JP2947997B2 - Assembling device for mating parts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for assembling a fitting part which simultaneously fits an outer cylinder part, an inner cylinder part, and a shaft part in a state where they are assembled together.

[0002]

2. Description of the Related Art For example, as in an automobile shock absorber, (a) an outer cylindrical part having a cylindrical shape, and (b) an inner cylindrical part having an axial dimension shorter than the outer cylindrical part. And (c) a large-diameter portion fitted into the cylinder of the inner cylinder part in a part of a cylindrical shape having an axial dimension longer than the outer cylinder part. And (d) an inner cylindrical part of the outer cylindrical part such that the axial part, the outer cylindrical part, and the inner cylindrical part are concentric with each other. There is an assembly having a ring-shaped fitting part fitted to each. When constructing such an assembly, as shown in FIG. 4, the inner cylinder part 14 is immersed in the outer cylinder part 12 and the cylindrical tip part of the shaft part 16 is separated from the outer cylinder part 12. Taking the method of assembling the fitting parts 18 to them after they have been assembled to each other in the primary assembly state in which the protrusions 20 protrude is attempted because of the advantage that the assembling operation can be performed in a short time in a single step. ing. The apparatus for assembling fitting parts described in Japanese Patent Application Laid-Open No. 2-224932 is an example of an apparatus for performing such an assembling method, and includes a center member arranged so as to be able to be pushed upward. The shaft-shaped part and the inner cylinder part are lifted by the gripping device in a state where the shaft-shaped part is centered, and the shaft-shaped part and the inner cylinder part are centered concentrically with the outer cylinder part, and the center part is positioned relative to the center member. The fitting member is pushed down by a pushing member which is driven downward in such a manner that the fitting component is fitted into each of the outer cylinder component, the inner cylinder component, and the shaft-shaped component, thereby performing automatic assembly.

[0003]

However, the above-mentioned conventional assembling apparatus is for assembling fitting parts to parts of a single specification having a certain dimensional relationship with each other. Since the lower end position of the center member to be lowered and the lower end position of the push member that is lowered until the fitting part is completely pressed are set at fixed positions, general-purpose parts of various specifications with different dimensions are used. There was no sex. More specifically, even though the radial dimensions of the parts are common to each other, as shown in FIG. 4, the axial dimensions A, B, and C of the outer cylinder part, the inner cylinder part, and the shaft-shaped part, respectively. May be different depending on the specifications. For this reason, for example, when the dimension C is large, the pressing stroke of the center member in the centered state of the shaft-shaped component is shorter than a predetermined length, and the gripping device cannot sufficiently lift the shaft-shaped component, or the like. When the dimension C is small, the center member does not reach the shaft-shaped part and the centering of the shaft-shaped part cannot be performed, or the protrusion dimension D of the shaft-shaped part from the inner cylindrical part has a relatively large variation. In such a case, in the conventional apparatus, the gripping device is fixed so as not to be relatively movable with respect to the pushing member and can be moved integrally with the pushing member. By gripping at the position, the centering accuracy of shaft-shaped parts etc. may be reduced,
There has been a problem that the shaft-shaped component cannot be gripped.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide mating parts corresponding to a plurality of types of parts having different axial dimensions. An object of the present invention is to provide an assembling apparatus for a fitting component that can be assembled.

[0005]

In order to achieve the above object, the center member is always centered while the center member is always in a state in which the center member can be moved upward relative to the lifting amount by the gripping device. It is sufficient that the position of the gripping device with respect to is fixed irrespective of the position of the push-in member.
(B) an inner cylinder part, (c) an axial part, and (d) its axial shape
Parts, the outer cylinder part and the inner cylinder part are concentric with each other.
So that the shaft-shaped part, the outer cylinder part,
Stepped annular shape that can be fitted to each of the inner and inner cylinder parts
In the assembly having the shape of the fitting part, the inner cylindrical part is immersed in the outer cylindrical part, and the cylindrical end parts of the shaft-shaped part are protruded from the outer cylindrical part. An apparatus for assembling the fitting parts to them after being assembled, wherein (e) the posture in which the outer cylinder part, the inner cylinder part, and the shaft part in the primary assembly state are substantially vertical. A first elevating member disposed movably in the up-down direction above the assembling position arranged in;
(F) The first elevating member is formed in a rod shape, and is arranged so as to be able to be pushed upward by a predetermined constant pushing stroke on the center axis of the assembling position, and is always urged downward. And a center member that is held at the lower moving end and that is engaged with the distal end of the shaft-like component when the first lifting member is driven downward to center the shaft-like component. g) driving the first lifting member downward, and
As the elevating member descends, the center member is engaged with the shaft-shaped component and moves relatively upward with respect to the first elevating member to reach the upper moving end, so that that of the first elevating member While lowering to the position where the above-described lowering is prevented, the first elevating member is driven upward from that state to ascend by a predetermined constant return distance smaller than the pushing stroke of the center member. A first driving device for positioning the elevating member at an assembling height corresponding to the height dimension of the shaft-like component; and (h) a second driving device provided on the first elevating member so as to be vertically movable relatively. (I) provided on the second elevating member, wherein the second elevating member moves downward when the first elevating member is positioned at the assembly height. Driven By this, a pushing member which comes into contact with the fitting component previously fitted to the shaft-shaped component, pushes down the fitting component, fits the fitting component to the outer cylinder component and the inner cylinder component, and assembles the fitting component And (j) being provided on the second elevating member so as to be relatively movable in the up and down direction, and being always urged downward and moved up and down together with the second elevating member while being held at the lower moving end. While
A stopper that engages with the first elevating member at a separated position that is lowered by a predetermined constant separation stroke with respect to the first elevating member; A third elevating member that is relatively moved with respect to the second elevating member when the second elevating member is driven downward; and (k) the first elevating member is positioned at the assembly height, and In the state where the elevating member is held at the separated position by the stopper, the third elevating member is disposed at substantially the same height as the tip of the shaft-shaped component centered by the center member. The tip of the shaft-like part is gripped on the center axis of the assembly position, and the third elevating member is raised as the second elevating member is driven upward. By A gripping device that lifts and suspends the shaft-shaped part and the inner cylindrical part fitted to the large-diameter portion of the shaft-shaped part while pushing the center member upward within a range not exceeding the return distance. It is characterized by the following.

[0006] Preferably, the assembling apparatus includes (1)
The second elevating member is provided so as to be relatively movable in the up-down direction, and is always urged downward to be held at the lower moving end. While engaging with the upper end of the cylindrical part, the outer cylindrical part is positioned in a substantially vertical position on the center axis of the assembling position, and after engaging with the outer cylindrical part, further lowering is prevented. (M) whether or not the relative movement amount between the outer cylinder positioning member and the pushing member has reached a predetermined assembly stroke required for assembling the fitting part; And detecting means for detecting.

[0007]

In the apparatus for assembling fitting parts as described above, the first elevating member provided with the center member which can be pushed upward by a certain pushing stroke is assembled in the primary assembly state. When driven by the first driving device toward the outer cylinder part, the inner cylinder part, and the shaft part arranged at the position, the center member abuts on the shaft part and the upper part of the relative movement with respect to the first elevating member is higher. After being once lowered until the moving end is reached and further lowering is prevented, the center member is raised by a fixed return distance smaller than the above-mentioned movement stroke, so that the center member can move relative to the return distance. The first elevating member is positioned at an assembly height according to the height dimension of the shaft-like component so that the shaft-like component can be centered in this state. Also, the second lifting member driven downward by the second driving device to push down the fitting component via the pushing member is initially lowered together with the second lifting member, but is moved downward with respect to the first lifting member. A third elevating member, which is prevented by a stopper engaged with the first elevating member from descending beyond a predetermined separation stroke, is provided, and the third elevating member has a third elevating member. In a state where the lowering of the shaft member is prevented by the engagement between the stopper and the first elevating member, a gripping device is disposed at a position substantially at the same height as the tip of the shaft-shaped component centered by the center member. . Therefore, when the pushing member cannot push the fitting part due to misalignment of the upper end of the inner cylindrical part or the like, the gripping device grips the shaft-like part at a fixed position from the upper end thereof, and the second elevating member Is driven upward, it is possible to lift the shaft-shaped component and the inner cylindrical component fitted to the large-diameter portion of the shaft-shaped component within a range not exceeding the return distance.

For this reason, even if the heights of the shaft-shaped parts and the outer cylinder parts are different from time to time, the centering of the shaft-shaped parts must be adjusted to an assembly height corresponding to the height of the shaft-shaped parts. By positioning the first elevating member, the center member performs centering in a state in which the center member can move upward relative to the first elevating member by the return distance when lifting the shaft-like component by the gripping device, and Regarding the lifting of the shaft part by the device, the difference D in the height dimension between the shaft part and the inner cylinder part
Irrespective of the above, the third elevating member is held at a fixed distance from the first elevating member positioned at the assembling height, so that the shaft-shaped component is always gripped by the gripping device at a fixed position from its tip. As a result, the shaft part and the inner cylinder part are lifted well. Therefore, even when the position to be centered and the position to be gripped are not constant due to different axial dimensions, optimal positioning is performed corresponding to each, and outer cylinder parts, inner cylinder parts, and And all of the shaft parts are well centered such that they are concentric with one another. Then, the pushing member driven downward together with the second elevating member descends to the pushing position in each case regardless of the height dimension difference D between the shaft-shaped component and the inner cylindrical component, and smoothly removes the fitting component. Push down and fit into the cylinder part and the inner cylinder part.

As described above, according to the assembling apparatus of the present invention,
It is possible to satisfactorily and automatically assemble fitting parts correspondingly to parts having a plurality of types of specifications having different axial dimensions.

Further, after the assembling device engages with the upper end portion of the outer cylinder component to position the outer cylinder component, the outer cylinder positioning member is prevented from further descending, and the outer cylinder positioning member And a detecting means for detecting whether or not the relative movement amount between the pushing member and the pushing member has reached a predetermined assembling stroke. Since it is determined whether or not the fitting is in contact with the upper end and the further lowering is impossible, the variation of the height of the upper end of the inner cylinder part and the difference D in the height dimension between the shaft-shaped part and the inner cylinder part are determined. The fitting state of the fitting part can be determined regardless of the above. Therefore, for example, by repeating the lifting operation of the shaft-like component by the gripping device and the pushing operation of the fitting component by the pushing member until the fitting unit detects the fitting state of the fitting component, the non-concentric state is obtained. Even if there are parts, they can be automatically assembled.

Since the assembling stroke is determined based on the difference in height between the outer and inner cylinder parts (dimension E in FIG. 4), the detecting means detects the assembling stroke by ON-OFF. Dimensional difference (E)
Cannot be applied to extremely different parts. However, even in such a case, versatility can be provided within the range of the pressing stroke (dimension F in FIG. 4) of the fitting part with respect to the inner cylinder part.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 2 and FIG. 3 are a front view and a right side view, respectively, showing a main part of a fitting part assembling apparatus according to an embodiment of the present invention. This assembling apparatus is for performing one step when assembling the shock absorber 10 as an assembly whose main part is shown in FIG.

The shock absorber 10 includes an outer cylinder part 12, an inner cylinder part 14, a shaft part 16, and a fitting part 18 shown in FIG. Both the outer cylinder part 12 and the inner cylinder part 14 have a bottomed cylindrical shape.
4 has a smaller axial dimension than the outer cylinder part 16. Inner cylinder part 1
4 is inserted into the cylinder of the outer cylinder part 12 from its bottom side, and is completely accommodated in the outer cylinder part 12 in a swingable state with play in the radial direction. The shaft-shaped part 16 has a substantially cylindrical shape whose axial dimension is longer than the outer cylinder part 12,
One end of the cylindrical shape has a tip portion 20 having the smallest diameter, and the other end has a large-diameter portion 22 that can be fitted into the cylinder of the inner cylinder part 14. When the shaft-shaped part 16 is inserted into the cylinder of the inner cylinder part 14 in a fitted state from the large-diameter part 22 side, most of the shaft-shaped part 16 is accommodated in the inner cylinder part 14,
The distal end portion 20 and the stepped portion 24 near the distal end portion 20 are
2 protrudes outside. In addition, the shaft-shaped part 16
Finally, it should be disposed at the center of the axis of the outer cylinder part 12 and the inner cylinder part 14 so as to be reciprocally movable in the axial direction. A center hole 26 is formed in the end face of the distal end portion 20. The fitting part 18 has a stepped annular shape, and its large diameter part 18a is fitted into the annular space between the outer cylinder part 12 and the shaft part 16, and its small diameter part 18b is It is fitted in an annular space between the inner cylindrical part 14 and the shaft-shaped part 16. Note that a metal member 28 for obtaining a smooth sliding state with the shaft-shaped component 16 is integrally mounted inside the large-diameter portion 18a and the small-diameter portion 18b. The fitting part 18 is the outer cylinder part 12 and the inner cylinder part 1
4. The state where the three parts of the shaft-shaped part 16 are simultaneously fitted and assembled are indicated by a chain line.

The outer cylinder part 12, the inner cylinder part 14, and the shaft part 16 are in the state shown in FIG.
A state in which the inner cylindrical part 14 is immersed therein and the tip end portion 20 of the shaft-like part 16 projects from the outer cylindrical part 12 is pre-assembled as a primary assembling state. Is set in a posture in which the opening is upward and substantially vertical. The assembling apparatus of the present embodiment is arranged above the assembling table 30 and assembles the fitting part 18 to the outer cylinder part 12, the inner cylinder part 14, and the shaft part 16 in the primary assembly state as described above. It is for. Here, the outer cylinder part 12, the inner cylinder part 14, and the shaft part 16 have different axial dimensions depending on the specifications of the shock absorber 10, and the dimensions A, B, and C shown in FIG. In addition to large variations, the dimensions D and E associated therewith are not necessarily the same depending on the specifications, and the assembling apparatus needs to perform an assembling operation corresponding to each of a plurality of types of shock absorbers 10. In the state where the outer cylinder part 12 is arranged at the assembly position, the inner cylinder part 14 is not always located concentrically with the outer cylinder part 12, but in FIG. The case where the part 16 is located substantially concentrically with the outer cylinder part 12 is shown.

Returning to FIG. 2 and FIG. 3, on a positionally fixed support frame 34 disposed above the assembling position, the components constituting the assembling apparatus are suspended from the support frame 34. It is arranged. FIG. 5 is a plan view showing a part of the assembling apparatus in FIG. 3 cut away, and FIG. 6 is a sectional view taken along line VI-VI in FIG. As can be seen from these figures, the first elevating member corresponding to the first
The plate 36 is fixed to the lower ends of a pair of guide rods 38 slidably arranged in the vertical direction with respect to the support frame 34 so as to be vertically movable with respect to the support frame 34. ing. On the other hand, a first air cylinder 40 with a brake is fixed to the support frame 34 with its output rod 42 facing downward, and a second air cylinder 44 is fixed to the first plate 36 with its output rod 46 facing upward. And output rods 42 and 46 facing each other are connected concentrically. Therefore, the first plate 36 is driven in the up and down direction by the operation of the air cylinders 40 and 44 to perform positioning in the up and down direction.

FIG. 7 is an enlarged view of a lower half portion of a main part of the assembling apparatus shown in FIG. The first plate 36 is integrally provided with a cylindrical holder 48 whose axis is aligned with the center axis of the assembling position. The holder 48 has a cylindrical shape inside the cylinder. Center 50 with a conical tip protruding downward
Are arranged. The center 50 descends together with the first plate 36 driven downward, and engages with the center hole 26 of the shaft-like component 16 in the primary assembly state disposed at the assembly position, thereby forming the shaft-like component 16. Perform centering. The center 50 has a large diameter portion 52 at the upper end, and the holder 4
8 is urged downward by a compression coil spring 56 interposed between the abutting member 54 fixedly accommodated in the upper portion of the inside of the holder 8, so that the stepped portion always provided in the cylinder of the holder 48. The large-diameter portion 52 is held at the lower moving end in contact with 58. In other words, the center 50 can be pushed upward by a pushing stroke L from the lower moving end to the contact with the contact member 54.

When the centering of the shaft-like component 16 is performed by the center 50, the first air cylinder 40 projects the output rod 42 in a state where the output rod 46 of the second air cylinder 44 is completely projected in advance. Direction to drive the first plate 36 downward, and the first plate 36
As the center 50 is lowered, the center 50 is engaged with the shaft-shaped component 16 and moves relatively upward with respect to the first plate 36 to reach the upper moving end abutting on the contact member 54, so that The plate 36 is lowered to a position where further lowering of the plate 36 is prevented. FIG. 8 shows the state at this time.
Is shown in the left half. Then, from this state, the second air cylinder 44 operates in the direction in which the output rod 46 is completely retracted, and the first plate 36 is moved by a predetermined return distance M equal to the full stroke inherent to the second air cylinder 44. To raise. The state at this time is shown in the right half of FIG. At this time, the return distance M is set smaller than the pushing stroke L of the center 50, and a gap is formed between the large diameter portion 52 and the step portion 58 by the difference. Therefore, in this state, the center 50 can be pushed upward by the return distance M, and the center 50 corresponds to the height of the shaft-shaped component 16 in a state where the first plate 36 is set on the mounting base 30. It is positioned at the mounting height. In this embodiment, the center 50 corresponds to a center member, and the air cylinders 40 and 44 correspond to a first driving device.

Returning to FIG. 2, a pair of guide rods 60 is disposed on the first plate 36 so as to be slidable in the vertical direction, and a lower end of the guide rod 60 has a second lifting member as a second lifting member. Two plates 62 are attached. The upper end of each of the pair of guide rods 60 is connected to a connecting member 64.
The output rod 68 of the third air cylinder 66 fixedly mounted on the upper portion of the first plate 36 is connected to the connecting member 64. The output rod 68 in FIG. 2 is in a state of being completely protruded. Therefore, the second plate 62 is driven in the vertical direction by the operation of the third air cylinder 66, and the output rod 6 is moved from the state shown in FIG.
Relative movement with respect to the first plate 36 is possible within the range of the stroke N until 8 is completely retracted. Second
At the center of the lower surface of the plate 62, as can be seen from FIG.
A cylindrical pushing member 70 is attached so as to surround the outer peripheral side of the center 50. This pushing member 70
The first plate 36 is positioned at the right half of FIG. 8, that is, the second plate 62 is driven downward after being positioned at the assembling height. The fitting part 18 is brought into contact with the fitting part 18 and pushed down, and the fitting part 18 is fitted to the outer cylinder part 12 and the inner cylinder part 14 and assembled. FIG. 9 shows a state where the fitting part 18 is completely fitted and pushed in. In this case, the pushing position (downward end position) of the second plate 62 in the state where the pushing down of the fitting part 18 is stopped is not constant. That is, since the height B of the inner cylinder part 14 in FIG. 4 differs depending on the specification of the shock absorber 10, the second plate 62
8 is driven downward until further lowering is prevented, for example, by complete fitting. The stroke N is set to a dimension that allows the fitting part 18 to be always completely fitted in consideration of the dimension D in FIG. 4 that differs depending on the type of the shock absorber 10.

Further, a pair of guide rods 72 are disposed on the second plate 62 so as to be slidable in the vertical direction.
An outer cylinder positioning member 74 having a cylindrical shape is attached so as to surround the outer peripheral side of the outer cylinder. The guide rod 72 is shown in FIG.
As can be seen from FIG.
0 and a large-diameter portion 78 is provided at a position above the second plate 62, and is inserted between the large-diameter portion 78 and the block 76. The compression coil spring 80 is urged downward. Therefore, the outer cylinder positioning member 74 can move relative to each other during the stroke P until the outer cylinder positioning member 74 comes into contact with the lower surface of the second plate 62, and the lower moving end shown in FIG. Is held in. In addition, as is clear from the bottom view shown in FIG.
And the outer cylinder positioning member 74 are positioned concentrically with each other. When the second plate 62 is driven downward, the outer cylinder positioning member 74 is engaged with the upper end portion of the outer cylinder component 12 so that the outer cylinder component 12 is substantially vertical on the center axis of the mounting position. Positioning in a different posture. After engaging with the outer cylinder part 12 to prevent further lowering, the second
It can be moved upward relative to the plate 62. The relative movement at this time causes the upper end of the guide rod 72 to protrude upward from the block 76 as shown in FIG.

A sensor 82 is provided on one of the blocks 76 located on the left side in FIG. 7, and a pushing member 70 and an outer cylinder component which are lowered integrally with the second plate 62 from the amount of protrusion of the guide rod 72. After engaging with the fitting 12, the relative movement amount with the outer cylinder positioning member 74, which is prevented from further descending, has reached a predetermined fixed assembling stroke required for assembling the fitting part 18. Is detected. The sensor 82 is XI-XI in FIG.
As shown in FIG. 11, which is a diagram showing a main part of a cross section as viewed,
A proximity switch fixed at a position perpendicular to the axis of the guide rod 72 at a position at a predetermined height from the upper surface of the block 76 comprises a relative movement amount between the pushing member 70 and the outer cylinder positioning member 74. Is switched to ON-OFF when reaches a predetermined fixed assembling stroke.

The distance that the outer cylinder positioning member 74 abuts on the upper end of the outer cylinder part 12 in the state of FIG. 7 and then moves relative to the second plate 62 and the pushing member 70 from the state of FIG. 9 is the dimension of the outer cylinder part 1
4 is determined by the difference between the upper end heights of the inner cylinder part 14 and the inner cylinder part 14, that is, the dimension E in FIG. , pushing amount of time of mating with the inner cylinder part 14 of the fitting part 18, i.e. smaller than the dimension F in FIG. 4, is completely fitted engagement component 18 to the shock absorber 10 to the dimension E is the minimum value E _min The dimension G (= G _min ) in the case of being combined is determined as an assembling stroke, and the arrangement position of the sensor 82 is determined based on the assembling stroke. That is, if the tip of the small diameter portion 18b of the fitting part 18 enters the upper end opening of the inner cylindrical part 14, it can be considered that the fitting part 18 can be pushed in thereafter until it is completely fitted. The assembly stroke can be set with a margin close to the dimension F of the small diameter portion 18b. Thus, even if the dimension E differs depending on the specification, the sensor 82 determines whether the fitting part 18 has been fitted well in the inner cylinder part 14 or whether the fitting part 18 has come into contact with the upper end and cannot be further pushed down.
Is detected by In the present embodiment, the sensor 82 corresponds to a detecting unit.

Returning to FIG. 7, a pair of guide rods 84 are integrally provided on the second plate 62, and a third plate 86 as a third elevating member guided vertically by the guide rods 84 is provided. Are provided so as to be relatively movable with respect to the second plate 62. Third plate 86
As shown in FIG. 10, the pair of guide rods 60
And a compression coil spring 8 inserted between the upper end of the guide rod 84 and the third plate 86 in FIG.
8, and is moved up and down integrally with the second plate 62 while always being held at the lower moving end in contact with the member on the second plate 62 side. As shown in FIG. 2, a pair of guide rods 90 are provided integrally with the third plate 86, and the pair of guide rods 90 penetrate the first plate 36 and have a first plate Each of the stoppers 92 is provided with a stopper 92 that engages with the corresponding one of the stoppers 36. For this reason, the third plate 68 is configured such that the dimension Q between the stopper 92 and the upper contact surface of the first plate 36 is the maximum allowable stroke (separation stroke) and the third plate 68
It is possible to move relative to the plate 36 downward. Here, since the second plate 62 can move relative to the first plate 36 by the stroke N larger than the dimension Q, when the second plate 62 descends beyond the dimension Q, the third plate The plate 86 is held at a predetermined separation position with respect to the first plate 36 by the engagement of the stopper 92, and moves upward relative to the second plate 62 after further lowering is prevented. Become. In the state of FIG. 9, the third plate 86 has moved upward by the dimension H relative to the second plate 62, and the second plate 62 has the dimension Q and the dimension H.
Is relatively lowered with respect to the first plate 36 by the amount added.

As can be seen from FIG. 3, the third plate 86 has a portion located behind the center 50.
A gripping device 94 capable of gripping the distal end portion 20 of the shaft-shaped component 16 at an appropriate position is provided, and can be vertically moved integrally with the third plate 86. The gripping device 94 includes a pair of gripping arms 96 and 98, a cam 100, a fourth air cylinder 102, and the like. The first plate 36 is positioned at the assembly height, and the third plate 86 is 1 plate 3
In a state where the pair of gripping arms 96 and 98 are held at a position separated from the second arm 6, the pair of gripping arms 96 and 98 are attached to the third plate 86 so as to coincide with the height of the distal end portion 20 of the shaft-shaped component 16. As shown in a bottom view from below with the second plate 62 etc. removed, a pair of gripping arms 96 and 98 are rotatably supported around a pair of pins 104 parallel to the axis of the center 50. Have been. Each of the gripping arms 96 and 98 has a pad 106 on one end side near the axis of the center 50 and a cam roller 108 on the other end side.
Each cam roller 108 is urged by a tension coil spring 110 extending between the pins 6 and 98 on the cam roller 108 side of the pin 104 so as to always contact the cam 100. Therefore, the grip arms 96 and 98 are rotated according to the movement of the cam 100. The state shown in the left half of FIG.
Are located at the separated release position, and the state shown in the right half is a state where the pad 106 is approached and is located at a gripping position for gripping the distal end portion 20 of the shaft-shaped component 16. The dashed line shown in FIG. 12 indicates a concave shape formed on the upper surface of the second plate 62 in order to avoid interference with one end of the gripping arms 96 and 98.

In FIG. 13 showing a view in the direction of XIII in FIG. 3, the cam 100 has a tapered portion 114 which expands upward continuously to the cylindrical portion 112 on the lower end side, and a guide rod portion 116 on the upper portion. have. The guide rod portion 116 is connected to the distal end of the output rod 120 of the fourth air cylinder 102 in a state of being slidably guided in the vertical direction within the cylinder of the frame 118. In a state where the fourth air cylinder 102 retracts the cam 100 as shown in the left half of the drawing, a pair of cam rollers 108 come into contact with the cylindrical portion 112 so that they come close to each other, and the grip arms 96 and 98
Is in the released state (see the left half of FIG. 12), but as shown in the right half of the figure, the fourth air cylinder 102
00, the pair of cam rollers 1
08 is brought into contact with the large diameter portion of the tapered portion 114 so that they are separated from each other, so that the gripping arms 96 and 98 are in the gripping state (see the right half in FIG. 12).

On the other hand, a temporary centering device 122 shown in FIG. 14 and FIG. 15, which is a cross-sectional view taken along the line XV-XV in FIG. 14, is provided between the mounting device and the mounting table 30. . The temporary centering device 122 includes a base 124 supported by a support frame (not shown) so as to be vertically movable.
And is provided above the mounting base 30 via. The base 124 is manually or automatically positioned in advance in the vertical direction corresponding to the height position of a relatively large diameter portion below the stepped portion 24 of the shaft-shaped component 16. I have. A slide plate 128 is attached to the base 124 via a guide rail 126 so as to be movable in a straight line direction, that is, a vertical direction in FIG. A first block 132 is fixed on the slide plate 128, and a rod 130 is provided in the first block 132.
Are fitted so as to be relatively movable in the axial direction. The rod 130 having the large-diameter portion 140 at one end is connected to the output rod of the fifth air cylinder 134 having the other end fixed on the base 124 via a connecting member 136, and is reciprocated in the straight line direction. It has become. A compression coil spring 138 is interposed between the first block 132 and the connecting member 136, and the first block 132 is urged in a direction away from the connecting member 136. Therefore, the slide plate 128 is reciprocated in the linear direction together with the rod 130 by the fifth air cylinder 134 while the first block 132 is always kept in a state in which the first block 132 is in contact with the large diameter portion 140 of the rod 130. Further, a stopper pin 142 is fixed to the slide plate 128, and the stopper pin 142 is brought into contact with a stopper block 144 fixed on the base 124, so that the slide plate 128
4 is prevented from moving forward beyond a certain distance, and after abutment thereof, only the rod 130 is advanced against the urging force of the compression coil spring 138. A dashed line in FIG. 14 shows a state where the slide plate 128 has been advanced to the advanced end position.

A second block 148 holding a pair of gripping claws 146 so as to be rotatable about a vertical rotation axis is fixed to the tip of the slide plate 128. The pair of gripping claws 146 are configured such that the pinion 150 meshed with each other is attached to a base end thereof and rotated so that they can be opened and closed, and one of the pinions 150 has the rod 130 The rack 152 integrally fixed to the large-diameter portion 140 is engaged with the rack 152 while being backed up by the backup roll 154. Therefore, slide plate 1
When the rod 130 is advanced further to the forward end position and the rod 130 is further advanced while compressing and compressing the compression coil spring 138, the pair of gripping claws 146 are closed and rotated so as to approach each other, and the assembling table 30 is rotated. The shaft-like component 16 set above in the primary assembly state is gripped by the V-shaped gripping surface 156 that expands in the closing rotation direction. The gripping center at this time is set so as to substantially coincide with the central axis of the assembling position, and the accuracy of the temporary centering is set to such an extent that the center 50 can be securely engaged with the center hole 26 of the shaft-shaped component 16. Is secured. Further, the gripping surface 156 is formed so as to be able to grip the shaft-shaped component 16 well even when the upper end of the shaft-shaped component 16 is most misaligned in the outer cylindrical component 12, and interferes with each other. A notch 158 is provided so as not to do so. FIG. 16 shows a state where the shaft-like component 16 is gripped by the pair of gripping claws 146.

Next, an assembling process by the assembling apparatus of the present embodiment will be described.

First, the shaft part 16 and the inner cylinder part 14 fitted to each other via the large diameter part 22 are inserted inside, and the outer cylinder part 12 in the primary assembly state is fixed to the assembly base 30. It is set on the tool 32 as shown in FIG. 4 by a manual operation of an operator or by a carry-in device or the like. In this case, the outer cylindrical part 12 is fitted into the jig 32 and is arranged in a substantially vertical posture at the mounting position on the mounting base 30, and the inner cylindrical part 14 to which the shaft-like part 16 is mounted is removed. It may be inserted into the cylinder of the outer cylinder part 12 so as to be substantially concentric, and may be in a primary assembled state. Next, the base 12 corresponds to the height position of a relatively large diameter portion below the stepped portion 24 of the shaft-shaped component 16.
The vertical position of 4 is adjusted to match the holding height position of the temporary centering device 122. When a start switch (not shown) is turned on in this state, the fifth air cylinder 134 of the temporary centering device 122 is operated, and the slide plate 1
28 is moved to the forward end position, the pair of gripping claws 146 are closed and rotated, and the upper portion of the shaft-like component 16 is held on the substantially central axis at the assembly position. A fitting part 18 is supplied from above the shaft-like part 16. FIG. 17 is a view showing this state. Since the upper part of the shaft-shaped part 16 is positioned by the temporary centering device 122, the fitting part 18 has the stepped part 24 and the slightly larger diameter part thereunder. (A portion having a fitting diameter). The pair of gripping claws 14
An arc-shaped notch 160 is formed on the upper surface of 6 in order to avoid interference with the fitting part 18.

Subsequently, from the initial state in which the output rod 46 of the second air cylinder 44 is previously positioned at the projecting position, the first air cylinder 40 is operated in the direction in which the output rod 42 projects, and the first plate 36 is moved downward. Is driven. The center 50, the second plate 62, and the third plate 86 descend together with the first plate 36 in the state shown in FIG. While being engaged with the center hole 26 and thereafter compressing the compression coil spring 56, the inside of the holder 48 is relatively moved upward and reaches the upper moving end which comes into contact with the contact member 54. As a result, the first
Further lowering of the plate 36 is prevented, and the entire plate stops (the left half state in FIG. 8). In this state, the brake for fixing the position of the output rod 42 with respect to the main body of the first air cylinder 40 is operated, whereby the position of the output rod 46 of the second air cylinder 44 connected to the output rod 42 is fixed. You. Next, from that state,
The air cylinder 44 is operated in a direction to retract the output rod 46, and the first plate 36, to which the main body of the second air cylinder 44 is fixed, is moved to a predetermined return distance M.
When the center 50 is raised, the center 50 is relatively lowered in the holder 48 while being pressed against the shaft-like component 16 by the urging force of the compression coil spring 56, and the center 50 is positioned between the large-diameter portion 52 and the stepped portion 58. A gap corresponding to the depressed stroke L of 50 is subtracted from the return distance M (right half of FIG. 8), and the first plate 36 is assembled according to the height of the shaft-shaped component 16. Positioned at height. Then, the temporary centering device 122 that has positioned the shaft-like component 16 is operated in the direction in which the fifth air cylinder 134 pulls in the output shaft, the pair of gripping claws 146 are opened and rotated, and are retracted. It is retracted to a position that does not interfere with the cylinder positioning member 74 or the like. At the same time when the gripping by the gripping claws 146 is released, the shaft-shaped component 16 is released.
Is centered by the center 50 substantially concentrically with the outer cylinder part 12.

Then, the third air cylinder 66 is operated in the direction in which the output rod 68 is pulled in, and the second plate 6
2 is driven downward, and the pushing member 70
The fitting part 18 previously fitted to the shaft part 16
And the fitting part 18 is pushed down, and the outer cylinder positioning member 74 is engaged with the upper end of the outer cylinder part 12 to more accurately position the outer cylinder part 12 at the center of the assembling position. While the second plate 62 is descending, the descending distance is equal to the first plate 36 and the third plate 8.
When the third plate 86 reaches the separation stroke Q with respect to the second plate 62, the third plate 86 is further prevented from descending and relatively moved with respect to the second plate 62, so that the gripping position of the gripping device 94 is changed to the distal end 20 Is held in a state that matches the height position of Further, the outer cylinder positioning member 74, whose further lowering is prevented by engagement with the outer cylinder component 12, moves relatively upward with respect to the second plate 62 against the urging force of the compression coil spring 80. . When the shaft component 16 and the inner cylinder component 14 are held substantially vertically on the center axis of the assembly position after the fitting component 18 is pushed down into the outer cylinder component 12 by the pushing member 70, in other words, , Inner cylinder parts 14
Is inserted into the outer cylinder part 12 so that the bottom thereof is
2 is relatively concentric with high accuracy, the fitting part 18 is smoothly pushed in by the pushing member 70 without interfering with the upper end of the inner cylinder part 14.

Here, the tip of the small-diameter portion 18b of the fitting part 18 enters the upper end opening of the inner cylindrical part 14, and the fitting part 1
When the second plate 62 is completely fitted to the outer cylinder part 12 and the inner cylinder part 14 (the state shown in FIG. 9), the second plate 62 is prevented from further descending and stops. 14. After the guide rod 72 has been inserted into the upper end opening of the casing 14 and before it is completely fitted, the relative displacement between the pushing member 70 and the outer cylinder positioning member 74 has exceeded a predetermined assembling stroke. In other words, fitting part 1
The sensor 82 detects that the connector 8 has been properly fitted and assembled. The lowering of the second plate 62 stops and the sensor 8
When the fitting state of the fitting part 18 is detected by 2, the third air cylinder 66 is operated in the direction in which the output rod 68 is protruded, and the second plate 62 is driven upward, and the second plate 62 is moved upward. At the same time, the pushing member 70 rises, and the outer cylinder positioning member 74 and the third plate 86 also rise integrally from the middle. Then, the second plate 62 and the third plate 86 are connected to the first plate 36.
When the state returns to the initial position shown in FIG. 7 again, the brake of the first air cylinder 40 is released, and then the first air cylinder 40 is retracted and the second air cylinder 44 is projected and operated. Then, the first plate 36 is returned to the initial state.

On the other hand, if the position when the inner cylinder part 14 is inserted into the outer cylinder part 12 is relatively displaced from the axis of the outer cylinder part 12, that is, the center of the assembling position, the center 50 causes Even if the distal end portion 20 of the component 16 is positioned concentrically with the outer cylinder component 12, the inner cylinder component 14 and the axial component 1
Since the lower end of the inner cylindrical part 14 is still deviated from the axis of the outer cylindrical part 12, the fitting part 18 contacts the upper end of the inner cylindrical part 14 during the pushing process by the pushing member 70, as shown in FIG. It cannot touch it anymore.
In such a state, the sensor 82 does not detect that the relative movement amount between the pushing member 70 and the outer cylinder positioning member 74 exceeds a predetermined assembling stroke, and the fitting part 18 Since the state in which the fitting is not possible in the component 14 is detected, the pushing operation by the pushing member 70 is stopped, and the centering operation by the gripping device 94 is performed.

As described above, in the state where the second plate 62 is lowered until the pushing member 70 starts to push down the fitting part 18, the gripping position of the gripping device 94 is the same as that of the distal end portion 20 of the shaft-like component 16. When the fourth air cylinder 102 is actuated in the direction in which the output rod 120 is protruded at the stage where the fitting part 18 cannot be fitted since the fitting position 18 is matched with the height position, the fourth air cylinder 102 engages with the cam 100. The cam rollers 108 are separated from each other so that
And 98 are driven to the gripping position, and the distal end portion 20 of the shaft-like component 16 is gripped by the gripping device 94. continue,
When the third air cylinder 66 is operated in the direction in which the output rod 68 protrudes, and the second plate 62 and the third plate 86 are driven upward, the shaft-like component 16 is raised together with the third plate 86 and lifted. The shaft part 16 and the inner cylindrical part 14 fitted to the large diameter part 22 of the shaft part 16 are suspended vertically by its own weight. Second
The plate 62 has a center 5 that rises with the shaft-shaped part 16.
0 moves upward in the holder 48 by the return distance M against the urging force of the compression coil spring 56, and
Abuts against the abutment member 54 and rises and stops until the shaft-like component 16 and the gripping device 94 are further prevented from rising. FIG. 1 is a diagram showing the state at this time. In this case, the shaft-like component 16 held by the holding device 94 is
Is located on the center axis of the assembling position by the center 50, so that the shaft-shaped part 16 and the inner cylindrical part 14 are concentric with the center 50 and further the outer cylindrical part 12 over the entire length thereof. It is centered. Further, the fitting part 18 is positioned inside the cylinder of the outer cylinder positioning member 74, and unnecessary swinging of the shaft-shaped component 16 is suppressed by the outer cylinder positioning member 74, and the centering thereof is quickly performed. It will be.

In the state shown in FIG. 1, the center 50 engaged with the center hole 26 of the shaft-like part 16 is moved by the first plate 36 by the first air cylinder 40 and the second air cylinder 44 in advance. At the time of positioning at the assembly height corresponding to the height of the shaft absorber 16, the height of the shaft-shaped part 16 is reduced due to the difference in the specifications of the shock absorber 10. Even in a different case, the shaft-shaped component 16 can be moved upward relative to the holder 48 as the shaft-shaped component 16 is lifted up. Further, the third plate 86 is held at a predetermined separation position with respect to the first plate 36 positioned at the assembly height by the engagement between the first plate 36 and the stopper 92, so that the holding position of the holding device 94 is maintained. Is adjusted to a fixed position with respect to the distal end portion 20 of the shaft-shaped part 16, so that an appropriate gripping state can always be obtained regardless of the variation in the difference between the height of the shaft-shaped part 16 and the height of the inner cylindrical part 14. . The inner cylindrical part 14 is not always raised integrally with the shaft part 16 depending on the degree of fitting of the shaft part 16 to the large diameter part 22. At least temporarily or momentarily, it is lifted together with the shaft-shaped component 16 by the resistance and is centered concentrically with the outer cylinder component 12. The inner cylinder part 14 indicated by a dashed line in FIG. 1 has been once lifted and then dropped.

Thereafter, the second plate 62 is again driven downward by the third air cylinder 66, and the pushing member 70
Inner part 14 in which the fitting part 18 is well centered
It is fitted inside and pushed completely. In this case,
If the fitting part 18 again interferes with the upper end of the inner cylinder part 14 even when the shaft part 16 is suspended and centered, the suspension operation of the shaft part 16 is repeated in the same manner as described above. . Then, when the fitting part 18 is completely fitted into the inner cylinder part 14, the holding arms 96 and 9 of the holding device 94 are held.
8 is released, the second plate 62 and the third plate 86 are returned to the initial state with respect to the first plate 36 as described above, and the first plate 36 is returned to the initial state. Complete.

As described above, according to the assembling apparatus of the present embodiment, even if the heights of the shaft-shaped part 16 and the outer cylindrical part 12 are different depending on a plurality of types of specifications of the shock absorber 10,
As for the centering of the shaft-like component 16, the center 50 is lifted by the gripping device 94 by positioning the first plate 36 at an assembly height corresponding to the height of the shaft-like component 16. At this time, the centering is performed in a state in which the relative movement to the first plate 36 for the return distance M can be performed upward, while the lifting of the shaft-like component 16 by the gripping device 94 is performed by using the shaft-like component 16 and the inner cylindrical component 14. Third plate 86 regardless of the height difference (dimension D in FIG. 4)
Is held at a fixed distance from the first plate 36 positioned at the assembly height, so that the shaft-like component 16
Is always gripped by the gripping device 94 at a fixed position in the distal end portion 20, and the shaft-shaped part 16 and the inner cylindrical part 14 are lifted well. For this reason, even when the height position to be centered or the height position to be gripped is not constant due to different axial dimensions, optimal positioning is performed corresponding to each position, and outer cylinder parts in multiple types of specifications All cases of 12, inner cylinder part 14 and shaft part 16 are well centered so that they are concentric with each other. Then, the pushing member 70 driven downward together with the second plate 62 descends to the pushing position in each of the shaft components 16 and the inner cylindrical component 14 irrespective of the difference in height D between the components, and the fitting component. 18 smooth outer cylinder parts 12
It is pushed down and fitted into the inner and inner tube parts 14. Accordingly, the fitting part 18 that is simultaneously fitted to the outer cylinder part 12, the inner cylinder part 14, and the shaft part 16 is automatically set corresponding to each of a plurality of kinds of specifications having different axial dimensions. It becomes possible to assemble.

Further, the assembling apparatus of the present embodiment includes
8, a sensor for detecting whether or not the relative movement amount between the outer cylinder positioning member 74 and the pressing member 70 has reached a fixed assembling stroke. 82, it is determined whether the fitting part 18 has been fitted well in the inner cylinder part 14 or whether the fitting part 18 has come into contact with the upper end to make it impossible to further depress it. The fitting state of the fitting part 18 can be determined irrespective of the difference D in the height dimension from the inner cylinder part 14. Therefore, until the sensor 82 detects that the fitting of the fitting part 18 is completed,
Operation of the shaft-like part 16 by the force and the pushing member 7
By repeating the pushing operation of the fitting component 18 by 0, it is possible to reliably and automatically assemble the non-concentric components. Further, the variation that varies depending on the specification of the dimension E in FIG.
Since the sensor 82 is provided in correspondence with the assembling stroke determined based on the minimum value of the dimension E and smaller than the indentation dimension F at the time of fitting to 4, the dimension E differs depending on the specification. There is an advantage that the fitting state of the fitting part 18 is reliably detected by the sensor 82.

While the embodiment of the present invention has been described in detail with reference to the drawings, the present invention can be embodied in other forms.

For example, in the above-described embodiment, the assembling device of the shock absorber 10 has been described. However, the one having the outer cylinder part and the inner cylinder part whose both ends are open,
The present invention can be similarly applied to an assembling apparatus of various other assemblies, such as an apparatus having a fitting part having an annular fitting part fitted between the outer cylinder part 4 and the outer cylinder part 12. .

In the above embodiment, the center 5
Although the compression coil spring 56 is used as the urging means for urging 0 downward, the urging means may be constituted by air pressure, hydraulic pressure, or weight.

In the above-described embodiment, the center 50 as the center member is engaged with the center hole 26 of the shaft-like component 16 so as to be centered. When the portion 20 has a small diameter, a center member that is engaged with the outer periphery and performs centering may be used.

In the above-described embodiment, the first air cylinder 40 and the second air cylinder 40, which share the lowering and raising operations when positioning the first plate 36 at the assembling height, are used.
Although the two driving devices with the air cylinder 44 are combined to function as the first driving device, a single driving device that performs two operations of lowering and raising may be used.

In the above-described embodiment, the first air cylinder 40 and the second air cylinder 44 are used as the first driving device, and the third air cylinder 66 is used as the second driving device. Other driving devices such as those using an actuator, a motor and a feed screw may be used instead. The same applies to the fourth air cylinder 102 and the fifth air cylinder 134.

In the above-described embodiment, the pushing member 70 is fixed to the second plate 62. However, when the fitting part 18 and the inner cylindrical part 14 interfere with each other, malfunction or damage is not caused. Alternatively, it may be disposed on the second plate 62 so as to be relatively movable upward through a buffer member such as a spring. In this case, the fitting state of the fitting part 18 can be detected from the relative movement amount between the pushing member 70 and the outer cylinder positioning member 74 by providing a sensor 82 on a member that moves together with the pushing member 70. .

Further, the pushing member 7 in the above-described embodiment is used.
The zero and outer cylinder positioning member 74 has a cylindrical shape, but may be constituted by a plurality of members arranged concentrically with the center 50.

In the above-described embodiment, the stopper 92 is provided on the guide rod 90 disposed between the first plate 36 and the third plate 86. It is also possible to regulate the distance between the first plate 36 and the third plate 86 by a certain length of wire disposed between them, and a stopper that functions similarly in various forms can be configured.

In the above-described embodiment, the compression coil spring 88 is used as the urging means for urging the third plate 86 downward. However, the urging means is constituted by air pressure, hydraulic pressure, or weight. May be.

In the above-described embodiment, the third air cylinder 66 raises the center 50 until the center 50 contacts the contact member 54 in a state where the gripping device 94 grips the shaft-shaped component 16. However, even if it is configured to be stopped at a rise smaller than the return distance M, as long as the shaft-shaped component 16 can be suspended, there is no problem.

In the above-described embodiment, the compression coil spring 80 is used as the urging means for urging the outer cylinder positioning member 74 downward.
Alternatively, the biasing means may be constituted by a weight.

In the above-described embodiment, the sensor 8
2, the relative movement amount between the pushing member 70 and the outer cylinder positioning member 74 is determined based on the protrusion size of the guide rod 72 from the block 76.
Member moving with plate 62 and outer cylinder positioning member 7
Various types of sensors and the like can be used as the detecting means as long as the sensors are disposed between the member and the member that moves together with the member. For example, when a distance sensor such as a magnescale is employed as a detecting means, the assembling strokes are stored in a computer or the like in advance in correspondence with the plurality of types of shock absorbers 10 having the different dimensions E, and
By inputting the type of the shock absorber 10 supplied for assembling into a computer or the like, it becomes possible to cope with a device having a greatly different dimension E.

In the above-described embodiment, the center 50 is engaged with the shaft-shaped component 16 while the shaft-shaped component 16 is held by the temporary centering device 122. The fitting component 18 may be fitted to the shaft-like component 16 by a device for supplying the component 18 and may be provisionally centered. When the range of misalignment of the shaft-like component 16 is small, the temporary centering device 122 and the like are not necessarily required.

In the above-described embodiment, the jig 32
The outer cylinder part 12 is positioned on the center axis of the assembling position by the and the outer cylinder positioning member 74. For example, the outer cylinder part 12 A mechanism for positioning the intermediate portion may be added.

Although not specifically exemplified, the present invention can be implemented in various modified and improved modes based on the knowledge of those skilled in the art.

[Brief description of the drawings]

FIG. 1 is a front view showing a centering state by hanging a shaft part 16 and an inner cylindrical part 14 in the assembling apparatus of FIG. 3;

FIG. 2 is a front view showing a main part of the assembling apparatus of FIG. 3;

FIG. 3 is a right side view of the fitting device assembling apparatus according to the embodiment of the present invention;

FIG. 4 is a diagram illustrating a configuration of an assembly in which fitting parts are assembled by the assembling apparatus of FIG. 3;

FIG. 5 is a plan view showing a part of the assembling device in FIG. 3 with a cutout;

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is an enlarged front view of a main part of the assembling apparatus of FIG. 3 with a part cut away;

FIG. 8 is a diagram illustrating a positioning state of a first lifting member by a first driving device.

FIG. 9 is a front view showing a state in which pushing of a fitting part is completed in the assembling apparatus of FIG. 3;

FIG. 10 is a bottom view showing a main part of the assembling device of FIG. 3;

11 is a sectional view taken along line XI-XI in FIG. 7;

FIG. 12 is a bottom view of the assembling apparatus of FIG.

FIG. 13 is a view as seen from the arrow XIII in FIG. 3;

FIG. 14 is a plan view showing a part of the temporary centering device in the assembling device of FIG.

FIG. 15 is a sectional view taken along the line XV-XV in FIG. 14;

FIG. 16 is a diagram showing a state in which the device of FIG. 14 has gripped a shaft-shaped component.

FIG. 17 is a view showing a state in which a fitting part is supplied to a temporarily centered shaft-like part in the assembling apparatus of FIG. 3;

18 is a view showing a state in which the fitting part interferes with the inner cylinder part in the process of pushing the fitting part by the assembling apparatus of FIG. 3;

[Explanation of symbols]

 10: Shock absorber (assembly) 12: Outer cylinder part 14: Inner cylinder part 16: Shaft part 18: Fitting part 20: Tip part 22: Large diameter part 36: First plate (first elevating member) 40: First air cylinder (first driving device) 44: Second air cylinder (first driving device) 50: Center (center member) 62: Second plate (second lifting member) 66: Third air cylinder (second driving device) Device) 70: pushing member 74: outer cylinder positioning member 82: sensor (detecting means) 86: third plate (third lifting member) 92: stopper 94: gripping device

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-224931 (JP, A) JP-A-2-224932 (JP, A) JP-A-6-166671 (JP, U) JP-A-3-21631 96136 (JP, U) Japanese Utility Model 2-100747 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) B23P 19/02 B23P 21/00 303

Claims (2)

(57) [Claims] An outer cylinder part having a cylindrical shape, an inner cylinder part having an axial dimension shorter than the outer cylinder part and being accommodated in the outer cylinder part, and an axial dimension having the axial dimension being shorter than the outer cylinder part. A shaft-shaped part provided in a part of a cylindrical shape longer than the outer cylinder part and having a large-diameter portion fitted into the cylinder of the inner cylinder part and disposed at the center of the axis of the outer cylinder part and the inner cylinder part; Each of the shaft part, the outer cylinder part, and the inner cylinder part in the cylinder of the outer cylinder part such that the shaft part, the outer cylinder part, and the inner cylinder part are concentric with each other.
And a stepped annular fitting part which is fitted to each other, wherein the inner cylindrical part is immersed in the outer cylindrical part and the cylindrical tip of the shaft-like part is separated from the outer cylindrical part. A device for assembling the fitting parts to them after they are assembled to each other in a primary assembly state in which the parts protrude, wherein the outer cylinder part, the inner cylinder part, and the shaft in the primary assembly state A first elevating member disposed movably in the up-down direction above an assembling position where the component is arranged in a substantially vertical posture; and It is disposed so as to be able to be pushed upward by a predetermined constant pushing stroke on the center axis, and is always urged downward and held at the lower moving end, and the first elevating member moves downward. When driven, the tip of the shaft-shaped part A center member for centering the shaft-like component by engaging with the shaft member; and driving the first elevating member downward, so that the center member engages with the shaft-like component as the first elevating member lowers. While being moved upward relative to the first elevating member and reaching the upper moving end, the first elevating member is lowered to a position where further lowering is prevented,
From this state, the first elevating member is driven upward to raise the first elevating member by a predetermined constant return distance smaller than the pushing stroke of the center member, and the first elevating member is adjusted to the height dimension of the shaft-shaped part. A first driving device that is positioned at a corresponding assembling height, a second lifting member that is provided on the first lifting member so as to be relatively movable in the vertical direction and is driven in the vertical direction by a second driving device; The second elevating member is provided on the second elevating member, and the second elevating member is driven downward in a state where the first elevating member is positioned at the assembling height. A pushing member which abuts on the fitting component to push down the fitting component, fits the fitting component into the outer cylinder component and the inner cylinder component and assembles the same, and a relative movement in the vertical direction to the second elevating member. When it is provided as possible In addition, while being constantly urged downward and moved up and down together with the second elevating member while being held at the lower moving end, only a predetermined separation stroke with respect to the first elevating member A stopper that engages with the first elevating member at the lowered separated position, and further lowers the second elevating member when the second elevating member is further driven downward in a state where further lowering is prevented by the engagement; A third elevating member that is relatively moved with respect to the center member in a state where the first elevating member is positioned at the assembly height and the third elevating member is held at the separated position by the stopper. The third elevating member is disposed on the third elevating member so as to be located at substantially the same height as the tip of the shaft-like component centered by, and grips the tip of the shaft-like component on the central axis at the assembly position. And the second The third elevating member is raised as the descending member is driven upward to ascend, so that the center member is pushed upward and fits into the shaft-shaped component and the large-diameter portion of the shaft-shaped component. A holding device for lifting and suspending the combined inner cylinder component within a range not exceeding the return distance. 2. The second lifting member is provided so as to be vertically movable relative to each other, and is always urged downward to be held at a lower moving end, whereby the second lifting member is driven downward. Thereby, while engaging with the upper end of the outer cylinder part and positioning the outer cylinder part in a substantially vertical posture on the center axis of the assembling position, after engaging with the outer cylinder part, An outer cylinder positioning member that prevents the above descent, and whether a relative movement amount between the outer cylinder positioning member and the pushing member has reached a predetermined assembly stroke required for assembling the fitting part. The assembly device for fitting parts according to claim 1, further comprising: a detection unit configured to detect whether or not the fitting part is included.