JPH071041B2 - Guideless rodless cylinder - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rodless cylinder with a guide,
In particular, it relates to a rodless cylinder arranged in a guide frame having a U-shaped cross section.

2. Description of the Related Art In the rodless cylinder as described above, for example, the rodless cylinder is housed in a guide frame having a U-shaped cross section over the entire length in the longitudinal direction of the rodless cylinder, and connection plates ( (End plate referred to in the present application) is connected, this connection plate is brought into contact with the end surface of the guide frame, and a mounting screw is screwed into the tap formed in the end surface of the guide frame, and the rodless cylinder and guide are inserted through the end plate. There is a structure that connects with the frame (Japanese Patent Laid-Open No. 62-237103).

In the rodless cylinder as described above, a slight gap is provided between the outer end surface of the end cap and the inner end surface of the connection plate in assembly (that is, the inner end surface of the connection plate). Since the total length of the rodless cylinder is slightly shorter than the dimension between them, there is a risk that the entire rodless cylinder will move slightly in the axial direction.

In order to prevent such a movement in the axial direction, if the gap is made extremely small, it is required to process the guide frame length in accordance with the entire length of the rodless cylinder in the manufacturing process with extremely high accuracy. There is a problem that the cutting process is troublesome. Moreover, since the tap is formed in the end face of the guide frame and the connecting plate is brought into contact with the end face to connect the both, there is also a problem that the tap processing for each unit is troublesome.

Means for Solving the Problems In order to solve the above problems, the present invention provides a guide for a rodless cylinder arranged in a guide frame having a U-shaped cross section through end plates connected to front and rear ends thereof. In a rodless cylinder with a guide, which is connected to a frame and guides a slider connected to a yoke of a rodless cylinder along an axis of the rodless cylinder by a guide rail of the guide frame, the guide frame has a U-shape. T-grooves are formed on the left and right side walls along the axis along the entire length of the left and right side walls in the state where the opening of the cross section is directed upward, and a mounting surface is formed on the side wall surface on which the T grooves are formed. It is characterized in that the end plate is attached to this attachment surface through a fitting T-shaped groove fastener.

Action According to the above, the guide frame having a U-shaped cross section is cut corresponding to the entire length of the rodless cylinder, and the end plates connected to the front and rear ends of the rodless cylinder are attached to the mounting surfaces of the left and right side walls of the guide frame. , T-grooves on the left and right sidewalls are used to attach via T-groove fasteners. This allows
Since the guide frame and the end plate are not connected at the end surface of the guide frame, it is sufficient if the cutting length of the guide frame is roughly the same as that of the rodless cylinder, and it is not necessary to make the cutting length of the guide frame so accurate and machining is possible. In addition, the rodless cylinder is prevented from moving in the axial direction with respect to the guide frame.

Embodiment 1 In FIGS. 1 and 5, reference numeral 1 is a well-known rodless cylinder, and a yoke 5 integral with a piston 4 projects outward from an axial slit 3 provided on a side wall of a cylinder barrel 2. An engaging convex portion 6 is connected to 5.
The engaging convex portion 6 is made of a material having high wear resistance, and its front and rear end faces are formed into an arc surface 6a. Cylinder barrel 2
End caps 7 are connected by bolts 8 to both ends of the. The end cap 7 is provided with communication passages 10a and 10b communicating with the left and right cylinder chambers 9a and 9b in the cylinder barrel 2, respectively. The slit 3 is sealed from the inside by an inner seal band 11a supported between the end caps 7, and dust is prevented from entering the slit 3 by an outer seal band 11b. The end cap 7 is fitted into the vertical grooves 14 of the end plates 12 and 13, respectively, and the mounting bolt 15 is screwed into the female screw 8a formed on the head of the bolt 8 to end plate 1
It is connected integrally with 2 and 13 (Fig. 2). The end plate 12 is provided with supply / discharge ports 16 and 17, and one port 16
Is communicated with the communication passage 10a, and the other port 17
Is connected to the other end plate 13 via a supply / discharge pipe 18 along the axis of the rodless cylinder 1 and communicates with the communication passage 10b of the left end cap 7. These end plates 12 and 13 are T-shaped as shown in FIG. It is composed of a mounting surface 19b to be placed. The width of the narrow portion 20 of the end plates 12 and 13 is set to the guide frame 22 described later.
The width is set to be narrower than the width of the housing section 28 of the
It is set so that there is a gap between it and the bottom of 28. Further, the guide frames 12 and 13 are provided with bolt holes 21 for mounting bolts.

Reference numeral 22 denotes a guide frame having a U-shaped cross section, which is set to have a length substantially equal to the length of connecting the end plates 12 and 13 to the rodless cylinder 1. Left and right side walls 23 in a state where the opening of the U-shaped cross section of the guide frame 22 is directed upward
A projecting edge 24 and a mounting surface 25 are formed on the upper surface of the above, and a T groove 26 is formed below the mounting surface 25 over the entire length. The end plate is mounted on this mounting surface 25.
12 and 13 are placed, the end plates 12 and 13 and the guide frame 22 are connected to each other by a quad nut 27a and a mounting bolt 27b that are inserted into the T groove 26 of the T groove fastener 27. The pressure cylinder 1 is located inside the accommodating portion 28 of the guide frame 22. Guide rails 29 are mounted on the mounting surface 25 between the end plates 12 and 13 as shown in FIG. 4, and the outer edges of the guide rails 29 are regulated by the projecting edges 24, respectively. The guide rail 29 is fixed to the guide frame 22 by the T-slot fastener 27 through the mounting hole 29a and the T-slot 26 as described above.

Reference numeral 30 is a slider, and guides 31 are fixed to the left and right sides of the lower surface of the slider. The guides 31 are engaged with the guide rails 29 and guided along the axis of the rodless cylinder 1. An engaging recess 30a is formed on the lower surface of the slider 30, the lateral width of which is set to be slightly wider than the lateral width of the engaging projection 6, and a gap 33 is formed on the left and right. A contact piece 32 made of a material having high wear resistance is fixed before and after the engagement recess 30a, and the engagement projection 6 is engaged between the contact pieces 32 to form the arc surface.
6a abuts. Further, there is a gap 33 between the lower surface of the engaging concave portion 30a and the upper surface of the engaging convex portion 6 when the engaging convex portion 6 is fitted in the engaging concave portion 30a. The reference numeral 34 designates a cover which is horizontally provided between the end plates 12 and 13.

In the above, when the pressurized fluid is supplied into the cylinder barrel 2 from either the supply / discharge port 16 or 17, the piston 4 reciprocates, and the slider 30 is guided along the guide rail 29 with high precision. It Even if an abnormal load is generated during the movement of the piston, there is a gap 33 between the engaging projection 6 and the engaging recess 30a in the vertical and horizontal directions, and a planar twist indicates the arc surface 6a of the engaging projection 6.
Is absorbed, and the slider 30 is guided along the guide rail 29 with high precision and accuracy.

Next, when manufacturing such a rodless cylinder with a guide, the end plate of the guide frame 22
Since the 12 and 13 are not brought into contact with each other, the guide frame 22 need only be cut corresponding to the length at which the end plates 12 and 13 are connected to both ends of the rodless cylinder 1, and the high machining accuracy in the longitudinal direction as in the conventional case. Since it is not necessary to cut the rodless cylinder and there is no axial gap between the end plates 12 and 13 and the rodless cylinder, the cylinder barrel of the rodless cylinder does not move in the axial direction.

In this embodiment, the guide rail 29 is also fixed to the guide frame 22 via the T groove 26, and thus the guide rail 29 is
However, even if the guide frame 22 is separate from the guide frame 22, there is an advantage that it is not necessary to increase the dimensional accuracy of the machining pitch of the mounting holes 29a for the mounting bolts to be drilled in the guide rail 29.

In this embodiment, the end plate is fixed to the end cap of the rodless cylinder, but the end plate may also serve as the end cap.

EFFECTS OF THE INVENTION As described above, in the present invention, in the rodless cylinder with a guide, the guide frame is formed with T-grooves along the axis along the left and right sidewalls along its entire length, and the end plate is formed with the T-grooves. On the mounting surface provided on the side wall surface, the T
Since it is attached via the T-groove fastener that engages with the groove, the length of the guide frame is not cut very accurately as compared with the conventional one in which the end plate and the guide frame are connected by the end face of the guide frame. However, the machining becomes easy, and the axial movement of the rodless cylinder is eliminated. In addition, since the T-groove is provided over the entire length of the guide frame, the guide frame can be used as a mold material. By using such a mold material, the T-groove can be prepared in advance, and the end plate for connecting the end plate and the guide frame can be prepared. There is an advantage that the tapping of the end face can be omitted and the manufacturing is extremely easy.

[Brief description of drawings]

1 is a plan view of a rodless cylinder with a guide according to the present application, FIG. 2 is a front view of FIG. 1, FIG. 3 is a right side view of FIG. 2, and FIG. 4 is IV-IV of FIG. FIG. 5 is a sectional view showing the connection between the yoke and the slider. 1 …… Rodless cylinder, 5 …… Yoke, 12 ・ 13 ……
End plate, 22 ... Guide frame, 25 ... Mounting surface, 26 ... T-slot, 27 ... T-slot fastener, 29 ... Guide rail, 30 ... Slider

Claims (1)

[Claims] 1. A slider in which a rodless cylinder arranged in a guide frame having a U-shaped cross section is connected to the guide frame via end plates connected to front and rear ends thereof, and a slider connected to a yoke of the rodless cylinder. In the rodless cylinder with a guide configured to be guided along the axis of the rodless cylinder by the guide rails of the guide frame, the guide frame has a U-shaped cross-section on its left and right side walls in an upward direction. Forming a T-groove along the axis along the entire length, forming a mounting surface on the side wall surface on which the T-groove is formed, and attaching to the mounting surface via a T-groove fastener that engages with the T-groove. A rodless cylinder with a guide, characterized by being equipped with end plates.