JPH0628312U - Cylinder - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a cylinder in which the mounting surface is not restricted and the mounting direction is not restricted. A pneumatic cylinder 20 has a set of fluid piping ports 32a, 32b spaced apart from each other by a predetermined distance. Mounted on the same side as the first side surface 30a of the cylinder body 22 having at least the fluid piping ports 32a, 32b, and the piston rod connected to the piston. Long grooves 34a, 34b for mounting the sensor 33 are defined substantially parallel to each other along the displacement direction of the piston.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cylinder having a long groove formed on the same surface as one side surface of a cylinder body having a fluid piping port.

[0002]

[Prior art]

 FIG. 4 shows a cylinder according to a conventional example. The cylinder 2 includes a cylinder body 4 formed in a substantially rectangular shape, a piston (not shown) which is housed in the cylinder body 4 and linearly displaced, and a piston rod which is connected to the piston and projects outward. It is composed of a pad 6 and a bush 8 that functions as a receiving member for the piston rod 6. On the outer side surface of the cylinder body 4, a pair of fluid piping ports 10a and 10b are arranged on the upper surface of the cylinder body 4 in the figure, and the side surface portion on the opposite side facing the upper surface of the cylinder body 4 and the piston Two long grooves 12a to 12f each having a substantially rectangular cross section are defined on a side surface portion orthogonal to the displacement direction. A sensor 14 having a shape corresponding to the sectional shape of the long grooves 12a to 12f is mounted at a predetermined position of the long grooves 12a to 12f. The sensor 14 detects the position of the piston by detecting the magnetism from a magnet ring (not shown) fitted to the piston, for example. In the vicinity of the four corners of the cylinder body 4, mounting holes 16a to 16d for fixing the cylinder 2 to a wall or the like via bolts (not shown) are provided.

[0003]

[Problems to be solved by the device]

 However, in the cylinder 2 according to the related art, long grooves 12a to 12f for mounting the sensor 14 are provided only on three outer surfaces of the cylinder 2, and are flush with the side surfaces defining the fluid distribution ports 10a and 10b. No long groove for attaching the sensor 14 is provided above. As a result, in the installation environment where the cylinder 2 is attached, for example, when the cylinder 2 is fixed in a recess or the like, an object or the like is arranged close to the three side surfaces where the long grooves 12a to 12f are provided. The attachment of the sensor 14 to the long grooves 12a to 12f may be restricted. Therefore, due to the installation environment of the cylinder 2, the mounting direction of the cylinder 2 is restricted in order to mount the sensor 14 on any one of the three surfaces defining the long grooves 12a to 12f. There is.

The present invention has been made to overcome such inconvenience, and by providing a long groove for mounting a sensor on at least the same surface as the surface on which the fluid piping port is arranged, An object of the present invention is to provide a cylinder which is not restricted by the surface on which the sensor is mounted and whose mounting direction is not restricted.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a cylinder body having a set of fluid piping ports spaced apart from each other by a predetermined distance, a piston housed in the cylinder body and reciprocating, and A piston rod connected to the piston, and at least on one surface of the cylinder body having the fluid piping port, a long groove is defined substantially parallel to the displacement direction of the piston. It is characterized by

[0006]

[Action]

 In the cylinder according to the present invention, since the long groove is formed on the same surface as one side surface of the cylinder body having at least the fluid piping port, the sensor can be attached to the long groove. Therefore, for example, even when the cylinder is installed in a recess or the like, even when the attachment of the sensor is restricted by an object or the like on the other side surface except the one side surface where the fluid piping port is defined, The sensor can be mounted in a long groove defined on the same plane as the fluid piping port.

[0007]

【Example】

 A cylinder according to the present invention will be described in detail below with reference to the accompanying drawings, with reference to preferred embodiments.

1 and 2, reference numeral 20 indicates a pneumatic cylinder (hereinafter referred to as a cylinder), which includes a cylinder body 22 and a piston 24 housed in the cylinder body 22. , A piston rod 26 extending from the piston 24 to the outside of the cylinder body 22. The cylinder body 22 has a substantially rectangular shape, and the four corners thereof are provided with wall portions (described later) or attachment holes 28a to 28d for attachment to other devices not shown. Fluid pipe ports 32a and 32b for supplying and exhausting compressed air are provided at the center of the first side surface (referring to the upper surface of the cylinder 22 shown in FIG. 1) 30a of the cylinder body 22. Further, long grooves 34a to 34h for attaching the sensor 33 are defined on four surfaces of the outer side surfaces 30a to 30d of the cylinder body 22 including the first side surface 30a. The long grooves 34a to 34h have a substantially circular cross section, are formed to have substantially the same shape, and are arranged in parallel with the displacement direction of the piston 24. A convex portion 35 is formed along the longitudinal direction of the sensor 33, and the convex portion 35 is flush with the side surface of the cylinder body 22 when the sensor 33 is mounted in the long grooves 34a to 34h.

A seal member 38 is provided on the outer peripheral surface of the piston 24 so as to be in sliding contact with the inner peripheral surface of the cylinder body 22 to maintain the airtightness of the piston chambers 36 a and 36 b partitioned by the piston 24. A magnet ring 40 whose magnetism is detected by the sensor 33 is fitted in each of the circumferential grooves. An internally threaded portion 42 is provided at one end of the piston rod 26 which is connected to the piston 24 and extends outwardly, and a workpiece transfer means such as a suction pad is screwed to the internally threaded portion 42. A bush 44, which holds the piston rod 26 and functions as a cover member, is provided on one side surface of the cylinder body 22 that is orthogonal to the first side surface 30a.

The cylinder 20 according to this embodiment is basically configured as described above, and its operation will be described next.

First, as shown in FIG. 3, the cylinder 20 is placed in the recess 46, and bolts 48 are inserted into the mounting holes 28 a to 28 d defined at the four corners of the cylinder body 22 to insert the cylinder 20 into the cylinder 20. Is fixed to the wall 50. In this case, the cylinder 20 may be fixed by inserting the bolt 48 previously fixed to the wall portion 50 into the mounting hole portions 28a to 28d. Next, for example, the pipe joints 52a and 52b are inserted into the fluid pipe ports 32a and 32b defined on the first side surface 30a of the cylinder body 22, respectively, and the compressed air is passed through the pipe joints 52a and 52b. Connect a tube 54 for supplying and exhausting.

Next, in order to mount the sensor 33 in the long grooves 34a to 34h defined in the cylinder body 22, the four side surfaces 30a to 30d in which the long grooves 34a to 34h are defined are formed into a desired first side surface 30a. Select. In this case, in the cylinder 2 according to the related art shown in FIG. 4, the long groove for mounting the sensor 14 is not formed on the same surface as the surface on which the fluid piping ports 10a and 10b are defined. For example, when the cylinder 20 is mounted and fixed in the recess 46 shown in FIG. 3, mounting of the sensor 14 is difficult. However, in the cylinder 20 according to the present embodiment, even in such a case, the sensor 33 can be easily attached to the long groove 34b (34a) defined on the same plane as the fluid piping ports 32a and 32b. It is possible. Since the fluid piping ports 32a and 32b are essential constituent elements for supplying compressed air to the piston chambers 36a and 36b of the cylinder 20 and discharging the compressed air, the cylinder body having the fluid piping ports 32a and 32b is provided. The first side surface 30a of 22 is exposed to the outside without being restricted by an object or the like. Therefore, even if the installation environment of the cylinder 20 is limited by an object or the like on the other three side surfaces 30b to 30d in which the long grooves 34c to 34h are defined, as shown in FIG. 3, the fluid piping port 32a. , 32b having the first side surface 30a is always exposed to the outside. As a result, by defining the long grooves 34a and 34b for mounting the sensor 33 on the same surface as the first side surface 30a, any of the long grooves 34a to 34h can be formed without being affected by the installation environment. The sensor 33 can be attached. In this case, the sensor 33 is mounted in the long grooves 34a to 34h without protruding from one side surface of the cylinder body 22 formed flat.

Next, compressed air is introduced into the piston chamber 36 a, which is the inner portion of the cylinder body 22, via one of the fluid piping ports 32 a (32 b), and the piston rod 26 moves its stroke during displacement of the piston 24. It is displaced in the arrow X direction within the range (see FIG. 2). In this case, the compressed air is exhausted from the other fluid piping port 32b (32a). In this way, the piston 24 linearly displaces to reach the end position of the piston chamber 36b, and subsequently, by operating a switching valve (not shown), the fluid piping ports 32a and 32b, which are respectively opposite to the above, are operated. The compressed air is supplied and exhausted, and the piston rod 26 is displaced in the arrow Y direction.

In this case, the sensor 33 mounted in the long groove 34 b of the cylinder body 22 detects the magnetism generated from the magnet ring 40 fitted on the outer peripheral surface of the piston 24, and thereby detects the position of the piston 24. Can be detected.

[0015]

[Effect of device]

 The cylinder according to the present invention has the following advantages.

That is, in the cylinder according to the present invention, since the long groove is formed on the same surface as one side surface of the cylinder body having at least the fluid piping port, the sensor can be attached to the long groove. Therefore, even when the attachment of the sensor is restricted by an object or the like on the other side surface other than the one side surface where the fluid piping port is defined, as in the case where a cylinder is installed in a recess or the like, The sensor can be easily attached. As described above, according to the present invention, it is possible to obtain the effects that the surface on which the sensor is mounted is not restricted and the mounting direction of the cylinder is not restricted unlike the conventional cylinder.

[Brief description of drawings]

FIG. 1 is a perspective view showing a cylinder according to an embodiment of the present invention.

2 is a vertical cross-sectional view of the cylinder shown in FIG.

FIG. 3 is an explanatory view showing a state in which the cylinder shown in FIG. 1 is attached to a recess.

FIG. 4 is a perspective view showing a cylinder according to a conventional example.

[Explanation of symbols]

 20 ... Pneumatic cylinder 22 ... Cylinder body 24 ... Piston 26 ... Piston rod 30a ... 1st side surface 32a, 32b ... Fluid piping port 33 ... Sensor 34a-34h ... Long groove 40 ... Magnet ring 44 ... Bush

Claims (1)

[Scope of utility model registration request] 1. A cylinder body having a set of fluid piping ports spaced apart by a predetermined distance, a piston accommodated in the cylinder body and reciprocating, and a piston rod connected to the piston. , And a long groove is defined substantially parallel to the one side surface of the cylinder body having at least the fluid piping port along the displacement direction of the piston.