Donning and doffing assistive device

Abstract

To provide a detaching and attaching assisting jig capable of improving workability and safety. 【Solution means】The detaching and attaching assisting jig 1 of the present invention includes a plate-shaped base member 10, a pantograph jack device 20 fixed to the base member 10, a base member 30 fixed to the receiving base 22 of the pantograph jack device 20 and having an open upper end, and is rotatably inserted into the base member 30 in a horizontal plane. An auxiliary member 40 for holding the valve unit 500 via a jig 700 when detaching and attaching the valve unit 500 to an attachment portion opening downward, and a guide member 50 fixed to the base member 10 and extending in the elevating direction of the pantograph jack device 20. The base member 30 is provided with a guide arm 33 that extends toward the guide member 50 and is slidably fitted to the guide member 50.

Description

Technical Field

[0001] The present invention relates to a jig for assisting the attachment and detachment of equipment attached to a device, and more particularly to a detachment assisting jig for assisting the attachment and detachment of equipment attached to an attachment portion that opens downward of the device.

Background Art

[0002] Equipment attached to a device is subject to maintenance work regularly or at any timing. In the maintenance work, the equipment is removed from the device and then attached to the device again.

[0003] For example, a compression device such as a compressor is provided with valve equipment such as a suction valve and a discharge valve. The valve equipment is removed from the compression device as a maintenance target, and after removal, it is cleaned and then attached to the compression device again, or replaced with another new valve equipment and attached.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0005] The work load of attaching and detaching equipment attached to a device increases depending on the working environment. For example, when attaching and detaching equipment attached to an attachment portion that opens downward of the device, it is necessary to move the equipment downward when removing it, which poses a problem in workability.

[0006] For example, taking a reciprocating compression device as an example, when the piston mechanism reciprocates in the horizontal direction, in the device configuration where the mounting part of the discharge valve (valve device) opens downward of the piston mechanism, the discharge valve is inserted and mounted from below into the mounting part that opens downward together with the valve pressing member. The discharge valve is regularly maintained, and a detachment operation is required to remove the discharge valve and the valve pressing member from the mounting part and then reinstall them or replace them with new members.

[0007] At this time, if the weights of the discharge valve and the valve pressing member (devices to be removed) are large, the removal operation of moving them downward with respect to the mounting part will increase the load on the worker's manual labor, resulting in a problem of reduced workability. In particular, when the space between the mounting part that opens downward of the device and the scaffold or the floor surface is narrow, the worker has to squat down to remove the discharge valve and the valve pressing member from the mounting part, so the work load is high, such as receiving the discharge valve and the valve pressing member in a semi-bent posture. Also, when installing the device, there are problems such as a decrease in workability due to an increase in the work load caused by the weight of the device and an increase in the work load of the worker.

[0008] Also, when removing or installing the discharge valve and the valve pressing member from the mounting part that opens downward of the device, there is a possibility that the discharge valve and the valve pressing member may fall, and it is necessary to consider the safety of the worker and the damage caused by the fall of the discharge valve and the valve pressing member.

[0009] Therefore, an object of the present invention is to provide a detachment assistance jig that can assist in the detachment of a device mounted on a mounting part that opens downward of the device and improve workability and safety.

Means for Solving the Problem

[0010] (1) The present invention is a detachment assisting jig for assisting the detachment and attachment of a valve unit attached to a device. The valve unit has a valve and a valve pressing member for pressing the valve against the device. The valve pressing member is inserted into a valve mounting portion that opens downward in the device, and is fitted while rotating to be attached to the valve mounting portion. Further, a jig for integrating the valve pressing member and the valve can be attached to the valve unit when detaching and attaching the valve unit.

[0011] And the detachment assisting jig has a plate-shaped base member, a pantograph jack device fixed to the base member, a base member fixed to the receiving base of the pantograph jack device and having an open upper end, an auxiliary member rotatably inserted in the horizontal plane with respect to the base member and holding the valve unit via the jig, and a guide member fixed to the base member and extending in the elevating direction of the pantograph jack device. The base member can be provided with a guide arm extending toward the guide member and slidably fitted to the guide member.

[0012] (2) In the above (1), the auxiliary member can be configured to have an anti-slip sheet on the surface in contact with the jig.

[0013] (3) In the above (1), the valve pressing member is formed in a cylindrical shape, and the jig is attached to the valve pressing member in a state where the opening at the lower end of the valve pressing member is not closed. The auxiliary member can be configured to be formed in a shape that exposes the opening at the lower end of the valve pressing member when holding the valve unit via the jig.

[0014] (4) In the above (1), the guide members can be provided at a plurality of positions sandwiching the pantograph jack device in the horizontal direction, and the guide arms can be provided for each guide member.

[0015] (5) In the above (1), the attaching / detaching auxiliary jig can be configured to have a plurality of pantograph jack devices, and the plurality of pantograph jack devices can be configured to be connected to each other in the lifting direction of the pantograph jack device. Then, the lowermost pantograph jack device is fixed to the base member, and the base member is fixed to the receiving base of the uppermost pantograph jack device.

[0016] (6) The present invention is an attaching / detaching auxiliary jig for assisting the attachment and detachment of equipment attached to a device. The equipment is inserted from an equipment attachment portion that opens downward in the device, and is fitted while rotating to be attached to the equipment attachment portion.

[0017] And the attaching / detaching auxiliary jig includes a plate-shaped base member, a pantograph jack device fixed to the base member, a base member fixed to the receiving base of the pantograph jack device and having an open upper end, an auxiliary member that is rotatably inserted in a horizontal plane with respect to the base member and holds the equipment, and a guide member fixed to the base member and extending in the lifting direction of the pantograph jack device. The base member can be configured to include a guide arm that extends toward the guide member and is slidably fitted to the guide member.

Effects of the Invention

[0018] According to the present invention, while supporting the valve unit that is inserted from the valve attachment portion that opens downward in the device and is fitted while rotating to be attached to the valve attachment portion, it can be rotated to release the attachment state, and the valve unit after the attachment state is released can be held, and the guide member can be used to stably lift and lower the pantograph jack device.

[0019] Therefore, it can assist in the attachment and detachment of the valve unit attached to the attachment portion that opens downward in the device, and improve workability and safety.

Brief Description of the Drawings

[0020]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Mode for Carrying Out the Invention

[0021] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0022] (Example 1) FIGS. 1 to 8 are diagrams showing Example 1 according to the present invention. The attachment / detachment assisting jig 1 of this example is inserted from a device mounting portion that opens downward in the device, and while rotating, it is fitted and attached to the device mounting portion to assist in the attachment and detachment of the device.

[0023] FIGS. 1 and 2 are side views of the attachment / detachment assisting jig 1. The X direction and the Y direction are directions orthogonal to each other in a plan view, and the direction orthogonal to the X direction and the Y direction is the Z direction (vertical direction). FIG. 1 is a side view when viewed from the Y direction (X-Z plane view), and FIG. 2 is a side view when viewed from the X direction (Y-Z plane view).

[0024] As shown in FIGS. 1 and 2, the detachable auxiliary jig 1 includes a plate-shaped base member 10, a pantograph jack device 20 fixed to the base member 10, a base member 30 fixed to the receiving base 22 of the pantograph jack device 20 and having an open upper end, an auxiliary member 40 rotatably inserted into the base member 30 within the XY plane (horizontal plane), and a pair of guide members 50 fixed to the base member 10 and extending in the lifting direction (vertical direction) of the pantograph jack device 20.

[0025] The pantograph jack device 20 is a lifting device that raises and lowers the base member 30 and the auxiliary member 40 rotatably attached to the base member 30 in the vertical direction. The pantograph jack device 20 includes a pedestal 21, a receiving base 22, a lower frame 23, an upper frame 24, a screw member 25, and an operation portion 26.

[0026] The lower ends of the pair of lower frames 23 are rotatably connected to the pedestal 21, and the upper ends of the pair of upper frames 24 are rotatably connected to the receiving base 22. The pair of lower frames 23 and the pair of upper frames 24 are rotatably connected to each other by shaft portions 27a and 27b so as to form a rhombus shape. The screw member 25 is disposed so as to penetrate horizontally (in the X direction in this embodiment) between the pair of lower frames 23 and the pair of upper frames 24, and idles with respect to the shaft portion 27b provided with a thrust bearing while being screwed to the shaft portion 27a. When an operator rotates the screw member 25 in one rotational direction (clockwise) using the operation portion 26, the screwed shaft portion 27b and shaft portion 27a move closer to each other, and the rhombus formed by the pair of lower frames 23 and the pair of upper frames 24 gradually deforms from a horizontally long rhombus to a vertically long rhombus, thereby raising the receiving base 22. When the operator rotates the screw member 25 in the other rotational direction (counterclockwise) using the operation portion 26, the screwed shaft portion 27b and shaft portion 27a move apart from each other, and the rhombus formed by the pair of lower frames 23 and the pair of upper frames 24 gradually deforms from a vertically long rhombus to a horizontally long rhombus, thereby lowering the receiving base 22.

[0027] FIG. 3 is a view showing the base member 30 and the auxiliary member 40 of the attachment / detachment assisting jig 1. FIG. 4 is a view of the base member 30 and the auxiliary member 40 of the attachment / detachment assisting jig 1 viewed from above.

[0028] The base member 30 includes a rectangular fixing portion 31 fixed to the receiving base 22, and a hollow cylindrical member 32 fixed to the upper surface of the fixing portion 31 and having an open upper end. A pair of guide arms 33 extending horizontally are provided on each side surface of both sides of the fixing portion 31. The pair of guide arms 33 are provided corresponding to the guide member 50 and extend in a direction (Y direction) orthogonal to the longitudinal direction (X direction) of the pantograph jack device 20. Although the cylindrical member 32 is fixed to the receiving base 22 of the pantograph jack device 20 via the fixing portion 31, for example, the base member 30 may be composed of only the cylindrical member 32, and while the cylindrical member 32 is directly fixed to the receiving base 22, a pair of guide arms 33 may be provided in the horizontal direction from the outer peripheral surface of the cylindrical member 32.

[0029] The auxiliary member 40 includes a shaft member 41 rotatably inserted into the opening of the base member 30 (cylindrical member 32), and a receiving member 42 provided outside from the upper end of the shaft member 41 and extending horizontally. The auxiliary member 40 (receiving member 42) can rotate within the XY plane, and an anti-slip sheet 43 is provided on the upper surface of the receiving member 42. As the anti-slip sheet 43, a known anti-slip material such as a rubber material can be applied. The auxiliary member 40 is a member for holding (placing) the valve unit 500 after the attachment state is released by rotating the valve pressing member 520 in a state where the receiving member 42 abuts against the abutting member 720 of the jig 700 described later.

[0030] The receiving member 42 extends horizontally from the upper end of the shaft member 41 to both sides and has an elongated thin plate shape. The shaft member 41 has openings at both upper and lower ends and is formed hollow. As shown in FIG. 4, the receiving member 42 can rotate about the shaft member 41 in the XY plane.

[0031] The guide member 50 is a rod-shaped member with one end fixed to the base member 10, and is formed to be long in the vertical direction (lifting direction). As shown in FIG. 2, two guide members 50 are provided on both sides of the pantograph jack device 20 in the Y direction of the pantograph jack device 20, sandwiching the pantograph jack device 20. A pair of guide arms 33 of the base member 30 extend horizontally toward each guide member 50, and a ring member 34 that fits with the guide member 50 is provided at the tip. The ring member 34 is fitted to the guide member 50 so as to be slidable in the vertical direction.

[0032] Note that the guide members 50 can be provided at a plurality of positions that sandwich the pantograph jack device 20 in the horizontal direction, and the guide arms 33 can be provided for each guide member 50. The number of guide members 50 is arbitrary. For example, it can be configured to provide one or three or more guide members 50, and one or a plurality of corresponding guide arms 33 can be provided on the base member 30 for each guide member 50.

[0033] Next, the usage method of the detachable auxiliary jig 1 will be described. In the following description, in a reciprocating compression device (for example, a reciprocating compressor), the detaching and attaching operation of the valve unit 500 that is inserted from a valve attachment portion (valve attachment port) that opens downward and is attached while rotating will be described as an example.

[0034] As described above, in the case where the reciprocating compression device has a device configuration in which the piston mechanism reciprocates in the horizontal direction, as shown in FIG. 1, the valve attachment portion of valve equipment such as a discharge valve may be provided with an opening downward. The valve equipment is inserted and attached from below to the valve attachment portion that opens downward. The valve equipment is periodically maintained, and a detaching and attaching operation of removing the valve equipment from the valve attachment portion and then attaching it again or replacing it with a new equipment is performed.

[0035] The valve device is configured as a valve unit 500 including a valve 510 and a valve pressing member 520 that presses the valve 510 against a reciprocating compression device (valve mounting portion). A disc-shaped valve 510 is placed on the cylindrical valve pressing member 520. The upper end of the hollow valve pressing member 520 is blocked by the valve 510, and the lower end is open.

[0036] The valve pressing member 520 is inserted from a valve mounting portion that opens downward and is fitted by rotating inside the valve mounting portion. A locking pin 521 is provided on the outer peripheral surface of the valve pressing member 520. On the inner wall of the valve mounting portion, a groove portion provided in the insertion direction of the valve pressing member 520 and a locking groove formed in the circumferential direction from the groove portion and engaged with the locking pin 521 that moves in the circumferential direction by the rotation of the valve pressing member 520 are formed (not shown). The valve unit 500 to which the detachment assisting jig 1 of the present embodiment is applied is attached to a valve mounting portion that opens downward by internal fitting.

[0037] And a jig 700 is prepared in advance for the detachment and attachment of this valve unit 500. Since the valve 510 is only placed on the valve pressing member 520, it is not fixed or connected to the valve pressing member 520. The jig 700 is a jig that integrates the valve pressing member 520 and the valve 510 when the valve unit 500 is detached and attached, and can prevent the valve 510 from coming off the valve pressing member 520 during detachment and attachment.

[0038] The jig 700 can be inserted into the inside through the opening of the cylindrical valve pressing member 520 in the state (mounted state) of being mounted on the valve mounting portion, includes a connecting portion 710 connectable to the valve 510 on the tip side, and includes a contact member 720 that contacts the lower end portion of the valve pressing member 520 on the rear end side. A hole with a threaded groove is formed at the center of the disc-shaped valve 510 (not shown), and a connecting bolt 730 can be attached to the hole. The connecting bolt 730 is positioned to protrude inside the valve pressing member 520 and can be connected to the connecting portion 710 at the tip of the jig 700 by screw fitting. On the other hand, the contact member 720 is formed in an elongated thin plate shape that contacts the lower end portion of the cylindrical valve pressing member 520 and does not block the opening of the valve pressing member 520.

[0039] The jig 700 can include a nut that is screw-fitted as the connecting portion 710 at the tip of a single screw rod 740. A contact member 720 having an insertion hole through which the screw rod 740 passes is provided at the rear end, and a holding nut 721 that presses the contact member 720 is screw-fitted to the screw rod 740. Therefore, the connecting portion 710 of the jig 700 is inserted into the inside of the valve pressing member 520, the connecting portion 710 is engaged with the connecting bolt 730 protruding from the valve 510, and the holding nut 721 is moved to bring the contact member 720 into contact with the lower end of the valve pressing member 520. Thereby, the valve 510 and the valve pressing member 520 are integrated by the jig 700 and can be removed.

[0040] In the state where the jig 700 is attached, conventionally, an operator rotates the valve pressing member 520 to release the attached state (locked state), moves downward while holding the valve pressing 520 whose attached state has been released, and removes it from the valve mounting portion. The attachment / detachment assisting jig 1 of the present embodiment is used as a jig that assists this removal work.

[0041] FIG. 5 is a diagram showing a removal mode of the valve unit 500 (valve device) using the attachment / detachment assisting jig 1. FIG. 6 is a diagram showing a mode during the descent of the attachment / detachment assisting jig 1 after the valve unit 500 has been removed.

[0042] As shown in FIG. 5, when removing the valve unit 500, the jig 700 is set. Then, the attachment / detachment assisting jig 1 is installed below the valve unit 500 on which the jig 700 is set. At this time, the auxiliary member 40 is inserted into the base member 30, and the receiving member 42 of the auxiliary member 40 is arranged to face the contact member 720 of the jig 700. At the same time, the guide arm 33 of the base member 30 is slidably fitted to the rod-shaped guide member 50. A slip prevention sheet 43 is provided on the surface that contacts the jig 700, that is, on the receiving member 42 (auxiliary member 40). The receiving member 42 contacts the contact member 720 via the slip prevention sheet 43.

[0043] The operator rotates the screw member 25 using the operation unit 26 to raise the auxiliary member 40 (receiving member 42) and brings the receiving member 42 into contact (abutment) with the lower surface of the contact member 720. The operation (raising and lowering) of the operation unit 26 is performed by hooking a handle for a pantograph jack device with one end bent on the operation unit 26 and rotating it as appropriate (not shown). At this time, the longitudinal directions of the receiving member 42 and the contact member 720 can be made substantially coincident, and the receiving member 42 can be brought into contact with the lower surface of the contact member 720. The receiving member 42 (auxiliary member 40) can hold the valve unit 500 via the jig 700 (contact member 720).

[0044] With the receiving member 42 in contact with the contacting member 720, the operator rotates the valve pressing member 520 to release the mounting state. The operator can rotate the contacting member 720 by gripping it, rotate the contacting member 720 by gripping the receiving member 42, or rotate by gripping both the contacting member 720 and the receiving member 42, so that the operator can stably release the mounting state of the valve pressing member 520 without directly holding the valve unit 500. When the contacting member 720 and / or the receiving member 42 rotates, since the receiving member 42 is in contact with the contacting member 720 via the anti-slip sheet 43, the contacting member 720 and the receiving member 42 can be integrally rotated without slipping and shifting. Therefore, the entire lower surface of the elongated contacting member 720 is supported by the receiving member 42, and the valve unit 500 after the mounting state is released can be stably held.

[0045] Also, as shown in FIG. 5, since the central portion of the shaft member 41 constituting the auxiliary member 40 is hollow, the screw rod 740 and the pressing nut 721 located below the contacting member 720 can retract inside the shaft member 41, and the receiving member 42 and the contacting member 720 can be in surface contact in the longitudinal direction.

[0046] Subsequently, as shown in FIG. 6, the operator reversely rotates the screw member 25 using the operation unit 26 to lower the auxiliary member 40 (receiving member 42). The valve unit 500 placed on the auxiliary member 40 via the contacting member 720 can be stably lowered by the guide of the guide member 50.

[0047] On the other hand, when mounting the valve unit 500 to the valve mounting portion, the pantograph jack device 20 is raised from the state shown in FIG. 6, the valve unit 500 is inserted into the valve mounting portion, and the state shown in FIG. 5 is achieved. In the state shown in FIG. 5, the operator rotates the contacting member 720 and / or the receiving member 42 to fit them, and sets the valve unit 500 in the mounted state. Then, the jig 700 is removed.

[0048] As described above, the contact member 720 is attached to the valve pressing member 520 without closing the opening at the lower end of the cylindrical valve pressing member 520. However, when the receiving member 42 (auxiliary member 40) holds the valve unit 500 via the contact member 720, it is formed in a shape (elongated shape) that exposes the opening at the lower end of the valve pressing member 520. For this reason, an operator can visually check the inside of the valve pressing member 520 or put a hand inside the valve pressing member 520, and the workability can be improved when removing and attaching the valve unit 500. Also, it becomes easier to remove the jig 700 after attaching the valve unit 500.

[0049] In the attachment operation of the valve unit 500, when inserting the valve unit 500 into the valve attachment portion, if it tilts, it will interfere with the valve attachment portion and it will be difficult to insert the valve unit 500. However, the attachment / detachment assist jig 1 of the present embodiment can stably raise the valve unit 500 by the guide member 50, and can perform the attachment operation while reducing the risk of interference when inserting the valve unit 500 by the pantograph jack device 20. For example, when inserting the valve unit 500 by pushing it in with a hydraulic jack or the like, since the feeling of the valve unit 500 interfering with the valve attachment portion cannot be understood, the valve 510 and the valve pressing member 520 may be damaged or scratched. However, in the attachment / detachment assist jig 1 of the present embodiment, since the pantograph jack device 20 raises it while turning the screw member 25, when the valve unit 500 interferes with the valve attachment portion, the feeling of turning the screw member 25 becomes heavy due to the resistance caused by the interference. By feeling that the force for turning the screw member 25 is heavy, it is possible to grasp that the valve unit 500 is interfering with the valve attachment portion, and it is possible to avoid forcibly pushing it in when it is interfering. Therefore, it is possible to reduce the damage or scratching of the valve 510 and the valve pressing member 520.

[0050] The attachment / detachment assisting jig 1 of this embodiment is inserted from a valve attachment portion that opens downward in the device, and while supporting the valve unit 500 (valve pressing member 520) that is fitted while rotating and attached to the valve attachment portion, it can be rotated to release the attachment state, hold the valve unit 500 after the attachment state is released, and can perform the lifting and lowering of the pantograph jack device 20 stably by the guide member 50.

[0051] The attachment / detachment assisting jig 1 assists in the attachment and detachment of the valve unit 500 attached to the attachment portion that opens downward in the device, and can improve workability and safety.

[0052] FIG. 7 is a diagram showing a first modification example of the attachment / detachment assisting jig 1. The example of FIG. 7 shows a mode of assisting the attachment and detachment of the valve unit 500 without using the jig 700. As shown in FIG. 7, the assisting member 40 rotates the valve pressing member 520 with the lower end portion (opening end portion) of the valve pressing member 520 in contact with the receiving member 42 to release the attachment state, and can hold the valve unit 500 after the attachment state is released.

[0053] Therefore, even when the jig 700 is not used, it is possible to assist in the attachment and detachment of the valve unit 500 attached to the attachment portion that opens downward in the device, and improve workability and safety.

[0054] On the other hand, the attachment / detachment assisting jig 1 of this embodiment can be applied in addition to the attachment and detachment of the valve unit 500.

[0055] That is, as a jig for assisting the attachment and detachment of a device that is inserted from a device attachment portion that opens downward of the device and is fitted while rotating and attached to the device attachment portion, the attachment / detachment assisting jig 1 of the present embodiment can be used. The attachment / detachment assisting jig 1 includes a plate-shaped base member 10, a pantograph jack device 20 fixed to the base member 10, a base member 30 fixed to a receiving base 22 of the pantograph jack device 20 and having an open upper end, an auxiliary member 40 that is rotatably inserted in a horizontal plane with respect to the base member 30 and holds the device, and a guide member 50 fixed to the base member 10 and extending in the elevating direction of the pantograph jack device 20. The base member 30 can be configured to include a guide arm 33 that extends toward the guide member 50 and is slidably fitted to the guide member 50.

[0056] FIG. 8 is a diagram showing a second modification example of the attachment / detachment assisting jig 1. The example of FIG. 8 is an attachment / detachment assisting jig 1 including pantograph jack devices 20A and 20B in which two pantograph jack devices are connected vertically. In the attachment / detachment assisting jig 1 of the second modification example, a receiving base 22 of the pantograph jack device 20B and a pedestal 21 of the pantograph jack device 20A are fixed to each other via a connecting member 60. The attachment / detachment assisting jig 1 of the second modification example can perform height adjustment with each of the pantograph jack devices 20A and 20B. Even when the height from the installation surface on which the base member 10 is installed to the valve attachment portion (device attachment portion) that opens downward is high, the attachment / detachment operation can be performed without installing a raising base or the like on the installation surface.

[0057] The attachment / detachment assisting jig 1 of the present embodiment can also be configured to connect two or more pantograph jack devices 20 to each other in the elevating direction and have a plurality of pantograph jack devices 20. And the lowermost pantograph jack device can be fixed to the base member 10, and the base member 30 can be fixed to the receiving base 22 of the uppermost pantograph jack device.

Explanation of Reference Numerals

[0058] 1 Attachment / detachment assisting jig 10 Base member 20 pantograph jack device, 21 pedestal, 22 receiving base, 23 lower frame, 24 upper frame, 25 screw member, 26 operation part, 27a, 27b shaft parts 30 base member 31 fixing part 32 cylindrical member 33 guide arm 34 ring member 40 auxiliary member 41 shaft member 42 receiving member 43 anti-slip sheet 50 guide member 60 connecting member 500 valve unit 510 valve 520 valve pressing member 521 locking pin 700 jig 710 connecting part 720 abutting member 721 holding nut 730 connecting bolt 740 threaded rod

Claims

1. A detachment assisting jig for assisting in the detachment and attachment of a valve unit attached to a device, wherein the valve unit has a valve and a valve pressing member for pressing the valve against the device, and the valve pressing member is inserted into a valve mounting portion that opens downward in the device and is fitted while rotating to be attached to the valve mounting portion, a jig for integrating the valve pressing member and the valve is attachable to the valve unit when the valve unit is detached and attached, the detachment assisting jig includes a plate-shaped base member, a pantograph jack device fixed to the base member, a base member fixed to a receiving base of the pantograph jack device and having an open upper end, an auxiliary member rotatably inserted in the horizontal plane with respect to the base member and for holding the valve unit via the jig, and a guide member fixed to the base member and extending in the elevating direction of the pantograph jack device, wherein the base member is provided with a guide arm extending toward the guide member and slidably fitted to the guide member. The detachment assisting jig is characterized by this.

2. The detachment assisting jig according to claim 1, wherein the auxiliary member has an anti-slip sheet on a surface that contacts the jig.

3. The valve pressing member is formed in a cylindrical shape, the jig is attached to the valve pressing member in a state where an opening at the lower end of the valve pressing member is not blocked, and the auxiliary member is formed in a shape that exposes the opening at the lower end of the valve pressing member when holding the valve unit via the jig. The detachment assisting jig according to claim 1 is characterized by this.

4. The guide member is provided at a plurality of positions sandwiching the pantograph jack device in the horizontal direction, and the guide arm is provided for each of the guide members. The detachment assisting jig according to claim 1 is characterized by this.

5. The detachment assisting jig has a plurality of the pantograph jack devices, the plurality of pantograph jack devices are connected to each other in the elevating direction of the pantograph jack device, and the lowermost pantograph jack device is fixed to the base member, and the base member is fixed to the receiving base of the uppermost pantograph jack device. The detachment assisting jig according to claim 1 is characterized by this.

6. A detachment assisting jig for assisting the detachment of a device attached to a device, wherein the device is inserted through a device mounting portion that opens downward of the device, and is fitted while rotating to be attached to the device mounting portion, the detachment assisting jig includes: a plate-shaped base member; a pantograph jack device fixed to the base member; a base member fixed to a receiving base of the pantograph jack device and having an open upper end; an auxiliary member rotatably inserted in a horizontal plane with respect to the base member for holding the device; and a guide member fixed to the base member and extending in the elevating direction of the pantograph jack device. The detachment assisting jig is characterized in that the base member is provided with a guide arm that extends toward the guide member and is slidably fitted to the guide member.

Images