JP2014030834A - Electric riveter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric riveter capable of receiving a cut spindle in a storage case by preventing a reverse flow.SOLUTION: An electric riveter 1 is configured to hammer rivets each having a spindle 82 inserted into the center hole of a rivet body into through-holes of a plurality of stacked objects. The electric riveter 1 comprises: a body part 2; a main spindle 4 disposed to be rotatable with respect to the body part 2 and configured to cut the spindle 82 by pulling a rivet 8 into an insertion hole 41; and a storage case 5 disposed below the main spindle 4 and configured to receive the spindle 82. In the body 2, a slit 42 is formed to guide the cut spindle 82 from the insertion hole 41 into the storage case 5. In the storage case 5, a baffle plate 51 is disposed to prevent the cut spindle 82 from reverse-flowing into the slit 42.

Description

  The present invention relates to an electric riveter for driving a rivet.

  In the process of assembling parts in the factory, a rivet with a mandrel with a head inserted in the center hole of a ring-shaped rivet body with a flange is used to join the steel plates together Has been. Further, the mandrel is inserted into the center hole of the rivet body with its head portion disposed on the opposite side of the flange. Then, the rivet body is inserted into a rivet hole formed continuously in a plurality of steel plates, and the mandrel is pulled to the opposite side of the head. At this time, the diameter of the rivet body is expanded so as to be crushed by the head, and a plurality of steel plates are sandwiched between the expanded diameter portion and the flange, and at the same time, the mandrel is cut. This rivet is driven to a plurality of steel plates using a pneumatic or electric riveter.

  For example, Patent Document 1 describes a rivet device provided with a rivet collection compartment having a discharge opening. In this rivet device, the discharge opening of the rivet collecting compartment can be closed by the cover. Then, the rivet pin after the rivet driving is finished is accommodated in the rivet collecting compartment. This rivet device includes a power supply unit, and operates by driving a transmission device and a crank mechanism by an electric motor.

Japanese Patent Laid-Open No. 11-290983

  However, an operator who operates a rivet device (riveter) may turn the rivet device in various directions depending on the location where the rivet is to be struck. At this time, the mandrel after cutting accommodated in the rivet collecting compartment may flow back into the main body of the rivet device.

  The present invention has been made in view of such a background, and has been obtained in an attempt to provide an electric riveter that can accommodate a cut mandrel in a housing case while preventing backflow.

One aspect of the present invention is an electric motor configured to strike a rivet in a state where a mandrel having a head is inserted into a center hole of a ring-shaped rivet body having a flange, into a plurality of through-holes of a plurality of objects overlapping each other. A riveter,
A main body where an electric motor is disposed;
An insertion hole that is rotatably arranged with respect to the main body and into which the mandrel in the rivet is inserted, receives the rotation by the electric motor, draws the rivet into the insertion hole, and cuts the mandrel. A spindle for
A housing case that is provided below the main shaft and houses the cut mandrel;
The main body is formed with a slit for guiding the cut mandrel from the insertion hole into the housing case,
A baffle plate is provided in the housing case so as to prevent the cut mandrel from flowing back into the slit (Claim 1).

The electric riveter is configured to accommodate the cut mandrel in the accommodation case, and is designed to prevent the mandrel that has entered the accommodation case from flowing back to the main shaft side.
Specifically, the main body is formed with a slit for guiding the cut mandrel from the insertion hole into the housing case. Thereby, when a rivet is hit | damaged to the target object, the cut mandrel falls in a storage case from a slit. The cut mandrel can be held in the housing case.

A baffle plate is provided in the housing case to prevent the cut mandrel from flowing back to the slit. Thereby, even if an operator inclines the electric riveter in various directions, the baffle plate can block the mandrel once dropped into the housing case from flowing back into the slit.
Therefore, in the electric riveter, the cut mandrel can be housed in the housing case while preventing backflow.

The whole figure which shows the electric riveter concerning an Example. Cross-sectional explanatory drawing which shows simply the electric riveter of the state before hitting a rivet to a steel plate concerning an Example. Cross-sectional explanatory drawing which shows simply the electric riveter of the state which hit | damaged the rivet to the steel plate concerning an Example. Cross-sectional explanatory drawing which shows the electric riveter concerning an Example by the AA arrow line in FIG. Explanatory drawing which shows the rivet concerning an Example.

A preferred embodiment of the above-described electric riveter will be described.
In the electric riveter, a discharge passage communicating with the slit and a storage portion whose volume is larger than that of the discharge passage are formed in the storage case by the arrangement of the baffle plates. The passage may be provided with a backflow prevention valve that allows the mandrel to descend from the slit to the housing portion, but disables the backflow of the mandrel from the housing portion to the slit. Item 2).
In this case, it is possible to prevent the cut mandrel from flowing backward from the housing portion to the slit by the backflow prevention valve provided in the discharge passage.

Further, the housing case may be detachable from the main body portion in order to discard the cut mandrel to the outside (Claim 3).
In this case, when the housing case is removed from the electric riveter, a plurality of cut mandrels housed in the housing case can be discarded to the outside.

Hereinafter, embodiments of the electric riveter will be described with reference to the drawings.
As shown in FIG. 5, the electric riveter 1 of this example includes a plurality of rivets 8 in a state where a mandrel 82 having a head 822 is inserted into a center hole 813 of a ring-shaped rivet body 81 having a flange 812. It is comprised so that it may hit against the through-hole 71 of the target object.
As shown in FIG. 1, the electric riveter 1 is provided with a main body portion 2 in which an electric motor 3 is disposed, a main shaft 4 that is rotatably arranged with respect to the main body portion 2, and a lower portion than the main shaft 4. And a housing case 5 for housing the mandrel 82.
2 to 4, the main shaft 4 has an insertion hole 41 into which the mandrel 82 in the rivet 8 is inserted, and the mandrel 82 is cut by receiving the rotation by the electric motor 3 and drawing the rivet 8 into the insertion hole 41. It is a part to do. The main body 2 is formed with a slit 42 that guides the cut mandrel 82 from the insertion hole 41 into the housing case 5. A baffle plate 51 is provided in the housing case 5 to prevent the cut mandrel 82 from flowing back into the slit 42.

Hereinafter, the electric riveter 1 of this example will be described in detail with reference to FIGS.
The electric riveter 1 of this example performs driving of the rivet 8 electrically by manual operation by an operator.
As shown in FIG. 5, the objects to be joined by the rivets 8 are two steel plates 7, and through holes 71 are formed in the two steel plates 7 at positions where they are in communication with each other on the mating surfaces. . In the figure, the rivet 8 with the mandrel 82 cut is shown by a solid line, and the initial state of the rivet 8 before the mandrel 82 is cut is shown by a two-dot chain line.
The rivet 8 is a combination of a rivet body 81 and a mandrel 82 to join two steel plates 7 together. The rivet body 81 has a flange 812 at one end of the cylindrical portion 811, and the mandrel 82 has a head 822 having an enlarged diameter at one end of the shaft portion 821.

  When the rivet 8 is driven, a rivet body 81 in which a mandrel 82 is disposed is inserted and disposed in the through holes 71 of the two steel plates 7. Then, the shaft portion 821 of the mandrel 82 is pulled by the electric riveter 1 and the head portion 822 is deformed so as to expand the diameter of the cylindrical portion 811 of the rivet body 81, so that the flange 812 and the expanded diameter portion 814 of the cylindrical portion 811 Two steel plates 7 can be sandwiched between them. Further, when the electric riveter 1 retracts the shaft portion 821 of the mandrel 82, the shaft portion 821 is cut (broken), and the cut mandrel 82 is housed in the housing case 5 of the electric riveter 1.

  As shown in FIGS. 1 and 2, the main body 2 of the electric riveter 1 accommodates the electric motor 3, a power transmission unit (not shown) that transmits the power of the electric motor 3 to the main shaft 4, the main shaft 4 that draws the mandrel 82, and the like. It is configured to The main shaft 4 is rotatably supported in a head case 21 formed in the main body 2, and is configured to grip and pull the mandrel 82 by a plurality of parts that operate by receiving the power of the electric motor 3. Yes. In addition, the main body 2 is formed with a grip portion 22 for the operator to grip.

As shown in FIG. 2, the main shaft 4 includes a jaw 43 that grips the mandrel 82 in the gripping hole 431, a screw 44 having a central hole 441 that is concentrically arranged on the rear side of the jaw 43 and communicates with the gripping hole 431, It includes a guide 45 that holds 43 inside, a jaw 43, a screw 44, a spring 46 that urges the guide 45 toward the tip end, and a nut 47 that pulls the screw 44 under the power of the electric motor 3.
The insertion hole 41 of the main shaft 4 in this example is constituted by a gripping hole 431 of the jaw 43 and a center hole 441 of the screw 44. The slit 42 in this example is provided below the screw 44.

  As shown in FIG. 3, when the mandrel 82 is inserted into the jaw 43 to operate the electric motor 3, the screw 44 is rotated by the nut 47 that receives the power of the electric motor 3, and the rear side of the main body 2. Be drawn. The jaw 43 and the guide 45 are pulled together with the screw 44 against the urging force of the spring 46, and the mandrel 82 held by the jaw 43 can be pulled and cut. Further, the cut mandrel 82 falls into the housing case 5 from the slit 42 provided behind the screw 44 in the main body 2.

As shown in FIG. 3, a discharge passage 53 communicated with the slit 42 and the insertion hole 41 and a storage portion 52 whose volume is larger than that of the discharge passage 53 are formed in the storage case 5 due to the arrangement of the baffle plate 51. Has been.
The baffle plate 51 is provided in the housing case 5 along the axial direction of the main shaft 4, and forms a discharge passage 53 extending in the vertical direction on one side in the left-right direction including the lower opening 421 of the slit 42. . The discharge passage 53 is formed from the central position in the left-right direction where the slit 42 is formed toward one side of the housing case 5. The discharge passage 53 is formed so as to guide the flow of the mandrel 82 by an inclined surface provided in the baffle plate 51.

Further, the discharge passage 53 is provided with a backflow prevention valve 54 that allows the mandrel 82 to descend from the slit 42 to the accommodating portion 52 while disabling the mandrel 82 from the accommodating portion 52 to the slit 42. Yes. The backflow prevention valve 54 is formed so that the discharge passage 53 can be opened and closed.
The backflow prevention valve 54 has a rotating shaft 541 at its upper end, and is formed of a plate member that is rotatable around the rotating shaft 541 and hangs down under its own weight in a natural state. The backflow prevention valve 54 can be rotated outward in the left-right direction, which is one direction, when the mandrel 82 descending from the slit 42 contacts (collises). Thereby, the mandrel 82 descending from the slit 42 can be smoothly guided to the accommodating portion 52 via the discharge passage 53.

On the other hand, when the mandrel 82 abuts from the lower end outlet portion of the discharge passage 53, the backflow prevention valve 54 cannot be turned inward in the left-right direction, which is the other direction, because it hangs down by its own weight. Thereby, it is possible to prevent the mandrel 82 accommodated in the accommodating part 52 from flowing back to the slit 42, and the discharge of the mandrel 82 from the slit 42 into the accommodating case 5 can be continued smoothly.
Further, the backflow prevention valve 54 can be biased toward the closing side of the discharge passage 3 by a weak spring or the like.

  Further, as shown in the figure, the housing case 5 is detachable from the main body 2 in order to discard the cut mandrel 82 to the outside. An engaging claw 55 that is elastically deformable so as to be attached to and detached from the main body 2 is formed at the top of the housing case 5. The housing case 5 is attached to the main body 2 by the engaging claw 55. When the housing case 5 is removed from the main body 2, the plurality of cut mandrels 82 housed in the housing case 5 can be discarded to the outside.

The electric riveter 1 of this example is configured to accommodate the cut mandrel 82 in the accommodation case 5, and is devised so that the mandrel 82 contained in the accommodation case 5 does not flow backward to the main shaft 4 side.
Specifically, a slit 42 that guides the cut mandrel 82 from the insertion hole 41 into the housing case 5 is formed in the main body 2. Thereby, when the rivet 8 is struck against the object, the cut mandrel 82 falls from the slit 42 into the housing case 5. The cut mandrel 82 can be held in the housing case 5.

In the housing case 5, a baffle plate 51 and a backflow prevention valve 54 are provided to prevent the cut mandrel 82 from flowing back to the slit 42. Thereby, even if the operator tilts the electric riveter 1 in various directions, the baffle plate 51 and the backflow prevention valve 54 prevent the mandrel 82 once dropped into the housing case 5 from flowing back to the slit 42. be able to.
Therefore, in the electric riveter 1 of this example, the mandrel 82 after cutting can be accommodated in the accommodating case 5 while preventing backflow.

DESCRIPTION OF SYMBOLS 1 Electric riveter 2 Main body part 4 Main shaft 41 Insertion hole 42 Slit 5 Housing case 51 Baffle plate 52 Housing part 53 Discharge passage 54 Backflow prevention valve 55 Engaging claw 7 Steel plate 8 Rivet 81 Rivet body 82 Mandrel

Claims (3)

An electric riveter configured to strike a rivet in a state where a mandrel having a head is inserted into a center hole of a ring-shaped rivet body having a flange, into through holes of a plurality of objects overlapping each other,
A main body where an electric motor is disposed;
An insertion hole that is rotatably arranged with respect to the main body and into which the mandrel in the rivet is inserted, receives the rotation by the electric motor, draws the rivet into the insertion hole, and cuts the mandrel. A spindle for
A housing case that is provided below the main shaft and houses the cut mandrel;
The main body is formed with a slit for guiding the cut mandrel from the insertion hole into the housing case,
An electric riveter characterized in that a baffle plate for preventing the cut mandrel from flowing back into the slit is provided in the housing case. The electric riveter according to claim 1, wherein a discharge passage communicating with the slit and a storage portion whose volume is larger than the discharge passage are formed in the storage case by the arrangement of the baffle plates. And
The discharge passage is provided with a backflow prevention valve that allows the mandrel to descend from the slit to the housing portion, but disables the backflow of the mandrel from the housing portion to the slit. Features an electric riveter.   3. The electric riveter according to claim 1, wherein the housing case is detachable from the main body in order to discard the cut mandrel to the outside.

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