JPH0810530Y2 - Positioning stop device for dolly replacement carts - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to, for example, an exchange trolley used for exchanging a mold of an injection molding machine, which is mounted on a pair of front and rear rails attached to the front side of the machine such as the injection molding machine. The present invention relates to a device for positioning and stopping an exchange cart such as a mold.

[0002]

2. Description of the Related Art As a positioning stopping device of this type, there is a conventional technique disclosed in Japanese Utility Model Publication No. 1-23634. The exchange trolley includes flat wheels mounted on the front rails, both collar wheels mounted on the rear rails, and a positioning operation device. The locking pin of the positioning operation device is provided on the front part of the exchange cart, and the positioning locking plate is directly fixed to the side surface of the front rail by welding, and the locking hole is provided in the locking plate. The structure is such that the above locking pin is fitted. Further, as shown in FIG. 7 of the above publication, the above-mentioned locking hole is formed straight in the vertical direction, and the straight portion of the locking pin is fitted into the straight locking hole. It has become. In addition, a tapered portion for guiding at the start of fitting is provided below the locking pin. Then, by inserting the straight part of the above-mentioned locking pin into the locking hole, the carriage is stopped at a predetermined position on the rail, and the die delivery port arranged at the rear part of the carriage and the front of the injection molding machine. The mold is exchanged with the mold delivery port arranged in the section.

In the above-mentioned conventional technique, the exchanging truck that is running stops as follows. When the locking pin is inserted into the locking hole, the exchange cart first swivels around the locking pin at the front part by its traveling inertial force, and then the swivel motion is performed through the brim parts of both collar wheels. It catches on the side of the rear rail and stops at the catch turning position.

[0004]

By the way, when the fitting gap between the locking pin and the locking hole is large, the positioning stop accuracy of the carriage with respect to the rail is deteriorated, and the metal mounted on the carriage is deteriorated. It is not possible to deliver the load such as molds to the injection molding machine accurately. If the fitting gap is reduced to solve this problem, the following problem will occur. That is, when positioning of the carriage is stopped, the locking pin is fitted into the straight locking hole of the locking plate fixed to the rail, and therefore, when the fitting position of the locking pin into the locking hole is slightly displaced. The tip of the engaging pin is fitted into the engaging plate while colliding with the engaging plate. Therefore, the impact at the time of fitting is large, and the above-mentioned locking pin or locking plate is easily damaged. Also,
When the fitting is completed, the straight part of the locking pin is fitted into the straight locking hole, so that the locking pin is pressed against the peripheral surface of the locking hole in the vertical direction for a long time. It will be accepted in the state of being. Therefore, when the locking pin is pulled out, the operation force required for the pulling out becomes large, and it is necessary to raise the locking pin greatly in order to release the fitting. Therefore, the operation force and the operation stroke of the means for moving up and down the locking pin are increased. As a result, the lifting means becomes large and heavy. Further, the above conventional structure has another problem as follows. That is, when the locking plate is fixed to the side surface of the rail, the locking plate is directly fixed by welding, so the welding causes the locking plate to be distorted or tilted. Therefore, in order to insert the locking pin into the locking hole of the locking plate, it is necessary to increase the hole diameter of the locking hole. As a result, as described above, the fitting gap between the locking pin and the locking hole becomes large, and the positioning stop accuracy of the carriage deteriorates. Furthermore, the above conventional structure has another problem as described below. Since the exchanging cart swivels around the front locking pin, the swivel radius of the rear die transfer port is large. For this reason, the mold delivery port of the exchange cart has a large turning length,
The displacement of the injection molding machine with respect to the die delivery port is large. As a result, the mold and the like cannot be delivered to the injection molding machine accurately. Further, since the positioning locking hole arranged on the front side of the front rail has a large distance from the rear rail, it takes a lot of time and labor to align the center. An object of the present invention is to reduce the impact when the positioning pin is fitted, and to make the means for moving the pin up and down small and lightweight. Another object of the present invention is to improve the positioning stop accuracy of the carriage. Still another object of the present invention is to prevent a mistake in delivery of a load such as a mold due to turning displacement of a carriage, and to facilitate alignment of positioning holes.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention comprises a stop positioning device for an exchange cart as follows, as shown in FIGS. 1 to 4, for example. (Invention of Claim 1) An exchange cart 6 is mounted on a pair of front and rear rails 3 and 4 provided on the floor surface 2.
Movably mounted on the exchange carriage 6 and the positioning pin 1
0 is supported so that it can move up and down, and its positioning pin 1
In a positioning stop device for an exchange dolly such as a mold in which a positioning plate 13 that receives 0 is supported on the floor surface 2, a hole member 15 into which the positioning pin 10 is fitted, and a hole member 15 in which the positioning pin 10 is fitted. A cushion member 14 for supporting the hole member 15 so as to be elastically displaceable at least in the lengthwise direction of the rails 3 and 4 is provided, and the positioning hole 11 provided in the hole member 15 is provided with a tapered bottom hole portion. At the same time, the positioning pin 10 is provided with a tapered portion that fits into the tapered hole portion from above.

(Invention of Claim 2) In the above-mentioned configuration of Claim 1, the following configuration is made.
A supporting member 51 was fixed to at least one of the rail 4 (3) and the floor surface 2, and the positioning plate 13 was attached to the supporting member 51.

(Invention of Claim 3) In the above-mentioned constitution of Claim 1 or 2, the following constitution is made. The positioning pin 10 is provided on the rear side R of the exchange cart 6, the positioning plate 13 is arranged on the rear side R of the rear rail 4, and both the collar wheels 8 of the exchange cart 6 are arranged. The flat wheels 7 of the above-mentioned exchange truck 6 are mounted on the rear rail 4 and the front rail 3 described above.

[0008]

The present invention is, for example, as shown in FIGS.
It works as follows. (Invention of Claim 1) When the positioning pin 10 is fitted into the positioning hole 11 when the exchanging carriage 6 is stopped at a predetermined position on the rails 3 and 4, the hole member 15 is cushioned by the fitting resistance due to the fitting resistance. Alignment is automatically activated via 14. For this reason, the fitting resistance at the time of fitting the pin can be reduced, and the shock at the fitting of the pin can be buffered by the cushion member 14. Further, since the positioning pin 10 is taper-fitted from the upper side with respect to the lower recessed tapered hole portion of the positioning hole 11, a draft is formed in the ascending direction of the positioning pin 10. Therefore, when the positioning pin 10 is pulled out, the operation force required for the pulling out is small, and the fitting can be released by slightly raising the positioning pin 10. Therefore,
The operation force and operation stroke of the means 50 for raising and lowering the positioning pin 10 may be small. As a result, the elevating means 50 can be made small and lightweight. (Invention of Claim 2) The structure of claim 2 basically operates in the same manner as the structure of claim 1, but further operates as follows. Since it is not necessary to directly weld and fix the positioning plate 13 to the rail 4 (3), the rail 4 (3) and the positioning plate 1
It is possible to accurately adjust the mounting position relative to 3. As a result, the fitting gap between the positioning pin 10 supported by the exchange cart 6 on the rail and the positioning hole 11 of the positioning plate 13 can be reduced. As a result, the positioning stop accuracy of the exchange cart 6 is improved. (Invention of Claim 3) The structure of claim 3 basically operates in the same manner as the structure of claim 1, but further operates as follows. When stopping the exchanging cart 6 that is running, the positioning pin 10
When the operation is inserted into the positioning hole 11, the exchange cart 6 tries to turn around the positioning pin 10 by the traveling inertia force, as in the above-mentioned conventional example. However, since the positioning pin 10 is arranged in the rear part of the exchange carriage 6 and the positioning hole 11 is arranged in the rear side of the rear rail 4, the mold delivery port 6a in the rear part of the exchange carriage 6 has a small turning radius. The turning length is also reduced. As a result, the positional deviation between the mold delivery port 6a of the exchange cart 6 and the mold delivery port 1a of the injection molding machine 1 can be small, and the mold 5 can be delivered to the injection molding machine 1 accurately. Further, since the positioning hole 11 is arranged near the rear rail 4, the distance from the rear rail 11 is small and the work of centering is easy.

[0009]

The present invention has the following effects because it is constructed and operates as described above. (Invention of Claim 1) When the positioning pin is fitted into the positioning hole, the hole member is automatically aligned via the cushion member to reduce the fitting resistance when the pin is fitted, and at the time of fitting the pin. Since the shock can be absorbed by the cushion member, the durability of the positioning operation device can be improved. Furthermore, since the above-mentioned positioning pin is taper-fitted into the above-mentioned positioning hole from the upper side, the operation force required for extracting the above-mentioned positioning pin is small, and the positioning pin can be fitted slightly by raising it. Can be released. For this reason, the positioning pin elevating means requires only a small operation force and operation stroke, and can be made compact and lightweight.

(Claim 2) Since the relative mounting positions of the rail and the positioning plate can be adjusted accurately, the positioning pin supported by the exchange carriage on the rail and the positioning plate can be positioned. The fitting gap with the hole can be reduced. As a result, the positioning stop accuracy of the exchange cart is improved, and the load such as the mold placed on the exchange cart can be accurately delivered.

(Device of claim 3) Since the positioning pin is arranged at the rear part of the exchange carriage and the positioning hole is arranged at the rear side of the rear rail, when the exchange carriage is stopped, the mold of the rear portion of the exchange carriage, etc. The turning length of the delivery port is reduced. Therefore, the displacement between the delivery ports of the machine for exchanging the mold or the like and the exchanging carriage can be small, and the mold or the like can be accurately delivered. Further, since the positioning hole is arranged near the rear rail, the distance from the rear rail can be small and the centering work can be performed efficiently. Moreover, as described above, since the turning length of the exchanging cart is small, the impact of both flange wheels on the rear rail is small, and the life of these rear rail and both flange wheels is extended.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. First, the overall structure will be described with reference to FIGS. 2 is a plan view of the exchange cart, FIG. 1 is a sectional view taken along the line II of FIG. 2, and FIG.
FIG. 3 is a sectional view taken along the line III-III of FIG. The front and rear rails 3 and 4 are provided in a pair of front and rear rail pits 21 and 22 (see FIG. 1) formed by recessing the floor surface 2 on the front side F of the injection molding machine (machine) 1. A mold exchanging carriage 6 is movably mounted on the front and rear rails 3 and 4, and the mold 5 is transferred between the exchanging carriage 6 and the injection molding machine 1.

That is, a mold loading consisting of a long roller conveying device 26 and a short roller device 27 is provided on the upper part of the exchange carriage 6 corresponding to the pair of roller conveying devices 24 protruding from the injection molding machine 1 to the front side F. Two parts 28 are provided. A push / pull drive device 29 is provided on each mold loading portion 28 between the roller transport devices 26 and 27. This push-pull drive device 29
Includes a push-pull guide rail 31 extending in the front-rear direction, a push-pull base 32 inserted in the guide rail 31, and an electric chain drive means 33 for reciprocally driving the push-pull base 32 in the front-rear direction. The injection molding machine 1 is also provided with a push-pull guide rail 35 so as to face the push-pull guide rail 31 of the exchange cart 6.

As shown in FIG. 1, with the swinging hook 37 of the push / pull base 32 engaged with the locking fitting 5a of the die 5, the push / pull base 32 is pushed and pulled by the chain drive means 33. By driving, the mold 5 moves the roller carrier devices 26 and 27 of the exchange carriage 6 and the roller carrier device 2 of the injection molding machine 1.
4 is driven by pushing and pulling.

At the lower part of the exchange cart 6, three axles 39 extending in the front-rear direction are arranged. Flat wheels 7 mounted on the front rail 3 and two brim wheels 8 mounted on the rear rail 4 are provided at front and rear ends of each axle 39, respectively. Of the three axles 39, the rightmost axle 39 in FIG. 3 is driven by a traveling motor 41, which is a geared motor with a brake, via a chain transmission means 40. Electric power is externally supplied to the traveling motor 41, the electric chain drive means 33, and the compressor 42 via an auto reel 43. An automatic reel groove 44 is formed on the floor surface 2 between the front and rear rails 3 and 4. Further, the exchange cart 6 includes a control panel 4 on the left side in FIGS. 2 and 3.
5 and an operation panel 46 are provided.

A positioning operation device 9 is provided below the rear side R of the exchange cart 6. Corresponding to the positioning device 9, a positioning hole 11 is arranged on the rear surface 4 of the rear rail 4 on the floor surface 2. The positioning pin 10 of the positioning operation device 9 is fitted into the positioning hole 11 so that the exchange cart 6 is accurately positioned and stopped on the front and rear rails 3 and 4.

The above positioning operation device 9 and the positioning hole 1
The structure of No. 1 will be described with reference to FIG. Incidentally, FIG. 4 shows IV- of FIG.
FIG. 4 is a sectional view taken along the line IV. The positioning operation device 9 is configured such that the positioning pin 10 inserted in the guide cylinder 49 can be moved vertically by a pneumatic cylinder 50 that is an elevating means. The pneumatic cylinder 50 is connected to the compressor 42.

On the other hand, the rail base 12 is fixed to the bottom surface of the rear rail pit 22, the support member 51 on the rail base 12 is fixed to the rear rail 4, and the rear side of the rear rail 4 is fixed. The above-mentioned support member 51 in the R position
The positioning plate 13 extending in the rail direction is mounted and fixed on the rail.
A cylindrical hole member 15 is elastically displaceably supported by the positioning plate 13 via a cylindrical cushion member 14.
The cylindrical hole of the hole member 15 constitutes the positioning hole 11. The hole member 15 may be elastically displaceable at least in the length direction of the rear rail 4.

The fact that the exchange cart 6 has reached the stop position means that the limit switch 5 fixed to the lower portion of the guide tube 49
The second contact 52a is a cam plate 53 fixed to the rear rail 4.
Is detected by being activated by. The front and rear rail pits 21 and 22 are backfilled to almost the same plane as the floor surface 2 (see the chain double-dashed lines in FIGS. 1 and 4).

When the exchanging truck 6 is stopped,
First, the traveling motor 41 is decelerated to reduce the traveling speed of the exchange cart 6, and then the positioning pin 10 is inserted into the positioning hole 11. Then, the exchange cart 6 tries to turn around the positioning pin 10 due to its traveling inertial force, but the turning movement is received by the rear rail 4 via both the collar wheels 8. Since the positioning pin 10 is arranged at the rear part of the exchange carriage 6 and the positioning hole 11 is arranged at the rear side of the rear rail 4, the mold delivery port 6a at the rear part of the exchange carriage 6 has a small turning radius and a long turning length. It also becomes smaller. Therefore, the mold delivery port 6a of the exchange cart 6
The positional deviation between the mold and the mold delivery port 1a of the injection molding machine 1 is small, and the mold 5 can be accurately delivered to the injection molding machine 1.

Further, the guide rail 3 for pushing and pulling the exchange cart 6 is provided.
1 and the push-pull guide rail 35 of the injection molding machine 1 also have a small positional deviation, so that the push-pull base 32 can be smoothly moved over these guide rails 31 and 35. Therefore, the chain driving means 33 can be manufactured in a small size because the driving force is small.

[Brief description of drawings]

FIG. 1 is a sectional view taken along the line I-I of FIG.

FIG. 2 is a plan view of an exchange cart.

FIG. 3 is a sectional view taken along the line III-III of FIG.

FIG. 4 is a sectional view taken along the line IV-IV of FIG.

[Explanation of symbols]

2 ... Floor surface, 3 ... Front rail, 4 ... Rear rail, 6 ... Exchange truck, 7 ... Flat wheels, 8 ... Both collar wheels, 10 ... Positioning pin,
11 ... Positioning hole, 13 ... Positioning plate, 14 ... Cushion member, 15 ... Hole member, 51 ... Support member, R ... Rear side.

Claims (3)

[Scope of utility model registration request] 1. An exchange carriage (6) is movably mounted on a pair of front and rear rails (3) and (4) provided on a floor surface (2),
A mold or the like in which the exchange cart (6) supports a positioning pin (10) so as to be able to move up and down, and a positioning plate (13) that receives the positioning pin (10) is supported on the floor surface (2). In the positioning stop device for the exchange trolley , the positioning pin (1) is attached to the positioning plate (13).
0) into which the hole member (15) is inserted, and the hole member (1)
5) at least in the length direction of the rails (3) and (4)
A cushion member (14) for elastically displaceably supporting is provided.
Only, provided with a bottom Subomari tapered hole portion positioning holes (11) provided above the perforated member (15), a tapered portion above the positioning pins to be fitted from above to the tapered hole portion (10) A positioning stop device for a replacement truck such as a mold, which is provided in the. 2. A positioning stop device for an exchange truck such as a mold according to claim 1, wherein at least the rails (3, 4) and the floor surface (2) are provided.
A support member (51) is fixedly provided on one side, and the support member
(51) The positioning plate (13) is attached to the positioning stop device for an exchange cart such as a mold. 3. A positioning stop device for a replacement truck such as a mold according to claim 1, wherein the positioning pin (10) is provided on a rear side (R) of the exchange truck (6). , The positioning plate (13) is arranged on the rear side (R) of the rear rail (4), and both the collar wheels (8) of the exchange cart (6) are connected to the rear rail (4).
And a flat wheel (7) of the above-mentioned exchange truck (6) placed on the front rail (3).