JPH07204968A - Pallet shifting device - Google Patents

Abstract

PURPOSE:To freely set the movement of a pallet by axially combining a plurality of modular cam elements so as to form a cylindrical cam. CONSTITUTION:A feed cam groove 29 in a feed cylindrical cam 16 is composed of a plurality of cam groove elements 29A, 29B, 29C, 29D, 29E, 29F, 29G, 29H, 29I, 29J, 29K which are continuously formed in the feed cylindrical cam 16 along the axis X thereof. Each of these cam elements 29A to 29K is composed of a straight part (a) and an inclined part (b) which are continuous to one another. This straight part (a) extends at a right angle to the axis X of the feed cylindrical cam 16, and the inclined part (b) is inclined with respect to the axis X of the feed cylindrical cam 16. The inclined part (b) and the straight part (b) of adjacent those of the cam groove elements 29A to 29K are continuous to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pallet transfer device for transferring a plurality of pallets to a predetermined position, for example, a processing station in a processing machine.

[0002]

2. Description of the Related Art Conventionally, in a processing machine facility, an invention described in Japanese Patent Publication No. 49-49157 has been proposed as a pallet transfer device for placing a workpiece on a pallet and transferring it to each processing station. There is.

In this pallet transfer device, a pallet is engaged with a guide rail, a cylindrical cam is arranged with its shaft center along the guide rail, and a cam follower installed on the pallet is fitted in a cam groove of the cylindrical cam. The pallet is provided so as to be transferred along the guide rail via the cam follower and the cam groove by the rotational drive of the cylindrical cam.

[0004]

However, in the above-described conventional pallet transfer device, the cylindrical cam has a limit in the axial length because of the manufacturing of the cam groove shape. Therefore,
When almost all pallets are fitted into the cam groove of the cylindrical cam and transferred, the pallet transfer distance is determined by the axial length of the cylindrical cam, and this pallet transfer distance cannot be set freely.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a pallet transfer device capable of freely setting a pallet transfer distance.

[0006]

According to the present invention, a pallet is engaged with a guide rail, a cylindrical cam is disposed with its shaft center along the guide rail, and a cam follower installed on the pallet is the cylindrical cam. Is fitted in the cam groove of
In the pallet transfer device in which the pallet is transferably provided along the guide rail via the cam follower and the cam groove by the rotational driving of the cylindrical cam,
The cylindrical cam is configured by connecting a plurality of modularized cam elements in the axial direction.

[0007]

Therefore, according to the pallet transfer device of the present invention, since the cylindrical cam is constituted by coupling a plurality of modularized cam elements in the axial direction, the number of cam elements can be increased or decreased. The pallet transfer distance can be freely set.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front perspective view showing a first embodiment of a pallet transfer device according to the present invention. FIG. 2 is a rear perspective view of the pallet transfer device of FIG. FIG. 3 shows III- of FIG.
It is sectional drawing which follows the III line. FIG. 4 is a sectional view taken along the line IV-IV in FIG. FIG. 5 shows the feed cylindrical cam of FIGS. 1 and 2, (A) is a front view thereof, and (B) is a cam development view thereof. FIG. 6 shows the return cylindrical cam of FIG. 2, (A)
Is a front view thereof, and (B) is a cam development view thereof. Figure 7
Shows the cam element of the feed cylindrical cam of FIG.
(A), (B) and (C) are front views, (D) is a front view showing a coupling portion of a cam element, and (E) is an exploded perspective view of the coupling portion.

As shown in FIGS. 1 and 2, the pallet transfer device 10 includes a feed guide rail 12 and a return guide rail 13 for guiding the travel of a plurality of pallets 11, and a feed guide rail 12 and a return guide rail 13. Pallet 1
Return transfer device 14 and transfer transfer device 15 for transferring 1 intermittently, and feed cylindrical cam 16 for moving pallet 11
And a return cylindrical cam 17, and a cam drive mechanism 18 that rotationally drives the feed cylindrical cam 16 and the return cylindrical cam 17.

The feed guide rails 12 and the return guide rails 13 are arranged in the transfer direction of the pallet 11, and each has a rail element 19 bolted to a rail frame 20 as shown in FIG. These feed guide rails 12 and return guide rails 13
Are arranged approximately 90 degrees apart in the vertical plane, and the rail frame 20 is supported on the frame 22 by the rail stand 21 as shown in FIGS. 1 and 2. That is, the feed guide rail 12 enables the pallet 11 to be transferred in the horizontal state, and the return guide rail 13 allows the pallet 11 to be transferred in the vertical state.

As shown in FIG. 3, each of the plurality of pallets 11 has a slider 24 fixed to a pallet plate 23 and a cam roller 25 as a cam follower.
Is installed and configured. The slider 24 and the cam roller 25 are arranged at a distance of about 90 degrees in the vertical plane, and the slider 24 is provided so as to be engageable with the rail elements 19 of the feed guide rail 12 and the return guide rail 13.
The cam roller 25 is fitted into the cam grooves 29, 30 (described later) of the feed cylindrical cam 16 and the return cylindrical cam 17. A workpiece can be placed on the surface 11A of the pallet plate 23.

The return transfer device 14 and the transfer transfer device 15
As shown in FIGS. 1 and 2, the feed guide rail 1
2, the return guide rail 13, the feed cylindrical cam 16 and the return cylindrical cam 17 are respectively arranged at both ends. In the return transfer device 14 and the feed transfer device 15, the transfer device main body 26 converts the coupling rotation from the drive system (not shown) into intermittent rotation, intermittently rotates the index table, and the index table 26A. A plurality of, for example, four arms 27 are fixed in a substantially radial manner, and a rail element 28 is fixed to the tip of the arm 27. This rail element 28 has a cross-sectional shape of the feed guide rail 12
And the same shape as the rail element 19 of the return guide rail 13, and the axial length is set to be slightly longer than the length of the pallet 11 in the feed guide rail 12 and return guide rail 13 directions. The guide rail 12 is sequentially positioned at an extended position of the rail element 19 of the guide rail 12 or an extended position of the rail element 19 of the return guide rail 13.

The return transfer device 14 includes the feed guide rail 1
Pallet 11 transferred from 2 to rail element 28
Is rotated 90 degrees downward in the vertical plane and transferred to the return guide rail 13. Further, the feed transfer device 15 rotates the pallet 11 transferred from the return guide rail 13 to the rail element 28 by about 90 degrees in the vertical direction and transfers it to the feed guide rail 12.

A feed cylindrical cam 16 and a return cylindrical cam 17
As shown in FIGS. 1 and 2, the shafts are arranged in parallel along the feed guide rail 12 and the return guide rail 13, and are installed at positions separated by about 90 degrees in the vertical plane (see FIG. 3). A feed cam groove 29 and a return cam groove 30 are formed in the feed cylindrical cam 16 and the return cylindrical cam 17, respectively, and the pallet 11 is provided in the feed cam groove 29 and the return cam groove 30.
The cam roller 25 can be fitted.

As shown in FIG. 5, a plurality of feed cam grooves 29 of the feed cylindrical cam 16 are provided on the outer circumference of the feed cylindrical cam 16 along the axis X of the feed cylindrical cam 16 (11 in this embodiment). Cam groove elements 29A, 29B, 29C,
29D, 29E, 29F, 29G, 29H, 29I, 2
9J and 29K are continuously engraved. The reference numeral 44 in FIG. 5 indicates a thrust groove described later. Each of these cam groove elements 29A-K is provided with a straight line portion a and an inclined portion b in series.
The straight portion a is formed at a right angle to the axis X of the feed cylindrical cam 16, and the inclined portion b is formed inclined with respect to the axis X of the feed cylindrical cam 16. Adjacent cam groove element 29A
The inclined portion b of ~ K and the straight portion a are continuously formed.

In the cam groove elements 29B to 29J, the straight portion a extends from the 0 ° position to the θ ₁ position on the side surface of the feed cylindrical cam 16, and the inclined portion b inclines from this position to the 360 ° position. This inclined portion b is the axis X of the feed cylindrical cam 16.
The dimension extending in the direction is defined by the cam groove elements 29B, 29B.
S _{2 for} C and 29D, cam groove elements 29E, 29F
And 29G to S ₃ and cam groove elements 29H, 29I and 29J to S ₄ respectively (S ₃ <S ₂ <S
₄ ).

In the cam groove element 29A, the straight portion a extends from the position θ _{4 on} the side surface of the feed cylindrical cam 16 to the position θ ₂ beyond the position 0 °, and the inclined portion b extends from this position to the position 360 °. It extends at an angle. Further, in the cam groove element 29K, the inclined portion b is provided on the side surface of the feed cylindrical cam 16.
It extends obliquely from the 0 ° position to the θ ₃ position, and from this position, the straight line portion a extends straight beyond the 360 ° position to the θ ₂ position. In these cam groove elements 29A and 29K, the dimension in which the inclined portion b extends in the axis X direction of the feed cylindrical cam 16 is set to S ₁ (S ₃ <S ₁ <S ₂ ).

When the cam roller 25 of the pallet 11 moves in the linear portion a of the cam groove elements 29A to 29K by the rotation of the feed cylindrical cam 16, the pallet 11 stops in the direction of the axis X of the feed cylindrical cam 16 and the pallet is moved. When the cam roller 25 of No. 11 moves in the inclined portion b of the cam groove elements 29A to K, the pallet 11 moves toward the X of the feed cylindrical cam 16.
And is transported in the A direction along the feed guide rail 12. Therefore, the rotation of the feed cylindrical cam 16 causes the cam roller 25 of the pallet 11 to move within the feed cam groove 29 including the cam groove elements 29A to K, so that the pallet 11 can be intermittently transferred along the feed guide rail 12. Composed.

Dimensions S ₁ and S of the feed cylindrical cam 16 in the direction X of the axis in the inclined portion b of the cam groove elements 29A to 29K.
₂ , S ₃ , and S ₄ are set as the position intervals of the pallets 11 fitted into the cam groove elements 29A to 29K, respectively. The transfer time of each pallet 11 fitted into each of the cam groove elements 29A to K is determined from the position interval and the rotation speed of the feed cylindrical cam 16. Further, the stop time of each pallet 11 fitted into each of the cam groove elements 29A to K is determined from the length of the straight line portion a in each of the cam groove elements 29A to K and the rotation speed of the feed cylindrical cam 16.

The intermittent transfer time of the pallet 11 by the feed cylindrical cam 16 determined by the transfer time and the stop time of the pallet 11 is the same as the intermittent rotation time of the pallet 11 by the return transfer device 14 and the transfer transfer device 15. Is set to.

On the other hand, as shown in FIG. 6, the return cylindrical cam 1
A plurality of (7 in this embodiment) cam groove elements 30A, 30B, 30 are provided on the outer circumference of the return cylindrical cam 17 along the axis Y of the return cylindrical cam 17.
C, 30D, 30E, 30F and 30G are continuously formed by engraving. Reference numeral 44 in FIG. 6 also indicates a thrust groove described later. These cam groove elements 30
Of the A to G, the cam groove elements 30A and 30G are
A straight line portion α extending at right angles to the axis Y of the return cylindrical cam 17,
The return cylindrical cam 17 is provided with a series of inclined portions β that extend obliquely to the axis Y. Further, the cam groove elements 30B to 30F are composed of only the inclined portion β. The inclined portions β of the adjacent cam groove elements 30A to 30G are continuously provided.

In the cam groove element 30A, the straight line portion α
, Extends from the θ ₆ position on the side surface of the return cylindrical cam 17 beyond the 0 ° position to the θ ₅ position, and the inclined portion β extends from this position to the 360 ° position. In addition, in the cam groove element 30G, the straight line portion α is 0 from the θ ₆ position on the side surface of the return cylindrical cam.
It extends to the ° position, and the inclined part β is formed from this position over the entire length of 360 °.

These cam groove elements 30A and 30
In G, the dimension of the return cylindrical cam 17 in the inclined portion β in the axis Y direction is set to l ₁ . Further, in the cam groove elements 30B to 30F, the return cylindrical cam 17 in the inclined portion β is formed.
The dimension of the axis line in the Y direction is set to l ₂ (> l ₁ ).
Therefore, the rotation of the return cylindrical cam 17 causes the pallet 11 to rotate.
The pallet 11 moves continuously in the Y direction of the return cylindrical cam 17 by moving the cam roller 25 of the cam roller 25 in the inclined portion β of the cam groove elements 30A to 30G, and along the return guide rail 13 in the arrow B direction. High speed continuous transfer.

The linear portions α of the cam groove elements 30A and 30G are for fitting the cam rollers 25 of the pallet 11 when the pallet 11 is vertically rotated by the return transfer device 14 and the feed transfer device 15. It is a groove. Similarly, the linear portions a of the cam groove elements 29A and 29K of the feed cam groove 29 are similarly returned by the return transfer device 14 and the feed transfer device 1.
When the pallet 11 is vertically rotated by 5, the cam roller 25 of the pallet 11 is fitted.

Now, as shown in FIG. 5, the feed cylindrical cam 16 is constructed to have a predetermined length by axially connecting the modularized feed cylindrical cam elements 50A and 50B. The return cylinder cam 17 is, as shown in FIG. 6, a modularized return cylinder cam element 60A.
And 60B are connected in the axial direction to form a predetermined length.

As shown in FIG. 7, the feed cylindrical cam element 50A is a cam element located at the end of the feed cylindrical cam 16, and the feed cylindrical cam element 50B is a cam element having a feed driven gear 32. The feed cylindrical cam element 50C is a cam element that can be arranged between the feed cylindrical cam elements 50A and 50B. A coupling projection 51 is formed at one end of each of the cam elements 50A, 50B, and 50C, and a coupling recess 52 is formed at the other end (excluding the end of the feed cylindrical cam element 50A). The coupling convex portion 51 and the coupling concave portion 52 extend in the diametrical direction, and inclined cross sections 53 are formed on both side surfaces. As shown in FIGS. 7D and 7E, the coupling convex portion 51 is slidably fitted into the coupling concave portion 52 in the diametrical direction of the cam element, and the feed cylindrical cam elements 50A and 50B are integrally rotated. Axial immobilization.

Return cylindrical cam element 60A shown in FIG.
And 60B are configured similarly to the feed cylindrical cam elements 50A and 50B except for the cam groove shape, and a return cylindrical cam element corresponding to the feed cylindrical cam element 50C is also formed. The return cylindrical cam elements 60A and 60
B is also coupled in the axial direction by a coupling convex portion 61 and a coupling concave portion 62 having the same configurations as the coupling convex portion 51 and the coupling concave portion 52, and is configured to be integrally rotated and immobile in the axial direction.

The feed cylindrical cam 16 and the return cylindrical cam 1
Rotation of the cam drive mechanism 18 shown in FIGS. 3 and 4, in particular.
It is carried out by. The cam drive mechanism 18 includes a drive gear 31, a motor (not shown) as a rotary drive source, a feed driven gear 32, and a return driven gear 33. Send driven gear 32, return driven gear 33
Is the feed cylindrical cam 16 and the return cylindrical cam 17 at arbitrary positions in the axial direction of the feed cylindrical cam 16 and the return cylindrical cam 17.
Is directly engraved on the outer peripheral surface of each. Further, the drive gear 31 meshes with the feed driven gear 32 and the return driven gear 33, and the driving force of the motor is transmitted via the flat belt 34 to be rotationally driven.

That is, the drive gear 31 is rotatably integrally fixed to the gear shaft 35, and the gear shaft 35 is rotatably arranged in the gear housing 37 via the bearing 36. The gear housing 37 is bolted to a gear stand 38 and supported by the frame 22. A timing pulley 39 is integrally fixed to one end of the gear shaft 35, and a flat belt 34 is wound around the timing pulley 39. Accordingly, the rotation of the motor (not shown) causes the flat belt 34 to rotate the drive gear 31 via the timing pulley 39, and this rotational driving force is fed to the feed cylindrical gear 16 and the return driven gear 32 via the return driven gear 32 and the return driven gear 33. It is transmitted to each of the cylindrical cams 17.

1 and 2, reference numeral 40 is a radial guide device, and reference numeral 41 is a thrust guide device. The radial guide device 40 includes a feed cylindrical cam 1
6, each of the return cylindrical cam 17 to the radial roller 42
Is used to support the feed cylinder cam 16 and the return cylinder cam 17 in the radial direction. The radial guide device 40 is installed at a plurality of axial positions (for example, three positions) of the feed cylindrical cam 16 and the return cylindrical cam 17.

Further, the thrust guide device 41 is provided with a thrust roller 43 at its tip, and this thrust roller 43 meshes with a thrust groove 44 formed in the feed cylindrical cam 16 and the return cylindrical cam 17. Thrust groove 44
Are formed so as to be orthogonal to the axial centers of the feed cylindrical cam 16 and the return cylindrical cam 17. Thrust roller 43 has thrust groove 4
When the feed cylinder cam 16 and the return cylinder cam 17 are rotated, the feed cylinder cam 16 and the return cylinder cam 17 are supported in the thrust direction by being fitted in the position 4.

Next, the operation will be described. Cam drive mechanism 18
When the drive gear 31 of is driven to rotate, the feed cylindrical cam 1
6 and the return cylindrical cam 17 rotate in the same direction, and at the same time, the transfer device main body 2 of the return transfer device 14 and the feed transfer device 15
6 intermittently rotates the index table 26A. Due to the rotation of the feed cylindrical cam 16, the pallet 11 is moved through the feed cam groove 29 and the cam roller 25.
It is transferred intermittently along arrow 2 in the direction of arrow A. The intermittently transferred pallet 11 is transferred to the return guide rail 13 side by the intermittent rotation of the index table 26A in the return transfer device 14, and by the rotation of the return cylindrical cam 17,
Through the return cam groove 30 and the cam roller 25, it is transported at high speed along the return guide rail 13 in the direction of arrow B. The pallet 11 transferred at high speed is transferred to the feed guide rail 12 side by the intermittent rotation of the index table 26A in the feed transfer device 15, and is again fed to the feed cylindrical cam 1.
6 is intermittently transferred on the feed guide rail 12.

For example, while the pallet 11 is intermittently transferred on the feed guide rail 12, the workpiece placed on the pallet 11 is processed by the processing machine at the stop position (processing station) of the pallet 11.

According to the above embodiment, the feed driven gear 32 meshing with the drive gear 31 which is rotationally driven by the motor through the flat belt 34 and the timing pulley 39,
The return driven gears 33 are the feed cylindrical cams 16,
Since the return cylindrical cam 17 is directly engraved on the outer circumference, the number of parts such as the number of gears of the cam drive mechanism 18 can be reduced and the cost can be reduced.

Further, since the feed driven gear 32 and the return driven gear 33 are engraved on the outer circumferences of the feed cylindrical cam 16 and the return cylindrical cam 17 at arbitrary positions, the degree of freedom in the layout of the cam drive mechanism 18 is increased, If the installation position of the cam drive mechanism 18 is adjusted, the pallet transfer device 1
0 can be miniaturized.

Further, the return guide rail 13 is provided on the pallet 1.
Since 1 is transferred in the return direction in the vertical state, the pallet 11 transferred in the return direction is accommodated within the installation area of the return cylindrical cam 17. As a result, the installation area of the pallet transfer device 10 can be reduced, and the pallet transfer device 10 can be downsized.

The feed cam groove 29 formed in the feed cylindrical cam 16 is composed of continuous cam groove elements 29A to K. Each of the cam groove elements 29A to K has a straight line portion a and an inclined portion b individually. Has been formed. Therefore, the pallet 11 fitted to these cam groove elements 29A-K
The position interval, transfer time and stop time can be set for each position of the cam groove elements 29A to 29K, and the pallet 11 can be transferred independently at these positions.

Further, the cam groove elements 29A and 2 located at both ends of the feed cylindrical cam 16 and the return cylindrical cam 17 respectively.
The straight portion a is formed in 9K, and the cam groove element 3
Since the straight portions α are formed in 0A and 30G, the cam roller 25 of the pallet 11 is fitted into these straight portions a and α to feed the pallet 11 to the cylindrical cam 12
And the return cylindrical cam 13 can be positioned in the axial direction. Therefore, it is not necessary to install a stopper for the pallet 11.

Further, the feed cylindrical cam 16 is constituted by connecting a plurality of modularized feed cylindrical cam elements 50A, 50B and 50C in the axial direction, and the return cylindrical cam 17 is provided.
Is configured by axially coupling a plurality of modularized return cylinder cam elements 60A, 60B, etc., therefore, only by selecting and coupling desired cam elements, the feed cylinder cam 16 and the return cylinder cam 16 can be coupled. The axial length of 17 can be adjusted. As a result, the transfer distance of the pallet 11 determined by the feed cylindrical cam 16 and the return cylindrical cam 17 can be freely set.

The feed cylinder cam 16 and the return cylinder cam 17 are rotatably supported in the radial direction by the radial guide device 40 and rotatably supported in the thrust direction by the thrust guide device 41. Of course, the radial guide device 40 and the thrust guide device 41 can be installed at arbitrary positions in the axial direction of the feed cylindrical cam 16 and the return cylindrical cam 17. Therefore, the feed cylindrical cam element 50
The axial length of the feed cylindrical cam 16 is set to be long by A, 50B and 50C, and similarly, the return cylindrical cam element 60A,
Even if the axial length of the return cylindrical cam 17 is set to be long by 60B, ...
Can be rotatably supported.

FIG. 8 shows the feed cylinder cam element of the feed cylinder cam in the second embodiment of the pallet transfer device according to the present invention, and (A), (B) and (C) are front views of the same. (D) and (E) are respectively a front view and a perspective view of the connector, and (F) and (G) are a front view and an exploded perspective view of the coupling part, respectively. In the second embodiment, the same parts as those in the above-mentioned embodiment are designated by the same reference numerals and the description thereof will be omitted.

The feed cam element 7 of this feed cylindrical cam
0A, 70B, and 70C, the connecting convex portion 51 is formed at one end of the feed cylindrical cam element 70A, and the connecting convex portion 51 is formed at both ends of the feed cylindrical cam element 70B and 70C.
Are formed. Then, coupling recesses 52 are formed on both side surfaces of the connector 71. Feed cylindrical cam element 70
By fitting the coupling convex portion 51 of A, 70B, and 70C into the coupling concave portion 52 of the connector 71, the feed cylindrical cam elements 70A, 70B, and 70C are coupled in the axial direction, so that they are integrally rotated and immobile in the axial direction. .

The return cylindrical cam is also constructed in the same manner as the feed cylindrical cam elements 70A, 70B and 70C of the feed cylindrical cam except for the shape of the cam groove, and is axially coupled using the same connector to form the return cylindrical cam. Is configured.

FIGS. 9A and 9B show a connecting portion of a feed cylindrical cam element in a third embodiment of the pallet transfer device according to the present invention, FIG. 9A is a partial front view thereof, and FIG. 9B is a partial perspective view thereof. is there. In the third embodiment, the first
The same parts as those in the embodiment are designated by the same reference numerals and the description thereof will be omitted.

The feed cylinder cam of the third embodiment is also constructed by connecting feed cylinder cam elements 80A and 80B in the axial direction. In this case, the feed cylindrical cam element 80
A pin 81 is implanted in one end face of A and 80B, and a pin hole 82 is formed in the other end face. By fitting the pin 81 into the pin hole 82, the feed cylindrical cam elements 80A and 8
OB and the like are integrally coupled with each other.

Also in the return cylindrical cam, the return cylindrical cam element is configured in the same manner as the feed cylindrical cam elements 80A and 80B except the cam groove shape, and the pin 81 is used.
And the return cylindrical cam 17 is rotationally integrated by being axially coupled using the pin hole 82.

In the second and third embodiments as well, similar to the first embodiment, the transfer distance of the pallet 11 can be freely set by increasing or decreasing the number of cam elements.

[0048]

As described above, according to the pallet transfer device of the present invention, the pallet transfer distance can be freely set.

[Brief description of drawings]

FIG. 1 is a front perspective view showing a first embodiment of a pallet transfer device according to the present invention.

FIG. 2 is a rear perspective view of the pallet transfer device of FIG.

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

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

5 shows the feed cylinder cam of FIGS. 1 and 2;
(A) is a front view thereof, and (B) is a cam development view thereof.

6 is a front view of the return cylindrical cam shown in FIG. 2, and FIG. 6B is a developed view of the cam.

7 is a cam element of the feed cylindrical cam of FIG. 6, (A), (B) and (C) being a front view;
(D) is a front view showing the coupling portion of the cam element, (E)
[Fig. 6] is an exploded perspective view of the connecting portion.

FIG. 8 shows a feed cylinder cam element of a feed cylinder cam in a second embodiment of the pallet transfer device according to the present invention, (A), (B) and (C) being a front view thereof, (D) and (E) are respectively a front view and a perspective view of the connector, and (F) and (G) are a front view and an exploded perspective view of the coupling part, respectively.

9A and 9B show a connecting portion of a feed cylindrical cam element in a third embodiment of the pallet transfer device according to the present invention, FIG. 9A is a partial front view thereof, and FIG. 9B is a partial perspective view thereof. Is.

[Explanation of symbols]

 10 Pallet Transfer Device 11 Pallet 12 Feed Guide Rail 13 Return Guide Rail 14 Return Transfer Device 15 Feed Transfer Device 16 Feed Cylindrical Cam 17 Return Cylindrical Cam 18 Cam Drive Mechanism 25 Cam Roller 29 Feed Cam Groove 30 Return Cam Grooves 50A, 50B, 50C Feed cylindrical cam element 60A, 60B Return cylindrical cam element 51 Coupling convex portion 52 Coupling concave portion 61 Coupling convex portion 62 Coupling concave portion

Front Page Continuation (72) Inventor Makoto Terui 5-14-33 Higashi-Kashigaya, Ebina-shi, Kanagawa Toshiba Seiki Co., Ltd. (72) Hiroo Yamazaki 5-14-33 Higashi-Kashigaya, Ebina, Kanagawa Prefecture Toshiba Within Seiki Co., Ltd.

Claims (1)

[Claims] 1. A pallet is engaged with a guide rail, a cylindrical cam is disposed with its axis along the guide rail, and a cam follower installed on the pallet is fitted in a cam groove of the cylindrical cam. In the pallet transfer device in which the pallet can be transferred along the guide rail via the cam follower and the cam groove by the rotational driving of the cylindrical cam, the cylindrical cam has a modularized cam element as an axis. A pallet transfer device characterized in that a plurality of pallet transfer devices are connected in the same direction.