Compensation sleeve insertion and extraction aid and compensation sleeve extraction method

Abstract

A compensation sleeve insertion and extraction assisting tool is used when a compensation sleeve of a valve of a hydraulic elevator is inserted or extracted. The compensation sleeve insertion and extraction assisting tool has a connecting member whose one end side is connected to a top surface of the compensation sleeve and whose other end side extends in an extraction direction of the compensation sleeve, a plate member connected to the other end side of the connecting member and having an action surface portion extending in a direction intersecting the extraction direction, a fulcrum member provided so as to project from a housing fitting surface in the extraction direction, and an operation member whose tip portion is in contact with the action surface portion of the plate member as an action point, whose intermediate portion is in contact with the fulcrum member as a fulcrum, and whose base end portion is operated by an operator as a force point.

Description

Technical Field

[0001] This disclosure relates to techniques for pulling out or inserting compensation sleeves for valves in hydraulic elevators. Background Technology

[0002] Patent Document 1 discloses a sleeve extraction device. This sleeve extraction device includes a rod-shaped component. A tap portion is provided on the rod-shaped component, which forms an internal thread on the inner wall of the sleeve by engaging and rotating with it. Therefore, by rotating the rod-shaped component while it enters the inner side of the sleeve, the tap portion of the rod-shaped component engages with the sleeve threadedly. By pulling the rod-shaped component, which is engaged with the sleeve, out of the object, the sleeve pressed into the object is also pulled out of the object.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2018-20387 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] Sometimes, valves in hydraulic elevators are inspected. During valve inspection, there is a task of removing the compensating sleeve from the valve. In this task, as in the technology of Patent Document 1, after screwing a component such as a screw into the compensating sleeve, the screw and the compensating sleeve are pulled out together. However, sometimes it is difficult to pull out the firmly pressed-in compensating sleeve, and it can be a strenuous task for the operator. The same applies to the task of inserting the compensating sleeve into the valve.

[0008] This disclosure was made to solve the above-mentioned problems, and its purpose is to provide an auxiliary tool for inserting and removing compensation sleeves and a method for removing compensation sleeves, which can reduce the burden on operators in the operation of removing or inserting compensation sleeves of valves in hydraulic elevators.

[0009] Methods for solving problems

[0010] This disclosure discloses a compensating sleeve insertion and removal auxiliary tool for removing a compensating sleeve from a sleeve hole provided on the housing mating surface of a valve in a hydraulic elevator. The compensating sleeve insertion and removal auxiliary tool comprises: a connecting member, one end of which is connected to the top surface of the compensating sleeve, and the other end extending in the removal direction of the compensating sleeve; a plate member connected to the other end of the connecting member, having an actuating surface extending in a direction intersecting the removal direction; a fulcrum member protruding from the housing mating surface in the removal direction; and an operating member, the end portion of which serves as an actuating point and contacts the actuating surface of the plate member, the middle portion of which serves as a fulcrum and contacts the fulcrum member, and the base end portion of which serves as a force point and is operated by an operator.

[0011] Furthermore, this disclosure discloses a method for removing a compensating sleeve, used to remove a compensating sleeve from a sleeve hole provided on the housing mating surface of a valve in a hydraulic elevator using a compensating sleeve insertion and removal auxiliary tool. The compensating sleeve insertion and removal auxiliary tool includes: a fulcrum bolt; a connecting bolt having a threaded portion at one end and a head with a diameter larger than the threaded portion at the other end; a plate component having an active surface having a through hole with a diameter larger than the threaded portion and smaller than the head; and an operating component operated by a worker. The compensating sleeve removal method includes: The first step involves screwing the fulcrum bolt into the threaded hole on the mating surface of the housing; the second step involves screwing the connecting bolt into the threaded hole on the top surface of the compensating sleeve while it is inserted into the through hole, so that a gap is formed between the working surface and the top surface; the third step involves adjusting the engagement amount of the fulcrum bolt and the connecting bolt; and the fourth step involves using the end portion as the point of action to make the end portion contact the working surface of the plate component, using the middle portion as the fulcrum to make the middle portion contact the fulcrum bolt, and using the base end portion as the force point to apply force to the base end portion toward the mating surface of the housing.

[0012] Invention Effects

[0013] According to the compensating sleeve insertion and removal auxiliary tool disclosed herein, a lever can be formed by connecting parts, plate parts, fulcrum parts, and operating parts to pull the compensating sleeve in the removal direction. Therefore, even a compensating sleeve that is firmly pressed in can be pulled out with less force. As a result, the workload of operators is reduced. Attached Figure Description

[0014] Figure 1 This is a diagram showing the external structure of the valve of the insertion and removal auxiliary device in the application implementation method.

[0015] Figure 2 This is a diagram illustrating the component structure of a compensating sleeve insertion and removal auxiliary tool.

[0016] Figure 3 This is a diagram illustrating an installation example of the compensation sleeve insertion and removal auxiliary tool according to the implementation method.

[0017] Figure 4 This is an enlarged view showing an example of the installation of the compensation sleeve insertion and removal auxiliary tool according to the implementation method.

[0018] Figure 5 This is a diagram illustrating an operational example of the compensation sleeve insertion and removal auxiliary tool according to the implementation method. Detailed Implementation

[0019] Hereinafter, the embodiments will be described with reference to the accompanying drawings. Furthermore, common elements in all figures will be labeled with the same reference numerals, and repeated descriptions will be omitted.

[0020] Implementation method.

[0021] 1. The external structure of the valve in the compensating sleeve insertion and removal auxiliary tool according to the application implementation method.

[0022] Figure 1 This diagram shows the external structure of a valve in an application implementation of an insertion / removal auxiliary device. The valve 10 shown is a device for controlling the hydraulic pressure of a hydraulic elevator. A housing 12 is mounted to one side of the valve 10 via six mounting bolts 14. A compensating sleeve 16 is an internal structural component of the valve 10. If the housing 12 is removed, the top surface of the compensating sleeve 16, which is inserted into the sleeve hole, is exposed. In the following description, the direction in which the compensating sleeve 16 is pulled out of the sleeve hole is referred to as the "pulling-out direction".

[0023] 2. Structure of the compensation sleeve insertion and removal auxiliary tool in the embodiment

[0024] The valve 10 of the hydraulic elevator is regularly inspected by operators. Replacement components during inspection include the O-ring of the compensating sleeve 16. To replace this O-ring, the compensating sleeve 16 needs to be temporarily removed from the valve 10. A threaded hole is provided on the top surface of the compensating sleeve 16. The operator screws a bolt into the threaded hole and pulls the bolt in the pulling direction, thereby removing the compensating sleeve 16 from the sleeve hole. However, sometimes removing the firmly pressed-in compensating sleeve 16 can be difficult and may be a strenuous task for the operator.

[0025] The compensation sleeve insertion and removal auxiliary tool of this embodiment is a tool that assists in the operation of removing the compensation sleeve 16 during such maintenance work. Figure 2 This is a diagram illustrating the component structure of a compensating sleeve insertion and removal auxiliary tool. Figure 3 This is a diagram illustrating an installation example of the compensation sleeve insertion and removal auxiliary tool according to the implementation method. Figure 4 This is an enlarged view showing an example of the installation of the compensation sleeve insertion and removal auxiliary tool according to the implementation method. Figure 5 This is a diagram illustrating an operational example of the compensation sleeve insertion / removal auxiliary tool according to the embodiment. Hereinafter, appropriate reference will be made. Figures 2 to 5 The structure of the auxiliary tool for inserting and removing the compensating sleeve is explained.

[0026] The compensating sleeve insertion and removal auxiliary tool is composed of a connecting part 18, a plate part 20, a fulcrum part 22, and an operating part 30.

[0027] The connecting member 18 is a component used to install the plate component 20 from the top surface 161 of the compensating sleeve 16 in the pull-out direction with a gap. Typically, the connecting member 18 is a connecting bolt having a threaded portion 181 formed on one end and a head 182 formed on the other end. The threaded portion 181 is the part that engages with a threaded hole 162 provided on the top surface 161 of the compensating sleeve 16. That is, the threaded portion 181 has a thread diameter and pitch that can engage with the threaded hole 162. The head 182 is configured to have a diameter larger than that of the threaded portion 181. An example of such a connecting bolt is an M6 bolt. The compensating sleeve insertion and removal auxiliary tool of this embodiment has two connecting bolts as connecting members 18, but the number of connecting bolts may also be one.

[0028] Plate member 20 is an L-shaped angle member with a working surface 202 and a gripping surface 204 perpendicular to the working surface 202. The plate thickness of plate member 20 is, for example, 3 mm. Two through holes 206 are formed in the working surface 202. The diameter of the two through holes 206 is larger than the diameter of the threaded portion 181 of the connecting member 18 and smaller than the diameter of the head 182. In the case where the connecting member 18 is an M6 connecting bolt, the diameter of the through holes 206 is, for example, 7 mm. The distance between the two through holes 206 is the same as the distance between the two threaded holes 162 provided on the top surface 161 of the compensating sleeve 16. The gripping surface 204 is a part used to allow the operator to grip the plate member 20 by hand during operation. The shape and size of the gripping surface 204 are not limited. In addition, the gripping surface 204 is not a necessary structure.

[0029] Two connecting bolts, serving as connecting components 18, are screwed into two threaded holes 162 while being inserted into two through holes 206 of plate component 20. Thus, one end of connecting component 18, i.e., the threaded portion 181, is connected to the top surface 161 of compensating sleeve 16, and the other end, i.e., the head 182, is connected to plate component 20.

[0030] The plate member 20 is connected to the connecting member 18 with its working surface 202 intersecting the pull-out direction. A gap is formed between the working surface 202 and the top surface 161 of the compensating sleeve 16. The connecting member 18 has the function of adjusting the width of this gap by adjusting the amount of engagement with the threaded hole 162. Here, the gap is adjusted to be the width that allows the end portion 304 of the operating member 30 (described later) to be inserted.

[0031] The fulcrum member 22 is a member that protrudes in the pull-out direction by engaging with a threaded hole 104 provided on the housing mating surface 102. The threaded hole 104 can utilize the threaded hole for mounting the housing 12. In this case, the fulcrum member 22 can use the mounting bolt 14 as a fulcrum bolt. The engagement amount of the fulcrum member 22 is adjusted so that the protrusion amount from the housing mating surface 102 is above the height of the working surface 202 of the plate member 20 from the housing mating surface 102. That is, the fulcrum member 22 has the function of adjusting the protrusion amount from the housing mating surface 102.

[0032] The operating component 30 is the part that the operator directly operates during the pull-out operation of the compensating sleeve 16. The operating component 30 has a base end 302, an end portion 304, and a middle portion 306. The end portion 304 is the part that inserts into the gap between the working surface 202 and the top surface 161 of the compensating sleeve 16. The middle portion 306 is the part that contacts the end of the fulcrum member 22 protruding from the housing mating surface 102. The base end 302 is the part that the operator directly operates. Such an operating component 30 can be used, for example, with a wrench. The length dimension of the operating component 30 is not limited. For example, the operating component 30 has a length such that the base end 302 extends to a position outside the outer edge of the housing mating surface 102.

[0033] 3. Pull-out operation steps using a compensating sleeve extraction tool

[0034] Next, the steps of the method for pulling out the compensation sleeve 16 of the compensation sleeve insertion and removal auxiliary tool according to the embodiment will be described in detail.

[0035] Preparation process: Cover removal process

[0036] As a preparatory step, the operator removes the mounting bolts 14 and removes the housing 12 from the valve 10. As a result, the mating surface 102 of the valve 10 housing and the top surface 161 of the compensating sleeve 16 are exposed.

[0037] First step: Installation of fulcrum component 22

[0038] In the first step of the operation, the operator screws the fulcrum component 22 into the threaded hole 104 of the housing mating surface 102. The threaded hole 104 is one of the multiple threaded holes 104 provided around the sleeve hole of the compensating sleeve 16, which is close to the center of the housing mating surface 102.

[0039] Second process: Installation of plate component 20

[0040] In the second step of the operation, the operator uses the connecting member 18 to install the plate member 20 onto the compensating sleeve 16. Here, the operator inserts the connecting member 18 through the through hole 206 of the plate member 20 and screws it into the threaded hole 162. At this time, the plate member 20 is connected to the connecting member 18 with its gripping surface 204 facing away from the fulcrum member 22. Furthermore, the plate member 20 is connected to the connecting member 18 with its gripping surface 204 extending towards the side opposite to the housing mating surface 102. The order of the first and second steps is not limited.

[0041] Third step: Adjusting the process

[0042] In the third step of the operation, the operator adjusts the gap between the working surface 202 of the plate component 20 and the top surface 161 of the compensating sleeve 16, as well as the protrusion of the fulcrum component 22. Here, the operator adjusts the threaded engagement of the connecting component 18 so that the width of the gap between the working surface 202 of the plate component 20 and the top surface 161 of the compensating sleeve 16 is wider than the thickness of the end portion 304 of the operating component 30. Additionally, the operator adjusts the threaded engagement of the fulcrum component 22 so that the protrusion of the fulcrum component 22 is greater than the height of the working surface 202 of the plate component 20 from the housing mating surface 102.

[0043] Fourth step: Pulling out

[0044] In the fourth step of the operation, the operator uses the operating component 30 to pull the compensating sleeve 16 out of the sleeve hole of the valve 10. Here, the operator holds the base end 302 of the operating component 30 with one hand and inserts the end portion 304 of the operating component 30 into the gap between the working surface 202 and the top surface 161 of the compensating sleeve 16, so that the middle portion 306 contacts the end portion of the fulcrum component 22. Then, while holding the holding surface 204 of the plate component 20 with the other hand, the operator applies force to the base end 302 of the operating component 30 towards the housing mating surface 102 of the valve 10. Thus, the base end 302 of the operating component 30 functions as the force point of the lever, the middle portion 306 functions as the fulcrum of the lever, and the end portion functions as the action point of the lever. As a result, the working surface 202 of the plate component 20 is pulled up in the pulling direction, and simultaneously, the compensating sleeve 16 is pulled up from the sleeve hole in the pulling direction.

[0045] The movement of the lever's point of action is smaller than the movement of the force point. Therefore, even when the base end 302 is moved to its maximum possible extent, the compensating sleeve 16 may not be completely pulled out of the sleeve hole. In this case, the operator performs another adjustment process, readjusting the engagement of the fulcrum component 22 so that the protrusion of the fulcrum component 22 is above the height of the working surface 202 of the plate component 20 from the housing mating surface 102. In this way, by alternately and repeatedly performing the adjustment and pull-out processes as needed, the compensating sleeve 16 is pulled out of the sleeve hole. The operator then replaces the various replacement parts of the pulled-out compensating sleeve 16.

[0046] Fifth step: Insertion step

[0047] In the fifth step of the operation, the operator uses the operating component 30 to insert the compensation sleeve 16 into the sleeve hole of the valve 10. Here, the operator inserts the compensation sleeve 16 into the sleeve hole of the valve 10 while holding the gripping surface 204 of the plate component 20 by hand.

[0048] 4. Function and effect of compensating sleeve insertion and removal auxiliary tools

[0049] The following functions and effects can be achieved using the aforementioned socket insertion and extraction auxiliary tools.

[0050] The sleeve insertion and removal aid forms a lever by connecting component 18, plate component 20, fulcrum component 22, and operating component 30 to pull the compensation sleeve 16 in the removal direction. Thus, even a firmly pressed-in compensation sleeve 16 can be pulled out with less force. As a result, the workload of the operator is reduced.

[0051] The connecting member 18 has a threaded portion 181 and a head 182, and the threaded portion 181 engages with a threaded hole 162 provided in the compensating sleeve 16. With this structure, by adjusting the engagement amount of the threaded portion 181, the size of the gap between the working surface 202 of the plate member 20 and the top surface 161 of the compensating sleeve 16 can be adjusted according to the thickness of the end portion 304 of the operating member 30.

[0052] The sleeve insertion and removal auxiliary tool uses two connecting bolts, which serve as connecting parts 18, to connect the plate part 20 to the top surface of the compensating sleeve 16. This allows for a reliable and stable connection of the plate part 20.

[0053] The sleeve insertion and removal aid connects to the connecting member 18 with the gripping surface 204 of the plate member 20 extending toward the side opposite to the mating surface 102 of the housing. With this structure, it is easy for the operator to grip the gripping surface 204 during operation.

[0054] The sleeve insertion and removal aid is connected to the connecting member 18 with the gripping surface 204 of the plate member 20 facing away from the connecting member 18 on the side opposite to the fulcrum member 22. With this structure, the action surface 202, which is the point of action, is easily visible even when the gripping surface 204 is being held.

[0055] The sleeve insertion and removal auxiliary tool is configured such that the operating part 30 can be installed and removed. With this structure, the operating part 30 can be prevented from becoming an obstacle when connecting the plate part 20 and the fulcrum part 22.

[0056] The sleeve insertion and removal aid uses a fulcrum bolt that engages with a threaded hole on the mating surface of the housing as a fulcrum component 22. With this structure, the protrusion of the fulcrum component 22 can be adjusted by adjusting the engagement amount.

[0057] The socket insertion and removal auxiliary tool uses a wrench as the operating part 30. With this structure, the removal of the compensation socket 16 can be performed without special tools.

[0058] Furthermore, the operating component 30 has a length such that the base end 302 is located outside the outer edge of the housing mating surface 102. With this structure, when an operator applies force to the base end 302 toward the housing mating surface 102, it is possible to prevent the hand holding the base end 302 from coming into contact with the housing mating surface 102.

[0059] Label Explanation

[0060] 10: Valve; 12: Housing; 14: Mounting bolt; 16: Compensating sleeve; 18: Connecting component; 20: Plate component; 22: Pivot component; 30: Operating component; 102: Housing mating surface; 104: Threaded hole; 161: Top surface; 162: Threaded hole; 181: Threaded part; 182: Head; 202: Actuating surface; 204: Holding surface; 206: Through hole; 302: Base end; 304: End part; 306: Middle part.

Claims

1. A compensating sleeve insertion and removal auxiliary tool, used to remove a compensating sleeve from a sleeve hole provided on the housing mating surface of a valve in a hydraulic elevator, wherein, The compensating sleeve insertion and removal auxiliary tool includes: The connecting component has one end connected to the top surface of the compensating sleeve and the other end extending in the pull-out direction of the compensating sleeve. A plate component, which is connected to the other end of the connecting component, has a functional surface extending in a direction intersecting the pull-out direction; A fulcrum component is configured to protrude from the housing mating surface in the pull-out direction; as well as The operating component has its end portion acting as the point of action, contacting the working surface of the plate component; its middle portion acting as the fulcrum, contacting the fulcrum component; and its base portion acting as the force point, which is operated by the operator. The connecting component includes a connecting bolt, which has a threaded portion at one end and a head with a diameter larger than the threaded portion at the other end. The connecting bolt is configured to allow the threaded portion to engage with a threaded hole provided on the top surface. The plate component has a through hole on the working surface with a diameter larger than that of the threaded portion and smaller than that of the head. The connecting bolt, when inserted into the through hole, engages with the threaded hole, thereby creating a gap between the working surface and the top surface. The gap is the width that allows the end portion of the operating component to be inserted.

2. The auxiliary tool for inserting and removing the compensating sleeve according to claim 1, wherein, The connecting component includes two connecting bolts. The plate component has two through holes on the functional surface with the same spacing as the two threaded holes provided on the top surface.

3. The compensating sleeve insertion and removal auxiliary tool according to claim 1 or 2, wherein, The plate component is an L-shaped component with a gripping surface perpendicular to the functional surface. The plate component is connected to the connecting component with the gripping surface extending toward the side opposite to the mating surface of the housing.

4. The auxiliary tool for inserting and removing the compensating sleeve according to claim 3, wherein, The plate component is connected to the connecting component with the gripping face facing away from the connecting component on the opposite side to the fulcrum component.

5. The auxiliary tool for inserting and removing the compensating sleeve according to claim 1, wherein, The operating components are configured to be detachable.

6. The auxiliary tool for inserting and removing the compensating sleeve according to claim 1, wherein, The fulcrum component includes a fulcrum bolt that engages with a threaded hole disposed on the mating surface of the housing.

7. The auxiliary tool for inserting and removing the compensating sleeve according to claim 1, wherein, The operating component is a wrench.

8. The auxiliary tool for inserting and removing the compensating sleeve according to claim 1, wherein, The operating component has a length such that the base end is located outside the outer edge of the housing mating surface.

9. A method for removing a compensating sleeve, used to remove a compensating sleeve from a sleeve hole provided on the housing mating surface of a valve in a hydraulic elevator using a compensating sleeve insertion and removal auxiliary tool, the compensating sleeve insertion and removal auxiliary tool comprising: The fulcrum is secured with bolts; A connecting bolt having a threaded portion at one end and a head with a diameter larger than the threaded portion at the other end; A plate component having a working surface having a through hole with a diameter larger than the threaded portion and smaller than the head; And operating components, which are operated by a worker, wherein the method for pulling out the compensation sleeve includes: The first step is to screw the fulcrum bolt into the threaded hole provided on the mating surface of the housing; The second step involves screwing the connecting bolt into the threaded hole on the top surface of the compensating sleeve while it is inserted into the through hole, thereby creating a gap between the working surface and the top surface. The third step involves adjusting the engagement of the fulcrum bolts and the connecting bolts; and In the fourth step, the end portion is used as the point of action, making it contact the working surface of the plate component; the middle portion is used as the fulcrum, making it contact the fulcrum with bolts; and the base end portion is used as the force point, applying force to the base end portion towards the mating surface of the housing. The third process includes the following steps: Adjust the engagement of the connecting bolts so that the gap becomes a width that allows the end portion of the operating component to be inserted; and Adjust the engagement of the connecting bolts so that the protrusion of the fulcrum bolt is greater than or equal to the height of the working surface of the plate component from the mating surface of the housing.

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