Pressurizing device

Abstract

Provided is a pressurizing device capable of suppressing unevenness in surface pressure on a pressurized surface of an object to be acted. A pressurizing device (1) is provided with: a base body (2); and a movable body (3) that is driven to advance and retreat with respect to the base body (2) and that pressurizes the body (W) to be acted, the pressurizing device (1) having an elastic body (5) that is disposed between the distal end surface (34b) of the movable body (3) and the surface (W1) to be pressurized of the body (W) to be acted.

Description

Technical Field

[0001] The present invention relates to a pressurizing device for pressurizing an object to be acted on. Background Art

[0002] As a pressurizing device that pressurizes an object to be acted on using the pressure of a fluid, there is a pressurizing device using a cylinder device, which can pressurize the object to be acted on by causing a piston to move in a cylinder body by withstanding the pressure of the fluid.

[0003] For example, the pressurizing device of Patent Document 1 includes a cylinder device, a pump, and an accumulator. By supplying pressurized fluid from the pump or the accumulator to the cylinder device, the piston moves relative to the inside of the cylinder body to pressurize the object to be acted on.

[0004] Prior Art Documents

[0005] Patent Documents

[0006] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2021-20224 (page 5, Figure 1 ) Summary of the Invention

[0007] Problems to be Solved by the Invention

[0008] In the pressurizing device of Patent Document 1, a plunger head having a diameter larger than the diameter of the rod of the piston is attached to the front end of the rod of the piston, and the plunger head is used to stably pressurize the pressurized surface of the object to be acted on over a large area. On the other hand, from the viewpoints of installation space and weight, it is necessary to reduce the thickness of the plunger head. However, when the thickness of the plunger head is reduced, the plunger head may be locally deformed due to the pressure of the pressurized fluid, resulting in uneven surface pressure, and there is a possibility that the object to be acted on cannot be stably pressurized due to the relative inclination between the object to be acted on and the piston.

[0009] The present invention has been made in view of such problems, and an object thereof is to provide a pressurizing device that can suppress uneven surface pressure on the pressurized surface of an object to be acted on and perform pressurization.

[0010] Means for Solving the Problems

[0011] To solve the above problems, the pressurizing device of the present invention includes: a base; and a movable body that moves forward and backward relative to the base to pressurize an object to be acted on, wherein the pressurizing device has an elastic body disposed between the front end surface of the movable body and the pressurized surface of the object to be acted on.

[0012] Thereby, it is possible to disperse the stress acting on the front end surface of the movable body using the elastic body, and thus it is possible to suppress uneven surface pressure on the pressurized surface of the object to be acted on and perform pressurization.

[0013] Alternatively, the pressing device may have a pressing plate disposed between the elastic body and the surface to be pressed.

[0014] Thereby, uneven surface pressure can be effectively suppressed and pressing can be performed stably.

[0015] Alternatively, the pressing device may have a locking portion that locks the front end surface of the movable body to the pressing plate.

[0016] Thereby, excessive separation between the front end surface of the movable body and the pressing plate can be restricted, and thus the elastic body will not be affected.

[0017] Alternatively, a closed space may be formed between the front end surface of the movable body and the pressing plate, and the elastic body may be disposed within the closed space.

[0018] Thereby, the elastic body will not leak outwards from the closed space during pressing, and the pressing force can be efficiently transmitted to the surface to be pressed.

[0019] Alternatively, the movable body may be driven to move forward and backward by the pressure of gas provided in a pressure space disposed between the movable body and the base body.

[0020] Thereby, even if the pressure of the gas in the pressure space fluctuates, uneven surface pressure on the surface to be pressed of the object to be acted upon can be suppressed and pressing can be performed.

[0021] Alternatively, the thickness of the central portion of the front end plate portion of the movable body may be thicker than the thickness of the outer edge portion.

[0022] Thereby, even if stress is applied to the front end plate portion, the front end plate portion will deform evenly, and uneven surface pressure on the surface to be pressed can be suppressed and pressing can be performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a longitudinal sectional view showing the contracted state of the pressing device according to Embodiment 1 of the present invention.

[0024] Figure 2 is a longitudinal sectional view showing the extended state of the pressing device according to Embodiment 1.

[0025] Figure 3 is a longitudinal sectional view showing the vicinity of the pressing portion in the contracted state of the pressing device.

[0026] Figure 4 is a longitudinal sectional view showing the pressing device according to Embodiment 2 of the present invention.

[0027] Figure 5 is a longitudinal sectional view showing the pressing device according to Embodiment 3 of the present invention.

[0028] Figure 6It is a longitudinal sectional view showing the pressing device of Embodiment 4 of the present invention. Detailed Description

[0029] Hereinafter, the method for implementing the pressing device for implementing the present invention will be described based on the embodiments.

[0030] Embodiment 1

[0031] Refer to Figures 1 to 3 The pressing device of Embodiment 1 will be described. Hereinafter, Figure 1 the left side of the paper surface will be set as the right side (sometimes also referred to as the front end face side) of the pressing device, and Figure 1 the right side of the paper surface will be set as the left side (sometimes also referred to as the back side) of the pressing device for description. And, Figure 1 the up and down of the paper surface will be set as the up and down of the pressing device for description.

[0032] As Figure 1 shown, the pressing device 1 presses the object to be acted on W using the pressure of the fluid. Regarding the object to be acted on W in this embodiment, the case where it is arranged on the right side of the pressing device 1 and the position of the pressed surface W1 changes in the axial direction, that is, Figure 1 the left - right direction of the paper surface, according to the use state will be described.

[0033] In addition, in this embodiment, an example is given of the method in which the pressing device 1 presses the object to be acted on W using the pressure of the fluid. However, for example, the pressing device may also be a method of pressing the object to be acted on W by electric drive or the like.

[0034] The pressing device 1 mainly includes a base body 2, a movable body 3, a cylindrical body 4 as a guiding body, an elastic body 5, and a pressing plate 6.

[0035] The base body 2 is composed of a large - diameter portion 21 and a small - diameter portion 22. The large - diameter portion 21 is in the shape of a circular plate, and a through - hole 21a is formed in its central portion. A bolt 7 is installed in the through - hole 21a.

[0036] The small - diameter portion 22 is in the shape of a cylinder and extends to the right from the central portion of the large - diameter portion 21. The left end portion of the small - diameter portion 22 is closed by the large - diameter portion 21, and the right end portion is open on the right side.

[0037] Moreover, on the outer peripheral surface of the right end portion of the small - diameter portion 22, three annular recesses 22a, 22c, 22d that are recessed in the inner - diameter direction are provided separately along the axial direction.

[0038] The left - most annular recess 22a and the central annular recess 22c are formed deeper than the right - most annular recess 22d. And, sealing rings 9 are respectively fitted and arranged in the annular recesses 22a and 22c. In addition, although no sealing ring 9 is fitted in the annular recess 22d, a bearing member called a wear - resistant ring can be provided according to the use.

[0039] The sealing ring 9 can be in the form of an X-ring, an O-ring, a lip seal, etc. Moreover, a plurality of sealing rings 9 are axially arranged, specifically, two are arranged. Therefore, oil hardly leaks into the accumulator portion 10 described later, and the movable body 3 is not easily tilted when the movable body 3 moves.

[0040] Moreover, when the annular recessed portion 22d is a space, it has a gas storage function and an oil storage function. Thereby, the base body 2 and the movable body 3 can prevent gas leakage and slide relative to each other smoothly. In addition, when a wear-resistant ring is provided in the annular recessed portion 22d, the wear-resistant ring can prevent abrasion, reduce eccentricity, and improve the durability of the sealing ring.

[0041] The sealing ring 9 can slide axially relative to the inner peripheral surface 32a of the movable body 3 and restrict the movement of fluid in the axial direction.

[0042] The movable body 3 is composed of an outer diameter side cylindrical portion 31, an inner diameter side cylindrical portion 32, a back plate portion 33, and a front end plate portion 34.

[0043] The diameter of the outer diameter side cylindrical portion 31 is larger than the diameter of the inner diameter side cylindrical portion 32, and it is arranged separated from the inner diameter side cylindrical portion 32 toward the outer diameter side.

[0044] On the outer peripheral surface of the flange 31a extending toward the outer diameter side at the left end portion of the outer diameter side cylindrical portion 31, annular recessed portions 31b and 31c recessed in the inner diameter direction are axially separated and provided. A sealing ring 8 is fitted and arranged in the right annular recessed portion 31b. The left annular recessed portion 31c is shallower than the annular recessed portion 31b and no sealing ring 8 is fitted, but a wear-resistant ring can be provided according to the use.

[0045] The sealing ring 8 can be in the form of an O-ring, an X-ring, a lip seal, etc. Moreover, the annular recessed portion 31c has an oil storage function. Thereby, the movable body 3 can slide smoothly. In addition, as long as the annular recessed portion 31c can improve the slidability, it can be provided at any axial position on the outer peripheral surface of the flange 31a.

[0046] When viewed axially, the inner diameter side cylindrical portion 32 and the outer diameter side cylindrical portion 31 are concentric. The inner diameter side cylindrical portion 32 is shorter than the outer diameter side cylindrical portion 31 in the axial direction.

[0047] The back plate portion 33 connects the left end of the outer diameter side cylindrical portion 31 and the left end of the inner diameter side cylindrical portion 32. When viewed axially, the back plate portion 33 is annular. The back plate portion 33 extends in the radial direction perpendicular to the central axes of the outer diameter side cylindrical portion 31 and the inner diameter side cylindrical portion 32.

[0048] The front end plate portion 34 has a rectangular shape larger than the outer diameter side cylindrical portion 31 when viewed axially, and closes the right end of the outer diameter side cylindrical portion 31. Further, the right end of the front end plate portion 34 is axially separated from the right end of the inner diameter side cylindrical portion 32.

[0049] Further, the joint portion 35 between the front end plate portion 34 and the outer diameter side cylindrical portion 31 has a rounded shape with a curved surface recessed toward the inner diameter side on the outer peripheral surface in a sectional view. In addition, in the present embodiment, the portion of the front end plate portion 34 that protrudes outward from the outer diameter side cylindrical portion 31 is referred to as a stepped portion 34a.

[0050] Further, the front end plate portion 34 is in a thin plate shape. Thus, the movable body 3 can reduce the axial dimension and can obtain a large stroke in a small installation space.

[0051] A small diameter portion 22 of the base body 2 is inserted through the inner diameter side cylindrical portion 32 of the movable body 3 in a relatively movable manner. Thus, a pressure accumulating portion 10 serving as a pressure space is formed between the base body 2 and the movable body 3. The capacity of the pressure accumulating portion 10 changes as the movable body 3 moves as described later (see Figure 2 ).

[0052] A high-pressure gas G is sealed in the pressure accumulating portion 10 from the outside through a gas inlet (not shown) of the bolt 7. In other words, the pressure accumulating portion 10 is a cylindrical gas chamber.

[0053] The left end portion of the cylindrical body 4 is connected and fixed to the outer peripheral surface of the large diameter portion 21 of the base body 2. The inner peripheral surface 4a of the cylindrical body 4 can slide relative to the outer peripheral surface of the flange 31a of the movable body 3 in the axial direction. The movement of the fluid in the axial direction between the inner peripheral surface 4a of the cylindrical body 4 and the outer peripheral surface of the flange 31a of the movable body 3 is restricted by the seal ring 8.

[0054] On the left side of the pressurizing device 1, a space portion 11 is formed by the base body 2, the movable body 3, and the cylindrical body 4. An oil F serving as a lubricating fluid is held in the space portion 11. As described later, the capacity of the space portion 11 changes as the movable body 3 moves (see Figure 2 ).

[0055] A breathing hole 41 is formed in the upper left portion of the cylindrical body 4. That is, the space portion 11 communicates with the external atmospheric space through the breathing hole 41.

[0056] Further, referring to Figure 1 , the end portion 4b on the right side of the cylindrical body 4 protrudes toward the inner diameter side. As described later, the end portion 4b abuts against the stepped portion 34a of the movable body 3 when the movable body 3 moves to the leftmost side. Further, referring to Figure 2 , the end portion 4b abuts against the flange 31a of the movable body 3 when the movable body 3 moves to the rightmost side.

[0057] The elastomer 5 is a sheet-like rubber material with a Shore A hardness of 30. When viewed axially, the elastomer 5 has a rectangular shape and is formed larger than the outer shape of the front end plate portion 34 of the movable body 3. The back surface of the elastomer 5 is fixed to the front end surface 34b of the front end plate portion 34 by means of an adhesive material or the like. In addition, the hardness of the elastomer 5 is preferably 50 or less in Shore A hardness, and more preferably 30 or less in Shore A hardness. That is, the elastomer 5 is preferably of low hardness. In addition, the movable body 3 only needs to be harder than the elastomer 5, and the material can be freely selected.

[0058] The pressing plate 6 is made of metal and is formed larger than the outer shape of the elastomer 5. The back surface of the pressing plate 6 is fixed to the front end surface of the elastomer 5 by means of an adhesive material or the like. And the front end surface of the pressing plate 6 abuts against the pressurized surface W1 of the object to be acted upon W. In addition, the pressing plate 6 is not limited to metal, as long as it is harder than the elastomer 5, it can be freely changed to resin or the like.

[0059] Next, use Figure 1 and Figure 2 to describe the contracted state and the extended state of the pressing device 1. In addition, the base body 2 is fixed to a fixed body (not shown) and is in a stationary state at least in the axial direction, that is, the left-right direction.

[0060] As Figure 1 shown, in the state where the object to be acted upon W is disposed at the leftmost side, it becomes the contracted state of the pressing device 1 in which the movable body 3 moves to the leftmost side. In the contracted state of the pressing device 1, the stepped portion 34a of the movable body 3 abuts against the end portion 4b of the cylindrical body 4, specifically, the right end of the end portion 4b, and the movement of the movable body 3 to the left is restricted.

[0061] In the contracted state of the pressing device 1, within the stroke range of the movable body 3, the capacity of the pressure accumulating portion 10 becomes the minimum, and it becomes the state where the gas G is compressed to the maximum extent. The gas G is restricted from moving to the space portion 11 on the left by the two sealing rings 9.

[0062] The pressure of the gas G in the pressure accumulating portion 10 acts to move the movable body 3 to the right.

[0063] And, in the contracted state of the pressing device 1, the breathing hole 41 of the cylindrical body 4 is disposed at a position to the left of the movable body 3. That is, the breathing hole 41 is not blocked.

[0064] Moreover, a hydrophobic ventilation sheet 41s is provided so as to block the breathing hole 41, which can prevent water from entering the space portion 11 from the outside, and can prevent oil from leaking from the space portion 11 while allowing gas to flow through.

[0065] Moreover, the liquid level of the oil F is located near the lower side of the breathing hole 41. Thereby, the oil F can be supplied to the gap between the outer peripheral surface of the small-diameter portion 22 of the base body 2 and the inner peripheral surface 32a of the movable body 3, and the oil F does not leak from the breathing hole 41 into the atmospheric space.

[0066] As Figure 2 shown, in the state where the position of the pressurized surface W1 of the object to be acted upon W is arranged at the rightmost side, it becomes the extended state of the pressurizing device 1 in which the movable body 3 moves to the rightmost side. In the extended state of the pressurizing device 1, the flange 31a of the movable body 3, specifically the right end surface of the flange 31a, abuts against the end portion 4b of the cylindrical body 4, specifically the left end surface of the end portion 4b, and the movement of the movable body 3 to the right side is restricted.

[0067] In the extended state of the pressurizing device 1, within the stroke range of the movable body 3, the capacity of the pressure accumulating portion 10 becomes the maximum, and it becomes the state where the pressure of the gas G decreases.

[0068] Moreover, in the extended state of the pressurizing device 1, compared with the contracted state of the pressurizing device 1, the movable body 3 moves to the right side, which is the direction away from the breathing hole 41, so the breathing hole 41 is not closed. And the liquid level of the oil F is located below the inner peripheral surface 32a of the inner-diameter-side cylindrical portion 32 of the movable body 3.

[0069] Next, the stroke of the movable body 3 will be described. The movable body 3 makes a stroke according to the position of the pressurized surface W1 of the object to be acted upon W. Specifically, when the object to be acted upon W moves to the right side, the compressed gas G expands, and the movable body 3 follows the object to be acted upon W and relatively moves to the right side with respect to the base body 2. And when the object to be acted upon W moves to the left side, the movable body 3 pressed by it follows the object to be acted upon W and relatively moves to the left side with respect to the base body 2 while compressing the gas G. In this way, by the movable body 3 making a stroke according to the position of the pressurized surface W1, the object to be acted upon W can be continuously pressurized in the axial direction regardless of the position of the object to be acted upon W.

[0070] Moreover, when the movable body 3 makes a stroke, as Figure 1 shown, when the volume of the space portion 11 becomes smaller and the liquid level of the oil F reaches the inner peripheral surface 32a of the inner-diameter-side cylindrical portion 32, the oil F is supplied to the gap between the outer peripheral surface of the small-diameter portion 22 and the inner peripheral surface 32a of the inner-diameter-side cylindrical portion 32.

[0071] Moreover, as Figure 2 shown, when the volume of the space portion 11 becomes larger and the liquid level of the oil F moves away from the inner peripheral surface of the inner-diameter-side cylindrical portion 32, the oil F remaining in the annular recess 22d contributes to the lubricity of the stroke of the movable body 3.

[0072] Also, the oil F within the space portion 11 enters the gap between the outer peripheral surface of the flange 31a of the outer diameter side cylindrical portion 31 and the inner peripheral surface of the cylindrical body 4, and is retained within the annular recess 31c, contributing to the lubricity of the stroke of the movable body 3.

[0073] Next, based on Figure 3 the state near the front end portion of the movable body 3 in the contracted state of the pressing device 1 will be described.

[0074] As Figure 3 shown, in the contracted state of the pressing device 1, the gas G within the pressure accumulating portion 10 is in a state of being compressed to the maximum extent. As described above, due to the relationship of the arranged space, since the front end plate portion 34 of the movable body 3 is formed in a thin plate shape, the central portion of the front end plate portion 34 may bulge to the right due to the pressure of the gas G. Additionally, in Figure 3 for ease of explanation, the deformation diagram of the front end plate portion 34 is shown larger than the actual size.

[0075] The stress acting on the front end plate portion 34 of the movable body 3 is dispersed in the surface direction by the elastic body 5 disposed between the front end plate portion 34 and the pressing plate 6, and is transmitted to the object to be acted upon W with a substantially uniform surface pressure via the pressing plate 6. That is, it is possible to suppress uneven surface pressure on the pressed surface W1 of the object to be acted upon W during pressing. Thereby, the relative inclination between the front end surface of the pressing plate 6 and the pressed surface W1 of the object to be acted upon W is restricted.

[0076] Also, the elastic body 5 is formed larger than the outer shape of the front end plate portion 34 of the movable body 3. In other words, since the elastic body 5 covers the entire front end surface 34b of the front end plate portion 34, it is possible to suppress uneven surface pressure and press the object to be acted upon W without the front end surface 34b of the movable body 3 directly contacting the pressing plate 6.

[0077] Also, a pressing plate 6 is disposed between the elastic body 5 and the pressed surface W1. The pressing plate 6 is harder than the elastic body 5, and the front end surface of the pressing plate 6 is in surface contact with the pressed surface W1 of the object to be acted upon W. The pressing plate 6 transmits the force dispersed by the elastic body 5 to the pressed surface W1 with a substantially uniform surface pressure, so it is possible to further suppress uneven surface pressure on the pressed surface W1 during pressing.

[0078] Also, the movable body 3 is driven to move forward and backward by the pressure of the pressure accumulating portion 10. Even if the pressure within the pressure accumulating portion 10 changes, it is possible to suppress uneven surface pressure on the pressed surface W1 of the object to be acted upon W and perform pressing by utilizing the action of the elastic body 5 as described above.

[0079] Embodiment 2

[0080] Next, referring to Figure 4The pressurizing device of Example 2 will be described. In addition, the description of the structure that is the same as that of the aforementioned Example 1 will be omitted.

[0081] As Figure 4 shown, the front end plate portion 134 of the movable body 103 of the pressurizing device 100 of the present Example 2 is composed of an outer edge portion 134A and a central portion 134B. The central portion 134B is a portion having a thickness in a manner of bulging to the left at the central portion of the front end plate portion 134, that is, bulging to the opposite side of the pressed surface W1 compared with the outer edge portion 134A. When viewed in cross-section, the central portion 134B has a convex shape. And, the outer edge portion 134A is the portion other than the central portion 134B in the front end plate portion 134, and is substantially parallel to the pressing plate 106.

[0082] The elastic body 105 is disposed between the front end plate portion 134 of the movable body 103 and the pressing plate 106 without a gap.

[0083] Accordingly, the plate thickness of the central portion 134B is thicker than that of the outer edge portion 134A, so the rigidity is high. Even if a force is applied to the front end plate portion 134 due to the increase in the pressure of the pressure accumulating portion 10, the deformation of the front end plate portion 134 can be made uniform, the pressing force can be evenly transmitted to the elastic body, and the pressing force can be efficiently transmitted to the pressed surface W1.

[0084] Example 3

[0085] Next, with reference to Figure 5 the pressurizing device of Example 3 will be described. In addition, the description of the structure that is the same as that of the aforementioned Example 1 will be omitted.

[0086] As Figure 5 shown, the pressing plate 206 of the pressurizing device 200 of the present Example 3 has a bottomed cylindrical shape. Specifically, the pressing plate 206 is composed of a bottom plate portion 206A and a cylindrical portion 206B extending from the outer edge of the bottom plate portion 206A to the left. The pressing plate 206 is externally fitted to the front end plate portion 234 of the movable body 203 from the right side.

[0087] The inner peripheral surface of the cylindrical portion 206B can slide on the outer peripheral surface of the front end plate portion 234. The elastic body 205 is disposed without a gap in a substantially closed enclosed space S formed between the front end plate portion 234 of the movable body 203 and the pressing plate 206. That is, the enclosed space S is an enclosed space isolated from the external space, and of course is not limited to a space where fluid cannot flow between the external space.

[0088] And, the axial length L10 of the cylindrical portion 206B is formed to be longer than the total length (L10 > L11 + L12) of the axial length L11 (i.e., the thickness L11) of the front end plate portion 234 and the axial length L12 (i.e., the thickness L12) of the elastic body 205.

[0089] A plurality of threaded holes 207 are formed in the cylindrical portion 206B in the circumferential direction. A screw 208 serving as a locking portion is screwed into the threaded hole 207 from the outer diameter side.

[0090] The screw 208 screwed into the threaded hole 207 abuts against the back surface of the front end plate portion 234. Thereby, separation of the front end plate portion 234 and the pressing plate 206 is restricted.

[0091] In this way, it is possible to restrict excessive separation of the front end plate portion 234 of the movable body 203 and the pressing plate 206 by the screw 208, so that the elastic body 205 is not affected. For example, even if the front end plate portion 234 is deformed, the distance between the front end plate portion 234 and the pressing plate 206 can be maintained by the screw 208, so that the contact surface between the front end plate portion 234 and the elastic body 205 and the contact surface between the elastic body 205 and the pressing plate 206 are not peeled off. In addition, the relative inclination of the front end plate portion 234 and the bottom plate portion 206A of the pressing plate 206 is restricted, so that uneven surface pressure on the pressed surface W1 of the object W to be acted on can be suppressed during pressing.

[0092] Moreover, since the elastic body 205 is disposed in the closed space S, the elastic body 205 does not leak to the outside from the closed space S during pressing, and the pressing force can be efficiently transmitted to the pressed surface W1.

[0093] In addition, in the third embodiment, the screw 208 is illustrated as the locking portion, but it is not limited thereto and can be freely changed. For example, the front end plate portion and the pressing plate may be clamped in the axial direction by a clamping member or the like.

[0094] Embodiment 4

[0095] Next, a pressing device according to Embodiment 4 will be described. In addition, the description of the same structure as that in the foregoing Embodiment 1 will be omitted. Figure 6

[0096] The movable body 303 of the pressing device 300 according to the fourth embodiment is provided with a flange portion 336 protruding to the right from the outer edge of the front end plate portion 334. That is, on the right side of the movable body 303, a concave portion 337 that is open on the right side is formed by the front end plate portion 334 and the flange portion 336. The concave portion 337 has a rectangular shape when viewed in the axial direction.

[0097] The elastic body 305 is surrounded by the flange portion 336 and the front end plate portion 334 and is disposed in the concave portion 337 without a gap.

[0098] The pressing plate 306 is surrounded by the flange portion 336 and the elastic body 305 and is disposed in the concave portion 337 without a gap.

[0099] That is, the elastomer 305 is disposed in a substantially enclosed space S1 without clearance, and this enclosed space S1 is formed between the front end plate portion 334 and the edge portion 336 of the movable body 303 and the pressing plate 306.

[0100] Thus, since the elastomer 305 is disposed in the enclosed space S1, the elastomer 305 will not leak out of the enclosed space S1 to the outside during pressurization, and the pressing force can be efficiently transmitted to the surface W1 to be pressurized.

[0101] As described above, the embodiments of the present invention have been described with reference to the drawings, but the specific structure is not limited to these embodiments, and changes and additions within the scope not departing from the gist of the present invention are also included in the present invention.

[0102] For example, in the foregoing Embodiments 1 to 4, an example is given in which the front end plate portion, the pressing plate, and the elastomer are arranged in order of decreasing thickness, but their thicknesses can be freely changed.

[0103] Moreover, in the foregoing Embodiments 1 to 4, an example is given in which the front end plate portion, the pressing plate, and the elastomer are rectangular in shape when viewed along the axial direction, but it is not limited thereto. For example, they may be circular in shape when viewed along the axial direction.

[0104] Moreover, in the foregoing Embodiments 1 to 4, an example is given in which the pressing device has a pressing plate, but the pressing plate may not be provided. For example, the elastomer may be in direct contact with the surface to be pressurized.

[0105] Moreover, in the foregoing Embodiments 1 to 4, an example is given in which the elastomer covers the entire front end surface of the movable body, but it is not limited thereto, and it may be locally provided on the front end surface of the movable body. In this case, preferably, a plurality of elastomers are dispersedly arranged on the front end surface of the movable body.

[0106] Moreover, in the foregoing Embodiments 1 to 4, an example is given in which the elastomer is a sheet-like rubber material, but it is not limited thereto, as long as it can disperse the stress acting on the front end surface of the movable body. For example, it may also be a synthetic resin or the like, or it may be a spring or the like disposed between the front end surface of the movable body and the pressing plate.

[0107] Moreover, in the foregoing Embodiments 1 to 4, an example is given in which the movable body is driven to advance and retreat relative to the base body by the pressure of the pressure accumulation portion, but it is not limited thereto. It may also be that the movable body is driven to advance and retreat by the pressure of a fluid supplied from an external pump or accumulator or the like.

[0108] Moreover, in the foregoing Embodiments 1 to 4, an example is given in which gas is accumulated in the pressure accumulation portion, but a liquid such as oil or a mixture of a liquid and a gas may also be sealed in the pressure accumulation portion.

[0109] Further, in the foregoing Embodiments 1 to 4, the mode in which the breathing holes 41 are provided in the cylindrical body 4 is illustrated. However, the breathing holes 41 may not be provided, and in addition to the pressure change in the pressure accumulating portion 10, the pressure change in the space portion 11 is also utilized.

[0110] Reference Numeral Explanation

[0111] 1: Pressurizing device; 2: Substrate; 3: Movable body; 5: Elastic body; 6: Pressing plate; 10: Pressure accumulating portion; 11: Space portion; 34: Front end plate portion; 34b: Front end face; 100: Pressurizing device; 103: Movable body; 105: Elastic body; 106: Pressing plate; 134: Front end plate portion; 200: Pressurizing device; 203: Movable body; 205: Elastic body; 206: Pressing plate; 208: Screw (locking portion); 300: Pressurizing device; 303: Movable body; 305: Elastic body; 306: Pressing plate; F: Oil; G: Gas; S: Closed space; W: Object to be acted on; W1: Surface to be pressurized.

Claims

1. A pressurizing device, comprising: a base body; and a movable body that moves forward and backward relative to the base body to pressurize an object to be acted upon, wherein the pressurizing device has an elastic body disposed between the front end face of the movable body and the surface to be pressurized of the object to be acted upon.

2. The pressurizing device according to claim 1, wherein the pressurizing device has a pressing plate disposed between the elastic body and the surface to be pressurized.

3. The pressurizing device according to claim 2, wherein the pressurizing device has a locking portion that locks the front end face of the movable body and the pressing plate.

4. The pressurizing device according to claim 2 or 3, wherein a closed space is formed between the front end face of the movable body and the pressing plate, and the elastic body is disposed within the closed space.

5. The pressurizing device according to claim 1, wherein the movable body is driven to move forward and backward by the pressure of gas within a pressure space provided between the movable body and the base body.

6. The pressurizing device according to claim 1, wherein the thickness of the central portion of the front end plate portion of the movable body is thicker than the thickness of the outer edge portion.

Images