JP3066505B2 - Lifting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a lifting and lowering transport device that transports a work upward.

<Conventional Technology> For example, when performing automatic machining of gears, a work is conveyed between a chamfering machine 1 and a shaving machine 2 by a conveyance chute (chute) 3 as shown in FIG. The chutes 3 are provided on the chamfering machine 1 side and the shaving machine 2 side, respectively, and a lifting / lowering transport device 4 is provided between the chutes. The work rolled on the chute 3a on the side of the chamfering machine 1 by the lifting / lowering conveying device 4
Into the side chute 3b.

The outline of the lifting and lowering transport device will be described with reference to FIGS. 11 and 12. FIG. 11 shows a schematic state of the lifting / lowering transport device, and FIG. 12 shows an operation state of the magazine.

As shown in FIG. 11, a work discharge device 5 is provided at the end of the chute 3a, and the work discharge device 5 is chamfered by the chamfering machine 1 by alternately driving two cylinders 5a and 5b. Gear (work) that has rolled 3a
6 are guided to the magazine 6 one by one.

As shown in FIG. 12, the magazine 6 is supported by an elevating device 7 that can move up and down, and is turned 180 degrees by a rotary actuator 8 provided in the elevating device 7.

As shown in FIG. 11, the base end of the chute 3b on the shaving machine 2 side is disposed at the rising end position of the magazine 6,
10 is paid out to shoot 3b. The work 6 paid out to the chute 3b rolls the chute 3b and the shaving machine 2
And shaved.

By using the above-described lifting and lowering transport device 4, the work 6 can be automatically transferred between the chutes 3a and 3b.

<Problem to be Solved by the Invention> Since the work 6 needs to be inverted by 180 degrees when the work 6 is carried into the shaving machine 2 from the chamfering machine 1, a rotary actuator 8 is provided in the conventional elevating and conveying device 4. ing. Further, an extruding cylinder 9 for discharging the work 6 to the chute 3b is provided. For this reason, a plurality of driving sources are required, and the lifting device 7 is also provided with the driving sources and the pipe wiring, so that the movable portion becomes heavy. Further, since the driving of a plurality of driving sources is combined, the operation time for transferring the work 6 is long.

<Means for Solving the Problems> According to a configuration of the present invention for solving the above problems, a work carried in from a work unloading unit of a work unloading device is positioned above the work unloading unit and from the work unloading unit. In a lifting and lowering transport device that transports a workpiece to a workpiece loading device provided with a workpiece loading portion provided in a loading direction that is horizontally rotated by a predetermined angle from the loaded loading direction, the workpiece is upwardly directed from the workpiece loading portion to the workpiece loading portion. An extended support, a rail provided on the support and extending vertically along the support, a main body supported on the rail so as to be able to move up and down, and supported rotatably on the main body and parallel to the rail. A screw shaft extending vertically, a magazine fixed to a lower end of the screw shaft, receiving the work by rotating integrally with the screw shaft, and being screwed to a shaft portion of the screw shaft; A nut member in which an ascending and descending position is determined while rotating the ascending and descending stop positions, and the nut member is provided between the nut member and the main body and biases the nut member upward with respect to the screw shaft, and A spring that holds the nut member in an ascending and stopping position with respect to the screw shaft by elastic force and regulates a rotation position of the screw shaft to hold the magazine in a direction that can face the work loading portion; A lifting cylinder having a drive rod for moving the magazine up and down between the work loading portion and the work unloading portion by being connected to the nut member and expanding and contracting, the lifting cylinder being provided on the support, The lowering position of the screw shaft is regulated by stopping the main body at the lower end stop position in the middle of the lowering movement of the nut member due to the extension operation of the nut member. A discharging direction in which the nut member is driven downward to the descent stop position with respect to the screw shaft against the urging force of the spring to rotate the screw shaft by the nut member, thereby causing the magazine to face the work discharge portion. A stopper that defines a range in which the magazine can be rotated, and a magazine that is swingably provided on the magazine, the magazine is brought into contact with the work carry-in portion by the contraction drive of the elevating cylinder, and is swung to move the work on the magazine to the work carry-in portion side. And an extruding means for extruding.

<Operation> The body is regulated by the stopper by the elevating cylinder and positioned at the lower end, and the nut member moves downward against the urging force of the spring so that the magazine can be carried into the work. When the work is carried into the magazine, the nut member is raised by driving the lifting cylinder. When the nut member rises to the rising end with respect to the screw shaft, the screw shaft rotates and the magazine is inverted without rising. When the nut member is further raised, the screw shaft and the nut member are integrated, and the main body and the magazine are raised together with the screw shaft. When the magazine rises to a predetermined position, the pushing means comes into contact with the work loading section and pushes the work in the magazine to the work loading section. The lifting cylinder is driven to move the main body to the lowermost point where the stopper is regulated by the stopper while the nut member is positioned upward by the urging force of the spring, and the magazine is lowered to the work unloading position. The member is moved downward with respect to the screw shaft, and the magazine is reversed to the original state by the rotation of the screw shaft, so that the magazine can be carried into the work.

<Embodiment> FIG. 1 shows a side view of an elevating and conveying apparatus according to an embodiment of the present invention, and FIG. 2 shows a front view thereof. The members other than the elevating / lowering transport device 11 are the same as those shown in FIG. 10, and therefore, are denoted by the same reference numerals and redundant description will be omitted.

An elevating / lowering transport device 11 is provided between the chute 3a as a work unloading section and the chute 3b as a work loading section,
A work discharge device 5 is provided at the end of the chute 3a. The work unloading device 5 includes a work presence / absence detection switch 12a for detecting the presence / absence of the work 10 in the chute 3a and a passage detection switch 12b for detecting whether or not the work 10 has passed the end of the chute 3a.

A rail extending vertically in the column 18 of the lifting and lowering device 11
A main body 14 is supported along the rail 13 so as to be able to move up and down. A magazine that holds the work 10 in the main body 14
15 is provided, and a tip of a cylinder rod 17 as a drive unit of a lifting cylinder 16 is fixed to the body 14 side. The main body 14 is driven to move up and down along the rail 13 together with the magazine 15 via the cylinder rod 17 by driving the lifting cylinder 16.

The elevating and lowering transport device 11 will be described in detail with reference to FIGS. FIG. 3 is a partially enlarged view of a part indicated by an arrow III in FIG. 1, FIG. 4 is a view taken along a line IV-IV in FIG. 3, and FIG. 5 is a view taken along a line VV in FIG. 6, FIG. 6 is a view taken along line VI-VI of FIG. 3, FIG. 7 is a view taken along line VII-VII of FIG. 3, and FIG. 8 is a view taken along line VIII-VIII of FIG. It is.

As shown, the column 18 has a vertically extending rail.
13 is attached, and the main body 14 is
Are movably supported. The lower position of the main body 14 is
The urethane stopper 18a provided on the support column 18 (third
(See FIG. 6, FIG. 6). In other words, the main body 14 comes into contact with the stopper 18a by the extension operation of the elevating cylinder 16, stops at the lower end stop position in the middle of the lowering movement, and the lowering position is regulated.

A support block 20 is fixed to the main body 14, and the support block 20
A screw shaft 21 extending vertically in parallel with the rail 13 is supported on the 20 so as to be rotatable about the vertical axis (see FIG. 4). A nut member 22 is screwed into the screw portion of the screw shaft 21, and the nut member 22
A plate 23 is integrally connected to the support block 20, and the plate 23 is slidably supported by two support shafts 24 fixed to the support block 20. The upper ends of the two support shafts 24 are the upper plate 25
The upper end of the screw shaft 21 is rotatably supported on the upper plate 25 (see FIG. 7).

The upper plate 25 has a plate 23 integrated with the nut member 22.
Upper stopper 26 that regulates the upper end position (elevation stop position)
The support block 20 is provided with a lower stopper 28 that regulates the lower end position (downward stop position) of the plate 23. A compression spring (spring) 30 is interposed between the support block 20 of the support shaft 24 and the plate 23, and the plate 23 is urged toward the upper stopper 26 (upward) (see FIGS. 3 and 4). ). The plate 23 is moved along the support shaft 24 to the upper stopper 26.
When the nut member 22 moves up and down between the lower stopper 28 and the lower stopper 28, the nut member 22 moves up and down with respect to the screw shaft 21 in a state where the rotation is restricted, and the screw shaft 21 screwed to the nut member 22 rotates around the vertical axis. .

A magazine for holding the work 10 at the lower end of the screw shaft 21
15 has been fixed. Magazine 15 has two side plates 31a and 32b
The work 10 is held between the side plates 32a and 32b (see FIGS. 3 and 6). A swing arm 434 on which the bottom of the work 10 is placed is provided below the side plates 32a and 32b.
The swing arm 34 is urged to hold the work 20 by a tension spring (spring) 36. A contact roller 38 is provided at the end of the swing arm 34 (on the side where the work 10 is carried in and out) (FIGS. 4 and 6).
See figure).

On the other hand, an elevating cylinder 16 is provided on the upper part of the column 18,
The tip of the cylinder rod 17 of the lifting cylinder 16 is a plate 23
(See FIGS. 3 and 7). Plate 23
When is located between the upper stopper 26 and the lower stopper 28 (the range of the urging force of the spring 30), the nut member 22 is raised with respect to the screw shaft 21 to rotate the screw shaft 21, and the plate 23 When the plate 23 is raised while being in contact with the upper stopper 26, the main body 14 together with the screw shaft 21 and the magazine 15 is moved to the rail 13
Rise along.

As shown in FIG. 14, when the nut member 22 is located at the lower end against the urging force of the spring 30, the rotation position of the screw shaft 21 is
When the roller 38 side of the swing arm 34 is located in the direction of the chute 3a and the nut member 22 is located at the upper end by the urging force of the spring 30, the rotation position of the screw shaft 21 is different from the above case.
The roller 38 of the swing arm 34 is turned 180 degrees
Side is located on the opposite side to the chute 3a.

FIG. 9 shows an enlarged state of the section IX in FIG. 2 when the main body 14 is raised. When the main body 14 is raised to the rising end by the driving of the lifting / lowering cylinder 16, the roller 38 of the swing arm 34 comes into contact with the chute 3b as a work loading section, and
With the rise of 14, the swing arm 34 relatively swings against the spring force of the spring 36. Thus, the work 10 held by the magazine 15 is pushed by the swing arm 34 and discharged to the chute 3b. That is, the swing arm 34 having the roller 38 is a pushing means.

Reference numeral 40 in FIG. 9 denotes a work passage detection switch for detecting the passage of the work 10. Reference numeral 24 in FIGS. 3 to 8 denotes a cylindrical cover that covers the magazine 15 and is attached to the main body 14.

 Next, the operation of the lifting and lowering transport device 11 having the above configuration will be described.

The main body 14 is moved to the stopper 18 by the extension operation of the lifting cylinder 16.
The nut member 22 is lowered to a position where the plate 23 comes into contact with the lower stopper 28 against the urging force of the spring 30. In this state, the magazine 15 is a contact roller of the swing arm 34.
38 is located on the chute 3a side, and the work 10 can be carried in from the chute 3a. When one work 10 is discharged by the work discharge device 5, the work 10 is carried into the magazine 15. When it is detected that the work 10 has passed through the end of the chute 3a and that the work 10 has been carried into the magazine 15 by the work passage detection switch 12b, the lift cylinder 16 is contracted to raise the plate 23.

Screw shaft until plate 23 contacts upper stopper 26
The nut member 22 is raised with respect to 21, the screw shaft 21 is rotated by 180 degrees with the rise of the nut member 22, and the magazine 15 is placed in a state where the contact roller 38 of the swing arm 34 is located on the opposite side of the chute 3a. Is reversed on the spot, and the magazine 15 is held in such a direction as to be able to face the work loading section. In other words, when the nut member 22 moves up and down within the range of the urging force of the spring 30, the screw shaft 21 rotates 180 degrees, and the magazine 15 is moved between the direction capable of facing the work carry-in portion and the direction capable of facing the work carry-out portion. Rotate. The screw shaft 21 and the nut member 22 are integrated with the plate 23 in contact with the upper stopper 26, and the rotation position of the screw shaft 21 is regulated.
When the magazine 23 is raised, the main body 14 moves up along the rail 13 via the rollers 19 in a state where the magazine 15 is held in a direction capable of facing the work loading section.

When the magazine 15 moves up to the side of the chute 3b, the contact roller 38 of the swing arm 34 contacts the chute 3b, and the swing arm 34 relatively swings with the contact of the magazine 15.
The work 10 held in the magazine 15 is pushed out by the chute 3b by the swing of the swing arm 34, and the work 10 is shot.
It is discharged to 3b and transported to the shaving machine 2 side.

When the work 10 passes through the chute 3b and the carry-out of the work 10 from the magazine 15 is detected by the work passage detection switch 40, the main body 14 is lowered while the plate 23 is in contact with the upper stopper 25 by the elevating cylinder 16. . When the drive of the elevating cylinder 16 is further continued after the main body 14 comes into contact with the stopper 18a, the plate 23
It descends until it comes into contact with the lower stopper 28 against the spring force of 30. As the plate 23 moves down with respect to the main body 14, the nut member 22 moves down along the screw shaft 21 to rotate the screw shaft 21 by 180 degrees. Due to the rotation of the screw shaft 21, the magazine 15 is reversed on the spot so that the contact roller 38 of the swing arm 34 is located on the chute 3a side, and the magazine 15 returns to the initial state in which the work can be carried.

By repeating the above-described operation, the work 10 that has rolled the chute 3a is turned 180 degrees and is successively carried out to the chute 3b.

Therefore, according to the elevating / lowering transport device 11 described above, the cylinder
By driving the 16, the work 10 can be inverted, transported, and unloaded.

<Effect of the Invention> The elevating and lowering transport device of the present invention rotatably supports the screw shaft on the main body whose lowering position is regulated by the stopper, and screw-engages the screw shaft with the nut member urged upward by a spring. A magazine for holding the work is provided on the screw shaft, and the nut portion is raised and lowered by the lifting cylinder, so that when the lowering position of the main body is regulated by the stopper, when the nut member moves up and down within the biasing range of the spring. The magazine can be rotated in place, and the magazine can be raised with the nut member integrated with the screw shaft outside the biasing range of the spring.
In addition, since the pushing means is provided for pushing out the work held in the magazine by contacting the work discharge guide member by raising the magazine, the work can be pushed out by raising the magazine.

As a result, the reversing, lifting and lowering, and unloading of the work can be performed by driving one lifting / lowering cylinder, the driving source, wiring, and piping can be reduced, and the weight and simplification of the movable portion (main body) can be reduced. Since there is only one source, the operation time can be reduced. It is also advantageous in terms of maintainability and appearance.

[Brief description of the drawings]

FIG. 1 is a side view of an elevating and conveying apparatus according to an embodiment of the present invention, FIG. 2 is a front view thereof, FIG. 3 is an enlarged view of an arrow III portion of FIG. 1, and FIG. IV-IV line, FIG. 5 is a line VV in FIG. 3, FIG. 6 is a line VI-VI in FIG. 3, FIG. 7 is a line VII-VII in FIG. Fig. 8 is a view taken along a line arrow.
9 is an enlarged view of an arrow IX part in FIG. 2, FIG. 10 is a plan view showing a state of conveying the work, FIG.
The figure is a schematic diagram of the lifting and lowering transport device, and FIG. 12 is an explanatory diagram of the operation state of the magazine. In the drawing, 11 is a lifting and lowering transport device, 13 is a rail, 14 is a main body, 15 is a magazine, 16 is a lifting cylinder, 17 is a cylinder rod, 21 is a screw shaft, 22 is a nut member, 30 is a compression spring (spring), 34 Is a swing arm.

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuichi Hazaki 1 Nakashinkiri, Hashime-cho, Okazaki-shi, Aichi Prefecture, Mitsubishi Okazaki Works (56) References JP-A-3-74519 (JP, A )

Claims (1)

(57) [Claims] A work carried in from a work unloading portion of a work unloading device is provided above the work unloading portion and provided in a unloading direction which is horizontally rotated by a predetermined angle from a loading direction in which the work is unloaded from the work unloading portion. In a lifting and lowering transport device that transports a work to a work loading device having a work loading portion, a column extending upward from the work loading portion toward the work loading portion, and a column provided on the column along the column. A rail extending vertically, a main body supported on the rail so as to be able to move up and down, a screw shaft rotatably supported by the main body and extending vertically in parallel with the rail, and fixed to a lower end of the screw shaft A magazine that receives the work by rotating integrally with the screw shaft; and a rising and lowering position and a lowering stop position that are screwed to the shaft portion of the screw shaft and move up and down while rotating the screw shaft. Nut member, provided between the nut member and the main body, urges the nut member upward with respect to the screw shaft, and holds the nut member with an elastic force at a rising stop position with respect to the screw shaft. A spring for restricting the rotation position of the screw shaft to hold the magazine in a direction facing the work loading portion; and a spring provided at the upper part of the support and connected to the nut member to expand and contract. An elevating cylinder having a drive rod for elevating and lowering a magazine between the work loading portion and the work unloading portion; and a main body provided on the support, wherein the main body is moved in the middle of the downward movement of the nut member by the extension operation of the elevating cylinder. By stopping at the lower end stop position on the way, the lowering position of the screw shaft is regulated, and then the nut member is moved forward with respect to the screw shaft against the urging force of the spring. A stopper that defines a range in which the screw shaft is rotated by the same nut member by lowering the screw shaft to the lowering stop position and the magazine is rotated in a discharge direction opposed to the work discharge portion; and a stopper that is swingably provided on the magazine. And an extruding means for pushing the work on the magazine toward the work loading section by swinging the magazine in contact with the work loading section by the compression drive of the lifting cylinder.