Joint part removal jig

Abstract

To provide a tool for quickly, quietly, safely and easily removing a gas pressure lifting cylinder from a chair or table, which has been a difficult task since it requires repeated hammering and produces a loud noise when removing the cylinder. [Solution] In order to remove a gas-pressure lift cylinder from a chair or table, the jig of the present invention is equipped with a pressure receiving fixed plate, a push-out fixed plate, and a push-out tool.The cylinder, which has a connecting part fitted to it, is clamped and fixed between the pressure receiving fixed plate and the push-out fixed plate by the jig of the present invention, and the cylinder can be removed quietly, quickly, and easily by the pushing force of the rotating movement of the push-out tool.

Description

[Technical Field]

[0001] The present invention relates to a removal jig for joined parts. [Background technology]

[0002] In recent years, many chairs and tables equipped with gas-pressure lift cylinders have been used. The gas pressure in these cylinders allows chairs and tables to be raised and lowered, and the height can be freely adjusted to suit the user's physique and preferences, making them popular with many people. However, these cylinders are consumables and must be replaced when they reach the end of their lifespan. The Japan Office Furniture Association, a general incorporated association, has set a standard usage period of eight years for chairs with rotating seats, assuming eight hours of use per day. After five to eight years of use, the cylinder deteriorates and the chair will no longer move up or down. Therefore, the old cylinder should be removed and replaced with a new one. So, we searched for a jig to remove the cylinder, but we couldn't find one. It seems that there is no jig for removing the cylinder in the world. Therefore, the current method is to "remove it by hitting it with a hammer" as shown in Patent Document 1 below. As shown in Figure 2, the upper part of the cylinder 12 is fitted into connecting part 11, and the lower part is fitted into connecting part 13. The current situation is that if you keep hitting the fitted part with the hammer, it will come off if you are lucky. Since the hammer hits the iron cylinder 12, iron collides with iron, which makes a loud noise and is not something that can be done in an office. In many cases, hitting it repeatedly with the hammer will not remove it, and many people end up giving up and throwing away the entire chair or table, even though they should only be throwing away the cylinder 12. This results in a huge amount of waste, as chairs and tables that are still usable are thrown away. This goes against the SDGs. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-292851 Summary of the Invention [Problem to be solved by the invention]

[0004] In the case of a chair or table equipped with the cylinder shown in Figure 1, if the cylinder 12 breaks down and the chair or table can no longer be raised or lowered, the broken cylinder 12 can be removed and replaced with a new cylinder to restore normal use, or the broken chair or table can be discarded and replaced with a new one. As shown in Figure 2, the connecting part 11 is located at the top of the cylinder 12 and the connecting part 13 is located at the bottom, both of which are fitted to one end of the cylinder 12. Because they are fitted together, there is an issue that they are difficult to remove. As the above-mentioned Patent Document 1 states that "the cylinders can be separated by hitting them with a hammer," currently the cylinder 12 is removed by hitting it with the hammer while making a loud noise. When the connecting parts 11 and 13 are hit with the hammer by a person without being fixed in any way, the hitting position or pushing position is often incorrect, making them difficult to remove. In response to this problem, the jig of the present invention fastens the connecting parts 11 and 13 fitted into the cylinder 12 to the guide 23 via the slit 22 of the pressure receiving fixing plate 21, and then the rotation of the push rod portion 33 of the push-out tool 38 pushes out one end of the cylinder 12, thereby solving the problem of cylinders that cannot be removed, and also aims to solve the problem of waste caused by discarding entire chairs or tables that are still usable. [Means for solving the problem]

[0005] In order to solve the above problem, the present invention provides a removal jig characterized in that, when the connecting part 11 or the connecting part 13 fitted to the cylinder 12 is fastened to the guide 23 via the slit 22 of the press-receiving fixing plate 21, the connecting part 11 or the connecting part 13 is sandwiched between the pair of fixing plates, the push-out fixing plate 31 is threadedly engaged with the push-out tool 38 and has the female screw portion 32 penetrating its main surface, the push-out tool 38 has the female screw portion 32 has the push rod portion 33 and is threadedly engaged with the female screw portion 32, and can push out one end of the cylinder 12 by rotating.

[0006] The present invention provides a removal jig characterized in that the pressure receiving fixing plate 21 has a guide 23 that extends from the tip of the slit 22 in the direction in which the cylinder 12 is arranged and can support the cylinder. [Effects of the Invention]

[0007] According to the present invention, if the coupling part 11 or 13 fitted to the cylinder 12 is fastened to the guide 23 in the jig of the present invention via the slit 22 of the pressure receiving fixing plate 21, the coupling part 11 or 13 will be clamped by the pair of fixing plates, and one end of the cylinder 12 will be pushed and removed by the rotation of the push rod part 33, allowing the cylinder 12 to be removed in a short time without making a loud noise. Also, since the malfunctioning cylinder has been removed, by attaching a new cylinder, the chair or table can be used in the same way as the original. [Brief explanation of the drawings]

[0008] [Figure 1] This is an overall view showing the component configuration of a cylinder-mounted chair. [Figure 2] FIG. 1 is a perspective view showing the state in which the connecting part 11 and the connecting part 13 are fitted to the cylinder. [Figure 3] This is a perspective view showing the effect of the present invention with the connecting parts 11 and 13 removed, leaving only the cylinder. [Figure 4] 5 and the push-out fixing plate of FIG. 6 are combined, and is an overall perspective view showing that the jig of the present invention is equipped with a press-out fixing plate, a push-out fixing plate, and a push-out tool. [Figure 5] 5 is a perspective view showing that the pressure receiving fixing plate shown in FIG. 4 is provided with slits, guides, fixing portions 24, 25, 26, and 27. FIG. [Figure 6] 5 is a perspective view showing that the push-out fixing plate shown in FIG. 4 is provided with a female screw portion, a push rod portion, fixing portions 34, 35, and 36, and a push-out tool. [Figure 7] 5 is a perspective view of the jig of the present invention shown in FIG. 4 with the joining part 11 shown in FIG. 2 fastened to a guide via a slit. [Figure 8] 5 is a side view of the jig of the present invention shown in FIG. 4 in which the joining part 11 shown in FIG. 2 is fastened to a guide via a slit. [Figure 9] This is a side view showing the jig of the present invention in Figure 4 in which the connecting part 11 shown in Figure 2 is fastened to the guide via a slit, the connecting part 11 is clamped by shortening the distance between the push-receiving fixed plate and the push-out fixed plate, and one end of the cylinder is pushed out by rotating the push rod part of the push-out tool to remove it. [Figure 10] 4 is a side view of the jig of the present invention in which the joining part 13 shown in FIG. 2 is fastened to the guide through a slit. [Figure 11] FIG. 4 is a side view showing the state in which the joining part 13 shown in FIG. 2 is fastened to the guide through the slit in the jig of the present invention, the joining part 13 is clamped by shortening the distance between the push-receiving fixed plate and the push-out fixed plate, and one end of the cylinder is pushed out by rotating the push rod part of the push-out tool to remove it. DETAILED DESCRIPTION OF THE INVENTION

[0009] The best mode for carrying out the present invention will be described below with reference to Figures 1 to 11. Note that this is merely an example, and the technical scope of the present invention is not limited to this.

[0010] As shown in FIG. 1, the cylinder-mounted chair is composed of four parts: the chair seat, the connecting part 11, the cylinder 12, and the connecting part 13; however, the chair seat is not the subject of the present invention.

[0011] As shown in Figure 2, the subject of the present invention is three connected parts, namely, the connected part 11, the cylinder 12, and the connected part 13, but the two connected parts, the connected part 11 and the connected part 13, can be removed to leave only the cylinder 12.

[0012] As shown in Figure 3, the cylinder 12 has been removed from the connecting parts 11 and 13. This is the result of removing the two connecting parts, the upper connecting part 11 and the lower connecting part 13, and implementing the function of the jig of the present invention. The final form of the effect of the present invention is that only the cylinder 12 remains.

[0013] As shown in Figure 4, this is the overall configuration of the jig of the present invention, and is composed of a pair of pressure receiving fixed plate 21 and the other push-out fixed plate 31. The pressure receiving fixed plate 21 has the slit 22 that allows the cylinder 12 to slide via the axis of the cylinder 12 and the side of the pressure receiving fixed plate 21 so that the coupled parts are sandwiched between the pair of fixed plates, and the guide 23 that holds the cylinder 12 in place. The push-out fixed plate 31 is threadedly engaged with the push-out tool 38 and has the female screw portion 32 that penetrates its main surface. The push-out tool 38 has the push rod portion 33 with the male screw portion 32, and is threadedly engaged with the female screw portion 32 to push out one end of the cylinder 12 by rotating.

[0014] As shown in FIG. 5, the pressure receiving fixing plate 21 includes the slit 22, the guide 23, the fixing portion 24, the fixing portion 25, the fixing portion 26, and the fixing portion 27.

[0015] As shown in FIG. 6, the push-out fixing plate 31 includes the push-out tool 38, the female screw portion 32, the push rod portion 33, the fixing portion 34, the fixing portion 35, the fixing portion 36, and the fixing portion 37.

[0016] Figure 7 shows the state in which the cylinder 12 in the fitted state of Figure 2 is fastened to the guide 23 via the slit 22 of Figure 5 in the jig of the present invention of Figure 4, and is sandwiched between the pressure receiving fixing plate 21 and the push-out fixing plate 31.

[0017] Figure 8 shows the state of Figure 7 as viewed from the side, and Figure 4 shows the state in which the connecting part 11 of Figure 2 is fastened to the guide 23 via the slit 22, and is sandwiched between the pressure receiving fixing plate 21 and the push-out fixing plate 31.

[0018] Figure 9 shows a ready state in which the connecting part 11 is clamped by shortening the distance between the pressure receiving fixing plate 21 and the push-out fixing plate 31, as compared to the clamped state in Figure 8, and is fixed by the fixing parts 34, 35, 36, and 37, and one end of the cylinder is about to be pushed out and removed by the rotational movement of the push rod part 33 in the push-out tool 38.

[0019] Figure 10 shows a side view of the state in which only the connecting part 13 of Figure 2 is installed, after the connecting part 11 has been removed by the action of Figure 9, and is sandwiched between the pressure-receiving fixing plate 21 and the push-out fixing plate 31.

[0020] Figure 11 shows a ready state in which the joining part 13 is clamped by shortening the distance between the push-out fixing plate 21 and the push-out fixing plate 31, as compared to the clamped state in Figure 10, and is fixed by the fixing parts 34, 35, 36, and 37, and one end of the cylinder is about to be pushed out and removed by the rotational movement of the push rod part 33 in the push-out tool 38. [Example]

[0021] Next, a removal jig for the cylinder 12 of a chair or table equipped with a gas pressure lifting cylinder will be described with reference to FIGS. 2 to 11. FIG.

[0022] To remove the cylinder 12 connected to the connecting part 11 of FIG. 2, the pressure receiving fixing plate 21 of FIG. 5 and the push-out fixing plate 31 of FIG. 6 are placed side by side with a gap between them, as shown in FIG. 4. The two lower parts, front and back, are temporarily fastened together by bolts and nuts, connecting the fixing part 34 to the fixing part 24, and also by bolts and nuts, connecting the fixing part 35 to the fixing part 25. This temporary fastening creates an installation space 41 in which the connecting part 11 can be installed, and when the cylinder 12 fitted with the connecting part 11 of FIG. 2 is fastened to the guide 23 via the slit 22 as shown in FIG. 7, it will be sandwiched between the pressure receiving fixing plate 21 and the push-out fixing plate 31. The upper parts, front and back, are temporarily fastened together by bolts and nuts, connecting the fixing part 36 to the fixing part 26, and also by bolts and nuts, connecting the fixing part 37 to the fixing part 27. By finally tightening the four fixing parts 34, 35, 36, and 37, which were temporarily fastened, the connecting part 11 is clamped, and the connecting part 11 is completely fixed and ready to be removed as shown in Figure 9. Thereafter, the cylinder 12 is removed as shown in Figure 3 by the rotation of the push rod part 33 in the push-out tool 38.

[0023] To remove the cylinder 12 connected to the connecting part 13 of FIG. 2, the pressure receiving fixing plate 21 of FIG. 5 and the push-out fixing plate 31 of FIG. 6 are placed side by side with a gap between them, as shown in FIG. 4. The two lower parts, front and back, are temporarily fastened together by bolts and nuts, with fixing part 34 and fixing part 24, and also by bolts and nuts, with fixing part 35 and fixing part 25. This temporary fastening creates the installation space 41 in which the connecting part 13 can be installed, so when the cylinder 12 fitted with the connecting part 13 of FIG. 2 is fastened to the guide 23 through the slit 22 as shown in FIG. 7, it will be sandwiched between the pressure receiving fixing plate 21 and the push-out fixing plate 31. The upper parts, front and back, are temporarily fastened together by bolts and nuts, with fixing part 36 and fixing part 26, and also by bolts and nuts, with fixing part 37 and fixing part 27. By finally tightening the four fixing parts 34, 35, 36, and 37, which were temporarily fastened, the connecting part 13 is clamped, and the connecting part 13 is completely fixed and ready to be removed as shown in Figure 11. Thereafter, the cylinder 12 is removed by the rotation of the push rod part 33 in the push-out tool 38 as shown in Figure 3.

[0024] According to the present invention, the cylinder 12 with the connecting parts fitted is placed and fixed in the jig of the present invention, and the cylinder 12 is pushed out and removed by rotating the push rod portion 33 of the push-out tool 38, allowing the cylinder 12 to be removed in a short time without making a loud noise. Also, since the malfunctioning cylinder has been removed, by installing a new cylinder, the chair or table can be used in the same way as the original.

[0025] Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments. Furthermore, the effects described in the embodiments of the present invention are merely a list of the most preferable effects resulting from the present invention, and the effects of the present invention are not limited to those described in the embodiments of the present invention. [Explanation of symbols]

[0026] 11: Connecting parts 12: Cylinder 13: Connecting parts 14: Upper cylinder joint 15: Cylinder lower joint 21: Pressure receiving fixing plate 22: Slit 23: Guide 24: Fixed part 25: Fixed part 26: Fixed part 27: Fixed part 31: Extrusion fixing plate 32: Female screw part 33: Push rod part 34: Fixed part 35: Fixed part 36: Fixed part 37: Fixed part 38: Extrusion tool 41: Installation space

Claims

1. A removal jig for a coupling part fitted to one end of a cylinder, a pair of fixing plates that can clamp and fix the coupling component by freely adjusting the distance between the fixing plates that face each other; a pusher that can contact the one end of the cylinder and push out the cylinder, The fixing plate comprises a push-receiving fixing plate on one side and a push-out fixing plate on the other side, the pressure receiving and fixing plate has a slit that allows the cylinder to slide via the axis of the cylinder and the side surface of the pressure receiving and fixing plate, so that the coupled part is sandwiched between the pair of fixing plates, the push-out fixing plate has a female screw portion that is screwed into the push-out tool and penetrates a main surface thereof, The removal jig is characterized in that the push-out tool has a push rod portion with a male screw portion that is threadedly engaged with the female screw portion and can push out one end of the cylinder by rotating it.

2. 2. The removal jig according to claim 1, wherein the pressure receiving and fixing plate has a guide that extends from the tip of the slit in the direction in which the cylinder is disposed and is capable of supporting the cylinder.

3. 3. The removal jig according to claim 1, wherein the cylinder is used to raise or lower a chair or a table.

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