JPH03204128A - Automatic tool changing mechanism for muffler seaming device - Google Patents

Abstract

PURPOSE:To automate and simplify tool change and to increase the efficiency by operating each operating means such as an operating means for a muffler seaming member or an operating means for a moving base at a suitable timing. CONSTITUTION:Each muffler seaming device 24 is advanced, a tool supporting base is moved toward the device 24 and an adapter 56 for the tool 58 is fitted into a fitting hole. A cylinder 51 is operated to close a collet chuck 48, the tool 58 is fixed to the side of the muffler seaming device 24 and the tool supporting base is lowered to remove the engagement with tool 58. Then, 1st and 2nd cylinders are operated to move the moving base as far as a tool stand by position to return a rocking axis 70, a rocking bracket 80, a seaming arm 22 and a cam follower 20 is fitted from the front into a cam groove 18 to be put in a usable state. In this way, tool 58 change can be performed automati cally and easily.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mechanism for automatically replacing a tool in a muffler tightening device that automatically tightens the peripheral edge of a muffler of an automobile or the like.

[Conventional technology]

In general, mufflers used in automobiles etc. are shown in Figure 16 (
As shown in (a) and (b), it consists of a cylindrical cell 11 and end plates 12 that are side plates, and as shown in FIGS. 17 and 18, both ends of the cell 11 and the end The peripheral edge of the plate 12 is wound outward, so that the entire plate 12 is integrally molded.

As an automatic tightening device for such a muffler 10, the 19th
There is something like the one shown in the figure. In this device, a receiving mold 14 into which the end of the muffler is attached, and a cam (guiding member) 16 having a groove shaped to follow the cross-sectional shape of the muffler are integrally constructed, and the groove 18 of the cam 16 is The fitted cam follower (guided member) 20 and seaming roller (muffler seaming part) 22 are attached to the same muffler seaming member (not shown), and this muffler seaming member is swingably attached to the main body of the device. It is being Then, with the cam follower 20 guided by the cam 16 and the seaming roller 22 pressed against the peripheral edge of the muffler, the receiving die 14 and the cam 16 rotate together. According to this device, the seaming roller 22 is attached to the peripheral edge of the muffler 10 by rotating the muffler 10 and the cam 16 together while sandwiching the peripheral edge of the muffler 10 between the seaming roller 22 and the receiving mold 14. The muffler 10 is sequentially tightened while rocking.

[Problem to be solved by the invention]

In the above device, if the cross-sectional shape of the muffler 10 to be tightened changes, the receiving mold 14 and cam 16 of the device must also be replaced with ones having shapes corresponding to the above-mentioned cross-sectional shape. However, in the conventional apparatus, the replacement of the receiving mold 14 and the cam 16 is performed manually, which has the disadvantage of requiring a long time to perform the work.

In view of these circumstances, the present invention provides a mechanism that can significantly shorten the working time by automatically replacing guide members such as muffler molds and cams in the main body of the muffler tightening device. The purpose is to provide

[Means to solve the problem]

The present invention provides a receiving mold to which a muffler end is attached, a guide member having a guide portion having a shape that follows the cross-sectional shape of the muffler,
a muffler tightening member that is movably attached to the device main body and has a guided portion that is engaged with the guide portion of the guide member and a muffler tightening portion that is pressed against the peripheral edge of the muffler; A muffler tightening device that sequentially tightens the muffler circumference by rotating the receiving mold and guide member together while sandwiching the muffler circumferential edge between the muffler tightening part and the receiving die while being guided by a cam. , a mechanism for automatically exchanging the tool consisting of the receiving die and the guide member with respect to the apparatus main body, the tool being configured to be insertable and removable in the axial direction of the muffler with respect to the apparatus main body, and the guided a tool attachment/detachment mechanism configured to be capable of being inserted into and removed from the guide portion of the guide member in the axial direction of the muffler, and capable of switching between a state in which the tool is fixed to the device main body side and a state in which it is released; muffler tightening member actuating means for moving the muffler tightening member between a position where the guided portion thereof is fitted into the guide member and a position where it is removed from the guide member while the muffler tightening member is attached to the device main body; A plurality of tool supports are provided to be movable up and down and movable in the axial direction of the muffler, and the tool support stands move between the tool exchange position where each tool support stand is located below the tool and the tool standby position where each tool support stand is away from the tool. It is equipped with a movable platform that moves, a movable platform operating means that drives this moving platform, and a tool supporting platform operating means that operates each tool supporting platform, and when the tool supporting platforms are raised, the above-mentioned It is configured so that a tool can be engaged with it (claim 1).

Furthermore, it is more effective if gas supply means is provided for supplying cleaning gas to a portion of the muffler tightening device main body into which the tool is inserted and removed (Claim 2).

[For production]

According to the above configuration, tools can be automatically replaced, for example, in the following manner.

First, the muffler tightening member operating means moves the muffler tightening member to a position where the guided portion of the muffler tightening member is removed from the guide portion of the guide member. On the other hand, in the moving table, after a replacement tool is engaged with some of the tool supports, other tool supports that are not engaged are brought under the tool attached to the muffler tightening device. Move the moving platform to the desired position. Then, raise this tool support stand, and
After engaging the tool mounted on the device main body, the tool attachment/detachment mechanism is switched to the released state, and the tool and the tool support are moved together in a direction away from the device main body. This results in
The tool can be pulled out from the main body of the device.

Next, the moving table is moved to a position where the replacement tool engaged with another tool support corresponds to the attachment part of the device main body, and in this state, the tool support is moved in the same direction as approaching the device main body. By moving the tool support stand, a replacement tool is inserted into the main body of the device.

After switching the tool attaching/detaching mechanism from the released state to the fixed state, the tool is disengaged from the tool support, the tool support is lowered, and the movable base is moved to the tool standby position. Further, by moving the muffler tightening member using the muffler tightening member actuating means and fitting the guided portion into the guide portion of a new tool, the main body of the apparatus becomes ready for use.

Furthermore, according to the apparatus according to claim 2, the tool and the portion where the tool is inserted and removed are cleaned by the gas supplied from the gas supply means.

〔Example〕

An embodiment of the present invention will be described based on FIGS. 1 to 15.

FIGS. 14 and 15 show an example of a muffler tightening system equipped with the mechanism of the present invention. In the figure, a pair of muffler tightening bags [24] are installed at opposite positions, and between these muffler tightening devices 24, a muffler loading device 26, a muffler unloading device 28, and a moving stage for transporting tools are installed. 30 is installed so as to be movable in a direction perpendicular to the axial direction of the muffler 10 (in the vertical direction in FIG. 14; hereinafter referred to as the Y direction). In addition, a control panel 32 for controlling the drive of each muffler tightening device 24 is located near each muffler tightening device 24.
is installed.

1 to 4 show the detailed structure of the muffler tightening device 24. As shown in FIG. The base 34 of the muffler tightening device 24 is mounted in the axial direction of the muffler 10 (hereinafter referred to as the X direction) by a rail 35 as shown in FIG. 2(a).

) is slidably supported. A spindle head 36 is erected on the upper surface of this base 34, and a bearing 3 is mounted on this spindle head 36.
A main shaft 40 is rotatably supported at an angle of 8°39. A sprocket 41 is fixed to the rear part of this main shaft 40, and this sprocket 41 connects to the chain 45 shown in FIG.
The main shaft 40 is connected to a drive motor 43 via the drive motor 43, and the main shaft 40 is rotationally driven by the drive motor 43.

As shown in FIG. 1, this main shaft 40 has a cylindrical shape with a through hole in the axial direction, and the front part (the left part in FIG. 1) of the through hole is shown in FIGS. 11 and 11 below. It is a tapered fitting hole 42 as shown in FIG.

A shaft 46 consisting of an inner shaft 44 and an outer cylinder 45 is housed in the rear part of the through hole so as to be movable in the axial direction. A collet chuck 48 is fixed to the front half of this shaft 46, and a number of disc springs 50 are arranged around the rear half. (to the right), and the collet chuck 48 is pulled in the same direction and is normally in a closed state as shown in the figure.

A cylinder 52 is provided behind this shaft 46,
When the piston 54 pushes the inner shaft 44 of the shaft 46 forward against the biasing force of the spring 50, the collet chuck 48 is pushed out and opened, as shown in FIG. 9 below. It has become.

Furthermore, an air supply hole 5 is commonly provided in the center of the inner shaft 44 and the cylinder 51 for pushing out the inner shaft 44.
3 is provided, and a near compressor (air supply means) 55 is connected to this air supply hole 53, so that cleaning air containing oil is supplied from this near compressor 55 into the fitting hole 42. It has become.

On the other hand, a tool 58 to which a receiving mold 14, a cam (guiding member) 16, and an adapter 56 are fixed in order in the fitting hole 42.
can be attached and detached.

The receiving mold 14 has a tip 60 having a shape into which the end plate 12 of the muffler 10 as shown in FIGS. 16 to 19 can be fitted, and this tip 60 has a A groove 62 is provided.

The cam 16 has a cam groove (guide portion) 18 having a shape that follows the cross-sectional shape of the muffler 10, and this cam groove 18 is open toward the front.

A shaft 61 is housed in the center of the tool 58 so as to be movable in the axial direction. This shaft 61 is biased rearward by a spring 63, and has a knockout pad 65 fixed to its tip. When the cylinder 51 operates to push the inner shaft 44 and the pongee 61 forward, the knockout pad 65 projects from the receiving mold 14 and the muffler 10 is pushed out from the receiving mold 14.

The rear part of the adapter 56 has a tapered surface that matches the fitting hole 42, and can be fitted into the fitting hole 42. Further, a pull stud 64 is fixed to the rear end, and when the pull stud 64 is gripped by the collet chuck 48 in the closed state, the tool 58 is fixed to the main body of the apparatus. That is, the tool 58 is fixed to the apparatus main body side by the shaft 46, collet chuck 48, disc spring 50, cylinder 52, etc.
Alternatively, a tool attachment/detachment mechanism 66 is configured to release the tool.

On the other hand, bearings 68 and 69 are mounted on the upper left and right sides of the spindle head 36.
A pair of swing shafts 70 extending in the X direction are supported rotatably and movably in the axial direction.

The rear end of each swing shaft 70 is rotatably supported via a bearing 74 in a housing 72 provided at the rear of the device, and this housing 72 is connected to a cylinder (muffler) fixed to the rear end of the device. It is fixed to the front end of the cylinder rod 78 of the winding member actuating means) 76. As the cylinder 76 expands and contracts, the housing 72 and the swing shaft 70 move together in the X direction.

A swing bracket 80 is integrally fixed to the front end of the swing shaft 70 by a key 79, and a seaming arm 82 is swingably attached via a bearing 84. , seaming arm 8
2 and the swing shaft 70 constitute the main part of the muffler seaming member in the present invention.

The swing bracket 80 has a front plate 80a1 and a connecting portion 80b.
1 and a rear plate 80c, and a roller-shaped cam follower (guided member) 20 is rotatably attached to the lower end of the rear plate 80C. This cam follower 20 is fitted into the cam groove 18 of the cam 16 in a state where the swing shaft 70 is pulled rearward by the operation of the cylinder 76, and conversely, the swing shaft 70 is pushed forward (first (state shown in the figure), it is designed to separate from the cam groove 18 forward.

A seaming roller (muffler seaming portion) 22 is rotatably supported at the lower end of the seaming arm 82 . As shown in FIG. 3, this seaming roller 22 has a protrusion 85 that substantially matches the groove 62 of the receiving mold 14, and the tip 86 of this seaming roller 22 and the leading end of the receiving mold 14 The peripheral portion of the muffler 10 is clamped between the portion 60 and the portion 60.

As shown in FIG. 2(a), at the lower end of the seaming arm 82 and at the lower end of the front plate 80a of the swing bracket 80, one end of links 88 and 89 having the same shape as each other is rotatable. and these links 88
．． 89 and the connecting portion 8 of the swing bracket 80
A connecting shaft 90 provided at 0b is connected via a compression cylinder 92. And this compression cylinder 92
The seaming arm 82 is urged in a direction in which the seaming roller 22 is constantly pressed against the peripheral edge of the muffler 10 by the force.

An arm 95 is integrally fixed to a substantially intermediate portion of the swing shaft 70 via a key 94. A shaft 96 is provided at the free end of this arm 95, and a bearing 97 is provided at the front end of this shaft 96.

On the other hand, cylinders 98 as shown in FIGS. 2(b) and 4 are provided on both sides of the spindle head 36 in the vertical direction. This cylinder 98 is connected to the swing shaft 70.
With the cylinder rod 99 being pushed forward, the tip end 99a of the cylinder rod 99 is placed in a position where it can come into contact with the bearing 97 of the arm 95, as shown in FIG. By pushing up the arm 95 with the cylinder rod 99, the swing bracket 80 rotates about the swing shaft 70 from the solid line position in FIG. It is exposed at the front.

Next, the structure of the moving table 30 for exchanging the tool 58 is as follows.
This will be explained with reference to FIGS. 5 and 6.

A base 100 extending in the Y direction as shown in FIG. Actuation means) 102 is fixed. A mounting plate 106 is fixed to the cylinder rod 104 of the first cylinder 102, and a second cylinder (movement platform driving means) 108 is fixed on the mounting plate 106 in the opposite direction to the first cylinder 102, The moving table 30 is connected to the cylinder rod 110 of the second cylinder 108 .

A lifting table 114 is connected to the upper surface of the moving table 30 via link members 111 and 112 that intersect in an X-shape. The tool support stands 116 and 117 are Y
are arranged in parallel in the direction.

An elevating cylinder (tool support operating means) 118 is fixed to the cylinder rod 110, and the cylinder rod 118 is fixed to the cylinder rod 110.
The end of the arm 20 is connected to the link member 111 via an arm 122, and the lifting platform 114 is driven up and down by the operation of the lifting cylinder 118.

The tool support stands 116 and 117 are each mounted on the elevator stand 114 via rails 124 so as to be movable in the X direction, and a cylinder (tool support stand operating means) is moved in the same direction.
126 to be slidably driven.

Each tool support stand 116, 117 has a column 1 that stands upright.
It has 28,130. The head 129 of the column 128 is connected to the recess 13 formed on the lower surface of the receiving mold 14 of the tool 58.
It is formed so that it can be fitted into 2. As shown in FIG. 7.10, the head of the support column 130 is provided with a support portion 134 shaped to follow the lower end of the adapter 56, and in the center thereof is provided with a support portion 134 formed at the lower end of the adapter 56. A removable pin 136 is fixed within the notch 133.

Further, a reflective optical sensor 138 consisting of a light emitting element and a light receiving element is provided on the side wall of the support column 130, and the presence or absence of a tool is detected by this optical sensor 138.

Next, the operation of the muffler tightening device 24 and the tool attachment/detachment mechanism will be explained.

First, the tightening procedure using the muffler tightening device 24 will be explained. As shown in FIGS. 2(a) and 2(b), the tool 58 is attached to each muffler seaming device 24, and the base 34 is slid to retreat the muffler seaming device 24, and both muffler seaming devices are tightened. The muffler 10 is loaded between the devices 24 by a muffler loading device 26. Then, slide the base 34 to advance the muffler tightening device 24, and
The tips of the receiving mold 14 are fitted and fixed to the end plates 12 at both ends. By operating the drive motor 43 in this state and rotating the main shaft 40, the tool 58 and the muffler 10 rotate together with the main shaft 40.

At this time, since the cam follower 20 is fitted into the cam groove 18 of the cam 16, the swing bracket 80 swings around the swing shaft 70 following the cam groove 18, that is, following the circumference of the muffler 10. At the same time, the seaming roller 85 of the seaming arm 82 is pressed against the peripheral edge of the muffler 10 by the cylinder 92 connected to the swing bracket 80 . That is, as shown in Figure 3,
End of cell 11 of muffler 10 and end plate 1
As the muffler 10 rotates while the peripheral edge of the muffler 2 is sandwiched between the seaming roller 22 and the receiving mold 14, the peripheral edge of the muffler 10 is sequentially tightened outward.

After completing the tightening of the muffler 10 in this manner, the muffler 10 is gripped by the muffler unloading device 28, and the cylinder 51 is operated to remove the inner shaft 44 and the shaft 61.
By pushing out the knockout pad 6 at the tip
5 pushes out the end of the muffler 10 to disengage it from the receiving mold 14. Then, by retracting each muffler tightening device 24 again, the muffler 10 that has been tightened can be carried out by the muffler carrying-out device 28 in this state.

Next, a procedure for replacing the tool 58 of both muffler tightening devices 24 will be explained.

First, regarding the movable table 30, the tool support table 116 on one side
Nothing is placed on the tool support stand 117 on the other side, and a replacement tool 58 is attached to the tool support stand 117 on the other side. Specifically, the head 129 of the column 128 of the tool support stand 116 and the recess 13 of the tool 58
At the same time, the pin 136 of the support column 130 is inserted into the notch 133 at the lower end of the adapter 56. In addition, each tool support stand 116, 117 has a muffler tightening device 2.
It is moved to the farthest position from 4, that is, to the center position in FIG.

As for the movable table 30 itself, as shown in FIG. 5, it is placed on standby at a tool standby position away from both muffler tightening devices 24. Specifically, the first cylinder 102 is completely contracted and the second cylinder 108 is completely extended.

On the other hand, in each muffler tightening device 24, the cylinder 76 is first operated from the state where the tool 58 is completely installed, and the housing 72, the swing shaft 70, the swing bracket 80 are
etc. are pushed forward as one. As a result, as shown in FIG. 1, the cam follower 20 at the lower end of the swing bracket 80 separates from the cam groove 18 forward.

Next, by raising the cylinder rod 99 of the cylinder 98 shown in FIG. 2(b) and FIG. 4 and pushing up the bearing 97 at the tip of the arm 95, the swing wheel 70, the swing bracket 80, and the seaming arm 82 in one,
It is rotated from the solid line position in FIG. 2(a) to the two-dot chain line position in the figure. This allows the tool 58 to be completely opened forward.

Next, the first cylinder 102 shown in FIG. 5 is extended. As a result, the second cylinder 108 connected to the cylinder rod 104 and the moving table 30 move together to the left in the figure. Furthermore, by operating the cylinder 126 and moving the tool support stand 116 in the direction approaching each muffler tightening device 24, as shown in FIG. It is now located below the tool 58 in the muffler tightening device 24.

From this state, the lifting cylinder 118 is operated to raise the tool support stands 116 and 117 together with the lifting table 114. As a result, as shown in FIGS. 8 to 10, the head 129 of the column 128 of the tool support 116 is fitted into the recess 132 of the tool 58, and the pin 136 of the column 130 is inserted into the notch 133 of the adapter 56. Inserted, tool support base 1
16 and tool 58 become interengaged.

Next, as shown in FIG. 9, the cylinder 52 is actuated to push the shaft 46 and the collet chuck 84 forward, thereby opening the collet chuck 48 and releasing the tool 58.
becomes liberated.

In this state, from the near compressor 55 to the air supply hole 53
The inner wall of the fitting hole 42 and the outer circumferential surface of the adapter 56 are cleaned by sending air containing oil through the fitting hole 42 . Then, the cylinder 126 is operated, and each tool support stand 1 is
As shown in FIG.
It can be extracted from 4. Furthermore, from this state, the first
By retracting each muffler tightening device 24 as shown in FIG. 2, the movable table 30 becomes movable in the Y direction.

Next, by contracting the second cylinder 108, the new tool 58 on the tool support stand 117 is positioned at the tool mounting position, as shown in FIG. From this state, the tool 58 can be attached to each muffler tightening device 24 by performing an operation opposite to that described above.

Specifically, from the state shown in FIG. 13, each muffler tightening device 24
The adapter 56 of the tool 58 is fitted into the fitting hole 42 by moving the tool support stand 117 in a direction approaching the muffler tightening device 24. Then, the cylinder 51 is operated to close the collet chuck 48, and the tool 58 is fixed to the muffler tightening device 24 side,
The tool support stands 116 and 117 are lowered together with the lifting stand 114 and disengaged from the tool 58. Next, the first cylinder 102 and the second cylinder 108 are operated to move the moving table 3.
0 to the tool standby position, the cylinder rod 99 of the cylinder 98 is lowered to return the swing bracket 80, etc. to the position shown by the solid line in FIG. By retracting the bracket 80 and seaming arm 22 and fitting the cam follower 20 into the cam groove 18 of the cam 16 from the front, the cam follower 20 can be put into a usable state.

As described above, according to the mechanism described herein, the tool 58 can be replaced automatically and easily by simply operating each operating means such as a cylinder as appropriate.

Furthermore, as shown in FIG. 1, if an air supply hole 53 is provided in the main body of the device and cleaning air is supplied into the fitting hole 42 through the air supply hole 53, the inner wall of the fitting hole 42 and the adapter 5
Dust etc. adhering to 6 can be easily removed.

Note that the present invention is not limited to such embodiments, and may take the following embodiments as examples.

(1) In the above embodiment, a mechanism was described in which both tools 58 of the muffler tightening devices 24 disposed on both sides of the muffler 10 are replaced at the same time. It can also be applied to a mechanism for exchanging tools.

(2) In the above embodiment, the muffler tightening device 24 is provided with a pair of muffler tightening members (swing bracket 80, etc.), but in the present invention, a single muffler tightening member or The present invention can also be applied to devices having three or more muffler tightening members.

(3) In the present invention, any suitable device such as a motor may be used in addition to the above-mentioned cylinder, regardless of the specific configuration of the moving table operating means, muffler tightening member operating means, etc.

(4) In the embodiment described above, a plurality of tool supports 116 and 117 are raised and lowered together, but in the present invention, each tool support may be raised and lowered individually. Further, each tool support stand may be slid together in the horizontal direction.

(5) In the above embodiment, a structure was shown in which the rocking bracket, etc., which is the muffler seaming member, is pushed forward and the rocking bracket, etc. is pushed upward. If the member is disposed at a position where it does not get in the way during tool replacement, the means for pushing up the muffler tightening member, etc. can be omitted.

(6) In the present invention, regardless of the specific configurations of the guide portion and the guided portion, those having a well-known structure such as what is generally known as a cam mechanism may be used as appropriate.

〔Effect of the invention〕

As described above, according to the present invention, by simply operating each operating means such as the muffler tightening member operating means and the moving platform operating means at appropriate timings, tool changing operations that conventionally required manual work can be automatically performed. Moreover, it can be easily performed, which has the effect of increasing the efficiency of tool changing work.

Furthermore, according to the muffler tightening device, which is equipped with a gas supply means for supplying cleaning gas to a portion of the muffler tightening device body where the tool is inserted and removed, the device body and the tool surface are automatically and It has the effect of being easy to clean.

[Brief explanation of drawings]

FIG. 1 is a sectional side view of a muffler tightening device according to an embodiment of the present invention, FIG. 2(a) is a front view of the same tightening device, and FIG. 2(b) is a cutaway side view of the same tightening device. Fig. 3 is a sectional view showing the muffler seaming part of the seaming device, Fig. 4 is a partially sectional front view showing the cylinder provided in the seaming device, and Fig. 5 shows the movable table in the tool standby position. 14 is a cross-sectional front view showing a certain state, and FIG. 7 is a view taken along arrow B in FIG. 6, FIG. 8 is a partially sectional side view showing the tool support in a state in which the tool support is engaged with a tool in the main body of the device, and FIG. 9 is a view taken along line IX-■ in FIG. 8. Cross section, 10th
The figure is a view taken in the direction of arrow C in Fig. 9, Fig. 11 is a partial cross-sectional side view showing a state in which the tool engaged with the tool support is pulled out from the device main body, and Fig. 12 is a side view in which the device main body is retracted. FIG. 13 is a partially sectional side view showing the new tool moved to the tool changing position; FIG. 14 is an overall plan view of the muffler tightening system including the muffler tightening device described above. 15 is an overall side view of the muffler tightening system, FIG. 16(a) is a front view of the muffler before being tightened, FIG. 16(b) is a cross-sectional side view of the same muffler, and FIG. The figure is a cross-sectional side view of the muffler after it has been tightened.
8 is an enlarged view of part A in FIG. 17, and FIG. 19 is a cross-sectional plan view showing the state of engagement between a conventional muffler tightening device and a muffler. 10... Muffler 14... Receiving mold, 16... Cam (guide member), 18... Cam groove (guide part), 20...
- Cam follower (guided member), 22... Seaming roller (muffler seaming part), 24... Muffler seaming device, 36... Spindle head, 40... Main shaft, 42... Fitting Hole, 53... Near compressor (air supply means),
58... Tool, 66... Tool attachment/detachment mechanism, 70...
Swinging wheel (constituting the muffler tightening member), 76... Cylinder (muffler tightening member operating means), 80... Swinging bracket (constituting the muffler tightening member), 82... Seaming arm (muffler constituting a seaming member), 102...
1st cylinder (moving table operating means), 108... 2nd cylinder (moving table operating means), 116.117... Tool support stand, 118... Lifting cylinder (tool support stand operating means), 126. ...Cylinder (tool support stand driving means). Figure 3

Claims (1)

[Scope of Claims] 1. A receiving mold to which the end of the muffler is mounted, a guide member having a guide portion having a shape that follows the cross-sectional shape of the muffler, and a guide member movably attached to the main body of the device and a guide for the guide member. a muffler tightening member having a guided portion that is engaged with the muffler circumferential portion and a muffler tightening portion that is pressed against the muffler peripheral edge; In a muffler tightening device that sequentially tightens the muffler periphery by rotating the receiving mold and the guide member together while pinching the muffler periphery between the receiving mold and the receiving mold, the muffler tightening device sequentially tightens the muffler periphery from the receiving mold and the guiding member to the main body of the device. A mechanism for automatically exchanging a tool, wherein the tool is configured to be able to be inserted into and removed from the main body of the device in the axial direction of the muffler, and the guided part is aligned with the axis of the muffler relative to the guide part of the guide member. a tool attachment/detachment mechanism configured to be able to be inserted and removed in any direction and capable of switching between a state in which the tool is fixed to the device main body side and a state in which it is released; muffler tightening member operating means for moving the guided portion between a position where the guided portion is fitted into the guide member and a position where the guided portion is removed from the guide member; and a plurality of tool supports that are movable up and down and move in the axial direction of the muffler. A movable base that is movably provided and moves between a tool exchange position where each tool support is located below the tool and a tool standby position where each tool support is separated from the tool; and a movable base that drives this movable base. The tool is characterized by comprising an actuating means and a tool support actuating means for actuating each tool support, and configured such that the tool is engaged with the tool support in a raised state. Automatic tool change mechanism for muffler tightening device. 2. The automatic tool exchange mechanism for a muffler tightening device according to claim 1, further comprising a gas supply means for supplying cleaning gas to a portion of the muffler tightening device body into which the tool is inserted and removed.