JPS60137598A - Jig for clamping pipe - Google Patents

Abstract

PURPOSE:To improve the sureness, efficiency and manpower lessening of a clamping operation as far as possible by changing over grasping pawls to the state of acting the grasping and to the state of releasing the grasping by the actuation of a cam mechanism. CONSTITUTION:When a cam plate 4A of a cam mechanism 4 is turned around the fulcrum shaft for rotation until the cam plate contacts with a stopper 4C, grasping pawls 2, 3 are turned around pins 2A, 3A via balls 2E, 3E and an adjusting mechanism 6 and are thus actuated to the state of acting grasping. A pipe P is then grasped and held by the V-shaped surfaces 2a, 3a for acting grasping of the grasping members 2C, 3C of the pawls 2, 3. When the cam plate 4A is turned to contact with a stopper 4D, the pawls 2, 3 are actuated into the state of releasing the grasping. The members 2C, 3C are exchangeable according to the diameter of the pipe.

Description

DETAILED DESCRIPTION OF THE INVENTION It is an object of the present invention to provide a tube clamp jig useful in butt welding tubes in various piping systems.

To explain in detail, for example, a part of the boiler system piping was damaged.
X. When replacement is required, the damaged part of the pipe is cut and removed over an appropriate length, and a new pipe is butt-welded to the cut part in the same manner as in various piping systems. It is often necessary to butt weld the pipes. At this time, conventionally, two types of tubes were connected concentrically.
Since the work was carried out by two people, one person was to butt and hold the tube with cI-1, and the other person was to temporarily attach the tube that had been butted and held, resulting in the following drawbacks.

(b) Labor costs are high because it is a two-person job.

(b) Since this kind of pipes are butted and held manually, the alignment of both pipes is time consuming and inaccurate, and the temporary attachment is also difficult due to slight shocks or small shocks caused by time, etc. Coupled with the fact that the tube axis is easily misaligned, this results in not only a decrease in butt welding efficiency but also a decrease in butt accuracy.

In addition, as a means to overcome these conventional drawbacks, the present user has developed a pipe clamping tool having the configuration described in (1) and (■) below.

(I) A screw mechanism with an operating lever that can move in and out in a direction perpendicular to the axis of the tube is installed in multiple sieves spaced at appropriate intervals in the longitudinal direction of the clamp frame. .

(II) The tips of the screw shafts of each of the screws (ta, W&) and the clamp frame portion corresponding to these screws are connected to each other by the above-mentioned relative proximity PX-movement in the orthogonal direction that accompanies the rotational operation of these screw mechanisms. Alternatively, a pair of claws are fixed to hold and fix the material in a state where the material is held almost together.

In this case, the two types of pipes with the same diameter can be easily and accurately aligned by one person, and the temporary attachment does not cause the center to shift due to slight vibrations or small impacts caused by time. Although this method has the advantage of reducing labor costs and improving matching accuracy, it requires a lot of effort to rotate the screw mechanism when clamping and releasing the clamp, and it also requires a lot of effort to rotate the screw mechanism when clamping and releasing the clamp. Since it takes a long time to hold it by hand, it is still unsatisfactory in terms of work efficiency and labor saving.

The pipe clamp jig according to the present invention has been further researched and developed in view of the above-mentioned circumstances, and its characteristic structure is that the pipe clamp jig is provided at a plurality of locations appropriately spaced in the longitudinal direction of the clamp 7° frame. A pair of claws are provided that can clamp and fix the tubes together or almost together by relatively close movement from a direction perpendicular to the core direction, and between these clamping claws and the clamp frame, there are clamping claws marked nrJ. 5J between the clamping state and the clamping release state! ! The main point is that a cam mechanism is provided to operate the machine.

The features and effects of the present invention are as follows.

<Function> (a) A number of pairs of clamping claws provided on the clamp frame can accurately butt and hold a plurality of pipes of the same diameter in a mutually aligned state.

(b) Switching between the clamping action state and the clamping release state of the clamping claws can be quickly performed by a one-touch operation such as a swinging operation of the cam mechanism, and by setting the cam shape and lever ratio of the cam mechanism, It is possible to reliably and firmly clamp and fix a plurality of tubes in abutting state while reducing the required operating force.

<Effects> Therefore, while achieving the same effects as the previously developed screw bone clamping jig (that is, lower labor costs, expanding the range of application, and improving butt accuracy), the clamp It has now become possible to ensure work reliability and efficiency, and to promote button labor savings as much as possible.

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

As shown in Figures 1 to 3, two types of pipes (P) with the same diameter
A clamp frame tl+, which is approximately U-shaped when viewed in the direction of the tube axis, is used to construct a pipe flang jig used when holding fils together in a state of mutual connection.
V-shaped clamping surfaces (2a) are provided at both ends in the longitudinal direction of the tube and are swingable around an axis parallel or substantially parallel to the tube axis direction.

Due to the relative proximity rocking of (3a), these two pipes fil,
A pair of claws (2) and (3) that can clamp and fix fPl together or almost together are pivotally attached, and these six pairs of clamping claws (2), (3), +2+, +31 and the clamp 7
The clamping claws +2) are provided between the frame Il+ and the frame Il+, respectively.
A cam mechanism (4) is provided that switches and operates +3+ between a clamping state and a clamping release state.

The clamp frame ill has an upper frame in the upper frame (I
A) and the lower frame part (IB) that can be attached and detached from it
It is composed of.

1 [I clamping claw +21, t3) includes claw wooden bodies (2B), (3B) which are pivotally attached to the clamp frame ill via pins (2A), (3A), and the V-shaped clamping member. Working surface (2a).

(3a), and the claw wood bodies (2B), (3B)
The clamping members (2C), (3C) to which the bolts (5) can be replaced with other types, and the claw members (2B), (3B) are elastically biased to the clamping action state. springs (2D) and (3D), and a ball (3E) that contacts the cam plate (4A) of the cam mechanism (4), and the claw zero body (gB), (3B). ) has a ball (2E) for the cam mechanism (4)K,
A mechanism (θ) that can adjust the contact position of (3E) is provided.

The 1f JU force mechanism (4) is connected to the clamp frame 11.
), the cam plate (4A) is rotatably supported on both sides by the boss portions (la) and (lb), which are shaped like 1, in both the frame portions (IA) and (IB) of the frame portions (IA) and (IB). A spring-pole positioning tool (4B) that can be elastically held in the pinch release operation position and a cam plate (4A)
stoppers (4C) and (4D) for abutting and preventing the rotation of the cam plate (4C) and the cam plate (4D) beyond the two operating positions;
A holding part (4F) for operating a tool such as a box wrench or spanner is formed on the upper part of the rotation fulcrum shaft (4E) in A).

The adjustment mechanisms +61, +61 are connected to the claw body (2B
), (3B) and a pole holding member (6b) screwed into these screw holes (6a), (6a).

(6b).

The clamping claws (21, +3+ clamping members (2C), (3C
) are replaced depending on the pipe diameter, but as shown in FIG. 4, when the pipe diameter is small, the holding members (2C),
Auxiliary holding members (2C') and (3C) may be attached via (3C).

Next, another embodiment will be described.

(a) As shown by the imaginary line in FIG. 1, attach the handle (5) to the crank frame I'll in a horizontal position.

(b) As shown in Fig. 5, the clamp frame Il+ is divided into parts in the direction of the tube axis, and these parts S reframe 81 Fixed and connected in a flexible manner in the direction of the core.

(c) As shown in FIG. 6, attach the clamping claws [21, +3+] to the V points in the longitudinal direction of the clamp frame ill, respectively.

) In the embodiment shown in FIG. 6, two pairs of clamping claws (2)
, +3+, +21, +31 are switched and operated by one cam mechanism (4).

(e) As shown in Fig. 7, a pair of j support members (2C)
, (3C), the clamping surface (2a) of one clamping member (2C) is parallel or almost parallel to the rotational axis of the cam plate (4A), and the clamping surface (2a) of the other clamping member (3C) is The clamping surface (3a) is divided into a surface portion (3al) parallel or almost parallel to the rotational axis of the cam plate (4A) and this surface portion (3al).
It consists of a surface portion (3aρ) that protrudes and slopes toward the one clamping member (2C) with respect to the clamping member (2C), so that the clamping action surface (2a) of the one clamping member (2C) and the clamping force of another force The pipe (Pl) is clamped and fixed at one point between the inclined clamping surface (3a) of the member (3C) and the clamping surface (la) of the clamp frame Ill.

According to this embodiment, when the cam mechanism (4) is operated to the clamping state, the pipe (P) always moves to the clamp frame +'
This has the advantage that the pipe (Pl) can be reliably fixed even if there is a backlash due to manufacturing tolerances or errors of the clamping claws 121, +31, etc.

[Brief explanation of drawings]

Figures 1 to 4 show an embodiment of the pipe clamp jig related to Kibatsuo, where Figure 1 is a front view, Figure 2 is a partially cutaway plan view,
FIG. 3 is a longitudinal side view, and FIG. 4 is a longitudinal side view showing another state of use. 5 to 7 show largely different embodiments, FIGS. 5 and 6 are roughly front views, and FIG. 7 is a longitudinal sectional side view. +11... ri 2nd frame, +21, +
31-°°°...Pinching claws, (2a), (3a) --
Clamping surface, (2D), (3D) ------- Tin ring, (4)... Cam mechanism, (5)...
・Handle, (6) ... , i1 scrap 11i Imo I] 1 piece, (P) ... ... pipe. Agent: Patent attorney: 1. Lishu FAT 3. 5. 6. 7 [4

Claims (1)

[Claims] ■ A plurality of clamp frames ll+ spaced apart appropriately in the longitudinal direction! 3! : A pair of claws capable of clamping and fixing the pipe fil in a comradely or almost comradely manner by moving relatively close to each other from a direction perpendicular to the axial direction of the pipe (P) at each location.
21, (:ll) are provided, and these clamping claws (21,
+31... and the clamp frame +11 are provided with a cam mechanism (4) for switching the clamping claws +21, +3+, between the clamping action position and the clamping release position. Ingredients. (1) The clamping claws +21, +31 are provided with V-shaped clamping surfaces (2a), (3a) and are configured to be swingable about an axis parallel or substantially parallel to the tube axis direction. The claws +21 and +31 are equipped with a mechanism (6) that can adjust the contact position with respect to the 13fJ writing mechanism (4). Pipe clamp jig. ■ A spring (2D) that elastically biases the clamping claws +21 and +31 and e described in 1a to a large clamping action.
, (3D)... The pipe clamp jig according to any one of claims 0 to 0. (2) The pipe clamp jig according to claim 0, wherein the clamp frame Ill is provided with a handle (6).