JP2012184823A - Turnbuckle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a turnbuckle having a structure which enables an adjusting rod to be quickly fitted into the inside of a bearing by forming a notch in the bearing and causes no risk that the adjusting rod comes off from the notch.SOLUTION: In the turnbuckle, a constitution is made in which an adjusting screw shaft 13 is connected with a screw to the bearing 12 provided at one end of an operating frame 11, the adjusting rod 15 with projections 16 at a predetermined pitch is inserted in the bearing 14 of the other end, and a locking pawl 17 is formed in the bearing 14 with respect to the projections 16, an insertion part 23 of the adjusting rod 15 and a pocket part 25 having a diameter larger than that of the insertion part 23 are formed in the inside of the bearing 14, the notch 26 having the width fitted to the diameter of the adjusting rod 15 is so formed that the adjusting rod 15 can be gotten in and out in the radial direction in the inside of the bearing 14, and the locking pawl 17 is formed at the side opposite to the notch 26 in the radial direction.

Description

  The present invention relates to a turnbuckle, and more particularly to a so-called knob type turnbuckle.

  The basic structure of the turnbuckle is that the bearings provided at both ends of the operating frame are provided with screw holes that are mutually opposite screws in a coaxial state, and screw shafts that fit the screw holes respectively, that is, reverse to each other. This is a configuration in which a screw shaft for adjustment to be a screw is screwed so as to be able to advance and retract.

  The turnbuckle adjusts the distance between the screw shafts by rotating the operation frame while the screw shafts are supported so that they cannot rotate and advance / retract, so that both screw shafts move forward and backward so that they approach or separate from each other. can do. However, since the adjustment pitch in this case depends on the pitch of the screw shaft, it is not suitable for adjusting a long distance.

  On the other hand, as disclosed in Patent Document 1, the knob type turnbuckle is provided with a screw hole in a bearing portion at one end portion of an operation frame, and an adjustment screw shaft is screwed in such a manner that the adjustment screw shaft can be moved forward and backward. Is similar to the conventional case, but the bearing at the other end is provided with an axial bearing hole instead of the conventional screw hole, and a plurality of knob-shaped protrusions at a constant pitch instead of the screw shaft. An adjustment rod provided with is used.

  An engaging frame integral with the lever faces the bearing hole so as to swing freely, and the engaging frame is engaged with the protruding portion of the adjusting rod inserted through the bearing hole, thereby preventing the adjusting rod from coming out. It is like that.

  In the knob type turnbuckle, the length of the adjusting rod is largely adjusted in units of pitch between the protrusions and locked at a predetermined position, and then the operation frame is operated to adjust the screw pitch by one screw shaft. Since this knob type turnbuckle can take a large adjustment pitch, there is a convenience that the time for operating the operation frame is shortened.

Japanese Patent Laid-Open No. 5-296297 (see FIGS. 5 and 6)

  However, when the adjustment rod is long, for example, a hook provided at the tip of the adjustment rod is configured to be directly engaged with an object to be secured such as a container so that the adjustment rod can also function as a lashing bar. In such a case, since the adjustment rod is long, it is necessary to insert it into or remove it from the operation frame, which is often inconvenient in the lashing operation.

  As a countermeasure, a configuration in which a groove-like notch having a width equal to or larger than the diameter of the adjusting rod is provided in the bearing hole in the radial direction, and the adjusting rod is taken in and out of the bearing through the notch. According to this configuration, it is not necessary to insert and remove the adjustment rod in the axial direction, and the adjustment rod can be fitted into the bearing simply by fitting in the radial direction from the notch.

  However, if there is a notch as described above in the bearing part, for example, when used in a container loaded on a ship, the adjustment rod may come out of the notch when tightening is loosened by vibration or impact. There is. In addition, the adjustment rod may come off from the notch during the lashing operation.

  As a countermeasure against this, there is a structure in which an opening / closing arm biased by a spring is provided in the notch, and after the adjustment rod is inserted, the notch is closed by closing the opening / closing arm to prevent the adjustment rod from coming off. Conceivable. However, when such an opening / closing arm is provided, an operation for opening / closing the opening / closing arm is required.

  In view of this, the present invention enables the adjustment rod to be quickly fitted into the bearing by providing the notch portion in the bearing portion, and has a high safety without the possibility of the adjustment rod being detached from the notch portion. The objective is to provide a turnbuckle.

  In order to solve the above-described problems, the present invention provides an operation frame, an adjustment screw shaft that is threadably coupled to a bearing portion provided at one end portion of the operation frame, and a forward and backward movement to the bearing portion at the other end portion. The other end of the turnbuckle comprising an adjustment rod that is inserted into the projection and provided with a protrusion at a predetermined pitch, and a lock claw that is provided on the bearing of the other end and is detachable from the protrusion. In the bearing portion, there are provided an insertion portion for the adjustment rod, and a pocket portion for fitting the protrusion through a stepped portion that expands in the diameter increasing direction on the inner side in the axial direction from the insertion portion. The width of the adjusting rod is adapted to the diameter of the adjusting rod, and the adjusting rod is provided with a notch portion that can be inserted and removed in the radial direction, and the lock claw is provided on the opposite side of the notch portion in the radial direction. Is adopted.

  The turnbuckle having the above-described configuration is used for lashing containers and the like, the adjustment screw shaft side is connected and fixed to a lashing bridge, the lashing bar is connected to the tip of the adjustment rod, and the tip of the lashing bar is connected to an object such as a container. It is used by engaging with. The adjusting rod may also be used as a lashing bar. In this case, a long adjusting rod is used, and the tip of the adjusting rod is directly engaged with an object such as a container.

  In any case, since the inside of the bearing portion is opened to the outside by the notch, the adjustment rod can be fitted into the bearing in the radial direction from the notch. Then, the operating frame is rotated and tightened, so that the protrusion of the adjustment rod is fitted into the pocket of the bearing and is simultaneously locked by the action of the locking claw.

  The lock prevents the adjustment rod from moving in the length direction, and the width of the notch allows the adjustment rod to be inserted and removed in the radial direction. Since it cannot be done, it is also prevented that the protrusion protrudes from the notch. Furthermore, when the protrusion is inclined together with the adjustment rod, the inclination is restricted by the presence of the lock claw protruding inside the pocket portion.

  As described above, according to the present invention, since the bearing portion is opened to the outside by the notch portion provided in the bearing portion, the operation of fitting the adjustment rod inside the bearing can be performed quickly. Moreover, the lock rod is locked to prevent the adjustment rod from moving in the axial direction, and the protrusion of the adjustment rod is also prevented from coming out of the notch. This eliminates the possibility of the adjustment rod coming off from the operation frame during conveyance or work, and provides high safety.

Fig.1 (a) is a front view of the turnbuckle which concerns on embodiment, FIG.1 (b) is a partially expanded vertical front view of Fig.1 (a). FIG. 2 is a cross-sectional view taken along line X1-X1 of FIG. FIG. 3 is a rear view showing a part of the above. 4A is an enlarged cross-sectional view taken along line X2-X2 in the locked state of FIG. 3, and FIG. 4B is an enlarged cross-sectional view taken along line X2-X2 in the unlocked state.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  As shown in FIG. 1, the turnbuckle of the present invention includes an operation frame 11, an adjustment screw shaft 13 that is threadably coupled to a bearing portion 12 provided at one end of the operation frame 11, and the other end. The adjustment rod 15 is inserted into the bearing portion 14 so as to be able to advance and retreat, the protrusion 16 provided on the adjustment rod 15 at a predetermined pitch, and the lock claw 17 (see FIG. 3) that can be engaged with and disengaged from the protrusion 16. , See FIG. 4), which is a knob type turnbuckle.

  The operation frame 11 is obtained by connecting and integrating two central target portions of two bearing portions 12 and 14 that are coaxially opposed to each other with a predetermined interval by two right and left operation rods 18. . In order to reinforce the operation frame 11, the intermediate portions of the operation rod 18 may be connected by a reinforcing bridge.

  An adjustment screw shaft 13 is screwed to one bearing portion 12 so as to be movable back and forth in the axial direction. A bifurcated connecting portion 19 is provided at one end of the screw shaft 13 and a connecting pin 21 is inserted therethrough. Further, a stopper 22 is provided on the screw shaft 13 between the connecting portion 19 and the bearing portion 12 to restrict a relative movement of the operation frame 11 relative to the screw shaft 13 beyond a certain level.

  As shown in FIG. 1B, the other bearing portion 14 has an insertion portion 23 of the adjustment rod 15 in the axial direction and a stepped portion that extends in the diameter increasing direction on the inner side in the axial direction from the insertion portion 23. A pocket portion 25 for fitting the protruding portion 16 of the adjusting rod 15 is provided through 24. The insertion portion 23 is opened outward in the axial direction of the bearing portion 14 (upward in FIG. 1), and the pocket portion 25 is opened inward in the axial direction of the bearing portion 14 (downward in FIG. 1).

  As shown in FIG. 2, the bearing portion 14 is provided with a groove-shaped notch 26 across the insertion portion 23, the step portion 24, and the pocket portion 25. The planar shape of the insertion part 23 is a semicircular shape, and a notch part 26 having the same width as the diameter thereof is continuously provided in the insertion part 23. The diameter of the insertion part 23 and the width W of the notch part 26 equal to the diameter of the insertion part 23 are formed to be equal to the diameter of the adjustment rod 15 or as large as considering the fitting gap.

  The pocket portion 25 is formed larger in diameter than the insertion portion 23 by the width of the step portion 24. Since the width of the notch 26 is smaller than the diameter of the pocket 25, the pocket 25 has engaging recesses 20 having a radial width b on both sides of the notch 26 as shown in FIG. To do. Due to the presence of the engagement recess 20, the protrusion 16 fitted in the pocket portion 25 is prevented from coming out radially outward from the notch portion 26.

  As shown in FIGS. 2 to 4, a mounting member 27 is fixed along the outer surface of the bearing portion 14 on the side opposite to the notch 26 in the radial direction, and a lock claw 17 is provided on the mounting member 27. It is done. As shown in FIG. 2, the mounting member 27 is fixed to the left and right operating rods 18 by fixing arms 28 that are bent in a U shape in plan view and project on both sides. As shown in FIG. 4, the attachment member 27 has an upper end portion in the middle of the bearing portion 14, and a lower end portion that extends below the lower end of the bearing portion 14 (position approaching inward in the axial direction) in the axial direction. A window hole 29 is provided in the middle portion.

  The lock claw 17 is disposed on the inner surface of the mounting member 27 and is mounted so as to be swingable in the radial direction of the bearing portion 14 by support pins 31 inserted and fixed on both side portions of the mounting member 27 at a position lower than the bearing portion 14. The length of the lock claw 17 is such that the lower end portion 32 is exposed below the mounting member 27 and the exposed portion serves as an operation portion from the outside. The upper end portion of the lock claw 17 is formed to have a length that reaches the inside of the pocket portion 25.

  In order to avoid interference with the wall surface of the bearing portion 14 when the lock claw 17 swings, a notch recess 33 is provided in the lower end portion of the bearing portion 14.

  The fixed end of the helical spring 34 inserted through the support pin 31 is pressed against the inner surface of the mounting member 27, and the free end is engaged with the back surface of the lock claw 17. Thereby, the lock claw 17 is always urged inward in the radial direction, and is engaged with the engagement portion 36 provided at the lower end portion of the protrusion 16 of the adjustment rod 15 (see FIG. 4A). Thereby, the adjustment rod 15 is locked. Further, when the lower end portion 32 is operated and pushed inward, the lock claw 17 is disengaged from the engagement portion 36 against the elasticity of the helical spring 34 and releases the lock (see FIG. 4B). .

  The lock claw 17 is covered with an attachment member 27, so that there is no risk of peripheral members hitting the lock claw 17 during work or the like.

  As shown in FIG. 1, the adjustment rod 15 is provided with a plurality of protrusions 16 at a constant pitch from the lower end thereof (the end on the side inserted through the operation frame 11). The protrusion 16 has an inverted conical trapezoidal shape, and the diameter of the lower end of the protrusion 16 is slightly larger than the diameter of the adjustment rod 15, and the difference in diameter is the engaging portion 36 of the lock claw 17. An upper end portion of the protrusion 16 is formed to have a larger diameter than the adjustment rod 15 and engages with the step portion 24 of the pocket portion 25.

  The adjustment rod 15 is prevented from coming out of the operation frame 11 outward in the axial direction when the upper end portion of the protrusion 16 is engaged with the step portion 24 of the pocket portion 25. Inward in the axial direction can move freely in the unlocked state (see FIG. 4B), but in the locked state in which the lock claw 17 is engaged with the engaging portion 36 of the protrusion 16. Axial inward movement is prevented.

  When the adjustment rod 15 is fitted to the bearing portion 14, the tip end of the lock claw 17 urged inward in the radial direction hits the inclined surface of the protrusion 16, and the lock claw 17 is engaged below the lock claw 17. A slight gap a is provided in the axial direction between the protrusion 16 and the stepped portion 24 in order to solve the problem that the portion 36 cannot be engaged. By pulling up the adjustment rod 15 by the gap a, the tip of the lock claw 17 falls into the engagement portion 36. The lock claw 17 can be engaged with the engagement portion 36 upward from obliquely downward, so that the adjustment rod 15 can be reliably locked.

  In the locked state, the lower end 32 of the lock claw 17 hits the inner surface of the mounting member 27 and is restricted from rotating further deeper. Therefore, even when the protrusion 16 provided at the lowermost end of the adjustment rod 15 is fitted into the pocket 25, the tip of the lock claw 17 is on the lower surface of the protrusion 16 at the same position as the engagement portion 36. The corner portion can be engaged upward from the diagonally lower side.

  As described above, the width of the notch portion 26 of the bearing portion 14 is equal to or slightly larger than the diameter of the adjustment rod 15 and is narrower than the maximum diameter portion of the protrusion 16. On the other hand, even if an external force that is pulled out in the radial direction is applied, the protruding portion 16 is engaged with the engaging recess 20 on the inner wall surface of the pocket portion 25, so that it does not come out. Even if the adjustment rod 15 is inclined in the gap a between the pocket portion 25 and the protrusion 16, the movement of the protrusion 16 is restricted by the lock claw 17, so that the adjustment rod 15 may be inclined more than a certain amount. Is prevented.

  A hook 37 is swingably attached to the upper end of the adjustment rod 15 (the end far from the operation frame 11) by a pin 38. Since the center of gravity of the hook 37 is off from the center of the adjustment rod 15, the hook 37 is in a state of being tilted with respect to the adjustment rod 15 in a natural state. This is because the convenience of work when engaging the hook hole of the object to be secured such as a container in the case where the lashing bar is also used by the adjustment rod 15 is taken into consideration.

  When the adjustment rod 15 is used as an original adjustment function member and a lashing bar is connected to the tip of the adjustment rod 15, the adjustment rod 15 may be shorter than that shown in the figure, and the engagement hook is attached in an upright state. Things can be used.

  The embodiment of the present invention is as described above. Next, a lashing operation when the adjusting rod 15 is also used as a lashing bar will be described.

  Usually, the screw shaft 13 is screwed to one bearing portion 12 of the operation frame 11, and the adjustment rod 15 is separated from the operation frame 11. When used for lashing containers loaded on a ship, the connecting pin 21 of the connecting portion 19 of the screw shaft 13 is connected to a mooring bracket provided on a lashing bridge on the deck. The hook 37 of the adjustment rod 15 is engaged with the hook hole at the top of the container, and the adjustment rod 15 is fitted to the bearing portion 14 at the upper end of the operation frame 11 in the radial direction from the notch portion 26.

  At this time, when the protrusion 16 is at the position of the notch 26, the operation frame 11 is rotated to move the position of the protrusion 16 away from the notch 26, and the rod portion between the protrusions 16 is notched. 26.

  After that, when the operation frame 11 is rotated and the operation frame 11 is moved downward with respect to the screw shaft 13, the protrusion 16 moves relative to the operation frame 11, pushes the lock claw 17 away, and fits into the pocket portion 25. Match. When the upper end of the protrusion 16 enters the range of the gap a, the tip of the lock claw 17 falls into the engagement portion 36 to lock the adjustment rod 15. The lock prevents the adjustment rod 15 from moving downward. Further, a certain inclination or more in the direction of the notch 26 of the protrusion 16 is also restricted.

  When the rotation of the operation frame 11 further proceeds and the protrusion 16 is strongly pressed against the stepped portion 24 of the pocket portion 25, the adjustment rod 15 serving also as a lashing bar is tensioned and the container is secured. During or after the lashing operation, whether or not the lock is securely performed can be checked by visual observation through a window hole 29 provided in the attachment member 27.

  When the lock is released, the lower end 32 of the lock claw 17 is pushed in to retract the tip of the lock claw 17 from the projection 16 (see FIG. 4B).

DESCRIPTION OF SYMBOLS 11 Operation frame 12 Bearing part 13 Screw shaft 14 Bearing part 15 Adjustment rod 16 Projection part 17 Locking claw 18 Operation rod 19 Connection part 20 Engagement recessed part 21 Connection pin 22 Stopper 23 Insertion part 24 Step part 25 Pocket part 26 Notch part 27 Mounting member 28 Fixed arm 29 Window hole 31 Support pin 32 Lower end portion 33 Notch recess portion 34 Spring spring 36 Engagement portion 37 Hook 38 Pin

Claims (7)

  An operation frame, an adjustment screw shaft that is threadably coupled to a bearing portion provided at one end portion of the operation frame, and a projection portion that is inserted through the bearing portion at the other end portion so as to be freely advanced and retracted at a predetermined pitch. In the turnbuckle comprising an adjustment rod and a lock claw provided on the bearing portion at the other end and detachable from the protrusion, the insertion portion of the adjustment rod is inserted into the bearing portion at the other end. And pocket portions for fitting the protrusions through stepped portions that expand in the diameter increasing direction on the inner side in the axial direction from the insertion portion, and the bearing portion has a width that matches the diameter of the adjustment rod. The turnbuckle is characterized in that a cutout portion is provided in which the adjustment rod can be inserted and removed in the radial direction, and the lock claw is provided on the opposite side of the cutout portion in the radial direction.   The turnbuckle according to claim 1, wherein the adjusting rod also serves as a lashing bar.   When the protrusion is formed in an inverted conical trapezoid and is fitted in the pocket portion, the upper end surface of the protrusion hits the step surface, and the lock claw engages with the lower end portion of the adjustment rod. The turnbuckle according to claim 1, wherein the turnbuckle is locked.   3. The lock claw is supported by a mounting member fixed to the outer surface of the other bearing portion so as to be swingable and biased radially inward of the bearing portion. Turnbuckle as described in   The turnbuckle according to any one of claims 1 to 4, wherein a lock claw is covered by the attachment member.   The fixed gap is provided between the protruding portion and the stepped portion of the pocket portion in a state where the lock claw is engaged with an engaging portion provided at a lower end portion of the protruding portion. The turnbuckle according to any one of 1 to 5.   The turnbuckle according to any one of claims 1 to 6, wherein a window hole through which a portion of the lock claw can be visually observed is provided in the mounting member.

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