JPH0795757A - Stopper pawl device assembly for positioning carrier of linear carrying device - Google Patents

Abstract

PURPOSE:To eliminate the need of having circular-arc curved sections which are hard to be machined from four stopper pawls and the need of using a torsion spring for returning rotation from each stopper pawl, and then, to make a low-precision frame usable. CONSTITUTION:After fixing a sliding shaft 24 between both side plates 22b and 22c of a frame 22 having a U-shaped cross section, rubber spacers 25 and 25, slide blocks 26 and 26, and compression springs 27 and 27 which push the blocks 26 and 26 inward are respectively arranged on the left and right sides of a spacer block 23 which is positioned to the center of the shaft 24. A left and right stopper pawls 29a and 29b respectively fixed to a left and right pawl supporting shafts 28 and 28 are inclined so that their surfaces which receive stopper pins 13 fixed to a carrier can become 45 deg. against the vertical plane and positions for restricting the pins 13 are secured by means of tension springs. In addition, the stopper pawls 29a and 29b are released from restricted states by pivotally moving the pawls 29a and 29b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to linear conveyors, and more particularly to improvements in carrier positioning stopper pawl assembly in linear conveyors.

[0002]

2. Description of the Related Art A front elevation view of a carrier positioning stopper pawl device assembly in a conventional linear transfer device is shown in FIG. First, the structure of the assembly 1 will be described. The assembly 1 is fixed to the track rail side of the linear carrier, the slide shaft 3 is fixed at a substantially horizontal position in the center of a box-shaped frame 2, and the left and right slide blocks 4a and 4b are slidably engaged with the slide shaft 3. And are pushed toward the center of the assembly 1 by the coil springs 5 and 5, respectively. Spacer blocks 6 and 6 are fixed to the frame 2 by bolts 7 and 7 in a direction perpendicular to the center of the assembly 1. In addition, slide blocks 4a, 4
On b, there are provided two pawl support shafts 8 which are perpendicular to the axial direction of the slide shaft 3 and horizontally, respectively, as a whole in vertically and horizontally symmetrical positions, and each of them has substantially the same triangular stopper pawls 9a. 9b, 9c, 9d are rotatably engaged via the bearing bush 10. Further, a torsion spring 11 is attached to each of the stopper claws 9a to 9d, and the right side of the stopper claws 9a and 9c is the upper inner surface 2a of the frame 2 and the side surface 6 of the spacer 6.
Right sides of the stopper claws 9b and 9d are slidably engaged with the lower inner surface 2b of the frame 2 and the side surfaces 6b and 6d of the spacer 6, respectively.

Next, the operation of the assembly 1 will be described. When the stopper pin 13 fixed horizontally to the carrier of the linear carrier moves from the left side to the right side in FIG. 11, for example, the oblique side of the stopper claws 9a and 9b is pushed,
The stopper claw 9a is counterclockwise against the torsion spring 11,
The stopper claws 9b rotate clockwise against the torsion springs 11 and, at the same time, the vertical sides of the stopper claws 9b are aligned with the spacer blocks 6b.
While sliding on the side surfaces 6a, 6b of the frame, the horizontal sides are separated from the inner surfaces 2a, 2b on the upper and lower sides of the frame, and the circular arc surfaces 9e, 9e slide on the inner surfaces 2a, 2b on the upper and lower sides of the frame, respectively.
The slide block 4a is moved to the left along the slide shaft 3 against the coil spring 5 via the claw support shafts 8,8. In this way, the stopper pin 13 enters the position of the chain double-dashed line,
It stops by hitting the stopper claws 9c and 9d on the right side. At this time, since the stopper claws 9c and 9d are prevented from rotating by the inner surfaces 2a and 2b above and below the frame, respectively, the slide block 4b moves slightly to the right, but returns to its original position by the coil spring 5.

When the carrier is started from the restraining stop position where the stopper pin 13 is surrounded by the stopper claws 9a to 9d as shown in FIG. 11, the assembly 1 as a whole moves at right angles to the paper surface in the paper spine direction at a position not shown. When moved, the stopper pin 13 is disengaged from the stopper claws 9a to 9d. Similarly, when the carrier does not have to stop at the position where the assembly 1 is installed, the assembly 1 is similarly moved in the paper spine direction and placed.

[0005]

The carrier positioning stopper pawl device assembly having the above-described structure has an arcuate curved portion in the shape of the stopper pawl, and it is relatively difficult to machine the curved portion, so that the stopper pawl can be rotated. It is necessary to attach a torsion spring to each of the four stopper pawls in order to return, and in order to receive the rotation moment of the stopper pawls on the upper and lower inner surfaces of the frame, it is necessary to make the machining accuracy of the upper and lower inner surfaces of the frame strict. It is an object of the present invention to solve these problems including the above problems.

[0006]

In order to solve the above problems, the present invention provides, as a first invention, a sliding shaft fixed between both side plates of a frame having a U-shaped cross section, and the center of the sliding shaft. Spacer blocks, rubber spacers on the left and right sides, left and right slide blocks on both outer sides, and compression coil springs that press the left and right slide blocks to the center on the outer sides, and the left and right slide blocks can rotate. The left and right stopper pawls fixed to the supporting left and right pawl support shafts have an abutting surface that receives the stopper pin fixed to the carrier at an angle of 45 ° or less with respect to the vertical, and the left and right stopper pawls are The tension coil spring located on the back side of the slide block holds the position where the stopper pin is restrained, and the restrained position is released by driving a small motor or the like. Source by providing a carrier positioning stopper pawl assembly of the linear transport device having a structure carried out by pivoting the stopper claw through the pawl support shaft,
As a second invention, a slide shaft is fixed between both side plates of a channel steel frame, and a left and right slide block is compressed coil springs so as to be slidable on the slide shaft with a spacer fixed at the center of the bottom plate of the frame interposed therebetween. The stopper claws that make up and down pairs on the left and right slide blocks, respectively, so that they are interlocked by gears on the back side of the slide block, and pull the upper and lower gears together. A linear structure having a structure in which a pair of stopper claws are urged by a coil spring to be closed, and two upper or lower claw support shafts are extended rearward so that they can be independently rotated by a drive source such as a small motor. An object of the present invention is to provide a carrier positioning stopper claw device assembly for a transport device.

[0007]

In the assembly according to the first aspect of the invention, when the stopper pin fixed to the carrier advances from either the left or right direction, the stopper claw in the forward direction is pushed down against the force of the tension coil spring, 45 of the stopper claw on
Stop by hitting an impact surface inclined below °. At this time, the front stopper claw is restored to its original position by a tension coil spring to restrain the stopper pin. The rubber spacer absorbs impact force and sound generated by vibration during this period. Then, when the carrier is started and when it is not necessary to stop the carrier at that position, the stopper pawl is pivoted by the drive source via the pawl support shaft and is held outside the passage of the stopper pin. In the assembly according to the second aspect of the invention, when the stopper claws fixed to the carrier of the linear transport device are advanced from either the left or right direction, the pair of stopper claws located in the front in the direction of advance is pulled by the tension coil. It spreads out against the spring and advances, and hits against the tips of the pair of stopper claws at the end to stop. At this time, the stopper block that supports the stopper claw via the claw support shaft slightly moves along the slide shaft,
Return to the original position by the compression coil spring. On the other hand, the pair of stopper pawls on the front side is closed, and the stopper pin is stopped at a position just above the spacer by the two pairs of stopper pawls. Next, when the carrier starts to move, the drive source rotates the claw support shaft in the direction of travel, and the pair of closed stopper claws opens and becomes parallel via the gear, and the stopper pin is released from the constraint. When the carrier does not need to be stopped, the two pairs of stopper claws are opened and placed as described above.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment corresponding to a first invention of a carrier positioning stopper pawl device assembly of a linear transport device according to the present invention will be described below with reference to FIGS.
A second embodiment corresponding to the second invention will be described with reference to FIGS.
This will be described with reference to 0. First Embodiment: FIG. 1 is a front elevational view of a first embodiment of a carrier positioning stopper pawl device assembly of a linear carrier according to the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is an arrow A of FIG. Partial view, FIG. 4 is a positional view of the relationship between the stopper pin and the stopper claw when the carrier is in the stop position in FIG. 1, and FIG. 5 is a case where the carrier in FIG. FIG. 6 is a position diagram of the stopper claw of FIG. First, the structure of the assembly 21 will be described. A spacer block 23 is fixed to the center of the bottom plate 22a of the frame 22 having a U-shaped cross section by bolts or the like, and the sliding shaft 24 is fixed to the left and right side plates 22b and 22c through the spacer block 23. The spacer block 2 is engaged with the sliding shaft 24.
Rubber spacers 25, 25, slide blocks 26, 26, and compression coil springs 27, 27 are arranged on the left and right sides of 3 in order from the spacer block 23. Claw support shafts 28, 28 are rotatably attached to the left and right slide blocks 26, 26 in a horizontal direction at right angles to the slide shaft 24.
Left and right stopper claws 29a and 29b are fixed to one end portion (lower end portion in FIG. 2) of 8, 28. Left and right stopper claws 29
a and 29b are symmetrical, and the position of the right stopper claw 29b in FIG. 1 will be explained.
The abutting surface 30 of 3 has an angle α (α ≦ 45
The surface 31 inclined so as to open upward at (°) and acting to push down the stopper claw 29b by moving the stopper pin 13 from right to left in the figure forms an angle β (β = 3) with respect to the horizontal plane.
It is inclined to open downward at 0 °). Further, a cutout 32 is provided near the intersection of the surfaces 30 and 31 so as not to interfere with the proximity switch 23a attached to the upper portion of the spacer block 23. Further, the surface 33 of the stopper claw 29b opposite to the surface 31 is the step portion 2 of the slide block 26.
It is adjacent to 6a. Opposite ends of the claw support shafts 28, 28 (see FIG.
2) is connected to a drive source such as a small motor (not shown), and the rotary plates 34, 34 are fixed near the slide blocks 26, 26 as shown in FIGS. , 34 are pulled by a tension coil spring 35 via pins 34a, 34a, and in FIG.
Receives a torque in a counterclockwise direction and the right stopper claw 29b receives a torque in a clockwise direction.

Next, the operation of the assembly 21 will be described. First, the left and right stopper claws 29a and 29b are at the position of the stopper claw 29b in FIG. 1, that is, the position shown in FIG. 4, and when the stopper pin 13 fixed to the carrier advances from the left side to the right side in FIG. The stopper pin 13 pushes down the surface 31 of the left stopper pin 29a, and the left stopper claw 29a
Rotates clockwise against the coil spring 35, and the stopper pin 13 strikes against the surface 30 of the right stopper pawl 29b and stops. At this time, the angle α of the right stopper claw 29b is 45 °.
Since it is the following, it receives a clockwise torque, but since the surface 33 is adjacent to the stepped portion 26a of the slide block 26, it does not rotate and the slide block 26 is moved slightly to the right against the coil spring 27. However, immediately the coil spring 27
Pushed back to. The rubber spacer 25 absorbs the impact force and sound due to the vibration during this period. Next, when the carrier is started, the right stopper claw 29b is pivoted counterclockwise by the drive source (not shown) via the claw support shaft 28, and the restraint of the stopper pin 13 is released as shown in FIG. It Further, when the carrier does not have to stop at the position of the assembly 21, the left and right stopper claws 29 are driven by a drive source (not shown).
A and 29b are placed while being held almost flat as shown in FIG. The same applies when the carrier progresses from right to left. The proximity switch 23a attached to the spacer block 23 serves to send a signal notifying the control unit that the carrier is at the stop position, for example.

Second Embodiment: FIG. 6 shows a second embodiment of a carrier positioning stopper claw device assembly of a linear carrier according to the present invention.
FIG. 6 is a front elevation view of the embodiment (a state where the stopper pin of the carrier advances from the left and is in the middle of the stopper claw).
FIG. 8 is a partial view of FIG. 7 viewed from the direction of arrow A, FIG. 9 is a positional view of the relationship between the stopper pin and the stopper claw when the carrier in FIG. 6 is at the stop position, and FIG. It is a position figure of a stopper nail when it is not necessary to stop in the position of an apparatus assembly. First, this assembly 4
The structure of 1 will be described. Left and right side plates 42a of the channel steel 42,
A slide shaft 43 is fixed between the portions 42b, and a cylindrical spacer 44 is fixed at the center of the bottom plate 42c. The left and right slide blocks 45 are slidable on the slide shaft 43 with the spacer 44 interposed therebetween.
a and 45b are engaged and pressed against the spacer 44 by the compression coil springs 46 and 46. A pair of pawl support shafts 47a, 47b and 47c, 47d having an axis line in the horizontal direction on the inner surface perpendicular to the slide shaft 43 is rotatably supported on the left and right slide blocks 45a, 45b, respectively. Stopper claws 48a to 48d each having a rectangular rod shape and having cutouts 49a to 49d at one end are fixed to one end (lower side in FIG. 7) of the claw support shafts 47a to 47d, and are provided on the back sides of the slide blocks 45a and 45b. Gears 50a respectively
.About.50d are attached, and gears 50a and 50b and 50c and 50d mesh with each other. Claw support shafts 47b, 4
7d extends rearward (upward in FIG. 7) and is connected to respective drive sources such as a small motor (not shown). As shown in FIGS. 7 and 8, the gears 50b and 50d are tension coil springs 52 attached to the pins 51 and 51 fixed to the gears 50b and 50d, respectively, so that the stopper claw 48b is clockwise and the stopper claw 48d is counterclockwise in FIG. Receive torque to rotate. The rotation of the stopper claws 48b and 48d due to this torque is stopped by the pin 51 engaging the stop bar 53a of the stop device 53 bolted to the bottom plate 42c of the frame 42.

Next, the operation of the assembly 41 will be described. As shown in FIG. 6, when the stopper pin 13 fixed to the carrier advances from the left side to the right side in the figure, the stopper claws 48 a and 48 b are spread out against the tension coil spring 52, and the stopper pin 13 is pushed. Is a stopper claw 48c, 48d
Then, the stopper claws 48a and 48b are closed by the tension coil spring 52 and are restrained as shown in FIG. At this time, the stopper claws 48c and 48d are attached to the claw support shaft 47.
Although the slide block 45b is slightly moved to the right in the figure via c and 47d, the compression coil spring 46 returns the slide block 45b to the original position. Next, when the carrier starts moving, when the pawl support shaft 47d is rotated counterclockwise in FIG. 6 by a drive source such as a small motor (not shown), the gears 50d, 50c and the pawl support shaft 47c are passed through. As a result, the stopper claws 48c and 48d rotate in opposite directions and are opened. When the carrier does not need to stop at the position of the assembly 41, as shown in FIG.
Open both sets 8b and 48c, 48d. The same applies when the carrier progresses from right to left.

[0012]

Since the carrier positioning stopper pawl device assembly of the linear carrier according to the present invention is constructed as described above, it has the following effects. According to the first invention, the overall size is small, compact, the number of parts is small, and precise machining is not required. Therefore, a great cost reduction can be obtained. According to the second aspect of the invention, since the stopper claw has a long and slender and simple shape, the height of the assembly is low and the space is small. The frame is made of commercially available channel steel, and the machining is rigorous. No precision is required, and the manufacturing cost is greatly reduced.

[Brief description of drawings]

FIG. 1 is a front elevation view of a first embodiment of a carrier positioning stopper pawl device assembly of a linear transport device according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a partial view taken along the arrow A in FIG.

FIG. 4 is a positional diagram showing a relationship between a stopper pin and a stopper claw when the carrier in FIG. 1 is at a stop position.

5 is a position diagram of the stopper claws when the carrier in FIG. 1 does not need to stop at the position of the stopper claw device assembly.

FIG. 6 is a front elevational view of a second embodiment of the carrier positioning stopper pawl device assembly of the linear transport device according to the present invention.

FIG. 7 is a plan view of FIG.

FIG. 8 is a partial view taken along arrow A in FIG.

FIG. 9 is a relational position diagram of the stopper pin and the stopper claw when the carrier in FIG. 6 is at the stop position.

10 is a position diagram of the stopper claws when the carrier in FIG. 6 does not need to stop at the position of the stopper claw device assembly.

FIG. 11 is a front elevation view of a carrier positioning stopper pawl device assembly of a conventional linear transfer device.

[Explanation of symbols]

 13: Stopper pin 21: Carrier positioning stopper claw device assembly 22: Frame 23: Spacer block 24: Sliding shaft 25: Rubber spacer 26: Slide block 27: Compression coil spring 28: Claw support shaft 29: Stopper claw 35: Tensile coil Spring 41: Carrier Positioning Stopper Claw Device Assembly 42: Frame 43: Sliding Shaft 44: Spacer 45: Slide Block 46: Compression Coil Spring 47: Claw Support Shaft 48: Stopper Claw 52: Tension Coil Spring

Claims (2)

[Claims] 1. In a carrier positioning stopper claw device assembly of a linear transfer device, a slide shaft is fixed between both side plates of a frame having a U-shaped cross section, a spacer block is provided at the center of the slide shaft, and rubber spacers are provided on the left and right sides thereof. Left and right slide blocks are arranged on both outer sides, and compression coil springs that push the left and right slide blocks toward the center are arranged on the outer sides, and fixed to the left and right claw support shafts that are rotatably supported by the left and right slide blocks. The left and right stopper claws have an abutting surface inclined to the vertical for receiving the stopper pin fixed to the carrier at an angle of 45 ° or less with respect to the vertical, and the left and right stopper claws are one located on the back side of the left and right slide blocks. The position where the stopper pin is restrained is held by the tension coil spring, and the restraint position is released by a driving source such as a small motor. Carrier positioning stopper pawl assembly of linear transport device characterized by having a structure carried out by pivoting the stopper claw through the tight support shaft. 2. A left and right slide block is fixed by a compression coil spring so that a slide shaft is fixed between both side plates of a grooved steel frame, and a spacer fixed to the center of the bottom plate of the frame is sandwiched between the slide blocks so as to be slidable on the slide shaft. The upper and lower gears are arranged so as to be pressed against the spacer, and the upper and lower pair of stopper claws are arranged on the back side of the slide block so as to be interlocked with each other by a gear, and the upper and lower gears are tension coils. A structure is provided in which a pair of stopper claws are urged by springs to be closed, and further two upper or lower claw support shafts are extended rearward so that they can be independently rotated by a drive source such as a small motor. A carrier positioning stopper claw device assembly for a characteristic linear transfer device.