Supported devices

Abstract

To provide a support device capable of simply performing fixing work.SOLUTION: A support device 3 includes a support rod 4, a main body 5, pressurization means 6, and pressurization adjustment means 7. The main body 5 has a guide hole 5a into which the support rod 4 is inserted and a pressure chamber 5c surrounding an inner peripheral surface of the guide hole 5a, where a pressure of a medium in the pressure chamber 5 causes a partition wall 5d separating the guide hole 5a and the pressure chamber 5c to press the support rod 4. The pressurization means 6 includes a first piston chamber 5e leading to the pressure chamber 5c, a first piston 10 that slides in the first piston chamber 5e, and a pressurization screw 17 to slide the first piston 10. An abutting part 9a to abut on an abutting target part 5f of the main body 5 is provided in the pressurization screw 17 so as to restrict movement to a push-in side of the first piston 10. The pressurization adjustment means 7 has a second piston chamber 5g leading to the pressure chamber 5c, a second piston 12 that slides in the second piston chamber 5g, and an adjustment screw 13 to slide the second piston 12.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a support device in which a support rod is fixed by the pressure of a medium such as oil, and an object to be supported is supported by the support rod. [Background technology]

[0002] Conventionally, there has been a friction clamp device as a clamp device that uses hydraulic pressure for fastening (see, for example, Patent Document 1). As shown in Fig. 14, this clamp device 51 has a plurality of sleeves 53, 53 fitted around the outside of a rod 52, and rams 54, 54 fitted around the outside of the sleeves 53, 53, with oil chambers 55, 55 provided between the sleeves 53, 53 and the rams 54, 54. By applying hydraulic pressure to the oil chambers 55, 55 via oil passages 56, 56, frictional force is generated between the rod 52 and the sleeves 53, 53, fastening the rod 52 and the sleeves 53, 53 to each other, and the fastening state is released by lowering the hydraulic pressure. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 2-78804 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the conventional friction clamp device 51, if the applied oil pressure is too low, the rod 52 and the sleeves 53, 53 cannot be firmly fixed together, and if the oil pressure is too high, there is a risk of the sleeves 53, 53 or the rams 54, 54 being damaged. This requires proper management of the oil pressure each time fixing is performed, which is troublesome.

[0005] SUMMARY OF THE PRESENTING EMBODIMENT The present invention has been made to solve the above-mentioned drawbacks of the conventional art, and has an object to provide a support device which allows the fixing operation to be easily performed. [Means for solving the problem]

[0006] In order to achieve the above object, the supporting device according to the present invention has the following configuration. The support device according to the invention described in claim 1 comprises a support rod for supporting an object to be supported, a main body, a pressurizing means, and a pressure adjusting means separate from the pressurizing means. Here, the main body comprises a guide hole that opens on one side facing the object to be supported and into which the support rod is inserted to guide the support rod in the axial direction facing the one side and the other side, and a pressure chamber provided to surround the inner circumferential surface of the guide hole, and oil sealed in the pressure chamber is or Grease Consists of By increasing the pressure of the medium, a partition wall separating the guide hole and the pressure chamber can press the support rod to fix the support rod. The pressurizing means includes a first piston chamber provided in the main body and communicating with the pressure chamber, a pressurizing member having a first piston that slides within the first piston chamber, and an actuating means for moving the pressurizing member. The pressure applying means includes a pressure applying female screw portion provided on the main body, and the pressure applying member includes, in addition to the first piston, a pressure applying male screw portion that screws into the pressure applying female screw portion and rotates to slide the first piston. Thus, the pressure applying female screw portion and the pressure applying male screw portion function as the actuation means. Here, the main body is provided with an abutment portion so as to limit the movement of the first piston toward the pushing side, and the pressurizing member is provided with an abutment portion that abuts against the abutment portion. The pressurization adjustment means includes a second piston chamber provided in the main body and communicating with the pressure chamber, a second piston that slides within the second piston chamber, an adjustment female thread portion provided in the main body, and an adjustment screw that has an adjustment male thread portion that screws into the adjustment female thread portion and slides the second piston by rotating. The main body includes an auxiliary member in which the pressure female thread portion and the adjustment female thread portion are provided, and the guide hole, the pressure chamber, the first piston chamber, and the second piston chamber are provided on the side excluding the auxiliary member. A threaded hole in which the pressure female thread portion is formed passes through the auxiliary member and is aligned with the front side of the first piston chamber, and a threaded hole in which the adjustment female thread portion is formed passes through the auxiliary member and is aligned with the front side of the second piston chamber. With the sliding position of the second piston adjusted by the adjustment screw, the pressurizing member is moved by the operating means until the abutting portion comes into contact with the abutted portion, causing the first piston to slide toward the pushing side, setting the pressure of the medium to a predetermined pressure, and fixing the support rod.The pressurizing member is then moved by the operating means so that the abutting portion moves away from the abutted portion, causing the first piston to slide toward the return side opposite the pushing side, reducing the pressure of the medium and releasing the fixation of the support rod.

[0007] According to this support device, the support device includes a pressure adjustment means in addition to the pressure means. Then, in a state where the pressure adjustment means has been adjusted, the pressure member is moved until the abutting portion abuts against the abutted portion, so that the medium sealed in the pressure chamber reaches a predetermined pressure, and the support rod can be fixed. Here, the adjustment by the pressure adjustment means, which is performed in advance, is performed by rotating the adjustment screw so that the pressure of the medium reaches a predetermined pressure in a state where the abutting portion abuts against the abutted portion. In this way, if the adjustment screw is rotated in advance to adjust the pressure of the medium, when fixing the support rod, it is sufficient to move the pressure member until the abutting portion abuts against the abutted portion, and the fixing operation of the support rod can be easily performed, and ultimately the supported object can be easily supported.

[0008] The supporting device according to the invention recited in claim 2 is the supporting device recited in claim 1, The threaded hole in which the pressurizing female thread portion is formed has a diameter larger than that of the first piston chamber, and the edge end surface in which the first piston chamber is formed serves as the abutted portion.

[0009] The support device according to the invention recited in claim 3 is the support device recited in claim 1 or 2, A cover member that covers the adjustment screw is removably attached to the auxiliary member, whereby adjustment can be made using the adjustment screw by removing the cover member from the main body, and by attaching the cover member to the main body after adjustment, the operator can prevent inadvertent turning of the adjustment screw.

[0010] The supporting device according to the invention recited in claim 4 is 3 In the supporting device according to the present invention, The covering member covers the adjusting screw but has a hole serving as a window formed in that portion so as not to cover the pressure screw.

[0011] The support device according to the invention recited in claim 5 is the support device recited in claim 1 or 2, The first piston chamber and the second piston chamber face in a direction perpendicular to the axial direction of the guide hole and are positioned so as to be aligned in the axial direction.

[0012] The support device according to the invention recited in claim 6 is the support device recited in claim 1 or 2, The pressure adjustment means includes an adjustment spring member that biases the adjustment screw in the axial direction of the adjustment screw directly or via the second piston. The adjustment spring member biases the adjustment screw in the axial direction, so that the adjustment screw can be prevented from easily rotating from its position due to vibration or the like, even when the pressure of the medium is reduced and the support rod is released from its fixed state.

[0013] The supporting device according to the invention of claim 7 is the supporting device according to claim 1 or 2, wherein the main body comprises a main body portion and an inner cylinder body attached to the main body portion. Here, the inner cylinder body comprises an inner cylinder body having the partition wall, the inside of which constitutes the guide hole, the main body portion has an accommodation hole into which the inner cylinder body is inserted, and the pressure chamber is formed between the inner peripheral surface of the accommodation hole and the outer peripheral surface of the inner cylinder body. Effect of the Invention

[0014] According to the support device of the present invention, if the pressure of the medium is adjusted in advance by rotating the adjustment screw, then when fixing the support rod, it is sufficient to move the pressure member until its contact portion contacts the contacted portion, and the fixing operation of the support rod can be easily performed. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is an exploded perspective view of an embodiment of the present invention. [Diagram 2] FIG. 13 is a perspective view of the same when the support rod is fixed. [Diagram 3] This is also a front view. [Figure 4] FIG. [Diagram 5] 4 is a cross-sectional view taken along line AA in FIG. [Figure 6] 4 is a cross-sectional view taken along line BB in FIG. [Figure 7] 4 is a cross-sectional view taken along line CC in FIG. [Figure 8] FIG. 6 is a view similar to that of FIG. 5 when the support rod is released. [Figure 9] FIG. 11 is a perspective view showing a first example of use. [Figure 10] This is also a front view. [Figure 11] FIG. 11 is a perspective view showing a second example of use of the same. [Figure 12] FIG. [Figure 13] FIG. 11 is a vertical cross-sectional view showing a third example of use of the same. [Figure 14] FIG. 1 is a cross-sectional view showing a conventional friction clamp device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0017] 1 to 13 show an embodiment of the present invention. In the drawings, reference numeral 1 denotes an object to be attached such as a jig base (jig plate), an MC pallet, or a machine table. Reference numeral 2 denotes an object to be supported. Reference numeral 3 denotes a support device.

[0018] The support device 3 includes a support rod 4 that supports the supported object 2, a main body 5, a pressurizing means 6, and a pressurization adjustment means 7 that is separate from the pressurizing means 6. The main body 5 includes a guide hole 5a that opens on one side toward the supported object 2 and into which the support rod 4 is inserted and that guides the support rod 4 in an axial direction 5b facing the one side and the other side, and a pressure chamber 5c that is provided to surround the inner circumferential surface of the guide hole 5a, and by increasing the pressure of a medium such as oil or grease sealed in the pressure chamber 5c, a partition wall 5d that separates the guide hole 5a and the pressure chamber 5c presses the support rod 4, thereby making it possible to fix the support rod 4 (more specifically, to fix it to the main body 5).

[0019] Here, the pressurizing means 6 includes a first piston chamber 5e provided in the main body 5 and communicating with the pressure chamber 5c, a pressurizing member 9 having a first piston 10 that slides in the first piston chamber 5e, and an operating means 11 that moves the pressurizing member 9. The main body 5 is provided with a contact portion 5f so as to restrict the movement of the first piston 10 toward the pushing side, and the pressurizing member 9 is provided with a contact portion 9a that contacts the contact portion 5f. The first piston 10 is provided with packings 10a, 10a such as O-rings on its outer periphery.

[0020] The pressurization adjustment means 7 includes a second piston chamber 5g provided in the main body 5 and communicating with the pressure chamber 5c, a second piston 12 sliding in the second piston chamber 5g, an adjustment female thread portion 5h provided in the main body 5, and an adjustment screw 13 having an adjustment male thread portion 13a that screws into the adjustment female thread portion 5h and rotates to slide the second piston 12. The second piston 12 is provided with packings 12a, 12a such as O-rings on its outer periphery.

[0021] Therefore, with the sliding position of the second piston 12 adjusted by the adjustment screw 13, the pressurizing member 9 is moved by the operating means 11 until the contact portion 9a comes into contact with the abutted portion 5f, thereby sliding the first piston 10 to the pushing side, setting the pressure of the medium to a predetermined pressure, and fixing the support rod 4 (specifically, fixing to the main body 5) (see FIG. 5). Also, by moving the pressurizing member 9 by the operating means 11 so that the contact portion 9a moves away from the abutted portion 5f, the first piston 10 slides to the return side opposite the pushing side, reducing the pressure of the medium, and releasing the fixing of the support rod 4 (see FIG. 8).

[0022] In detail, the main body 5 includes a fixing means 14 for fixing to the mounting target body 1 on which the support device 3 is disposed. The main body 5 includes a main body portion 15 and an inner cylinder body 16 attached to the main body portion 15. Here, the inner cylinder body 16 includes an inner cylinder body 16x having the partition wall 5d, and the inside of the inner cylinder body 16x constitutes the guide hole 5a, and the main body portion 15 includes a receiving hole 15a into which the inner cylinder body 16x is inserted. The pressure chamber 5c is formed between the inner peripheral surface of the receiving hole 15a and the outer peripheral surface of the inner cylinder body 16x. Then, a packing 5i such as an O-ring is provided on both sides of the pressure chamber 5c between the main body portion 15 and the inner cylinder body 16 so that the pressure chamber 5c is sealed. The reference symbol 5j in the figure indicates a backup ring that receives the packing 5i.

[0023] The pressure applying means 6 includes a pressure applying female screw portion 5k provided on the main body 5. The pressure applying member 9 includes, in addition to the first piston 10, a pressure applying screw 17 having a pressure applying male screw portion 17a that screws into the pressure applying female screw portion 5k and slides the first piston 10 by rotating. The pressure applying female screw portion 5k and the pressure applying male screw portion 17a constitute the actuation means 11.

[0024] Specifically, the support rod 4 is formed in a cylindrical shape, and a screw hole 4a is formed on the side supporting the supported object 2 (the upper side in the illustrated embodiment). An escape hole 4b for escaping a head 32a of a mounting bolt 32 (described later) and a spring receiving hole 4c for receiving a support rod spring member 33 (described later) are formed vertically side by side on the side opposite to the screw hole 4a (the lower side in the illustrated embodiment). A ring-shaped groove 4d is formed on the outer circumferential surface of the support rod 4 (more specifically, the outer circumferential surface of the base end), and a packing 4e such as an O-ring is fitted into the groove 4d, and the packing 4e provides an appropriate resistance to the movement of the support rod 4 between the inner circumferential surface of the guide hole 5a.

[0025] As described above, the main body 5 includes the main body portion 15 and the inner cylinder body 16, and further, the main body portion 15 includes an outer cylinder body 18 and a base 19. Here, the inner cylinder body 16 has a flange portion 16a on one side (upper side in the illustrated embodiment), and this flange portion 16a is fixed to the outer cylinder body 18 (main body portion 15) by using a fastener 20 such as a screw.

[0026] The outer cylinder body 18 includes a cylindrical outer cylinder main body 21 and an auxiliary member 22, and the auxiliary member 22 is fixed to the outer cylinder main body 21 using a fastener 23 such as a screw. The outer cylinder main body 21 is formed with the first piston chamber 5e and the second piston chamber 5g. These piston chambers 5e and 5g are oriented in a direction perpendicular to the axial direction 5b of the guide hole 5a and are positioned so as to be aligned in the axial direction 5b. The outer cylinder main body 21 is provided with a first passage 21a that communicates the first piston chamber 5e with the pressure chamber 5c (see FIG. 6), and similarly, a second passage 21b that communicates the second piston chamber 5g with the pressure chamber 5c (see FIG. 7). That is, the first piston chamber 5e communicates with the pressure chamber 5c via the first passage 21a, and the second piston chamber 5g communicates with the pressure chamber 5c via the second passage 21b. The outer cylinder body 21 is provided with a filling port 21c for filling the pressure chamber 5c with the medium at a position opposite the first passage 21a and at a position opposite the second passage 21b, and the filling port 21c is blocked by a steel ball 24 and a set screw 25. Furthermore, a plate 26 is attached so as to cover the set screw 25 (see Figures 6 and 7).

[0027] The auxiliary member 22 includes the above-mentioned pressurizing female screw portion 5k and the adjustment female screw portion 5h. In detail, the threaded hole in which the pressurizing female screw portion 5k is formed penetrates the auxiliary member 22, has a larger diameter than the first piston chamber 5e, and is aligned with the first piston chamber 5e on the same axis as the first piston chamber 5e and is arranged to be aligned with the front side of the first piston chamber 5e. Similarly, the threaded hole in which the adjustment female screw portion 5h is formed penetrates the auxiliary member 22, has a larger diameter than the second piston chamber 5g, and is arranged to be aligned with the second piston chamber 5g on the same axis as the second piston chamber 5g and is arranged to be aligned with the front side of the second piston chamber 5g.

[0028] The pressure screw 17 has a head 17b on which the pressure male screw portion 17a is formed, and a shaft portion 17c that is smaller in diameter than the head 17b and extends rearward, and the shaft portion 17c enters the first piston chamber 5e and acts to push the first piston 10. The edge surface of the outer cylinder body 21 on which the first piston chamber 5e is formed becomes the aforementioned abutted portion 5f, and the step portion from the head 17b to the shaft portion 17c in the pressure screw 17 becomes the aforementioned abutting portion 9a. The pressure screw 17 has an engagement portion 17d (in the illustrated embodiment, a hexagonal hole for engagement with a tool such as an L wrench) on the head 17b to rotate the pressure screw 17.

[0029] The adjusting screw 13 has a head 13b on which an adjustment male thread portion 13a is formed, and a shaft portion 13c that is smaller in diameter than the head 13b and extends rearward, and the shaft portion 13c enters the second piston chamber 5g and acts to push the second piston 12. The adjusting screw 13 has an engagement portion 13d on its head 13b with which a tool engages in order to rotate the adjusting screw 13 (in the illustrated embodiment, a hexagonal hole with which a tool such as an L wrench engages).

[0030] The pressurization adjustment means 7 also includes an adjustment section spring member 27 that urges the adjustment screw 13 in the axial direction of the adjustment screw 13 directly or via the second piston 12 (via the second piston 12 in the illustrated embodiment). In detail, the adjustment section spring member 27 is made of a compression coil spring, and is inserted into the second piston chamber 5g so as to urge the second piston 12 in the return direction, and the second piston 12, pressed by the adjustment section spring member 27, presses the adjustment screw 13, whereby the adjustment screw 13 is urged in the axial direction.

[0031] Also in the first piston chamber 5e, a pressure portion spring member 28 made of a compression coil spring is inserted into the first piston chamber 5e so as to urge the first piston 10 in the return direction.

[0032] Further, a cover member 29 that covers the adjustment screw 13 is removably attached to the main body 5 (auxiliary member 22 in the illustrated embodiment). More specifically, the cover member 29 is attached to the auxiliary member 22 using fasteners 30 such as screws. This cover member 29 is formed in a plate shape (more specifically, a disk shape) and covers the adjustment screw 13, but has a hole 29a that serves as a window in that portion so as not to cover the pressure screw 17 (particularly the engagement portion 17d of the pressure screw 17).

[0033] The base 19 is located on the other side (the lower side in the illustrated embodiment) of the main body 5, and is fixed to the outer cylinder 18 (more specifically, the outer cylinder main body 21) using fasteners 31 such as screws. The base 19 is formed in a short cylinder shape with a bottom, and its inside communicates with the inside of the inner cylinder 16 (more specifically, the inner cylinder main body 16x), and the guide hole 5a is formed by these insides. The base 19 is also provided with a mounting bolt 32, and the head 32a of the mounting bolt 32 is located within the base 19, and the threaded portion 32b protrudes downward from the bottom wall 19a of the base 19. Thus, the mounting bolt 32 serves as the fixing means 14 described above.

[0034] The support device 3 also includes a spring member 33 for the support rod that biases the support rod 4 toward the one side of the guide hole 5a (i.e., the side where the guide hole 5a is open). In detail, the spring member 33 for the support rod is made of a compression coil spring, and is disposed in the guide hole 5a between the mounting bolt 32 and the support rod 4.

[0035] 9 to 13 show examples of use of the support device 3. In a first example of use shown in Figs. 9 and 10, a support object 2 (e.g., a workpiece to be processed such as by cutting) on ​​an attachment object 1 is supported from below by three support columns 41, 41 and the support device 3. At this time, in the support device 3, the support rod 4 is biased by a support rod spring member 33 (not shown) to contact the support object 2, and the support rod 4 is fixed at that position by rotating the pressure screw 17 (not shown) to set the pressure of the medium sealed in the pressure chamber 5c (not shown) to a predetermined pressure. Then, the support object 2 is pressed from above by the presser plates 42a, 42a of the four clamps 42, 42, so that the support object 2 is fixed.

[0036] In a second use example shown in Figs. 11 and 12, the supported object 2 is supported on the support rod 4 via a fixture 43 serving as an adapter. In detail, the fixture 43 has a substantially U-shaped fixture body 43a. A bolt 44 is passed through a through hole 43b provided in the fixture body 43a and screwed into a screw hole 4a of the support rod 4, thereby fixing the fixture body 43a (fixing device 43) to the support rod 4. A receiving portion 43d is provided on a lower piece 43c of the substantially U-shaped fixture body 43a, and a set screw 43f is provided on an upper piece 43e. The receiving portion 43d and the set screw 43f grip the supported object 2, thereby fixing the supported object 2 to the fixture 43 and, ultimately, to the support rod 4. In this way, by fixing the support rod 4 to the main body 5 after grasping the support object 2 with the fixing device 43, the support object 2 can be held in its position without applying a load that would cause distortion to the support object 2.

[0037] 13, the support rod 4 has a through hole 4f that reaches the relief hole 4b instead of the screw hole 4a. This through hole 4f is a stepped hole whose upward opening is a small diameter hole 4g. The supported object 2 is placed on the support rod 4 and supported, and further, a bolt 45 is passed through the small diameter hole 4g ​​from the inside of the support rod 4 and screwed into the screw hole 2a provided in the supported object 2, thereby fixing the supported object 2 to the support rod 4.

[0038] Next, the effect of the support device 3 having the above configuration will be described. According to this support device 3, the support device 3 includes a pressure adjustment means 7 in addition to the pressure means 6. Then, in a state where the pressure adjustment means 7 has been adjusted, the pressure member 9 is moved until the abutting portion 9a abuts against the abutted portion 5f of the main body 5, so that the medium sealed in the pressure chamber 5c reaches a predetermined pressure, and the partition wall 5d presses the support rod 4, thereby fixing the support rod 4 (specifically, fixing the support rod 4 in the axial direction 5b of the guide hole 5a and in the direction around the axis of the guide hole 5a). Here, the adjustment by the pressure adjustment means 7, which is performed in advance, is performed by inserting the support rod 4 into the guide hole 5a, and rotating the adjustment screw 13 so that the pressure of the medium becomes a predetermined pressure in a state where the abutting portion 9a of the pressure member 9 abuts against the abutted portion 5f of the main body 5 (see FIG. 5). In this way, if the pressure of the medium is adjusted in advance by rotating the adjustment screw 13, then in order to fix the support rod 4, it is sufficient to move the pressure applying member 9 until its abutment portion 9a abuts against the abutted portion 5f, which simplifies the fixing operation of the support rod 4 and ultimately makes it possible to easily support the supported object 2.

[0039] The pressure adjustment means 7 is provided with an adjustment spring member 27, which biases the adjustment screw 13 in the axial direction (biased via the second piston 12 in the illustrated embodiment), thereby preventing the adjustment screw 13 from easily rotating from its position due to vibration or the like, even when the pressure of the medium drops and the support rod 4 is released from its fixed position (see FIG. 8). Furthermore, a cover member 29 that covers the adjustment screw 13 is removably attached to the main body 5. This allows adjustment using the adjustment screw 13 by removing the cover member 29 from the main body 5, and after adjustment, by attaching the cover member 29 to the main body 5, it is possible to prevent the operator from accidentally turning the adjustment screw 13, and the position of the adjustment screw 13 can be maintained.

[0040] Further, a pressurizing part spring member 28 is inserted into the first piston chamber 5e. Thus, when the first piston 10 is slid in the return direction by the operating means 11 to reduce the pressure of the medium, the sliding of the first piston 10 in the return direction can be assisted by the pressurizing part spring member 28, whereby the pressure of the medium can be sufficiently reduced, and thus the fixation of the support rod 4 can be accurately released.

[0041] The present invention is not limited to the above-described embodiment, and various other modifications are possible. For example, the main body 15 and the inner cylinder 16 do not have to be separate bodies, but may be integrated with each other by welding or the like. Also, the main body 5 may not have the inner cylinder 16, and the pressure chamber 5c and the partition wall 5d may be provided in the main body 15 itself.

[0042] Furthermore, the pressure chamber 5c may be provided between the inner peripheral surface of the receiving hole 15a in the main body 15 and the outer peripheral surface of the inner cylinder body 16 (specifically, the inner cylinder body 16x), or may be provided, for example, inside the inner cylinder body 16 (specifically, the inner cylinder body 16x) itself, that is, within the thickness of the inner cylinder body 16x. In other words, the inner walls of the inner cylinder body 16x that sandwich the pressure chamber 5c may be the partition wall 5d.

[0043] In addition, the first piston 10 and the pressure screw 17 are formed separately, but may be formed integrally or connected to each other. Similarly, the second piston 12 and the adjustment screw 13 are formed separately, but may be formed integrally or connected to each other.

[0044] Furthermore, the abutting portion 9a is provided on the pressure screw 17, but for example, the tip of the first piston 10 may become the abutting portion 9a, and the abutted portion 5f may be provided on the main body 5 so as to face the tip that becomes the abutting portion 9a. Furthermore, when the pressure part spring member 28 is provided as in the illustrated embodiment, the pressure part spring member 28 may be fully compressed to limit the movement of the first piston 10 toward the pushing side. In other words, the pressure part spring member 28 may be included in the pressure member 9, and the pressure part spring member 28 may be included in the main body 5, and one of the opposing portions of the spiral of the pressure part spring member 28 may become the abutting portion 9a and the other may become the abutted portion 5f.

[0045] Further, the pressure member 9 includes a pressure screw 17 having a pressure male screw portion 17a in addition to the first piston 10, and the operating means 11 includes the pressure female screw portion 5k provided on the main body 5 and the pressure male screw portion 17a, but instead of including the pressure female screw portion 5k or the pressure screw 17 having the pressure male screw portion 17a, for example, the first piston 10 itself may be the pressure member 9 having the abutment portion 9a, and the operating means 11 may be a hydraulic means for pushing the first piston 10 from the front to the pushing-in side. In this way, by moving the first piston 10 (pressure member 9) by hydraulic means, the first pistons 10 (pressure members 9) can be moved simultaneously for the multiple support devices 3, 3 using a common hydraulic means, and the multiple support rods 4, 4 can be fixed simultaneously.

[0046] Furthermore, the main body 5 is provided with a fixing means 14 for fixing to the mounting object 1 on which the support device 3 is disposed, and this fixing means 14 consists of a mounting bolt 32 protruding from the bottom wall 19a of the base 19, but instead of providing this mounting bolt 32, a flange protruding laterally from the base 19 (main body 5) may be provided and a hole through which the bolt passes may be drilled in the flange, so that the flange serves as the fixing means 14. Furthermore, this fixing means 14 may not be necessary in some cases.

[0047] Furthermore, the pressure adjustment means 7 includes an adjustment section spring member 27, which biases the adjustment screw 13 via the second piston 12, but may also bias the adjustment screw 13 directly without via the second piston 12. Furthermore, this adjustment section spring member 27 may be omitted if it is not necessary.

[0048] Further, the pressure applying portion spring member 28 is inserted into the first piston chamber 5e, but this pressure applying portion spring member 28 may be omitted if it is not necessary.

[0049] Furthermore, the inner cylinder 16 has a flange 16a for fixing to the outer cylinder 18 (main body 15), but if there is another fixing method, this flange 16a may be omitted. [Explanation of symbols]

[0050] 1. Mounting object 2. Support Object 3 Support device 4 Support Rod 5. Main unit 5a Guide hole 5b Axial direction 5c Pressure chamber 5d bulkhead 5e First piston chamber 5f Contacted part 5g Second piston chamber 5h Adjustment female screw 5k Pressure female thread 6 Pressurizing means 7 Pressure adjustment means 9 Pressure Member 9a Contact part 10 First piston 11. Actuation means 12 Second piston 13 Adjustment screw 13a Adjustment male screw 14 Fixing means 15 Main body 15a Receiving hole 16 Inner cylinder 16x Inner Cylinder Body 17 Pressure screw 17a Pressure male thread 22 Auxiliary Materials 27 Spring member for adjustment part 29 Covering material 29a hole 33 Spring member for support rod

Claims

1. A support device including a support rod for supporting an object to be supported, a main body, a pressurizing means, and a pressurizing adjustment means separate from the pressurizing means, the main body is provided with a guide hole that opens on one side toward the supported object, into which the support rod is inserted and that guides the support rod in the axial direction facing the one side and the other side, and a pressure chamber that is provided to surround the inner circumferential surface of the guide hole, and by increasing the pressure of a medium consisting of oil or grease sealed in the pressure chamber, a partition wall that separates the guide hole and the pressure chamber presses against the support rod, thereby enabling the support rod to be fixed; The pressurizing means includes a first piston chamber provided in the main body and communicating with the pressure chamber, a pressurizing member having a first piston that slides in the first piston chamber, and an actuating means for moving the pressurizing member; The pressure applying means includes a pressure applying female screw portion provided on the main body, The pressure member includes, in addition to the first piston, a pressure screw having a pressure male screw portion that screws into the pressure female screw portion and slides the first piston by rotating, The pressure female screw portion and the pressure male screw portion constitute the actuation means, The main body is provided with a contact portion so as to limit the movement of the first piston toward the pushing side, and the pressing member is provided with a contact portion that contacts the contact portion, the pressure adjustment means includes a second piston chamber provided in the main body and communicating with the pressure chamber, a second piston sliding in the second piston chamber, an adjustment female screw portion provided in the main body, and an adjustment screw having an adjustment male screw portion screwed into the adjustment female screw portion and rotating to slide the second piston, the main body includes an auxiliary member provided with the pressure female screw portion and the adjustment female screw portion, and the guide hole, the pressure chamber, the first piston chamber, and the second piston chamber are provided on a side excluding the auxiliary member; The threaded hole in which the pressure female screw portion is formed penetrates the auxiliary member and is arranged to be aligned with a front side of the first piston chamber, and the threaded hole in which the adjustment female screw portion is formed penetrates the auxiliary member and is arranged to be aligned with a front side of the second piston chamber, With the slide position of the second piston adjusted by the adjustment screw, the pressurizing member is moved by the actuation means until the abutting portion abuts the abutted portion, thereby sliding the first piston toward the pushing side, setting the pressure of the medium to a predetermined pressure, and fixing the support rod; A support device in which the pressurizing member is moved by the operating means so that the abutting portion moves away from the abutted portion, thereby sliding the first piston to the return side opposite the pushing side, thereby reducing the pressure of the medium and releasing the fixation of the support rod.

2. A support device as described in claim 1, wherein the screw hole in which the pressurized female screw portion is formed has a larger diameter than the first piston chamber, and the edge end surface in which the first piston chamber is formed becomes the abutted portion.

3. A support device as described in claim 1 or 2, wherein a cover member covering the adjustment screw is removably attached to the auxiliary member.

4. A support device as described in Claim 3, wherein the covering member covers the adjustment screw but has a hole formed in that portion to serve as a window so as to not cover the pressure screw.

5. A support device as described in claim 1 or 2, wherein the first piston chamber and the second piston chamber face in a direction perpendicular to the axial direction of the guide hole and are positioned so as to be aligned in the axial direction.

6. A support device as described in claim 1 or 2, wherein the pressure adjustment means includes a spring member for an adjustment section which urges the adjustment screw in the axial direction of the adjustment screw directly or via the second piston.

7. The main body includes a main body portion and an inner cylinder body attached to the main body portion, the inner cylinder body includes an inner cylinder main body having the partition wall, the inside of the inner cylinder main body forming the guide hole, The main body portion has an accommodation hole into which the inner cylinder main body is inserted, The support device according to claim 1 or 2, wherein the pressure chamber is formed between an inner peripheral surface of the receiving hole and an outer peripheral surface of the inner cylinder body.

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