JPH044050B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is applicable to, for example, a workpiece such as a mold, a large workpiece, a workpiece pallet, etc. on a workbench of a bolster or table of a machine tool such as a press machine or a machining center. Regarding the machine tool workpiece loading/unloading device, which has a transport rail attached to one side of the workbench for loading/unloading, more specifically, the above-mentioned transport rail can be used in a horizontally protruding position and when removed. This is a technology that can prevent transport rails from falling off when in use, as well as from falling workpieces during transport, for products that can be switched to a non-use state such as a suspended or folded position. .

<Basic structure as a premise> This type of workpiece loading/unloading device eliminates the protrusion from the machine tool when it is not in use.
They are used to avoid getting in the way of workers during machining, and some have the following basic structure.

For example, Figures 1 to 6, or Figure 14, Figure 1.
As shown in FIG. 5, a usage state A is in which the transport rail 10 is supported by horizontally protruding from the workbench side L of the workbench 2 of the machine tool 1 on the workpiece loading/unloading side.
and an unused state B in which it does not protrude horizontally, and a conveyance stopper 14 is mounted on the protruding end portion 10b of the conveyance rail 10 so as to float above the conveyance surface S of the conveyance rail 10. Exported object receiving position C
and an output object passage permitting position D that is lower than the conveyance surface S, and is supported so as to be switchable and swingable in the vertical direction.

<Prior Art> In the basic structure described above, conventionally, as a structure for switching the conveyance rail 10 between the use state A and the non-use state B, the 14th structure previously proposed by the present inventor has been used.
The removable one shown in the figure (Utility Model Publication No. 58-18974),
There is a foldable type shown in Fig. 15 (Japanese Patent Publication No. 1983-6013).

The removable type shown in Figure 14 is attached to the side L of the workbench.
A usage state A in which the transport rail 10 is attached to the side surface L of the workbench by fitting and removing the base 10a of the transport rail 10 from above into the bracket 81 fixed to the bracket 81;
The device can be switched to a state in which it is removed and not in use. In addition, in usage state A, the bracket 81
Attach the pin 83 of the rail base 10a to the upper hook 82.
is inserted from above and locked, so that the receiving surface 28 of the lower part of the bracket 81 receives the receiving surface 29 of the rail base 10a.

The folding type shown in Fig. 15 has the side L of the workbench.
The base 10a of the conveyor rail 10 is pivoted to the bracket 81 for vertical movement by a pivot shaft 85, and the conveyor rail 10 is raised to a horizontal position in the use state A and folded to a hanging position. This is to switch between the transport surface B and the transport surface B. In addition, usage condition A
In this case, the lower end of a support rod 86 pivotally supported near the tip of the transport rail 10 is mounted on a support 87 fixed to the lower part of the bracket 81.

In addition, in the above basic structure, the output object stopper 14 is placed at the output object receiving position C and the output object excess tolerance position D.
Conventionally, as a structure for switching between
There is. That is, the output stopper 14 is
0, the output object receiving position C is pressed to the output object receiving position C, and by rotating the switching lever 91, the output object receiving position C is switched to the output object passage allowing position D and held there.

<Problems to be solved by the invention> The above conventional structure has the following problems.

(b) The transport rail falls off from the workbench side.

In the usage state A in which the transport rail 10 is supported in a horizontal position on the workbench 2, in the removable type shown in Fig. 14, the base end portion of the transport rail 10 may be accidentally pushed up from below due to collision with another object, etc. When an external force is applied, the pin 83 is easily lifted and lifted off the hook 82 and detached from the hook 82, so there is a risk that the conveyor rail 10 will swing forward and downward and fall off.

In addition, in the folding type shown in FIG. 15, when the support rod 86 is placed only halfway on the support 87, or when the support rod 86 is pulled out forward due to catching on another object, , the transport rail 10 swings forward and downward and falls off.

(b) The workpiece falls from the transport rail.

When replacing a workpiece such as a mold, the conveyor rail 10 is set to the operating state A, as shown in FIG. 14, and the old workpiece on the workbench 2 is taken out before a new workpiece is brought in. In this case, first, the output object stopper 1 is switched to the output object receiving position C.
4, the conveyor rail 10 receives the workpiece carried out, and then the conveyance stopper 14 is switched from the conveyance object receiving position C to the conveyance object passage permitting position D, and the workpiece is conveyed from the conveyance rail 10, and then , a new workpiece is carried in and attached to the workbench 2. During machine work, the conveyance rail 10 is switched to a non-conveyance surface that is removed from the side of the workbench so that it does not get in the way of the worker.

When the machine work is finished and the conveyor rail 10 is set in the use state A to carry out the workpiece, it is necessary to forget to return the carried-out object stopper 14 from the carried-out object passage permitting position to the carried-out object receiving position C. In this case, there is a risk that the workpiece carried out may overrun and fall from the protruding end portion 10b of the transport rail 10.

SUMMARY OF THE INVENTION The present invention has an object to prevent an accident in which a transport rail falls off during use, and to prevent an accident in which a workpiece falls during transport.

<Means for Solving the Problems> In order to achieve the above-mentioned object, the present invention, in the above-mentioned basic structure, as shown in FIGS. In addition to providing the joint support hole 23, the base 10 of the conveyance rail 10 is
A is provided with a connecting pin 31, and this connecting pin 31 is configured to be able to be freely engaged and detached from the above-mentioned pin fitting support hole 23, and an operation tool 35 for engaging and disengaging the above-mentioned connecting pin 31.
to the protruding end 10b of the above-mentioned transport rail 10,
A state in which it is supported so as to be able to swing freely in the vertical direction so as to face the delivery object stopper 14, the operating tool 35 is connected to the connecting pin 31, and the operating tool 35 is operated in a downward swinging position G. Then, the above-mentioned connecting pin 31 is fitted into the above-mentioned pin fitting support hole 23 and the above-mentioned transport rail 10 is connected.
is held in the above-mentioned usage state A, whereas when the operating tool 35 is operated to the upward swinging position H, the fitting between the above-mentioned connecting pin 31 and the above-mentioned pin-fitting support hole 23 is released. The above transport rail 10 is configured to be able to be switched to the non-use state B, and the above operation tool 35 is configured to be able to be switched to the above-mentioned object stopper 1.
4, the output object stopper 14 is configured to switch to the output object receiving position C in response to the operation tool 35 switching to the upward swinging position H. It is.

<Effect> The invention works as follows.

When the transport rail 10 is supported on the side surface L of the workbench in the horizontal use state A, the operating tool 35 is switched to the downward swinging state G. This allows the connecting pin 31 to fit into the pin fitting support hole 2 on the side surface L of the workbench.
3 to hold the transport rail 10 in the usage state A. Therefore, the transport rail 10 does not switch to the non-use state B no matter which direction it receives external force from.

Next, the transport rail 10 is brought into use state A, and after the old workpiece 5 is carried out, a new workpiece 5 is carried in. Subsequently, the tool 35 is placed in the upward swinging position H.
, the connecting pin 31 is unfitted from the pin fitting support hole 23, and then the transport rail 10 is switched from the use state A to the non-use state B.

The above-mentioned working tool 35 disengages the connecting pin 31 from the pin fitting support hole 23 and simultaneously switches the output object stopper 14 from the output object passage allowing position D to the output object receiving position C.

Therefore, when the transport rail 10 is set from the unused state B to the used state A when the workpiece 5 is replaced next time, the delivered object stopper 14 has already been switched to the delivered object receiving position C. The workpiece 5 carried out on the conveyor rail 10 is reliably caught by the carried-out object stopper 14. This prevents the workpiece 5 from overrunning and falling from the protruding end portion 10b of the transport rail 10.

<Effects of the Invention> The present invention has the following effects because it is configured and operates as described above.

(b) When the transport rail is set in use, it is held on the side of the workbench by the connection pin and the support hole for pin fitting, so even if the outside is accidentally applied from any direction, Do not fall off the workbench.

(b) When the connecting pin is unfitted from the pin fitting support hole using the operating tool in order to put the transport rail out of use after replacing the workpiece on the workbench, at the same time, The above operating tool also switches the output object stopper to the output object receiving position.
Therefore, when the transport rail is set to use for replacing a new workpiece, the workpiece stopper has already been switched to the workpiece receiving position and receives the workpiece that has been carried out. The workpiece is prevented from overrunning and falling.

(c) When the connecting pin is unfitted from the pin fitting support hole using the above operating tool, the output object stopper is switched to the output object receiving position in conjunction with this operation, so it is exclusively used for the output object stopper. The switching operation device can be omitted. Therefore, the structure of the device for switching and operating the connecting pins is simple.

<Example> Embodiments of the present invention will be described below with reference to the drawings.

1 to 6 show an embodiment of the present invention,
Fig. 1 is a vertical side view, Fig. 2 is a side view of the press machine, Fig. 3 is a perspective view, Fig. 4 is a plan view, Fig. 5 is a sectional view taken along the - line in Fig. 1, and Fig. 6 is an operation explanatory diagram.

The workpiece loading/unloading device of the present invention is used as shown in FIG. In the figure, an arrow X indicates a direction in which a mold is carried in and out of the press machine 1, and an arrow Y indicates an up and down direction of the press machine 1. A base portion 10a of a roller type conveyance rail 10 is detachably attached to a side surface L of a workbench provided on a bolster 2 of a press machine 1 on the loading/unloading side of a workpiece. When carrying in or out of the mold 5, which is a workpiece, the conveyor rail 10 is installed in the usage state A in which it protrudes horizontally, and the lift-type roller conveyor device 4 incorporated in the U groove 2a of the bolster 2 protrudes above the upper surface 2b of the bolster. do. After transporting the mold 5 from the transport rail 10 onto the roller type transport device 4, the lower mold 5a is secured to the upper surface 2b of the bolster with the clamp 6.
At the same time, by fixing the upper mold 5b to the lower surface of the slide 3 with the clamp 7, the mold 5
is attached to the press machine.

On the other hand, during press work, the transport rail 10 is removed from the side surface L of the workbench so as not to get in the way of the worker, and is switched to the unused state B. When the press work is finished and the mold 5 is to be carried out, the removed conveyor rail 10 is attached to the side surface L of the workbench and switched to the usage state A, and the conveyor rail 10 is attached to the protruding end 10b of the conveyor rail 10. The stopper 14 receives the mold 5 and prevents the mold 5 from overrunning and falling from the protruding end 10b of the conveyor rail 10.

Hereinafter, the above-mentioned removable workpiece carrying-in/out device will be explained based on FIG. 1 and FIGS. 3 to 6.

The conveyance rail 10 includes a frame-shaped rail body 12 extending in the loading/unloading direction It has an output stopper 14 provided therein. The rail main body 12 is made up of a pair of side plates 15, 15 fixed by a plurality of tie rods 16, and a conveyor roller 13 is inserted between these side plates 15, 15, and the top of the roller 13 projects above the upper surface of the side plate 15. . A conveying surface S is formed by a surface connecting the protruding ends of these conveying rollers 13.

A support metal fitting 18 constituting a side surface L of the workbench on the mold loading/unloading side is fixed to the front surface of the bolster 2 at a predetermined height via positioning pins 19 and bolts 20. This support fitting 18 has a U-shaped groove 1 when viewed from the front.
8a is formed, and a pin fitting support hole 23 extending in the lateral direction Z is formed at the upper part of both side walls 22, 22.
is penetrated. In addition, the lower wall 2 of the support fitting 18
A retainer 25 is clamped and fixed to the front surface of the retainer 4 with bolts 27 via a presser plate 26, and a retainer surface 28 is formed on the front surface of the retainer 25.

On the other hand, a receiving surface 29 is formed at the lower part of the rail base 10a of the transport rail 10 in correspondence with the receiving surface 28. In addition, the transport rail 10 is
A drop-off prevention device 8 and a drop-off prevention operating device 9 are attached to the conveyor rail 10 in order to prevent the transport rail 10 from falling off.

First, to explain the fall prevention device 8, a support metal fitting 1 is attached to the upper part of the base 10a of the conveyance rail 10.
A pin-fitting support hole 30 extending in the lateral direction Z is provided corresponding to the pin-fitting support hole 23 of No. 8. By fitting the connecting pin 31 between the supported hole 30 and the pin fitting support hole 23 in a manner that prevents it from slipping out in the carry-in/out direction X and the vertical direction Y, the pin fitting support hole 23 is fitted. A support hole 30 is supported via a connecting pin 31. This connecting pin 31 is
It is configured to be fitted and supported in the supported hole 30 and to be inserted into and removed from the pin fitting support hole 23 . Corresponding to the connecting pin 31, a pin retraction cam surface 22a and a pin receiving surface 2 are provided on each side wall 22 of the support fitting 18.
2b are formed vertically, and a falling-off prevention surface 22c is formed facing forward.

The connecting pin 31 is formed by fitting an inner cylinder 38 into an outer cylinder 37 so as to be slidable therein. The outer cylinder 37 is slidably fitted and supported in the supported hole 30, and is also slidably inserted into a cylindrical hole of a holding cylinder 39 provided between the side plates 15, 15. The connecting pin 31 is pressed toward the extension side by an extension spring 41 installed between the spring seat 40 of the inner cylinder 38 and the outer cylinder 37.

Next, the falling-off prevention operating device 9 will be explained.
An operating tool 35 is pivoted near the pivot pin 43 so as to be vertically swingable between a downward swinging position G and an upward swinging position H. Note that the downward swinging is restricted by a stopper pin 44. This operating tool 35 is interlocked and connected to the connecting pin 31 by an operating rod 45.

That is, the operating rod 45 has its right end connected to the operating tool 35 with a pin 46, and its left end connected to the connecting pin 3.
1 and is slidably supported in the insertion hole 39a of the holding cylinder 39. This operating lever 45
At the left end part, there is a retraction operation part 45a in which the connecting pin 31 is accommodated, and a drop groove 4 in which the connecting pin 31 is extended.
5b are formed in two sets in the longitudinal direction. Further, a compression spring 48 is provided that presses the operating rod 45 to the left. The compression spring 48 is mounted between a support plate 50 received on the side plate 15 by a stopper pin 49 and a spring seat 51 provided on the left side of the operating rod 45.

Further, the above-mentioned delivery stopper 14 is attached as follows.

A pivot shaft 54 extending in the transverse direction is provided on the projecting end 10b of the conveyor rail 10, and the object stopper 14 is pivotably supported on the pivot shaft 54 so as to be vertically swingable. The vertical swing beyond a predetermined amount is regulated by a restriction pin 56, and the upward swinging position is set to the delivered object receiving position C, while the downward swinging position is set to the delivered object passing permissible position D. In order to switch between these two positions, a position switching means 5 consisting of an unstable switching mechanism is provided.
7 is provided. That is, the holding pin 58 is rotatably supported at the lower end of the rail projecting end 10b.
A pressing shaft 59 is slidably inserted in the radial direction of the holding pin 58, and the pressing shaft 59 is pressed upward by a compression spring 60. This allows the upper end of the pressing shaft 59 to come into contact with the cutout groove 55 of the output stopper 14 . Further, the lower end of the pressing shaft 59 is connected to the operating tool 3.
It can be operated by a cam plate 35a provided at 5.

The above-mentioned delivery stopper 14 is shown in Fig. 6 a, b,
It operates as shown in c. That is, as shown in figure a,
When the output object stopper 14 is swung downward to the output object passage permitting position D, the pressing shaft 59 is pushed down against the compression spring 60. As the operating tool 35 is swung upward, the cam plate 35a comes into contact with the lower end of the pressing shaft 59, as shown in FIG. Add the eccentric moment of the compression spring 60 to . As a result, the object stopper 14 swings upward and switches to the object receiving position C, as shown in Figure c.

The workpiece loading/unloading device having the above configuration is switched from the unused state B to the used state A in the following procedure. As mainly shown in FIG. 3, first, the transport rail 10
Handheld parts 10c and 10c for attachment and detachment provided before and after the
While lifting with both hands, insert the connecting pin 31 from above along the pin retraction cam surface 22a of the support fitting 18. Then, the connecting pin 31 contracts against the elastic force of the extension spring 41, and the rail base 10a
(see Figure 5b). and,
The connecting pin 31 is connected to the pin receiving surface 22 of the support fitting 18.
When it comes into contact with b and faces the pin-fitting support hole 23, it is automatically expanded by the elastic force of the extension spring 41 and inserted into the pin-fitting support hole 23 (see Fig. 5a). . As a result, the pin fitting support hole 2
3 through the connecting pin 31, the supported hole 30 is supported in a fall prevention state E, and the supporting metal fitting 18
The receiving surface 29 of the conveyor rail 10 is received by the receiving surface 28 of the conveyor rail 10, and the conveyor rail 10 is supported by the supporting metal fitting 18 in a horizontally protruding use state A.

Contrary to the above, the transfer rail 10 is switched from the usage state A to the non-use state B by the following procedure. First, when the operating tool 35 is swung upward and switched to the upward swinging position H, the operating rod 45 is slid to the right against the elastic force of the compression spring 48. Accordingly, the insertion holes 37a and 38 of the outer cylinder 37 and the inner cylinder 38 are
a is drawn toward the axis of the operating rod 45, the connecting pin 31 contracts and is pulled out from the pin fitting support hole 23, and the rail switching permission state F is established. In this state, lift the transport rail 10 upwards and
It is removed from 8.

Instead of the above embodiment, the following configuration may be used.

The one in FIGS. 7 and 8 is a drop-off prevention operating device 9.
When the operating tool 35 is switched to the upward swinging position H,
Following the upward swing, the output object stopper 14 is swung upward and switched to the output object receiving position C, and the locking ball 65 attached to the conveyor rail 10 is moved upward.
By engaging with the locking hole 66 on the side surface of the output object stopper 14, the output object stopper 14 is left at the output object receiving position C. When a push-up force of more than a predetermined value is applied to the output object stopper 14, the above-mentioned engagement is released and the output object stopper 14 swings downward, and is held at the output object passage permissive position D by the elastic force of the spring 67. Ru.

The one in FIG. 9 shows each side plate 15 of the conveyor rail 10.
A corrugated washer 6 is installed between the stopper 14 and the stopper 14.
9 is installed, and its elastic force stops the conveyed object stopper 14.
is fixed in a predetermined swinging position by friction.

In the one shown in FIG. 10, a leaf spring 71 fixed to a regulating pin 56 is brought into contact with the lower swinging end of the object stopper 14, and its elastic force frictionally fixes the object stopper 14 in a predetermined swinging posture. It is something.

In the case shown in FIG. 11, when the operating tool 35 is switched to the upward swinging position H, the output object stopper 14 is swung upward via a lifting tool 73 made of a flexible wire, a chain, etc., and the above-mentioned waveform is Watshiya 6
The delivered object stopper 14 is held at the delivered object receiving position C with an elastic force of 9 (see FIG. 9).

In the one shown in FIG. 12, the delivery stopper 14 is modified as follows. That is, the object stopper 14, which is pivotally supported on the projecting end 10b of the conveyance rail 10 so as to be able to swing up and down, is retracted to the object passage permitting position D via the cam 75 by the switching operation of the switching lever 74. The operating tool 35 of the drop-off prevention operating device 9 and the switching lever 74 are connected by a pulling tool 73 made of a flexible wire, chain, etc.
When switching the operating tool 35 to the upward swinging posture H, the lifting tool 73 moves to the switching lever 74 as the operating tool 35 swings upward.
7 and rotate the material stopper 14 downward.
It is designed to swing upward with a tension of 6 and switch to the conveyed object receiving position C.

In the one shown in FIG. 13, the transport rail 10 is constructed in a foldable manner and can be switched between a horizontally protruding position (solid line) in use state A and a hanging position (double-dashed line) in non-use state B (double-dashed line). It is. Falling prevention operating device 8
The drop-off prevention operating device 9 is constructed similarly to that shown in FIG. When switching from the use state A to the non-use state B, first press the connecting pin 3 with the operating tool 35.
1 is contracted, and in that state, the elongated hole 7 of the support fitting 18 is
The transport rail 10 is lifted along the line 8, and then the transport rail 10 is folded down using the hanging pin 79 as a fulcrum. Note that switching from non-use state B to use state A is performed by the reverse procedure to the above.

[Brief explanation of drawings]

1 to 13 show embodiments of the present invention,
Figures 1 to 6 show an example of the embodiment. Figure 1 is a longitudinal side view, Figure 2 is a side view of the press machine, Figure 3 is a perspective view, Figure 4 is a plan view, and Figure 5 is a side view of the press machine. 1, FIG. 5a is a diagram showing the falling-off prevention state, FIG. 5b is a diagram showing the rail switching permissible state, and FIG. 6 is an explanatory diagram of the operation of the conveyed object stopper.
Fig. 6a is a diagram showing the output object passing permissible position, Fig. 6b is a diagram showing the state in the middle of switching, Fig. 6c is a diagram showing the output object receiving position, and Fig. 7 and Fig. 8 are FIG. 7 is a vertical cross-sectional view of a main part, FIG. 8 is a cross-sectional view taken along the - line in FIG. 7, and FIGS. 9 to 13 each show another example. , FIG. 9 is a partial plan view, FIG. 10 is a vertical sectional view of the main part, and
1 is a diagram corresponding to FIG. 7, FIGS. 12 and 13 are diagrams corresponding to FIG. 1, and FIGS. 14 and 15 are diagrams corresponding to FIG. 1, respectively, showing a conventional example. DESCRIPTION OF SYMBOLS 1...Machine tool (press machine), 2...Workbench (bolster), 10...Transportation rail, 10a...Base, 10b...Protruding end, 14...Transported object stopper, 23...For pin fitting Support hole, 31...Connecting pin, 35...Operation tool, A...Using condition, B...
Not in use, C...Output receiving position, D...Output passing permissible position, G...Downward swinging posture, H...
Upward swinging posture, L... side of workbench (support bracket 1
8), S... Conveyance surface.

Claims (1)

[Scope of Claims] 1. Usage state A in which the transport rail 10 is supported by horizontally protruding from the workbench side L of the workbench 2 of the machine tool 1 on the workpiece loading/unloading side.
and an unused state B in which it does not protrude horizontally, and a conveyance stopper 14 is mounted on the protruding end portion 10b of the conveyance rail 10 so as to float above the conveyance surface S of the conveyance rail 10. Exported object receiving position C
and a workpiece passage permissible position D that sinks below the conveyance surface S, and is supported so as to be able to switch and swing in the vertical direction. In addition to providing the support hole 23 for pin fitting, the base 10 of the above-mentioned conveyance rail 10
A is provided with a connecting pin 31, and this connecting pin 31 is configured to be able to be freely engaged and detached from the above-mentioned pin fitting support hole 23, and an operation tool 35 for engaging and disengaging the above-mentioned connecting pin 31.
to the protruding end 10b of the above-mentioned transport rail 10,
A state in which it is supported so as to be able to swing freely in the vertical direction so as to face the delivery object stopper 14, the operating tool 35 is connected to the connecting pin 31, and the operating tool 35 is operated in a downward swinging position G. Then, the above-mentioned connecting pin 31 is fitted into the above-mentioned pin fitting support hole 23 and the above-mentioned transport rail 10 is connected.
is held in the above-mentioned usage state A, whereas when the operating tool 35 is operated to the upward swinging position H, the fitting between the above-mentioned connecting pin 31 and the above-mentioned pin-fitting support hole 23 is released. The above transport rail 10 is configured to be able to be switched to the non-use state B, and the above operation tool 35 is configured to be able to be switched to the above-mentioned object stopper 1.
4, the output object stopper 14 is configured to switch to the output object receiving position C in response to the operation tool 35 switching to the upward swinging position H. A workpiece loading/unloading device for a machine tool, which is characterized by: