Positioning fixture

Abstract

The cylinder main body (110) includes a small-diameter portion (112) to be embedded in the base body (1) and a large-diameter portion (111) to protrude in the first direction from the second face (20) side of the base body (1) opposite the first face (10) and have a larger outer diameter than the small-diameter portion (112). The engaging member (130) is provided to the small-diameter portion (112) of the cylinder main body (110), and cylinder chambers (110A, 110B) in which the piston member (120) reciprocates are formed in the large-diameter portion (111) of the cylinder main body (110). Working medium passages (140A, 140B) through which working medium can be supplied from the inner peripheral side of the piston member (120) to the cylinder chambers (110A, 110B) are formed in the rod member (140). By driving the connecting member (200) in the first direction with the aid of the engaging member (130), the fixed object (2) is brought into abutment with the first face (10) of the base body (1) to perform positioning in the first direction.

Description

Technical Field

[0001] This technology relates to positioning and fixing devices. Background Technology

[0002] Positioning and fixing devices that can fix an object relative to a substrate after positioning it are known in the past. As background technology in contrast to the present technology, the technology described in Patent Documents 1 to 6 can be cited.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: International Application Publication No. 2005 / 075145

[0006] Patent Document 2: International Application Publication No. 2014 / 009201

[0007] Patent Document 3: Japanese Patent Application Publication No. 09-285925

[0008] Patent Document 4: Japanese Patent Application Publication No. 2019-14028

[0009] Patent Document 5: Japanese Patent Application Publication No. 2020-69556

[0010] Patent Document 6: German Utility Model No. 202018104109 Utility Model Content

[0011] Problems to be solved by utility models

[0012] The requirement is to further miniaturize the device while maintaining its positioning and fixing function. From a miniaturization perspective, there is room for further improvement in previous positioning and fixing devices.

[0013] The purpose of this technology is to provide a miniaturized positioning and fixing device.

[0014] Solution for solving the problem

[0015] This technology can provide the following positioning and fixing device in one technical solution.

[0016] [1] A positioning and fixing device capable of pulling and fixing an object toward a first surface of a substrate and positioning the object relative to the substrate, wherein the positioning and fixing device comprises: a fluid cylinder fixed to the substrate; and a connecting member having an outer peripheral surface, the connecting member being capable of being mounted on the object, the fluid cylinder comprising: a cylinder body; an annular piston member capable of reciprocating relative to the cylinder body in a first direction; a locking member engaging with the outer peripheral surface of the connecting member and driving the connecting member in the first direction as the piston member reciprocates; and a rod member fixed to the cylinder body. The cylinder body is fitted into the inner circumferential side of the piston member. The cylinder body includes: a small-diameter portion embedded in the base; and a large-diameter portion protruding from the second surface of the base opposite to the first surface along the first direction, having an outer diameter larger than that of the small-diameter portion. A locking member is provided in the small-diameter portion of the cylinder body. A cylinder chamber for reciprocating motion of the piston member is formed in the large-diameter portion of the cylinder body. A working medium passage for supplying working medium from the inner circumferential side of the piston member to the cylinder chamber is formed in the rod member. By driving the connecting member along the first direction with the locking member, the fixed object abuts against the first surface of the base and is positioned in the first direction.

[0017] [2] According to the positioning and fixing device described in [1], the cylinder body further includes a hole having an inner circumferential surface that abuts against the outer circumferential surface of the connecting member, so that the outer circumferential surface of the connecting member abuts against the inner circumferential surface of the hole for positioning in a second direction orthogonal to the first direction.

[0018] [3] The positioning and fixing device according to [1] or [2], wherein the base has an embedding hole and the small-diameter portion of the cylinder body is pressed into the embedding hole from the second side.

[0019] [4] The positioning and fixing device according to any one of [1] to [3], wherein a stepped surface is formed between the small diameter portion and the large diameter portion of the cylinder body, and the stepped surface abuts against the second surface of the base.

[0020] [5] The positioning and fixing device according to any one of [1] to [4], wherein the base abuts against the object to be fixed in the region adjacent to the small diameter portion on the first surface.

[0021] [6] The positioning and fixing device according to any one of [1] to [5], wherein the piston member divides the large diameter portion of the cylinder body into a first chamber away from the base and a second chamber close to the base, and a through hole is formed in the piston member, the through hole extending from the inner circumferential side of the piston member to the outer circumferential side of the piston member, so that the working medium passage is connected to the second chamber.

[0022] [7] According to the positioning and fixing device described in [6], the piston component includes a first part that fits into the large diameter portion of the cylinder body and a second part that fits into the small diameter portion of the cylinder body, and a through hole is formed between the first part and the second part.

[0023] [8] The positioning and fixing device according to any one of [1] to [7], wherein the rod member includes a retaining part that retains a locking member provided on the small diameter portion of the cylinder body.

[0024] [9] The positioning and fixing device according to any one of [1] to [8], wherein the engaging member includes a plurality of steel balls arranged in a circumferential manner on the cylinder body, and the connecting member includes engaging recesses formed so that the plurality of steel balls can contact each other respectively.

[0025]

[10] According to the positioning and fixing device described in [9], by driving the piston member toward the object to be fixed, multiple steel balls are respectively engaged with the engagement recess, thereby positioning and fixing the object to the base. By driving the piston member away from the object to be fixed, multiple steel balls are respectively disengaged from the engagement recess, thereby releasing the object from the base.

[0026]

[11] The positioning and fixing device according to any one of [1] to

[10] , wherein the rod member has a recess that receives the front end side of the connecting structure member.

[0027]

[12] The positioning and fixing device according to any one of [1] to

[11] , wherein the positioning and fixing device further comprises a force-applying member housed in a cylinder chamber, which applies force to the piston member in the direction in which the object to be fixed is fixed.

[0028] Effects of the utility model

[0029] Based on this technology, a miniaturized positioning and fixing device can be obtained. Attached Figure Description

[0030] Figure 1 This is a cross-sectional view showing the clamping state of a positioning and fixing device according to one embodiment.

[0031] Figure 2 yes Figure 1 Sectional view II-II in the middle.

[0032] Figure 3 yes Figure 1 An enlarged view of the area around the locking element in the positioning and fixing device shown.

[0033] Figure 4 This is a cross-sectional view showing the loosened state of the positioning and fixing device (fixed object and connecting structural member) of one embodiment.

[0034] Figure 5 This is a cross-sectional view showing the loosened state (base and fluid cylinder) of the positioning and fixing device in one embodiment.

[0035] Figure 6 This is a cross-sectional view showing the clamping state of the positioning and fixing device in other embodiments. Detailed Implementation

[0036] The embodiments of this technology will be described below. Furthermore, sometimes the same or equivalent parts are labeled with the same reference numerals, and their description will not be repeated.

[0037] Furthermore, in the embodiments described below, when numbers, quantities, etc., are mentioned, the scope of this technology is not necessarily limited to those numbers, quantities, etc., unless specifically stated otherwise. Additionally, in the embodiments described below, each constituent element is not necessarily essential to this technology, unless specifically stated otherwise. Furthermore, this technology is not necessarily limited to performing all the effects mentioned in these embodiments.

[0038] Furthermore, in this specification, the terms "comprise," "include," and "have" are open-ended. That is, when a structure is included, other structures besides that structure may be included, or those other structures may not be included.

[0039] Furthermore, in this specification, when using geometric terms and terms indicating positional or directional relationships, such as "parallel," "orthogonal," "45° oblique," "coaxial," and "along," slight errors or variations are permissible. In this specification, when using terms indicating relative positional relationships such as "upper side" and "lower side," these terms are used to indicate relative positional relationships in a given state, and depending on the orientation of each mechanism (e.g., flipping the entire mechanism upside down), the relative positional relationship can be flipped or rotated by any angle.

[0040] Figure 1 This is a cross-sectional view showing the clamping state of the positioning and fixing device according to one embodiment. Figure 2 yes Figure 1 Sectional view II-II in [the document / reference]. Furthermore, in [the document / reference]... Figure 2 For ease of illustration, connecting member 200 and bolt 200A are not shown. Hereinafter, they will sometimes be referred to as... Figure 1 The vertical direction in the middle is called the "vertical direction" or "first direction". Figure 1 The left and right directions or the directions perpendicular to the paper are called the "horizontal direction" or "second direction".

[0041] like Figure 1 , Figure 2 As shown, the positioning and fixing device of this embodiment includes a fluid cylinder 100 fixed to the base 1 and a connecting member 200 installed on the fixed object 2 by bolts 200A.

[0042] The positioning and fixing device pulls the object 2 closer to and fixes it to the first surface 10, which serves as the reference surface (reference plane) of the base 1. By abutting the object 2 against the first surface 10 of the base 1, the object 2 can be positioned relative to the base 1 in the vertical direction.

[0043] Examples of fixed objects 2 include workpiece trays for mounting workpieces for cutting, or molds, but fixed objects 2 in this art are not limited to these.

[0044] like Figure 1 As shown, the fluid cylinder 100 includes a cylinder body 110, a piston component 120, a locking component 130, a rod component 140, a force-applying component 150, and a stop component 160.

[0045] The cylinder body 110 includes a large diameter portion 111, a small diameter portion 112, a bore portion 113, and a stepped surface 114.

[0046] The large-diameter portion 111 protrudes from the second surface 20 (back side) of the base 1 along the vertical direction (first direction). The large-diameter portion 111 has an outer diameter larger than that of the small-diameter portion 112.

[0047] The small-diameter portion 112 is embedded in the base 1. More specifically, the small-diameter portion 112 is pressed into the insertion hole 30 of the base 1 from the second surface 20 side. In the region adjacent to the small-diameter portion 112 of the cylinder body 110, the first surface 10 of the base 1 abuts against the fixed object 2.

[0048] A hole 113 is formed on the upper surface of the small-diameter portion 112, facing the object to be fixed 2. The inner peripheral surface of the hole 113 abuts against the outer peripheral surface 210 of the connecting member 200. By abutting the outer peripheral surface 210 of the connecting member 200 with the hole 113 of the cylinder body 110, the object to be fixed 2 can be positioned relative to the base 1 in the horizontal direction (second direction). Positioning in the horizontal direction can be... Figure 1 Positioning can be performed in both the left-right direction and the direction perpendicular to the paper, or it can be positioned in only one of these two directions. In addition, in this technology, positioning in the horizontal direction (second direction) is not necessary, and the positioning and fixing device can also perform positioning only in the vertical direction (first direction).

[0049] A stepped surface 114 is formed between the large-diameter portion 111 and the small-diameter portion 112. The stepped surface 114 abuts against the second surface 20 of the base 1. When an external force is applied to the fixed object 2 fixed to the base 1, the external force is transmitted to the cylinder body 110 via the connecting member 200 and the engaging member 130. The external force transmitted to the cylinder body 110 can be transmitted to the base 1 via the stepped surface 114. In this way, since the force acting on the fixed object 2 can be transmitted to the base 1 via the stepped surface 114, especially when an external force is applied in the direction that pulls the fixed object 2 away from the base 1, the base 1 can bear the external force, thereby suppressing accidental positional displacement of the fixed object 2.

[0050] Cylinder chambers 110A (first chamber) and 110B (second chamber) are formed inside the cylinder body 110. Cylinder chambers 110A and 110B are divided by piston member 120. Cylinder chambers 110A and 110B are formed in the large-diameter portion 111 of the cylinder body 110.

[0051] When fixing (clamping) the fixed object 2, working pressure is supplied to cylinder chamber 110A. When releasing (releasing) the fixing of the fixed object 2, working pressure is supplied to cylinder chamber 110B.

[0052] The piston member 120 is fitted into the large-diameter portion 111 of the cylinder body 110. The piston member 120 is an annular member with a rod member 140 fitted on its inner circumference. The piston member 120 is reciprocated in the vertical direction by the pressure of the working medium (typically working air, but not limited to, and could also be working oil) supplied or discharged relative to the cylinder chambers 110A, 110B.

[0053] The piston assembly 120 includes a first portion 121 that fits into a large-diameter portion 111 of the cylinder body 110, and a second portion 122 that fits into a small-diameter portion 112 of the cylinder body 110. A through hole 123 is formed between the first portion 121 and the second portion 122, extending from an internal space 110C formed on the inner circumferential side of the piston assembly 120 to a cylinder chamber 110B formed on the outer circumferential side of the piston assembly 120.

[0054] The engaging member 130 engages with the outer peripheral surface of the connecting member 200, and moves horizontally while driving the connecting member 200 in the vertical direction (opposite to the piston member 120) as the piston member 120 reciprocates in the vertical direction. The engaging member 130 is provided in the small diameter portion 112 of the cylinder body 110.

[0055] like Figure 2As shown, the engaging member 130 includes a plurality of steel balls arranged in a circumferential manner on the cylinder body 110. The connecting member 200 includes engaging recesses 220 formed to allow the plurality of steel balls to contact each other. The engaging recesses 220 are formed such that the outer peripheral surface 210 of the connecting member 200 is recessed radially inward over the entire circumferential range of the connecting member 200.

[0056] Refer again Figure 1 The rod member 140 is fixed to the cylinder body 110. The rod member 140 is fitted into the inner circumferential side of the piston member 120. Air passages 140A and 140B (working medium passages) are formed in the rod member 140, enabling the supply of air (working medium) from the inner circumferential side of the piston member 120 to the cylinder chambers 110A and 110B. The air passage 140A communicates with the cylinder chamber 110A. A through hole 123 formed in the piston member 120 connects the internal space 110C, which communicates with the air passage 140B, to the cylinder chamber 110B. Thus, the air passage 140B communicates with the cylinder chamber 110B.

[0057] Working air is supplied from the vertically downward air passages 140A and 140B. Air passages 140A and 140B have portions extending vertically from the inlet and portions extending radially or obliquely to the outer periphery of the rod member 140. The inlets of air passages 140A and 140B are formed on the lower surface of the rod member 140, with their centers located in the area overlapping with or further inward from the engagement member 130 when viewed from the vertical direction (first direction). The working air supplied to air passages 140A and 140B is supplied to cylinder chambers 110A and 110B, which, when viewed from the vertical direction (first direction), reach the area further inward from the outer periphery of the engagement member 130.

[0058] A retaining part 141 and a recess 142 are provided on the front end side of the rod member 140. The retaining part 141 retains the engaging member 130 provided on the small diameter part 112 of the cylinder body 110, and the recess 142 accommodates the front end side of the connecting structure member 200.

[0059] The force-applying member 150 is housed in the cylinder chamber 110A on the locking side (clamping side). The force-applying member 150 applies force to the piston member 120 in the vertical direction. That is, the force-applying member 150 applies force to the piston member 120 in the direction in which the fixed object 2 is fixed. Thus, even if the air pressure supply is interrupted, the fixed object 2 can be maintained in a fixed position.

[0060] The stop 160 is provided to fix the rod member 140 to the cylinder body 110. The stop 160 is used to limit the displacement of the rod member 140 relative to the cylinder body 110.

[0061] Sealing members 171, 172, 173, 174, and 175 are disposed inside the cylinder body 110. Sealing member 171 is disposed in the sliding portion between the large-diameter portion 111 of the cylinder body 110 and the first portion 121 of the piston member 120. Sealing member 172 is disposed in the sliding portion between the small-diameter portion 112 of the cylinder body 110 and the second portion 122 of the piston member 120. Sealing member 173 is disposed in the fitting portion between the rod member 140 and the large-diameter portion 111 of the cylinder body 110. Sealing members 174 and 175 are respectively disposed in the sliding portions between the inner circumferential surface of the piston member 120 and the rod member 140. Sealing member 171 seals the space between cylinder chambers 110A and 110B. Sealing member 172 seals the space between cylinder chamber 110B and the exterior of the cylinder body 110. Sealing member 173 seals the space between cylinder chamber 110A and the exterior of the cylinder body 110. Sealing member 174 seals the cylinder chamber 110A with the internal space 110C. Sealing member 175 seals the internal space 110C with the outside of the cylinder body 110. Sealing members 171, 172, 173, 174, and 175 are, for example, formed of O-rings.

[0062] As described above, when the object 2 is positioned and fixed to the base 1, air pressure is supplied to the cylinder chamber 110A, driving the piston member 120 towards the object 2, causing the engaging member 130 to engage with the engaging recess 220 of the connecting member 200. This drives the connecting member 200 downward in the vertical direction by means of the engaging member 130. As a result, the object 2 is positioned vertically by contacting the first surface 10 of the base 1, and horizontally by contacting the outer peripheral surface 210 of the connecting member 200 with the inner peripheral surface of the hole 113 of the cylinder body 110.

[0063] Figure 3 This is an enlarged view of the area surrounding the 130-type card assembly. (See image below.) Figure 3 As shown, a conical surface 122A is formed in the second part 122 of the piston member 120, which is inclined radially outward as it approaches the fixed object 2, and a front end surface 141A is formed in the holding part 141 of the rod member 140, which is inclined in the opposite direction to the conical surface 122A of the piston member 120.

[0064] When air pressure is supplied to cylinder chamber 110A, piston member 120 is driven upward (towards the small diameter portion 112 of cylinder body 110). As piston member 120 is driven upward, engaging member 130, held by retaining portion 141 of rod member 140, is pressed radially inward by tapered surface 122A against connecting member 200. Engaging member 130, pressed radially inward, engages with engaging recess 220 of connecting member 200, driving connecting member 200 downward in the vertical direction.

[0065] As a result, the object to be fixed 2 is pressed downward. That is, by driving the piston member 120 toward the object to be fixed 2, the engaging member 130 of the fluid cylinder 100 engages with the engaging recess 220 of the connecting member 200, thereby fixing the object to be fixed 2 to the base 1.

[0066] The fixed object 2 is pressed down until it comes into contact with the first surface 10 of the base 1. The first surface 10 is used to position the fixed object 2 in the vertical direction (first direction).

[0067] When the connecting member 200 is driven downward, its outer peripheral surface 210 engages with the hole 113 of the cylinder body 110. Therefore, the connecting member 200 descends while being guided by the hole 113 of the cylinder body 110. This achieves horizontal (second direction) positioning of the fixed object 2.

[0068] Figure 4 , Figure 5 This is a cross-sectional view showing the loosened state of the aforementioned positioning and fixing device. Figure 4 This indicates the fixed object 2 and the connecting structural component 200. Figure 5 (This refers to the base 1 and the fluid cylinder 100).

[0069] When releasing the positioning of the fixed object 2, air pressure is supplied to the cylinder chamber 110B, driving the piston component 120 away from the fixed object 2, thereby releasing the engagement between the engaging member 130 and the engaging recess 220 of the connecting member 200. Thus, as... Figure 4 , Figure 5 As shown, the fixed object 2 is released from the base 1, and the two can be separated.

[0070] Figure 6 This is a sectional view showing the clamping state of the positioning and fixing device in a modified example. Figure 6 In the example, the installation direction of the bolt 200A used to fix the connecting member 200 to the fixed object 2 is the same as... Figures 1 to 5 The examples are different.

[0071] Although Figure 6 Although not shown in the diagram, in this modified example, the aforementioned air passages 140A and 140B (working medium passages) are also formed in the rod member 140. Additionally, as... Figure 6 As shown, an air passage 140C is formed from the lower end of the rod member 140 to the recess 142.

[0072] By using air supplied (blowing) from the air passage 140C to the recess 142, the inside of the cylinder body 110 can be cleaned. In addition, by detecting the air pressure in the air passage 140C, the tightness of the fixed object 2 against the substrate 1 can also be detected.

[0073] In the positioning and fixing device of this embodiment, by providing air passages 140A and 140B in the rod member 140 fitted to the inner peripheral side of the piston member 120, working air is supplied from the inner peripheral side of the cylinder chambers 110A and 110B, thereby enabling the supply and discharge of working air from the piping connected to the lower part of the fluid pressure cylinder 100. Therefore, compared with the case where air passages are formed in the base 1, the overall mechanism can be miniaturized.

[0074] Here, by setting the engaging member 130 of the drive linkage member 200 on the small diameter portion 112 of the cylinder body 110, pressing the small diameter portion 112 into the embedding hole 30 of the base 1, and causing the large diameter portion 111 to protrude from the second surface 20 side of the base 1, the overall mechanism can be miniaturized in both the vertical and horizontal directions.

[0075] In addition, by positioning and fixing the base 1 directly against the fixed object 2, the overall size of the mechanism can be reduced in the vertical direction.

[0076] In addition, by forming cylinder chambers 110A and 110B in the large-diameter portion 111 of the cylinder body to allow the piston component 120 to reciprocate, it is possible to achieve overall miniaturization of the mechanism while ensuring the cylinder area.

[0077] Furthermore, by making the stepped surface 114 between the large-diameter portion 111 and the small-diameter portion 112 abut against the second surface 20 of the base 1, the cylinder body 110 can withstand the external force acting on the fixed object 2, thus enabling the overall miniaturization of the mechanism while maintaining the clamping force.

[0078] The embodiments of this technology have been described above, but it should be considered that the embodiments disclosed herein are illustrative in all respects and not restrictive. The scope of this technology is defined by the claims and is intended to include all modifications within the meaning and scope equivalent to the claims.

[0079] Explanation of reference numerals in the attached figures

[0080] 1. Matrix; 2. Fixed object; 10. First surface; 20. Second surface; 30. Embedded hole; 100. Fluid cylinder; 110. Cylinder body; 110A, 110B. Cylinder chamber; 110C. Internal space; 111. Large diameter section; 112. Small diameter section; 113. Hole section; 114. Stepped surface; 120. Piston component; 121. Part 1; 122. Part 2; 122A. Conical surface; 12 3. Through hole; 130. Engaging part; 140. Rod member; 140A, 140B, 140C. Air passage; 141. Holding part; 141A. Front end face; 142. Recess; 150. Force-applying member; 160. Stopping member; 171, 172, 173, 174, 175. Sealing member; 200. Connecting structural member; 200A. Bolt; 210. Outer peripheral surface; 220. Engaging recess.

Claims

1. A positioning and fixing device capable of pulling and fixing an object toward a first surface of a substrate, and positioning the object relative to the substrate, characterized in that, The positioning and fixing device has the following features: A fluid cylinder, fixed to the base; and A connecting structural member having an outer peripheral surface, the connecting structural member being capable of being installed on the fixed object. The fluid cylinder includes: a cylinder body; an annular piston member capable of reciprocating relative to the cylinder body along a first direction; a locking member engaging with the outer peripheral surface of the connecting member, driving the connecting member along the first direction as the piston member reciprocates; and a rod member fixed to the cylinder body and fitted into the inner peripheral side of the piston member. The cylinder body includes: a small-diameter portion embedded in the base; and a large-diameter portion protruding from a second surface of the base opposite to the first surface along the first direction, having an outer diameter larger than that of the small-diameter portion. The engaging component is disposed on the small-diameter portion of the cylinder body. A cylinder chamber is formed in the large-diameter portion of the cylinder body to allow the piston component to reciprocate. The rod member has a working medium passage that allows the working medium to be supplied from the inner circumferential side of the piston member to the cylinder chamber. Positioning in the first direction is achieved by driving the connecting member along the first direction using the engaging member, thereby causing the fixed object to abut against the first surface of the base.

2. The positioning and fixing device according to claim 1, characterized in that, The cylinder body also includes a bore having an inner circumferential surface that abuts against the outer circumferential surface of the connecting member. Positioning is achieved by bringing the outer peripheral surface of the connecting member into contact with the inner peripheral surface of the hole, thereby positioning it in a second direction orthogonal to the first direction.

3. The positioning and fixing device according to claim 1 or 2, characterized in that, The substrate has embedded holes. The small-diameter portion of the cylinder body is pressed into the embedding hole from the second side.

4. The positioning and fixing device according to claim 1 or 2, characterized in that, A stepped surface is formed between the small-diameter portion and the large-diameter portion of the cylinder body, and the stepped surface abuts against the second surface of the base.

5. The positioning and fixing device according to claim 1 or 2, characterized in that, The substrate abuts against the fixed object in the region adjacent to the small diameter portion on the first surface.

6. The positioning and fixing device according to claim 1 or 2, characterized in that, The piston assembly divides the large-diameter portion of the cylinder body into a first chamber away from the base and a second chamber closer to the base. A through hole is formed in the piston member, which extends from the inner circumference of the piston member to the outer circumference of the piston member, so that the working medium passage is connected to the second chamber.

7. The positioning and fixing device according to claim 6, characterized in that, The piston component includes a first portion that engages with the large-diameter portion of the cylinder body and a second portion that engages with the small-diameter portion of the cylinder body, with the through hole formed between the first portion and the second portion.

8. The positioning and fixing device according to claim 1 or 2, characterized in that, The rod member includes a retaining portion that retains the engaging member disposed on the small-diameter portion of the cylinder body.

9. The positioning and fixing device according to claim 1 or 2, characterized in that, The engaging component includes a plurality of steel balls arranged in a circumferential manner on the cylinder body. The connecting member includes engaging recesses formed to allow the plurality of steel balls to contact each other.

10. The positioning and fixing device according to claim 9, characterized in that, By driving the piston component towards the object to be fixed, the plurality of steel balls engage with the engaging recesses, thereby positioning and fixing the object to the base. By driving the piston component away from the fixed object, the plurality of steel balls are disengaged from the engaging recess, thereby releasing the fixed object from the base.

11. The positioning and fixing device according to claim 1 or 2, characterized in that, The rod member has a recess that accommodates the front end side of the connecting member.

12. The positioning and fixing device according to claim 1 or 2, characterized in that, The positioning and fixing device also includes a force-applying component housed in the cylinder chamber, which applies force to the piston component in the direction in which the fixed object is fixed.

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