JPH081778Y2 - Fluid pressure cylinder device - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The present invention relates to a fluid pressure cylinder device that operates by a pressure fluid, and is used, for example, in a component transfer device in an automatic assembly device.

2. Description of the Related Art Conventionally, in an automatic assembly apparatus or the like, a suction pad that sucks a conveyed product by negative pressure has been used to convey a conveyed product such as parts and tools. Hydraulic cylinders are often used to press the suction pads against the surface of the load. In this case, the suction pad is attached to the tip end portion of the piston rod of the fluid pressure cylinder, and the suction pad is pressed against the conveyed object or separated from the conveyed object by the operation of the fluid pressure cylinder. However, according to the conventional fluid pressure cylinder, when the suction pad is pressed against the object to be conveyed, too much thrust of the fluid pressure cylinder is directly applied to the suction pad and the object to be conveyed, so that the object to be conveyed or the object to be sucked is damaged. Further, there is a problem that the fluid pressure cylinder is damaged and its life is shortened. Therefore, it is necessary to adjust the stroke of the fluid pressure cylinder so that the suction pad comes into contact with the transported object immediately before the fluid pressure cylinder reaches the stroke end, and this adjustment work is not easy. It took effort. To solve this problem, attach a plate-shaped bracket to the tip of the piston rod of the horizontal air cylinder,
A device has been proposed in which a suction tube having a suction pad attached to its tip is inserted into a hole of a bracket so as to be movable in the axial direction, and a compression spring is interposed between a flange of a tip portion of the suction tube and the bracket. No. 55-131448). However, in this device, since the suction pipe is only guided by the hole of the bracket, there is rattling between the bracket and the suction pipe, and the suction pad attached to the tip of the suction pipe has a position in the suction surface. Uncertain. Further, since the suction pipe may rotate with respect to the bracket and the piston rod may rotate with respect to the air cylinder, the adsorbed work may rotate, and the bracket itself may rotate with the piston rod. Therefore, it is not possible to position the sucked workpiece within the suction surface. Moreover, this device has a large geometrical size and requires a large space for installation. The present invention eliminates such conventional drawbacks and prevents the thrust of the fluid pressure cylinder from being directly applied to the transported object and the like, and prevents damage to the transported object without adjusting the stroke of the fluid pressure cylinder. An object of the present invention is to provide a compact fluid pressure cylinder device capable of accurately positioning a suctioned work within a suction surface.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, the present invention provides a rectangular parallelepiped main body block in which a cylinder hole and a guide hole are provided in parallel to each other and at substantially the same axial position, and a piston which slides closely in the cylinder hole. A piston rod connected to the piston and having a tip portion protruding from the cylinder hole; a cover forming a fluid pressure chamber in the cylinder hole to drive the piston in at least one direction; Port provided in the main body block for supplying the above, a guide member mounted in the guide hole and provided with a spline groove, and supported by the guide member so as to be slidable in the axial direction and non-rotatable in the circumferential direction. And is fixedly connected to the operation shaft formed of a spline shaft protruding from both ends of the guide hole and the tip end portion of the piston rod, and A connecting plate having one end of the shaft slidably passing therethrough, a stop member for preventing the connecting plate from slipping out from one end of the operating shaft, and an operating shaft provided on the outer periphery of the operating shaft. The connecting plate and the connecting plate have a compression spring that urges the connecting plate in a direction in which the connecting plate comes out of the operating shaft.

[Action]

When the pressurized fluid is supplied and discharged from the port, the piston and the piston rod move in the axial direction. The movement of the piston rod also moves the connecting plate, which in turn moves the operating shaft. However, when the other end of the operating shaft is pressed against a conveyed object, the operating shaft and the connecting plate slide with each other, and the compression spring is compressed. Therefore, even though the piston reaches the stroke end, the thrust of the piston is transmitted to the operation shaft via the compression spring, and the operation shaft stops with a proper pressing force applied to the conveyed object. When the piston returns, the stop member also returns the operating shaft. The operation shaft is precisely supported by the guide member so as to be movable only in the axial direction, and the cylinder hole and the guide hole are integrally provided in the body block, and the piston rod and the operation shaft are axially provided along these holes. Since the operation shaft, that is, the suction pad does not rotate, the positioning in the suction surface is performed with high accuracy.

【Example】

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a sectional front view of a fluid pressure cylinder device 1 according to the present invention, and FIG. 2 is a plan view of the fluid pressure cylinder device 1. The fluid pressure cylinder device 1 includes a main body block 11 having a bottomed cylinder hole 12 having a cover 11a and a guide hole 13 parallel to the cylinder hole 12 and a cylinder block made of light metal or synthetic resin. Piston 14 that slides on the piston, a piston rod 15 that is connected to the piston 14 and has a tip protruding from the cylinder hole 12, a cover 16 that penetrates the piston rod 15 in a hermetically slidable manner, and a fluid formed in the cylinder hole 12. Port 1 for supplying and discharging compressed air to the pressure chambers 31, 32
7,18, a guide member 21 mounted in the guide hole 13, an operation shaft 22 slidably supported by the guide member 21 in the axial direction, fixed to the tip of the piston rod 15 with a bolt 23, and a sliding hole 25. A connecting plate through which one end of the operating shaft 22 slidably penetrates
24, a stop member 26 for preventing the connecting plate 24 from coming off from the end of the operation shaft 22, and two large and small compression springs 27, 28. The piston 14 is provided with a magnet 41, and this magnet 41, when the piston 14 is at the rising end,
The reed switch 43 inserted in the insertion hole 42 provided in the axial direction downward from the upper surface of the main body block 11 is operated. The compression spring 27 having a large outer shape and a large spring constant is mounted between the upper end surface of the guide member 21 and the lower surface of the connecting plate 24. The compression spring 27 constantly urges the connecting plate 24 upward with respect to the main body block 11, which causes the ports 17, 1
When the compressed air is not supplied from 8, the connecting plate 24 is returned to the upper stroke end. The compression spring 28, which has a small outer shape and a small spring constant and is arranged inside the compression spring 27, is mounted between a stopper member 29 provided near the center of the operating shaft 22 and the lower surface of the connecting plate 24. The compression spring 28 urges the connecting plate 24 in a direction in which the connecting plate 24 comes out of the operating shaft 22, that is, in a direction in which the connecting plate 24 is pressed against the stopper member 26. The downward thrust of the piston 14 is transmitted to the operating shaft 22 via the compression spring 28. The operation shaft 22 is provided with a communication hole 51 penetrating its axis and an engagement step 52 at the lower end thereof.
A suction pad 53 is attached to 52. A spline nut is used as the guide member 21 and a spline shaft is used as the operation shaft 22, which are brought into contact with each other by a large number of rolling balls, so that the operation shaft 22 moves in an axial direction very smoothly. Next, the operation of the fluid pressure cylinder device 1 configured as described above will be described. First, when compressed air is supplied from the upper port 17, the pressure generated in the upper fluid pressure chamber 31 exerts a force to push the piston 14 downward. Since this thrust is stronger than the spring force of the compression spring 27, the piston 14 resists the compression spring 27.
Descends together with the connecting plate 24 and reaches the descending end (state shown in FIG. 1). During this period, the lower port 18 serves to open the air in the lower fluid pressure chamber 32 to the atmosphere. At this time, since the operation shaft 22 is biased downward by the compression spring 28, the operation shaft 22 descends as the connecting plate 24 descends, and the suction pad 53 is appropriately pressed against the surface of the conveyed article W (first (State shown in the figure). However, when the conveyed article W is located above the position shown in FIG. 1, during the stroke of the piston 14,
Although the compression spring 28 is compressed and the operation shaft 22 slides in the sliding hole 25 from the time when the suction pad 53 is pressed against the conveyed object W, the connecting plate 24 descends to the descending end, The operation shaft 22 and the suction pad 53 are stopped while being pressed against the conveyed article W with an appropriate pressing force. Therefore, no matter what position the transported article W is,
Moreover, even if the stroke length of the piston 14 is not adjusted, the thrust of the piston 14 is not directly applied to the conveyed article W and the suction pad 53, and they are not damaged. When the supply of compressed air from the port 17 is stopped, the spring force of the compression spring 27 causes the connecting plate 24 and the piston rod 1
5, and the piston 14 rises, and the operating shaft 2
2 and the suction pad 53 also rise. According to the above-described embodiment, the lower side of the cylinder hole 12 is closed by the thin cover portion 11a which is a part of the main body block 11, and the operation shaft 22 is smoothly guided by the guide member 21 provided in a part of the guide hole 13. , The guide member in the guide hole 13
Since the compression spring 27 and the compression spring 28 are doubly mounted in the upper space of 21, the outer shape of the fluid pressure cylinder device 1 is extremely small. By connecting to the port 51a at the upper end of the communication hole 51 by piping, negative pressure or compressed air can be supplied to the lower end of the operating shaft 22. In the above embodiment, the compression spring 28 may be omitted and compressed air may be supplied to and discharged from both the upper and lower ports 17 and 18. Instead of the suction pad 53, a chuck device or the like can be attached. The spring force of the compression spring 28 can be variously changed according to the required thrust of the operation shaft 22.
The structure, shape, material, size, etc. of each part of the fluid pressure cylinder device 1 may be various other than those described above.

[Effect of device]

According to the present invention, the thrust of the fluid pressure cylinder is not directly applied to the conveyed object, and the conveyed object is prevented from being damaged without adjusting the stroke of the fluid pressure cylinder. Moreover, since the operating shaft formed of the spline shaft is accurately supported by the guide member having the spline groove so as to be movable only in the axial direction, the suctioned work can be accurately positioned within the suction surface. Also,
The cylinder hole and the guide hole are provided in the rectangular parallelepiped main body block in parallel with each other at substantially the same axial position,
Since the structure is such that the piston rod and the operating shaft move axially along these holes, the entire apparatus can be made compact.

[Brief description of drawings]

FIG. 1 is a sectional front view of a fluid pressure cylinder device according to the present invention, and FIG. 2 is a plan view of the fluid pressure cylinder device. 1 ... Fluid pressure cylinder device, 11 ... Main body block, 12 ...
… Cylinder hole, 13… Guide hole, 14… Piston, 15…
… Piston rod, 31 …… Fluid pressure chamber, 16 …… Cover, 17
...... Port, 21 …… Guide member, 22 …… Operation axis, 24 ……
Connecting plate, 26 ... Stopping member, 28 ... Compression spring.

Claims (1)

[Scope of utility model registration request] 1. A rectangular parallelepiped main body block in which a cylinder hole and a guide hole are provided in parallel to each other and at substantially the same axial position, a piston that closely slides in the cylinder hole, and a piston connected to the piston, A piston rod having a tip portion protruding from the cylinder hole, a cover forming a fluid pressure chamber in the cylinder hole to drive the piston in at least one direction, and the body for supplying pressure fluid to the fluid pressure chamber. A port provided in the block, a guide member mounted in the guide hole and provided with a spline groove, and supported by the guide member so as to be slidable in the axial direction and non-rotatable in the circumferential direction, and both ends of the guide hole. And an operating shaft formed of a spline shaft that is fixedly connected to the distal end of the piston rod, and one end of the operating shaft is slidable. Operatively penetrating plate, a stop member for preventing the connecting plate from slipping out from one end of the operating shaft, and provided on the outer periphery of the operating shaft, between the operating shaft and the connecting plate. A fluid pressure cylinder device, comprising: a compression spring that biases the connecting plate in a direction of coming out of the operation shaft.