JPH0716084Y2 - Rodless cylinder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention provides a cylinder barrel with slits in the barrel axial direction over the entire length, attaches end caps to both ends of the cylinder barrel, and projects outward from the slits on the piston. The connecting part is provided, and the mount is provided on the connecting part.
The present invention relates to a rodless cylinder formed by sealing a slit with a seal band.

As is well known, the rodless cylinder does not protrude from the cylinder barrel, so it can be installed in approximately half the space of a conventional cylinder with a rod, and the stroke of the piston must be lengthened. Since it has the advantage that it can be used, it has been widely used for various purposes in recent years.

Thus, in the conventional rodless cylinder, the piping of the pressure fluid line for supplying and discharging the pressure fluid has the both ends (R, L) of the cylinder barrel as shown in JP-A-62-266206. )
It is a double-sided pipe that has a pressure fluid supply / discharge port on the end cap attached to. Therefore, if piping is done on both sides in a rodless cylinder with a long piston stroke (for example, a stroke of 12 m), not only will the total length of the piping be long, but also the fixtures for the piping extending along the cylinder barrel will be exposed to the outside. However, there is a problem that not only the external shape is deteriorated but also the mounting space is increased, and the important advantage of the rodless cylinder that can be compactly mounted in a narrow mounting space is lost.

Means for Solving the Problems In view of the above-mentioned conventional drawbacks, the present invention provides a cylinder barrel with:
A pair of through-holes in the barrel axial direction are integrally formed on the side opposite to the slit side with respect to the barrel center, and the end caps at both ends are the other four sides except the upper surface side when the slit is facing upward. Each of the supply / discharge ports for the pressure fluid is formed on the outer surface of the, and one of the four supply / discharge ports of the end cap on the one end side is used as the B port, the other as the A port, and the end cap on the other end side. All of the supply / discharge ports are B ports, and the B port of the end cap on the one end side and the B port of the end cap on the other end side are made to communicate with each other through the through hole, and are appropriately selected from the plurality of A and B ports. In addition, by selectively using a pair of ports A and B to close the other ports, the fluid conduit of the pressure fluid can be arbitrarily selected for one side piping or both sides piping depending on the situation of the mounting location or other circumstances. Moreover, the piping direction can be selected in various ways. It is characterized in that it has to so that.

Embodiment Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. Prior to the description, an outline of a known rodless cylinder 1 will be described. In the drawing, reference numeral 2 denotes a cylinder barrel formed of a non-magnetic material such as aluminum, which has a substantially rectangular cross section. In the cylinder barrel 2, a piston chamber 4 into which a piston 3 described later is fitted is formed,
A slit 5 communicating with the piston chamber 4 is provided on the upper wall 8 on the upper side in FIG. 6 over the entire length in the axial direction. At both ends of the cylinder barrel 2, an R-side end cap 6 and an L-side end cap 7 are attached and sealed. Sealing bands 9 and 10 made of a magnetic material are attracted to a permanent magnet 11 embedded along the slit 5 in the upper wall 8 of the cylinder barrel 2 to seal both upper and lower surfaces of the slit 5.

Next, the piston 3 is slidably fitted in the piston chamber 4,
The recessed groove 12 is provided on the lower side of the intermediate portion and has a substantially U-shaped cross section, and the inside seal band is provided in the recessed groove 12.
10 has been inserted. A connecting portion 13 is integrally formed on the upper side of the concave groove 12, the connecting portion 13 projects through the slit 5 to the outside of the cylinder barrel 2, and an outer seal is formed in a concave groove 12a formed on the upper surface of the connecting portion 13. The band 9 is fitted. A mount 14 is attached to the connecting portion 13, and a body to be transferred is attached to the mount 14.

In the rodless cylinder 1 as described above, conventionally, in FIG. 1, each of the R and L side end caps 6 and 7 is provided with one pressure fluid supply port, and this port is connected to the pressure fluid supply source. The pressurized fluid was supplied to and discharged from the cylinder chamber 4, but the fluid conduit 15 in the present application is as follows.

In the drawing, 16 and 17 are through holes penetrating through the cylinder barrel 2 in parallel with the barrel axis, and the center line S of the cylinder barrel 2 passing through the slit 5 at a position opposite to the slit 5 side with respect to the barrel center. It is molded integrally in a symmetrical position with respect to. As will be apparent from the following description, either one of the through holes 16 and 17 achieves the object of the present application, but a pair of left and right holes is provided to prevent the accuracy of the cylinder barrel 2 from deteriorating and the strength from becoming unbalanced. In addition, the installation location and the size of the hole diameter should be adjusted so that the strength of the cylinder barrel 2 does not fall below a predetermined level in consideration of various conditions such as the pressure of the pressurized fluid acting in the piston chamber 4 and the wall thickness of the cylinder barrel 2. It is set.

Next, the pressure fluid supply port P formed in the end caps 6 and 7 on both the R and L sides and the fluid pipe 15 connecting the supply / discharge port P and the piston chamber 4 will be described. First, in the R-side end cap 6, pressure fluid supply / discharge ports P are formed on the four outer surfaces of the front surface, the bottom surface, the end surface, and the rear surface excluding the upper surface side that is the upper side when the slit 5 is directed upward. It is set up. Then, of these four supply / discharge ports P, the supply / discharge port P on the end face and the piston chamber 4 are connected by the main pipe line 18 to form the A1 port, and the supply / discharge port formed on the front surface and the bottom surface. Each of P is communicated with the main pipe 18 by the connecting pipes 19 and 20, and the supply and discharge ports P of these P are A2 and A3 ports, respectively. As is clear from the above, the A2 and A3 ports communicate with the piston chamber 4 via the connecting pipes 19 and 20 and the main pipe 18,
These A1, A2, and A3 ports form an A port group.

The supply / discharge port P formed on the rear surface of the R-side end cap 6, that is, the remaining one supply / discharge port P of the R-side end cap 6 is connected to the two through holes 16 by the connecting pipe line 21. 17
One of the through holes 17 is communicated with the right end portion in the drawing, and the supply / discharge port P is a B1 port.

Next, the L-side end cap 7 will be described. Similarly to the R-side end cap 6, the L-side end cap 7 is provided with a supply / discharge port P on each of the other four surfaces except the upper side surface which is the upper side when the slit 5 is directed upward. Similar to the R side, the supply / discharge port P bored on the end face and the piston chamber 4 are communicated with each other through the main pipe line 22, and the supply / discharge port P bored on the front face, the rear face and the bottom face are connected to the main pipe line 22. Road 23,2
4 and 25 are connected to communicate with the piston chamber 4, and these four supply / discharge ports P are B2, B3, B4 and B5 ports. Further, in the above, the B1 port of the end cap 6 on the R side is communicated with the communication pipe line 21. The left end portion of the through hole 17 and the main pipe line 22 of the L side end plate 7 are connected by a communication pipe line 26, and the B1 port of the R side end cap 6 is made to communicate with the piston chamber 4, and these B1 to B5 are connected. The port constitutes the B port group.

In the rodless cylinder of the present application configured as described above, when one-side piping is performed, the B1 port of the R-side end cap 6 and a pressure fluid supply source (not shown) are connected by the pipe 28, and From the A1 to A3 ports, select the most suitable port (A1 port in the drawing) in consideration of workability and the like, and connect this A1 port to the pressure fluid supply source with the pipe 28 in the same manner as the B1 port. All ports other than the pair of A1 and B1 ports that are appropriately selected for
Close at 27. As described above, when pressure fluid is supplied from the A1 port to the piston chamber 4, the piston 3 moves from right to left in FIG. The body (not shown) is transferred by a predetermined stroke. When the pressure fluid is supplied from the B1 port, the supplied pressure fluid reaches the L side end cap 7 from the communication line 21 of the R side end cap 6 through the through hole 17 and reaches the communication line of the end cap 7. The piston 3 enters the piston chamber 4 through 26 and the main conduit 22, and the piston 3 moves from the left side to the right side in the opposite manner to the above. As described above, in the rodless cylinder of the present application, the work is normally performed by the one-sided piping, but when the one-sided piping causes some trouble in the work, the both-sided piping is performed. In this case, one is appropriately selected from the A1 to A3 ports of the R side end cap 6 and the B2 to B5 ports of the L side end cap 7, and the other A and B ports are all closed in the same manner as above. .

As described above, according to the present invention, the rodless cylinder can be operated by piping on one side only on one end side of the rodless cylinder to eliminate the piping defects caused by the piping on both sides, thus increasing the stroke. Even with the rodless cylinder, it is possible to efficiently pipe and improve workability and productivity. In addition, since the through hole is formed on the side opposite to the slit side with respect to the barrel center of the cylinder barrel, the weight of the barrel can be reduced without lowering the barrel strength, resulting in a rodless cylinder with a long stroke. However, bending deformation due to the weight of the cylinder barrel can be reduced. In addition, pressure fluid supply / discharge ports are drilled on the four outer surfaces of the end caps at both ends, and one of the four supply / discharge ports of the end cap at one end is used as the B port and the other is used as the A port. , All the supply and discharge ports of the end cap on the other end side are B ports, and A and B are appropriately selected from a plurality of A and B ports.
Since a pair of ports is selectively used to close the other port, one side piping and both sides piping can be arbitrarily selected depending on the situation of the mounting location, and various piping directions can be selected, increasing versatility. There is an effect that can be done.

[Brief description of drawings]

The drawings show an embodiment of the present application, FIG. 1 is a side view with a main part cut away, FIG. 2 is a plan view, FIG. 3 is a sectional view taken along line III-III of FIG. 1, and FIG. 4 is FIG. IV-IV sectional view of FIG. 5, FIG.
6 is a sectional view taken along the line VV of FIG. 6, and FIG. 6 is a sectional view taken along the line VI-VI of FIG. 1 ... Rodless cylinder, 2 ... Cylinder barrel 3 ... Piston, 6 ... R side end cap 7 ... L side end cap, 15 ... Fluid pipeline 16, 17 ... Through hole, 18, 22 ... Main pipeline 19, 20, 21 , 23, 24, 25, 26 ... Communication line, P ... Pressure fluid supply / discharge port

Claims (1)

[Scope of utility model registration request] 1. A cylinder barrel is provided with slits in the barrel axial direction over the entire length, end caps are attached to both ends of the cylinder barrel, and a piston is provided with a connecting portion projecting outward from the slit, and the connecting portion is mounted on the connecting portion. In the rodless cylinder configured by sealing the slit with a seal band, the cylinder barrel is integrally formed with a pair of through holes in the barrel axial direction on the side opposite to the slit side with respect to the barrel center, The end caps at both ends are provided with pressure fluid supply / discharge ports on the other four outer surfaces except for the upper surface side when the slit is directed upward, and the four end cap end supply caps are provided. One of the exhaust ports is the B port, the other is the A port, and the supply and exhaust ports of the other end side end cap are all B ports.
The B port of the end cap on one end side and the B port of the end cap on the other end side are made to communicate with each other through the through hole, and a pair of A and B ports can be selectively selected from the plurality of A and B ports. A rodless cylinder that is used for and has other ports closed.