JPH0646834U - Mounting device for ring-shaped elastic member - Google Patents

Abstract

(57) [Summary] [Purpose] An O-ring can be easily attached to the annular groove formed at the deep position of the hole. [Structure] The O-ring R1 is provided between the right end portion of the sliding member 3 and the tapered curved surface portion 8 inside the right end portion of the guide tube 2 when the sliding member 3 slides to the left end side of the guide tube 2. One side portion of the rod 5 is protruded from the right end portion of the guide tube 2 so as to abut against the tapered curved surface portion 8 and the other side portion is obliquely externally directed toward the sliding member 3. Device 1 in this state
After inserting into the hole H, the sliding member 3 pushes the other side of the O-ring R1 to the right. At the time of insertion, the maximum diameter portion 8a of the tapered curved surface portion 8 is arranged on the right side wall surface of the annular groove G1, and the right end portion of the guide tube 2 is arranged in front of the annular groove G1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a ring-shaped elastic member mounting device for mounting a ring-shaped elastic member in an annular groove formed in an inner peripheral surface of a hole of a workpiece.

[0002]

[Prior art]

 Some machine tool parts and the like have support holes for rotatably or slidably supporting a shaft or the like. An annular groove is generally formed on the inner peripheral surface of the support hole, and an O-ring or the like is formed in the annular groove to prevent leakage of lubricating fluid, cutting fluid, or the like from between the support hole and the shaft. The ring-shaped elastic member is attached.

Then, in order to mount the ring-shaped elastic member in the annular groove, the ring-shaped elastic member is pressed inward in the radial direction by using a hand or the like to reduce the diameter to a diameter smaller than the inner diameter of the support hole. After inserting the ring-shaped elastic member into the support hole, push the ring-shaped elastic member to the position of the annular groove with the same hand, so that the elastic force of the ring-shaped elastic member is generated at the position of the annular groove. The diameter is increased and the ring groove is mounted.

However, in the method of mounting the ring-shaped elastic member in the annular groove described above, since the diameter of the ring-shaped elastic member is reduced to be smaller than the inner diameter of the support hole, the deformation amount becomes large and the ring-shaped elastic member becomes large. In some cases, when the member was pushed into the position of the annular groove, the ring-shaped elastic member would not return to its original shape and could not be mounted in the annular groove.

Further, since the ring-shaped elastic member is inserted into the support hole with a diameter smaller than the inner diameter of the support hole, the ring-shaped elastic member is pressed into contact with the inner peripheral surface of the support hole with a large force. It becomes a state. Therefore, if the ring-shaped elastic member is pushed to the position of the annular groove in this state, a large frictional force is generated between the ring-shaped elastic member and the inner peripheral surface of the support hole, and the ring-shaped elastic member is damaged. Even if the ring-shaped elastic member is properly mounted in the annular groove, there is a problem that the cutting fluid leaks from the scratches and cannot play the role of preventing fluid leakage.

Further, the work of pressing the ring-shaped elastic member inward in the radial direction by using a hand or the like, and after inserting the ring-shaped elastic member in a reduced diameter into the support hole, the ring-shaped elastic member is also pressed by a hand or the like. The work of pushing the member to the position of the annular groove is extremely troublesome, and when the annular groove is formed deep in the support hole, it becomes difficult to mount the ring-shaped elastic member in the annular groove. There was a problem of becoming.

[0007]

[Problems to be solved by the device]

 The present invention has been made in order to eliminate such inconvenience, and it is possible to reduce the deformation amount of the ring-shaped elastic member as much as possible and prevent the ring-shaped elastic member from being scratched. An object of the present invention is to provide a ring-shaped elastic member mounting device that can easily mount a ring-shaped elastic member in an annular groove even when the annular groove is formed at a deep position in the hole.

[0008]

[Means for Solving the Problems]

 In order to achieve such an object, the present invention provides a ring-shaped elastic member mounting device for mounting a ring-shaped elastic member in a ring-shaped groove formed on an inner peripheral surface of a hole of a workpiece, wherein a tip portion of the hole is the hole. A guide tube having an inner diameter smaller than the outer diameter of the ring-shaped elastic member, and a distal end of the guide tube projecting from the distal end of the guide tube. While the ring-shaped elastic member inserted into the tip end portion of the guide tube is pressed by the inner circumferential surface of the tip end portion of the guide tube in an elliptical shape, one side portion thereof is projected from the tip end portion of the guide tube and A shaft member that is obliquely inserted with its side portion directed toward the rear end side of the guide tube, and is connected to the tip end portion of the shaft member. The ring externally attached to the shaft member A guide member having a tapered curved surface portion against which one side portion of the elastic member abuts, and the other side portion of the ring-shaped elastic member are slidably inserted into the guide tube and slid toward the tip side. Of the guide tube, a sliding member that presses in the direction, a guide tube restricting unit that restricts the insertion length of the guide tube into the hole so that the front end portion of the guide tube is located in front of the annular groove, and When the insertion length is restricted, the distance between the tip of the guide tube and the maximum diameter of the tapered curved surface is arranged so that the maximum diameter of the tapered curved surface is located on the side wall surface on the inner side of the annular groove. And a guide member regulating means for regulating.

Further, in the present invention, the guide pipe regulating means is provided at a rear end portion of the guide pipe so as to come into contact with the work when the guide pipe is inserted into the hole, and further, the guide pipe is provided. The restriction means is movable in the axial direction with respect to the guide tube, and fixing means for fixing the guide tube restriction means to the guide tube is provided between the guide tube restriction means and the guide tube. It is characterized by.

[0010]

[Action]

 To mount the ring-shaped elastic member in the annular groove formed on the inner peripheral surface of the hole of the work using the ring-shaped elastic member mounting device of the present invention, first, attach the sliding member to the rear end side of the guide tube. After sliding, the ring-shaped elastic member is attached to the shaft member between the tip of the sliding member and the curved surface of the guide inside the tip of the guide tube, and one side of the ring-shaped elastic member is attached to the tip of the guide tube. The taper curved surface is brought into contact with the tapered curved surface portion and the other side portion is obliquely extrapolated toward the sliding member. In the externally inserted state, the ring-shaped elastic member is pressed into an elliptical shape by the inner peripheral surface of the distal end portion of the guide tube.

Next, in this state, the device is inserted into the hole of the work. At this time, the tip portion of the guide tube is arranged in front of the annular groove by the guide tube restricting means, and the maximum diameter portion of the tapered curved surface portion is arranged on the inner side wall surface of the annular groove by the guide member restricting means. ing.

Next, the sliding member is slid to the tip side of the guide tube, and the tip portion of the sliding member presses the other side portion of the ring-shaped elastic member in the same direction. Then, one side part of the ring-shaped elastic member slides along the tapered curved surface part toward the maximum diameter part and is guided to the annular groove, while the other side part moves the inner peripheral surface of the guide tube to the tip part of the guide tube. It slides toward and is guided in the annular groove, whereby the ring-shaped elastic member is mounted in the annular groove. Note that the device is pulled out from the hole after being installed.

Further, the guide tube restricting means is provided at the rear end portion of the guide tube so as to contact the work when the guide tube restricting means is inserted into the hole of the guide tube, and the guide tube restricting means is moved in the axial direction with respect to the guide tube. In addition, if the fixing means for fixing the guide tube restricting means to the guide tube is provided between the guide tube restricting means and the guide tube, the insertion length of the guide tube into the hole can be adjusted. Therefore, even if the annular groove is arranged at a shallow position and / or a deep position of the hole, the ring-shaped elastic member can be easily attached to the annular groove with one device.

[0014]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. In this embodiment, as shown in FIG. 1, the O-ring R1 is formed in the annular grooves G1 and G2 formed adjacent to each other on the inner peripheral surface at the deep position of the hole H formed inside the hollow spindle S. , R2 is used as an example. Further, although holes having various diameters are actually formed inside the hollow spindle S, in the present embodiment, for convenience of explanation, holes H having the same diameter are formed inside the hollow spindle S. Be present. FIG. 1 is a sectional view of an essential part of an O-ring mounting apparatus according to an embodiment of the present invention, FIG. 2 is a left side view of FIG. 1, FIG. 3 is a sectional view taken along line III-III of FIG. 1, and FIG. FIG. 6 is a cross-sectional view of a main part for explaining a method of attaching an O-ring to the.

In FIG. 1, reference numeral 1 denotes an O-ring mounting device (hereinafter, simply referred to as “device”), and this device 1 includes a guide tube 2 that is long in the left-right direction. The outer diameter of the guide tube 2 is formed to be the same as or slightly smaller than the hole diameter of the hole H, whereby the guide tube 2 can be inserted and removed with the axis line of the hole H aligned. . The inner diameter of the guide tube 2 is smaller than the outer diameter of the O-rings R1 and R2. Inside the guide tube 2, a cylindrical sliding member 3 is inserted and arranged so as to slide inside the guide tube 2.

The sliding member 3 is for pressing the other side portion of the O-ring R 1 (R 2) described later to the right, and its axial length is slightly longer than that of the guide tube 2. As shown in FIGS. 1 and 2, a slit 4 penetrating from one side portion to the other side portion is formed at the center of the left end surface of the sliding member 3. Inside the sliding member 3, a rod 5 is inserted and arranged with its right end protruding from the right end of the guide tube 2 and its left end protruding from the bottom of the slit 4 into the slit 4.

Small-diameter screw portions 6a and 6b are formed on the left and right ends of the rod 5, respectively. A guide member 7 having a diameter slightly smaller than the hole diameter of the hole H is fitted into the small-diameter screw portion 6b and tightened with a nut 7a. It is fixed. On the outer peripheral surface of the left end portion of the guide member 7, there is formed a tapered curved surface portion 8 whose diameter gradually increases toward the right.

At the left end of the guide tube 2, when the right end of the guide tube 2 is inserted into the hole H, a restriction nut 9 that abuts against the left end surface of the hollow spindle S to restrict the insertion length of the guide tube 2. Are screwed together. When the insertion length is regulated, the right end portion of the guide tube 2 is arranged in front of the annular groove G1 (or G2). A screw hole 10 that penetrates to the inner peripheral surface is formed on the outer peripheral surface of the restriction nut 9, and the restriction nut 9 is fixed to the guide tube 2 by screwing a screw 11 into the screw hole 10. In addition, when the restriction nut 9 is rotated by loosening the screw 11, the restriction nut 9 moves in the axial direction thereof, whereby the insertion length of the guide tube 2 can be adjusted.

When the insertion length of the guide tube 2 is restricted, the small diameter threaded portion 6 a of the rod 9 contacts the left end surface of the guide tube 2 and has the maximum diameter portion 8 a of the tapered curved surface portion 8 described above. The regulating plate 12 arranged on the right side wall surface of the annular groove G 1 (or G 2) is tightened and fixed by the nut 13. In the fixed state, the regulation plate 12 extends in the radial direction of the guide tube 2 so as to ensure the axial movement of the sliding member 3, and both ends thereof are loosely inserted in the slit 4. In order to mount the O-rings R1 and R2 in the annular grooves G1 and G2 using the device 1 having the above structure, first, the sliding member 3 is slid to the left end side of the guide tube 2. After that, the O-ring R1 is fitted from the guide member 7, and the O-ring R1 is attached to the rod 5 between the right end portion of the sliding member 3 and the tapered curved surface portion 8 inside the right end portion of the guide tube 2. One side portion is protruded from the right end portion of the guide tube 2 and brought into contact with the tapered curved surface portion 8, and the other side portion is obliquely externally attached toward the sliding member 3. In the externally inserted state, the O-ring G1 is pressed in an elliptical shape by the inner peripheral surface of the right end portion of the guide tube 2 (see FIG. 3).

Next, in this state, the device 1 is inserted into the hole H and the regulating nut 9 is brought into contact with the left end surface of the hollow spindle S. At this time, as described above, the right end portion of the guide tube 2 is arranged in front of the annular groove G1, and the maximum diameter portion 8a of the tapered curved surface portion 8 is arranged on the wall surface on the right side of the annular groove G1.

Next, the left end of the sliding member 3 is pushed rightward, and the right end of the sliding member 3 pushes the other side of the O-ring R 1 in the same direction. Then, as shown by the chain double-dashed line in FIG. 1, one side of the O-ring R1 slides along the tapered curved surface 8 toward the maximum diameter portion 8a and is guided to the annular groove G1, while the other side Slides on the inner peripheral surface of the guide tube 2 to the right end side and is guided to the annular groove G1. As a result, as shown in FIG. 4, the O-ring R1 is mounted in the annular groove G1.

After mounting the O-ring R1, the device 1 is pulled out from the hole H and separated. Next, after loosening the screw 11, the regulating nut 9 is rotated and moved to the right by a predetermined amount, and the regulating nut 9 contacts the left end surface of the hollow spindle S to regulate the insertion length of the guide tube 2. When inserted, the insertion length is adjusted so that the maximum diameter portion 8a of the tapered curved surface portion 8 is located on the right wall surface of the annular groove G2. Then, the O-ring R2 is mounted in the annular groove G2 in exactly the same manner as in the case of the O-ring R1 described above, and the device 1 is pulled out from the hole H and separated. As a result, the O-rings R1 and R2 are mounted in the annular grooves G1 and G2.

[0023]

As is apparent from the above description, according to the present invention, the ring-shaped elastic member is provided between the tip end of the sliding member and the tapered curved surface inside the tip end of the guide tube. One side of the member is protruded from the tip end of the guide tube to abut the tapered curved surface, and the other side is obliquely inserted toward the sliding member. Therefore, the ring-shaped elastic member is pressed and arranged in an elliptical shape inside the guide tube. Therefore, the amount of deformation of the ring-shaped elastic member can be significantly reduced as compared with the conventional case where the diameter of the ring-shaped elastic member is reduced to be smaller than the inner diameter of the hole.

Further, since the ring-shaped elastic member is mounted in the annular groove only by sliding on the tapered curved surface portion and the inner peripheral surface of the distal end portion of the guide tube in the vicinity of the annular groove, the sliding dimension is very short. It is possible to prevent the ring-shaped elastic member from being scratched at the time of mounting as in the conventional case.

Further, after inserting a device corresponding to the size up to the annular groove into the hole, the other side portion of the ring-shaped elastic member is pressed toward the tip end side by the sliding member so that the ring-shaped elastic member is inserted into the annular groove. Since the ring-shaped elastic member can be mounted, the ring-shaped elastic member can be mounted very easily even when the annular groove is formed at the deep position of the hole.

Further, the guide pipe restricting means is provided at the rear end portion of the guide pipe so as to contact the work when the guide pipe is inserted into the hole of the guide pipe, and the guide pipe restricting means is arranged in the axial direction with respect to the guide pipe. If the guide tube restricting means is fixed and the guide tube restricting means is fixed between the guide tube restricting means and the guide tube, the insertion length of the guide tube into the hole is adjusted. Therefore, even if the annular groove is arranged at a shallow position and / or a deep position of the hole, the ring-shaped elastic member can be easily attached to the annular groove with one device.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of an O-ring mounting device according to an embodiment of the present invention.

FIG. 2 is a left side view of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a cross-sectional view of an essential part for explaining a method of mounting an O-ring in an annular groove.

[Explanation of symbols]

1 ... O-ring mounting device, H ... hole, R1, R2 ... O ring, G1, G2 ... Annular groove, 2 ... Guide tube, 3 ... Sliding member, 5 ... Rod, 7 ... Guide member, 8 ... Tapered curved surface Division, 8
a ... maximum diameter part, 9 ... restriction nut, 11 ... screw, 12 ... restriction plate

Claims (2)

[Scope of utility model registration request] 1. A ring-shaped elastic member mounting device for mounting a ring-shaped elastic member in an annular groove formed in an inner peripheral surface of a hole of a workpiece, wherein a tip portion is removably inserted into the hole. A guide tube having an inner diameter smaller than the outer diameter of the ring-shaped elastic member, and a distal end portion of the guide tube is inserted into the guide tube so as to project from the distal end portion of the guide tube and inserted into the distal end portion of the guide tube. The ring-shaped elastic member causes one side portion of the ring-shaped elastic member to project from the tip end portion of the guide tube while being pressed in an elliptical shape by the inner peripheral surface of the tip end portion of the guide tube, and the other side portion to the rear end of the guide tube. A shaft member that is obliquely inserted toward the side, and the ring shape that is connected to the front end of the shaft member and that is gradually expanded in diameter toward the front end on the outer peripheral surface of the rear end and is externally inserted into the shaft member. The contact with one side of the elastic member A guide member in which a curved surface portion is formed; a sliding member that is slidably inserted into the guide tube and slides toward the tip side to press the other side portion of the ring-shaped elastic member in the same direction; Guide tube restricting means for restricting an insertion length of the guide tube into the hole so as to dispose the tip end portion of the guide tube in front of the annular groove; and the taper when the insertion length of the guide tube is restricted. Guide member restriction means for restricting the distance between the tip end portion of the guide tube and the maximum diameter portion of the tapered curved surface portion so that the maximum diameter portion of the curved surface portion is arranged on the side wall surface on the inner side of the annular groove. An attachment device for a ring-shaped elastic member, characterized in that: 2. The guide pipe regulating means is provided at a rear end portion of the guide pipe so as to come into contact with the work when the guide pipe is inserted into the hole, and the guide pipe regulating means is provided in the guide pipe. While being movable in the axial direction with respect to, between the guide pipe restricting means and the guide pipe,
2. The ring-shaped elastic member mounting device according to claim 1, further comprising fixing means for fixing the guide tube restricting means to the guide tube.