Detachable device

Abstract

To provide an attachment / detachment device which can be operated in a reliable manner with easy operation.SOLUTION: An attachment / detachment device detachably attaches a second connection member (4) to a first connection member (3). An operation chamber (8) formed in a base material (5) of the second connection member (4) communicates with the exterior of the base material (5) through an insertion hole (7) which is open on a seating surface (6) of the first connection member (3). Two clamp arms (10), (11) are provided in the operation chamber (8) so as to be bilaterally symmetric with an axis of the operation chamber (8) set to the center. Engagement parts (16, 17) are formed at one longitudinal end parts (10b, 11b) of the clamp arms (10, 11). An engagement member (32) protruding from the second connection member (4) may be inserted into the insertion hole (7). The engagement member (32) is formed with a locking part (34) with which the engagement parts (16, 17) may engage.SELECTED DRAWING: Figure 1

Description

Technical Field

[0004] ,

[0001] This invention relates to an attachment / detachment device for attaching or detaching a workpiece, a mold, a pallet, a robot hand, a tool, etc. to a base, a robot, and a slider.

Background Art

[0002] Conventionally, there is a device described in Patent Document 1 (Japanese Patent Application Laid-Open No. 2001-87971) of this type of attachment / detachment device. The prior art is configured as follows. The above attachment / detachment device is a device for attaching and detaching a holder for holding a jig or tool to an attachment fixed to the extraction arm of a molded product extraction device. A locking claw portion projects downward from the lower wall of the holder. An insertion hole into which the locking claw portion can be inserted is formed in the attachment body. A slide claw that can be slid in and out of the insertion hole is inserted into the attachment body. A knob projects outward from the attachment body through a lever to the right of the slide claw. A spring is mounted between the outer peripheral wall of the lever and the right wall of the attachment body outside the slide claw, and the spring biases the slide claw to be inserted into the insertion hole with respect to the attachment body. When attaching the holder to the attachment, an operator operates to pull the knob so that the locking claw portion of the holder is inserted into the insertion hole. Then, when the operator releases the knob, the spring engages the slide claw with the locking claw portion. Thereby, the holder is attached to the attachment.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The above prior art has the following problems. In conventional technology, when attaching or detaching a holder from the attachment of a retrieval arm, the operator must simultaneously hold the retrieval arm in place with one hand to prevent it from moving, hold the jig or fixture to prevent it from falling, and pull the knob of the attachment / detachment device with the other hand. Therefore, multiple operations must be performed simultaneously with utmost care to prevent the force of pulling the knob from acting on the retrieval arm and causing it to shift position. The object of the present invention is to provide a detachable device that operates reliably with simple operation. [Means for solving the problem]

[0005] To achieve the above objective, the first invention configures the attachment / detachment device as follows, for example, as shown in Figures 1 to 4 and Figures 5 to 8. The above-described attachment / detachment device detachably attaches a second connecting member 4 to a first connecting member 3 and is configured as follows: A seating surface 6 into which the second connecting member 4 can abut is formed on the base member 5 of the first connecting member 3. An operating chamber 8 formed within the base member 5 is connected to the outside of the base member 5 via an insertion hole 7 opening in the seating surface 6. Two clamp arms 10 and 11 are provided within the operating chamber 8 so as to be symmetrical with respect to the axis of the operating chamber 8. Furthermore, the longitudinal intermediate portions 10a and 11a of the clamp arms 10 and 11 are rotatably supported by rotating shafts 12, 13, or rotating shaft 51 protruding from the inner wall of the operating chamber 8. Engaging portions 16 and 17 are formed on one longitudinal end 10b and 11b of the clamp arms 10 and 11. Operating portions 18 and 19 are provided on the other longitudinal end 10c and 11c of the clamp arms 10 and 11. The biasing means 24 rotates the clamp arms 10 and 11 so as to separate the operating parts 18 and 19. An engaging member 32 or two engaging members 32A and 32B protruding from the second connecting member 4 are insertable into the insertion hole 7. Locking parts 34, 34A and 34B are formed on the engaging members 32, 32A and 32B so as to be engageable with the engaging parts 16 and 17. Positioning pins 35, 36, 35A and 36A are protruding from the other of the first connecting member 3 and the second connecting member 4 so as to be parallel to the engaging members 32, 32A and 32B, and are insertable into reference holes 39, 40, 39A and 40A formed in one of the first connecting member 3 and the second connecting member 4.

[0006] The above-described first invention provides the following effects. When attaching the second connecting member to the first connecting member, inserting the engaging member of the second connecting member into the insertion hole causes the engaging member to rotate the clamp arm against the biasing force of the biasing means, and then the engaging portion of the clamp arm engages with the locking portion of the engaging member. This allows the second connecting member to be easily connected to the first connecting member. Furthermore, when removing the second connecting member from the first connecting member, the operator grasps and manipulates the two clamp arms to bring them closer together, thereby separating the engaging portion of the clamp arm from the locking portion of the engaging member. During this operation, the operator applies opposing pressing forces to the clamp arms. As a result, these opposing pressing forces cancel each other out, and the pressing forces have almost no effect on the first or second connecting member. Therefore, the pressing force from the grasping operation prevents it from pushing other components such as sliders through the first connecting member and shifting their stopping position.

[0007] To achieve the above objective, the second invention configures the attachment / detachment device as follows, for example, as shown in Figures 5 to 8. The above-described attachment / detachment device detachably attaches a second connecting member 4 to a first connecting member 3 and is configured as follows: A seating surface 6 into which the second connecting member 4 can abut is formed on the base member 5 of the first connecting member 3. An operating chamber 8 formed within the base member 5 is connected to the outside of the base member 5 via an insertion hole 7 opening in the seating surface 6. Two clamp arms 10 and 11 are provided within the operating chamber 8 so as to be symmetrical with respect to the axis of the operating chamber 8. Furthermore, the longitudinal intermediate portions 10a and 11a of the clamp arms 10 and 11 are rotatably supported by a pivot shaft 51 protruding from the inner wall of the operating chamber 8. Engaging portions 16 and 17 are formed on one longitudinal end 10b and 11b of the clamp arms 10 and 11. Operating portions 18 and 19 are provided on the other longitudinal ends 10c and 11c of the clamp arms 10 and 11. The biasing means 24 rotates the clamp arms 10 and 11 so as to separate the operating parts 18 and 19. Engaging members 32A and 32B, which protrude from the ceiling surface 31 of the second connecting member 4, are insertable into the insertion hole 7. Locking parts 34A and 34B, into which the engaging parts 16 and 17 can engage, are formed on the engaging members 32A and 32B. A support surface 41 intersecting the seating surface 6 is formed on the base member 5. A supported surface 42 intersecting the ceiling surface 31 is formed on the second connecting member 4. Furthermore, the supported surface 42 is in contact with the support surface 41. A support member 52, which protrudes from the other of the support surface 41 and the supported surface 42, is inserted into a guide groove 53 that opens on one of the support surface 41 and the supported surface 42.

[0008] The first and second inventions are preferably modified to include the following configurations (1) and (2). (1) For example, as shown in Figures 1 to 4, projections 14 and 15 are provided projecting toward the axis of the working chamber 8 so that they face each other at one end 10b and 11b of the clamp arms 10 and 11. The engaging portions 16 and 17 are formed by parts of the projections 14 and 15. A recess 33 is formed in the outer wall of the engaging member 32. A locking portion 34 is formed by a part of the recess 33.

[0009] (2) For example, as shown in Figures 5 to 8, the projection 14 protruding from the one end 10b of one clamp arm 10 and the projection 15 protruding from the one end 11b of the other clamp arm 11 are formed toward the inner wall of the working chamber 8 so that they do not face each other. The engaging portions 16 and 17 are formed by parts of the projections 14 and 15. The first connecting member 3 is provided with two engaging members 32A and 32B. The recess 33A formed in one engaging member 32A and the recess 33B formed in the other engaging member 32B face each other. The locking portions 34A and 34B are formed by parts of the recesses 33A and 33B.

[0010] The second invention preferably includes the following configuration. The support member 52 has a small-diameter portion 52a and a large-diameter portion 52b that are formed sequentially from the base end to the tip end. The small-diameter portion 52a of the support member 52 is inserted into the guide groove 53. In this case, when the second connecting member is connected to the first connecting member, and an external force acts on the second connecting member in a direction that separates the supported surface of the second connecting member from the supporting surface of the first connecting member, the large-diameter portion of the first connecting member receives the peripheral wall of the guide groove of the second connecting member. This prevents the external force from acting on the connection portion between the first and second connecting members, and as a result, wear and damage to that connection portion can be prevented. [Brief explanation of the drawing]

[0011] [Figure 1] Figure 1 shows a schematic diagram of a first embodiment of the present invention, specifically a cross-sectional view of the detachable device. [Figure 2] Figure 2 is an explanatory diagram of the operation of the attachment / detachment device, showing the attached state of the attachment / detachment device. [Figure 3] Figure 3 is a view taken along the line AA in Figure 2. [Figure 4] Figure 4 is a view taken along the line BB in Figure 2. [Figure 5] Figure 5 shows a second embodiment of the present invention and is similar to Figure 1. [Figure 6]FIG. 6 is an operation explanatory view of the above-described attaching / detaching device, showing the attached state of the attaching / detaching device. [Figure 7] FIG. 7 is a view taken in the direction of the arrow along line F-F in FIG. 6. [Figure 8] FIG. 8 is a view taken in the direction of the arrow along line G-G in FIG. 6. [Figure 9] FIG. 9 is a diagram for further explaining the details of the attaching / detaching device of the present invention. [Figure 10] FIG. 10 is a diagram for explaining the relationship between the take-out device and the attaching / detaching device of the present invention.

Embodiments for Carrying out the Invention

[0012] Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2. In this embodiment, a case where an attaching / detaching device for detachably attaching a tool 2 to a movable part 1 of a slider of a take-out device is applied to a take-out device for taking out a molded product from an injection molding machine is illustrated.

[0013] The above-described take-out device includes a slider composed of a motor and a ball screw shaft. A tool 2 is attached to a movable part 1 of the slider via a first connecting member 3 and a second connecting member 4 of the attaching / detaching device. A base member 5 of the first connecting member 3 is fixed to the movable part 1. A seating surface 6 for receiving the second connecting member 4 is provided on an upper wall of the base member 5 of the first connecting member 3. An insertion hole 7 is opened in the seating surface 6, and an operating chamber 8 communicating with the insertion hole 7 is formed concentrically with the insertion hole 7 inside the base member 5.

[0014] Within the working chamber 8 described above, two clamp arms 10 (right side in the figure) and clamp arm 11 (left side in the figure) are provided symmetrically around the axis C of the working chamber 8 (see Figure 2) and extending in the vertical direction. The longitudinal intermediate portions 10a and 11a of each clamp arm 10 and 11 are rotatably supported by pivot shafts 12 and 13 that protrude from the inner wall of the working chamber 8. Projections 14 and 15 protrude inward toward the axis C of the working chamber 8 from the longitudinal tips (one end) 10b and 11b of each clamp arm 10 and 11. Engaging portions 16 and 17 are provided on the lower surfaces (base end faces) of these projections 14 and 15. The longitudinal base ends (other ends) 10c and 11c of each clamp arm 10 and 11 protrude downward toward the outside from the working chamber 8. Each base end 10c, 11c is provided with an operating part 18, 19 for the worker to grasp with their hand (or fingers).

[0015] In the middle of the longitudinal directions of the above two clamp arms 10 and 11, recesses 20 and 21 are provided so as to face each other between the rotary support shafts 12 and 13 and the base end portions 10c and 11c. A convex portion of a spring receiver 22 is inserted into one of the recesses 20, and a convex portion of another spring receiver 23 is inserted into the other recess 21. Each of the spring receivers 22 and 23 has the aforementioned convex portion, flange portion, and spring guide portion. A holding spring 24 constituted by a compression spring is mounted between the flange portion of one spring receiver 22 and the flange portion of the other spring receiver member 23. A spring guide portion of one spring receiver 22 is externally fitted to one end of the holding spring 24, and a spring guide portion of the other spring receiver member 23 is externally fitted to the other end of the holding spring 24. The holding spring 24 biases the base end portions 10c and 11c of the two clamp arms 10 and 11 to be separated from each other. In addition, stoppers 25 and 26 are provided on the inner wall of the operating chamber 8, and the clamp arms 10 and 11 biased by the holding spring 24 are received by the stoppers 25 and 26. At this time, the protruding portions 14 and 15 of the two clamp arms 10 and 11 are in the state of being closest to each other. Guide surfaces 27 and 28 are formed on the inner walls of the protruding portions 14 and 15 of the clamp arms 10 and 11. As shown in FIG. 2, the two guide surfaces 27 and 28 are inclined with respect to the axis C of the operating chamber 8 so as to widen (move away from the axis C of the operating chamber 8) toward the tip end.

[0016] As shown in FIG. 3, the second connecting member 4 is formed in an inverted L shape in a side view and has a top plate 29 and a side wall 30. An engaging member 32 projects downward from the ceiling surface 31 of the top plate 29. The engaging member 32 can be inserted into the insertion hole 7 of the first connecting member 3. A groove (recess) 33 is formed in the middle of the engaging member 32 in the height direction in the circumferential direction, and a locking portion 34 is formed on the peripheral wall of the groove 33. The engaging portions 16 and 17 of the clamp arms 10 and 11 of the first connecting member 3 can be engaged with the locking portion �4.

[0017] Two positioning pins 35 and 36 are provided projecting downward from the top plate 29, parallel to the engaging member 32, at a predetermined distance apart on either side of the engaging member 32. As shown in Figures 1 and 2, the right positioning pin 35 is formed as a roughly cylindrical shape, shorter in height than the engaging member 32, with its tip formed in a spherical shape. The left positioning pin 36 is formed to the same height and shape as the right positioning pin 35, but two parallel planar relief portions 37 and 38 are formed on the outer circumferential wall of the cylinder. As shown in Figure 4, these relief portions 37 and 38 are formed to be perpendicular to the direction connecting the axes of the two positioning pins 35 and 36 in a plan view. The positioning pins 35 and 36 can be inserted into the reference holes 39 and 40 of the base member 5. The sliding gap from the outer circumferential surface of the positioning pins 35 and 36 to the inner circumferential surface of the reference holes 39 and 40 is approximately 0.01 to 0.1 mm, preferably approximately 0.015 mm to 0.05 mm. When the right positioning pin 35 is inserted into the right reference hole 39, the second connecting member 4 is positioned horizontally relative to the base member 5. When the left positioning pin 36 is inserted into the left reference hole 40, the second connecting member 4 of the first connecting member 3 is able to move a distance slightly longer than the sliding gap in the direction of the axis of the two positioning pins 35 and 36 in a plan view (direction D in Figure 4) by the relief portions 37 and 38, and is positioned (movement is restricted) in a direction perpendicular to the direction of the axis of the two positioning pins 35 and 36 in a plan view (direction E in Figure 4).

[0018] As shown in Figures 3 and 4, the supported surface 42 formed on the side wall of the second connecting member 4 is supported by the supported surface 41 formed on the side wall of the first connecting member 3. As a result, when an external force acts to push the second connecting member 4 toward the first connecting member 3, the supported surface 42 of the second connecting member 4 is received by the supported surface 41 of the first connecting member 3. Therefore, wear and damage to the connecting portion between the first connecting member 3 and the second connecting member 4 can be prevented, and the connected state between the first connecting member 3 and the second connecting member 4 can be reliably maintained.

[0019] The above-mentioned attachment / detachment device operates as follows, as shown in Figures 1 and 2. When attaching the second connecting member 4 to the base member 5 of the first connecting member 3, from the detached state in Figure 1 to the attached state in Figure 2, the worker inserts the engaging member 32 of the second connecting member 4 into the insertion hole 7 of the base member 5 of the first connecting member 3. The tip of the engaging member 32 then comes into contact with the guide surfaces 27 and 28 of the clamp arms 10 and 11, and the engaging member 32 then separates the tips 10b and 11b of the two clamp arms 10 and 11 against the biasing force of the retaining spring 24. Subsequently, when the groove 33 of the engaging member 32 is inserted to a position facing the projections 14 and 15 of the clamp arms 10 and 11, the biasing force of the retaining spring 24 rotates the clamp arms 10 and 11, causing the projections 14 and 15 to be inserted into the groove 33 of the engaging member 32. The engaging portions 16 and 17 of the clamp arms 10 and 11 then engage with the locking portion 34 of the engaging member 32. As a result, even if an external force acts on the second connecting member 4 in a direction that would detach it from the first connecting member 3, it is received by the base member 5 via the locking portion 34 of the engaging member 32, the engaging portions 16 and 17 of the clamp arms 10 and 11, and the rotating support shafts 12 and 13. Consequently, the second connecting member 4 is prevented from being unintentionally detached from the first connecting member 3.

[0020] When removing the second connecting member 4 from the first connecting member 3, the worker grasps the two clamp arms 10 and 11 so that their operating parts 18 and 19 are brought closer together. This causes the engaging parts 16 and 17 of the clamp arms 10 and 11 to be separated from the locking part 34 of the engaging member 32. This allows the worker to remove the second connecting member 4 from the first connecting member 3 by pulling out the engaging member 32 of the second connecting member 4 from the insertion hole 7 of the first connecting member 3.

[0021] The first embodiment described above offers the following advantages. When attaching the second connecting member 4 to the first connecting member 3, inserting the engaging member 32 of the second connecting member 4 into the insertion hole 7 causes the engaging member 32 to rotate the clamp arms 10 and 11 against the biasing force of the retaining spring 24, and the engaging portions 16 and 17 of the clamp arms 10 and 11 engage with the locking portion 34 of the engaging member 32. As a result, the second connecting member 4 can be easily connected to the first connecting member 3.

[0022] Furthermore, when removing the second connecting member 4 from the first connecting member 3, the operator grasps and manipulates the two clamp arms 10 and 11 to bring them closer together, thereby separating the engaging portions 16 and 17 of the clamp arms 10 and 11 from the locking portion 34 of the engaging member 32. During this operation, the operator applies opposing pressing forces to the clamp arms 10 and 11. As a result, these pressing forces cancel each other out, and the pressing forces hardly act on other members such as the first connecting member 3 and the second connecting member 4. Therefore, it is possible to prevent the pressing force from the grasping operation from pushing the slider or the like via the first connecting member 3 and shifting its stopping position.

[0023] Figures 5 to 8 show a second embodiment of the present invention. In this second embodiment, the same (or similar) components as those in the first embodiment described above will be described using the same reference numerals. The differences between this second embodiment and the first embodiment are as follows.

[0024] In the first embodiment described above, projections 14 and 15 are provided to protrude inward from the tip portions 10b and 11b of the clamp arms 10 and 11 toward the axis C of the working chamber 8. In addition, the engaging member 32 is formed in a substantially cylindrical shape, and a locking portion 34 is formed in the circumferential direction on its outer peripheral wall. In contrast, in the second embodiment, projections 14 and 15 are provided to protrude outward from the tip portions 10b and 11b of the clamp arms 10 and 11 toward the inner peripheral wall of the working chamber 8. In addition, two engaging members 32A and 32B are provided to protrude downward parallel to the ceiling surface 31 of the top plate 29 of the second connecting member 4. Recesses 33A and 33B are formed facing each other on the side wall of the left (one) engaging member 32A and the side wall of the right (the other) engaging member 32B. Locking portions 34A and 34B are formed on the circumferential walls of these recesses 33A and 33B.

[0025] Furthermore, in the first embodiment, the right clamp arm 10 is rotatably supported on the base member 5 by a pivot shaft 12, and the left clamp arm 11 is rotatably supported on the base member 5 by another pivot shaft 13. In contrast, in the second embodiment, one clamp arm 10 and the other clamp arm 11 are rotatably supported on the base member 5 by a single pivot shaft 51.

[0026] Furthermore, in the attachment / detachment device of the first embodiment, the two reference holes 39 and 40 are circular in plan view, as shown in Figure 4. In contrast, in the attachment / detachment device of the second embodiment, as shown in Figure 8, the left reference hole 40A of the two reference holes 39A and 40A is configured to be an elongated hole in plan view. More specifically, the left reference hole 40A is formed to extend long in the direction connecting the axes of the two reference holes 39A and 40A in plan view (direction I shown in Figure 8). Relief portions 37A and 38A are formed on the peripheral wall of the elongated reference hole 40A. The shorter diameter dimension of the left reference hole 40A is the same as the diameter dimension of the reference holes 39 and 40 in the first embodiment. Also, the longer diameter dimension of the reference hole 40A in the second embodiment is configured to be longer than the diameter dimension of the reference hole 40 in the first embodiment. Furthermore, the right-side reference hole 39A in the second embodiment has the same diameter as the reference holes 39 and 40 in the first embodiment and is formed in a circular shape when viewed from above.

[0027] Furthermore, the left and right positioning pins 35A and 36A are formed to be longer than the engaging members 32A and 32B. Also, the depth dimensions of the reference holes 39A and 40A are formed to be slightly longer than the positioning pins 35A and 36A. As a result, when attaching the second connecting member 4 to the first connecting member 3, the left and right positioning pins 35A and 36A are first guided along the inner circumferential surface of the reference holes 39A and 40A and smoothly inserted, and then the engaging members 32A and 32B are inserted into the insertion holes 7. This prevents the engaging members 32A and 32B from unintentionally colliding with surrounding materials around the insertion holes 7, causing wear or damage.

[0028] Furthermore, in the attachment / detachment device of the second embodiment, as shown in Figure 7, a support member 52 is provided projecting horizontally from the support surface 41 of the first connecting member 3. The support member 52 has a small-diameter portion 52a and a large-diameter portion 52b, which are formed sequentially from the support surface side. A U-shaped guide groove 53 into which the small-diameter portion 52a is inserted is formed in the side wall of the second connecting member 4. The guide groove 53 has a small-diameter groove 53a into which the small-diameter portion 52a of the support member 52 is inserted, and a large-diameter groove 53b into which the large-diameter portion 52b is inserted. The groove width of the small-diameter groove 53a is formed to be larger than the diameter of the small-diameter portion 52a by the amount of the sliding gap, and smaller than the diameter of the large-diameter portion 52b. The groove width of the large-diameter groove 53b is formed to be slightly larger than the diameter of the large-diameter portion 52b. As a result, when an external force acts on the second connecting member 4 in a direction that separates the supported surface 42 of the second connecting member 4 from the support surface 41 of the first connecting member 3 while the second connecting member 4 is connected to the first connecting member 3, the large-diameter portion 52b of the first connecting member 3 receives the peripheral wall of the guide groove 53 of the second connecting member 4. This prevents the external force from acting on the connection portion between the first connecting member 3 and the second connecting member 4 (for example, the connection portion between the engaging members 32A, 32B and the clamp arms 10, 11), and as a result, wear and damage to that connection portion can be prevented.

[0029] The apparatus of the second embodiment described above operates as follows. When attaching the second connecting member 4 to the first connecting member 3, from the detached state in Figure 5 to the attached state in Figure 6, the positioning pins 35A and 36A are inserted into the reference holes 39A and 40A. Next, the engaging members 32A and 32B are inserted into the insertion holes 7. The tips of the engaging members 32A and 32B then come into contact with the guide surfaces 27 and 28 of the clamp arms 10 and 11. Here, the guide surfaces 27 and 28 are formed to be inclined with respect to the axial direction of the insertion holes 7. As a result, when the engaging members 32A and 32B are inserted into the insertion holes 7, the engaging members 32A and 32B move closer to the tips 10b and 11b of the two clamp arms 10 and 11, against the biasing force of the retaining spring 24. Subsequently, when the recesses 33A and 33B of the engaging members 32A and 32B are inserted to a position facing the projections 14 and 15 of the clamp arms 10 and 11, the biasing force of the retaining spring 24 causes the projections 14 and 15 of the clamp arms 10 and 11 to be inserted into the recesses 33A and 33B of the engaging members 32A and 32B. The engaging portions 16 and 17 of the clamp arms 10 and 11 engage with the locking portions 34A and 34B of the engaging members 32A and 32B. As a result, when an external force acts on the second connecting member 4 in a direction that removes the second connecting member 4 from the first connecting member 3, the locking portions 34A and 34B of the engaging members 32A and 32B and the engaging portions 16 and 17 of the clamp arms 10 and 11 are received by the base member 5 via the pivot shaft 51. Consequently, the second connecting member 4 is prevented from being unintentionally removed from the first connecting member 3.

[0030] Furthermore, when removing the second connecting member 4 from the base member 5 of the first connecting member 3, the worker grasps the two clamp arms 10 and 11 so that their operating parts 18 and 19 are brought closer together. This causes the engaging parts 16 and 17 of the clamp arms 10 and 11 to be separated from the locking parts 34A and 34B of the engaging members 32A and 32B. This allows the worker to pull out the engaging members 32A and 32B from the insertion hole 7 of the first connecting member 3. As a result, the second connecting member 4 is removed from the first connecting member 3.

[0031] In the attachment / detachment device of the second embodiment described above, the positioning pins 35A, 36A and the reference holes 39A, 40A can be omitted. In this case, the groove width of the guide groove 53 is set to be about 0.01 to 0.1 mm larger, or preferably about 0.015 mm to 0.05 mm larger, than the diameter of the small diameter portion 52a of the cylindrical support member 52, thereby achieving the same positioning effect as that of the positioning pins and reference holes 39A. In the attachment / detachment device of the above embodiment, the guide groove 53 is formed in a U-shape when viewed from the side, but it is not limited to this, and other shapes, such as a V-shape, a circular arc, or an elliptical arc, may also be used.

[0032] The second embodiment described above offers the following advantages. When attaching the second connecting member 4 to the first connecting member 3, inserting the engaging members 32A and 32B of the second connecting member 4 into the insertion holes 7 causes the engaging members 32A and 32B to rotate the clamp arms 10 and 11 against the biasing force of the retaining spring 24, and the engaging portions 16 and 17 of the clamp arms 10 and 11 engage with the locking portions 34A and 34B of the engaging members 32A and 32B. As a result, the second connecting member 4 can be easily connected to the first connecting member 3.

[0033] When removing the second connecting member 4 from the first connecting member 3, the operator grasps and manipulates the two clamp arms 10 and 11 to bring them closer together, thereby separating the engaging portions 16 and 17 of the clamp arms 10 and 11 from the locking portions 34A and 34B of the engaging members 32A and 32B. During this operation, the operator applies opposing pressing forces to the clamp arms 10 and 11, causing the opposing forces to cancel each other out. As a result, these pressing forces hardly act on other members such as the first connecting member 3 and the second connecting member 4. Consequently, the pressing force from the grasping operation does not push the slider or the like through the first connecting member 3, eliminating the need to hold down the slider. Therefore, the second connecting member 4 can be easily removed from the first connecting member 3.

[0034] Each of the above embodiments can be modified as follows: Instead of the positioning pins 35, 36, 35A, and 36A above being positioned to protrude downward from the ceiling surface 31 of the top plate 29 of the second connecting member 4, they may be positioned to protrude upward from the seating surface 6 of the first connecting member 3. In this case, the reference holes 39, 40, 39A, and 40A are formed on the top plate 29 of the second connecting member 4 at a position facing the positioning pins 35, 36, 35A, and 36A. Alternatively, a well-known positioning method may be used instead of the positioning method using the positioning pins and reference holes. For example, a cylindrical intermediate member is slidably inserted along the outer circumferential surface of a cylindrical engaging member and is biased toward the tip by an elastic body such as a spring, rubber, or resin. The intermediate member has a tapered outer circumferential surface that narrows towards the tip. A hole is formed in the top plate of the second connecting member 4 corresponding to the tapered outer circumferential surface, and a tapered inner circumferential surface that narrows toward the back of the hole is formed on the inner circumferential wall of the hole. The tapered outer surface engages with the tapered inner surface, thereby positioning the second connecting member 4 horizontally relative to the first connecting member 3 (restricting its movement). In this case, one reference hole is provided for each positioning pin, and the second connecting member 4 is positioned rotationally relative to the first connecting member 3 (restricting its movement). Instead of the biasing means 24 being provided as a retaining spring via spring receivers 22 and 23 in the middle of the two clamp arms, it may be provided between the clamp arm and another member, for example, between the clamp arm and the peripheral wall of the working chamber 8. The attachment / detachment device of the first embodiment may be configured such that the support member 52 of the second embodiment described above is provided on the first connecting member 3, and the guide groove 53 is provided on the second connecting member 4. Alternatively, the attachment / detachment devices of the first and second embodiments may be configured such that the support member 52 is provided on the second connecting member 4, and the guide groove 53 is provided on the first connecting member 3. Furthermore, it goes without saying that various modifications can be made within the scope that a person skilled in the art could foresee.

[0035] Next, the details of the attachment / detachment device of the present invention will be further explained with reference to Figure 9. In Figure 9A, the locking portion 34 of the engaging member 32 of the attachment / detachment device in the first embodiment is formed in a tapered shape that slopes downward with respect to the horizontal direction by an angle α as it extends radially outward. Therefore, when the engaging portions 16 and 17 are engaged with the locking portion 34, the biasing force of the retaining spring (biasing means) 24 acts downward on the engaging member 32 via the clamp arms 10 and 11. As a result, the ceiling surface 31 of the second connecting member 4 is in close contact with the seating surface 6 of the first connecting member 3.

[0036] The engaging portions 16 and 17 formed on the projections 14 and 15 of the clamp arms 10 and 11 are also tapered, inclined horizontally to correspond to the tapered shape of the locking portion 34. Furthermore, since the clamp arms 10 and 11 are separate components, they operate independently of each other. Therefore, when the second connecting member 4 is mounted in an inclined state relative to the first connecting member 3, only one of the two clamp arms 10 and 11 may penetrate to the position of the tapered slope of the engaging portion 16 or 17 of the engaging member 32, while the other does not penetrate to the tapered slope. At this time, since the engaging portions 16 and 17 are also designed to correspond to the tapered shape of the locking portion 34, the engaging member 32 is pushed downward by the biasing force of the retaining spring 24 via the clamp arm that has penetrated to the position of the tapered slope. Subsequently, the other clamp arm 11 engages with the engaging member 32. This resolves the inclined state.

[0037] In the attachment / detachment device of the second embodiment, a gap is formed between the guide groove 53 and the support member 52. Furthermore, since the ceiling surface 31 of the second connecting member 4 is in close contact with the seating surface 6 of the first connecting member 3, the second connecting member 4 rotates relative to the first connecting member 3 with the support member 52 as a pivot point, and there is no rattling.

[0038] On the other hand, in Figure 9B, the attachment / detachment device in the second embodiment has a modified guide groove 53 and support member 52. The surface 53c between the small-diameter groove 53a and the large-diameter groove 53b of the guide groove 53 is a tapered slope with an angle β that moves away from the first connecting member 3 as it extends vertically upward. The surface 52c between the small-diameter portion 52a and the large-diameter portion 52b of the support member 52 is a tapered slope with an angle β corresponding to the surface 53c. In this case, there is no gap between the surfaces 53c and 52c of the guide groove 53 and the support member 52, making it difficult to bring the ceiling surface 31 of the second connecting member 4 into close contact with the seating surface 6 of the first connecting member 3. As a result, the second connecting member 4 rotates around the support member 52 as a pivot point relative to the first connecting member 3, causing it to rattle.

[0039] To avoid the aforementioned looseness, a guide groove 53 and support member 52 with tapered slopes on surfaces 53c and 52c can be used. As shown in Figure 9C, two support members 52 with tapered surfaces can be provided, and two guide grooves 53 can be provided to match them. In this way, the two support members 52 and the guide grooves 53 can be engaged to position the components.

[0040] Next, the case in which the above-mentioned attachment / detachment device is used as an attachment arm H will be explained with reference to Figure 10. In the figure, the attachment arm H is provided in the resin molding apparatus M. The figure shows the attachment / detachment device of the first embodiment. In the resin molding apparatus M, one of a pair of molds (not shown) is attached to each of the platens P1 and P2. The pair of molds is closed by bringing the platens P1 and P2 close together, and resin R is poured into the molds to create resin products. After that, the molds are opened by separating the platens P1 and P2. The attachment arm H removes the resin products from the opened molds and stores them in a palate (not shown).

[0041] A mounting surface 1a is formed on the movable part 1 at the tip of the extraction arm H. A screw hole 1b is provided on the mounting surface 1a, and a tool 2 can be attached using a bolt 2d. Tool 2 may be, for example, a tool with a suction pad or a tool with nippers for a gate cutter. Tool 2 is replaced by changing the mold, etc. The attachment / detachment device is interposed between the movable part 1 and the tool 2. The first connecting member 3 is attached to the mounting surface 1a of the movable part 1 using a bolt 2c and the screw hole 1b, and the tool 2 is attached to the mounting surface 4a of the second connecting member 4 using a bolt 2d and the screw hole 1b, which is provided on the mounting surface 4a, similar to the mounting surface 1a. The separation / connection of tool 2 and the movable part 1 is performed via the attachment / detachment device.

[0042] When the second connecting member 4 is removed from the insertion hole 7 of the first connecting member 3, the engagement between the first connecting member 3 and the second connecting member 4 is released when the operator grips the two clamp arms 10 and 11. At this time, the pressing force applied to the clamp arms 10 and 11 cancels out, and the pressing force hardly acts on other members such as the first connecting member 3 and the second connecting member 4. Therefore, it is possible to prevent the pressing force from the gripping operation from pushing the movable part 1 via the first connecting member 3 and shifting its stopping position. [Explanation of symbols]

[0043] 3: First connecting member, 4: Second connecting member, 5: Base member, 6: Seat surface, 7: Insertion hole, 8: Operating chamber, 10: Clamp arm, 10a: Intermediate section, 10b: One end, 10c: Other end, 11: Clamp arm, 11a: Intermediate part, 11b: one end, 11c: other end, 12: rotating support shaft, 13: rotating support shaft, 14: projection, 15: projection, 16: engaging part, 17: engaging part, 18: operating part, 19: operating part, 24: retaining spring (biasing means), 32: engaging member, 32A: engaging member, 32B: engaging member, 33: recess, 33A: recess, 33B: recess, 34: locking part, 34A: locking part, 34B: locking part, 35: positioning pin, 35A: positioning pin, 36: positioning pin, 36A: positioning pin, 39: reference hole, 39A: reference hole, 40: reference hole, 40A: reference hole, 51: rotating support shaft

Claims

1. In a detachable device for detachably attaching a second connecting member (4) to a first connecting member (3), A seating surface (6) is formed on the base member (5) of the first connecting member (3) so that the second connecting member (4) can come into contact with it, An operating chamber (8) is formed within the base member (5) and communicates with the outside of the base member (5) through an insertion hole (7) that opens in the seating surface (6), Two clamp arms (10) and (11) are provided within the operating chamber (8) so as to be symmetrical with respect to its axis, wherein the intermediate portions (10a and 11a) of the clamp arms (10 and 11) in the longitudinal direction are rotatably supported by pivot shafts (12 and 13) and (51) protruding from the inner wall of the operating chamber (8), The engaging portion (16, 17) is formed at one end (10b, 11b) in the longitudinal direction of the clamp arm (10, 11), Operating parts (18, 19) are provided at the other ends (10c, 11c) in the longitudinal direction of the clamp arms (10, 11), A support surface (41) is formed on the base member (5) so as to intersect with the seating surface (6), A biasing means (24) that separates the operating parts (18, 19) so as to rotate the clamp arms (10, 11), The engaging members (32), (32A, 32B) are provided protruding from the ceiling surface (31) on the side of the second connecting member (4) that abuts against the seating surface (6), and are insertable into the insertion hole (7), The engaging members (32), (32A, 32B) have locking portions (34), (34A, 34B) formed on them so that the engaging portions (16, 17) can engage with each other, A supported surface (42) is formed on the second connecting member (4) so ​​as to intersect with the ceiling surface (31) and is capable of contacting the support surface (41), The device includes positioning pins (35, 36), (35A, 36A) that can be inserted into reference holes (39, 40), (39A, 40A) formed in one of the first connecting member (3) and the second connecting member (4), and that protrude from the other of the first connecting member (3) and the second connecting member (4) so ​​as to be parallel to the engaging members (32), (32A, 32B). A detachable device characterized by the following features.

2. In a detachable device for detachably attaching a second connecting member (4) to a first connecting member (3), A seating surface (6) is formed on the base member (5) of the first connecting member (3) so that the second connecting member (4) can come into contact with it, An operating chamber (8) is formed within the base member (5) and communicates with the outside of the base member (5) through an insertion hole (7) that opens in the seating surface (6), Two clamp arms (10) and (11) are provided within the operating chamber (8) so as to be symmetrical with respect to its axis, wherein the intermediate portions (10a and 11a) of the clamp arms (10 and 11) in the longitudinal direction are rotatably supported by pivot shafts (12 and 13) and (51) protruding from the inner wall of the operating chamber (8), The engaging portion (16, 17) is formed at one end (10b, 11b) in the longitudinal direction of the clamp arm (10, 11), Operating parts (18, 19) are provided at the other ends (10c, 11c) in the longitudinal direction of the clamp arms (10, 11), A biasing means (24) that separates the operating parts (18, 19) so as to rotate the clamp arms (10, 11), The engaging members (32), (32A, 32B) protrude from the ceiling surface (31) of the second connecting member (4) and are insertable into the insertion hole (7), The engaging members (32), (32A, 32B) have locking portions (34), (34A, 34B) formed on them so that the engaging portions (16, 17) can engage with each other, A support surface (41) is formed on the base member (5) so as to intersect with the seating surface (6), A supported surface (42) is formed on the second connecting member (4) so ​​as to intersect with the ceiling surface (31) and is capable of contacting the support surface (41), A guide groove (53) opening on one of the support surface (41) and the supported surface (42), into which a support member (52) protruding from the other of the support surface (41) and the supported surface (42) is inserted, A detachable device characterized by the following features.

3. In the attachment / detachment device of claim 1 or claim 2, The clamp arms (10, 11) have projections (14, 15) facing each other at one end (10b, 11b) of the clamp arms (10, 11) and projecting toward the axis of the working chamber (8). The engagement portion (16, 17) is formed by a part of the aforementioned projection (14, 15), A recess (33) is formed in the outer wall of the engaging member (32). The locking portion (34) is formed by a part of the recess (33). A detachable device characterized by the following features.

4. In the attachment / detachment device of claim 1 or claim 2, The projection (14) protruding from one end (10b) of one clamp arm (10) and the projection (15) protruding from one end (11b) of the other clamp arm (11) are formed facing the inner wall of the working chamber (8) so that they do not face each other. The engagement portion (16, 17) is formed by a part of the aforementioned projection (14, 15), The second connecting member (4) is provided with two of the engaging members (32A, 32B), The recess (33A) formed in one of the engaging members (32A) and the recess (33B) formed in the other engaging member (32B) face each other. The locking portion (34A, 34B) is formed by a part of the recess (33A, 33B). A detachable device characterized by the following features.

5. In the attachment / detachment device of claim 2, The support member (52) has a small diameter portion (52a) and a large diameter portion (52b) that are formed sequentially from the base end to the tip end. A detachable device characterized in that the small-diameter portion (52a) of the support member (52) is inserted into the guide groove (53).

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