipe P It does not move accidentally in the axial direction. The positioning and coupling means is not limited to the one shown in the figure, and may be any means such as a pin and a hole, a screw, a hook, or the like.

Preferably, the receiver 21 integrally has an arm 35 that straddles the pair of guide bars 8, and a shaft 37 that is inserted into a mounting hole 15 formed in the carriage 9 is provided at the other end. Thus, the positioning member 31 and the projection 9b are engaged with each other, and the shaft 37 and the mounting hole 15 are engaged with each other, so that the receiver 21 is securely and immovably attached to the carriage 9. Moreover, the receiving tool 21 can be easily removed from the carriage 9. That is, it is extremely easy to attach and detach the receiving tool 21.

The first support portion 25 has a receiving groove 26 for receiving the handle portion 101 of the offset pipe wrench 100 shown in FIG. The second support portion 27 receives the handle portion 201 of the straight pipe wrench 200 shown in FIG. 3, which can be formed by a part of the saddle portion 27. In this case, the second support portion 27 may also form the receiving groove 28 (FIG. 4) similarly to the first support portion 25. The first bearing portion 25 and the second bearing portion 27 are arranged at a predetermined interval in the pipe axial direction. In order to reduce the size of the receiver 21 as a whole, it is preferable that this distance be as small as possible. The receiving tool 21 moves in the same direction when the carriage 9 moves in the axial direction as the joint T is tightened or loosened.

As shown in FIG. 5, the offset pipe wrench 100 can adjust the distance between the pair of jaws 103a and 103b in a direction orthogonal to the longitudinal direction of the handle 101, and is suitable for a narrow work site or the like. On the other hand, the straight pipe wrench 200 is an ordinary pipe wrench, and the distance between the pair of jaws 203a and 203b is adjusted in the same direction as the longitudinal direction of the handle 201. The offset pipe wrench 100 and the straight pipe wrench 200 themselves are publicly known and are not the direct object of the present invention, and thus detailed description thereof will be omitted. The offset pipe wrench 100 and the straight pipe wrench 200 are in a normally mounted state, and generally, as is apparent from FIGS. 3 and 5, the height positions of the handle portions 101 and 201 are different. Therefore, in the illustrated embodiment, the height position of the second support portion 25 (from the saddle) is higher than the height position of the first support portion 27. Of course, the height position is appropriately designed according to the target pipe wrench.

According to the receiver 21 configured as described above, a receiver for both the offset pipe wrench 100 and the straight pipe wrench 200 can be realized. The type of pie plench targeted is not particularly limited. When it is used also for two or more types of pipe wrenches, the third and lower bearings need only be arranged in the axial direction in the same manner as the second bearing or the first bearing.

FIGS. 3 and 4 show a single pipe wrench holder 21 A for the straight pipe wrench 200. The figure shows a case where the present invention is applied to a receiver for only the straight pipe wrench 200. Also in this figure, the receiving member 21A basically has a saddle portion 23 having a circular concave surface 29 that fits tightly into the guide bar 8 or has a curvature larger than the maximum diameter of the guide bar 8 of the threading machine to be applied. And a support portion 27 (corresponding to the second support portion in FIGS. 1 and 2) having a receiving groove 28 for receiving the handle 201 of the straight pipe wrench 200. Although the saddle portion 23 is placed on the guide bar 8 in FIGS. 3 and 4, it may be placed on the carriage 9 as in the previous embodiment. In the embodiment shown in FIGS. 3 and 4, the receiver 21A slides on the guide bar 8 as the joint T is tightened or loosened.

5 and 6 show a single pipe wrench receiver 21 B for the offset pipe wrench 100. The figure shows a case where the present invention is applied to a receiver only for the offset pipe wrench 100. Also in this figure, the receiving member 21B basically has a supporting portion 25 having a saddle portion 23 that engages with the protrusion 9b of the carriage 9 and a receiving groove 26 that receives the handle 101 of the offset pipe wrench 100 (see FIGS. 1 and 2). (Corresponding to the 1st bearing section in). 5 and 6, the saddle portion 23 has a block shape, and a pair of grooves 23a that fit into the pair of protrusions 9b of the carriage 9 are formed on the lower surface thereof. Lateral holes 23b are formed in these grooves 23a, and the corresponding projections 9b of the carriage 9 are fitted into the grooves 23a of the receiving member 21B from above, and then, for example, a thumbscrew 41 is inserted into the lateral hole 23b. The receiver 21B can be fixed to the carriage 9 by pressing the tip of the lever against the side wall of the protrusion 9b. In the embodiment shown in FIGS. 5 and 6, the receiving member 21B moves in the axial direction together with the carriage 9 as the joint T is tightened or loosened. When using a threading machine to perform tightening work, read the current value of the spindle motor and stop the spindle motor when the current value reaches a specified value, and then join the pipe and joint with an appropriate tightening force. it can.

[0020]

[Effect of device]

 As described above, according to the present invention, the receiver of the pipe wrench can be easily attached to and detached from the carriage or the guide bar of the threading machine, so that the handle or the guide bar of the pipe wrench can be used. It can be prevented from being damaged. Further, according to the present invention, one receiving device can be used for at least two types of pipe wrenches such as a straight pipe wrench and an offset pipe wrench, and its practical convenience is great.

[Brief description of drawings]

FIG. 1 is a perspective view showing a dual-purpose pipe wrench receiver according to the present invention attached to a carriage.

FIG. 2 is a perspective view showing the dual-purpose pipe wrench receiver according to the present invention before being attached to the carriage.

FIG. 3 is a perspective view showing a single pipe wrench receiver for a straight pipe wrench according to the present invention, which is attached to a guide bar of a carriage.

FIG. 4 is a perspective view showing a single pipe wrench holder for a straight pipe wrench according to the present invention before being attached to a guide bar of a carriage.

FIG. 5 is a perspective view showing a single pipe wrench holder for an offset pipe wrench according to the present invention, which is attached to a carriage.

FIG. 6 is a perspective view showing a single pipe wrench holder for an offset pipe wrench according to the present invention before being attached to a carriage.

FIG. 7 is a schematic external view showing a general configuration of a screw cutting machine to which the present invention is applied.

[Explanation of symbols]

 1 ... Base 2 ... Chuck 8 ... Guide bar 9 ... Reciprocating table 21, 21A, 21B ... Receiving tool 23 ... Saddle part 25, 27 ... Bearing part P ... Pipe T ... Joint

Claims (5)

[Scope of utility model registration request] 1. A guide bar (8) extending in a direction parallel to an axis of a pipe to be held by a chuck (4) of a threading machine body, or a carriage (9) movably supported by the guide bar. A pipe wrench holder (21, 21A, 21B) detachably attached to a saddle part (23) to be placed on a guide bar or a carriage and a handle part (101) of the pipe wrench (100, 200). , 20
1) A pipe wrench receiver for a threading machine, characterized in that it has a bearing part (25, 27) to receive. 2. The pipe wrench receiver comprises at least two bearing portions (25) arranged in parallel in the axial direction of the pipe to be processed to receive the handle portions (101, 201) of at least two types of pipe wrenches (100, 200). , 27). The pipe wrench receiver according to claim 1, further comprising: 3. A pipe wrench receiver according to claim 2, characterized in that at least one of the at least two bearing parts is formed as a receiving groove (26). 4. The pipe wrench receiver according to claim 2, wherein the at least two bearing portions have different height positions from the saddle portion. 5. A positioning engagement portion (3) which engages with a corresponding portion of the carriage to limit movement of the pipe to be processed in the axial direction.
The pipe wrench receiver according to claim 2, wherein 1) is provided.