JP3245493U - Parts supply device, parts supply unit, and resistance welding machine using the same - Google Patents

Abstract

The present invention provides a component supply device, a component supply unit, and a resistance welding machine using the same, which can smoothly feed components to a component receiving section while reducing the number of components. A component supply device (110) includes a chute (120) in which a tip portion (121) can be placed on the movement trajectory of a movable electrode of a resistance welding machine. The chute 120 receives the welding bolt WB from above and is arranged to be inclined with respect to the vertical direction. is rotatably arranged. The guide block 140 is driven by an air cylinder 192 serving as a third driving means, and thereby has a component receiving position where the welding bolt WB can be received and a supplying position where the welding bolt WB can be supplied to the component receiving portion 187. It is structured so that it can be taken. [Selection diagram] Figure 11

Description

The present invention relates to a parts supply device, a parts supply unit, and a resistance welder using the same for supplying parts to a resistance welding machine.

As a conventional component supply device, component supply unit, and resistance welding machine using the same, there is one described in Patent Document 1, which was previously published by the present applicant. According to this, the component is a welding bolt having a shaft portion and a flange portion, the electrode for holding the component is a movable electrode disposed on the upper side, and the chute includes a fixed chute and a fixed chute. It was equipped with a movable chute located above the.

The fixed chute is provided with a parts waiting section for waiting the parts, and the parts are supplied to the parts receiving part by moving the movable chute by the fourth driving means while waiting in the parts waiting part. (See paragraphs 0125 to 0165 and FIGS. 16 to 20 for modified examples of the component supply device).

Japanese Patent Application Publication No. 2022-38791

However, the above-mentioned parts feeding device, parts feeding unit, and resistance welding machine using the same have a large number of parts, and the parts may not sit stably in the parts waiting area, causing them to get caught during feeding and malfunction. There was a risk that it would happen.

The present invention provides a component supply device, a component supply unit, and a resistance welding machine using the same, which can smoothly feed components to a component receiving section while reducing the number of components.

The device according to claim 1 of the present invention is a component feeding device that is attached to a non-movable part of a resistance welding machine that welds a workpiece and a component,
comprising a chute whose tip can be placed on the movement trajectory of the movable electrode of the resistance welding machine,
The tip of the chute has a component receiving part that receives the component fed from the upstream side and enables transfer to the movable electrode, and is driven by a first driving means,
a supply state located near the movable electrode and capable of supplying the component;
a retracted state in which no interference occurs with the movable electrode;
It is configured so that it can take
The tip of the chute includes a pair of divided pieces, and the pair of divided pieces are driven by the first driving means and are configured to be able to swing toward and away from each other,
When the pair of divided pieces are close to each other, the component receiving portion is formed and the supply state is reached;
When the pair of divided pieces are in a separated state where they are separated from each other, the split piece is configured to be in the retracted state,
The component is a welding bolt having a shaft portion and a flange portion,
the electrode on which the component is held is a movable electrode disposed on the upper side;
The chute receives the parts from above and is arranged to be inclined with respect to the vertical direction,
A guide block is rotatably disposed in the chute and has a component waiting section for waiting the components sent from above,
The guide block is driven by a third driving means, and has a component receiving position where the component can be received and a supply position where the component can be supplied to the component receiving section.
It is structured so that it can be taken.

According to this, with the simple configuration of the guide block and the third drive means, it is possible to receive the components fed from the upstream side at the component receiving section, so that the seating posture of the components can be stabilized. Therefore, the number of parts can be reduced and the parts can be sent smoothly to the parts receiving section.

Further, the chute includes a component supply pipe arranged on the upstream side in the feeding direction of the components,
The component standby part includes a tapered part that receives the flange part, and a shaft part receiving part that receives the shaft part,
When viewed from the direction of the rotational axis of the guide block, the guide block is formed in a substantially J-shape with the tapered portion side open;
The side remote from the component receiving portion is formed to protrude from the tapered portion, and has an auxiliary surface portion that comes into contact with the component and assists in feeding the component.

According to this, the feeding can be assisted by the auxiliary surface portion, which leads to smooth supply of parts.

Further, the component standby section is connected to a positive pressure means,
When the guide block is in the supply position, the positive pressure means discharges air to assist in supplying the component.

According to this, the feeding of the parts can be assisted by discharging the air from the positive pressure means, which leads to smooth supply of the parts.

The invention according to claim 4 is a parts supply unit,
The parts supply device according to claim 1;
A parts supply unit comprising: a movable electrode side device disposed on the movable electrode of the resistance welding machine,
The movable electrode side device is
The movable electrode is configured with a holding shaft that is movable with respect to the movable electrode along the axis of the movable electrode by a second driving means and that is capable of holding the component by suction. death,
The holding shaft is movable between a standby position where it waits within the movable electrode and an advanced position where it protrudes from the movable electrode and can suck the component from the component receiving portion,
The distal end of the chute is brought into the supply state, and the holding shaft advances from the standby position to the advance position to suck the component, and the chute holds the component. When the distal end portion is in the retracted state and the movable electrode welds the component to the workpiece, the holding shaft moves to the standby position.

According to this, it is possible to provide a component supply unit that exhibits the effects of the above-described component supply device.

The invention according to claim 5 is a resistance welding machine,
A resistance welding machine for welding the workpiece and the component, the component being held by the movable electrode,
comprising the component supply unit according to claim 4,
The movable electrode side device is disposed on the movable electrode, and the chute is attached to the non-movable portion of the resistance welding machine.

According to this, it is possible to provide a resistance welding machine that exhibits the effects of the above-mentioned component supply device.

FIG. 1 is a front view of a resistance welding machine equipped with a component supply unit according to an embodiment of the present invention. FIG. 1 is a right side view of a resistance welding machine equipped with a component supply unit according to an embodiment of the present invention. FIG. 3 is a left side view of the parts supply unit. 4 is a sectional view taken along the line IV-IV in FIG. 3. FIG. FIG. 3 is a left side view of the movable electrode side device. 6 is a sectional view taken along the line VI-VI in FIG. 5. FIG. FIG. 3 is a left side view of the parts supply device. FIG. 3 is a front view of the parts supply device. 9 is a view taken along the line IX in FIG. 8. FIG. It is an X-ray arrow view of FIG. 8 is a sectional view taken along the line XI-XI in FIG. 7. FIG. 12 is a sectional view taken along the line XII-XII in FIG. 11. FIG. 12 is a sectional view taken along the line XIII-XIII in FIG. 11. FIG. (A) is a perspective view of the guide block as seen from the rear side, and (B) is a perspective view from the front side. FIG. 3 is an explanatory diagram of the operation of the component supply unit. This is an explanatory diagram of the operation of the parts supply unit, and is a continuation of FIG. 15. This is an explanatory diagram of the operation of the parts supply unit, and is a continuation of FIG. 16. This is an explanatory diagram of the operation of the parts supply unit, and is a continuation of FIG. 17. This is an explanatory diagram of the operation of the parts supply unit, and is a continuation of FIG. 18. This is an explanatory diagram of the operation of the parts supply unit, and is a continuation of FIG. 19. This is an explanatory diagram of the operation of the parts supply unit, and is a continuation of FIG. 20.

An embodiment of a resistance welding machine equipped with a component supply unit according to the present invention will be described based on the drawings. In the following description, of the arrows shown in each drawing, F is the front, B is the back, R is the right, L is the left, U is the top, and D is the bottom.

An embodiment of the resistance welding machine according to the present invention will be described based on the drawings. In the resistance welding machine 10, as shown in FIGS. 1 and 2, the component supply unit 100 is configured to weld a welding bolt WB having a shaft portion WB1 and a flange portion WB2 as components (FIG. 19, etc.). ) is supplied to the upper movable electrode 16 (the electrode on which the component is held) of the resistance welding machine 10, the movable electrode 16 receives and holds the welding bolt WB, and the welding bolt WB is placed on the lower fixed electrode 18. The welding bolt WB is welded to the workpiece W by inserting a flat plate-shaped workpiece W (see FIG. 19, etc.), sandwiching the welding bolt WB and the workpiece W between the movable electrode 16 and the fixed electrode 18, and applying electricity. .

As shown in FIGS. 1 and 2, the resistance welding machine 10 includes a movable electrode 16 on the upper side and a fixed electrode 18 on the lower side. The movable electrode 16 is held by the movable horn 15 and is fixed. The electrode 18 is held by the fixed horn 17. The movable horn 15 is fixed to a vertically moving cylinder rod 14a of an air cylinder 14 held by the upper support arm 12, and when the air cylinder 14 operates, the movable electrode 16 held by the movable horn 15 moves. It descends toward the fixed electrode 18. The main body 11 has an upper support arm 12 arranged to extend forward at the upper part, a lower support arm 13 arranged at the lower part to extend forward, and the fixed side horn 17 is held by the lower support arm 13. There is.

The component supply unit 100 includes a movable electrode side device 20 and a component supply device 110, as shown in FIGS. 3 to 13 and the like.

A movable electrode side device 20 that can attract and hold the welding bolt WB is disposed on the movable electrode 16. As shown in FIGS. 3 to 6, the movable electrode side device 20 includes an electrode tip 30, a shank 32, a main holder 33, an outer tube 34, a cooling jacket 35, a holding shaft 38, an adapter 42, and an air A cylinder 45 (corresponding to the second driving means in the claims).

The electrode chip 30 is formed in a cylindrical shape and has a through hole penetrating in the vertical direction, and the through hole has a large inner diameter portion 30a extending from the top surface to the bottom surface of the electrode chip 30, and a diameter smaller than the large inner diameter portion 30a. It has a small inner diameter portion 30b. A tip member 40 of a holding shaft 38, which will be described later, can be inserted into the large inner diameter portion 30a and the small inner diameter portion 30b.

A shank 32 is attached to the top of the electrode tip 30.

The shank 32 includes a lower small diameter part 32a, a large diameter part 32b formed to have a larger diameter than the lower small diameter part 32a, and a medium diameter part 32c formed to have a larger diameter than the lower small diameter part 32a and a smaller diameter than the large diameter part 32b. ,have. The shank 32 has a stepped through hole that extends circularly in the vertical direction. The stepped through hole has a large inner diameter portion 32d extending from the upper surface to the lower surface of the shank 32, and a small inner diameter portion 32e formed to have a smaller diameter than the large inner diameter portion 32d.

The large inner diameter portion 32d is formed to have a diameter through which a large diameter portion 40c of a tip member 40 (described later) can be inserted, and the small inner diameter portion 32e is formed to have a diameter through which a medium diameter portion 40b of a tip member 40 (described later) can be inserted.

The lower small diameter portion 32a of the shank 32 is fitted into the large inner diameter portion 30a of the electrode tip 30, so that the electrode tip 30 and the shank 32 are connected.

A main holder 33 is attached to the upper part of the shank 32.

The main holder 33 is formed into a substantially cylindrical shape. The main holder 33 has a through hole extending from the lower surface to the upper surface, and the through hole has a lower large inner diameter section 33a, an upper large inner diameter section 33b formed to have approximately the same diameter as the lower large inner diameter section 33a, and a lower large inner diameter section 33b. It has an inner diameter portion 33a and a small inner diameter portion 33c formed to have a smaller diameter than the upper large inner diameter portion 33b. A pair of horizontal holes 33d passing through from the inner surface to the outer surface are formed at the upper end of the small inner diameter portion 33c.

The middle diameter portion 32c of the shank 32 and the inner circumferential surface of the lower large inner diameter portion 33a of the main holder 33 are screwed together to connect the shank 32 and the main holder 33.

A cylindrical outer tube 34 is fitted on the outside of the main holder 33. A horizontal hole 34a penetrating from the outer surface to the inner surface is formed in the upper part of the outer tube 34.

A cooling jacket 35 is attached to the outside of the upper end of the outer tube 34.

The cooling jacket 35 is formed into a cylindrical shape and has a through hole 35a that penetrates in the vertical direction. The cooling jacket 35 is formed with a horizontal hole 35b that penetrates from the outer peripheral surface to the through hole 35a. The cooling jacket 35 is attached to the main holder 33 and the outer tube 34 by connecting the horizontal hole portion 33d, the horizontal hole 34a, and the horizontal hole 35b and fastening them with bolts 36. Further, a hose nipple 37 is attached to the cooling jacket 35 to allow cooling water to flow therethrough.

The holding shaft 38 is composed of a main body member 39 and a tip member 40.

The main body member 39 is formed in a cylindrical shape and has a lower bottomed hole 39a extending from the lower surface to the upper surface, and an upper bottomed hole 39b extending from the upper surface to the lower surface.

The tip member 40 includes a small diameter portion 40a, a medium diameter portion 40b formed with a larger diameter than the small diameter portion 40a, and a large diameter portion 40b formed with a larger diameter than the medium diameter portion 40b and connecting the small diameter portion 40a and the medium diameter portion 40b. It has a diameter portion 40c and is formed into a substantially stepped columnar shape.

The outer diameter of the large diameter portion 40c is approximately the same as the outer diameter of the main body member 39.

A bottomed hole 40d extending from the bottom surface to the top surface is formed at the lower end of the medium diameter portion 40b, and a magnet 41 is attached within the bottomed hole 40d.

The holding shaft 38 is integrally formed by threading the lower bottomed hole 39a of the main body member 39 and the small diameter portion 40a of the tip member 40.

An adapter 42 is attached to the upper part of the main holder 33. The adapter 42 has a small diameter portion 42a and a large diameter portion 42b having a larger diameter than the small diameter portion 42a, and is formed in a stepped cylindrical shape. The adapter 42 is formed with a through hole 42c that penetrates from the top surface to the bottom surface. A horizontal hole 42d is formed that penetrates from the outer peripheral surface of the large diameter portion 42b to the through hole 42c. An air joint member 43 is attached to the horizontal hole 42d.

The joint member 43 is connected to a ventilation pipe and an air compressor (not shown). The air from the air compressor removes dust from inside the large inner diameter section 30a, small inner diameter section 30b, large inner diameter section 32d, small inner diameter section 32e, lower large inner diameter section 33a, upper large inner diameter section 33b, small inner diameter section 33c, and through hole 42c. etc. can be air blown.

An air cylinder 45 is attached to the upper part of the adapter 42.

The air cylinder 45 includes a cylinder tube 46 and a piston rod 47, and the piston rod 47 can move back and forth below the air cylinder 45.

The air cylinder 45 is formed with an upper port 49 and a lower port 51 from above, and flow rate adjustment valves 52 and 52 are attached to the upper port 49 and the lower port 51, respectively, so that the flow rate of intake and exhaust air can be adjusted. It is said that

The air cylinder 45 and the adapter 42 are connected by screwing together a small diameter portion 46a formed at the lower end portion of the cylinder tube 46 and a through hole 42c of the adapter 42.

The air cylinder 45 is connected to a control circuit and an air compressor (not shown).

The piston rod 47 and the holding shaft 38 are connected by the lower end 47a of the piston rod 47 being screwed into the upper bottomed hole 39b of the main body member 39 of the holding shaft 38.

When air flows in from the upper port 49, the piston rod 47 moves downward and advances to an advanced position, which will be described later. In this state, when movable electrode 16 contacts flange portion WB2 of welding bolt WB when welding welding bolt WB to work W using movable electrode 16, piston rod 47 and holding shaft 38 may be pushed back upward. It is considered possible. Then, when air flows in from the lower port 51, the piston rod 47 is lifted and moved to a standby position, which will be described later.

In this embodiment, the holding shaft 38 includes a large inner diameter section 30a, a small inner diameter section 30b, a large inner diameter section 32d, a small inner diameter section 32e, a lower large inner diameter section 33a, an upper large inner diameter section 33b, a small inner diameter section 33c, and a through hole 42c. It is arranged so that it can be moved inside.

A rod portion of the piston rod 47 is inserted through the through hole 42c of the adapter 42, the upper large inner diameter portion 33b of the main holder 33, and the upper portion of the small inner diameter portion 33c.

A cylindrical resin collar 53 is attached between the inner surface of the small inner diameter portion 33c of the main holder 33 and the outer surface of the main body member 39 of the holding shaft 38.

As shown in FIGS. 1 and 2, the component supply device 110 is attached to the upper support arm 12 via a mounting frame 19, a mounting plate 101, and a mounting arm 102. In other words, it is attached to a non-movable part of the resistance welding machine 10.

The component supply device 110 includes a chute 120 and an individual feeding unit 190, as shown in FIGS. 3, 4, 7 to 14, etc.

The chute 120 includes a fixed chute 130 and a movable chute 160, as shown in FIGS. 3, 4, 7 to 13, and the like.

The fixed chute 130 includes a sub-chute 132 and a hose holder 231.

The sub-chute 132 is composed of a pair of sub-chute forming members 133A and 133B that are line-symmetrical in the front-rear direction.

The sub-chute forming members 133A and 133B are formed in a rectangular column shape. In addition, when the sub-chute forming members 133A and 133B are opposed to each other, the opposing upper corner portions have a vertical surface that descends perpendicularly from the upper end surface and an inclined surface that is inclined with respect to the vertical surface. It has a rectangular notch 134 having a surface.

The sub-chute forming members 133A and 133B include a wide portion 135 disposed on the left side, a narrow portion 136 formed narrower than the wide portion 135 and capable of arranging a guide block 140, which will be described later, and a narrow portion 136 that is narrower than the wide portion 135. It has a mounting portion 137 formed narrowly and to which the fixing bracket 191 can be attached.

The width of the slope of the notch 134 is wide at the wide portion 135 and narrower at the narrow portion 136 than the wide portion 135.

The sub-chute forming members 133A and 133B are each formed with a through hole (not shown) that penetrates in a direction perpendicular to the component feeding direction. The insertion hole enables detection of light beams from a pair of photoelectric sensors 149, which will be described later.

A flat spacer 147 is attached to the rear surface of the sub-chute forming member 133A, the front surface of the sub-chute forming member 133B, and the periphery of the insertion hole. The spacer 147 is provided with a through hole (not shown) that can communicate with the above-mentioned through hole.

A photoelectric sensor 149 is attached to the opposite side of the spacer 147 from the subchute forming members 133A and 133B via a bent flat sensor bracket 148. The photoelectric sensor 149 is for detecting the presence of a welding bolt WB at a position when the welding bolt WB is received in a component waiting section 141 of a guide block 140, which will be described later.

The sub-chute 132 is configured with a pair of sub-chute forming members 133A and 133B facing each other, and a passage forming portion 138 is formed by the notch 134 and the surface where the other sub-chute forming members 133A and 133B face each other. be done.

A cover 139 having a substantially U-shaped cross section is attached between the upper surfaces of the pair of sub-chute forming members 133A and 133B.

A guide block 140 is rotatably disposed in the chute 120 and has a component waiting section 141 for waiting a welding bolt WB sent from above.

The guide block 140 is driven by an air cylinder 192, which will be described later, as a third driving means, and has a component receiving position where the welding bolt WB can be received and a supplying position where the welding bolt WB can be supplied to the component receiving portion 187. , is configured so that it can take .

The guide block 140 is formed into a flat plate shape and includes a component standby section 141 that receives a welding bolt WB.

The component standby section 141 includes a tapered section 141a that receives the flange section WB2, and a shaft section receiving section 141b that receives the shaft section WB1.

The tapered portion 141a is formed in a tapered shape that is wide on the open side and narrow on the shaft portion receiving portion 141b side.

The shaft portion receiving portion 141b is formed to have a larger width and depth than the shaft portion WB1. An air joint 142 connected to a compressor as a positive pressure means (not shown) is connected to the bottom portion of the shaft receiving portion 141b.

The air joint 142 assists in supplying the welding bolts WB by discharging air from the compressor through the air joint 142 when the guide block 140 is in the supply position.

The guide block 140 is formed in a substantially J-shape with the tapered portion 141a side open when viewed from the rotational axis direction of the guide block 140, and the width in the front-rear direction is slightly narrower than the width of the flange portion WB2 of the weld bolt WB. It is formed.

In the component receiving state, the guide block 140 has an auxiliary surface portion 143 that is formed so that the side facing away from the component receiving portion 187 protrudes from the tapered portion 141a and comes into contact with the welding bolt WB to assist in feeding the welding bolt WB.

At the component receiving position, the guide block 140 has a shaft support 144 that is formed so that the side facing away from the component receiving portion 187 protrudes to the right in a square column shape, and is pivotally supported by a shaft support block 193, which will be described later.

The hose holder 231 serving as a component supply pipe is formed into a cylindrical shape having an insertion hole 231a through which the weld bolt WB can be moved with the shaft portion WB1 side facing down. The lower end surface of the hose holder 231 is cut off at an angle to correspond to the slope of the upper surface of the sub-chute 132. The hose holder 231 is formed to be able to communicate with a component standby section 141 of a guide block 140, which will be described later.

A holder 232 is attached to the hose holder 231 on the outside of the lower center in the vertical direction.

The holder 232 is formed in the shape of a rectangular parallelepiped, has an insertion hole 232a that penetrates in the vertical direction, and has a split groove 232b that reaches the insertion hole 232a from the right side. The holder 232 and the hose holder 231 are connected by inserting the hose holder 231 into the insertion hole 232a and fastening with a bolt 232c across the split groove 232b.

The left surface of the holder 232 and the upper surface of the main body block 150, which will be described later, are connected by a mounting bracket 235 having an L-shaped cross section.

The sub-chute 132 includes a pair of sub-chute forming members 133A and 133B arranged at intervals in the front-rear direction.

The sub chute 132 and the movable chute 160 are connected via a main body block 150.

The main body block 150 is formed into a substantially rectangular parallelepiped shape, and has an inclined surface portion 151 formed by cutting out a triangular prism on the lower right side. Further, the main body block 150 has a thin plate-shaped cutout on the upper left side, and has an attachment portion 152 to which an air chuck 170, which will be described later, can be attached.

A rectangular parallelepiped-shaped stopper block 153 is attached to the lower side of the attachment portion 152 of the main body block 150. The stopper block 153 comes into contact with a pair of fingers 172 of an air chuck 170, which will be described later, to restrict movement of the fingers 172.

The main body block 150 and the pair of sub-chute forming members 133A, 133B are assembled by aligning the inclined surface portion 151 of the main body block 150 and the upper surfaces of the sub-chute forming members 133A, 133B and tightening them with bolts (not shown). connected.

A region surrounded by the passage forming portion 138, the inclined surface portion 151 of the main body block 150, and the cover 139 becomes the component passage 122 of the sub-chute 132.

The movable chute 160 includes an air chuck 170 (corresponding to the first driving means in the claims) and a pair of divided pieces 180A and 180B.

As the air chuck 170, an existing air chuck is used (MHC2-20S manufactured by SMC).

The air chuck 170 is attached to the main body block 150 by fastening with bolts (not shown) with the right side and lower surface of the body 171 of the air chuck 170 facing the mounting portion 152 of the main body block 150. .

Lever 173 formed in the shape of a square tube is attached to the outside of a pair of square tube-shaped fingers 172 extending downward from the body 171 of the air chuck 170 so as to extend in the vertical direction.

A guide member 174 having a substantially L-shaped cross section is attached to the inner side of the lower end portions of the pair of levers 173 in the front-rear direction.

Inside the pair of guide members 174, there are a pair of divided pieces 180A and 180B, which constitute the tip 121 of the chute 120 and have a line-symmetrical shape in the front-back direction, with the left side facing downward in the horizontal direction. It is installed at an angle.

The divided pieces 180A and 180B each have a passage forming part 181 formed in a rectangular tube shape and a component receiving part forming part 182 formed at an angle with respect to the passage forming part 181.

The component receiving part forming part 182 includes a flange part receiving part 182a formed as a substantially semi-truncated cone-shaped recess extending from the upper surface to the lower surface, and a shaft part receiving part 182a formed as a substantially semi-cylindrical recess extending from the inside to the outside. 182b.

A magnet arranging part 183 formed as a recess extending from the left surface to the right surface is provided at the left end of the component receiving part forming part 182, and magnets 184 are fitted into the magnet arranging part 183, respectively.

A magnet holder 185 is attached to the left side of the component receiving part forming part 182, which is formed in a flat plate shape and can cover the magnet 184.

A flat chute cover 175 is attached to the upper surface of the guide member 174. The chute cover 175 is formed so as to be able to cover the upper sides of divided pieces 180A and 180B, which will be described later.

When the pair of divided pieces 180A, 180B are close to each other, the lower surface of the chute cover 175, the inner surface of the guide member 174, the upper surface of the divided pieces 180A, 180B, and the space between the divided pieces 180A and 180B. The region formed by the space is defined as a component passage 186 through which components pass.

In a state where the pair of divided pieces 180A and 180B are close to each other, the flange part receiving part 182a, the shaft part receiving part 182b, and the space around the flange part receiving part 182a and the shaft part receiving part 182b of the component receiving part forming part 182 Component receiving portion 187 of welding bolt WB is configured. That is, the tip portion 121 of the chute 120 is configured with a component receiving portion 187 for the welding bolt WB.

In the component receiving portion 187, the welding bolt WB is held while being restrained from moving by the magnetic force of the magnet 184 when the pair of divided pieces 180A and 180B are in close proximity.

When the fingers 172 of the air chuck 170 move closer to each other and come into contact with the stopper block 153, the pair of divided pieces 180A and 180B are prevented from approaching each other, and the pair of divided pieces 180A , 180B are in close proximity without interference.

Furthermore, when the fingers 172 of the air chuck 170 move away from each other, the pair of divided pieces 180A and 180B separate, forming a space in which no interference with the movable electrode 16 occurs.

As shown in FIGS. 3, 4, 7 to 14, the individual feeding unit 190 includes a pair of fixing brackets 191 and an air cylinder 192 (corresponding to the third driving means in the claims). .

The fixing brackets 191 are each made of metal and formed into a flat plate shape, and are attached to the outer surfaces of the sub-chute forming members 133A and 133B with bolts.

An air cylinder 192 is attached so as to be sandwiched between the fixed brackets 191, 191 in the front-rear direction.

A shaft support block 193 is disposed on the piston rod 192a of the air cylinder 192.

The pivot block 193 is formed in a substantially U-shape with an open bottom, and is attached to the pivot support 144 of the guide block 140 so as to be rotatable about the front-rear direction.

The air cylinder 192 is connected to a control circuit and an air compressor (not shown).

As shown in FIG. 9, the component supply device 110 is attached to the attachment frame 19 on the rear surface of the main body block 150 via an attachment plate 101 and an attachment arm 102.

The functions and effects of the component supply unit 100 having the above configuration will be explained.

As shown in FIG. 4, in the movable electrode side device 20, the piston rod 47 of the air cylinder 45 is in the uppermost position with air flowing in from the lower port 51, and is connected to the piston rod 47. The holding shaft 38 is also in the uppermost position (hereinafter referred to as a standby position).

In addition, in the component supply device 110, as shown in FIGS. 8, 11, etc., the divided pieces 180A and 180B of the movable chute 160 are close to each other, and as shown in FIG. 15, the welding bolt WB is The guide block 140 is at a component receiving position received in the component waiting section 141, and is at a supplying position where welding bolts WB can be supplied to the component receiving section 187.

As shown in FIGS. 19 to 21, the fixed electrode 18 is formed with an insertion hole 18a through which the shaft portion WB1 of the welding bolt WB can be inserted, and the welding bolt WB is connected to the hole W1 formed in the workpiece W to be welded. , the insertion holes 18a are aligned.

From this state, when the air cylinder 192 is driven to rotate the guide block 140 and the guide block 140 moves to the supply position where the welding bolt WB can be supplied to the component receiving part 187, the welding bolt WB is transferred to the sub-chute 132. It slides down the parts passage 122 of , the parts passage 186 of the tip part 121 under its own weight, and moves to the parts receiving part 187 .

To explain in detail, when transitioning from FIG. 15 to FIG. 16, the auxiliary surface portion 143 pushes the flange portion WB2 of the welding bolt WB. The end edge of the flange portion WB2 is fed while riding on the notch 134 of the sub-chute 132. At this time, air is fed under pressure from the air joint 142. 17 and 18 continue, and the welding bolt WB is delivered to the component passage 186 of the tip portion 121.

Since the magnet 184 is disposed near the component receiving portion 187, the welding bolt WB is reliably received by the component receiving portion 187, as shown in the figure.

When the photoelectric sensor 149 no longer detects the welding bolt WB, the air cylinder 192 is driven to move the guide block 140 to a component receiving position where it can receive the welding bolt WB, and as shown in FIG. The incoming welding bolt WB is received in the component standby section 141.

When the welding bolt WB is reliably received in the component receiving portion 187 and air is allowed to flow in from the upper port 49 and air is allowed to flow out from the lower port 51, the piston rod 47 moves to the lowest position. .

Further, the holding shaft 38 connected to the piston rod 47 also moves to the lowest position (hereinafter referred to as the advanced position).

When the holding shaft 38 moves to the advanced position, as shown in FIG. The welding bolt WB is attracted by the magnet 41 arranged at the lower end of the diameter portion 40b.

Then, the air chuck 170 is driven to spread the pair of fingers 172. Then, as shown in FIG. 20, the pair of divided pieces 180A and 180B are separated from each other, forming a space in which no interference with the movable electrode 16 occurs.

With the holding shaft 38 adsorbing the welding bolt WB, the air cylinder 14 is driven to lower the movable electrode 16 to the position shown in FIG. part WB1 enters, and the lower surface of the holding shaft 38 is pushed back upward by the pressing force of the movable electrode 16 until it is substantially flush with the lower surface of the electrode tip 30, making it possible to weld the welding bolt WB.

In this state, air is allowed to flow out from the upper port 49 and air is allowed to flow in from the lower port 51. Then, the piston rod 47 returns to the uppermost position, and the holding shaft 38 connected to the piston rod 47 also returns to the standby position.

Then, the welding bolt WB is welded to the workpiece W at the flange portion WB2. When welding is finished, the movable electrode 16 rises and returns to its original position.

If the above invention is viewed as a component supply device, it is a component supply device 110 that is attached to a non-movable part of a resistance welding machine 10 that welds a workpiece W and a component,
Equipped with a chute 120 in which a tip portion 121 can be placed on the movement trajectory of the movable electrode 16 of the resistance welding machine 10,
The tip portion 121 of the chute 120 has a component receiving portion 187 that receives components fed from the upstream side and enables transfer to the movable electrode 16, and is driven by an air chuck 170 as a first driving means. By doing so,
a supply state located near the movable electrode 16 and capable of supplying components;
a retracted state in which no interference occurs with the movable electrode 16;
It is configured so that it can take
The tip portion 121 of the chute 120 includes a pair of divided pieces 180A and 180B, and the pair of divided pieces 180A and 180B are configured to be able to swing toward and away from each other by being driven by an air chuck 170.
When the pair of divided pieces 180A and 180B are close to each other, the component receiving portion 187 is formed and the supply state is established;
When the pair of divided pieces 180A and 180B are in a separated state where they are separated from each other, they are configured to be in a retracted state,
The part is a welding bolt WB having a shaft portion WB1 and a flange portion WB2,
The electrode on which the welding bolt WB is held is the movable electrode 16 disposed on the upper side,
The chute 120 receives the welding bolt WB from above and is arranged to be inclined with respect to the vertical direction,
A guide block 140 having a component waiting section 141 for waiting the welding bolt WB sent from above is rotatably disposed in the chute 120.
The guide block 140 is driven by an air cylinder 192 serving as a third driving means, and has a component receiving position where it can receive the welding bolt WB, and a supply position where it can supply the welding bolt WB to the component receiving portion 187.
It is structured so that it can be taken.

According to this, it is possible to receive the welding bolt WB fed from the upstream side by the component receiving part 187 with a simple configuration of the guide block 140 and the air cylinder 192, so that the seating position of the welding bolt WB can be Since it is possible to stabilize the number of parts, the number of parts can be reduced and the parts can be smoothly delivered to the parts receiving section 187.

Further, the chute 120 includes a hose holder 231 as a component supply pipe arranged on the upstream side in the feeding direction of the welding bolt WB,
The component standby part 141 includes a tapered part 141a that receives the flange part WB2, and a shaft part receiving part 141b that receives the shaft part WB1,
When viewed from the rotational axis direction of the guide block 140, the guide block 140 is formed in a substantially J-shape with the tapered portion 141a side open;
The side remote from the component receiving portion 187 is formed to protrude from the tapered portion 141a, and has an auxiliary surface portion 143 that comes into contact with the welding bolt WB and assists in feeding the welding bolt WB.

According to this, the feeding can be assisted by the auxiliary surface portion 143, which leads to smooth supply of the welding bolt WB.

Further, the component standby section 141 is connected to a positive pressure means,
When the guide block 140 is in the supply position, it assists the supply of the welding bolt WB by discharging air by means of positive pressure means.

According to this, the feeding of the welding bolt WB can be assisted by discharging the air from the positive pressure means, which leads to smooth supply of the welding bolt WB.

If we consider the above idea as a parts supply unit,
A parts supply device 110;
A component supply unit 100 comprising a movable electrode side device 20 disposed on a movable electrode 16 of a resistance welding machine 10,
The movable electrode side device 20 is
The movable electrode 16 is configured to be movable within the movable electrode 16 along the axis of the movable electrode 16 by an air cylinder 45 serving as a second driving means, and to hold the welding bolt WB by suction. having a holding shaft 38 capable of
The holding shaft 38 is movable between a standby position where it waits within the movable electrode 16 and an advanced position where it protrudes from the movable electrode 16 and can suck the welding bolt WB from the component receiving part 187,
With the distal end 121 of the chute 120 in the supply state, the holding shaft 38 advances from the standby position to the advanced position to adsorb the welding bolt WB, and the distal end of the chute 120 When the part 121 is in the retracted state and the movable electrode 16 welds the welding bolt WB to the workpiece W, the holding shaft 38 moves to the standby position.

According to this, it is possible to provide a component supply unit 100 that exhibits the effects of the component supply device 110 described above.

Also, if you look at resistance welding machines,
A resistance welding machine 10 in which a welding bolt WB is held by a movable electrode 16 and welds a workpiece W and the welding bolt WB,
Comprising a parts supply unit 100,
The movable electrode side device 20 is disposed on the movable electrode 16, and the chute 120 is attached to a non-movable portion of the resistance welding machine 10.

According to this, it is possible to provide a resistance welding machine that exhibits the effects of the above-mentioned component supply device 110.

The component supply device and resistance welding machine of the present invention are not limited to the above configuration. That is, various design changes are possible without departing from the gist of the present invention.

10 Resistance welding machine 16 Movable electrode 20 Movable electrode side device 38 Holding shaft 45 Air cylinder 100 Component supply unit 110 Component supply device 120 Chute 121 Tip part 140 Guide block 141 Component standby part 141a Tapered part 141b Shaft part receiving part 143 Auxiliary surface part 170 Air chuck 180A Divided piece 180B Divided piece 187 Component receiving part 192 Air cylinder 231 Hose holder W Work WB Welding bolt WB1 Shaft part WB2 Flange part

Claims (5)

A parts feeding device that is attached to a non-moving part of a resistance welding machine that welds a workpiece and a part,
comprising a chute whose tip can be placed on the movement trajectory of the movable electrode of the resistance welding machine,
The tip portion of the chute has a component receiving portion that receives the component fed from the upstream side and enables transfer to the movable electrode, and is driven by a first driving means.
a supply state located near the movable electrode and capable of supplying the component;
a retracted state in which no interference occurs with the movable electrode;
It is configured so that it can take
The tip of the chute includes a pair of divided pieces, and the pair of divided pieces are driven by the first driving means and are configured to swing toward and away from each other,
When the pair of divided pieces are close to each other, the component receiving portion is formed and the supply state is reached;
When the pair of divided pieces are in a separated state where they are separated from each other, the split piece is configured to be in the retracted state,
The component is a welding bolt having a shaft portion and a flange portion,
the electrode on which the component is held is a movable electrode disposed on the upper side;
The chute receives the parts from above and is arranged to be inclined with respect to the vertical direction,
A guide block is rotatably disposed in the chute and has a component waiting section for waiting the components sent from above,
The guide block is driven by a third driving means, and has a component receiving position where the component can be received and a supply position where the component can be supplied to the component receiving section.
A parts supply device characterized in that it is configured to be able to take. The chute includes a component supply pipe arranged on the upstream side in the feeding direction of the components,
The component standby part includes a tapered part that receives the flange part, and a shaft part receiving part that receives the shaft part,
When viewed from the direction of the rotational axis of the guide block, the guide block is formed in a substantially J-shape with the tapered portion side open;
2. The component feeding device according to claim 1, further comprising an auxiliary surface portion that is formed so as to protrude from the tapered portion on a side remote from the component receiving portion and comes into contact with the component to assist in feeding the component. The component standby section is connected to positive pressure means,
3. The component supply device according to claim 2, wherein when the guide block is in the supply position, the positive pressure means discharges air to assist in supplying the component. The parts supply device according to claim 1;
A parts supply unit comprising: a movable electrode side device disposed on the movable electrode of the resistance welding machine,
The movable electrode side device is
The movable electrode is configured with a holding shaft that is movable in the movable electrode along the axis of the movable electrode by a second driving means and that is capable of holding the component by suction. death,
The holding shaft is movable between a standby position where it waits within the movable electrode and an advanced position where it protrudes from the movable electrode and can suck the component from the component receiving portion,
The distal end of the chute is brought into the supplying state, and the holding shaft advances from the standby position to the advanced position to adsorb the component, and the chute holds the component disposed in the component receiving portion. A component supply unit, wherein the holding shaft moves to the standby position when the distal end portion is in the retracted state and the movable electrode welds the component to the workpiece. A resistance welding machine for welding the workpiece and the component, the component being held by the movable electrode,
comprising the component supply unit according to claim 4,
A resistance welding machine, wherein the movable electrode side device is disposed on the movable electrode, and the chute is attached to the non-movable portion of the resistance welding machine.

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