JPH0611172Y2 - Reversing device for elastic cylinder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a device for reversing an elastic cylinder formed of rubber, resin or the like.

[Prior Art] For example, a universal joint boot as shown in Fig. 7 is known. This boot is relatively thick (about 3mm)
It has a trumpet shape and is made of chloroprene rubber.

By the way, it is necessary to caulk and attach the metal fitting to one end of the boot that spreads like a trumpet, and it is necessary to attach the metal fitting in a state where the boot is inverted due to the configuration of the caulking device. The work of reversing these boots has conventionally relied on human hands, and is performed by a worker reversing them with fingers or using a hook-shaped jig.

[Problems to be Solved by the Invention] Since the boot described above is thick, it is difficult to reverse it, and the number of steps is large. Also, if it is a thin-walled boot, you can reverse it just by holding one end and pulling it up,
The inversion process can be automated. However, since the thick boots described above have high rigidity, it is difficult to reverse them by such a method.

The present invention has been made in view of such circumstances,
Provided is a reversing device capable of automatically reversing a thick-walled cylinder without human intervention.

[Means for Solving Problems] An inversion device for an elastic tubular body of the present invention includes a holding portion that holds one end of a tubular body having a central hole, and an axial direction of the tubular body held by the holding portion. A first pressing device that presses the one end or the other end of the cylindrical body to reverse most of the one end to the other end; and the one end that is linearly driven in a direction intersecting the axial direction at an acute angle. A second pressing device that presses a part of the other end located inside the reversing center hole that is formed by reversing from the above and presses it into the center hole; and a substantially linear line with respect to the driving direction and axial direction of the second pressing device. Thirdly driven symmetrically and further pressing the other end to invert the other end
It is characterized by comprising a pressing device.

The reversing device of the present invention comprises a holding part, a first pressing device, and a second pressing device.
It is composed of a pressing device and a third pressing device.

The holding portion has a function of holding one end of the tubular body. Here, the tubular body according to the present invention is not limited to the trumpet-shaped boot described in the related art, but a general cylindrical body,
Depending on the case, a tubular body having a polygonal cross section can be used.

The first pressing device has a function of being driven in the axial direction of the tubular body, pressing the other end so as to approach the one end held by the holding part, and pushing the other end into the central hole. When the tubular body is formed thin and has low rigidity, it can be reversed only by the first pressing device.

By this first pressing device, most of the direction from one end to the other end is inverted to form an inverted center hole in which the inner peripheral surface of the center hole is on the outer side and the outer peripheral surface is on the inner side. In addition, it is preferable that the length of the other end portion remaining in the center hole is short because the next step is easy.

The second pressing device is driven in a direction intersecting the axial direction of the cylindrical body at an acute angle, and has a function of pressing a part of the other end located in the inversion center hole. As a result, a part of the other end has a shape that is crushed toward the center hole, and the crushed portion enters the center hole.

The third pressing device is driven substantially in line symmetry with the second pressing device, and has the function of reversing the whole by further pressing the other end remaining in the reversing center hole.

It is desirable that the tip of the second pressing device has a tapered shape with an acute angle in cross section. By doing so, it is possible to easily engage with the ring-shaped groove formed by the inner peripheral surface of the inverted center hole and the outer peripheral surface of the other end, and surely press a part of the other end into the center hole. It can be carried out. Further, it is desirable that the tip of the third pressing device has a flat surface perpendicular to the axial direction. By doing so, the area of contact with the surface of the other end located in the inversion center hole can be increased, and the pressing force of the third pressing device can be applied to the other end on average, so that the inversion Will be even easier.

[Operation and Effect of the Invention] In the reversing device of the present invention, first, the first pressing device is driven in the axial direction of the tubular body to press the other end in the direction approaching the one end held by the holding portion. As a result, the other end is pushed into the center hole, and most of the direction from one end to the other end is inverted. Even at this time, the one end portion maintains the state of being held by the holding portion.

In that state, the second pressing device is then linearly driven in a direction intersecting the axial direction at an acute angle. As a result, a part of the other end located in the inversion center hole is fired and enters the center hole.

Then, the third pressing device advances and presses the other end remaining in the inversion center hole. At this time, the elastic reaction force that a part of the other end portion, which is located in the center hole, is opened, and the pressing force of the third pressing device acts in the direction of reversing the other end portion. The part is easily inverted.

Therefore, according to the reversing device of the present invention, by reversing each end portion, the whole can be easily reversed without requiring a large force.

[Examples] Specific examples will be described below. This embodiment relates to a trumpet-shaped boot reversing device shown in FIG.

FIG. 1 is a front view of a reversing device according to an embodiment of the present invention, and FIG.
The figure shows a cross-sectional view of the main part. This reversing device has a base 1
A first cylinder device 2 held by the base 1 and driven in the vertical direction; and a second cylinder device 3 held by the first cylinder device 2 and reciprocally driven in a direction intersecting the vertical direction at an acute angle. A third cylinder device 4 which is held by the first cylinder device 2 and is reciprocally driven substantially in line symmetry with the driving direction of the second cylinder device 3, and a fourth cylinder which is opposed to the first cylinder device 2 and is vertically driven. It is composed of a device 5 and a guide 6 fixed to the base 1 and holding the boot 100.

The first cylinder device 2 is composed of a first cylinder 20 fixed to the base 1 and driven to reciprocate in the vertical direction, and a truncated cone-shaped torpedo 21 held at the tip of the piston rod of the first cylinder 20. The torpedo 21 is fixed to the movable plate 10, and the movable plate 10 is slidable in the vertical direction along the guide rod 11. The tip of the torpedo 21 has an outer diameter smaller than the opening diameter of the boot 100.

The second cylinder device 3 includes a second cylinder 30 fixed to the torpedo 21, and a first push rod 31 held at the tip of the piston rod of the second cylinder 30. First
The push rod is configured to be slidable in the groove portion 211 formed in the torpedo 21. Further, the tip end of the first push rod 31 has a tapered shape with an acute cross section.

The third cylinder device 4 includes a third cylinder 40 held by the torpedo 21, and a second push rod 41 held by the tip of the piston rod of the third cylinder device 40.
This second push rod 41 is similar to the first push rod 31 in the torpedo 2
The groove portion 212 formed inside 1 is slidable. The movement directions of the first push rod 31 and the second push rod 41 are
It is formed substantially symmetrically with respect to the vertical direction, and is configured to intersect with the vertical direction at an angle of about 15 °.

The fourth cylinder device 5 is composed of a fourth cylinder 50 fixed to the base 1 and a plate 51 held at the tip of the piston rod of the fourth cylinder 50. Plate 51
A through hole 511 having a diameter larger than the maximum diameter of the guide 6 and smaller than the maximum diameter of the boot 100 is formed therein.

The operation of the reversing device of this embodiment configured as described above will be described below.

First, as shown in FIG. 1, the boot 100 is held by the guide 6, and one end 101 having a large diameter is in contact with the plate 51.

Next, the first cylinder device 2 is driven, the torpedo 21 descends, and the tip end portion thereof contacts the tip end portion of the guide 6. Then, the fourth cylinder device 5 is driven and the plate 51 moves up. At this time, the plate 51 functions as a holding portion to hold and press the one end portion 101 of the boot 100. The other end portion 102 of the boot 100 has the torpedo 21.
It comes into contact with the peripheral surface of and does not move any further. Therefore, the plate 51 rises to a predetermined position while gradually inverting the one end portion 101. The state is shown in FIG. The state of the boot 100 at this time is shown in a sectional view in FIG. In this way, the boot 100 has the inverted center hole 103 formed by inverting the one end 101, and the other end 102 having the central hole 104 is located in the inverted center hole 103.

Next, the plate 51 and the torpedo 21 are both lifted to separate the boot 100 from the guide 6. While maintaining this state, the second cylinder device 3 is driven and the second push rod 31 moves forward. At this time, since the tip end of the second push rod 31 has a tapered shape, the inner peripheral surface of the inversion center hole 103 and the other end portion 10
(2) It is easily fitted into a ring-shaped groove portion 105 formed by the outer peripheral surface and a part of the other end portion 102 is pushed into the center hole 104. The state is shown in FIG. In this way, the second push rod 3
When the ring-shaped groove portion 105 is pressed by 1, the tip becomes a bag shape and it becomes difficult to push the second push rod 31 for a certain distance or more. When the second push rod 31 is retracted in that state, the other end 10
2 enters into the central hole 104 in a narrowed state and is held in that state.

Next, the third push rod 41 moves forward with the second push rod 31 retracted. A horizontal surface is formed at the tip of the third push rod 41, and the area for pressing the other end 102 located in the inversion center hole 103 is large. The other end 102 remaining in the inversion center hole 103 at the tip of the third push rod 41.
When is pressed, as shown in FIG. 6, the elastic reaction force in the opening direction of the part of the other end portion 102 that has been pressed into the center hole 103 and is substantially the same as the pressing force of the third push rod 41. The other end 102 is easily inverted. This allows the boot 100 to be inverted.

Therefore, according to the reversing device of the present embodiment, it is possible to reverse the thick boot without manpower, and the number of steps can be remarkably reduced.

[Brief description of drawings]

FIG. 1 is a front view of a reversing device according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of a main part of FIG. 1, and FIG. 3 is a front view of a main part of the reversing device showing a state of being reversed. FIG. 4 is a cross-sectional view of the boot in the middle of being inverted, FIGS. 5 and 6 are cross-sectional views showing the state in the middle of being inverted, and FIG. 7 is a half-sectional view of the boot. DESCRIPTION OF SYMBOLS 1 ... Base, 2 ... 1st cylinder device 3 ... 2nd cylinder device (2nd pressing device) 4 ... 3rd cylinder device (3rd pressing device) 5 ... 4th cylinder device (1st pressing device) 6 ... Guide 51 ... Plate (holding part) 101 ... One end part, 102 ... Other end part

Claims (2)

[Scope of utility model registration request] 1. A holding portion for holding one end portion of a tubular body having a central hole, and an axially driven portion of the tubular body held by the holding portion to press the one end portion or the other end portion of the tubular body. A first pressing device for reversing most of the direction from the one end to the other end, and an inversion center formed by reversing from the one end driven linearly in a direction intersecting the axial direction at an acute angle. A second pressing device that presses a part of the other end located in the hole and presses it into the central hole; and a second pressing device that is driven substantially linearly symmetrically with respect to the driving direction of the second pressing device and the axial direction. An elastic cylinder reversing device comprising: a third pressing device that further presses the other end to invert the other end. 2. The elastic cylinder according to claim 1, wherein the tip of the second pressing device has a taper shape with an acute angle in cross section, and the tip of the third pressing device has a plane perpendicular to the axial direction. Body inverting device.