JPH0663237U - Clevis desorption device for cylinder - Google Patents

Abstract

(57) [Summary] [Purpose] To facilitate the attachment and detachment of the clevis of the cylinder. [Structure] A slide portion that moves forward and backward while being held by a rail provided on a pedestal, and a rotation shaft whose shaft center is axially supported by a support portion above the slide portion in parallel with the moving direction of the slide portion. A clevis holding mechanism 7 for connecting the clevis in a state where the axis of the piston rod is aligned with one end of the rotating shaft,
A clamp device arranged in parallel with the clevis holding mechanism 7 for holding a piston rod or a lock nut, and a rotary shaft drive means composed of a hydraulic wrench removably connected to the other end side of the rotary shaft were provided. Clevis desorption device for cylinders. [Effect] It can be used not only for clevis but also for desorption of other objects.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a clevis attachment / detachment device used when attaching / detaching the clevis of a clevis type cylinder when disassembling and assembling the cylinder.

[0002]

[Prior art]

 Generally, the work of removing and installing the clevis, which is screwed to the tip of the piston rod of a hydraulic or pneumatic cylinder, is done only by human power for lightweight items, but there is a danger for heavy items. While holding it, the clevis is screwed into or removed from the tip of the piston rod by applying a rotational force to the clevis using a rope or the like.

As a device for attaching and detaching a nut screwed into such a heavy clevis or piston rod, there is one based on the technique described in Japanese Utility Model Laid-Open No. 172525/1987. Based on this technology, the device that removes the nut that is screwed into the cylinder head and piston rod fits the nut to the ratchet device adapter while holding the piston rod so that it does not rotate. This is a device in which the ratchet device is rotated by the drive cylinder connected to and the nut is attached and detached.

There is also one based on the technique described in Japanese Patent Laid-Open No. 2-71938. Based on this technology, the device for removing the tightening nut for fixing the piston, or for removing the cylinder head that is assembled to the cylinder tube, inserts a spanner into the nut at the piston rod end and the cylinder head of the cylinder tube, and A drive cylinder connected to the handle gives rotational force to the wrench to remove and attach nuts.

Further, there is one based on the technique described in JP-A-62-130140. The clevis attachment / detachment mechanism based on this technology consists of a clamp mechanism and a rotatable clevis clamp mechanism.The clevis clamper that holds the clevis of the clevis clamp mechanism is rotated by a drive motor to remove the clevis. To do.

[0006]

[Problems to be solved by the device]

 However, the above-described conventional clevis or nut attaching / detaching device has the following problems. In other words, since a hydraulic cylinder or electric motor is used for the mechanism that clamps and rotates the clevis or nut, the device becomes large and difficult to use, and it can be easily moved. Since it does not exist, there is a problem that it cannot be used for multiple purposes.

This invention was made in order to solve the above-mentioned problems of the prior art, and since the rotating means used for attaching and detaching the clevis can be detached, the device can be made compact. Another object of the present invention is to provide a clevis attachment / detachment device for a cylinder that can be moved and used for various purposes.

[0008]

[Means for Solving the Problems]

 The clevis attachment / detachment device for a cylinder according to the present invention comprises a slide part that moves forward and backward while being held by a rail provided on a pedestal, and a shaft center on a support part above the slide part parallel to the moving direction of the slide part. A clevis holding mechanism that connects a rotatably supported rotating shaft to a clevis in a state where the axis of the piston rod is aligned with one end of the rotating shaft, and a clevis holding mechanism that is installed in parallel with the clevis holding mechanism to clamp a piston rod or a lock nut. And a rotary shaft drive means composed of a hydraulic wrench removably connected to the other end of the rotary shaft.

[0009]

[Action]

 When attaching and removing the clevis using the clevis removing device for a cylinder according to the present invention, place this removing device in front of the cylinder for removing the clevis and clamp the piston rod or lock nut from both sides with the clamping device. At the same time, hold the clevis with the clevis holding mechanism so that the axis of the rotating shaft and the axis of the piston rod are aligned. Then, after making such a state, a hydraulic wrench is attached to one end of the rotary shaft, and the clevis and the rod are rotated in a direction in which the screw is fitted or loosened. At this time, the piston rod or lock nut is clamped so that it cannot rotate, and the clevis can be easily removed.

In the clevis attachment / detachment device for a cylinder according to the present invention, since the rotation mechanism for attaching / detaching the clevis is removable, there is no need to take up a large installation space, it is easy to use, and the attachment / detachment device can be moved laterally. It can be used for other purposes.

[0011]

【Example】

 A cylinder clevis attachment / detachment device according to an embodiment of the present invention will be described with reference to FIGS. 1A is an overall front view, FIG. 1B is a side view, and FIG. 2 is a side view of a clamp device that holds a piston rod or a lock nut. This device includes a sliding portion 3 that moves forward and backward along the rail 2 while being held by a rail 2 provided on a pedestal 1, and a bearing portion 5 to a supporting portion 4 located above the slide portion 3. And a clevis holding mechanism 7 connected to one end 6a of the rotating shaft 6, the rotating shaft 6 having a shaft center parallel to the moving direction of the slide portion 3, and the holding mechanism 7 on the gantry 1. Clamping device 8 arranged in parallel with each other to clamp piston rod 32 or lock nut 33 from both sides so as not to rotate, and a removable hydraulic wrench 9 connected to the other end 6b of rotating shaft 6. Has been done. 1A and 1B, the reaction force due to the rotational force of the hydraulic wrench 9 is received by the reaction force receiving plate 9a. Further, in FIG. 1 (b), reference numeral 10 is a needle bearing, and the slide portion 3 can be easily moved by human power.

The clevis holding mechanism 7 is composed of a box-shaped frame connected to the one end 6 a of the rotary shaft 6 via a flange 11, and the side opposite to the side surface connected to the flange 11. The opening 12a is provided in the. By inserting the clevis 31 of the cylinder into the opening 12a, the rotary shaft 6, the clevis 31 and the piston rod 32 are linearly connected. A through hole 12c having the same diameter as the pin hole of the clevis 31 is provided in the front surface side of the box-shaped frame body and the side surface portion 12b facing each other. On both sides 12d of the box-shaped frame, which face each other on the upper surface side and the lower surface side, one female screw hole penetrating in the vertical direction is provided, and the position of the clevis 31 inserted into the opening 12a is adjusted. The respective male screws 13 are screwed in.

Further, the clamp device 8 includes a pair of support members 14 arranged on the pedestal 1 so as to face each other, and a screw shaft 15 which is screwed in the support members 14 in a horizontal direction and is capable of projecting and retracting so as to face each other. Guide shafts 16 that come in and go out oppositely along the through holes of the respective support members 14, respective screw shafts 15 and clamp heads 17 integrally fixed to the tips of the guide shafts 16 and handles 18 of the screw shafts 15. It consists of and. In FIG. 2, what is clamped by the clamp head 17 is not the piston rod 32 itself but the lock nut 33 used so that the clevis 31 does not come out of the piston rod 32.

FIG. 3 is an explanatory view showing a state in which the piston rod 32 is clamped by the pair of clamp heads 17. However, a portion of the clamp head 17 that clamps the piston rod 32 has a recess 19 a. The removable adapter 19 is used.

FIG. 4 is an explanatory view showing a state in which the clevis 31 is held by the clevis holding mechanism 7, and a set pin 20 having a brim portion 20a at one end and a male screw portion 20b at the other end is provided. , Which is inserted so as to penetrate both the pin hole 31a of the clevis 31 and the through hole 12c provided in the side surface portion 12b of the box-shaped frame, and which connects the clevis 31 and the clevis holding mechanism 7. The nut 21 is screwed and fixed to the male screw portion 20b.

When holding the clevis 31 in such a state, if the center axis of the clevis 31 and the center of rotation of the clevis holding mechanism 7 are deviated from each other, the clevis 31 cannot rotate smoothly. In such a case, the adjusting screw 13 screwed on the upper surface side and the lower surface side 12d of the box-shaped frame body is put in and taken out so that the central axis of the clevis 31 can rotate the clevis holding mechanism 7. Try to match the center.

In the above-described structure, the clevis 31 is held by the clevis holding mechanism 7 as described above, and the piston rod 32 or the lock nut 33 is held by the clamp device 8 so as not to rotate, so that the hydraulic wrench is held. When the rotating shaft 6 is rotated by 9 so that the clevis 31 is screwed, the clevis 31 is screwed into the male screw portion at the tip of the piston rod 32. At this time, as the screwing becomes deeper, the sliding portion 3 moves toward the piston rod 32 along the rail 2.

On the contrary, when the rotating shaft 6 is rotated so that the clevis 31 loosens, the clevis 31 comes out from the male screw portion at the tip of the piston rod 32. Then, as it slides out, the slide portion 3 moves along the rail 2 in a direction away from the piston rod 32.

Since the clevis desorption device for the cylinder of the embodiment of the present invention uses the removable hydraulic wrench as the rotating means as described above, the hydraulic cylinder or the electric motor is used as the rotating means like the conventional desorption device. Compared to the case of using it, the installation space is smaller, so it is easier to use and the rotating means can be removed, so it can be used by moving it from place to place. Can be used for

[0020]

[Effect of device]

 According to this invention, the clevis of the cylinder can be easily attached and detached, and the device can be used for various purposes.

[Brief description of drawings]

FIG. 1A is a front view of a cylinder clevis attachment / detachment apparatus according to an embodiment of the present invention, and FIG. 1B is a side view of a cylinder clevis attachment / detachment apparatus according to an embodiment of the present invention.

FIG. 2 is a side view of a lock nut clamp device for a piston rod.

FIG. 3 is an explanatory view showing a state in which a piston rod is clamped by a clamp head.

FIG. 4 is an explanatory diagram showing a state in which a clevis is held by a clevis holding mechanism.

[Explanation of symbols]

 1 cradle 2 rail 3 slide part 4 support part 5 bearing 6 rotary shaft 6a one end of rotary shaft 6b other end of rotary shaft 7 clevis holding mechanism 8 clamp device 9 hydraulic wrench 9a reaction force receiving plate 10 needle bearing 11 flange 12a opening 12b Side surface side 12c Female screw hole 12d Upper surface side and lower surface side 13 Male screw 14 Support member 15 Screw shaft 16 Guide shaft 17 Clamp head 18 Handle 19 Adapter 20 Set pin 20a Collar portion 20b Male screw portion 21 Nut

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshihisa Hirata 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nihon Steel Pipe Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A slide portion that moves forward and backward while being held by a rail provided on a gantry, and a rotary shaft having a shaft center axially supported by a support portion above the slide portion in parallel with the moving direction of the slide portion. A clevis holding mechanism that connects the clevis in a state where the axis of the piston rod is aligned with one end side of the rotating shaft; a clamp device that is arranged in parallel with the clevis holding mechanism and holds the piston rod or the lock nut; A clevis attachment / detachment device for a cylinder, comprising: a rotation shaft drive means configured by a hydraulic wrench detachably connected to the other end side of the rotation shaft.